Requirements: construction scheme of small bridge

The first chapter project description

1. 1 project overview

1.2 hydrometeorology

1.3 main materials

(1) concrete:

Precast members and cast-in-place bridge deck adopt C3O concrete;

C25 concrete is used to produce pier caps, ear back walls, railings and capping beams;

C20 concrete is used as the concrete foundation;

C30 waterproof concrete is used for bridge deck pavement.

(2) ordinary steel bar:

The rebar diameter ≥ 12mm adopts HRB335 hot-rolled threaded rebar, and its mechanical index shall comply with the provisions of Grade II rebar in GB 1499-98;

Reinforcement diameter < < 12mm shall be R235 reinforcement, and its mechanical index shall comply with the provisions of Grade I reinforcement in GB13013-91;

(3) Felt bearing is made of four felts and three oils, with a thickness of 2 cm.

Chapter II General Layout of Construction and Construction Preparation

2. 1 general layout

Considering that the project is scattered and the newly-built bridges have the same structure, according to the bidding data and site survey, it is planned to set up a centralized prefabrication yard in one place to prefabricate all small and medium-sized precast beams, plates and railings in a centralized way, and then transport them to the corresponding bridge site for installation. Set up temporary facilities at each new bridge site to meet the needs of site construction. Workshop planning is based on the principle of nearby layout, which is convenient for construction supervision. At the same time, comprehensive consideration should be given to reasonable planning and layout, and it should be implemented after being approved by the supervisor.

2.2 On-site diplomatic channel

The transportation of this project is convenient, and the existing township roads can meet the construction needs, ensuring the transportation of construction machinery, equipment, materials and supplies. According to the arrangement of temporary facilities on the site, the traffic roads in the site shall be completely leveled, and then the traffic roads shall be arranged.

2.3 Construction water

Domestic water: the domestic water at the construction site is pumped by drilling wells.

Water for construction and production: draw the river water that has passed the inspection nearby from Hanoi.

2.4 Communications, Lighting and Electricity

The main personnel on the construction site are equipped with mobile phones, which can easily contact with the outside world. At the same time, my project manager will install program-controlled telephones and fax machines to meet the construction needs and keep the communication smooth.

Because there are many temporary production facilities along the line, we will contact Huaiyin District Power Supply Bureau when we enter the site, and try our best to connect the power grid to the construction site. According to the capacity of on-site electrical equipment, electric meters are equipped, temporary lines are set up in the temporary facilities layout area, outdoor lighting rainproof lamps are installed, and distribution boxes are set on poles for power supply. At the same time, we will provide our own generator as a backup.

2.5 Temporary production facilities

There are sand and gravel yards, mixing stations and cement warehouses in each adjacent area, with a central prefabrication yard of 3,000 square meters and sand and gravel yards, mixing stations, cement warehouses, carpentry, steel bars, metal processing plants and laboratories of 20 square meters.

2.6 aggregate system

Set up a gravel yard in the temporary area. Gravel yard adopts 15cm gravel as cushion, with a drainage slope of 0.5%, and a drainage ditch is set in the slope direction to ensure the purity of gravel, reduce the silt content, control the water content, and build a wall in the middle to separate it and pile it up in different warehouses.

2.7 concrete and mortar mixing system

Because the eight bridges in this project are far apart, in order to ensure the quality of concrete pouring, internal concrete mixing stations are set up in each adjacent area. Each concrete mixing station is equipped with 1 350 concrete mixer and 20m3 reservoir to extract river water as mixing water. A 20m2 cement silo is set in the production area, which can store cement.

2.8 concrete member prefabrication yard

Comprehensive consideration is given to factors such as the setting of prefabrication site, transportation, and material entry. The precast site of the project center is provided with concrete ground, and the precast beam and slab site can be leveled by using the original ground.

2.9 Woodworking Factory

A woodworking factory is set up in the adjacent area, and the template is assembled according to the design drawings. The on-site workshop only undertakes the dismantling, storage, renovation, coating of release agent and processing of cast-in-place concrete formwork. Woodworking room covers an area of 20㎡. Woodworking yard is equipped with circular saw, small combined planer and grinder.

2. 10 steel processing plant

A steel bar processing plant is set up in the front area, with a yard area of 400 m2, which is responsible for straightening, stretching, bending, welding, cutting and binding the steel bars on site.

2. 1 1 Temporary living and office facilities

Temporary offices and living rooms will be set up in each temporary area. Choose a relatively flat and wide site for temporary facilities layout to meet the needs of construction life.

2. 12 Establishment of Site Laboratory

According to the needs of project implementation and the requirements of the supervisor, a small laboratory should be established at each bridge construction site, equipped with necessary test instruments and equipment to meet the needs of project quality inspection. For the testing items that cannot be undertaken by the site laboratory, according to the requirements of the supervisor, send them to the central laboratory of the company or the laboratory with corresponding testing qualifications in the city for testing.

2. 13 safety fire prevention facilities

In order to meet the needs of safe production, fire prevention equipment should be arranged at the same time when arranging production and living facilities. Layout of oil irrigation, warehouses, etc. It should be transported away from the living area. At the same time, fire extinguishers shall be placed at a specified distance in the work shed area, and large fire extinguishers and fire-fighting sand pools shall be set in important parts such as oil tanks, warehouses and electromechanical rooms.

Chapter III Construction Organization

3. 1 organization

Our company organizes the construction according to the requirements of "Project Law", deploys managers and business backbones with rich experience in bridge construction, and establishes "Project Management Department for Optimizing Agricultural Bridge Construction in Huaiyin District in 2005", and establishes a management team headed by the project manager to be responsible for the implementation of this project, closely cooperate with the owner, supervision engineer and design unit, and do a good job in construction organization and coordination. The project department consists of five functional departments: engineering department, quality inspection department, finance department, comprehensive department and material equipment department.

The project manager represents the enterprise as a legal person in this project and is the authorized representative of this project. Be responsible for the overall work of the whole project, implement project target management, and be fully responsible for the construction quality, safety, progress, efficiency and civilized construction of the project.

3.2 Organization chart (see attached table for details)

Chapter IV Resource Allocation Plan

4. 1 material supply

Our company set up a material supply team immediately after winning the bid, and selected suppliers with sufficient supply, good quality, good corporate reputation and strong strength to organize the supply. Each batch of materials must pass the quality inspection of the material quality inspector or the site laboratory and relevant testing units, and the unqualified materials must be resolutely recovered and shall not be used. According to the construction progress and construction intensity, the material mobilization plan will be prepared, and the materials mobilized will be transported to the site with good quality and quantity in time to ensure that the construction progress needs are met.

4.2 Equipment configuration

List of construction equipment:

4.3 Manpower allocation

Labor force measuring instrument

Chapter V General Construction Schedule

The bidding documents of this project stipulate that the total construction period is 90 calendar days. According to the structural characteristics of this project, combined with the construction experience of similar projects in the past and the current construction capacity of our company, the construction is carefully organized and standardized, and the project quality reaches the excellent grade standard of water conservancy and hydropower projects, so as to ensure that the construction of this contract project can be completed within the time limit stipulated in the contract.

If our company wins the bid, our company will organize machinery, personnel and materials to enter the site in accordance with the provisions of the bidding documents, start construction on the site on February 15, 2005, and complete all the quantities of this contract before March 15, 2006.

Chapter VI Project Construction Scheme

6. 1 The construction procedure of bridge engineering is as follows:

6.2 survey lofting

After entering the site, the plane control network and elevation control points provided by the owner shall be re-surveyed, and the control piles shall be led to the construction site after verification. Control piles should have good visibility, be free from construction interference, meet the measurement accuracy, be fixed and protected, and be submitted to the engineer for approval as the basis for construction control.

6.3 Plane control

According to the coordinates of control points, establish control network points at the construction site, draw coordinate network points, fix protection positioning piles after retest, and carry out retest regularly. If the positioning pile shows signs of displacement, it should be re-measured and corrected in time.

6.4 elevation control

Establish elevation control points for construction at appropriate positions at both ends of the bridge, and measure the elevation from the provided leveling points. The elevation control points should be located in places that are easy to access and visibility, and should be re-surveyed once a week.

6.5 Construction lofting

Before the formwork erection of reinforced concrete works, the vertical and horizontal axes and formwork lines of the structure should be set out to ensure the accuracy of the formwork erection and reinforcement position. During the construction period, the measuring and setting-out personnel shall make disclosure with the technicians of relevant types of work to ensure the accuracy of lofting.

6.6 Completion survey

After the completion of the project, carry out completion survey, including plane layout and elevation control points. , and compile it into completion data.

6.7 Personnel and equipment

Personnel: According to the needs of the project, the project intends to set up a survey and setting-out team, which is in charge of the engineering department and equipped with 2 survey engineers, 4 technicians and 2 surveyors.

Measuring instruments: 1 electronic total station, 1 DS3 level, and necessary tools such as ruler, flower pole and tape measure. All measuring instruments and testing equipment have been inspected and approved by the Bureau of Standards and Metrology.

6.8 substructure construction

50CM protective earthwork (manual excavation) shall be reserved for foundation pit excavation, and under excavation is strictly prohibited.

Slurry stone

[6] The daily laying height of masonry shall not exceed1.2m.

6.9 pier cap construction

After the pier concrete reaches 80% of the design strength, the concrete at the top of the pier can be chiseled manually, and the formwork support and reinforcement of the pier cap can be started. After the strength of the cast-in-place pile reaches 75%, the concrete at the pile head of the cast-in-place pile is manually removed to the design elevation, and the quality of the concrete in this section is good, so that the quality control of the pile body can be carried out, and the construction of the bearing platform can be started after passing the inspection.

1, pier cap construction

① Erection of formwork: First, set up the bottom formwork on the scaffold that has been set up. The bottom die is supported and reinforced by a mesh bracket to ensure firmness and no deformation. The bottom formwork shall be made of large steel formwork or bamboo veneer (bamboo veneer shall be reinforced with 10×5cm wood square spacing of 30cm).

(2) Pouring: After the self-inspection of reinforcement and formwork is qualified, it shall be reported to the supervision engineer for inspection. After the self-inspection is qualified, concrete shall be poured according to the concrete quasi-pouring certificate issued by the supervision engineer. .

2, pile cap construction

The original backfill soil is used to tamp the foundation for the bottom formwork of pile cap construction. The bottom formwork with a thickness of 5cm is made of low-grade concrete, and φ 16 opposite bolts are embedded in the bottom formwork, with the same size as the bottom slab of pile cap, and the top elevation is the bottom elevation of pile cap. Then steel bars are tied on it, and the formwork is erected. The ear wall, back wall and table cap of the table cap are constructed at the same time, and the ear wall and back wall are reinforced and supported by steel pipes.

6. 10 superstructure construction

1. Construction of fine stone concrete cushion for pier cap

The concrete adopts C25 grade fine stone concrete. Re-survey the center line and elevation of pier cap first, and handle the problems in time when found.

After the elevation and center line of pier cap meet the specification requirements, cut hair to wet the cushion stone at the top of pier cap, bind the steel mesh, and pour the supporting cushion stone as required. The surface of the supporting cushion stone must be smooth, and the difference between the top elevation and the design value is 2mm, so as to ensure the construction accuracy and quality, and strengthen the maintenance after construction.

2. Prefabrication of 2.C30 hollow slab beam

1), construction process

2), template production and installation process

Manufacture and molding of skeleton

Before fabrication of steel bars, the drawings should be carefully checked, and the joint position of steel bars should be determined in strict accordance with the requirements of technical specifications and the length of on-site materials. Joints can be welded or bound, and each main reinforcement should be numbered. Steel welding shall not be carried out in the template, so as not to burn the template. Flash butt welding or lap welding shall be adopted for welding joints of main reinforcement. And pay attention to stagger the joints according to the specifications. Welders must hold a work license and strictly implement the operation procedures to ensure the quality of welded joints and the covered electrode used meet the requirements of technical specifications.

4, concrete pouring, vibrating and curing

① Mixing and transportation

According to the approved ingredient list, all kinds of raw materials are sent to the mixer for mixing. The feeding sequence is yellow sand-cement (admixture)-crushed stone, and the mixing time is generally not less than 1 min (from the end of feeding to the beginning of discharging). Check whether the slump and workability of concrete meet the requirements after the clinker is discharged from the machine. See the following table for the slump of concrete at the pouring site:

Slump of concrete in pouring site (using vibrator)

Properties of building standard cyclic slump (cm)

Hydraulic plain concrete or less reinforced concrete 3-5

5-7% of reinforced concrete with reinforcement ratio not exceeding 1%

7 ~ 9 reinforced concrete with reinforcement ratio exceeding 1%

After the concrete is discharged from the machine, it will be transported to the pouring site by the motor dump truck.

Precast concrete for small components is used together with mixing.

② Concrete pouring

Concrete pouring shall be carried out in strict accordance with the specifications and the requirements of the supervision engineer.

③ Concrete vibrating

In the process of concrete pouring, if there is more bleeding on the surface, measures should be taken in time to reduce bleeding. Bleeding in the warehouse should be eliminated in time, and it is forbidden to open holes in the template for drainage, so as not to take away the mortar.

The concrete vibrator adopts 1.5KW plug-in vibrator and flat vibrator, and the surface concrete is leveled with flat vibrator, supplemented by manual leveling.

④ Concrete curing

Concrete curing adopts the method of combining covering water curing with film curing. The method of covering and watering can be used to expand the surface of foundation and bridge deck, that is, covering and watering the concrete surface with straw bags and other materials to keep the concrete moist for a certain period of time.

⑤ rainy season construction

During construction in rainy season, always measure the water content of coarse and fine aggregates, adjust the water consumption at any time, pay attention to the weather forecast, and try to avoid construction in rainy days. In the process of concrete transportation, the container and warehouse surface should be covered, and the drainage in the warehouse should be smooth to ensure the quality of concrete pouring.

⑥ Precast of concrete members

Precast concrete members mainly refer to precast railings and handrails in concrete precast yard. The concrete mixture ratio and concrete construction shall be implemented in accordance with the construction specifications and relevant regulations, and the dimensional deviation after molding shall meet the requirements of the Code for Acceptance of Reinforced Concrete Engineering Construction.

When precast concrete, precast and pile up according to different types of components. The precast formwork of each component is numbered and identified by letters, and the concrete pouring date is indicated on the precast component.

⑦ Batch lien

When pouring concrete, designate a person to be responsible for retaining the test block, and make pouring records. The fabrication and retention of concrete test blocks shall meet the requirements of relevant specifications and be sent to standard curing room for curing. After reaching the age, do a stress test.

(4) Matters needing attention in the process of concrete pouring

(1), in the process of concrete pouring, should be equipped with on-site command, pouring in strict accordance with the concrete pouring sequence in the construction plan.

(2), equipped with enough inspectors, at any time to monitor the harmful deformation of templates and stents, handle in time when problems are found.

(3), concrete pouring should be continuous, shall not be interrupted.

(4), in the process of pouring, to send special test personnel to check the slump of concrete at any time.

6. 1 1 C30 hollow slab beam installation

General requirements of 1

(1) When the beam and slab are demoulded, transported, stacked, hoisted and transported, the concrete strength shall not be lower than the hoisting strength required by the design.

(2) Check whether the supporting structure pier, capping beam and bearing pad of beam slab meet the installation requirements of beam slab.

(3) The beam and slab must be inspected before installation, and the allowable deviation of the overall dimensions and the position of embedded parts shall not exceed the design regulations.

(4) The installation and hoisting of beam and slab must comply with the technical regulations on safe operation.

⑤ The technical requirements for the use of lifting tools and equipment must meet the safety factor of lifting equipment.

2. The choice of bridge erecting machine

Choose bridging equipment according to the length, width and span of the bridge.

3 construction process

4. Transportation and installation of beams

Set up beam and slab transportation team, arrange experienced crane engineer to command, and use flat trailer to transport beam and slab. In the prefabrication yard, the beam slab is lifted by gantry crane, and the end of the beam slab is supported on the sleeper and fixed firmly with steel wire rope. Transport along the construction service road, and pay attention to protect the edges and corners of beam and slab during transportation. Because this project adopts double guide beam installation.

Precautions for beam and slab installation: Before installation, check the plane position, top surface elevation, surface flatness and geometric size of beam and slab, and clean the bearing surface and bottom bearing position.

During installation, keep both ends of the beam slab basically horizontal, and both ends basically contact the bearing at the same time. Installation must be careful to ensure that the beam and slab are in place accurately, the verticality meets the specification requirements, and the bottom of the beam and slab is in close contact with the bearing; Otherwise, it must be hoisted and reloaded, and it is forbidden to move the beam and slab with a crowbar.

Before installation, accurately control the elevation of the bearing and the position of the center line of the bearing, so that the bearing is evenly stressed and there is no vacancy phenomenon, the ends of the beam slab are neat, the joints of the beam slab are even and there is no dislocation phenomenon. Install in strict accordance with operating specifications to prevent damage to beam and slab, and pay attention to safety.

6. 12 C30 waterproof concrete bridge deck pavement

In order to combine the bridge deck pavement with the beam closely, the surface of the precast beam should be chiseled and cleaned before pouring the bridge deck concrete. In order to prevent the initial setting of the first layer of concrete, the length of steel mesh shall not exceed 8m. After the completion of the first piece of casting, 50cm long steel mesh should be reserved, and then the second piece of bottom concrete should be poured. Steel mesh and the first layer of steel mesh are bound and lapped to pour the upper concrete, and so on, and the bridge deck system is poured backwards. When pouring concrete for bridge deck pavement, pay attention to the accuracy of the geometric positions of expansion joints and embedded parts and the elevation control of concrete pavement, vibrate with a flat vibrator, and at the end of pouring, the artificial light mode will receive light. When the paving concrete reaches more than 75% of the design strength, anti-skid lines should be engraved on the bridge deck to ensure the smoothness of the paving concrete on the bridge deck to meet the quality requirements.

The abutment cap shall be constructed after the abutment back backfill is completed.

Chapter VII Construction Measures in Winter and Rainy Season

In order to ensure the timely completion of construction tasks, the following rainy season construction measures are formulated:

1, temporary engineering facilities shall meet the requirements of construction and production in rainy season, and waterproof, drainage and water collection shall be comprehensively considered, and all kinds of wet and wet equipment shall be protected against rain in advance.

2. Strengthen the weather forecast during construction, contact the local meteorological department in time and establish communication channels.

3. Prepare all kinds of materials for rainy season construction, and prepare all kinds of rain gear, shed cloth and waterproof materials in advance.

Chapter VIII Construction Quality, Duration and Safety Assurance Measures

8. 1 quality assurance measures

1) quality objectives

The quality goal of bridge engineering construction is "to build high-quality projects and ensure good quality". The quality of bridge engineering is directly related to people's life safety and the image of the whole enterprise. Therefore, in the process of bridge construction in this project, the construction goal is to establish excellent quality, organize elite soldiers and strong generals, carry out careful construction, and conscientiously implement our company's quality policy of "careful construction, quality assurance, strict management and striving for first-class". Ensure that:

(1), the first acceptance rate of the project 100%, and the excellent and good rate must be above 95%.

(2) Meet the requirements specified by the owner in the project contract.

(3) Be responsible for the basic quality of the project for life.

2) Guarantee measures

At present, our company is fully implementing GB/T 19002-ISO2000 quality management standard, and this project will operate in strict accordance with this quality assurance system to ensure that the whole process of construction and production is controlled. The quality management system implements three-level management. The first level is the quality controller of the specific operation team; The second level is the concrete implementation of the technical director of the construction team, who is responsible for the on-site supervision and inspection of the first-level management personnel and the collection, sorting and summary of indoor data, and is responsible for the filing of indoor data; The third level is the responsibility of the company's project manager and chief engineer, implemented by the quality inspection department, and supervised and inspected by the second-level management personnel.

(1) completion report and various management documents;

② Processing self-inspection sheet.

(3) Technical disclosure records and quality activity records

D, timely grasp the quality of each working procedure in the project, and organize relevant personnel to solve problems in time when found.

E, the lower-level management personnel of each process shall timely check and accept after passing the inspection, and rectify in time when problems are found.

F, cooperate with the operator to do a good job of sampling and inspection of raw materials.

G, hold the second quality activities every month, and make records of the activities, fill in the monthly quality report and various accounts, and submit them to the engineering department before the 28th of each month.

H, timely sort out the information in the industry reported by the first-level quality management personnel.

I, take part in pile driving, control point review and lofting review, and be responsible for the review of engineering leveling points. Responsible for all kinds of testing work in the project.

J, the secondary management system shall be the responsibility of the construction team and department heads, and implemented by the quality engineer.

(3), the third level management system:

A, responsible for the quality acceptance of the project.

B, once a month for the completed process quality inspection, and organize a quality activity.

G, the three-level quality management system shall be the responsibility of the chief engineer of the project department and implemented by the quality inspection department.

(4) Other requirements

A, the material department shall provide the material quality assurance certificate to the project department and the operator in time.

B, quality management personnel at all levels have the right to ask questions to the construction operators, requiring rectification. After the request is rejected, you can give feedback to the superior quality management personnel, find out the truth and give rewards.

C, raw material test by the operator, the material management department must provide the raw material quality guarantee in time. If the project is in urgent need of materials, it should inform the arrival time in advance.

D, raw material test must be consistent with the progress of the project, and it is not allowed to hold back the progress of the project.

E, raw material test report and quality assurance list, by the project department quality engineer unified collection, sorting, and timely make account and monthly report.

(5) From the beginning to the end, adhere to the plan to conduct total quality management education and training for all employees, so that all employees can firmly establish the ideology of quality first, firmly engrave the concept of "any neglected consciousness and behavior is a crime" in every employee's mind, and always think about the consistent goal of "striving for quality projects".

(6) Establish and improve the system of self-inspection, mutual inspection, special inspection and random inspection: self-inspection shall be carried out in each working procedure first, and unqualified products shall not be handed in; The post-order shall be rechecked with the pre-order, and the unqualified goods shall not be received; Raw materials, semi-finished products and finished products entering the site shall be specially inspected by quality inspectors, and unqualified products shall not be accepted; Leaders should often go deep into the site to conduct spot checks and never let go of existing problems. Do the combination of experts and groups, cadres and groups, quality first, prevention first, speak with data, blame people, carry out quality competitions, and link quality with economic distribution.

(7) Using modern management technology, all the collected data will be input into the computer, analyzed and processed by quality management software, and the trend of quality fluctuation and the order of influencing factors will be grasped, and countermeasures will be put forward in time to implement dynamic management of quality status.

8.2 time limit for a project guarantee measures

The bridge construction period of this project is abundant, but we still arrange the construction tasks in strict accordance with the compact construction scheme, strive to be efficient in time, and complete the construction tasks as soon as possible under the conditions of high quality and efficiency. See attached table for detailed construction progress plan.

1) Organize a "lean, efficient and authoritative" project management department to effectively strengthen the leadership and organizational management of the project.

2) Increase investment and act immediately.

(1), act immediately, enter the site quickly, ensure that the equipment, personnel and funds are in place, carry out the preparations for each roof in an orderly manner, complete the construction of the compound and the construction access road within a time limit, and dispatch enough construction machinery and equipment and measuring, testing and testing equipment to arrive as soon as possible to meet the needs of the construction progress, provide the first batch of working faces as soon as possible, and make the main project start as soon as possible.

(2) Organize experienced personnel to make further on-the-spot investigation, carefully compile feasible construction organization design, strive to optimize various construction schemes, comprehensively estimate various impacts, and do a good job in communication with the owner, supervisor and material suppliers of design units, so as to make the construction organization design more scientific and practical, with strong operability and adaptability, and effectively guide the construction.

3) ask for benefits from science and technology.

(1), citing advanced computer management software, dynamically manage the project, draw a network management diagram, find out the weak links and key routes of production in time, centrally schedule, flexibly arrange, adjust the plan in time, and put forward necessary countermeasures to ensure the realization of the construction period.

(2), establish a reasonable process, plan, make the construction of each division subdivisional work organically linked, interlocking, coordinate the progress, the previous process as far as possible to create favorable construction conditions for the next process, and provide working face and convenient conditions as soon as possible.

(3), specific projects strive to promote new technologies, new processes, new materials, new equipment, improve production efficiency and shorten production cycle.

(4) Use the flow method to maximize the role of the professional construction team.

(5), strengthen equipment maintenance, ensure the intact rate and utilization rate, the responsibility to the people, to ensure that the construction is not delayed.

4) Establish an effective management system to benefit from management.

(1), establish a strict time limit for a project responsibility system: under the premise of ensuring the quality, the task completion is directly linked to the distribution, and it is decomposed and implemented layer by layer. Those who overfulfill will be rewarded, those who fail to complete the plan will be punished, and they will be cashed in the current month. Ensure ZuoYeDui by team, project management department by ZuoYeDui, and contract project by single project.

(2), establish a system of ten-day newspaper, with ten-day newspaper monthly, with monthly total duration.

(3), the functional management departments clear responsibility, written pledge to fulfill a military order, to do a good job in the protection of this function, to ensure that the project is not blocked by this function is not effective, to ensure the comprehensive work of functional departments.

5) Strengthen the coordination of external environment.

Strengthen contact and communication with owners, supervision engineers, designers' representatives, local township governments and village committees, and residents near the residence, properly solve some possible contradictions in time, avoid interference from environmental conditions, and ensure the normal progress of the project.

8.3 Establish and improve the safety management organization.

Set up a safety leading group with the branch manager as the team leader, the deputy manager and the head of the security department as the deputy team leader, and the captains of all construction teams as the team members. All functional departments and professional teams will determine full-time safety officers, who will be fully responsible for safety management, and the responsibility will be implemented to people, so that safety work will be managed by someone. Establish a clear safety goal: adhere to the policy of "safety first, prevention first, education first, system guarantee", resolutely put an end to man-made major casualty accidents, and control the annual injury rate within five thousandths.

1) Establish an effective set of safety assurance rules and regulations.

(1), each professional type of work must be combined with the type of work and the terrain characteristics of the construction site, strengthen pre-job training, systematically master relevant safety knowledge, and hold relevant certificates after passing the examination.

(2) Take every opportunity to carry out general safety education, so as to improve employees' understanding of natural disasters and their ability to cope with dangerous situations.

3) Strengthen the material guarantee of safety work.

(1), operators under special circumstances must distribute relevant labor protection articles, such as safety helmet, safety belt and anti-slip work shoes.

(2) When working high above the ground, a safety net should be set up and the safety of scaffolding should be strictly checked.

(3), regular physical examination of construction personnel, personnel who are not suitable for aerial work should be replaced in time, and operators engaged in special conditions should be given nutritional subsidies to keep healthy.

Chapter 9, Civilized Construction

In order to do a good job in civilized construction, our company promises to do the following:

1, strengthen team management, the project manager and main management personnel are listed for posts, the construction personnel maintain a good mental outlook, and the construction personnel cooperate with ropes to ensure that they do not quarrel, gamble or drink too much.

2, strengthen the management of the construction site, the construction site layout is reasonable, no scattered phenomenon, materials neatly stacked, clear signs, clear after work, garbage cleaning and stacking at any time, the construction area and temporary facilities clean and tidy.

Chapter X, Environmental Protection

In the construction of our project department, we will strictly abide by the relevant environmental protection laws and regulations stipulated by the state, do a good job in environmental protection, and resolutely do:

1, plants, trees and buildings outside the construction boundary will not be damaged, and slopes excavated at the construction site will be protected to prevent soil erosion.

2, according to the relevant national and local environmental laws and regulations, control the construction noise, dust and toxic gases, to ensure the workers' labor hygiene conditions; For construction machinery with high noise, try not to arrange construction at night, so as not to affect residents' rest; The approach roads are often watered for maintenance to avoid dust flying and polluting the surrounding environment.

3. Don't pollute the land and rivers with harmful substances (such as fuel, oil, chemicals, acid, etc.). ) and take effective measures to prevent drinking water from being polluted.

4. Maintain the environmental sanitation inside and outside the construction area, clean up the garbage in time, and transport it to the designated place for burial and incineration.

5. Set enough temporary sanitary facilities in the construction area and living area, and clean them regularly.

6. The construction waste residue shall be sent to the place designated by the owner to prevent the riverbed from scouring or silting.

7. After the completion of the project, dismantle the temporary production and living facilities in time and restore the original state before construction.