What about the rainy landslide? What are the solutions?

Discussion on construction of manual digging pile

Manual digging pile has the advantages of simple mechanical equipment, convenient construction operation, small occupied space, no mud discharge, little impact on the surrounding environment and buildings, reliable construction quality, comprehensive construction, shortened construction period and low cost, and has been widely used in recent years, especially in the construction of enlarged pile foundation. It can make up for some shortcomings of mechanical construction. The author talks about the construction of manual digging pile foundation in the construction of communication tower of a water conservancy project. 1. General situation of the project: The microwave communication tower adopts rigid frame structure with a height of 75m, and the foundation adopts four manual digging piles, which are connected with the cap beam structure at the ground elevation. The main design parameters are: pile length 6.8 m, upper length 4. 1 m, inner diameter 1 m (excluding concrete retaining wall thickness 0. 1 ~ 0.2 m), lower length 2.7 m and enlarged head diameter 2.8 m (excluding concrete retaining wall). A reinforcing cage with the main reinforcement of 16φ 18 is set in the pile. The pile cap1.4m×1.4m×1.2m (high) is set on the upper part of the pile, and the finished anchor bolts are embedded and connected with the tower, and the concrete grade is C20. The project started construction in June 2002 and was completed that month. 2. The preparation before construction is 2. 1. Summary of joint examination of pile foundation construction drawing; Underground pipeline (pipeline) data on the construction site; Technical performance data of main construction machinery and its supporting equipment; Construction organization design or construction scheme of pile foundation and quality inspection report of building materials (cement, sand and gravel, steel bar) used for pile foundation reinforced concrete. 2.2 Detailed quality management measures shall be formulated before construction. The construction plan shall indicate the pile location, pile number, construction sequence, water and electricity lines and temporary facilities; Specify the inspection procedures of construction procedures; Formulate technical measures for construction in bad weather (rainy season). 2.3 Safety measures in manual digging pile construction are very important, and the construction unit must attach great importance to them. The following measures should be taken to ensure that: (1) an emergency ladder is set in the well for personnel to go up and down the well; Construction personnel must wear safety helmets when entering the hole; Use of hanging cages, electric hoists, etc. There should be a safe and reliable automatic clamping safety device; When the excavation depth exceeds 10m, ventilation equipment shall be provided; The excavated earth and stone shall be transported away from the orifice in time, and shall not be piled up around the orifice 1m, and the passage of motor vehicles shall not cause safety impact on the shaft wall; Pay attention to safe use of electricity. Safety lights below 12V should be used for underground lighting. 3. Construction technology 3. 1 manual excavation construction 3. 1. 1 Before excavation, the site should be leveled, the surface soft soil layer and all sundries should be removed, the control network should be laid out, and the position of each hole pile should be determined by the cross method according to the position of the pile foundation retested by the supervisor. A positioning gantry pile is arranged outside the pile position. 3. 1.2 Set out the excavation line on the ground according to the designed pile diameter and the thickness of the retaining wall, then dig down to the depth of 1m, and pour the retaining wall of the first section of the concrete well circle. The well circle should be 20cm higher than the ground, and it should be thickened by 10cm. Then measure the vertical and horizontal center line of the pile position on the well circle, and measure the control elevation of the orifice, so as to facilitate the lower excavation. The deviation between the center line of the first well circle and the design axis is required to be no more than 2 cm. The well circle is higher than the ground, which is also beneficial to prevent surface water from entering the well during construction. 3. 1.3 When building a reinforced concrete well ring, the strength of reinforcement and concrete pouring of the retaining wall shall be ensured. The overlapping length of upper and lower retaining walls shall not be less than 5cm, and each retaining wall shall be removed after 24 hours of maintenance on the same day. When honeycomb and water leakage are found in the retaining wall, it should be reinforced in time to prevent accidents. The retaining wall of this project was originally designed as C 10 plain concrete with a thickness of 0.1~ 0.2 m. Considering the low design strength, C20 plain concrete was used in the construction, so that the formwork removal strength can reach more than 3mpa after 24 hours (daily average temperature 15 degrees or more). And the safety factor of the building is increased. 3. 1.4 When excavating the earthwork in the second section of borehole, firstly use messenger wire to find the borehole center from the wellhead, put a short pile at the bottom of the borehole, and project the pile center on the top of the pile as the basis for the earthwork excavation of the second section of retaining wall. During excavation, we should pay close attention to the change of geological conditions. 3. 1.5 Repeat the above process to complete the excavation and retaining wall work. Until the pile bottom design elevation. In the process of construction, each retaining wall should be regarded as an acceptance step, and the excavation of the next section can only be carried out after it is qualified. When the hole is dug to the design elevation, there should be no water at the bottom of the hole, and the slag at the breast wall and the bottom of the hole should be cleaned up after the completion of the final hole, and the next concrete can be poured only after it is qualified. The characteristic of manual digging pile in this project is the construction of enlarged head at the lower part, and the construction at the upper part is the same as other digging piles. 35438+0.6 However, when excavating the lower part of the pile, special attention should be paid to the excavation progress and construction safety, because the enlarged head at the lower part of the pile is 2.7 m high and 2.8 m in diameter, and the hole wall is in an inverted slope, and there is no concrete retaining wall. After the enlarged head is completed, the procedures of slag cleaning, acceptance and concrete pouring are compact, which can reduce the probability of soil collapse. During the construction, full-time technicians are also arranged to supervise the geological conditions of the excavated soil layer, and personnel are equipped to climb the ladder in case of emergency. Abnormal situations can be handled in time to ensure construction safety. Due to the accurate geological exploration in the early stage of this project, the designed excavation section is reasonable and there is no earth collapse. 3.2 After the hole is formed, concrete shall be poured in time. The processing, fabrication and installation of reinforcing cage, concrete pouring and pile head treatment are the same as those of other conventional cast-in-place piles, so I won't repeat them here. When pouring concrete, we can only use collusion, cut in from one side of the pile and spread it manually. When there is groundwater, the conduit can be used for underwater concrete pouring. The concrete pouring of this project is characterized by the pouring of the upper bearing platform of the pile. Because there are tower foot pads and embedded parts of anchor bolts on the bearing platform, it is necessary to correct the relative position of each pile and embedded parts with the pile center again during concrete pouring to avoid unnecessary rework. 3.3 Quality inspection of finished piles During construction, we require that each finished pile should have a steel bar processing inspection record. Quality records of concrete mixture, data of concrete test block, and integrity test data of pile body. Because the pile of this project belongs to uplift pile, no bearing capacity test has been carried out. Through the analysis of relevant test data, it is proved that the construction quality of digging piles in this project is excellent. When the groundwater level is high, multiple piles can be pumped at the same time to reduce groundwater; If the design depth of the pile is not large, well point drainage can be considered around the site. 4.2 quicksand layer problem. When manual digging piles are excavated, it is easy to form quicksand if they encounter fine sand and silt geology, coupled with the action of groundwater, and in serious cases, well leakage will occur, resulting in quality and safety accidents. Therefore, effective and reliable measures should be taken. When the quicksand is light, the excavation depth can be shortened, and the normal section of about 1 m will be changed to 0. When the sand production situation is serious, the method of lowering the steel casing is usually adopted. The steel sleeve is similar to the steel formwork, and is divided into 4-6 arcs with the diameter of the aperture. 4.3 When encountering muddy soil layer, wooden formwork can be generally used to support the file, so as to shorten the excavation depth and timely accept the pouring concrete retaining wall. In a word, when encountering unfavorable geological conditions in the construction of manual digging piles, in addition to formulating single pile construction measures, the construction sequence of manual digging piles should be arranged reasonably, which plays an important role in reducing the construction difficulty. When making the construction plan, comprehensive analysis should be made according to the actual situation and overall arrangement should be made. If possible, the shallow pile shall be constructed first, then the deep pile, then the peripheral pile (or the water-facing part) and then the middle pile. 5. Conclusion Through the construction of this project, the author thinks that the advantages of manual digging pile are obvious. Manual digging piles can be widely used not only in places with good geological conditions, but also in groundwater, quicksand layer and muddy soil with the improvement of construction technology. Objectively speaking, manual digging piles can give full play to their advantages when used in foundations with good geological conditions. When manual digging pile with enlarged head is used in poor foundation, its enlarged head is easy to collapse, causing quality and safety accidents, so it should be used with caution. Therefore, when designing the pile foundation, we must pay attention to the geological exploration data, and in the case of poor geological conditions, other pile foundation types should be used for design and construction.

Further reading: (including rainy season construction measures) 1. /view/5 DDC 792 fed 630 b 1 c 59 eeb 53 f . html 2 ./view/ba 4 fa F3 e 09 12a 2 16 1479292 e . html。

References:

Case study on the implementation of manual digging pile construction scheme

It is inevitable for builders engaged in engineering to have a deep understanding and flexible grasp of the construction scheme. Therefore, for different projects encountered in different stages of the construction process, there must be detailed scheme implementation, such as the implementation of the builder-manual digging pile construction scheme introduced today.

I. Overview of the Project

1. Project Overview The project site is located at # # # # # # # # # #, and some foundation types of this project adopt reinforced concrete retaining wall manually dug cast-in-place piles. The whole project has *** 19 piles. The plane layout is A/ 1-3 axis, B/ 1 axis, 17- 19/A-C, 18- 19/D axis,/kloc-0. In addition to the above-mentioned pile diameters, the pile diameters of the foundation of axis B/17- 18, pile C/17- 18 and pile D/18 are1.4m..

2. Engineering design. Geological Survey The engineering geological survey task is completed by # # # Surveying and Mapping Research Institute. The survey results show that the stratum structure of the proposed site is simple and the sequence is clear, which can be divided into:

1 layer: gravel plain fill.

Layer 2: silty clay, with foundation bearing capacity fk= 180-220kpa. Layer 3: silty clay, with foundation bearing capacity Fk= 120- 160kpa. Layer 4: Silty clay, with foundation bearing capacity Fk=200-260kpa.

Commencement date: August 2002 13 Completion date: August 28, 2002 Calendar duration: 15 days.

Second, the construction preparation:

1 site preparation

1. 1 Know the location and maximum available amount of water and power, and need power 100KW. Before construction, arrange the route, distribution box, mechanical placement, etc. The temporary electricity consumption on the construction site meets the specifications and safety requirements;

1.2 requires the owner to disclose underground obstacles and pipelines;

1.3 According to the requirements of Qingdao Construction Committee, the "two types" and "five types" were carried out on the construction site.

2 technical preparation

2. 1 establish a technical management system with the project manager and technical director as the core and sub-departments such as construction technology, quality, materials, data and planning.

2.2 review the construction drawings, put forward reasonable suggestions, and obtain the consent of the construction unit and the design unit, so as to achieve the purpose of saving investment, speeding up the progress, ensuring the construction quality and simplicity, and put forward reasonable drawings review opinions.

2.3 Prepare the construction scheme of pile foundation division and technical disclosure of subdivisional work.

2.4 Establish and improve the information and data file system.

2.5 Prepare plans for materials such as steel, cement and wood. , and prepare the corresponding material test plan to guide the ordering, supply and technical control of materials.

2.6 Arrange mechanical equipment and turnover tools to enter the site according to the resource plan, and go through the corresponding formalities.

2.7 Establish and improve the quality assurance system.

2.8 In conjunction with the planning, survey and design, construction units, contracting units, quality supervision units and other departments, review the fixed-point coordinates, building elevation and basic inspection.

2.9 Do a good job in technical and safety disclosure of team members. Before starting work, we must emphasize labor discipline, make technical disclosure to the workers' team, learn drawings and relevant construction specifications, master the construction sequence, and implement technical measures to ensure work quality and safety in production.

3 mechanical equipment preparation

3. 1 Mechanical equipment should be well maintained before entering the site to ensure the mechanical integrity of the equipment;

3.2 The equipment to be invested in this project is:

Serial Number Machine Name Unit Quantity Remarks

1 350 concrete mixing mobile platform 1 mandatory

2 Welding machine platform 2

3 Air compressor platform 2

4 steel bar cutter 1

5 Plug-in vibrator Table 3

6 Submersible pump platform 20 water distribution belt

7 power distribution facilities 1

8 lighting facilities, 1 complete soil borrowing tools.

9 Manual Winch Table 20

10 trolley workbench 10

1 1 picking list 10

12 Reinforcing cage clamp sleeve 3

13 template set 50

Third, the construction organization and management

1 construction organization project management team formation: according to the construction principle and engineering characteristics of the project method, the project management department was established at the construction site. Under the leadership of the company, the project manager will set up functional organizations such as engineering technology, quality, safety, budget and materials according to the needs of the project, and be equipped with corresponding functional personnel to manage the project.

Construction organization is an important part of project management and the key to achieving project objectives. The construction organization should be coordinated with the plan management, and the construction personnel should implement the work situation of the day, arrange the work content of tomorrow, make full use of mechanical equipment and turnover materials, and allocate the labor force scientifically and reasonably.

The organizational structure of the Project Management Department is as follows:

According to the characteristics of the project and the needs of each stage, the project manager department of the labor organization will select and supplement skilled, hard-working and professional personnel in time.

The whole labor arrangement should make full use of the working face, and every working procedure should not be short of people.

Fourth, the construction scheme:

1 survey setting-out and elevation control;

The horizontal position of the pile well is determined by the method of theodolite guidance and repeated ranging with steel ruler. For elevation measurement, the Owner shall provide the datum point, measure the wellhead elevation of each pile hole with a level, and mark the elevation point on the wellhead wall as the basis for determining the elevation of the pile top during construction.

2. Construction direction and construction sequence: According to Party A's requirements, each team will carry out construction at the same time, and concrete wall protection method will be adopted to organize flow construction.

3. The diameter and length of reinforcing bars of reinforcing cage are determined by design and calculation. Production requirements shall meet the following requirements:

3. 1 The fabrication, transportation and installation of reinforcing cage shall be provided with measures to prevent deformation. The main measure is to weld the spiral stirrup firmly with spot welding, because spot welding will not hurt the main reinforcement.

3.2 The net protective layer of the main reinforcement of the reinforcing cage should not be less than 50mm, and its allowable deviation is 20mm；; ┨┩┫

3.3 When the reinforcing cage is hoisted into the hole, it shall not collide with the hole wall. When pouring concrete, measures should be taken to fix the position of the reinforcing cage. Φ 8 rebar earrings shall be arranged at three points of the pile to ensure the position of concrete protective layer and rebar, and the periphery of the pile top shall be bound and fixed with φ 16 rebar.

3.4 The allowable deviation of reinforcing cage production meets the following table:

Allowable deviation of reinforcing cage fabrication (mm)

Allowable deviation item by item

1 main reinforcement spacing 10

2 stirrup spacing or pitch plus or minus 20

3 reinforcing cage diameter 10

4 reinforcement cage length 100

4 manual excavation:

After measuring and setting-out, determine the center position of the pile hole, and start the pile hole construction after recheck and confirmation. Before construction, the brick with the height of 150-200 is used as the external formwork of the retaining wall, the first retaining wall is poured, the top surface of the retaining wall is leveled and calendered, and the control core line is copied out on the top surface of the retaining wall in time. The elevation will be copied and measured inside the retaining wall and marked with a red triangle. The pile will be excavated by hand winch. Under good soil conditions, the height of pile hole is usually about 100cm. After the earthwork excavation of the pile hole, concrete wall protection shall be carried out. When the hole collapses in the miscellaneous fill layer, the steel casing is used for digging piles.

The excavation is carried out layer by layer by hand with picks and shovels from top to bottom. When encountering hard soil or large pieces of garbage, chisel it with hammer or hand, and then carry it out of the hole. The boulder was broken into small pieces by masons and carried out of the cave. Pile hole construction adopts air compressor and pneumatic pick. If the rock at the bottom of the pile is too hard for the pneumatic pick to construct, a rock drill should be used for density drilling, and the boulder should be treated with net blasting agent or blasted to meet the design requirements.

4. 1 If it is a large stone transported vertically, it can only be transported after installation.

4.2 The excavated soil shall be laid 2 meters away from the orifice. The wellhead of each hole is made of brick, which is 30cm higher than the natural ground, and is used as the maintenance structure of soil piling. Surface mortar should be polished, and the cross center line and elevation should be marked. Check whether the center point deviates every meter footage.

4.3 Dewatering measures: In case of groundwater during construction, there is no confined water. The dewatering measures of this project are as follows: The first one is to pump water directly to the pile hole by submersible pump, and dig a sump to remove stagnant water. In order to use the pumps safely, each pump is equipped with a leakage protector, which will automatically trip if it is abnormal. The second is to use light well points for precipitation, so that the surface water level drops at the same time to achieve the purpose of precipitation.

During construction, drainage should be far away from the construction site to prevent water from flowing back into the hole, and dams should be set around the dug foundation pit to prevent rainwater from pouring into the foundation pit.

4.4 In the process of retaining wall construction, if the retaining wall shows signs of toppling, lateral support measures should be taken.

4.5 In case of quicksand, after research with Party A, steel casing will be used to protect the wall. When digging to the designed bearing layer elevation, the construction, supervision, geological department and design unit shall be informed in time to find out the rock (soil) at the bottom of the hole.

The allowable deviation in the construction of cast-in-place concrete retaining wall with digging piles is as follows:

Deviation of pile diameter (mm)| Allowable deviation of verticality (%) Allowable deviation of pile position (mm) |+50 < 0.5 50 5 Concrete mixing and quality inspection shall be carried out according to the specification requirements, and the mixing time for each tank shall not be less than 65438 0 minutes. During the construction, the materials shall be fed in strict accordance with the requirements of mixture ratio to ensure the quality of concrete mixing.

When the first batch of concrete is discharged from each machine-team, samples should be taken to check the workability, slump and mixture ratio. Each machine-team will make a set of concrete test blocks to test the quality of concrete, and then they will be naturally cured at the scene after formwork removal. Before pouring concrete, the bottom cleaning and slag cleaning shall be carried out for the last time. The site management personnel of the construction party shall check the quality of reinforcing cage, pile body and slag cleaning, and concrete can be poured only after passing the inspection. Direct grouting technology with large slump should be adopted. The concrete mixture ratio is provided by the laboratory. During grouting, a single pile is continuously poured into a pile. In order to ensure the compactness of the concrete at the bottom of the pile, when the pouring height of concrete reaches 800mm, a special person should go into the well to vibrate, first vibrating the periphery of the pile, and then vibrating the center of the pile.

5. 1 The concrete pouring of pile foundation shall be controlled according to the design elevation of +30mm, and the surface laitance shall be removed after the initial setting of concrete.

5.2 When pouring pile foundation concrete, the pile foundation wall shall be removed according to the elevation of cushion under the designed nuclear bearing platform.

6. The forming process is set as anchor pile → excavation of pile well, wall protection → bottom inspection → hanging reinforcement cage → slag removal → pouring concrete to form pile.

Make construction records and record the progress of each pile in detail every day.

After the completion of pile foundation construction, each pile should be tested by a statutory testing institution, and the test results must meet the design requirements.

V. Material Plan Name Gauge The length of the prepared reinforced pile is measured in m, and the reinforced bar used in the sand and gravel in cement must be sent to the laboratory of the construction engineering quality supervision station for physical rationality and welding inspection. Cement, sand, stone and other stacking sites shall be sampled and sent to the laboratory of quality inspection station for raw material inspection, and the laboratory shall provide concrete trial mix ratio.

Six, the construction quality assurance measures quality assurance measures:

1 Before digging a hole, accurately locate the lofting pile position, and set positioning gantry piles outside the pile position. The location must be approved by the pile center, and the person in charge will be responsible.

2. When constructing the retaining wall of the well circle, each retaining wall shall be continuously poured on the same day. The lap length of upper and lower retaining walls shall not be less than 5 cm; Retaining wall concrete must be dense; According to the situation of soil leakage, use accelerator; The removal of retaining wall formwork shall be carried out after 24 hours; When honeycomb and water leakage are found in the retaining wall, it should be reinforced in time to prevent accidents.

3 When local or flowing silt with a thickness of less than 1.5m is encountered, and sand gushing may occur, the height of each retaining wall may be reduced to 30-50cm, and it shall be inspected with excavation and concrete pouring; When quicksand is serious, light well point dewatering is used.

4 when digging to the design elevation, there should be no water at the bottom of the hole. After the final hole, the mud and residue at the bottom of the hole should be cleaned, and then the concealed works should be accepted. After acceptance, the back cover and concrete of cast-in-place pile body shall be immediately sealed. A set of test blocks must be reserved for pile concrete every 50 cubic meters. Each pile should have at least 1 test block, and each pouring machine-team should have at least 1 group, with 3 in each group.

Seven, safe production, civilized construction seriously implement the safety management policy of prevention first and key control. Safety must be managed in production. When working, the staff must wear safety helmet correctly and carefully check whether the winch is stable before entering the well. If there is any abnormality around the wellhead, it must be reported to the site management immediately. No entry into the well.

Clear warning signs should be set around the construction site, and the relevant regulations of Qingdao should be strictly implemented. Establish a safety production duty system with production management as the main task, and set up two full-time security officers on site to supervise and inspect every day. If hidden dangers are found and eliminated, the responsible project manager should pay attention to safety. A safety construction log should be established, and employees must be educated about safety in production before entering the construction site. Safety disclosure must be carried out at the same time as technical disclosure, and safety production inspection shall be carried out regularly or irregularly. The safety management objectives of this project should be formulated and managed according to the management by objectives method.

Specific precautions are as follows:

1 Before the joint review of construction drawings and pile hole excavation, carefully study the geological data, pay attention to possible quicksand, piping, water gushing and harmful gases, and formulate targeted protective measures. Before going into the well every day, use an air compressor to blow air into the well to eliminate toxic gases and avoid the danger of hypoxia after the excavator goes into the well.

Staff should abide by the following provisions:

1. 1 Safety helmet and insulating rubber shoes must be worn;

1.2 It is forbidden to work after drinking, to smoke in the foundation pit and to use naked flame in the foundation pit;

1.3 rotate the holes every 4 hours, and the rotation shall be arranged by the person in charge at the site;

1.4 orifice cooperation personnel should concentrate on closely monitoring the situation in the hole, actively cooperate with the personnel in the hole, and shall not leave their posts without permission.

2 Safe use of electricity

2. 1 Construction power wiring must be reasonable and effective;

2.2 construction distribution box must be installed with leakage protector, and it is forbidden to use one brake for multiple purposes;

2.3 The site is equipped with full-time electricians to manage electricity consumption.

Strictly follow the relevant regulations to ensure safe and civilized construction.

Implement the safety target responsibility system, take responsibility at different levels, implement various systems, assign responsibilities to people, and reward and punish people.

Strengthen safety education, do a good job in site safety publicity, hang safety signs on site, and implement safety supervision in cross construction.

Make full use of the "three treasures" and don't enter the site without wearing a helmet.

7. Do a good job in general layout planning and management, set up mechanical sheds for fixed-point towers, pile materials at fixed points, stack them, and keep the site clean and the roads clear.

Do a good job in the safety management of construction electricity and temporary electricity.

9. Retaining wall safety management: Two full-time retaining wall safety administrators are equipped on site to be responsible for the safety inspection of the upper retaining wall and the gas situation at the bottom of the hole during the next excavation. If the retaining wall is found to be loose, deformed, slipping, lack of oxygen or toxic gas at the bottom of the hole, it is forbidden for operators to go down to the well for construction.

Earthwork excavated at 10 shall be transported away from the orifice in time, and shall not be piled up around the orifice 1m, and the safety of the shaft wall shall not be affected by the passage of motor vehicles.

1 1 assign special personnel to guard the construction site. Idle people are strictly forbidden to enter the surrounding area. In unattended boreholes, manhole covers should be added and warning signs should be set to prevent people from falling into the boreholes.

12 After digging a hole, the wall must be protected in time, and bare holes are not allowed.

13 construction management during construction, in order to ensure the engineering quality, rainy season construction measures should be considered. The construction unit shall, jointly with the design unit and the engineering supervision unit, review the construction measures in rainy season and earnestly implement the approved measures.

13. 1 Establish a rainy season duty system, establish a cooperative relationship with the meteorological department, designate technicians to listen to and record the weather forecast, and organize patrol in flood season in time.

13.2 Tools and materials shall be properly kept. Hardware, electrical appliances, bagged cement and wood components should be stored in the warehouse. Floor materials should be placed in high places to prevent water erosion. Reinforcement and formwork shall be piled up overhead.

13.3 do a good job in the maintenance and reinforcement of temporary houses to prevent damage caused by typhoons and rainstorms.

13.4 repair roads and drainage facilities, make the subgrade solid and the road surface smooth, and ensure the smooth flow of roads and drainage pipes, without water leakage, sinking or water accumulation after rain.

13.5 All mechanical sheds shall be erected in good condition to prevent rain leakage. Mechanical and electrical equipment should be rain-proof and flood-proof, and grounding safety devices should be installed. The leakage protection device of electromechanical brake box should be sensitive and reliable.

13.6 windproof measures shall be taken, and the temporary work shed shall be fortified with wind support. The protection device should be sensitive and reliable.

13.7 prepare rain gear, shed cloth, plastic cloth, water pump and other equipment for standby.

13.8 when it rains heavily, it is not allowed to water in the open air, and the newly watered ones should be covered immediately.

13.9 Measure the water content of sand and gravel at any time and adjust the mixture ratio in time.

13. 10 set up an emergency team on the construction site, headed by the project department manager, and posted the emergency telephone numbers of various departments in the city (Safety Supervision Department of the Construction Committee, Safety Supervision Bureau, Safety Supervision Department of the Labor Bureau, Public Security Bureau, supervision and construction unit) on the office wall for timely notification.

13. 1 1 Before construction, workers should be trained in first aid measures and self-help methods for the injured.

Eight, the construction force deployment and construction progress plan

In order to complete the task with high quality and high efficiency, 1 must fully deploy the construction force and strictly control the quality of each process.

2 The site organization is as follows: 1 project manager; Technical director1; 2 construction workers; Accounting1; Reinforcing cage production group 6 people; Pile digging team *** 15; Logistics 2 people; Concrete pouring 10 person; 3 security officers; Electrician 1 person.

3 construction progress:

Complete the construction task according to the time limit required by Party A, that is, from August 3, 2002 to August 28, 2002. In case of obstacles, the construction period will be postponed with the visa of Party A..