Winter construction scheme of fire retardant coatings

Fire-retardant and aging-resistant coatings will expand to form a sponge-like foam layer when exposed to fire or heat, which has excellent heat insulation performance, thus reducing the heating rate of steel structures. The following is the winter construction scheme of fire retardant coatings I have compiled. Welcome to reading.

I. Comprehensive explanation

1. 1 project overview

* * The fire retardant coating project of steel grid of Olympic Sports Center is located in * * City, Jiangsu Province. The fire resistance rating of the stadium in this project is Grade I, the fire resistance time of steel grid is 1.5 hours, and the fire resistance time of steel purlin is 1.0 hours. According to the fire protection design specification and Party A's requirements, (refer to the drawingNo. GS-T5 General Description of Steel Structure Design of Stadium Roof) for fire resistance time.

1.2 compilation basis

1, Code for Fire Protection Design of Buildings (GB500 16—2006) 2, Technical Code for Application of Fire-retardant Coatings for Steel Structures (CECS 24: 90) 3, Fire-retardant Coatings for Steel Structures (GB 14907—2002) 4.

Second, the construction scheme

2. 1 Preparation before construction

2. 1. 1 set up the engineering headquarters, and the project manager will be responsible for the overall work of technical management, safety production and material management, and the project intends to.

2. 1.2 Technical disclosure of construction shall be conducted by competent technicians, including construction and installation scheme, operation procedures, safety measures, process requirements, quality assurance conditions, etc.

2. 1.3 Conduct safety education, formulate safety rules and regulations, and strictly implement safety production and civilized construction.

2. 1.4 according to the needs of work, organize manpower to build scaffolding workbench that meets the specified requirements.

2. 1.5 Organize the on-site layout of paints, painting tools (roller brushes or spray guns) and equipment, and whether the horizontal and vertical transportation meets the requirements.

2. 1.6 Implement the work of production, accommodation and electricity consumption, and set up a material storage room.

2. 1.7 construction period: after receiving the commencement order. According to the existing workload, the construction period is planned to be completed within 62 effective working days. Or meet the progress requirements of the project site.

In order to ensure the timely completion of the project, the organization and coordination of the project is the focus of the project construction management. Our principle: everything should focus on the overall situation and ensure that the project is completed on time and in quality.

2. 1.8 project quality: perfection is our common goal and our top priority in this project. Our goal is to ensure the excellent quality level of painting engineering.

2. 1.9 construction difficulties

The project involves many construction units, with large construction area and tight construction period. Ensuring the quality of steel base surface is the difficulty of this project.

Our goal is to take all measures to ensure the quality of steel frame painting is qualified. 2.2 Labor arrangement

2.2. 1 Due to the tight schedule and high requirements of this project, higher requirements are put forward for the timely entry and training of construction personnel, and targeted training should be conducted for all personnel involved in the construction. Labor arrangement is trained by the engineering department to ensure that all personnel can be in place in time during the construction of this project.

2.2.2 The management coordinator, main departments and responsible persons shall be implemented according to the overall deployment and post responsibilities, which shall be specifically controlled by the on-site project team. 2.2.3 Labor arrangement and reasonable organization

According to the overall labor arrangement on site, personnel can be flexibly arranged according to whether the site meets the construction conditions. Due to the different working procedures in each construction section, the number of construction personnel will increase or decrease according to the actual situation on site.

Three. Technical organization and quality assurance measures

3. 1 technical organization measures

3. 1. 1 construction technology of fire retardant coating for steel structure

1) Preparation and adjustment before construction

1. 1) The fire-retardant coating for steel structure is applied by roller coating (roller brush) or spraying (spray gun), and the professional construction team is required to carry out the construction in accordance with relevant regulations.

1.2) Accessories such as steel structure or steel grid frame shall be installed before construction, and construction can only be started after inspection.

1.3) Before construction, the surface of steel structure shall be derusted, and the derusting and rust prevention shall comply with the relevant provisions of the current Code for Construction and Acceptance of Steel Structure Engineering.

1.4) During construction, joints shall be filled before construction.

1.5) During construction, the coating shall prevent dirty liquid pollution and mechanical impact.

1.6) The suitable temperature of the construction environment is 5-35℃ and the relative humidity is below 80%. The temperature of coated steel structure must always be above 3℃, and attention should be paid to the ventilation of the construction site.

1.7) It is recommended to use roller coating (roller brush) or spraying (spray gun).

The fireproof time of the steel mesh is 1.5 hours, and the ultra-thin steel structure fireproof coating is applied with the thickness of 1.44 mm, and the coating thickness is controlled at 0.25-0.4 mm each time, and the interval between times is at least 2 hours until the thickness requirement is met;

The fire-resistant time of steel purlins is 1.0 hour, and the ultra-thin steel structure fire-retardant coating is applied, with the thickness of 0.96mm, and the coating thickness is controlled at 0.25-0.4 mm each time, and the coating is applied for three times until the thickness requirement is met.

1.8) is not suitable for construction in rainy days, foggy days and when the ambient humidity is more than 80%.

1.9) Before construction, it must be fully stirred evenly before use. If the coating is too thick during construction, the consistency can be adjusted by adding a matching diluent with a total amount not exceeding 5%.

2) Quality requirements

2. 1) Fire retardant coatings must have the fire resistance limit test report of the national testing organization.

2.2) When the fire retardant coating for steel structure leaves the factory, the product meets the relevant national standards.

2.3) In the same project, every time 100t steel structure fire retardant coating is used, the bonding strength shall be tested by sampling.

3. 1.2 construction process

1) Construction preparation-acceptance and handover of base surface-cleaning steel mesh-hanging safety mesh-dust removal-roller coating or spraying for the first time-roller coating or spraying for the second time-roller coating or spraying for the third time-roller coating or spraying for the fourth time-cleaning and local treatment.

2) Cleaning steel grid: After the construction conditions are met, the base surface of steel members should be treated to remove dust and oil stains before construction.

3) Coating construction: the thickness of the first construction is 0.05-0. 1mm, the second construction should be carried out more than 2 hours after the surface is dried, and the coating thickness of each subsequent construction should be controlled at about 0.25-0.4mm until the specified thickness is reached.

4) In the process of painting, operators should carry instruments to detect the thickness to meet the requirements of fire prevention.

5) Protect the wet fire retardant coating, and set obstacles and warning signs in the wet transparent layer area to prevent the wet coating from being artificially damaged.

6) Check whether the whole painting system is qualified, remedy the problems found in time, and clean the whole painting area and surrounding environment; Cleaning tools; Clean up the garbage and packaging generated in the construction process and keep the site clean.

3.2 Construction measures for specific construction sites

3.2. 1 stadium

The grid structure mainly adopts bolted ball joints, and some load-bearing joints adopt welded ball joints. The grid structure adopts double-layer quadrangular pyramid grid structure.

The stadium grid structure is a floating strip grid structure. With an area of 16430m2, it is divided into 9 districts: a.b.c.d.e.f.g.h.j * * *. From the top of the roof, the height is 30.200m.. Among them, A, B, C, D, H, and J are grid structures supported by peripheral points, and E, F, and G are large cantilever roof structures, with the maximum cantilever of 25.7m, the grid height of inner ring 1.500mm, outer ring 1.800mm, and the grid structure of column top of 3200 mm.. Some points of the grid structure are supported on the top of reinforced concrete columns. The support points of the grid are all set in the lower chord. The grid structure of the gymnasium is supported on all sides, with a width of 70.5m, a length of 98m and a height of 4m, a grid structure of 4.2m× 4m and a roof area of 69 10 m2. The lower concrete column is supported by peripheral points, and the column spacing is 8.4m. 4- 15-4- 17 shaft roof. The main frame beam span is 16.4m, and the secondary beam span is 8 ~ 10m. This single-story roof steel structure is hinged on the top of the lower concrete column (partially rigid) and rigidly connected with the 4- 15 axis steel reinforced concrete column.

According to the above characteristics, in the construction of grid fire retardant coating, a safety net is laid at the bottom chord of the grid, and the construction personnel use shoulder belts to hang on the grid for roll coating or spraying to ensure the construction safety; When painting the bottom chord, if the height permits, mobile scaffolding should be built for painting, and each place is composed of two groups of mobile scaffolding to form a construction platform.

3.2.2 Precautions for construction personnel:

3.2.2. 1 Strictly observe the discipline of production safety.

Patients with acrophobia and contraindications are strictly prohibited from entering the high-altitude scene in 3.2.2.2. Operators of various special types of work in 3.2.2.3 must hold relevant certificates.

Workers working at height in 3.2.2.4 must wear safety helmet, safety belt, non-slip shoes and labor tools.

In 3.2.2.5, it is forbidden to work under the influence of alcohol and illness.

In 3.2.2.6, it is strictly forbidden to make fun of, make fun of, or affect work attention during work.

Materials and tools used on 3.2.2.7 Viaduct must be placed neatly, stably and firmly to prevent falling.

In 3.2.2.8, protective railings should be set up for the construction of necessary space-time structure. 3.2.2.9 aerial work shall not leave anything behind, in case of injury.

3.2.2. 10 cooperates with the safety inspection, and the safety requirements of the security inspectors must be resolutely obeyed and seriously implemented.

3.2.2. 1 1 Set safety warning signs.

3.2.2. 12, scaffolding conform to the requirements of the regulations, and regular inspection and maintenance, check the stability before operation.

3.2.2. 13 aerial workers should wear light clothes and soft-soled shoes.

3.2.2. 14 People suffering from mental illness, epilepsy, hypertension, heart disease, drunkenness and listlessness are forbidden to work high above the ground.

3.2.2. 15 There must be a safe passage at the aerial work site, and too many objects shall not be piled in the passage, and garbage and waste shall be cleaned up and transported away in time.

3.2.2. 16 When working at height above the ground 1.5m and 1.5m, you must fasten your seat belt and hang it in a solid and reliable place above, with the height not lower than the waist.

3.2.2. 17 Stop aerial work in case of strong wind and bad weather of magnitude 6 or above.

3.2.2. 18 When working on a light or simple roof, wooden boards should be laid to disperse the stress, so as to avoid trampling on the roof.

3.2.2. 19 It is forbidden for people to go up and down with the hoisted object, and climbing is not allowed when the hoisted object is unstable. In 3.2.2.20, it is forbidden to hold objects when walking or climbing at high altitude.

3.2.2.21Clean up the workpieces and scattered articles on scaffolding in time. 3.2.3 Safety measures to prevent falling objects 3.2.3. 1 Cause analysis of falling objects from high altitude

1), mechanical damage, dumping, and hanging pieces falling due to overweight or misoperation of hoisting machinery.

2), all kinds of lifting tools (wire rope, unloading card, etc. ) due to insufficient bearing capacity, it is pulled or broken, resulting in falling objects.

3) The bearing capacity of the platform used for bearing is not enough, which causes the object to fall.

4) In the process of lifting, the scattered objects on the hanging objects fall and are not bound or cleaned.

5) When working high above the ground, pull the power cord or hose, drag sporadic objects or knock them down when walking.

6) Inadvertently dropping objects when walking or passing objects with objects at high altitude.

7) When cutting objects and materials at high places, there is no fall prevention measure.

8), throwing objects down.

3.2.4 Safety measures to prevent falling objects from injuring people.

1), for important and bulky hoisting, detailed hoisting construction technical measures and safety measures must be formulated, which shall be handled by special personnel under unified command and equipped with full-time safety supervisors.

2) When engaged in aerial work, you must wear a tool bag and fasten the safety rope for large tools.

3) Strengthen the cleaning and storage management of aerial work and scaffolding small items, and take measures to prevent objects from falling.

4) When passing objects up and down, use a rope to pass them, and don't throw them up and down. When transferring small workpieces and tools, use tool bags.

5), try to avoid cross operation, demolition or lifting operations, set up a warning zone in the operation area, it is forbidden to irrelevant personnel to enter.

6) When lifting scattered articles, use a special spreader to lift them.

3.3 Quality assurance measures

3.3. 1 Adhere to the whole process quality control.

1) Do a good job of construction training before construction, especially for new technologies, new materials, new processes and new equipment to be applied in construction.

2) Make a construction plan. Each construction team must formulate the construction scheme of key working procedures and report it to the project department for approval.

3) Technical support. The technical service department and the company's technical research and development center provide technical support for the construction scheme and site construction of each construction team. The company's technical representatives are stationed in the construction site for a long time to provide technical support and supervision for the construction quality and provide quality assurance.

4) Reasonable allocation of construction tools, good protection work, to ensure that it is in good working condition.

5) Do a good job in the protection of each working procedure and semi-finished products in the construction process. The operator of the previous procedure must make a disclosure of finished product protection for the operator of the next procedure. The operator of the next working procedure is the protector of the last working procedure, and shall not damage the product of the last working procedure under any excuse.

3.3.2 Quality Technical Disclosure

1) implements a three-level quality inspection system. The construction team records the original construction data, conducts quality self-inspection, and the builder and quality engineer are responsible for inspection and recheck. For the part that belongs to concealed works, the builder and quality controller must follow the classes, handle and solve the problems in time, do a good job in concealed works and intermediate acceptance in time, and strictly guarantee the quality of concealed works.

2) Regular and irregular supervision and inspection.

3) Obey the supervision and inspection of Party A.. All projects shall be supervised and inspected by Party A and the supervisor; If any quality hidden trouble is found in the construction process, corrective measures shall be taken immediately, and rectification shall be made within a time limit.

4) Optimize the construction scheme, reasonably arrange the construction procedures, and conscientiously do a good job in the quality standards and construction technical disclosure of each procedure.

Fourth, the rainy season, winter construction measures

4. 1 Safety construction measures in rainy season

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4. 1.2 For the construction site and component production base, the water in the site should be drained according to the terrain to ensure that there is no water and running water in the site, and to prevent the surface water around the site from flowing into the site.

4. 1.3 Drainage ditches are set on both sides of the main transportation roads in the field to ensure that the vehicles will not get stuck after the rain.

4. 1.4 The brake box of mechanical and electrical equipment should be rain-proof and moisture-proof, mechanical and electrical equipment should have a special canopy, wooden cases should be erected overhead, and grounding safety devices should be installed, so that the leakage protection at the mechanical and electrical brakes can be reliably grounded.

4. 1.5 During construction in rainy season, materials with waterproof and moisture-proof requirements should be piled up in higher places as far as possible, and the surrounding booths and roofs should be well drained.

4. 1.6 When transporting raw materials in rainy days, they should be covered, and anti-skid measures should be taken for slopes and roads.

4. 1.7 No construction is allowed during heavy rain.

4. 1.8 Precautions in rainy season

1) After the rain, carefully check the bottom formwork support and reinforce it.

2) When using electrical equipment in the open air, reliable leak-proof measures should be taken.

3) Do a good job of moistureproof materials.

4) Fire fighting equipment shall be provided with rain and sun protection measures.

5) Flammable materials such as chemicals and paints shall be properly kept by special personnel to prevent them from being affected with damp, deterioration and fire.

6) The storage place of each use bag shall be provided with rain-proof and moisture-proof measures to keep good ventilation.

4.2 Safety construction measures in winter rain (snow) season

4.2. 1 winter construction safety construction measures

When the average outdoor temperature is stable below 5℃ for 5 consecutive days, winter construction will be started.

4.2. 1. 1 When the temperature on the construction site is lower than 5℃, the construction of steel fire retardant coating shall be suspended, and the construction can only be started when the temperature reaches above 5℃. Avoid morning and evening construction, and carry out construction from 9: 00 am to 4:00 pm to meet the construction temperature requirements.

4.2.2 Construction safety measures in rainy (snowy) season

4.2.2. 1 Construction in rainy (snowy) season is mainly based on prevention, and measures are taken to prevent rain (snowy), strengthen drainage means, do a good job in information feedback of construction in rainy (snowy) season, and take preventive measures for problems that are easy to occur.

Method to eliminate, to ensure normal production in the rain (snow) season, not affected by seasonal climate.

Waterproof and moisture-proof measures are taken for the brake box of mechanical and electrical equipment in 4.2.2.2. When workers are working on scaffolding, they should make safety technical disclosure in advance and take anti-skid measures in time.

During the rainy (snowy) period in 4.2.2.3, materials with rainy (snowy) and moisture-proof requirements should be piled up in higher places as far as possible, and rain (snowy) moisture-proof drainage should be done for the surrounding stalls and roofs.

When transporting raw materials in rainy (snowy) days in 4.2.2.4, it should be covered, and anti-skid measures should be taken on slopes and roads.

Matters needing attention in rainy (snowy) period in 4.2.2.5

1) After rain (snow), carefully check the bottom formwork support and reinforce it.

2) When using electrical equipment in the open air, reliable leak-proof measures should be taken. 3) Do a good job of moistureproof materials.

4) Fire fighting equipment shall be provided with rain (snow) and sun protection measures.

5) Flammable materials such as chemicals and oily materials shall be properly kept by special personnel to prevent them from being affected with damp, deterioration and fire.

6) The storage place of each use bag shall be provided with rain (snow) and moisture-proof measures to keep good ventilation.

Verb (abbreviation of verb) safety guarantee measures

5. 1 The construction personnel will be given strict safety education, and they can enter the site only after passing the examination.

5.2 All paint construction personnel shall wear safety helmets and non-slip shoes when entering the site.

5.3 Assign a person with experience in construction site safety management as a full-time security officer to conduct on-site safety supervision.

5.4 Ensure that all construction personnel strictly abide by the rules and regulations formulated by you after entering the construction site, so as to meet your comprehensive requirements for safe production on the construction site.

5.5 The dismantling of scaffolding shall be carried out after the project leader calls relevant personnel to formulate measures. Demolition should be guarded by special personnel, from top to bottom, one step at a time. When transferring scaffolding, the upper and lower personnel should cooperate well to ensure safe removal.

6, civilized and environmental protection construction measures

6. 1 civilized construction management measures

Civilized construction is an orderly, standardized, standard, neat and scientific construction activity in the project implementation stage. It is an effective way to improve people's working conditions, adapt to the new environment, improve construction efficiency, eliminate urban environmental pollution, improve their own civilization quality, and ensure safe production and engineering quality.

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6. 1.2 Implement effective management and supervision measures, so that the civilized construction, safety management and quality management of the project can be combined with each other, with full participation and all-round development.

1) implements the post responsibility system. Implement various management systems and specific management measures and systems;

2) The project manager shall conduct self-inspection and summary once a week around safety management, engineering quality and civilized construction. Project intends to inspect and supervise the construction site, and punish violations.

6.2 civilized construction site management measures

6.2. 1 The construction site must be planned and arranged according to the general plan of the construction organization design, and the materials used in the construction, such as materials and semi-finished components, shall be stacked at the designated location on the site.

6.2.2 Abide by the rules and regulations, operating procedures, post responsibility system and various safety warning signs of the construction site.

6.2.3 Strengthen the safety work on the construction site. Take necessary anti-theft measures, improve the access control management system at the construction site, and the construction personnel shall wear relevant certificates at the construction site. Non-construction personnel are strictly prohibited from entering the construction site without authorization.

6.3 Environmental protection measures

6.3. 1 Without taking effective measures, it is not allowed to melt asphalt or burn linoleum paint and other substances that produce harmful smoke and toxic gases at the construction site.

6.3.2 Domestic sewage under construction shall be discharged into the designated drainage pipeline and shall not be discharged at will.

6.3.3 Keep the traffic passages within the relevant scope of the construction site regularly cleaned and dusted with water to control dust pollution.

6.3.4 Raw materials on the construction site shall not be piled up outside the enclosure, and materials and semi-finished products shall be piled up in strict accordance with the requirements and clearly marked with identification plates.

6.3.5 After the completion of the project, all enclosures, safety protection facilities and other temporary facilities on the construction site shall be dismantled in time as required, and the construction site and surrounding environment shall be cleaned, so that the work is finished, the materials are cleared and the site is clean.

Seven, the main material dosage plan

Meet the requirements of the project schedule.

Eight, the project schedule objectives and plans

Nine, the construction progress guarantee measures

Our company supplies goods in time and quickly. After the paint color is determined, the product can reach the construction site within ten days through the procedures of declaration, production and transportation.

9.2 Organize a highly skilled painting construction team to carry out construction under the leadership of personnel with long-term painting construction management experience.

9.3 The paints of different venues should be cross-constructed.

9.4 Use the scaffolding of the leased building construction unit for paint construction to speed up the project progress.

Ten, time limit for a project guarantee measures

The timely completion of the project is the most basic requirement of the project construction, and the realization of the project duration involves many factors. In the whole construction process, it is the key to the successful completion of the project to pay attention to the factors affecting the construction period and formulate reasonable countermeasures. In order to complete this project within the specified time, our company will take the following measures:

10. 1 Do a good job in construction coordination.

10. 1. 1 Construction coordination is one of the key factors that determine whether the project can be carried out smoothly and ensure the construction period, involving all aspects of work.

10. 1.2 Organize and deploy in a unified way, and do a good job in construction coordination. As the command organization, the Project Management Department, through unified command, careful planning and timely adjustment of the construction plan, made the whole project construction plan and construction focus prominent, the construction was carried out in an orderly manner, the progress was balanced and reasonable, and the overall construction plan was realized.

10. 1.3 In addition to timely handling possible situations in construction according to the requirements of resident engineers and supervisors, we should also actively cooperate with the design department to correct possible design problems.

10.10.4 cooperate with the inspection and guidance of the supervision engineer, implement the inspection procedures, communicate and coordinate with relevant units in time, report the work progress and problems to be solved, and solve various technical and other construction problems in time.

10.2, strengthen the plan management.

Project plan management is the premise of the successful completion of the project, and the following items should be paid attention to in the field construction management:

10.2. 1 According to the progress plan, make weekly and daily construction plans, and scientifically adjust the construction plans in time according to the overall construction plan and the actual situation on site, so as to make the technological process scientific and reasonable and play a guiding role in the on-site construction.

10.2.2 in actual construction, record the actual completion of daily and weekly plans, and compare them with the original schedule, find weak links and contradictions in time, put forward remedial measures, predict the time required for unfinished projects, and put forward specific plans to speed up the progress.

10.2.3 plan coordination meeting will be held regularly every week to study and solve the existing problems according to the site construction and plan implementation this week and issue the construction tasks for next week.

10.2.4 layers to carry out the responsibility for the construction period, establish a reward and punishment system. The project manager department clearly implements the construction period, relevant economic responsibilities and rights and interests to the team, and the team must ensure that the specified tasks are completed according to the operation plan.

10.2.5 Strengthen supervision and inspection, timely adjust the schedule and implement dynamic control and management. Including checking the construction preparation, construction plan and contract implementation, checking and comprehensively balancing the allocation of labor and materials, and checking and adjusting the management at all levels on site.

10.2.6 master the negotiation of construction water, electricity and weather forecast, and actively adjust the planned deviation during construction; Ensure the effectiveness of the construction scheme in actual construction.

Eleven, finished product protection measures plan

The 1 1. 1 No-going sign shall be set on the constructed part.

1 1.2 If it is really necessary to carry out the operation and construction of other projects, it is necessary to avoid hitting or trampling on the completed parts.

1 1.3 Construction personnel should regularly inspect the completed construction site.

1 1.4 If any parts damaged by impact or trampling are found, they should be repaired in time to keep the finished parts intact and achieve good fire prevention effect.

Twelve, project acceptance

12. 1 paint works can not be accepted until they are completely dry. At the time of acceptance, the model and material warranty of the materials used shall be checked. The color shall conform to the design or user's choice, and the color of the same steel grating shall be consistent, and shall not be omitted or defiled.

12.2 There is no obvious seam trace at the painted joint of the same steel grating.

12.3 the painting project of steel grid structure shall meet the specified values of the following indicators (the inspection quantity shall be spot-checked according to the painting area 10%):

12.3. 1 No powder shedding or peeling is allowed. 12.3.2 coating leakage and spots are not allowed. 12.3.3 sagging and pimples are not allowed.

12.3.4 The color is consistent with the brush pattern, and the brush pattern is smooth and uniform.

12.3.5 The burr pattern is uniform in size and distribution without obvious grafting.

12.4 acceptance method

The thickness of fire-retardant coating for steel mesh is 1.44mm, and the thickness of main purlin is 0.96 mm During acceptance, a professional thickness gauge will be used to conduct spot checks on the construction area. The final acceptance standard shall be subject to the fire control acceptance.