I. Basis for compilation

1, xx school teaching building engineering construction drawings

2, the concrete structure engineering construction quality acceptance specification "

3, the school teaching building project construction organization design

Second, the project overview

This project is the teaching building of xx school. The main building is 6 stories high and adopts cast-in-place reinforced concrete frame structure. 0.000 is equivalent to the elevation of 98.6 meters in the Yellow Sea.

Third, the construction preparation

1, technical preparation

1) According to the site conditions, self-mixed concrete or precast concrete shall be adopted. When using self-mixed concrete, the mix proportion of on-site construction should be adjusted according to the design requirements.

2) Conduct template acceptance after meeting the requirements, and control the elevation and axis. Cement warehousing and entry are piled up in the same batch number, and sand and gravel are piled up in different warehouses.

3) Take construction technical measures according to the season.

2, material preparation

Fully prepare cement, sand, stones, additives, etc. Concrete that meets the specification requirements.

3, mechanical preparation

The main machines are concrete pump trucks, concrete transport vehicles, excavators, plug-in vibrators, flat vibrators, water pumps and so on. The main machines are trolleys, tandem drums, large and small flat shovels, iron plates, irons and trowels.

4. Construction conditions

1) Clean up the dirt, garbage, sawdust, water and oil stains on the cushion layer and the steel bars in the formwork, repair the cracks in the embedded formwork, strengthen the formwork support and prevent slurry leakage.

2) Conduct a comprehensive inspection of steel bars and templates, conduct concealed inspection and preview in the class, and play the concrete pouring elevation line on the template.

3) All kinds of machinery are in good condition, and electricity, water and roads for construction meet the requirements.

4) Scaffolds and walkways for concrete pouring have been erected, and they meet the construction and safety requirements after inspection.

5) Technical disclosure of quality and safety for operators.

Fourth, the operation process

process flow

Operation preparation → commercial concrete is transported to the site → construction joint grouting → concrete is transported to the pouring site → concrete pouring and vibrating of floors, columns, shear walls, beams, plates and stairs → maintenance.

1, concrete pumping

1). Before pumping concrete, pump a proper amount of water, and then pump 1: 2 mortar to make the pipeline wet. Pipe wetting mortar is prepared by the site. After being pumped to the pouring point, the mortar wetting the pipeline should be dispersed in the operation surface and not allowed to enter the beams and columns.

2) Concrete pumping shall be carried out continuously. If it is necessary to interrupt, the interruption time shall not exceed the allowable duration from concrete mixing to pouring, otherwise it will be difficult to ensure the quality of concrete. That is, when the temperature is greater than 300C, the time for transporting concrete to the site shall not exceed 65438 0.0 hours; The temperature is 25-300C, and shall not exceed 65438 0.5 hours; The temperature is 20-250℃ and shall not exceed 2.0 hours; When the temperature drops below 200℃, it shall not exceed 3.0 hours.

3) In case of pipe blockage during concrete pumping, the supplier and site construction personnel shall immediately and effectively clean up the pipe blockage to ensure the continuity of construction.

4) When pumping or re-pumping, removing the blockage and cleaning the concrete pump, the outlet of the concrete delivery pipe should be in a safe direction to prevent the blockage or mud from flying out at high speed and hurting people.

5) Before the end of concrete pumping, the concrete supplier shall work with relevant personnel on the construction site to calculate the required concrete quantity to prevent waste and notify the supplier immediately.

6) After pumping, the operators on the construction site shall, under the guidance of the supplier, clean the concrete pump, conveying pipe and its accessories in time and keep them properly.

2. Concrete pouring.

3. Maintenance of concrete.

Five, concrete quality control and quality standards

Six, the construction matters needing attention

1, strictly check whether the cement, aggregate, water and admixture used in concrete meet the specification requirements.

2. Strictly control the mixture ratio of concrete.

3. Pay attention to the mixing method and time.

4. Correct maintenance.

5. Pay attention to the construction measures in summer and winter.

6. Safe construction.

Special Construction Scheme for Concrete (II)

(a), the project introduction

This project covers an area of 4165438+5000m2 from Di Hong Village to mei kou xiang Town Head.

(2) Number of major projects

1, 15cm interstitial macadam subbase:

2, 15cm 5% cement stabilized macadam base:

4, 22cm cement concrete surface:

Planned commencement time: 2065438+August10,03, handover time: 2065438+February 20, 2003.

Start construction on schedule, reasonably arrange the construction period of each sub-project of this project, optimize the operation scheme of each process, ensure the project is completed as planned, and strive to complete the task ahead of schedule.

Second, the cement concrete pavement construction safety technology

(a), construction preparation

(1) Before the pavement starts, on the basis of being fully familiar with the design documents and technical disclosure, conduct on-site inspection and construction investigation.

(2) According to the requirements of the total construction period, the construction difficulty and the preparation of personnel, equipment and materials, determine the construction technology and scheme of concrete pavement, prepare the implementation construction organization design, report it to the site supervision engineer and the owner for approval, and submit the commencement report in time.

(3) The concrete mixing station should be located at one side of the paving section, and the internal layout should meet the requirements of raw material storage and transportation, concrete transportation, water supply, power supply, steel bar processing, etc. And as compact as possible to reduce the occupied area.

(2), concrete mixing and transportation

1, cement concrete mixing, should be carried out in accordance with the provisions of the concrete mixing station. The feeding sequence is gravel, cement and sand. Concrete mixing time should be determined by trial mixing according to the requirements of mixture ratio.

2, dump truck transporting concrete mixture, shall not be overloaded and overspeed, should keep a safe distance between vehicles. When the car stops, it must be lifted and unloaded. When the carriage is not put down, the operator shall not get on the train to remove residual materials.

(3), concrete paving

1, cement concrete is paved manually.

2. When the three-roller grader is leveled, it is forbidden for the driver to leave the cab without authorization. Irrelevant personnel are not allowed to stay on the bridge or go up and down the leveler. The cable should be kept by a special person to ensure that it is not knotted or crushed. If abnormal phenomena are found, stop the vehicle immediately for inspection.

3. When the grader is parked on an open road, obvious safety signs must be set around it. Warning with red light at night, its visibility is not less than150m.

(4), slit, health care

Concrete construction should try to avoid rainy days. In the case of rain, the paved concrete should be protected by canopy to complete the subsequent process and ensure that the newly poured concrete is not leached by rain. It is forbidden to continue to use the concrete mixture that has exceeded the initial setting time, and it is forbidden to spread it at the bottom of the concrete for disposal. Every 100m3 concrete, make a set of test blocks, with 6 blocks in each group, as the basis of 28d strength of concrete.

After the completion of vibrating, the excessive mortar on the concrete surface must be scraped off, and the original pulp should be plastered. Concave-convex degree shall not exceed 5mm, and rework shall be done immediately if it is unqualified. Use a long-handled wooden plaster with a length of 45cm, a width of 20cm and a thickness of 2.5cm, put a bamboo pole with a length of 3.5m on it, and the height of the other end from the ground is1m. When using it, wipe the big wood on the concrete surface and smooth it back and forth. The operator stands on the side of the cement board and drags it along the cross slope direction, overlapping the plastering back and forth12. Finally, When making noodles, it is forbidden to sprinkle water and cement powder on the concrete panel. After plastering, rub it flat with a wooden trowel, and use brawool to absorb the surface bleeding. After the final setting of concrete for 3 hours, the surface has a considerable hardness, and when there is no trace with fingers, the curing can be started. Because there is much rain and high air humidity in spring, it is maintained with wet water. After the board surface is dry and white, it shall be wetted with water and maintained for not less than 7 days. The joint cutting work shall be carried out in time after the final setting of concrete 12 hours.

When the seam cutter saws seams, the nut of the blade splint should be tightened, and the connector and safety shield should be intact. Open the cooling water before slotting, and stop slotting when the cooling water is interrupted. When cutting seams, the blade should cut slowly and pay attention to the cutting depth indicator. When the cutting resistance is great, the blade should be lifted immediately for inspection. When the slitting stops, the blade should be lifted off the cardboard before it can stop running. The cutting depth is not less than 5cm. Joints should be aligned with the original board. Before caulking, remove the silt and sundries in the cracks, and then pour asphalt mastic.

Third, the construction site traffic organization and management system

1, the traffic organization and safety management of the construction site must abide by the Road Traffic Safety Law, the Highway Law and other laws and regulations, and conscientiously implement the provisions of the Technical Specification for Highway Engineering Construction Safety (JTJXX 6-95).

2. During the construction, the roads must be unblocked. If traffic is closed, it must be approved by the people's government at or above the county level.

3, occupy half of the road construction, need to alternate traffic, the construction unit should designate a person to be responsible for guiding traffic around the clock, or set up mobile traffic lights to alternately direct traffic.

4, occupy half of the road construction, need to bypass traffic, should be set up in advance in the detour signs, guide card and bypass road map.

5. Normal maintenance work must be carried out on the construction section, and pits, soft bullets and tripping sections should be handled in time.

6. Both ends of the construction section must be provided with obvious signs of construction, warning and speed limit; In addition to obvious signs of construction, warning and speed limit, protective facilities should be set at both ends of foundation pit and excavation and fill sections. Where there are conditions, night lighting facilities should be set up. If there are no night lighting conditions, reflective signs that meet safety standards must be set up.

7. The construction access road must meet the basic vehicle traffic requirements, and obvious warning, speed limit and load limit signs shall be set at both ends.

8, the construction personnel should wear uniform safety sign clothing; Vehicles and machinery should be clearly marked, and yellow warning lights should be turned on when driving and working.

9. The project manager is the first person responsible for handling road traffic jams in this area. In case of traffic jam, the person in charge of the management department should rush to the scene immediately.

Four, the construction site safety management regulations

1, each construction site must be carried out in strict accordance with the Technical Specification for Safety in Highway Engineering Construction (JTJXX 6-95) and other relevant national and industrial regulations and standards.

2. Anyone who enters the construction site must wear labor protection articles in accordance with the regulations, and the wearer is not allowed to enter the construction site in accordance with the regulations.

3, to participate in the construction of homework personnel, to be familiar with this type of work safety technology operating rules, should stick to their posts in the operation, obey the command.

4, special operations personnel must go through special training, show certificates, to operate independently.

5, according to the provisions, the correct use of protective equipment, protective equipment and safety protection facilities to check regularly, do not meet the safety requirements is strictly prohibited.

6, the construction site of the hole, pit, import and export, lifting, filling and excavation junction, high slope and other dangerous places should have protective facilities and obvious safety signs; Materials and mechanical equipment shall not be placed on the edge of pits, holes and slopes.

7, foundation pit, slope construction should always check the side wall soil stability, found abnormal, personnel to evacuate quickly, and report to the competent leadership, take measures to properly handle.

8, adjust the mechanical and electrical, the operator should strictly abide by the operating rules, non-professionals shall not operate.

9, engaged in high altitude and special operations personnel, to carry out physical examination, who is not suitable for this job, shall not be engaged in this work. Child labor and old, weak, sick and disabled laborers shall not be used in the construction site.

10, all materials for aerial work should be piled up smoothly, and tools should be put into the tool bag conveniently.

1 1. It is safe to enter the construction site, and it is forbidden to stand or pass in dangerous areas.

12, in case of bad weather (such as gale, rainstorm, fog above level 6, etc.). ) affect the construction safety, and it is forbidden to carry out open-air high-altitude and hoisting operations; Underwater operations and slope operations are prohibited in floods or mountain torrents.

13, fire control on the construction site and compound must meet the fire safety requirements; The use of explosives must meet the management requirements of the public security supervision department.

14, when there is a house in the subgrade excavation and rolling operation area, the protection work should be done in advance; Do a good job of subgrade drainage and dust suppression, and achieve civilized construction.

15, the construction personnel have the right to refuse the illegal command of the superior and the production instruction that fails to explain the safety technical measures.

16. People suffering from heart disease, hypertension, epilepsy and the latter are not allowed to work at heights.

17, all full-time and part-time security officers should adhere to the daily inspection system, correct violations in time, and ensure the smooth progress of safety production.

Five, the construction traffic safety management regulations

1. In the reconstruction project, if it is necessary to excavate the subgrade and pavement of the old road for reconstruction, warning signs showing the construction shall be erected at both ends of the construction road, which shall be eye-catching. And leave the road width to ensure the safe driving of motor vehicles.

2. On the original road section, for the slope reduction and reconstruction project, temporary access roads can be built to maintain traffic if conditions permit, half of which will be built on the slope reduction section and the other half will be used for traffic.

3. In the semi-open road section, signs indicating the driving direction and deceleration should be set before the vehicle leaves (enters). At the same time, at both ends of the construction work area, obvious road fences and no-go signs are set up.

4. During construction at night, construction warning lights should be set 30-50 meters before and after the construction section. If there is no lighting condition at night, reflective signs that meet the safety specifications must be set. Red and white guardrails are set between half of the construction area and the roadway, and eye-catching construction warning ropes are connected to the guardrails.

5, half of the construction period should not be too long, generally not more than 300-500 meters. On the single-vehicle road section, when the road section is not long and the traffic volume is not large, the intersection lane can be set on the road section; When the construction section is long and the traffic volume is large, traffic control should be implemented. Each shift is equipped with full-time personnel and communication equipment to direct traffic and divert vehicles. If there is serious traffic jam, contact the traffic police in time.

6. When digging ditches near residential areas or public places, guardrails and springboard should be set for pedestrians to pass. Lighting and red light should be set at night.

7. The road surface of the construction section of this project should be cleaned frequently, so as to prevent traffic safety from being affected by vehicles rolling earth and stone and wet mud roads in rainy days.

8. Traffic safety warning signs should be set 30-50 meters in front of the culvert constructed by precast pipe culvert or precast slab culvert; Half a piece of construction is completed and maintained for 7 days, and it should be backfilled in time to open the traffic.

9. In the reconstruction project, in addition to observing the provisions of Article 2, the safety management of passing vehicles should be strengthened to ensure construction and traffic safety.

Six, on-site safety regulations

1, complete the technical disclosure of full-time electricians.

2. The transformer installed on site must meet the requirements of the power sector and be managed by designated personnel. Try to keep three-phase balance in construction electricity consumption.

3. The wires erected on site should be well insulated, and the hanging height and line spacing must comply with the safety regulations of the electric power sector. It is not allowed to pull wires on the ground.

4. Temporary lines erected on site must have insulation support, and wires shall not be wound on steel bars, trees or scaffolding.

5. When the electrician is close to the high-voltage line, he must operate within the prescribed safe distance, otherwise he must cut off the power before operating.

6, all kinds of electrical equipment should be equipped with special switches, outdoor switches and sockets should be equipped with waterproof boxes and locked, and have regular maintenance records, the name and contact number of the responsible person. Add an insulating pad at the operation place.

7, all kinds of electrical equipment inspection and maintenance, generally should be a power outage; If live working is needed, reliable safety measures should be taken and special personnel should be assigned for monitoring. And must be carried out by an electrician, other personnel shall not operate at will.

8, mobile electrical equipment application of rubber cable power supply, and often pay attention to straighten out; When crossing the road, it should be buried underground or protected by wearing pipes. The wire connector shall be firm and wrapped with insulating tape.

9, mechanical equipment must be fully inspected by full-time personnel before use, in the process of use failure must first cut off the power supply, and then check. Protective covers must be installed on exposed parts such as transmission belt, runner and flywheel of electrical equipment.

10, in case of power failure during work, pull down the switch and cut off the power supply; After maintenance, the equipment must be carefully checked, and it can be closed only if there is no abnormality.

1 1, using high-temperature lamps, in order to prevent fire, the distance between them and flammable items shall not be less than 1 m, and the distance between light bulbs and flammable items shall not be less than 0.5m..

Seven, construction machinery safety management regulations

1, operators shall not leave their jobs without permission, operate machinery that does not conform to the operation certificate, and shall not hand over mechanical equipment to personnel who do not have this type of work.

2, the operator must be in accordance with the provisions of the machine manual, strictly implement the inspection system before work and pay attention to the observation at work and inspection system after work.

3. The cab or operation room should be kept clean and tidy. It is forbidden to store inflammable and explosive articles. It is forbidden to operate machinery after drinking. It is forbidden to run machinery with fault or overload.

4. When mechanical equipment is parked at the site during construction, a safe parking place should be selected, the cab (operation room) should be closed, and the vehicle brake valve should be pulled. When parking on a ramp, hold the wheels with triangular wood or stones. Someone should watch at night.