Construction project management system: seasonal construction measures?

Construction project management system: seasonal construction measures

In order to ensure the engineering quality and the quality control of the whole construction process, the following seasonal construction measures are formulated according to the engineering quality management work of the subordinate departments of our company and the actual situation of this project:

A, winter construction measures

1. 1 When the outdoor average temperature is lower than +5℃ and the lowest temperature is lower than -3℃, all subdivisional works shall be constructed according to the requirements of winter construction to ensure that the strength of concrete before freezing is not lower than 30% of the standard value of design strength.

1.2 adding early strength agent to concrete can improve the early strength of concrete and enhance the frost resistance of concrete.

1.3 Provide a certain amount of plastic film, asbestos quilt and other coverings to cover the fresh concrete.

1.4 extend the time of formwork removal for concrete members, and use formwork for heat storage and insulation.

1.5 materials used in winter construction should be prepared in advance and properly kept; The sand and gravel used shall not contain ice, snow and other lumps; When mixing concrete with hot water, the temperature of hot water shall not be greater than 80%.

When welding 1.6 steel bar, low temperature weather should be avoided as far as possible to prevent the joint from cooling too fast and producing liquid break. Flash butt welding is covered with glass wool for about 3 ~ 5 minutes, and electroslag pressure welding is carried out by extending the time to dismantle the welding box.

1.7 During the winter construction, pay attention to the weather forecast, and arrange the low opening operation when the weather is relatively warm.

1.8 The poured concrete shall designate a special person to be responsible for the on-site temperature measurement, and record the temperature measurement. The temperature measuring time is 6 hours, 12 hours, 18 hours and 24 hours after pouring, and the temperature change should be closely monitored so as to take timely measures to prevent concrete from freezing.

Winter construction preparation

1. Define the winter construction project and prepare the schedule.

Because of the low temperature in winter, poor construction conditions and high technical requirements, the cost will increase. Therefore, it is convenient to ensure the construction quality, and the projects with less cost increase are arranged for construction in winter. For example, installation, piling, indoor painting, decoration, indoor pipeline and wire laying, masonry, concrete engineering and other projects that can be maintained by heat storage method (accelerator can be added); Earthwork foundation projects that greatly increase the cost and cannot guarantee the construction quality; Exterior wall painting, roof waterproofing and roads shall not be arranged for construction in winter.

2. Organize the temperature measurement in winter, and implement the supply channels of various heat sources to ensure the smooth progress of winter construction. The temperature difference between day and night is large in winter. In order to ensure the quality of engineering construction, we should do a good job of organizing temperature measurement to prevent mortar and concrete from being damaged by freezing before setting and hardening. Before the arrival of winter, make arrangements for indoor thermal insulation construction projects, and reserve and supply all kinds of thermal insulation materials and heat source equipment used in winter construction, such as completing the heating system first and installing windows and doors. , to ensure the smooth construction of other indoor engineering.

3, do a good job of outdoor temporary facilities insulation, antifreeze. For example, do a good job in heat preservation of water supply and drainage pipelines to prevent them from freezing and cracking. To prevent the road from freezing, clear the snow on the road in time to ensure smooth transportation.

4, before the arrival of winter, reserve enough materials, components, supplies and so on. , in order to save freight.

5, do a good job in the construction site sorting and inspection, for example, after the completion of the foundation, timely backfill soil to the same height as the foundation; Trench pipe to cover plate; After paving a layer of bricks, install the floor in time; Interior decoration plastering should be done layer by layer to avoid blocking and leaving tail, and interior decoration should be done at one time. If you need to stop working, you should stop at the neat part of the layered frame; The ground of the building should be well protected against freezing and heat preservation.

6. Strengthen safety education, prevent fire, implement fire safety technical measures, regularly check the implementation, ensure the sound use of heat source equipment, do a good job in staff training and technical operation and safety construction education in winter construction, ensure construction quality and avoid safety accidents.

Second, the rainy season work measures

2. 1 Masonry engineering: bricks must be piled up in a centralized way during the rain period, and the dry and wet conditions are not suitable for wall pouring. For example, when the heavy rain stops, a layer of flat brick should be covered on the top brick after bricklaying to avoid mortar being washed away by heavy rain. When laying after the rain, check the verticality and elevation of the completed masonry.

2.2 Concrete engineering: The weather forecast should be grasped in time before the formwork isolation layer is painted to prevent the isolation layer from being washed away by rain. In case of heavy rain, concrete pouring should be stopped and the poured part should be covered.

2.3 Plastering project

Outdoor plastering is not allowed in rainy days (1), and the weather change in 1-2 days can be predicted at least. Attention should be paid to prevent rainwater from polluting the built walls.

(2) Indoor plastering should be carried out as far as possible after the completion of the roof.

(3) It is not advisable to brush the top coat in rainy days.

2.4 All mechanical sheds shall be installed firmly to prevent collapse and leakage. Mechanical and electrical equipment, take rain and flood control measures and install grounding safety devices.

2.5 The material warehouse shall be reinforced to ensure no rain or water leakage.

2.6 according to the situation of the construction site, do a good job in the drainage ditch around the building and excavate the sedimentation tank.

Drained into the main sewer through the water pump.

2.7 In case of heavy rain and thunderstorm, the construction shall be suspended, especially when the tower crane encounters gale or thunderstorm with magnitude 6 or above.

Third, the summer construction measures

1, the brick should be fully wet, and the length of plastering should be reduced accordingly.

2, roofing construction should be arranged after 3 pm, to avoid high temperature time.

3. Cover the poured concrete with straw bags in time, and water it by designated personnel.

4, high temperature season to do a good job of heatstroke prevention and cooling, properly adjust the rest time, to avoid high temperature construction.

5. Do a good job in typhoon prevention and flood control. In case of typhoon of magnitude 6 or above, aerial work is prohibited.

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