Precautions for winter construction

1. Earthworks.

1. Earthworks should not be constructed in winter, if they must be constructed in winter, the construction method should be determined after technical and economic comparison. Before construction, it should be carefully planned and prepared to achieve continuous construction. 2. When the earthwork is excavated by the anti-freezing method, it can be covered with insulation materials or the topsoil can be ploughed and raked loosely before freezing, and the ploughing depth should be determined according to the local climatic conditions, generally not less than 30 cm.

3. The thickness of each layer of soil filling in winter should be reduced by 20%-25% compared with the normal temperature construction, and the reserved settlement should be appropriately increased compared with the normal temperature construction. 4. The winter fill shall meet the following requirements:

Before filling, the ice, snow and insulation materials on the substrate should be removed; Within 1m of the surface layer of the fill slope, it shall not be filled with frozen soil;

The frozen soil blocks in the filler should be evenly distributed.

Compacted layer by layer, its content should meet the design requirements. 5. The filler under the ground surface layer shall not contain frozen soil blocks. After the completion of the filling and before the ground construction, anti-freezing measures should be taken. 2. Concrete structure engineering.

1. If the outdoor daily average temperature is stable and lower for 5 consecutive days, winter construction measures should be taken for concrete structure engineering.

And anti-freezing measures should be taken in time for a sudden drop in temperature. 2. The compressive strength of concrete poured in winter before freezing.

Not less than the following:

Portland cement or ordinary Portland cement.

Formulated concrete, the concrete strength standard for the design.

30% of the value;

The concrete prepared by slag Portland cement shall be 40% of the standard value of the designed concrete strength, but not greater than C10 concrete, which shall not be less than.

Winter is the peak period of construction operations, due to the cold and dry climate and the construction units are eager to rush to complete the tasks of the year, it is very easy to cause fire, collapse and fall from height, gas poisoning and other accidents. In winter, the key points of construction should be five preventions: anti-skid, fire prevention, explosion-proof, anti-electric shock, and anti-poisoning.

Entering the winter construction, some measures should be formulated for the safety of the construction.

1. Anti-slip. Water, frost and snow on the on-site roads, scaffolding, gangplanks and walkways should be removed in time and anti-skid measures should be taken.

2. Windproof. 1. The asset department, mechanization and relevant units should formulate effective anti-tipping and anti-collision measures for problems such as strong winds or sudden power outages.

2. Strictly implement the "ten do not hang", and shall not carry out lifting operations in case of severe weather such as strong winds and heavy snow.

3. Anti-freezing. 1. According to the characteristics of the winter use of machinery and equipment, do a good job in the "seasonal maintenance" of machinery and equipment.

2. The asset department and mechanization should carefully inspect the foundation, backing plate and track of large machinery, and carefully inspect the safety protection devices of machinery.

Fourth, fire prevention. 1. Strictly implement the hot work ticket system, strengthen the supervision and inspection of key fire prevention parts, especially flammable materials such as quilts for building construction insulation and valuable equipment such as transformers.

2. Strengthen the management of construction electricity, standardize wiring, strictly prohibit indiscriminate pulling of power cords, and all units should inspect the damage to electric tools, various power cords and welding wires to prevent electric shock and fire accidents.

The precautions for winter construction are mainly as follows:

1.Material protection, because it is relatively cold in winter, the moisture content in the air is also insufficient, and it is necessary to pay attention to handling with care during the transportation and handling of materials, otherwise it is easy to cause damage to the materials.

2, construction waiting, the winter weather is relatively cold, after the construction of the wall and ground is not easy to dry, many times after a process is done, it takes a longer time to be able to continue the next process, must not be the previous process is not completely dry, start the next process.

3. Rainwater erosion, the rainwater in winter must be paid attention to, and the rain cannot be allowed to erode the construction materials and ground, otherwise the previous work will be done in vain.

If you are angry, because sometimes it is because a lot of things are easy to be used, so a lot of them need some. Uh, the warm phase, the electric cooker all need some smoke. Warm facilities.