What are the five precautions for industrial winter?

Five precautions in winter mainly refer to: anti-freezing, fire prevention, gas poisoning prevention, collapse prevention and disease prevention.

This is what we should pay most attention to in winter:

1. The temperature in winter is relatively low, so it is very important to pay attention to antifreeze;

2. The weather is dry in winter, so be careful about fire prevention and always pay attention;

3. The weather is cold, and most heating facilities have hidden dangers of gas poisoning. In winter, the phenomenon of gas poisoning is obviously increased compared with other seasons, so more attention should be paid.

before construction, according to the requirements in the construction plan, all construction personnel shall be given safety education and training in winter and safety technical measures shall be disclosed. The requirements are to grasp the main points and clarify the responsibilities.

during construction, the construction site shall be inspected according to the requirements in the construction plan. Implement the requirements specified in the construction plan and the formulation of safety technical measures, and confirm the implementation. For those that have not been put in place in the inspection, formulate rectification measures and plans to meet the needs of construction.

in winter construction, we should keep close contact with meteorological and hydrological departments, keep abreast of weather changes, and take corresponding preventive measures in time to ensure construction safety and smooth implementation of construction operations.

Extended information:

In areas with long low temperature, fine soil particles and abundant recharge water, during the freezing period, due to the action of film water around soil particles and capillary water, the water in the soil continuously accumulates to the freezing line, forming an ice layer, and the volume increases, so that the gaps between soil particles can not be accommodated and uplift upwards.

if it is not properly handled, the foundation will be lifted, causing the building to crack, tilt, lift and even collapse. Therefore, when building a building on frost heave soil, we should consider the foundation form, minimize the area of the bottom surface and side surface, reasonably determine its burial depth, strengthen soil insulation and do a good job in surface drainage. In addition, laying sand cushion can cut off the capillary water effect of soil, and backfilling porous materials can also prevent frost heaving.

in order to prevent early freezing injury, it is usually required that the temperature of concrete at the beginning of curing should not be lower than 5 C .. Because the heat storage method relies on the hydration heat of cement and the heat of concrete mixture itself to reach the predetermined temperature under the condition of heat preservation, its curing temperature needs to be raised to above 1 C. Therefore, in the process of mixing, transporting, pouring and tamping concrete, measures must be taken to prevent the heat from emitting too quickly.

when preparing concrete at negative temperature, water and sand can be properly heated, but the temperature of the mixture of water and sand should not exceed 4 C. Otherwise, false setting will easily occur when cement is put into use. In addition to heating curing, concrete can also be mixed with early strength agent and antifreeze in winter to reduce its freezing point and harden concrete at negative temperature.

when chlorine salt is mixed in concrete, its mixing amount should be strictly controlled. Chlorine salt can corrode steel bars and increase the conductivity of concrete, so it can only be used for unreinforced concrete. For prestressed concrete structures, or buildings that are often wet or close to high-voltage power supply, chlorine salt cannot be mixed.

Baidu encyclopedia-winter construction