What are the winter construction measures?

1. Thermal storage and insulation method, that is, using a covering with thermal insulation effect to keep the temperature of the concrete mannequin and the temperature generated by the cement hydration heat from decreasing or slowly decreasing over a period of time.

2. The construction process when the daily average outdoor temperature is stable below 5°C for 5 consecutive days is called winter construction. The temperature drops in winter, with the temperature in many areas falling below 0°C (i.e. negative temperature). The moisture contained in soil, concrete, mortar, etc. freezes and building materials are easily brittle, causing many difficulties in construction.

3. In areas where the low temperature lasts for a long time, the soil particles are fine, and the water supply is abundant, during the freezing period of the soil, due to the action of film water and capillary water around the soil particles, the water in the soil continuously flows toward the soil. Freeze lines accumulate and form ice layers, which increase in volume so that the gaps between soil particles cannot accommodate them and bulge upward, causing frost heave. The expansion force can be as large as 0.5 to 1.0 MPa.

Winter construction measures, winter construction generally refers to winter construction when the daily average temperature is lower than 5 degrees for five consecutive days; the northern part of Northeast China generally has a winter construction period of five to six months, probably in October Mid to mid April.

According to the meteorological data in the "Building Construction Manual", the winter construction period in Harbin is from 10.18 to 4.14, Mudanjiang is from 10.16 to 4.13, Qiqihar, Jiamusi, etc. are similar to them, but Yichun is longer. ; As for the winter shutdown, it depends on the specific conditions of the project. It usually takes about three months. If it is an indoor project, it will be shorter, one or two months.

Extended information:

Based on the characteristics of winter construction, carefully analyze the types and causes of accidents prone to winter construction in the region, identify and find various major accident hazards and weaknesses in safety production management In this link, we must be truly aware of the sources of major accident hazards in the region and carry out key supervision. Strengthen the hierarchical supervision and work inspection of superiors to subordinates, strengthen the supervision and inspection of the implementation of safety responsibilities, and pay close attention to the implementation and implementation of various measures.

According to climate change, different types of work should be flexibly arranged. When encountering severe weather such as strong wind, rain, snow, etc., outdoor operations should be stopped immediately, water and snow on the construction site should be removed in a timely manner, and effective measures should be taken to Normal construction can be carried out only after taking anti-freeze and anti-slip measures. Supervision units should strictly control and eliminate the hidden dangers of falling accidents from heights.

Baidu Encyclopedia - Winter Construction Measures