What are the winter construction measures?

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

2. When the outdoor daily average temperature is stable below 5℃ for five consecutive days, the construction process is called winter construction. In winter, the temperature drops. In many areas, the temperature is below 0℃ (negative temperature), and the moisture contained in soil, concrete, mortar, etc. Building materials are brittle due to freezing, which brings many difficulties to building construction.

3. In areas with long low temperature, fine soil particles and abundant water supply, during the freezing period, due to the action of film water and capillary water around the soil particles, water in the soil continuously accumulates to the freezing line, forming an ice layer, and the volume increases, so that the gaps between the soil particles can not be accommodated and swell upward, resulting in frost heaving, and its expansion force can reach 0.5 ~ 1.0 MPa.

Winter construction measures, winter construction generally refers to the winter construction when the average daily temperature is lower than five degrees for five consecutive days; There is usually a winter construction period of five to six months in the northeast, which is about1from mid-October to mid-April.

According to the meteorological data in the building construction manual, the winter construction period in Harbin is10.18-4.14, Mudanjiang is10.16-4.13, and Qiqihar and Jiamusi are similar. As for the winter shutdown, it depends on the specific situation of the project. It usually takes about three months. If it is indoors, it will be shorter, a month or two.

Extended data:

Combined with the characteristics of winter construction, carefully analyze the types and causes of accidents in winter construction in this area, identify and find all kinds of hidden dangers of major accidents and weak links in safety production management, truly understand the hazards of major accidents in this area, 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, flexible arrangements for different types of work. In case of severe weather such as strong wind, rain and snow, outdoor operation should be stopped immediately, and the accumulated water and snow on the construction site should be removed in time. Normal construction can only be carried out after effective anti-freezing and anti-skid measures are taken. The supervision unit should strictly control the project and eliminate the hidden danger of falling from a height.

Baidu Encyclopedia-Winter Construction Measures