What is Winter Construction? What are the defining principles of winter construction?

Hello! It's a break from work for a while.

In addition to the reason why the temperature is low and inconvenient for workers to construct, it is also to ensure the quality of the house. Coordinates Northeast cities, generally speaking, the winter break period is mostly from November to March of the following year, of course, it also depends on the specific situation of different construction units and different construction projects.

According to the provisions of the "Winter Construction Regulations for Construction Projects (JGJ 104-1997)", the outdoor average daily temperature is stable below 5 for 5 consecutive days, that is, the winter construction begins; When the average outdoor daily temperature is stable and higher than 5 for 5 consecutive days, the winter construction will be lifted. The start and end dates can be determined by actual measurement, or they can be uniformly demarcated by the negotiation between Party A and Party B.

If construction must be carried out in winter, the following principles must also be ensured:

1) Ensure the quality of the project.

2) During the winter construction process, achieve safe production; The construction of the project should be carried out continuously.

3) Formulate a winter construction plan.

Measures) should be adapted to the conditions of the project at the right time and place, requiring both technical reliability and economic rationality.

4) Consider the heat source and materials required to have a reliable ** to reduce energy consumption.

5) Strive to have fewer construction points, fast construction speed, and shorten the period of the hosiery group.

6) Any project that does not have a winter construction plan (measures) or has not done a good job in winter construction preparations shall not be forcibly carried out for winter construction.

7) Effective winter construction management measures must be developed.

Of course, according to the local climatic conditions, the shutdown period in each region is different, such as the northeast, northwest and other extremely cold climate areas of China, the "hibernation period" of the construction site will be relatively long for several months, but in the middle and lower reaches of the Yangtze River in China.

Including the southern region.

Since the temperature is basically above 0 degrees Celsius, there may not be a "hibernation period" or the "hibernation period" is relatively short.

When the average outdoor daily temperature is stable below 5°C or below 0°C for 5 consecutive days, the construction process is called winter construction.

According to the "Code for Construction of Construction Projects in Winter" JGJ104-97, it is stipulated that when the outdoor average daily temperature is stable below 5 °C for 5 consecutive days, it will enter the winter construction, and when the outdoor daily average temperature is stable and higher than 5 °C for 5 consecutive days, the winter construction will be lifted.

But there are also differences in different industries. For example, the construction specification of reinforced concrete for hydropower stations: when the average daily temperature in cold areas is stable below 5 °C or the minimum daily temperature is stable below -3 °C, the construction should be carried out according to the winter construction method.

Winter Rainy Season Construction Safety Preparation:

When the temperature is lower than 0 or the average temperature for 5 consecutive days is lower than 5, it will enter the winter construction, and the relevant machinery, admixtures and insulation materials should be organized in advance according to the amount of physical engineering in the winter construction.

The on-site power switch, control box and other facilities should be locked, and a special person should be responsible for management, and when entering the winter construction, the construction site should take anti-skid measures. The temporary water supply pipeline and other materials at the construction site should be insulated and anti-freeze. Do a good job in the trial test of concrete, mortar and admixtures in winter construction, and put forward the construction mix ratio.

The defining principle of winter construction is: the outdoor average daily temperature is stable below 5 for 5 consecutive days, that is, the winter construction is entered; When the average outdoor daily temperature is stable and higher than 5 for 5 consecutive days, the winter construction will be lifted.

During winter construction, because the temperature drops and some work cannot be carried out in the construction of the project, measures need to be taken for the construction, so the state has issued the "Winter Construction Regulations for Construction Projects" JGJ104-2011.

Before the project is about to enter the winter construction, it is necessary to prepare and prevent in advance, eliminate unfavorable factors in the bud, collect local winter meteorological data in advance, understand the local temperature changes, duration, minimum temperature and maximum wind, snow and other information, and also understand the weather changes in the coming week during the construction process, only in this way can we prevent problems before they occur.