When will the winter construction in Yinchuan stop?

1.In 2006, I participated in the construction supervision of Taiyuan-Yin Zhong railway.

2. At that time, the shutdown date of bored piles was around 65438+February, so it was enough to ensure that the concrete pouring temperature of bored piles was higher than 5 degrees above zero. However, after 65438+2 months, the slurry circulation could not be guaranteed and it was forced to stop working. Bored pile belongs to underground structure, so as long as the mud can ensure circulation and concrete can be mixed and transported in winter, it can be constructed.

3. Bored piles refer to bridge bored piles, and the railway headquarters, that is, the red-headed document of Party A, suggested that the minimum temperature should be below minus 5 degrees. In fact, the mud can only circulate normally when it circulates to minus 15 degrees (the mud on the surface freezes during circulation). So we didn't stop drilling piles until the lowest temperature at night was-15 degrees, and we didn't fully implement Party A's red-headed documents.

4. For the caps and piers, we not only take measures of heating and mixing concrete, but also take measures of filling quilts in the tank car. After pouring, we also take the measures of setting up a frame tarpaulin and then heating it with a coal stove. Therefore, the pile caps and pier shafts have not been greatly affected. Generally speaking, the construction of pile caps and piers stopped after the lowest temperature in Yinchuan reached MINUS 15 degrees at night.

Admittedly, because it coincided with the great development of national railway and high-speed rail construction in 2006, it was built without hesitation. In fact, a series of measures for winter construction are neither economical nor fully guarantee the quality. Therefore, after the 20 1 1 railway and high-speed rail construction slowed down, Party A and the national high-level officials have not encouraged the rush to work in winter. Now according to my guess, the general project 12 will have a holiday in Yinchuan. In 2006, our holiday was in the twelfth lunar month.

6. Conclusion: If my guess is correct, the shutdown of Yinchuan construction site should be around Christmas, that is, around1February 25th in the solar calendar every year. It is suggested that the questioner Baidu search the temperature in Yinchuan in February 20 16 and June 20 17. The lowest temperature at night after Christmas on February 25th was found to be-0/5 degrees, and the actual outdoor temperature at night was 2-3 degrees lower than the weather forecast. Because the weather forecast is the louver temperature, the actual outdoor temperature will be lower than the louver temperature.