北方地区冬季漫长、寒冷，最低气温可达零下40℃，给灌注桩的施工带来一定的难度，除了要保证在非寒冷期施工中技术要求之外，还要考虑气温对混凝土质量的影响。为了解决这个问题，在施工机械中要增加蒸发量100公斤／时以上的蒸汽炉、暖棚、热料坑等设备；在施工中注意生料的加 The northern region is long and cold in winter, and the minimum temperature can reach minus 40°C, which brings certain difficulties to the construction of the cast-in-place piles. In addition to ensuring the technical requirements during construction in the non-cold period, the influence of the temperature on the concrete quality must also be considered. In order to solve this problem, in the construction machinery, steam furnaces, warm sheds, hot pits and other equipment with an evaporation capacity of 100 kg/h or more must be added; attention should be paid to the addition of raw materials during construction.