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凡大气温度日最低温度低于+10℃时即转入低温施工。一般工程当室外平均气温低于+5℃及最低气温低于-3℃时,即转入冬期施工。当次年初春连续七昼夜不出现负温度时,即转入常温施工。一、冬期施工主要技术措施 1.土方工程 (1)新开工程应先争取在上冻前开挖完土力,若条件不具备,可先用推土机松土,以后再行开挖 (2)回填基槽、房心和管沟时,应遵守下列规定: 1)基槽(坑)回填上中冻块含量不得超过回填土总体积的15％,冻块粒径应小于15厘米。 2)灰土所用土壤不得含有冻土块,并采用
When the minimum temperature of the atmospheric temperature is lower than +10°C, it is transferred to low temperature construction. General works When the outdoor average temperature is lower than +5°C and the minimum temperature is lower than -3°C, it is transferred to the winter construction. When there is no negative temperature for seven consecutive nights in the spring of the following year, it is transferred to room temperature construction. First, the winter construction of the main technical measures 1. Earthworks (1) The new project should first strive to excavate before the completion of earth pressure, if the conditions do not have, you can first use bulldozers loose soil, excavation later (2) backfill When base troughs, chamber cores, and trenches are to be used, the following regulations shall be observed: 1) The content of frozen blocks in the base tank (pit) shall not exceed 15% of the total volume of the backfill soil, and the diameter of the frozen block shall be less than 15 cm. 2) The soil used for the lime soil must not contain frozen soil blocks and be used