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一、前言由于我国的领土辽阔,有相当大的区域在冬季气温处于冰点以下,北方地区可达4个月以上。低温对混凝土工程的正常进行极为不利,甚至能造成工程破坏事故。因此,对于寒冷气温条件下的混凝土工程的施工,必须特别注意气温条件的变化。在我国现行施工验收规范中,规定了当昼夜室外平均气温低于+5℃和最低气温低于-3℃时,要按冬季施工法进行施工。
I. INTRODUCTION Due to the vast territory of China, there is a fairly large area where the winter temperature is below the freezing point and the northern region can reach more than 4 months. Low temperatures are extremely unfavorable to the normal operation of concrete projects and can even cause accidents in engineering destruction. Therefore, special attention must be paid to changes in air temperature conditions for the construction of concrete works under conditions of cold temperatures. In China’s current construction acceptance standards, it is stipulated that when the average day-night outdoor temperature is lower than +5°C and the minimum temperature is lower than -3°C, construction shall be carried out according to the winter construction method.