下载后可任意编辑五、Winter construction measures 冬季施工措施1. Reinforcing bar engineering 钢筋工程1.1 In a negative temperature conditions, its mechanical performance of reinforced to change, so winter of the construction should take appropriate measures to ensure the construction quality. Steel processing, cold pull, welding should take block rain, wind in a setting on the windshield etc在负温条件下的钢筋，其力学性能要发生变化，故冬期施工时应实行妥善的措施以确保施工质量。钢筋的加工、冷拉、焊接应实行遮雨、在上风向处设置挡风等措施。1.2 Negative temperature conditions reinforced cold pull environmental temperature should not be below - 20 ℃. The elongation according to the control method to determine the control负温条件下钢筋冷拉环境温度不得低于–20℃。其伸长率的控制按所采纳的控制方法确定。1.3 Negative temperature conditions steel welding environment temperature may not be less than 20 ℃, and at the same time -- should be rainproof, snow shelter measures. After welding joints, forbidden immediately encounter ice and snow负温条件下钢筋焊接环境温度不得低于–20℃，同时应有防雨、雪挡风措施。焊后的接头，严禁立即碰到冰雪。2. Concrete projects 砼工程The winter of concrete engineering construction, from the construction period, based on the temperature quality, speed up progress premise, choose appropriate construction measures砼工程的冬期施工，要从施工期间的气温出发，在保证质量、加快进度前提下，选择适宜的施工措施。2.1、Use of the cement concrete casting choose ordinary Portland 下载后可任意编辑cement. Cement label not below P.o 3.25 level. Every cubic concrete 300kg dosage of cement shoulds not be less than. Aggregate must be clean, and shall not contain ice and snow and frozen pieces 对砼浇筑使用的水泥选用普通硅酸盐水泥。水泥标号不低于 P.o 32.5级。每立方混凝土中水泥用量不宜少于 300kg。骨...
