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一、事前控制的做法事前控制是工程质量及施工安全的必要前提,应在以下方面加以严格控制:（1）认真审核施工方案,主要内客包括选用的机械设备数量、型号,施工作业人员组织及特殊工种上岗证,施工现场平面布置及打桩施工顺序,施工技术措施及有关参数指标,工程进度计划等;（2）核查施工必备的检测工具和仪器的准备工作,经纬仪、水准仪和钢卷尺准确有效（检查年检证的有效期）,测绳锯锤、坍落度量衡和磅秤等齐全;（3）严控材料的使用,砂、石、水泥、钢材和焊接接头以及桩身混凝土配比严
First, the practice of pre-control Pre-control is the necessary prerequisite for project quality and construction safety should be strictly controlled in the following areas: (1) carefully review the construction program, the main guest, including the number of selected mechanical equipment, model, construction workers organization And special job identification card, construction site layout and piling construction sequence, construction technical measures and related parameters indicators, project schedule, etc .; (2) check the construction of the necessary testing tools and equipment preparation, theodolite, level and steel tape measure Accurate and effective (check the validity of the annual inspection certificate), rope saw hammer, slump weigher and scales, etc .; (3) strict control of the use of materials, sand, stone, cement, steel and welded joints and concrete mix ratio