一、 施工准备
（一） 作业条件
1、 地基土质情况，钎探、地基处理、基础轴线尺寸、基底标高情况等均经过勘察、设计、监理单位验收，并办理完隐检手续。
2、 完成基槽验线，办完验收手续。
3、 地下降水工作完成，具备施工条件。
4、 根据设计及规范要求进行，校核混凝土配合比，做完混凝土配合比试配。原材料的复试、台秤经校准、检定合格，准备好混凝土试模。
（二） 材质要求
1、 水泥：水泥品种、强度等级应根据设计要求确定。质量符合现行水泥标准。工期紧时可做水泥快测。
2、 砂、石子：根据结构尺寸、钢筋密度、混凝±工程施工工艺、混凝土强度等级的要求确定石子粒径、砂子细度。砂、石质量符合现行标准。
3、 水：自来水或不含有害物质的洁净水。
4、 外加剂：根据施工组织设计要求，确定是否采用外加剂。外加剂必须经试验合格后，方可在工程上使用。
5、 掺合料：根据施工组织设计要求，确定是否采用掺合料，质量符合现行标准。
6、 钢筋：钢筋的级别、规格必须符合设计要求，质量符合现行标准。

First, construction preparation
(A) Operating conditions
1, foundation soil conditions, drill exploration, ground handling, basic axis size, basement level will be well after the investigation, design, supervision and inspection unit, and go through the complete inspection procedures implicit.
2, complete the foundation trench inspection line, after finishing acceptance procedures.
3, groundwater pumping and completed, with construction conditions.
4, according to the design and specification requirements, check concrete mix, finished with a test of concrete. Re-testing of raw materials, platform scale by calibration, test qualified, ready concrete tryout.
(B) material requirements
1 cement: cement variety, intensity levels shall be determined according to design requirements. Meet current standards of quality cement. Tight time schedule can do quick measure of cement.
2, sand, gravel: According to the structure, size, steel density, coagulation ± engineering construction techniques, concrete strength requirements determine the size of gravel, sand fineness. Sand, stone quality meets current standards.
3, Water: tap water or clean water free of harmful substances.
4, admixture: According to the construction organization design requirements, determine whether the use of additives. Additives must be approved by test-requisite for use in engineering.
5, admixture: According to the construction organization design requirements, to determine whether use of admixtures, the quality of the current standard.
6, steel: steel grade, size must meet the design requirements, quality meets current standards.