本工程主厂房基础底标高为-5.0m，不须采用井点降水，而循环水泵坑及汽轮机基础底标高为-7.5m，可采用轻型井点降水。基础平面基底长度约为50m，宽度约为36m。基础埋深为见施工图，地面持力层为圆砾层，井点降水可以避免大量涌水、冒泥、翻浆，而且在砂砾地层中开挖基坑时，可防止流砂现象发生，渗流向下改善土的性质，使基底土质更加密实，结合本工程基础施工主要在枯水期期间，周期较长的特点，采用轻型井点降水法，沿建筑物环状布置进行人工降水。同时基坑二角设集水箱配合4台QY-3.5型潜水泵排除明水的方法。
目录
一、工程概况 ···································································2
二、编制依据· ···································································2
三、降水方案选择·······························································2
四、井点降水相关计算·························································3
五、主要降水设备·······························································6
六、施工工期·····································································7
七、井点施工方法·······························································7
八、质量标准及质量保证措施················································8
九、危险点分析································································10
十、安全生产及文明施工措施···············································10
十一、环保措施································································11