文档介绍：轻型井点降水
施
工
方
案
××工程公司
年月日
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
工程概况
本期设计为2×600MW亚临界汽轮发电机组。
工程地质情况:本工程持力层采用③圆砾层做持力层,③圆砾, ~, ~。④细中砂层, ~。~。⑤圆砾层分布于④层之下。 ~。⑥粘土(残积土),褐色,稍湿,坚硬,覆于凝灰岩之上。。
编制依据
《火电施工质量检验及评定标准》
《电力建设施工及验收技术规范》
《建筑施工计算手册》
临时土方开挖图纸
降水方案选择
该项目地处伊敏河畔,属砂砾地质结构,渗透系数为150m/天,容水量大,受降水影响地下水位波动变幅1-2m 。枯水期在-6m左右。而本工程大部分建筑物埋深在-6m,处于临界状态,丰水期就无法施工,本工程采取的措施是:采用明沟、集水井的方式进行作业层表面水的降水。在枯水期柱、基础底脚施工完、回填完,防止丰水期淹没,以减少降水施工的降水费用。基础埋深超过-6m的,采用局部井点降水。
本工程主厂房基础底标高为-,不须采用井点降水,而循环水泵坑及汽轮机基础底标高为-,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,