高地下水位土方开挖降水施工  

Dewatering Construction in the Excavation at a High Water Table

作　　者：杨卫[1] 丛苹[2] 

机构地区：[1]中国水利水电第七工程局有限公司,河南焦作454000 [2]郑州大学,河南郑州450002

出　　处：《华北水利水电学院学报》2011年第5期122-124,共3页North China Institute of Water Conservancy and Hydroelectric Power

摘　　要：李河渠道倒虹吸开挖深度大,约20 m,低于地下水位17 m.倒虹吸开挖必须在相对干燥的环境中进行,故采用管井法将地下水位降至开挖面以下或截断地下水,避免施工时发生管涌或流土破坏地基.经抽水试验,应用管井法降水保证了基坑基本在干燥情况下施工,为相似地区的降水施工提供了借鉴.The excavation depth in the inverted siphon project of Lihe River is large and up to 20 m which is 17 m deeper than the water table.However,the inverted siphon excavation must be made in a relatively dry environment.In order to avoid destroying the foundation due to piping or quick soil in the construction,the tube-well method was used to dewater and make the water table down to the excavation face or cut off the groundwater.By the means of a pumping test,it manifested that application of the tube-well method had ensured the pit to be constructed under dry conditions.It would provide a reference for the dewatering construction in similar areas.

关 键 词：高地下水位 管井法 降水 措施 

分 类 号：TU473.8[建筑科学—结构工程]