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.
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
关键词
高地下水位
管井法
降水
措施
high water table
tube-well method
dewatering
measures
