洞庭湖余家台箱涵管桩封闭地下水施工技术

Construction technology of sealing groundwater by Yujiatai box culvert pile in Dongting Lake

为提高软基地基承载力,本文以湖南省洞庭湖北部水资源配置澧县补水工程为例,论述了管桩加装无缝锥形端头以封闭地下水的施工方法。这种方法既可有效改善软基的工程地质条件,又可预防地下水沿管桩空心内腔涌水出现水文地质问题,实现了施工基坑无积水。

The construction method of installing the seamless conical end of the pipe pile to seal groundwater is discussed in order to improve the bearing capacity of the soft base with water resources allocation Lixian County Water Compensation Project in the north of Dongting Lake of Hunan Province as an example in the paper.The method can not only improve the engineering geological conditions of the soft foundation effectively,but also prevent the hydrogeological problems of groundwater gushing water along the hollow inner cavity of the pipe pile so as to realize the foundation pit construction without water.