某工程引水隧洞出口镇墩的地基处理  

Foundation Treatment of Anchor Block at the Outlet of a Water Diversion Tunnel

作　　者：孙云峰 贺苏华 SUN Yunfeng;HE Suhua(Powerchina Zhongnan Engineering Corporation,Changsha 410014,China)

机构地区：[1]中国电建集团中南勘测设计研究院有限公司,湖南长沙410014

出　　处：《水电与新能源》2023年第5期43-46,共4页Hydropower and New Energy

摘　　要：某工程引水隧洞出口镇墩部位的堆积体埋深较深,且需回填厚度较大,同时出口镇墩内的岔管对地基的整体性均匀沉降要求较高,因此需对其地基进行处理,选择了旋喷桩复合地基对镇墩基础的处理方案。旋喷桩采用了双管法精心施工,施工过程中对本部位附近已形成的边坡和阀门井的影响可控。通过地基处理,出口镇墩部位的地基承载力和沉降均满足要求,可供类似工程地基处理参考。The soil deposit in the foundation of anchor block at the outlet of a water diversion tunnel is of a large depth.The required backfill of the anchor block is also very deep.While,the bifurcation pipe in the anchor block requires an overall uniform settlement of the foundation.Thus,a scheme of composite foundation with jet grouting pipes is selected for the foundation treatment of the anchor block.The jet grouting piles are carefully constructed with the double pipe method,as the impact of the construction process on the nearby slope and valve well is under control.With the treatment,the bearing capacity and the settlement of the anchor block foundation meet the requirements.It can be useful reference for the foundation treatment of similar projects.

关 键 词：镇墩 回填 旋喷桩复合地基 地基处理 沉降 

分 类 号：TV672.1[水利工程—水利水电工程]