流塑状淤泥中大型泵房沉井的设计与施工

在流塑状淤泥中实施沉井工程，极易产生突沉、偏沉、反涌和超沉不止等问题，施工操作极难把握。通过方案比选，设计采用在沉井刃脚下预先打入水泥深层搅拌桩，形成联排桩式的地下连续墙结构，对于沉井井壁形成具有一定强度的承拖和支撑墙体，使沉井在淤泥中下沉的过程成为一个可控的工艺，成功地解决了这一工程难题。

Design And Construction Of Large Pump House Caisson Above Current-formed Silt

Performing caisson engineering in the current - formed silt will cause the problem of sudden and deflection subsidence, mud gushing. The design in this paper is to pump cement deep layer mixing pile under the caisson cutting edge＇ form underground diaphragm wall structure so as to form a supporting wall for the caisson wall and to control the sinking process of caisson in the silt.