岩石河床水中桥基础钢板桩围堰施工技术

摘要

钢板桩围堰一般都适应于河床为泥沙等软弱覆盖层，钢板桩能打设到承台以下，本案例河床为裸露岩石，钢板桩不能插打入岩层，只能立于河床表面，钢护筒也不能直接插打入河床，本案成功地解决了此难题，对类似工程很有借鉴价值。%Steel sheet pile cofferdam is generally adapted to the riverbed with silt soft cover,the steel sheet pile can be set below the pile caps.In this case,because of bare rocky riverbed,the steel sheet pile could only be set on the riverbed sur-face rather than inserted into the rock,moreover,steel protecting tube could not be directly inserted into the riverbed.This case successfully solved the above problems,it could be a great reference value for similar projects.