长螺旋桩机预钻孔在大直径管桩施工中的应用

On application of pre-drilling by long spiral pile extractor at large-diameter pipe pile construction

针对大直径预应力管桩在施工中出现的挤土上浮现象,通过某工程的静载试验,提出了采用长螺旋桩机预钻孔在大直径预应力管桩施工中运用的方法,达到确保单桩竖向承载力的效果,解决了大直径预应力管桩防止施工中挤土上浮的问题。

According to the floating up of compacted soil at the construction of large-diameter prestressed pipe pile, the study points out the application method for the pre-drilling by long spiral pile extractor at large-diameter pipe pile construction by having the static experiment of some project, so as to ensure the vertical loading capacity of the single pile and solve the problem of the floating up of compacted soil in the construction of the large-diameter pipe pile construction.