超深全岩地质复合接力钻孔灌注桩施工

Abstract The construction example of the extra-large bridge bored pile construction in Xiliu River is introduced in this article.Problems including retaining cylinder bottom slurry leakage easy standard exceeding of the extra-large total rock geological hole verticalityand hard rock's damage to the drilling tools and of 2.5m diameter extra-deep perfusion pile pouring are discussed in this paper.院二次对中 底口漏浆 垂直度 掉钻 混凝土灌注Key words second time centering bottom slurry leakage verticality drills concrete spouting中图分类号院U443.15+4 文献标识码院A 文章编号院1006-4311（2014）01-0113-021 工程概况流溪河特大桥钻孔灌注桩工程是新建铁路新广州站及相关工程ZQ-1 标段基桩工程项目。位于广州与佛山里水交界处。