串珠岩溶和富水不良地质桩基成孔技术探讨

The exploration of the pile hole construction technique in the rosary karst and the bad geographical places with rich underground water

通过武广客运专线新村1号大桥工程施工实践,针对串珠岩溶、富水不良地质条件下钻孔施工,对影响桩基成孔进度的原因进行了分析,提出了从地表注浆、下钢护筒、调整泥浆参数以及其他改善施工工艺的方法,介绍了溶洞处理措施。

Based on the construction practice in Xincun No. 1 bridge construction of the special line between Wuhan and Guangzhou, the paper analyzes reasons which affect the pile hole process aiming at the piling conditions in the rosary karst and the bad geographical places with rich underground water, points out methods from the surface grouting, the driven down steel protective pipe, the adjustment of the slop parameter, and other improvement construction crafts, and introduces the karst treatment measures.