岩溶场地大面积灌注桩事故的加固处理

Reinforcement of Massive Cast-in-place Piles Accident in Karst Area

某工程在岩溶场地上进行灌注桩施工,由于桩底溶洞的存在引起大批灌注桩的竖向承载力不满足设计要求,采用刚性-亚刚性复合地基法成功处理了该事故,即将原灌注桩作为刚性桩,新增长螺旋灌注桩作为亚刚性桩共同承载,加固处理后,复合地基承载力满足规范和设计要求。

When the cast-in-place piles construction occurs in karst area, the vertical hearing capacity of massive cast-in- place piles fail to meet the design requirements due to the caves under the piles. Therefore, this thesis discusses a rigid and semi-rigid composite foundation method, mixing the former cast-in-place piles are taken as the rigid piles with the latter long-spiral piles are taken as the semi-rigid ones, which successfully avoids the piles accident.