岩溶地区钻孔灌注桩基础下沉事故处理

Accident Treatment of Borehole Cast-in-Place Concrete Pile Foundation Sinking in Karst Areas

某钻孔灌注桩基础在主体施工阶段出现桩基础下沉,通过先后对该工程采取桩端压力注浆方案和补桩加承台方案进行处理,其经验可供类似工程借鉴.

A certain borehole cast - in- place concrete pile foundation sank during the construction of the main part of the project. The accident was successfully treated through successively taking the measures of pressured grouting on the pile top and pile reinforcement to plus a bearing platform. The accident and its treatment are described in this paper might be used as reference to dealing with similar works in the future.