前插板低桩承台结构设计及施工质量缺陷处理

Design of low pile cap structure of front inserted plate and treatment for construction quality defect

因岩面较高及周边建构筑物限制,打入预制桩不可行、全面大开挖换填基础经济性较差,前插板低桩承台结构成为首选,该结构综合了遮帘式结构和卸荷式结构的优点,经时间检验是成功的。介绍该结构设计要点及嵌岩灌注桩沉渣厚度超标的灌浆处理。

Because of the higher lock surface and restriction of the adjacent architectural structures,piling precast piles is infeasible,and entire excavation and replacement of foundation would be costly.The low pile cap structure of front inserted plate,which owns the advantages of cover-type structure and load-relieved structure,is preferred,which has been proved successful by practice.The design essentials of the structure and the sediment super-scale treatment by grouting for the cast-in-situ rock-socketed piles are expounded.