无反力条件下锚杆静压桩的设计与施工  

Design and construction of anchor jacked piles under no reaction force conditions

作　　者：乔国华[1] 周森[1] 

机构地区：[1]广东省煤炭建设(集团)有限公司,广州510100

出　　处：《工程勘察》2012年第11期50-54,共5页Geotechnical Investigation & Surveying

摘　　要：锚杆静压桩是一项成熟的基础加固托换技术,在狭小空间内更显其长,但它往往受到基础反力的局限,若没有被加固基础提供反力,就无法进行压桩施工。本文结合广东某综合性大学二级学院学生宿舍楼不均匀沉降加固实例,对锚杆静压桩的工作原理及沉桩机理进行了分析,探讨了锚杆静压桩设计参数的计算和取值原则,详细介绍了无反力条件下锚杆静压桩的设计与施工技术。沉降观测结果表明,加固方案对控制基础不均匀沉降起到了良好作用,为类似工程问题提供了参考经验。The anchor jacked piles are the fully-developed underpinning technique for reinforced foundations,which are specially effect in narrow spaces,but they are confined to the reaction forces and can not be pressed in if they are not supported from the reinforced foundations.The uneven settlement reinforcement of the dormitory complexes of certain university in Guangdong province is taken as an example to introduce the construction process and design of anchor jacked piles under no reaction force conditions.The calculation methods and the construction parameters for the anchor jacked piles are discussed based on the working principle and mechanism of the pile penetration.The monitoring observations show that the uneven settlement of the foundation tends to be stable after the completion of the pile penetration.The techniques used in the case can be as the reference for the similar projects.

关 键 词：锚杆静压桩 机理分析 基础加固 

分 类 号：TU437.1[建筑科学—岩土工程]