基坑水平内支撑下桩基施工超前试桩技术  

Advanced Test Technology of Pile Foundation Construction under Horizontal Support of Foundation Pit

作　　者：刘鹏鹏 LIU Pengpeng(Gansu Sixth Construction Group Co.,Ltd.,Lanzhou Gansu 730030,China)

机构地区：[1]甘肃第六建设集团股份有限公司,甘肃兰州730030

出　　处：《工程质量》2024年第4期103-107,共5页Construction Quality

基　　金：甘肃省住房和城乡建设厅科技计划项目(JK2021-58);甘肃省建设投资(控股)集团有限公司科技计划项目(JTKE-2020-14)。

摘　　要：某深基坑工程支护结构采用排桩+三道双层水平预应力鱼腹式钢支撑体系,由于基坑内大量水平支撑构件的存在,导致桩基施工前试桩作业因空间限制无法正常施工或工期拖延。针对这一施工难题,论文结合工程案例,对施工顺序进行了创新优化,采取在首道水平内支撑安装前施工桩基试桩的方法,并通过一系列试验进一步论证了超前试桩技术的可行性与适用性,以期为桩基施工提供思路和参考。The supporting structure of a deep foundation pit engineering adopts pile row+three double-layer horizontal prestressed fish-belly steel supporting system.Due to the existence of a large number of horizontal supporting members in the foundation pit,the pile test operation before construction cannot be constructed normally or the construction period is delayed due to the space limitation.In view of this construction problem,this paper combined with engineering cases,carried out innovative optimization of the construction sequence,adopted the method of building pile foundation test pile before the installation of the first horizontal support,and further demonstrated the feasibility and applicability of advanced test pile technology through a series of tests,in order to provide ideas and references for pile foundation construction.

关 键 词：内支撑 锚桩 钢筋应力计 超前试桩 静载试验 

分 类 号：TU473[建筑科学—结构工程]