高速公路桥梁自平衡桩基静载试验研究  

Research on the Static Load Test of Self-balanced Pile Foundation for Expressway Bridge

作　　者：李开正 刘斌 Li Kaizheng;Liu Bin(JSTI Group,Nanjing 210017,China)

机构地区：[1]苏交科集团股份有限公司,南京市210017

出　　处：《北方交通》2024年第12期24-28,共5页Northern Communications

摘　　要：结合通锡高速公路桥梁自平衡桩基静载试验,分析桩基在自平衡法试桩条件下的Q–s曲线等分布规律,以及桩底后压浆对桩基承载力的影响。对比设计桩基承载力和实测结果,优化设计桩基长度。研究认为,自平衡桩基静载试验充分利用桩基自身特点,使桩身自重、桩侧阻力及桩端阻力互相提供反力,试验安全性高、成本低且技术可靠性好。In combination with the static load test of the self-balanced pile foundation of the bridge over Tongxi expressway,the distribution law of Q-s curve and so on of the pile foundation under the condition of the self-balanced method for the test pile and the influence of post grouting at the bottom of the pile on the bearing capacity of the pile foundation are analyzed.The bearing capacity of the designed pile foundation and the measured results are compared,so as to optimize the length of the designed pile foundation.The research shows that,the static load test of the self-balanced pile foundation fully utilizes the characteristics of the pile foundation itself,allowing the self weight of the pile body,the lateral resistance of the pile,and the end resistance of the pile to provide mutual reaction force.The test has high safety,low cost,and good technical reliability.

关 键 词：桩基 自平衡 荷载箱 Q-S曲线 等效转换 压浆 

分 类 号：U443.15[建筑科学—桥梁与隧道工程]