静压PHC管桩承载特性的试验研究  

Experimental study on bearing behaviors of static pressed PHC pipe pile

作　　者：史永强 杨军 刘晓伟 SHI Yongqiang;YANG Jun;LIU Xiaowei(Liaoning Municipal Engineering Design and Research Institute Co.,Shenyang 110006,China;Guangzhou Municipal Engineering Testing Limited Company,Guangzhou 510520,China)

机构地区：[1]辽宁省市政工程设计研究院有限责任公司,辽宁沈阳110006 [2]广州市市政工程试验检测有限公司,广东广州510520

出　　处：《混凝土》2023年第11期196-199,205,共5页Concrete

基　　金：国家自然科学基金(10902073)。

摘　　要：基桩承载特性研究对合理地进行桩基设计、施工和试验都具有重要意义。辽沈地区应用静压PHC管桩多以桩侧为黏性土,桩端为砂类土的地层为主,且桩长多以中短桩为主,为满足辽宁省修订地方标准的需求,为揭示辽沈地区应用静压PHC管桩的区域特点,通过在桩端植入应变片的试验方案,根据辽沈地区典型地质条件下静压PHC管桩的静载荷试验及内力测试数据,分析了桩身压缩量与桩顶沉降的关系,各测试截面轴力及桩侧摩阻力随桩顶荷载的变化规律,桩侧摩阻力与桩顶沉降的关系,桩侧摩阻力与桩端阻力分担桩顶荷载比,研究了静压PHC管桩的承载特性和破坏模式。结果表明静压PHC管桩在辽沈地区应用有着明显的区域特点,是一种优势明显的桩基形式。The study of bearing behavior of pile is very important for design,construction and test.For most of static pressed PHC pipe pile engineering of Liao-Shen area,the pile side soil is cohesive soil and the pile end soil is sand,and the pile length is a middle length pile.To meet the demand of revision of the local code and to revealing the regional characters of PHC pipe pile of Liao-Shen area,it analysed the datas of static loading test and internal force test of static pressed PHC pipe pile in Liao-Shen area.On this basis,it further analysed the relationships between the compression of pile and pile top settlement,the developed law of test section axial stress and friction resistance with the changes of load on pile top,the relationship between friction resistance and pile top settlement,and the load sharing ratio of friction resistance and tip resistance.It reveals the bearing behavior and the failure pattern of static pressed PHC pipe pile.The results show that the regional characters of static pressed PHC pipe pile and advantages are very obvious.

关 键 词：静压PHC管桩 静载试验 内力测试 荷载传递 

分 类 号：TU528.73[建筑科学—建筑技术科学]