预应力高强度混凝土管桩桩身受力特性测试技术研究进展  

CURRENT STATUS AND PROSPECTS OF TEST TECHNIQUES FOR PRESTRESSED HIGH STRENGTH CONCRETE PIPE PILE

作　　者：马加骁 张明义[1,2] 王永洪 MA Jiaxiao;ZHANG Mingyi;WANG Yonghong(School of Civil Engineering,Qingdao Technological University,Qingdao 266033,China;Collaborative Innovation Center for Engineering Construction and Safety of Blue Economic Zone,Qingdao 266033,China)

机构地区：[1]青岛理工大学土木工程学院,青岛266033 [2]山东省高等学校蓝色经济区工程建设与安全协同创新中心,青岛266033

出　　处：《工程地质学报》2020年第4期896-906,共11页Journal of Engineering Geology

基　　金：国家自然科学基金项目(资助号:4177231,51778312,51809146);山东省重点研发计划项目(资助号:2017GSF16107,2018GSF117010,2018GSF117008)。

摘　　要：预应力高强度混凝土管桩(PHC管桩)受制作工艺复杂、桩身结构独特、沉桩阻力较大等因素的影响,其桩身受力特性的测试存在诸多难点。目前PHC管桩桩身受力测试技术可分为4类:点法监测、线法监测、全分布式光纤监测、准分布式光纤光栅监测。本文对PHC管桩测试技术的原理、优缺点、应用现状、相关传感器的安装方法等方面进行梳理和总结,探讨了现用于PHC管桩测试技术及安装方法存在的问题。分析表明:基于布里渊散射原理的全分布式光纤监测与光纤布拉格光栅准分布式监测拥有更高的测试精度、更广的监测范围、更好的监测效果。光纤与桩身的变形协调、埋设光纤存活率、安装对桩身性状的影响等问题是未来PHC管桩桩身受力测试技术领域的研究热点。There are many difficulties in testing the mechanical properties of prestressed high strength(PHC)pipe pile,because of the complicated production process,unique pile structure and large pile resistance.At present,the test techniques for testing the mechanical properties of PHC pipe pile can be divided into four categories:point monitoring,linear monitoring,distributed optical fiber monitoring,and quasi-distributed fiber bragg grating monitoring.This paper summarizes the principle,advantages and disadvantages,application status of the test technology for PHC pipe pile,as well as the installation method of related sensors.It further discusses the problems existing in the test technology and installation method.The analysis indicates that distributed optical fiber monitoring and quasi-distributed fiber bragg grating monitoring have higher test accuracy,wider monitoring range and better monitoring results.The coordination of deformation between optical fiber and pile body,survival rate of the installed fiber and impact of installation on PHC pipe pile are the hot research topics in the future.

关 键 词：PHC管桩 测试技术 监测元件 应力-应变 安装方法 

分 类 号：P642.13[天文地球—工程地质学]