摘要
为研究灌浆体周围岩土体的约束效应对灌浆体受压承载力的影响,开展8组室内模型试验.试验结果表明:灌浆体的受压承载力受围限体的约束效应影响显著,并随着围限体直径的增大而显著增加;灌浆体受压破坏时,底部呈倒圆锥形破坏形态,围限体主要被3条径向贯通裂缝分割为3块,相邻裂缝夹角近似呈120°.基于试验现象,建立灌浆体受压承载力计算的压锥模型,进一步提出灌浆体受压承载力计算方法,计算结果与试验结果较为吻合.
Eight groups of laboratory model tests are carried out in order to study the restraint effect of the rock mass around the grout body on the compressive capacity of the grout body.The test results show that the compressive capacity of the grout body is affected significantly by the restraint effect of restraint body,and increases greatly as the diameter of restraint body increases.When the grout body is destroyed under compression,the bottom is in the form of inverted conical failure,and the restraint body is divided into three blocks by three radial penetrating cracks,the included angle of adjacent cracks is approximately 120°.Based on the test phenomena,compression-cone model for calculating compressive capacity of the grout body is established,and the calculation method for compressive capacity of the grout body is put forward.The calculation results are in agreement with the test results.
作者
冉孟吉
涂兵雄
刘超
贾金青
蔡燕燕
张丽华
RAN Mengji;TU Bingxiong;LIU Chao;JIA Jinqing;CAI Yanyan;ZHANG Lihua(Fujian Research Center for Tunneling and Urban Underground Space Engineering,Huaqiao University,Xiamen 361021,China;State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China;Capol International and Associates Group Guangzhou Branch,Guangzhou 510655,China;Key Laboratory for Intelligent Infrastructure and Monitoring of Fujian Province,Huaqiao University,Xiamen 361021,China)
出处
《华侨大学学报（自然科学版）》
CAS
2021年第6期748-757,共10页
Journal of Huaqiao University(Natural Science)
基金
国家自然科学基金资助项目(51408242,51678112)
国家重点研发计划项目(2018YFC1505302)
中国博士后科学基金资助项目(2016M592082)
大连理工大学海岸和近海工程国家重点实验室开放基金资助项目(LP2013)。
关键词
压力型锚杆
灌浆体
受压承载力
模型试验
compression-type anchor
grout body
compressive capacity
model test
