摘要
为了探究坡顶超载作用下含软弱结构面的锚固边坡承载特性,以软弱结构面长度为变量设计并制作完成了4组缩尺模型试验,借助位移计、轴力计等量测元件监测坡面位移、坡顶沉降和锚索轴力的发展规律,系统研究了软弱结构面发育对锚固边坡承载特性和变形行为的影响。试验结果表明:软弱结构面发育伴随着框架梁变形模式的改变,结构面较长时,框架梁会因坡体下滑而发生旋转,实际工程中应根据结构面发育情况合理选择边坡水平位移的监测点。同时,不同层位处锚索调动顺序与结构面长度存在关联。设计时宜根据结构面分布及发育趋势,异化不同层位处锚索预应力幅值。
To explore the bearing characteristics of the anchored slope with weak structural plane under the overloading on the slope top,four scaled model tests were designed and constructed with the length of weak structural surface as the variable.The linear variable differential transformers,tension indicators and other measuring components were used to monitored the development of the slope surface displacement,slope top settlement and anchor cable axial force.The influence of weak structural plane development on the bearing characteristics and deformation behavior of anchored slope was systematically studied.The test results show that the development of weak structural plane is accompanied by the change of deformation mode of frame beam.The slope with long structural plane under load causes the slope to slide down and then causes the frame beam to rotate.The monitoring points of the horizontal displacement of the slope should be reasonably selected according to the development of structural plane in engineering practice.Moreover,there is a relationship between the order of anchor cable mobilization at different layers and the length of structural plane.The designed prestress amplitudes of anchor cables at different layers should be dissimilated according to the distribution and development of structural planes in practice.
作者
苗晨曦
任景瑞
李耀峰
赵小军
王晓毅
赵强
MIAO Chenxi;REN Jingrui;LI Yaofeng;ZHAO Xiaojun;WANG Xiaoyi;ZHAO Qiang(College of Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Transportation Research Institute Group Co.,Ltd.,Taiyuan 030000,China;Huaneng Zuoquan Coal&Power Co.,Ltd.,Zuoquan 032600,China;Shanxi Transportation Holdings Group Co.,Ltd.,Lvliang South Highway Branch,Lvliang 032200,China)
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2023年第3期519-528,共10页
Journal of Guangxi University（Natural Science Edition）
基金
国家自然科学基金项目(52178341,51809191)
山西交通控股集团2020年度科技项目计划(20-JKKJ-11)
中国博士后科学基金资助项目(2019M661065)。
关键词
软弱结构面
锚固边坡
承载特性
模型试验
weak structural plane
anchored slope
bearing characteristic
model test
