基于底摩擦试验的缓倾边坡滑移拉裂破坏过程研究
Research on the Sliding and Tensile Failure Process of Gently Inclined Slopes Based on Bottom Friction Tests
黄厚赞 1梁柱 2陈凌伟 2谭建辉 2刘伟 2张庆华 2米冠宇3
作者信息
- 1. 广州市城市规划勘测设计研究院,广东广州 510060;广东省城市感知与监测预警企业重点实验室,广东广州 510060;成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都 610059
- 2. 广州市城市规划勘测设计研究院,广东广州 510060;广东省城市感知与监测预警企业重点实验室,广东广州 510060
- 3. 成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都 610059
- 折叠
摘要
顺层边坡一旦失稳,具有规模大、危害性强的特点.针对缓倾顺层边坡滑移—拉裂型破坏,采用底摩擦物理模型试验,结合PIV粒子成像技术以及MATLAB后处理方法,分析了缓倾顺层边坡滑移—拉裂型破坏过程中的宏微观特征.研究结果表明:PIV和MATLAB的后处理所得结果与宏观观察结果相吻合,计算结果能够反映出不同边坡结构下的位移矢量特征,并对变形特征进行分区;滑移—拉裂式破坏过程分为三个阶段,裂缝产生阶段、裂缝扩展阶段和破坏阶段.裂缝产生阶段边坡后缘首先产生竖向张拉裂隙,裂缝扩展阶段裂缝向深部扩展,破坏阶段边坡上部岩体沿层面中的软弱结构面滑动.对缓倾边坡滑移拉裂破坏过程的研究成果,能够为类似边坡的滑动机制分析提供一定参考.
Abstract
Once the bedding slope loses stability,it has the charac-teristics of large scale and strong harm.In response to the sliding tensile failure of gently inclined bedding slopes,bottom friction physical model experiments were conducted,combined with PIV particle imaging technology and MATLAB post-processing meth-ods,to analyze the macro and micro characteristics of the sliding tensile failure process of gently inclined bedding slopes.The re-sults show that the post-processing results of PIV and MATLAB are consistent with the macroscopic observation results,and the calculation results can reflect the displacement vector characteris-tics under different slope structures.At the same time,the deforma-tion characteristics were divided into three stages:crack generation stage,crack propagation stage,and failure stage.During the stage of crack formation,vertical tensile cracks first appear at the rear edge of the slope.During the crack propagation stage,the cracks extend deeper,while during the failure stage,the upper rock mass of the slope slides along the weak structural planes in the bedding plane.The research results of this article on the sliding and tensile failure process of gently inclined slopes can provide some refer-ence for the analysis of sliding mechanisms of similar slopes.
关键词
缓倾边坡/滑移拉裂/底摩擦试验/破坏过程/PIVKey words
gently inclined slopes/slipping and tearing/bottom friction test/destruction process/PIV引用本文复制引用
基金项目
广东省重点领域研发计划(2020B0101130009)
广东省城市感知与监测预警企业重点实验室基金项目(2020B121202019)
广东省自然资源厅科技项目(2022岩28019F)
广州市城市规划勘测设计研究院科技基金项目(RDI2210204146)
广州市城市规划勘测设计研究院科技基金项目(RDP2220204022)
广州市城市规划勘测设计研究院科技基金项目(RDI2220204031)
广州市城市规划勘测设计研究院科技基金项目(RDI2220204125)
广州市城市规划勘测设计研究院科技基金项目(RDI2220204125)
出版年
2024
NETL
NSTL
万方数据