裂隙对含孔洞岩体力学特性的影响的试验和数值模拟研究
EXPERIMENTAL AND NUMERICAL STUDY ON THE EFFECT OF FRACTURES ON THE MECHANICAL PROPERTIES OF ROCK MASS CONTAINING CAVITIES
丁尧 1林国进 1张程2
作者信息
- 1. 四川省公路规划勘察设计研究院有限公司,成都 610041
- 2. 成都理工大学环境与土木工程学院,成都 610059
- 折叠
摘要
为研究单轴压缩状态下裂隙对含孔洞岩体的力学特性的影响,对含孔洞及预制单一裂隙的水泥砂浆试件进行单轴压缩试验及数值模拟,研究预制裂隙倾角i、预制裂隙与孔洞距离m、预制裂隙长度l对试件的力学特性的影响.研究结果表明:(1)当固定其它参数不变时,抗压强度的试验值和数值模拟值随l的增加基本呈逐渐减小的趋势;当固定其它参数不变时,抗压强度的试验值和数值模拟值随裂隙倾角i的变化规律并不固定;固定其它参数不变时,抗压强度的试验值和数值模拟值随距离m的变化规律并不固定.(2)预制裂隙倾角的大小、预制裂隙至圆孔的距离m、预制裂隙长度l的大小对试件的主裂隙发展方向、破坏模式有影响.
Abstract
In order to study the effect of cracks on the mechanical properties of rock mass containing hole under uniaxial compression,uniaxial compression test and numerical simulation were performed on cement mortar specimens containing hole and prefabricated single crack,and the effects of the dip angle i of prefabricated crack,the distance m between the prefabricated crack and hole,the length l of prefabricated crack on the mechanical properties of the specimen was studied.The research results show that when other parameters are constant,the experimental value and numerical simulation value of compressive strength basically show a gradually decreasing trend with the increase of l.When other parameters are constant,the variation law of the experimental value and numerical simulation value of uniaxial compressive strength with the dip angle i of prefabricated crack is not fixed.When other parameters are constant,the variation law of the experimental value and numerical simulation value of uniaxial compressive strength with the distance m is not fixed.The dip angle i of prefabricated crack,the distance m between the prefabricated crack and hole,and length l of the prefabricated crack have an influence on the development direction of the main crack and failure mode of the specimen.
关键词
类岩体/预制裂隙/力学特性Key words
artificial rock mass/prefabricated crack/mechanical properties引用本文复制引用
出版年
2024
NETL
NSTL
万方数据