充填岩石节理法向闭合变形特性试验研究
Experimental research on the normal closure deformation of infilled rock joints
肖维民 1朱斌 1刘伟超 1朱占元2
作者信息
- 1. 四川农业大学土木工程学院,四川都江堰 611830;四川农业大学村镇建设防灾减灾四川省高等学校工程研究中心,四川都江堰 611830
- 2. 西昌学院土木与水利工程学院,四川西昌 615013
- 折叠
摘要
岩石节理法向闭合变形特性是影响岩体力学和渗流特性的关键因素之一,天然岩石节理中常常充填有砂等充填物而形成充填岩石节理.目前关于非充填岩石节理法向闭合变形特性的研究成果较为丰富,但针对充填岩石节理法向闭合变形特性的研究成果较为欠缺.为此,采用类岩石材料浇筑具有第5和8条Barton标准剖面线形貌特征的人工模拟岩石节理,以石英砂作为充填介质,制备具有9种充填度的人工模拟充填砂岩石节理试件,对其开展法向闭合变形试验,得到具有不同充填度人工模拟充填砂岩石节理试件的法向闭合变形曲线,在此基础上分析充填度对充填岩石节理法向闭合变形的影响,并采用幂函数分别拟合具有不同充填度的充填岩石节理法向闭合变形曲线和对应的最大法向闭合变形量,建立了充填岩石节理法向闭合变形幂函数经验模型和最大法向闭合变形量随充填度变化的幂函数经验公式.
Abstract
The normal closure of rock joint is one of the key factors affecting the mechanical and seepage behaviours of rock masses,and sand particles or other gouges are often filled in natural rock joint to form an infilled rock joint.However,there are abundant researches on the normal closure deformation of clean rock joints,while few researches on the normal closure of infilled rock joints have been reported.In this study,artificial rock joints with the morphology of the 5th and 8th Barton's standard profiles were prepared by using rock-like materials,and quartz sand was chosen as the filling material to prepare artificial sand-infilled rock joint specimens with nine filling degrees.Then laboratory normal closure tests were conducted on these artificial sand-infilled rock joint specimens and their normal closure curves were obtained.According to the experimental results,the influences of infilled material on the normal closure of sand-infilled rock joints were analysed,and the power function was used to fit the normal closure curve and the maximum normal closure of sand-infilled rock joints with different filling degrees,thus establishing the empirical normal closure model and the empirical maximum normal closure formula of the infilled rock joint,respectively.
关键词
岩石力学/充填岩石节理/法向闭合变形/充填度Key words
rock mechanics/infilled rock joint/normal closure deformation/filling degree引用本文复制引用
出版年
2024
NETL
NSTL
万方数据