岩土力学 ›› 2020, Vol. 41 ›› Issue (1): 57-66.doi: 10.16285/j.rsm.2018.2275

• 基础理论与实验研究 • 上一篇    下一篇

常法向刚度条件下岩石节理剪切−渗 流特性试验研究

夏才初，喻强锋，钱 鑫，桂 洋，庄小清   

  1. 同济大学 土木工程学院 地下建筑与工程系，上海 200092
  • 收稿日期:2018-12-16 修回日期:2019-06-17 出版日期:2020-01-13 发布日期:2020-01-05
  • 作者简介:夏才初，男，1963年生，博士，教授，博士研究生导师，主要从事岩石节理力学性质、冻涨岩石裂隙力学性质、软岩大变形等方面的研究工作。
  • 基金资助:
    国家自然科学基金（No. 41327001，No.51778475）

Experimental study of shear-seepage behaviour of rock joints under constant normal stiffness

XIA Cai-chu, YU Qiang-feng, QIAN Xin, GUI Yang, ZHUANG Xiao-qing   

  1. Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China
  • Received:2018-12-16 Revised:2019-06-17 Online:2020-01-13 Published:2020-01-05
  • About author:First author: XIA Cai-chu, male, (1963-), PhD, Professor, Ph.D supervisor, mainly engaged in the researches of mechanical properties of rock joints, crack mechanical properties of the frozen-swelling and large deformation behavior of soft rockmass. E-mail: tjxiaccb@126.com
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (41327001, 51778475).

PDF (Chinese)

298

PDF (English)

28

摘要： 为研究常刚度（CNS）边界条件下节理的剪切-渗流耦合特性，针对3种不同节理粗糙度的复制节理试样进行了3种不同刚度、3种不同渗透水压力条件下的剪切-渗流试验，全面系统地分析了法向刚度、渗透水压和节理粗糙度等因素对节理剪切过程中力学特性和渗流特性的影响。试验结果表明：节理峰值剪切强度随法向刚度的增加而增加，流量、等效水力开度和透过率随法向刚度的增加而减小；节理峰值剪切强度和法向位移均随渗透水压的增大而减小，流量、等效水力开度和透过率随法向刚度的增加而增加；通过节理面的流量随节理粗糙度的增加而减小。剪切过程中流量、等效水力开度和透过率均呈现类似于节理剪胀的三阶段变化规律：快速增长阶段、增速变缓阶段和稳定阶段；稳定阶段流量随法向刚度和渗透水压的变化近似呈线性关系，随着渗透水压的增加，粗糙程度较高的节理流速较慢。

关键词: 节理, 剪切-渗流耦合特性, 法向刚度, 渗透水压, 节理粗糙度

Abstract: In order to study the shear-flow coupling characteristics of joints under constant normal stiffness (CNS) boundary condition, the shear-flow coupling tests under three different stiffness and seepage pressure settings were carried out for duplicate joint specimens with three different joint roughnesses. Meanwhile, the effects of normal stiffness, seepage pressure and joint roughness on the mechanical properties and seepage characteristics in joint shearing process were systematically analyzed. The test results indicate that the peak shear strength of joint increases with the increase of normal stiffness, while the flow rate, equivalent hydraulic aperture and transmissivity decrease with the increase of normal stiffness; and the flow rate of seepage through joint surfaces during shearing process decreases with the increase of joint roughness. A three-stage change rule of flow rate that is similar to the joint dilatancy is shown in the shearing process: rapid growth stage, slow growth stage, and stable stage. The same rule has also been observed in equivalent hydraulic aperture and transmissivity. During the stable stage, the flow rate is approximately linear with the variation of the normal stiffness and seepage pressure, and the joints with higher roughness present lower flow rate as the seepage pressure increases.

Key words: joints, shear-seepage coupling behaviour, normal stiffness, seepage pressure, joint roughness

中图分类号: 

  • TU 452
[1] 黄巍, 肖维民, 田梦婷, 张林浩, . 不规则柱状节理岩体力学特性模型试验研究[J]. 岩土力学, 2020, 41(7): 2349-2359.
[2] 张茂础, 盛谦, 崔臻, 马亚丽娜, 周光新. 岩石材料抗拉强度与劈裂节理面形貌的 加载速率效应研究[J]. 岩土力学, 2020, 41(4): 1169-1178.
[3] 王培涛, 黄正均, 任奋华, 章亮, 蔡美峰, . 基于3D打印的含复杂节理岩石直剪特性 及破坏机制研究[J]. 岩土力学, 2020, 41(1): 46-56.
[4] 高青鹏, 曹 平, 王 飞, 王 柱. 压剪作用下多节理类岩试样力学性质及破坏判据[J]. 岩土力学, 2019, 40(3): 1013-1022.
[5] 徐栋栋, 邬爱清, 李 聪, 汪 斌, 蒋昱州, 曾 平, 杨永涛, . 破裂全过程模拟的改进非连续变形分析方法[J]. 岩土力学, 2019, 40(3): 1169-1178.
[6] 柯志强, 王环玲, 徐卫亚, 林志南, 吉 华, . 含横向节理的柱状节理岩体力学特性试验研究[J]. 岩土力学, 2019, 40(2): 660-667.
[7] 孙钱程, 郑民总, 李邵军, 郭浩森, 程 远, 裴书锋, 江 权, . 柱状节理岩体隧洞松弛深度的 变异特性与确定方法[J]. 岩土力学, 2019, 40(2): 728-736.
[8] 王本鑫, 金爱兵, 赵怡晴, 王贺, 孙浩, 刘佳伟, 魏余栋, . 基于CT扫描的含非贯通节理3D打印试件 破裂规律试验研究[J]. 岩土力学, 2019, 40(10): 3920-3927.
[9] 冯 立, 张茂省, 胡 炜, 董 英, 孟晓捷. 黄土垂直节理细微观特征及发育机制探讨[J]. 岩土力学, 2019, 40(1): 235-244.
[10] 陈 曦, 曾亚武, 孙翰卿, 任树林, 刘 伟. 岩石节理峰值抗剪强度新模型[J]. 岩土力学, 2018, 39(S2): 123-130.
[11] 刘 港，马凤山，赵海军，冯雪磊，郭 捷,. 考虑统计损伤模型的非均质节理岩体拉剪破坏机制研究[J]. , 2018, 39(S1): 9-20.
[12] 杨圣奇，陆家炜，田文岭，唐劲舟,. 不同节理粗糙度类岩石材料三轴压缩力学特性试验研究[J]. , 2018, 39(S1): 21-32.
[13] 李正伟，张延军，张 驰，许天福，. 花岗岩单裂隙渗流传热特性试验[J]. , 2018, 39(9): 3261-3269.
[14] 翟明磊，郭保华，李冰洋，焦 峰,. 岩石节理分级剪切加载-蠕变-卸载的能量与变形特征[J]. , 2018, 39(8): 2865-2872.
[15] 卞 康，刘 建，胡训健，李鹏程，陈玲朱，刘振平, . 含顺层断续节理岩质边坡地震作用下的破坏模式与动力响应研究[J]. , 2018, 39(8): 3029-3037.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
版权所有 © 《岩土力学》编辑部
地址：湖北武汉武昌小洪山中国科学院武汉岩土力学研究所(430071)　邮编：200042　电话：027-87198484, 87199252, 87199253, 87198752　E-mail: ytlx@whrsm.ac.cn
本系统由北京玛格泰克科技发展有限公司设计开发