模拟岩石节理试样剪切变形特征和破坏机制研究

›› 2008, Vol. 29 ›› Issue (7): 1741-1746.

模拟岩石节理试样剪切变形特征和破坏机制研究

李海波¹，刘博¹，冯海鹏^{1, 2}，张磊奇³

1.中国科学院武汉岩土力学研究所岩土力学与工程国家重点试验室，武汉 430071；2.中广核工程有限公司，深圳 518124； 3.河南省南阳市水利勘测设计院，南阳 473063

收稿日期:2007-06-18 出版日期:2008-07-10 发布日期:2013-07-27
作者简介:李海波，男，1969年生，博士，研究员，主要从事岩石动力学方面研究。
基金资助:
国家自然科学基金重点项目(No. 50439030)和国家十一五支撑项目（No. 2006BAB04A06）资助

Study of deformability behaviour and failure mechanism by simulating rock joints sample under different loading conditions

LI Hai-bo¹, LIU Bo¹, FENG Hai-peng^{1, 2}, ZHANG Lei-qi³

1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2 China Guangdong Nuclear Power Station Engineering Co., Ltd., Shenzhen 518124, China; 3. Nanyang Reconnaissance and Design institute, Nanyang, 473063, China

Received:2007-06-18 Online:2008-07-10 Published:2013-07-27

摘要/Abstract

摘要： 通过RMT－150C电伺服试验机，利用人工浇注素混凝土节理试样进行了不同剪切变形速率、法向应力和起伏角情况下的剪切试验，研究了节理破坏模式和刚度特征及其与起伏角、剪切变形速率和法向应力之间的关系。研究结果表明，试样破坏模式主要受起伏角控制，小起伏角情况下节理呈现磨损破坏模式，大起伏角情况下节理呈现剪断破坏模式，法向应力和剪切变形速率对节理破坏模式有一定的影响；节理的剪切刚度随剪切变形速率和起伏角的增大而增大，增大幅度随变形速率的增大有减小趋势；节理的剪切刚度随法向应力的增大而增大，基本呈线性关系。提出了考虑剪切速率和起伏角度影响的节理剪切刚度公式，并根据试验结果对剪切刚度公式进行了拟合。

关键词: 节理, 剪切速率, 剪切刚度, 破坏机制

Abstract: Through the RMT-150C testing system, artificial concrete joint samples are employed to study the shearing stiffness and failure mode for rock joint under different shearing deformation velocities, undulation angles and normal stresses. It is suggested that the failure modes of joint samples are dominated by the undulation angles. Under small undulation angle, the joint samples are in abrasion failure mode, while under high undulation angles, the joint samples are in snip failure mode. The failure modes of joint sample are also influenced by the normal stress and shearing deformation velocity. It is also reported that the shearing stiffnesses of joint samples increase with the increasing shearing deformation velocities and undulation angles; and the rising rates tend to decrease with the increment of shearing deformation velocities. As well, the shearing stiffnesses of joint samples linearly increase with the increasing normal stresses. The shear stiffness formula is further presented to consider the effect of shearing deformation velocity and undulation angle. Based on the experimental results, the regression results for the formula are also conducted.

Key words: joints, shearing velocity, shear stiffness, failure mechanism

中图分类号:

TU 458

李海波，刘博，冯海鹏，张磊奇 . 模拟岩石节理试样剪切变形特征和破坏机制研究[J]. , 2008, 29(7): 1741-1746.

LI Hai-bo , LIU Bo , FENG Hai-peng , ZHANG Lei-qi . Study of deformability behaviour and failure mechanism by simulating rock joints sample under different loading conditions[J]. , 2008, 29(7): 1741-1746.

参考文献

相关文章 15

[1]	周辉, 程广坦, 朱勇, 陈珺, 卢景景, 崔国建, 杨聘卿, . 大理岩规则齿形结构面剪切特性试验研究[J]. 岩土力学, 2019, 40(3): 852-860.
[2]	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.
[3]	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.
[4]	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.
[5]	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.
[6]	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.
[7]	王军, 胡惠丽, 刘飞禹, 蔡袁强, . 粒孔比对筋土界面直剪特性的影响[J]. 岩土力学, 2018, 39(S2): 115-122.
[8]	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.
[9]	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.
[10]	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.
[11]	崔国建，张传庆，刘立鹏，周辉，程广坦,. 锚杆杆体–砂浆界面力学特性的剪切速率效应研究[J]. , 2018, 39(S1): 275-281.
[12]	杨琪，张友谊，刘华强，秦华，. 一种气泡轻质土路基受载-破坏模型试验[J]. , 2018, 39(9): 3121-3129.
[13]	马凯，尹立明，陈军涛，陈明，王自起，崔博强,. 深部开采底板隔水关键层受局部高承压水作用破坏理论分析[J]. , 2018, 39(9): 3213-3222.
[14]	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.
[15]	郭昭胜，贺武斌，白晓红. 桩-承台-土复合受力体的拟静力模型试验[J]. , 2018, 39(9): 3321-3330.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed