| 高应力岩石局部化变形与隧道围岩灾变破坏过程 |
| |
| 引用本文： | 赵瑜,张春文,刘新荣,陈陆望.高应力岩石局部化变形与隧道围岩灾变破坏过程[J].重庆大学学报(自然科学版),2011,34(4):100-106. |
| |
| 作者姓名： | 赵瑜 张春文 刘新荣 陈陆望 |
| |
| 作者单位： | 赵瑜,张春文,刘新荣,ZHAO Yu,ZHANG Chun-wen,LIU Xing-rong(重庆大学土木工程学院,重庆,400045;重庆大学山地城镇建设与新技术教育部重点实验室,重庆,400045);陈陆望,CHEN Lu-wang(合肥工业大学资源与环境工程学院,安徽,合肥,230009) |
| |
| 基金项目： | 国家自然科学基金资助项目，教育部新世纪人才支持计划资助项目 |
| |
| 摘 要： | 为了研究深埋隧道围岩变形局部化与渐进破坏现象,运用FLAC3D三维显式有限差分法分析软件,基于摩尔-库仑剪破坏与拉破坏复合的应变软化模型,采用大变形的计算方法,研究了岩石试件在单轴压缩状态下局部化现象启动、发展直至试件最终破坏的全过程,进一步结合隧道物理模型试验,探讨了高应力条件下隧道围岩变形局部化与渐进破坏的关系,发现岩石材料表现出的软化性状与剪切带形成的结构软化有着密切的联系,从围岩屈服区和软化带的分布规律找到高地应力隧道围岩渐进破坏的突破口,并指出岩体单元的弹性变形和单元屈服后岩体的塑性挤出是隧道开挖后收敛变形的主要原因.
|
| 关 键 词： | 应变局部化 破坏过程 高地应力 |
| 收稿时间： | 2010/11/17 0:00:00 |
Study on strain localization and progressive failureof surrounding rock under high pressure environment |
| |
| ZHAO Yu,ZHANG Chun-wen,LIU Xing-rong and CHEN Lu-wang.Study on strain localization and progressive failureof surrounding rock under high pressure environment[J].Journal of Chongqing University(Natural Science Edition),2011,34(4):100-106. |
| |
| Authors: | ZHAO Yu ZHANG Chun-wen LIU Xing-rong and CHEN Lu-wang |
| |
| Institution: | ZHAO Yu1a,b,ZHANG Chun-wen1a,LIU Xing-rong1a,CHEN Lu-wang2(1.a.College of Civil Enginering,b.Key Laboratory of New Technology for Construction of Cities in Mountaion Area,Ministry of Education,Chongqing University,Chongqing 400045 P.R.China,2.School of Resources and Environmental Engineering,Hefei University of Technology,Hefei 230009 Anhui,P.R.China) |
| |
| Abstract: | This paper uses the Mohr-Coulomb criterion with tension cut-off strain-softening model and the large-strain calculation method to study the localized deformation and progressive failure.It investigates the process of stain localization appearing,growing and sample failure,and uses the physical and numerical simulation to explore the relationship between strain localization and progressive failure of surrounding rock.The results show that the soften character of rock sample is caused by stain localization.Th... |
| |
| Keywords: | strain localization progressive failure high geostress |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《重庆大学学报(自然科学版)》浏览原始摘要信息 |
| 点击此处可从《重庆大学学报(自然科学版)》下载免费的PDF全文 |
|
