| 考虑峰后效应的围岩特征曲线 |
| |
| 引用本文： | 仇文革,章慧健. 考虑峰后效应的围岩特征曲线[J]. 中国铁道科学, 2011, 32(3) |
| |
| 作者姓名： | 仇文革 章慧健 |
| |
| 作者单位： | 西南交通大学,土木工程学院,四川,成都,610031 |
| |
| 基金项目： | 铁道部科技研究开发计划项目，国家自然科学基金资助项目 |
| |
| 摘 要： | 运用UDEC离散元程序对直剪试验进行数值模拟,结果表明该方法可以有效模拟岩石峰后剪胀效应.运用理论分析和数值模拟试验的方法,对某一在建四线铁路车站隧道的全过程围岩特征曲线进行研究.研究结果表明:提出的"统一围岩特征曲线"考虑了弹塑性介质向松弛介质的过渡,运用了弹甥性支护理论、松动圈支护理论和普氏理论,反映了形变压力到松弛压力的转变,体现了不同阶段存在着不同性质的支护荷载;在岩石峰后区应使用可伸缩性支护或多次支护;盲目加大支护刚度反而会使支护承担较大的碎胀力.
|
| 关 键 词： | 围岩稳定 特征曲线 剪胀 峰后特性 隧道支护 |
The Characteristic Curve of Surrounding Rock Regarding Post-Failure Behavior |
| |
| QIU Wenge,ZHANG Huijian. The Characteristic Curve of Surrounding Rock Regarding Post-Failure Behavior[J]. China Railway Science, 2011, 32(3) |
| |
| Authors: | QIU Wenge ZHANG Huijian |
| |
| Affiliation: | QIU Wenge,ZHANG Huijian(School of Civil Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China) |
| |
| Abstract: | UDEC discrete element software was used to carry out the numerical simulation of direct shear test.Result indicates that this method can effectively simulate the shear dilation at post-failure stage of rock.The characteristic curve of surrounding rock in the overall process of one four-line railway station tunnel under construction has been studied by theoretical analysis and numerical simulation test.Results show that the proposed unified surrounding rock characteristic curve has taken into account the tra... |
| |
| Keywords: | Surrounding rock stability Characteristic curve Shear dilation Post-failure behavior Tunnel support |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
