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| 低地应力区地下洞室开挖后围岩应力数值模拟 | |
| 引用本文： | 胡夏嵩,白国伟,赵法锁.低地应力区地下洞室开挖后围岩应力数值模拟[J].长安大学学报(自然科学版),2005,25(6):57-61. |
| 作者姓名： | 胡夏嵩 白国伟 赵法锁 |
| 作者单位： | 1. 清华大学,工程力学系,北京,100084;青海大学,水电系,青海,西宁,810016 2. 陕西,长武亭南煤业有限责任公司,陕西,咸阳,713600 3. 长安大学,地质工程与测绘工程学院,陕西,西安,710054 |
| 基金项目： | 中国博士后科学基金资助项目（2003 034 123） |
| 摘 要： | 以西北地区某水利工程地下洞室工程为例,采用弹塑性二维有限元法对低地应力区地下洞室围岩开挖后围岩应力进行了数值模拟研究,模拟出了低地应力区地下洞室围岩开挖后围岩应力值及其分布规律.结果表明,低地应力区地下洞室开挖后洞室围岩形成应力集中现象,侧壁位置处产生的压应力值大于洞顶位置压应力值,且洞顶产生拉应力.该研究成果将有助于进一步研究低地应力区地下洞室围岩变形破坏机理及其稳定性,对保障地下洞室工程的圆满进行具有重要的理论价值和现实意义. |
| 关 键 词： | 岩土工程 低地应力区 地下洞室 围岩应力 弹塑性二维有限元法 数值模拟 |
| 文章编号： | 1671-8879（2005）03-0057-05 |
| 收稿时间： | 2004-03-20 |
| 修稿时间： | 2004年3月20日 |
Numerical stress simulation on surrounding rockmass of underground excavation in low ground stress regions |
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| HU Xia-song,BAI Guo-wei,ZHAO Fa-suo.Numerical stress simulation on surrounding rockmass of underground excavation in low ground stress regions[J].JOurnal of Chang’an University:Natural Science Edition,2005,25(6):57-61. | |
| Authors: | HU Xia-song BAI Guo-wei ZHAO Fa-suo |
| Abstract: | By taking one hydraulic underground excavation engineering project in the Northwest of China as an example,the surrounding rockmass stress field of underground excavation in the low ground stress regions is simulated with two-dimension elastico-plastic Finite Element Method(FEM).The simulating results indicate: the stress concentration is formed in surrounding rockmass;the compress stress at the roof of underground excavation is especially smaller than those at both sides,and the tension stress is formed at the roof.Those results have great significance for studying the deformation and failure mechanism of surrounding rockmass,meanwhile,they will also play a very important role in ensuring the progress in underground excavation engineering projects.1 tab,7 figs,11 refs. |
| Keywords: | geotechnical engineering low ground stress region underground excavation surrounding rockmass stress field 2D elasto-plastic Finite Element Method numerical simulation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |