| 岩质圆形隧洞围岩应力场弹塑性新解 |
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| 引用本文： | 王亮,赵均海,李小伟.岩质圆形隧洞围岩应力场弹塑性新解[J].工程地质学报(英文版),2007,15(3):422-427. |
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| 作者姓名： | 王亮 赵均海 李小伟 |
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| 作者单位： | 长安大学建筑工程学院,西安710061 |
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| 基金项目： | 高等学校博士学科点专项科研项目 |
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| 摘 要： | 鉴于目前隧洞围岩应力场弹塑性分析多采用Mohr-Coulomb准则分析而未能考虑岩石中间主应力的不足,选取米勒试验中第Ⅱ类岩石材料,以具有完整性围岩结构特征的岩质圆形隧洞为研究对象,应用统一强度理论推导出了岩质圆形隧洞围岩应力和塑性区半径等弹塑性理论新解,已有的修正芬纳公式和卡斯特纳公式是本文解在b=0情况下的退化形式。通过分析获得了一些新的认识和结论,对工程实践具有较好的指导意义。
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| 关 键 词： | 统一强度理论 隧洞围岩 弹塑性解 |
| 文章编号： | 1004-9665/2007/15(03)-0422-06 |
| 收稿时间： | 2007-03-06 |
| 修稿时间： | 2007-03-062007-04-09 |
NEW ELASTOPLASTIC SOLUTION OF ROCK CIRCULAR TUNNEL SURROUNDING ROCKMASS STRESS FIELD |
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| WANG Liang,ZHAO Junhai,LI Xiaowei.NEW ELASTOPLASTIC SOLUTION OF ROCK CIRCULAR TUNNEL SURROUNDING ROCKMASS STRESS FIELD[J].Journal of Engineering Geology,2007,15(3):422-427. |
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| Authors: | WANG Liang ZHAO Junhai LI Xiaowei |
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| Institution: | School of Civil Engineering,Chang′an University,Xi′an 710061 |
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| Abstract: | Presently,in tunnel surrounding rockmass stress field, elastoplasticanalysis often uses the Mohr-Coulomb criterion,which doesnt consider the principal stress.The paper selects the II kind of rock materialin Miller,R.Ps experiment.Taking the circular tunnel as the research object which has integrity formationin rockmass.Then inferred circular tunnel newelastoplastic solution,such as the stress of surrounding rockmass,plastic area radius by using the unification theory of strength. and ,the introduction parameter,get their expression in two strength indexessystem ,fc and c,.Then,author has analyzed the relationship among strength indexs by curves.The solutions based onmodifiedFenner formulaand Kastner formulais the reduced forms of new elastoplastic solusions in b=0 situation.Finally,some new conclusions has obtained,which doesthe good guiding sense to the project practice. |
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| Keywords: | Unified sthength theory Tunnel surrounding rockmass Elastoplastic solution |
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