| 破碎围岩偏压隧道合理施工方法研究 |
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| 引用本文： | 李明,陈洪凯.破碎围岩偏压隧道合理施工方法研究[J].武汉理工大学学报(交通科学与工程版),2010,34(2):237-241. |
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| 作者姓名： | 李明 陈洪凯 |
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| 作者单位： | 1. 西南交通大学土木工程学院,成都,610031;重庆交通大学岩土工程研究所,重庆,400047
2. 重庆交通大学岩土工程研究所,重庆,400047 |
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| 基金项目： | 国家自然科学基金项目(批准号:50678182);;重庆交通大学青年基金项目资助 |
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| 摘 要： | 破碎围岩段偏压隧道施工时,较多采用双侧壁导坑法,预留核心土对在开挖过程中隧道的围岩变形和支护受力有很大影响,对隧道围岩稳定性起着至关重要的作用.针对重庆境内的某浅埋偏压隧道在施工中的合理工法和安全性保证问题,系统比较分析了上下台阶法施工和预留核心土施工对隧道围岩的应力场、位移场、塑性区和支护结构内力影响.通过计算结果表明,预留核心土施工具有明显的优点,其不但减小了隧道围岩的净空位移,控制了塑性区的发展,而且改善了支护结构的受力,使其更加趋于均匀合理.研究成果与现场施工实际相吻合,为偏压破碎围岩隧道开挖实践提供了理论分析依据.
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| 关 键 词： | 破碎围岩 偏压隧道 施工工法 上下台阶法 预留核心土 |
Research on Reasonable Construction Technique of Unsymmetrical Loading Tunnel in Crushed Rock Mass |
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| Li Ming,Chen Hongkai.Research on Reasonable Construction Technique of Unsymmetrical Loading Tunnel in Crushed Rock Mass[J].journal of wuhan university of technology(transportation science&engineering),2010,34(2):237-241. |
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| Authors: | Li Ming Chen Hongkai |
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| Institution: | School of Civi1 Engineering/a>;Southwest Jiaotong University/a>;Chengdu 610031/a>;China;Institute of Geotechnical Engineering/a>;Chongqing Jiaotong University/a>;Chongqing 400074/a>;China |
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| Abstract: | The method of double-sides-wall drift is usually adopted when unsymmetrical loading tunnel is excavated in weak surrounding rock,and the core rock is a quite important factor to the displacement,stability of the surrounding rock mass and the internal force of supporting during excavation.Basing on the problem of reasonable technique and ensure security in LiChuan unsymmetrical loading tunnel construction,the author analyzed the impact of rock mass stress field,displacement field,plastic zone and supporting ... |
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| Keywords: | crushed rock mass unsymmetrical loading tunnel construction technique benching tunneling method keeping core soil |
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