| 隧道围岩挤压变形问题探究 |
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| 引用本文： | 王成虎,沙鹏,胡元芳,李苍松,郭啟良.隧道围岩挤压变形问题探究[J].岩土力学,2011,32(Z2):143-147. |
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| 作者姓名： | 王成虎 沙鹏 胡元芳 李苍松 郭啟良 |
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| 作者单位： | 中国地震局地壳应力研究所;中铁西南科学研究院有限公司; |
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| 基金项目： | 铁道部重大课题“隧道围岩稳定性及其控制技术研究”资助(No.2009G005-D); 中央级科研院所基本科研业务专项资助(No.ZDJ2010-13) |
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| 摘 要： | 隧道围岩大变形是目前公路、铁路隧道建设中遇到的重要科学问题。工程实践中,隧道围岩大变形主要是由于围岩遭受剪切破坏而产生了流变而导致的,部分隧道的围岩大变形是由于围岩成分中的亲水矿物遇水发生水化学反应而发生体积膨胀产生的,故隧道围岩大变形可以分为应力型、材料性和结构型3类。通过全面分析前人的研究成果,可以将隧道围岩相对变形3%作为划分隧道内是否发生大变形的定量评价指标。而对于应力型围岩大变形,Hoek提出的隧道围岩径向变形和掌子面变形预测公式较好地预测了施工现场的围岩变形量,其现实意义较为明显,但需要针对不同的工程条件调整原地应力的估算公式或者考虑围岩二次应力场的赋存状态。对于材料型和结构型围岩大变形的变形量预测,目前仍然是一块研究的空白区,需要进一步开展相关工作。
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| 关 键 词： | 围岩 大变形 挤压变形 强度应力比 膨胀性围岩 |
| 收稿时间： | 2011-04-01 |
Study of squeezing deformation problems during tunneling |
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| WANG Cheng-hu,SHA Peng,HU Yuan-fang,LI Cang-song,GUO Qi-liang.Study of squeezing deformation problems during tunneling[J].Rock and Soil Mechanics,2011,32(Z2):143-147. |
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| Authors: | WANG Cheng-hu SHA Peng HU Yuan-fang LI Cang-song GUO Qi-liang |
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| Institution: | 1. Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China; 2. Southwest Research Institute of China Railway Group Limited, Chengdu 610031, China) |
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| Abstract: | The squeezing problem is one of the most tuff problems that appear during the construction of highway and railway tunnels.In the engineering practice,the squeezing problem is mainly caused by the creep of rock mass due to the shearing failure.Some squeezing problem is created by the swelling due to the reaction between the clay minerals of rock and the water present in the rock mass.Therefore,the squeezing problem can be classified into three categories: stress induced,swelling induced and structure induced... |
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| Keywords: | surrounding rock mass large deformation squeezing deformation strength-stress ratio swelling rock mass |
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