| 泥岩隧道施工过程中渗流场与应力场全耦合损伤模型研究 |
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| 引用本文： | 贾善坡,陈卫忠,于洪丹,李香玲.泥岩隧道施工过程中渗流场与应力场全耦合损伤模型研究[J].岩土力学,2009,30(1):19-26. |
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| 作者姓名： | 贾善坡 陈卫忠 于洪丹 李香玲 |
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| 作者单位： | 1.中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，武汉 430071；2.Euridice, SCK•CEN, 国家核能研究中心，比利时 摩尔 2400 |
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| 基金项目： | 国家自然科学基金，国家自然科学基金，国家高技术研究发展计划(863计划) |
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| 摘 要： | 在连续损伤力学理论基础上，将塑性损伤演化及渗流相互耦合的概念引入Mohr-Coulomb 破坏准则，用于分析在孔隙压力和塑性损伤演化共同作用下岩石损伤演化机制，建立了相应的有限元损伤数值分析模型，并应用于比利时核废料库开挖过程中泥岩隧道附近围岩发生损伤演化、渗流场和应力场耦合过程分析中，得到了开挖引起的围岩损伤特性、孔隙压力以及渗透性的变化规律，为进一步研究隧道流变过程水力耦合特性合理的数值计算模型建立方法提供基础。
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| 关 键 词： | 泥岩 耦合 损伤演化 渗透性 有限元 |
| 收稿时间： | 2008-04-02 |
Research on seepage-stress coupling damage model of Boom clay during tunneling |
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| JIA Shan-po,CHEN Wei-zhong,YU Hong-dan,LI Xiang-ling.Research on seepage-stress coupling damage model of Boom clay during tunneling[J].Rock and Soil Mechanics,2009,30(1):19-26. |
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| Authors: | JIA Shan-po CHEN Wei-zhong YU Hong-dan LI Xiang-ling |
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| Institution: | 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China;2. Euridice, SCK•CEN, Belgian Nuclear Research Centre, Mol 2400, Belgium |
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| Abstract: | Based on the theory of continuum damage mechanics, a modified Mohr-Coulomb failure criterion according to plastic damage evolution and the seepage-stress coupling is applied to analyze the excavation damage of Boom clay influenced by the evolution of pore pressure and plastic strain. Considering the actual case of the construction of the connecting gallery of radioactive waste disposal in the deep Boom clay formation in Belgium, a nonlinear finite element damage model for simulating shield tunneling is proposed in order to study the evolution of damage, pore pressure and permeability of the surrounding rock. The variations of damage and permeability around the tunnel with time are analyzed in detail. The presented method can provide the references for the influence of tunnel drainage on geological environment and creep process analysis of surrounding rock. |
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| Keywords: | Boom clay seepage-stress coupling damage evolution permeability finite element method |
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