| 考虑渗流及软化的海底隧道围岩弹塑性分析 |
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| 引用本文： | 王星华,章敏,王随新.考虑渗流及软化的海底隧道围岩弹塑性分析[J].岩土力学,2009,30(11):3267-3272. |
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| 作者姓名： | 王星华 章敏 王随新 |
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| 作者单位： | 1. 中南大学,土木建筑学院,长沙,410075
2. 中铁七局集团有限公司,郑州,450016 |
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| 基金项目： | 国家863基金资助项目 |
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| 摘 要： | 在海水渗流的情况下，考虑隧道围岩屈服后强度衰减（塑性软化）的特点，用弹性-塑性软化-塑性残余三线性应力-应变模型推导出了海底隧道围岩塑性软化区半径、塑性残余区半径、洞周边位移、围岩内任一点应力及围岩压力的解析表达式，并与仅考虑渗流及渗流和软化皆不考虑的其他两种情况进行了对比，研究表明：在渗流和材料软化中，后者对隧道围岩稳定最为不利。分析了不同软化程度对结果的影响，该结果为海底隧道围岩稳定性分析等方面提供了理论依据。
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| 关 键 词： | 海底隧道 围岩 渗流 应变软化 |
| 收稿时间： | 2008-04-25 |
Elastoplastic analysis of surrounding rocks of subsea tunnel with consideration of seepage and material softening |
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| WANG Xing-hua,ZHANG Min,WANG Sui-xin.Elastoplastic analysis of surrounding rocks of subsea tunnel with consideration of seepage and material softening[J].Rock and Soil Mechanics,2009,30(11):3267-3272. |
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| Authors: | WANG Xing-hua ZHANG Min WANG Sui-xin |
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| Institution: | 1. School of Civil and Architectural Engineering，Central South University, Changsha 410075, China; 2. China Railway 7th Group Co., Ltd., Zhengzhou, 450016, China |
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| Abstract: | Under the condition of seawater seepage and by considering the behaviors of strength reduction for surrounding rock after yielding, that is plastic-softening, the analytical equations for calculating the radius of plastic-softening and plasto-residual zones as well as the displacements around openings are proposed according to the elastic-softening- residual plastic triple linear stress strain model. By comparing with other two situations, one is considered seepage only, the other one is considered non-seepage and non-softening, it demonstrates softening is more disadvantaged to the stability of surrounding rocks. The influences of different softening extents on the results are also analyzed. The results provide a theory base for stability analysis of surrounding rocks and engineering practice in subsea tunnels. |
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| Keywords: | subsea tunnel surrounding rocks seepage strain-softening |
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