| 盾构隧道开挖三维数值模拟方法研究 |
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| 引用本文： | 徐明,谢永宁. 盾构隧道开挖三维数值模拟方法研究[J]. 武汉理工大学学报, 2012, 34(2): 65-68 |
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| 作者姓名： | 徐明 谢永宁 |
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| 作者单位： | 清华大学土木工程系,土木工程安全与耐久教育部重点实验室,北京100084 |
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| 基金项目： | 国家自然科学基金(50808109);国家“973”计划(2010CB732103) |
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| 摘 要： | 盾构隧道开挖的模拟方法是对隧道-土-结构物相互作用进行三维数值分析的重要考虑因素。对两种典型的模拟方法进行了探讨,一种是更接近真实施工过程的分步开挖法,另一种则是简化的一步通长开挖应力释放法。对比分析表明,两种方法对于地面沉降的预测结果比较接近,而对于邻近桩基础的预测结果之间的差异也不是太大。同时,一步通长开挖应力释放法能得到不同的地层损失,并且建模简单,能够较好地用于分析隧道开挖对地面建筑物及周边地下结构物的影响。
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| 关 键 词： | 盾构隧道 三维数值模拟 地面沉降 地层损失 桩基础 |
Study on the Numerical Modeling Methods of Tunneling |
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| XU Ming , XIE Yong-ning. Study on the Numerical Modeling Methods of Tunneling[J]. Journal of Wuhan University of Technology, 2012, 34(2): 65-68 |
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| Authors: | XU Ming XIE Yong-ning |
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| Affiliation: | (Key Laboratory of Civil Engineering Safety and Durability of Ministry of Education, Department of Civil Engineering,Tsinghua University,Beijing 100084,China) |
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| Abstract: | The method to simulate TBM tunneling is an important factor in the three dimensional numerical analysis of tunnel-soil-structure interaction.This paper aims to compare two types simulation methods,one is more realistic step-by-step excavation simulation,while another is highly simplified stress-relaxation method.It is revealed that those two methods predict very similar ground settlement,and the difference in predicting pile foundation behavior is not significant.Compared with step-by-step excavation method,the stress relaxation method can obtain different ground loss while it is much simpler.Therefore,the stress relaxation method can be used to analysis the influence of tunneling on the ground buildings and underground structures. |
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| Keywords: | tunneling three dimensional numerical analysis surface settlement volume loss pile |
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