| 黏土中盾构开挖面变形与破坏数值模拟研究 |
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| 引用本文： | 秦建设,虞兴福,钟小春,朱 伟.黏土中盾构开挖面变形与破坏数值模拟研究[J].岩土力学,2007,28(Z1):511-515. |
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| 作者姓名： | 秦建设 虞兴福 钟小春 朱 伟 |
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| 作者单位： | 1. 杭州市地铁集团有限责任公司，杭州 31003；2. 浙江省建筑科学设计研究院有限公司，杭州 310012； 3. 河海大学 土木工程学院，南京 210098； 4.河海大学 环境科学与工程学院，南京 210098 |
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| 基金项目： | 浙江省科技厅重点项目（No. 2006F12026） |
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| 摘 要： | 开挖面支护应力的控制是土压平衡式盾构施工成功的关键。利用能够考虑大变形破坏的拉格朗日有限差分计算程序，对土压平衡式盾构在黏土地层施工中，因开挖面支护压力控制不当引起的开挖面的变形及破坏问题进行计算分析，探讨了开挖面变形及破坏模式，分析了开挖引起的周围土体应力释放问题，为黏土地层中盾构开挖面控制压力的确定提供参考。
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| 关 键 词： | 土压盾构 黏土地层 开挖面稳定 支护应力 应力释放 |
| 收稿时间： | 2007-05-30 |
Numerical research on face movement and collapse of shield tunneling in silt ground |
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| QIN Jian-she,YU Xing-fu,ZHONG Xiao-chun,ZHU Wei.Numerical research on face movement and collapse of shield tunneling in silt ground[J].Rock and Soil Mechanics,2007,28(Z1):511-515. |
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| Authors: | QIN Jian-she YU Xing-fu ZHONG Xiao-chun ZHU Wei |
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| Institution: | 1. Hangzhou Metro Co. Ltd. Hangzhou 310003, China; 2. Zhejiang Academy of Building Research & Design Co. Ltd., Hangzhou 310012, China; 3. College of Civil Engineering, Hohai University, Nanjing 210098, China; 4. College of Environmental Science and Technology, Hohai University, Nanjing 210098, China |
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| Abstract: | The face support pressure control is a key operation during earth pressure balanced shield excavation. Three-dimensional fast Lagrangian differential finite element method can calculate the large strain of material, which is used to simulate the influence of face support pressure to face movement and collapse. Deformation and collapse pattern is discussed, and the soil stress release is analyzed due to shield excavation. Some useful results from numerical simulation are given for controlling face support pressure. |
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| Keywords: | earth pressure balanced shield silt soil face stability support pressure stress release |
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