| 大宁水库防渗墙受墙侧回填施工影响的数值模拟 |
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| 引用本文： | 刘光明,袁鸿鹄,黄卫红,刘淼,王芝银.大宁水库防渗墙受墙侧回填施工影响的数值模拟[J].岩土力学,2013,34(6):1786-1790. |
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| 作者姓名： | 刘光明 袁鸿鹄 黄卫红 刘淼 王芝银 |
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| 作者单位： | 1.北京市南水北调工程建设委员会办公室，北京 100036；2.北京市水利规划设计研究院，北京 100048； 3.中国石油大学 城市油气输配技术北京市重点实验室，北京 102249 |
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| 摘 要： | 大宁水库防渗墙部分区段地势落差大，墙体两侧及下墙顶部有较大回填土方量，受工程扰动较大。在既有试验和实测参数的基础上，依据现场实际回填施工过程，对大宁水库防渗墙受墙体两侧回填土施工作用进行了三维数值仿真模拟。模拟过程中考虑了回填土和防渗墙之间的相互作用，分析了距墙体不同位置、不同接触形式的回填土对墙体变形和应力的影响，获得了随施工进程墙体内部位移和应力的分布规律。研究表明，填土过程中上部墙体向水库内侧倾斜，其最大主应力出现在两墙交接位置的上方；下部墙体倾斜量很小，最大主应力出现在导墙下方，不存在拉应力；墙体的位移、应力沿走向方向存在一定的差异，在墙体拐角处变化最大。对比分析表明，数值模拟结果与现场实测值较为接近。
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| 关 键 词： | 回填土 防渗墙 模拟 |
| 收稿时间： | 2012-03-30 |
Numerical simulation for cutoff wall under backfilling construction of Daning reservoir |
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| LIU Guang-ming、,YUAN Hong-hu、,HUANG Wei-hong、,LIU Miao、,WANG Zhi-yin、.Numerical simulation for cutoff wall under backfilling construction of Daning reservoir[J].Rock and Soil Mechanics,2013,34(6):1786-1790. |
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| Authors: | LIU Guang-ming、 YUAN Hong-hu、 HUANG Wei-hong、 LIU Miao、 WANG Zhi-yin、 |
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| Institution: | 1. The Office of the SNWDP Construction Commission in Beijing City, Beijing 100036, China; 2. Beijing Municipal Institute of Hydraulic Engineering Planning design and Research, Beijing 100048, China; 3. Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum, Beijing 102249, China |
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| Abstract: | There is a large terrain gap to some sections of cut-off wall for Daning reservoir, on both sides of wall and the top of lower wall, which affected by construction significantly, need a large amount of backfill soil. A three-dimensional numerical simulation is adopted based on experiment and monitoring data to analysis the effect of backfilling construction. The interaction between cutoff wall and backfilled soil is considered in the simulation. The stresses and deformations of the wall forms affected by different distances and contact are analyzed; the distribution of internal deformation and stress along the construction proceeding is obtained at the same time. The analysis shows that the upper wall tilts toward inside of reservoir, and the maximum principal stress appears at top of transfer position of the two walls. The inclination of the lower wall is very small and its maximum principal stress appears at the bottom of guide wall. No tensile stress exists in the lower wall. The stress and deformation of the wall have some variances along the wall, and the greatest change presents at the corner. The simulation results are comparatively close with the monitoring results. |
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| Keywords: | backfilled soil cutoff wall simulation |
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