| 含初始缺陷地铁隧道的抗震动力学行为研究 |
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| 引用本文： | 孙玮泽,董军,崔玉萍,董飞.含初始缺陷地铁隧道的抗震动力学行为研究[J].岩土力学,2012,33(Z2):283-288. |
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| 作者姓名： | 孙玮泽 董军 崔玉萍 董飞 |
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| 作者单位： | 1. 北京建筑工程学院 土木与交通学院，北京 100044；2. 中交路桥技术有限公司，北京 100029； 3. 北京建筑工程学院 工程结构与新材料北京市高等学校工程研究中心，北京 100044 |
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| 基金项目： | 工程结构与新材料北京市高等学校工程研究中心开放基金资助项目(No.KM201110016012) |
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| 摘 要： | 针对含初始缺陷的既有地铁隧道受邻近穿越隧道施工影响的首都地铁隧道工程背景，基于有限差分方法，通过对既有地铁车站结构受邻近隧道穿越后的抗震性能研究，揭示其抗震动力响应机理。结果表明，在邻近隧道穿越影响下，含初始缺陷的既有隧道各薄弱控制点在地震作用下位移和应力动力时程的波动趋势具有相似性，说明衬砌结构是整体运动的，其位移、应力较穿越前均有所增加，边墙和仰拱在穿越后抗震性能影响最大，剪切破坏主要以车站结构周边土体为主，新线穿越后其剪切破坏分布范围有所增大，应进行注浆加固处理，与自身结构刚度相匹配，提高抗震能力。
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| 关 键 词： | 有限差分法 既有隧道 初始缺陷 地震动力响应 |
| 收稿时间： | 2012-07-14 |
Study of aseismatic performance of a typical subway tunnel with initial defects |
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| SUN Wei-ze,DONG Jun,CUI Yu-ping,DONG Fei.Study of aseismatic performance of a typical subway tunnel with initial defects[J].Rock and Soil Mechanics,2012,33(Z2):283-288. |
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| Authors: | SUN Wei-ze DONG Jun CUI Yu-ping DONG Fei |
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| Institution: | 1. School of Civil Engineering and Traffic Engineering, Beijing Institute of Civil Engineering and Architecture, Beijing 100044, China; 2. Road and Bridge Consultants Co., Ltd., China Communications Construction Company, Beijing 100029, China; 3. Beijing Higher Institution Engineering Research Center of Structural Engineering and New Materials, Beijing Institute of Civil Engineering and Architecture, Beijing 100044, China |
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| Abstract: | For the engineering background of a typical subway tunnel with initial defects caused by the construction of the new down-through tunnels in Beijing, the aseismatic performance of the existed tunnel is studied so as to reveal the mechanism of seismic dynamic response by using finite difference method. Numerical model will firstly be established. Then its boundary conditions and initial conditions are considered, including the choice of related parameters and seismic wave at the same time. The numerical simulation results show that the tunnel is deforming in its entirety since such physical variables as displacement and stress in its all key weak points have the same dynamic tendency under the influence of approaching construction of tunnels, and the variables including displacement and stress are much larger than those without any influence. For examples, after down-through construction, much influences of aseismatic performance are mainly taking place at both the side wall and the upper arch; and the shearing damage are mainly doing in surrounding soil mass. Due to widely shearing damage after down-through construction, it is suggested that grouting reinforcing should be applied so as to make them much stiffness as a whole and to have good aseismatic performance. |
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| Keywords: | finite difference method existed tunnel initial defects seismic dynamic response |
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