| 桥墩底部岩溶对其上层围岩稳定性影响的数值研究 |
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| 引用本文： | 谭志宏,唐春安,杨天鸿,芮勇勤.桥墩底部岩溶对其上层围岩稳定性影响的数值研究[J].地球与环境,2005,33(Z1):309-313. |
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| 作者姓名： | 谭志宏 唐春安 杨天鸿 芮勇勤 |
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| 作者单位： | 1. 东北大学岩石破裂与失稳研究中心,辽宁,沈阳,110004
2. 长沙理工大学,湖南,长沙 |
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| 基金项目： | 中国科学院资助项目;西部交通科技攻关项目 |
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| 摘 要： | 本文运用RFPA系统的强度折减版以清水大桥5号断面为背景对桥墩底部溶洞区对其上部围岩稳定性的影响进行了数值分析研究。研究结果表明:岩:容对其上层围岩的影响范围随着深度的增大而变大;破坏效应带主要是在垂直于自由面的溶洞两侧;对多溶洞而言,应力主要集中在两溶洞破坏效应带之间的区域,并且主要在此发生破坏,而在其内部效应带之间则比较稳定。
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| 关 键 词： | 岩溶 稳定性 地表沉降 数值分析 |
| 文章编号： | 1672-9250(2005)增-0309-05 |
| 修稿时间： | 2005年4月19日 |
NUMERICAL ANALYSIS OF INFLUENCE OF KARST CAVES UNDER THE PIER ON STABILITY OF ITS SURROUNDING ROCK MASS |
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| TAN Zhi-hong,TANG Chun-an,YANG Tian-hong,RUI Yong-qin.NUMERICAL ANALYSIS OF INFLUENCE OF KARST CAVES UNDER THE PIER ON STABILITY OF ITS SURROUNDING ROCK MASS[J].Earth and Environment,2005,33(Z1):309-313. |
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| Authors: | TAN Zhi-hong TANG Chun-an YANG Tian-hong RUI Yong-qin |
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| Abstract: | Karst caves is a important problem for the construction. This paper makes the research on numerical analysis of influence of Karst caves under the pier on stability of its surrounding rock mass by using the RFPA software and yet analyses the instance of No. 5 plane of Qingshui Bridge. The following results has been given. The influenced area the caves made is relative to its depth, the deeper the depth is, the larger the area is. The destroying domino effect area is mainly concentrated on the area beside the plane which is vertical to the free plane. If there are some caves, the stress is concentrated on the destroying domino effect area between two caves, and destroy occurs mainly there. |
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| Keywords: | Karst caves Stability Surface Subsidence Numerical analysis |
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