| 澧水特大桥危岩稳定性分析及施工监测研究 |
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| 引用本文： | 邓鲲,谢上飞,贺炜.澧水特大桥危岩稳定性分析及施工监测研究[J].中南公路工程,2013(5):9-12. |
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| 作者姓名： | 邓鲲 谢上飞 贺炜 |
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| 作者单位： | [1]湖南省张花高速公路建设开发有限公司,湖南张家界427000 [2]湖南省交通科学研究院,湖南长沙410015 [3]长沙理工大学土木与建筑学院,湖南长沙410114 |
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| 基金项目： | 湖南交通科技项目（200904） |
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| 摘 要： | 张家界至花垣高速公路是位于湖南省西部山区.在这些地区修建高速公路时,往往会遇到一些特殊问题,如澧水特大桥花垣岸危岩体的稳定性问题.勘查发现,在大桥附近共有5处危岩体,其中以W7危岩体稳定性最差.首先,对W7危岩体进行稳定性分析后发现其处于极限平衡状态,大桥施工期间,特别是在锚碇和索塔基坑开完期间,爆破作业可能会导致危岩体失稳.然后,对W7危岩体进行实施监测,监测结果表明：爆破施工对危岩体裂缝宽度的影响非常微小,不会对其稳定性产生过大影响.
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| 关 键 词： | 高速公路 岩石力学 危岩 稳定性 位移 |
Stability Analysis and Monitoring of Unstable Rock Close to Lishui Grand Bridge |
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| DENG Kun;XIE Shangfei;HE Wei.Stability Analysis and Monitoring of Unstable Rock Close to Lishui Grand Bridge[J].Central South Highway Engineering,2013(5):9-12. |
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| Authors: | DENG Kun;XIE Shangfei;HE Wei |
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| Institution: | DENG Kun;XIE Shangfei;HE Wei(Hunan Zhanghua Expressway Construction and Development Co.Ltd., Zhangjiajie, Hunan 427000,China;Hunan Communications Research Institute, Changsha, Hunan 410015, China;School of Civil ＆ Architecture, Changsha University of Science ＆ Technology, Changsha, Hunan 410114, China) |
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| Abstract: | Zhangjiajie to Huayuan＇ s highway is located in the western mountain area in Hunan province.Some special problem often encountered during construction process,for example,the stability of unstable rock besides the Lishui grand bridge.There are 5 unstable rock near the bridge incording to geological prospecting result and the most unstable one is W7.This paper analyzed the stability of W7.It founds that W7 was in the limit equilibrium state.It may lead to W7 lost stability while the foundation pit is constructing.Then a series of monitoring was carried out.The result shows that the influence of blasting construction for unstable rock crack width is very small and it cause not too much influence on its stability. |
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| Keywords: | highway rock mechanics unstable rock stability displacement |
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