| 金坪引水隧洞围岩变形稳定性评价 |
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| 引用本文： | 张勇,聂德新.金坪引水隧洞围岩变形稳定性评价[J].工程地质学报(英文版),2005,13(4):461-464. |
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| 作者姓名： | 张勇 聂德新 |
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| 作者单位： | 成都理工大学工程地质研究所,成都,610059;成都理工大学工程地质研究所,成都,610059 |
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| 摘 要： | 金坪引水隧洞埋深较大,部分洞段岩体强度较低,洞室开挖后由于二次应力的作用围岩有可能产生变形,因此合理的评价隧洞围岩变形稳定性问题具有重要的工程意义。鉴于此,文章针对金坪引水隧洞围岩变形稳定性问题,对隧洞在大埋深环境下的围岩应力分布特征进行了数值模拟分析,利用与围岩的应变率和岩体抗压强度相关的两种评价方法,分析了可能发生围岩变形的部位和洞段,对引水隧洞围岩变形稳定性做出了综合评价。
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| 关 键 词： | 引水隧洞 围岩变形 有限元 应变率 |
| 收稿时间： | 2004-11-23 |
| 修稿时间： | 2005-07-22 |
STABILITY EVALUATION OF THE DEFORMED SURROUNDING ROCK IN THE AQUEDUCT TUNNEL AT JINPING HYDROPOWER PLANT |
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| ZHANG Yong,NIE Dexin.STABILITY EVALUATION OF THE DEFORMED SURROUNDING ROCK IN THE AQUEDUCT TUNNEL AT JINPING HYDROPOWER PLANT[J].Journal of Engineering Geology,2005,13(4):461-464. |
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| Authors: | ZHANG Yong NIE Dexin |
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| Institution: | Chengdu University of Technology,Chengdu 610059 |
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| Abstract: | Secondary stress after excavation could result in deformation of the surrounding rock at Jinping hydropower plant because of deep embedment of the aqueduct tunnel and low compression strength of rock.Therefore,it is an important to appropriately evaluate stability of the deformed surrounding rock.This paper presents a numerical model for evaluating stress state and stability of the deformed surrounding rock under an embedment at a great depth.Two methods: one related to strain ratio and the other related to compression strength,were used to determine locations of deformed surrounding rock and overall stability of the surrounding rock. |
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| Keywords: | Aqueduct tunnel Deformed surrounding rock Finite element Strain ratio |
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