| 岩体扰动深度估算的应力场方法 |
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| 引用本文： | 晏长根,林峰,伍法权,杨晓华.岩体扰动深度估算的应力场方法[J].长安大学学报(自然科学版),2011(4):68-72. |
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| 作者姓名： | 晏长根 林峰 伍法权 杨晓华 |
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| 作者单位： | 长安大学公路学院;成都理工大学地质灾害防治与地质环境保护国家重点实验室;中国科学院工程地质重点实验室; |
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| 基金项目： | 地质灾害防治与地质环境保护国家重点实验室开放基金项目(SKLGP2010K016); 中央高校基本科研业务费专项资金项目(CHD2009JC007) |
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| 摘 要： | 针对开挖导致岩体应力场改变、扰动深度估算这一岩体力学的难题,从岩体应力场的变化出发,结合岩体结构面力学特点,推导出岩体卸荷破坏导致岩体破坏的判别公式,为岩体强开挖扰动带深度的确定推导出理论估算公式。以小湾坝基岩体开挖为例,结合判别公式和数值分析结果,对坝基岩体的强开挖扰动带、弱开挖扰动带及应力调整带进行了分析。结果表明,在坝基底部,强开挖扰动带深度为3~5 m,弱开挖扰动带深度为4~10 m,应力调整带深度为10~25 m,其结果与现场钻孔电视探测结果基本吻合。
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| 关 键 词： | 岩土工程 应力场 开挖扰动带 应力调整带 小湾坝基 |
Evaluating rock masses excavation disturbed zone with method of stress redistribution |
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| YAN Chang-gen,LIN Feng,WU Fa-quan,YANG Xiao-hua.Evaluating rock masses excavation disturbed zone with method of stress redistribution[J].JOurnal of Chang’an University:Natural Science Edition,2011(4):68-72. |
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| Authors: | YAN Chang-gen LIN Feng WU Fa-quan YANG Xiao-hua |
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| Institution: | YAN Chang-gen1,LIN Feng2,WU Fa-quan3,YANG Xiao-hua1(1.School of Highway,Chang'an University,Xi'an 710064,Shaanxi,China,2.State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,Sichuan,3.Key Laboratory of Engineering Geology,Chinese Academy of Sciences,Beijing 100029,China) |
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| Abstract: | The stress will be redistributed in the rock mass after excavation,and the deformation of rock mass will be produced to balance the stress adjustment,then the mechanics properties of the rock mass near to the excavation surface will be deteriorated greatly.The formula for evalu-ating the excavation disturbed zone is derived with the method of rock stress redistribution and combined the characteristics of the structural surface of rock masses.Taking Xiaowan dam base excavation as an example,the heavy excavat... |
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| Keywords: | geotechnical engineering stress field excavation disturbed zone stress readjusted zone Xiaowan dam base |
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