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Hoek-Brown经验强度准则的修正及应用 被引量:42

Modification of Hoek-Brown criterion and its application
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摘要 对Hoek-Brown强度准则中岩体地质力学指标GSI和扰动参数D的评估值进行统计分析发现,不同评估者对岩体GSI值的评估有较强的一致性,而对D值的评估则呈现很高离散性.扰动参数D的评估值的离散性是岩体力学参数估计值可靠度降低的主要原因,因此,对Hoek-Brown经验强度准则而言,给出一种更为准确的D值确定方法是十分必要的.通过分析现有的岩体扰动参数确定方法的局限性以及基于声波测试理论的岩体完整性评价方法,探讨了基于声波传播速度的扰动参数D的确定方法以及在实际工程中考虑或忽略开挖扰动的基本原则,并通过有限元算例与Hoek等人的理论进行了比较. The statistic analysis of the estimated values of geology strength index(GSI) and disturbed factor D for rock masses is carried out which are the main parameters in the Hoek-Brown strength criterion(2002 edition). It indicates that the GSI values of the same type rock mass estimated by different participators are relatively consistent; however, the estimated D values are much more dispersive which will make the reliability of the estimated parameters of rock masses lower. Therefore, a more precision method is needed. A new exact method to determine the D value is proposed based on the elastic wave test theory. The main principle that the disturbed zone should be considered or neglected is discussed. A simple finite element example is given to compare the theory of Hoek and this paper.
出处 《武汉大学学报(工学版)》 CAS CSCD 北大核心 2008年第1期63-66,124,共5页 Engineering Journal of Wuhan University
基金 雅砻江水电开发联合研究基金重点项目(编号:50539100) 国家杰出青年科学基金(编号:50725931) 国家自然科学基金面上项目(编号:50779050) 教育部新世纪优秀人才支持计划资助项目(编号:NCET-06-0616) 湖北省自然科学基金杰出青年人才项目(编号:2007ABB026)
关键词 Hoek—Brown强度准则 扰动区 扰动参数D 弹性波检测 Hoek-Brown criterion disturbed zone disturbed factor D elastic wave test
作者简介 孙金山(1980-),男,山东潍坊人,博士研究生,主要从事岩石力学与工程方面的研究.
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参考文献7

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二级参考文献14

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