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    基于改进GSI体系确定三峡地下厂房围岩等效变形模量及强度

    黄达 黄润秋 张永兴

    黄达, 黄润秋, 张永兴, 2009. 基于改进GSI体系确定三峡地下厂房围岩等效变形模量及强度. 地球科学, 34(6): 1030-1036.
    引用本文: 黄达, 黄润秋, 张永兴, 2009. 基于改进GSI体系确定三峡地下厂房围岩等效变形模量及强度. 地球科学, 34(6): 1030-1036.
    HUANG Da, HUANG Run-qiu, ZHANG Yong-xing, 2009. Equivalent Deformation Modulus and Strength Parameters of Surrounding Rock for the Underground Powerhouse of Three Gorges Project Based on the Modified GSI System. Earth Science, 34(6): 1030-1036.
    Citation: HUANG Da, HUANG Run-qiu, ZHANG Yong-xing, 2009. Equivalent Deformation Modulus and Strength Parameters of Surrounding Rock for the Underground Powerhouse of Three Gorges Project Based on the Modified GSI System. Earth Science, 34(6): 1030-1036.

    基于改进GSI体系确定三峡地下厂房围岩等效变形模量及强度

    基金项目: 

    教育部博士点新教师基金项目 200806111012

    中国博士后科学基金项目 20080440703

    地质灾害防治与环境保护国家重点实验室(成都理工大学) 开放基金项目 GZ2007-13

    详细信息
      作者简介:

      黄达(1976-), 男, 博士, 讲师, 重庆大学土木工程博士后流动站在站博士后, 主要从事岩土体稳定性评价及其灾害防治方面的教学和科研工作.E-mail: hdcqy@yahoo.com.cnhdcqy@yahoo.com.cn

    • 中图分类号: P642

    Equivalent Deformation Modulus and Strength Parameters of Surrounding Rock for the Underground Powerhouse of Three Gorges Project Based on the Modified GSI System

    • 摘要: 基于地质强度指标GSI体系和Hoek-Brown强度准则, 研究岩体强度及变形模量时没有考虑到结构面产状对工程岩体参数的影响.结合三峡工程地下厂房, 根据围岩开挖面与结构面分布的空间位置关系, 确定了结构面分布对围岩结构等级SR的影响系数, 改进了GSI体系中围岩SR的统计方法, 确定了围岩的等效变形模量和强度参数.研究表明, 改进后的GSI体系求解的围岩弹性区等效弹性模量、扰动区等效变形模量和粘聚力分别减小了约15%、8%和28%的误差.

       

    • 图  1  修正的定量GSI体系(Sonmez et al., 2004)

      Fig.  1.  Modified quantitative GSI system

      图  2  体积节理数与节理面密度的关系(Palmström, 1996)

      Fig.  2.  The connection between joint density in a surface and volumetric joint count

      图  3  结构面极点密度等值线

      Fig.  3.  Polar density contour of structure planes

      图  4  围岩H-B强度准则曲线

      Fig.  4.  The curve of H-B strength rule of surrounding rock

      图  5  现场岩体剪切试验结果

      Fig.  5.  Result of shear test on the site

      表  1  岩体扰动因子D的建议值(Hoek et al., 2002)

      Table  1.   Proposed disturbed coefficient of rock mass

      表  2  SR修正参数及结构面统计

      Table  2.   Modified parameters of SR and statistics of structure plane quantity

      表  3  结构面性状描述

      Table  3.   Description for character of structure planes

      表  4  结构面表面特征SCR值统计

      Table  4.   Statistic result of surface condition rating (SCR) of structure planes

      表  5  变形模量及抗剪强度

      Table  5.   Deformation modulus and resisting shear strength

      表  6  H-B强度参数

      Table  6.   Strength parameters of H-B yield rule

      表  7  围岩参数反演结果

      Table  7.   Back analysis result of surrounding rock parameters

    • [1] Hoek, E., 1994. Strength of rock and rock masses. ISRM News Journal, 2 (2): 4-16.
      [2] Hoek, E., Brown, E. T., 1997. Practical estimates of rock mass strength. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 34 (8): 1165-1186.
      [3] Hoek, E., Carranza-Torres, C., Corkum, B., 2002. Hoek-Brown failure criterion—2002 edition. In: Hammah, R., Bawden, W., Curran, J., et al., eds., Proceedings of NARMS-TAC 2002, Mining innovation and technology. University of Toronto, Toronto, 267-273.
      [4] Hoek, E., Marinos, P., Benissi, M., 1998. Applicability of the geological strength index (GSI) classification for very weak and sheared rock masses: The case of the Athens schist formation. Bull. Eng. Geol. Environ., 57 (2): 151-160. doi: 10.1007/s100640050031
      [5] Huang, R. Q., Huang, D., 2008. Experimental research on mechanical properties of granites under unloading condition. Chinese Journal of Rock Mechanics and Engineering, 27 (11): 2205-2213 (in Chinese with Englishabstract).
      [6] Li, J. L., Wang, L. H., 2003. Study on size effect of unloaded rock mass. Chinese Journal of Rock Mechanics and Engineering, 22 (12): 2032-2036 (in Chinese with Eng-lish abstract).
      [7] Li, N., Duan, X. Q., Chen, F. F., et al., 2006. A back analysis method for elastoplastic displacement of broken rock zone around tunnel. Chinese Journal of Rock Mechanics and Engineering, 25 (7): 1304-1308 (in Chinese withEnglish abstract).
      [8] Palmström, A., 1996. Characterizing rock masses by the RMI for use in practical rock engineering—Part 1: The development of the rock mass index (RMI). Tunnelling and Underground Space Technology, 11 (2): 175-188. doi: 10.1016/0886-7798(96)00015-6
      [9] Sonmez, H., Gokceoglu, C., Ulusay, R., 2004. Indirect determination of the modulus of deformation of rock masses based on the GSI system. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 41: 849-857.
      [10] Sonmez, H., Ulusay, R., 1999. Modifications to the geological strength index (GSI) and their applicability to stability of slopes. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 36: 743-760.
      [11] Wu, Z. Z., Wang, Q., 2006. Back analysis of viscoelastic rock mass parameters based on improved genetic algorithm. Coal Geology & Exploration, 34 (3): 44-46 (in Chi-nese with English abstract).
      [12] Zhang, L. W., Ding, W. T., Li, S. C., 2005. A displacement-based inverse analysis of rock mass parameters for rock stability evaluation. China Civil Engineering Journal, 38 (5): 82-86 (in Chinese with English abstract).
      [13] 黄润秋, 黄达, 2008. 卸荷条件下花岗岩力学特性试验研究. 岩石力学与工程学报, 27 (11): 2205-2213. doi: 10.3321/j.issn:1000-6915.2008.11.005
      [14] 李建林, 王乐华, 2003. 卸荷岩体的尺寸效应研究. 岩石力学与工程学报, 22 (12): 2032-2036. doi: 10.3321/j.issn:1000-6915.2003.12.015
      [15] 李宁, 段小强, 陈方方, 等, 2006. 围岩松动圈的弹塑性位移反分析方法探索. 岩石力学与工程学报, 25 (7): 1304-1308. doi: 10.3321/j.issn:1000-6915.2006.07.002
      [16] 伍振志, 王泉, 2006. 基于改进遗传算法的粘弹性岩体力学参数反演. 煤田地质与勘探, 34 (3): 44-46. doi: 10.3969/j.issn.1001-1986.2006.03.012
      [17] 张乐文, 丁万涛, 李术才, 2005. 岩体参数反演计算的稳定性研究. 土木工程学报, 38 (5): 82-86. doi: 10.3321/j.issn:1000-131X.2005.05.015
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    出版历程
    • 收稿日期:  2009-04-23
    • 刊出日期:  2009-11-25

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