STRENGTH ESTIMATION OF COLUMNAR JOINTED BASALTIC MASS BASED ON GEOLOGICAL STRENGTH INDEX
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摘要: 节理岩体的强度是岩体工程设计的重要参数, 柱状节理岩体作为一种具有柱状镶嵌结构的特殊节理岩体, 缺乏相似的工程案例, 其岩体强度的确定是目前水电工程中的热点问题。本文综述了国内外相似工程中柱状节理岩体强度的研究进展, 以白鹤滩水电工程为例, 结合Hoek和Brown最新提出的地质强度指标法和强度准则估算了不同爆破损伤下的柱状镶嵌块状结构和柱状镶嵌碎裂结构柱状节理岩体的强度参数, 并得到白鹤滩水电站的原位试验成果的验证, 计算表明基于地质强度指标法的Hoek和Brown强度准则能较好的反映柱状节理岩体的强度参数。
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关键词:
- 柱状节理 /
- 岩体强度 /
- 地质强度指标法 /
- Hock-Brown强度准则
Abstract: The strength parameters of jointed rock mass are important to rock engineering design.The columnar jointed basaltic mass is special with columnar mosaic structure and the similar engineering case la cks.The strength of columnar jointed basaltic mass currently becomes an advanced research hotspot in hydropower project.This paper reviews domestic and international researches on strength of columnar jointed basaltic mass.Taking the columnar jointed basaltic at Baihetan Hydropower Station as an example, the GSI and Hoek-Brown Criterion are applied to estimate strength parameters of columnar mosaic blocky and cataclastic basaltic masses under different blasting damages.The result is proved by in situ tests at Baihetan Hydropower Station.It is concluded that the GSI-based Hoek-Brown Criterion can better reflect real strength parameters of columnar jointed basaltic masses. -
表 1 基于GSI估算的白鹤滩水电站柱状节理玄武岩体强度
Table 1. Strength parameters of columnar jointed basalt estimated by GSI at Baihetan hydropower station
表 2 岩体抗剪断试验成果
Table 2. Shear test results of rock mass
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[1] Hoek E, Brown E T.Underground Excavations in Rock[M].London:Institution of Mining and M etallurgy, 1980. [2] Hoek E, Brown E T. The Hoek-Brown failure criterion-a 1988 update[A]. Proc. 15th Canadian Rock Mech. Symp. (ed. J. H. Curran), pp. 31 ~ 38. Toronto : Civil Engineering Dept, University of Toronto, 1988. [3] Hoek E, CarranzaTorres C T, Corkum B. Hoek-Brown failure criterion-2002 edition[A]. Proc. North American Rock Mechanics Society Meeting, Toronto, 2002. [4] Hoek E, Diederichs M S.Empirical estimation of rock mass modulus[J].International Journal of Rock Mechanics and Mining Sciences, 2006, 43 (2):203 ~ 215. doi: 10.1016/j.ijrmms.2005.06.005 [5] Hoek E, Marinos P.A brief history of the development of the Hoek-Brown failure criterion[J].Soils and Rocks, 2007 (2):1 ~ 13. https://www.mendeley.com/research-papers/brief-history-development-hoekbrown-failure-criterion-2/ [6] Justo J L, Justo E, Durand P, et al.The foundation of a 40-storey tower in jointed basalt[J].International Journal of Rock Mechanics and Mining Sciences, 2006, 43 (2):267. doi: 10.1016/j.ijrmms.2005.07.007 [7] Schultz R A.Limits on strength and deformation properties of jointed basaltic rock masses[J].Rock Mechanics and Rock Engineering, 1995, 28 (1):1 ~ 15. http://cn.bing.com/academic/profile?id=8d169ff6318bc78701d400b05851ae57&encoded=0&v=paper_preview&mkt=zh-cn [8] 沈军辉, 王兰生.峨眉山玄武岩的岩相与岩体结构[J].水文地质工程地质, 2001, 28 (6):1 ~ 4. http://d.old.wanfangdata.com.cn/Periodical/swdzgcdz200106001Shen Jun-hui, Wang Lan-sheng.The lithofacies and the rock mass structure of Emei Mountain basalt rockmass[J]. Hydrogeology and Engineering Geology, 2001, 28 (6):1 ~ 4 (in Chinese). http://d.old.wanfangdata.com.cn/Periodical/swdzgcdz200106001 [9] Hoek E, Users's Guide of Roclab-Strength analysis of rock and soil masses by using the Hoek-Brown, Mohr-Coulomb failure criteria[M]. Rocscience Inc, 2003. -
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