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工程科学与技术:2011,43(6):91-97
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坝区辉绿岩体的长期剪切流变强度分析研究
(1.山东大学 岩土与结构工程研究中心;2.中国水电顾问集团 成都勘测设计研究院)
Analysis and Research of Long-term Shear Rheology Strength of Dam Zone Diabase
(1.Research Center of Geotechnical and Structural Eng.,Shandong Univ.;2.Chengdu Hydroelectric Investigation & Design Inst.,China Hydropower Eng. Consulting Group Co.)
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投稿时间:2011-01-06    修订日期:2011-07-12
中文摘要: 岩体长期剪切流变强度是进行岩体工程长期运行稳定分析的重要基础。以大岗山水电站坝区辉绿岩现场剪切流变试验数据为基础,分别采用等时应力-应变曲线法、非稳定蠕变判别法和稳态蠕变速率法计算获得坝区辉绿岩的长期剪切流变强度,并进行了对比分析。采用等时应力-应变曲线法分析坝区辉绿岩的长期剪切流变强度较为科学合理。与岩体瞬时抗剪强度相比,长期剪切流变强度因裂隙损伤扩展有所降低,坝区岩体长期剪切流变的内摩擦角衰减了30.7%,长期剪切流变的粘聚力衰减了22.6%。
Abstract:The long-term shear rheology strength of rock mass is an important base to the analysis of long-term operation stability of the rock engineering. Based on field shear rheology test data of dam zone diabase of Dagangshan hydropower station, the long-term shear rheology strength was obtained by stress-strain isochronal curves method, steady-state creep rate method, and nonsteady-state creep method, respectively, and the results were compared and analyzed. The stress-strain isochronal curves method could provide a more scientific and reasonable way for the analysis of long-term shear rheology strength of diabase. Compared with the short-term shear strength, the long-term shear rheology strength by reason of crack damage propagation had some reduction, internal friction angle decreased by 30.7% and cohesion decreased by 22.6%.
文章编号:201100019     中图分类号:    文献标志码:
基金项目:国家重点基础研究发展计划资助项目(2009CB724607);教育部新世纪优秀人才支持计划资助项目(NCET-08-0336);国家自然科学基金资助项目(40772173)
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陈芳,张强勇,杨文东,李文纲,曾纪全,王建洪,贺如平.坝区辉绿岩体的长期剪切流变强度分析研究[J].工程科学与技术,2011,43(6):91-97.
Chen Fang,Zhang Qiangyong,Yang Wendong,Li Wengang,Zeng Jiquan,Wang Jianhong,He Ruping.Analysis and Research of Long-term Shear Rheology Strength of Dam Zone Diabase[J].Advanced Engineering Sciences,2011,43(6):91-97.