岩土力学2011，Vol.32Issue(9)：2584-2590,2602,8.
大岗山坝区岩体现场剪切蠕变试验及参数反演
Field shear creep test and creep parameters inversion for dam zone rock mass of Dagangshan hydropower station
摘要
Abstract
Field shear creep test is the most important means to understand the shear creep properties of rock mass. Field shear creep tests are carried out for the dam zone "hard brittle shatter" diabase dikes in Dagangshan hydropower station. The deformation law of shear creep and the characteristics of shear creep rates have been analyzed. The test results show that decay and steady creep only occur when shear stress is relatively low; however, the shear creep rate changes from gradual growth to sudden growth when shear stress reaches the yield strength, the rock breaks in a short time and the acceleration creep appears in the process of shear creep test. Under the constant normal stress, the relation expression between steady-state creep rate and shear stress of diabase can be expressed by an exponential equation. According to the shear creep curves of diabase, the shear creep model of rock is identified. The identification results show that Nishihara model could effectively describe the shear creep properties of dam zone diabase dikes. The shear creep parameters are got through the optimized back analysis method, which provides important mechanical parameters for design and construction of slope in dam zone.关键词
“硬、脆、碎”辉绿岩脉/现场剪切蠕变试验/剪切蠕变模型辨识/剪切蠕变参数反演Key words
"hard brittle shatter" diabase dikes/ field shear creep test/ shear creep model identification/ shear creep parameter inversion分类
数理科学引用本文复制引用
张强勇,陈芳,杨文东,李文纲,王建洪,贺如平,曾纪全..大岗山坝区岩体现场剪切蠕变试验及参数反演[J].岩土力学,2011,32(9):2584-2590,2602,8.基金项目
国家重点基础研究发展计划资助(No.2009CB724607) （No.2009CB724607）
教育部新世纪优秀人才支持计划资助(No.NCET-08-0336) （No.NCET-08-0336）
国家自然科学基金资助项目(No.40772173). （No.40772173）
