摘要
对三峡闪云斜长花岗岩开展了四点弯曲Ⅰ─Ⅱ复合型断裂试验，测得了ＫⅠ和ＫⅡ，根据试验结果拟合出了临界断裂判据经验公式，并与最大拉应力和最大拉应变理论作了比较分析。模拟三峡船闸高边坡开挖施工过程进行了断裂有限元计算，采用经验断裂判据对船闸边坡岩体裂隙扩展的稳定性作了评价。
The fracture test of four-point bending Ⅰ─Ⅱ mixed mode for the Three Gorges's granite has been done and stress intensity factor KⅠand KⅡ are obtained. According to the test results, the experimental formula of the critical fracture criteria is fitted.It is compared with the criteria of maximum tension stress and maximum tension strain. Modelling excavation and construction, fracture FE analysis for the high slope of shiplock of the Three Gorges Project are done. Finally, the stability of crack propagation of the slope rockmass is discussed by adapting the experimental fracture criteria.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
1996年第1期62-70,共9页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金
关键词
船闸
高边坡
开挖
花岗岩
断裂试验
数值分析
mixed mode fracture, stress intensity factor, fracture criteria, fracture FE, granite, high slope
