岩土力学2013，Vol.34Issue(1)：13-22,10.
不同因素影响下层间错动带颗粒破碎和剪切强度特性试验研究
Particle crushing and shear behaviour of an infilled joint soil under different conditions
摘要
Abstract
The results of the samples with three different types of infilled joint soils (mud with fragment, mud with sand and muddy) and the ones with three different water contents (10% ,7% and 3%)around the in-situ water content by the reversal direct shear tests (normal stress is between 2 Mpa and 10 Mpa) and particle size distribution (PSD) tests (around the shear zones) were compared to get the effects of the different initial particle size distributions and water contents on the infilled joint soil. Some conclusions are drawn as follows. ①The degree of particle crushing is higher quantified by B, index (relative particle crushing potential) for the coarser particles (d60 is greater). ②Dry particles (lower water content) tend to crush to tiny particles due to abrasion and wet particles (higher water content) generate more relative large particles due to fracture or attribution. ③Coarse particles have limited effect on the peak strength; besides nonlinearity of residual strength envelope is higher for coarser particles(d60 is greater). ④ Cohesion and friction angle decrease linearly with water content; moreover the samples with lower contents have a higher nonlinear residual strength envelope.⑤The residual friction angle decreases linearly with clay fraction; in addition, the equation proposed could be used to estimate the residual friction angle of the infilled joint soils preliminarily in practice.关键词
层间错动带/反复直剪/残余抗剪强度/高压/颗粒破碎/颗粒粒径分布Key words
infilled joint soil/ multi-reversal direct shear/ residual shear strength/ high pressure/ particle crushing/ particle size distribution分类
建筑与水利引用本文复制引用
赵阳,周辉,冯夏庭,邵建富,江权,闵弘,江亚丽,黄可..不同因素影响下层间错动带颗粒破碎和剪切强度特性试验研究[J].岩土力学,2013,34(1):13-22,10.基金项目
国家重点基础研究发展计划(973)项目(No.2010CB732006) （973）
国家自然科学基金(No.50979104) （No.50979104）
中国科学院知识创新工程重要方向项目(No.KZCX2-EW-QN115). （No.KZCX2-EW-QN115）
