分区破裂相似材料分层观测试验研究  

Experiment on layered observation of zonal disintegration of split similar material

作　　者：张智慧[1] 王学滨[1] 潘一山[1] 粟爱国[1] 

机构地区：[1]辽宁工程技术大学力学与工程学院,辽宁阜新123000

出　　处：《水资源与水工程学报》2010年第5期1-5,共5页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金项目(50974069);国家重点基础研究发展规划(973)项目(2010CB226803);辽宁工程技术大学优秀青年基金资助项目(09-212)

摘　　要：以沙土作为相似材料,观测了圆桶模型内部裂纹的分布规律及沿轴向的变化规律。研究表明:在若干沙土层间预制界面,然后将各层沙土依次从铁桶中压出的实验方法可以更深入地观测硐室围岩裂纹沿轴向的变化规律。巴西圆盘模型不能解释分区破裂现象,而用空间共轭剪切带解释则更加合理。支护对分区破裂有一定的影响。Taking sandy soil as similar material,the crack distribution and its change rule along the axial direction of the barrel model were observed.Research found out the present method that an interface was set between two sand blocks and squeezed out from the steel barrel can successfully observed the crack distribution within the sand blocks and its change along the axis.The Brazilian disk model cannot explain the observed splitting phenomenon.However,the spatial conjugate shear bands can more rationally explain the phenomenon.The support has certain effect on the zonal disintegration phenomenon.

关 键 词：分区破裂化 空间共轭剪切带 相似材料 裂纹分布规律 

分 类 号：TV321[水利工程—水工结构工程]