砂浆-灰岩双相材料剪切强度及压剪断裂判据探析  

DISCUSSION ABOUT SHEAR STRENGTH AND COMPRESS-SHEAR RUPTURE CRITERION OF TWO PHASE STUFF OF SAND GROUT-LIMESTONE

作　　者：郭中华[1] 王炜[1] 陆建[1] 朱珍德[2] 余湘娟[2] 

机构地区：[1]东南大学交通学院,南京210018 [2]河海大学岩土工程研究所,南京210098

出　　处：《岩石力学与工程学报》2003年第3期429-433,共5页Chinese Journal of Rock Mechanics and Engineering

基　　金：中国博士后自然科学基金;河海大学科技创新基金联合资助项目(2001401743)

摘　　要：针对某重力坝工程提供的砂浆与灰岩材料的圆柱体试件,采用RMT-150多功能刚性伺服试验机,分别进行了灰岩的单轴压缩试验与砂浆-灰岩双相材料的胶结面直剪试验,通过试验可获得灰岩的弹性模量、泊松比和双相材料胶结面的抗剪强度与强度参数。基于应力强度因子的概念,给出了压剪断裂的判据,可用来评价坝体的抗滑稳定性。建立了胶结面的强度参数与试件尺寸、弹性模量及灰岩的剪切模量与弹性模量的关系式,为实际工程提供参考。Contraposing the sand grout-limestone抯 cylinder specimen taking from a gravity dam engineering,the uniaxial compression test of limestone and the straight shear test of two phase stuff gumming face of sandgrout-limestone are made by RMT-150 multifunctional rigidity servo testing machine.Via the tests,the elasticmodulus,Poisson抯 ratio of limestone and shearing strength,intensive parameters of two phase stuff gumming face are obtained. Thereby,the compress-shear rupture criterion is presented to estimate dam stability besed on the idea of stress intensity factor. The relationship among gumming face strength,specimen size and elastic modulus,and that expression between the shear modulus and elastic modulus of limestone are found,which can be valuablereference for practical engineering.

关 键 词：岩石力学 砂浆 灰岩 胶结面 单轴压缩试验 剪切强度 压剪断裂 直剪试验 

分 类 号：TU452[建筑科学—岩土工程] TU578.1[建筑科学—土工工程]