冻融循环下多裂隙注浆岩石破坏特性试验研究  

作　　者：张庆[1] 王博 赵钰洲 

机构地区：[1]吉林建筑大学土木工程学院,吉林长春130000

出　　处：《科学技术创新》2021年第34期115-117,共3页Scientific and Technological Innovation

基　　金：吉林省教育厅“十三五”科学技术项目(JJKH20180605KJ)。

摘　　要：为了研究冻融环境下多裂隙注浆岩石破坏特性,对类岩石预制多裂隙试样及其注浆固结体开展自由饱水冻融试验,对冻融循环条件下的试样进行单轴压缩试验和同步DIC-3D观测。试验结果表明:(1)随着裂隙数量增多,应变突变值逐渐增大,裂隙数量增多到一定程度,应变突变值不再增大,突变位置数量增多;(2)通过冻融循环作用下多裂隙注浆岩石试验分析,荷载水平达到35%时试件右上方出现斜向裂纹,随着荷载水平不断提升,裂纹不断扩展和贯通,荷载水平达到60%时出现局部破坏,荷载水平再向上提升,应变快速增加,荷载水平达到100%时试件整体破坏。In order to study the destructive characteristics of grouting rocks with multiple fissures under freeze-thaw conditions,a free saturated water freeze-thaw test was carried out on the prefabricated multi-fissured rock-like samples and their grouting consolidated bodies.And the samples were given single Shaft compression test and simultaneous DIC-3D observation under the conditions of freeze-thaw cycles.The test results show that:(1)As the number of cracks increases,the strain mutation value gradually increases,the number of cracks increases to a certain extent,the strain mutation value no longer increases,and the number of mutation positions increases;(2)The multi-fissured grouting rock test under freeze-thaw conditions shows that when the load level reaches 35%,an oblique crack appears on the upper right of the specimen.As the load level continues to increase,the cracks continue to expand and penetrate.When the load level reaches 60%,local failure occurs,and the load level increases again.,The strain increases rapidly,and the specimen is destroyed when the load level reaches 100%.

关 键 词：冻融循环 多裂隙岩石 注浆加固 

分 类 号：TU452[建筑科学—岩土工程]