【作者】 阎宗岭； 姜永东； 张海龙； 阳兴洋； 熊令；

【Author】 YAN Zongling~1,JIANG Yongdong~2,ZHANG Hailong~3,YANG Xingyang~2,XIONG Ling~2 (1.China Merchants Chongqing Communications Research and Design Institute,Ltd,Chongqing 400067,China;2.key laboratory of Exploitation of ministry of education for Southwest Resources and Environmental Disaster Control Engineering,Chongqing University,Chongqing 400044,China;3.Yunnan Yunyi Mining Engineering,Ltd,Kunming,Yunnan 650224,China)

【机构】 招商局重庆交通科研设计院有限公司； 重庆大学西南资源开发及环境灾害控制工程教育部重点实验室； 云南云一矿山工程有限公司；

【摘要】 为了模拟风化作用对岩石力学特性的影响,利用MTS815岩石力学测试系统研究了砂岩在干湿循环条件下的变形与力学特性,得出主要结论为:岩石应力应变全过程曲线可分为四个阶段,即初始压密阶段、弹性阶段、应变硬化阶段和应变软化阶段;随干湿循环次数的增加,试件的变形增大;干湿循环作用下,岩石的单轴抗压强度、弹性模量和E₅₀模量减小,且与干湿循环次数呈对数函数关系。研究成果为岩石工程设计与保护提供了重要的理论和工程实际意义。更多还原

【Abstract】 In order to simulate the influence of the weathering or the rock mechanics characteristics,this paper experimental studied the deforming and mechanical properties of sandrock in the dry and wet cycles conditions by using MTS815 rock stress test system.（1） rock stress-strain curves of the whole process can be divided into four stages:the initial compaction stage,the elastic stage,the strain hardening stage,strain softening stage;（2） The more cycles of wet and dry,the bigger of the deforming of specimen;Under the effection of dry and wet cycles, the uniaxial compressive strength,modulus of elasticity,modulus of E₅₀ became smaller;and all these element have a logarithm fuction realationgship with dry and wet cycles.Research results have important thory and practical significance for the rock engineering design and protection.更多还原