摘要
针对水电站边坡岩体在库水浸泡、水位涨落或降雨作用下容易发生滑坡灾害的现象,选取某水电站边坡砂岩为研究对象,研究饱水和干湿循环作用对其力学特性的影响规律,提出了通过比较天然状态、饱水作用以及干湿循环下岩石试样的强度和变形参数的方法.结果表明,随着水岩作用次数的增加,砂岩单轴抗压强度和弹性模量不断减小并趋于恒定,其两者与水岩作用次数呈对数关系,经过干湿循环的试块抗压强度和弹性模量小于经过饱水作用试块.
Aiming at the common landslide disaster of side slope rock mass of hydropower station under the effect of reservoir water immersion,water level fluctuation or rainfall,the slope sandstone of hydropower station was selected as the object for research,and the influence of water-saturated effect and dry-wet cycle on its mechanical properties was studied.In addition,a method of comparing the strength and deformation parameters for the rock samples under natural state,water-saturated effect and dry-wet cycle was proposed.The results show that with the increasing time of water-rock interaction,the uniaxial compressive strength and elastic modulus of sandstone decrease and tend to be constant,and both uniaxial compressive strength and elastic modulus show a logarithmic relationship with the times of water-rock interaction.Furthermore,the compressive strength and elastic modulus of specimens after wet-dry cycle are smaller than those of specimens under saturated-water effect.
作者
付建军
董正东
杨艳霜
易恒
FU Jian-jun;DONG Zheng-dong;YANG Yan-shuang;YI Heng(Hunan Provincial Key Laboratory of Hydropower Development Key Technology, Power China Zhongnan Engineering Corporation Limited, Changsha 410014, China;School of Civil Engineering and Environment, Hubei University of Technology, Wuhan 430068, China)
出处
《沈阳工业大学学报》
EI
CAS
北大核心
2020年第3期350-354,共5页
Journal of Shenyang University of Technology
基金
国家自然科学基金项目(51609080)
水能资源利用关键技术湖南省重点实验室开放研究基金项目(PKLHD201403).
关键词
干湿循环
饱水作用
单轴抗压强度
弹性模量
水岩作用
砂岩
变形参数
边坡滑坡
wet-dry cycle
water-saturated effect
uniaxial compressive strength
elastic modulus
water-rock interaction
sandstone
deformation parameter
side slope sliding
