摘要
为对比不同水岩作用对充填节理岩石损伤劣化的影响,对干湿循环和持续浸泡两种水岩作用下充填节理岩石进行波速测定、静态单轴压缩试验和动态单轴冲击试验。首先分析了两种水岩作用对充填节理岩石波速值、静态和动态抗压强度以及能量耗散特性劣化效应的影响,然后对比了干湿循环作用后不同状态(干燥和含水状态)下充填节理岩石力学参数劣化效应的差异性。结果表明:水岩作用次数小于10次时,干湿循环作用下岩样的波速值显著小于持续浸泡作用下岩样的波速值,但随着水岩作用次数的增加,两者波速值的差距不断缩小;充填节理岩石的静态抗压强度、动态抗压强度和能量耗散率随着水岩作用次数的增加而不断降低,在20次干湿循环和持续浸泡作用下,充填节理岩石的静态抗压强度分别降低了27.16%和18.94%,动态抗压强度分别降低了23.33%和21.76%,能量耗散率分别降低了74.29%和59.71%,可见干湿循环作用对充填节理岩石的损伤劣化相比于持续浸泡作用更大。此外,干湿循环作用下干燥状态岩样静态抗压强度比含水状态岩样强度高,而干燥状态岩样动态抗压强度却比含水状态岩样强度低。
In order to compare the effects of different water-rock interactions on the damage and deterioration of filled jointed rock.The longitudinal wave velocity test,static uniaxial compression test and dynamic impact test are carried out on the filled jointed rock under the conditions of dry-wet cycle and continuous immersion.The effects of two different water-rock interactions on the wave velocity value,static and dynamic compressive strength,energy dissipation characteristics of filled jointed rocks are analyzed.Furthermore,the differences are compared in the degradation effects of mechanical parameters of filled jointed rock under different states(dry and water containing)after dry-wet cycle.The results show that,when the number of water-rock interactions is less than 10,the wave velocity of the rock sample under dry-wet cycle is significantly lower than that under continuous immersion.Howerver,with the increase of the water-rock interaction times,the difference in wave velocity values between the two cases is constantly narrowing.With the increase of the number of water-rock interactions,the static compressive strength,dynamic compressive strength and energy dissipation rate of the filled jointed rock decrease.Under 20 dry-wet cycles and continuous immersion,the static compressive strength of filled jointed rock decreased by 27.16% and 18.94%,the dynamic compressive strength decreased by 23.33% and 21.76%,and the energy dissipation rate decreased by 74.29% and 59.71%,respectively.It can be seen that the damage and deterioration of the filled jointed rock caused by the dry-wet cycles is greater than that caused by continuous immersion.In addition,the static compressive strength of the dry state rock sample is higher than that of the water-containing state rock sample after the action of dry-wet cycle,while the dynamic compressive strength of the dry state rock sample is lower than that of the water-containing state rock sample.
作者
柴少波
宋浪
周炜
付晓东
周永强
Chai Shaobo;Song Lang;Zhou Wei;Fu Xiaodong;Zhou Yongqiang(School of Civil Engineering,Chang'an University,Xi’an 710064,China;School of Civil Engineering,Hunan City University,Yiyang 413000,Hunan,China;Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,,Wuhan 430071,China)
出处
《吉林大学学报（地球科学版）》
CAS
CSCD
北大核心
2023年第5期1510-1520,共11页
Journal of Jilin University：Earth Science Edition
基金
国家自然科学基金项目(42172302,41902277)
西安市科协青年人才托举计划项目(095920201327)
中央高校基本科研业务费(300102282201)。
关键词
水岩作用
充填节理
干湿循环
持续浸泡
压缩特性
损伤劣化效应
water rock interaction
filled rock joint
dry-wet cycle
continuous immersion
com pression characteristic
damage and deterioration effect
