干湿-冻融循环下岩样物理力学特性试验研究  

Experimental Study on Physical and Mechanical Properties of Rock Samples Under Dry-Wet-Freeze-Thaw Cycles

作　　者：管仁秋 王华俊 汤斌 卿翠贵 姚文杰 王凯[2] Guan Renqiu;Wang Huajun;Tang Bin;Qing Cuigui;Yao Wenjie;Wang Kai(Zhejiang Engineering Survey and Design Institute Group Co.,Ltd.,Ningbo 315012,Zhejiang,China;Shaoxing University,Shaoxing 312000,Zhejiang,China)

机构地区：[1]浙江省工程勘察设计院集团有限公司,浙江宁波315012 [2]绍兴文理学院,浙江绍兴312000

出　　处：《科技通报》2023年第4期62-67,86,共7页Bulletin of Science and Technology

基　　金：浙江省新苗人才计划项目(2018R432033)。

摘　　要：为研究干湿循环与冻融循环耦合作用下,对取自宁波地区的凝灰岩进行不同干湿-冻融循环试验,研究其物理力学性能变化规律。研究结果表明:经历不同干湿-冻融循环次数后,岩样表面只有微小颗粒脱落;且整体岩样质量随着冻融循环次数的增加而逐渐减少,但变化程度相较整体质量而言较小;干湿循环对于岩样的波速影响远小于冻融循环对于岩样波速的影响,且随着干湿循环次数的增加,岩样经历冻融循环后的波速变化程度逐渐增大;岩样的单轴压缩强度也随着干湿-冻融循环次数的增加而降低,且干湿循环次数越大,降低程度越大。本文可对凝灰岩物理力学性能的研究提供一定的参考价值。In order to study the coupling effect of dry-wet cycle and freeze-thaw cycle,this paper conducts different dry-wet-freeze-thaw cycle tests on the tuff taken from Ningbo area to study its physical and mechanical properties.The results of the study show that after different times of dry-wet-freeze-thaw cycles,only tiny particles fall off on the surface of the rock sample;and the overall quality of the rock sample gradually decreases with the increase of the number of freeze-thaw cycles,but the degree of change is greater than the overall quality.Small;the influence of the dry-wet cycle on the wave velocity of the rock sample is much smaller than the influence of the freeze-thaw cycle on the wave velocity of the rock sample,and with the increase of the number of dry-wet cycles,the wave speed change degree of the rock sample after the freeze-thaw cycle gradually increases;The uniaxial compressive strength also decreases as the number of dry-wet-freeze-thaw cycles increases,and the greater the number of dry-wet cycles,the greater the degree of decrease.This research will provide some reference value for the study of physical and mechanical properties of tuff.

关 键 词：干湿-冻融循环 饱和凝灰岩 单轴压缩试验 冻融系数 

分 类 号：TU45[建筑科学—岩土工程]