水利学报2017，Vol.48Issue(10)：1175-1184,10.DOI:10.13243/j.cnki.slxb.20170231
大理岩干湿循环力学特性试验研究
Experimental study on mechanical properties of marble under hydraulic weathering coupling
摘要
Abstract
Aiming at the deterioration of performance under the action of hydraulic weathering of rock mass located in reservoir water fluctuating zone,the marble of Jinping hydropower station is chosen as the re search object.A series of uniaxial and triaxial compression experimental tests on the marble under dry-wet cycling have been carried out to study the mechanical properties of marble,such as strength,deformation behavior and failure mode.The experimental results show that there is a negative correlation between the uniaxial peak strength of marble and the number of dry-wet circulation,and the degradation effect under the initial stage of cycle is remarkable;the internal friction angle of the marble after a small number of cycling times is almost constant,while the cohesion has decreased remarkably.In general,the effect of dry-wet cycling on marble cohesion is more sensitive than internal friction angle.The dry-wet cycling has a certain degree of softening effect on the marble and the elastic modulus of the marble decreases to the critical value after multiple repeated cycles.The increase in confining pressure can effectively weaken the softening effect.关键词
大理岩/干湿循环/力学特性/试验研究Key words
rock mechanics/marble/dry-wet cycling/mechanical properties/experimental study分类
天文与地球科学引用本文复制引用
王伟,龚传根,朱鹏辉,朱其志,徐卫亚..大理岩干湿循环力学特性试验研究[J].水利学报,2017,48(10):1175-1184,10.基金项目
国家自然科学基金项目(11672343,51679068) （11672343,51679068）
中央高校基本科研业务费专项资金项目(2016B20214) （2016B20214）
