期刊论文

Experimental Investigation on the Failure Mechanism of Red Soil Slope under Cyclic Wetting and Drying

中文

长江科学院院报

1001-5485

2018

35

2

73-77

10.11988/ckyyb.20161052

51374129:国家自然科学基金 nhcx04:南华大学创新团队资助项目 2016XCX05:南华大学研究生创新项目

本校为第一机构

为了研究红土边坡在干湿交替条件下的破坏特征及其破坏机理,根据相似理论,建立了与工程边坡相似的模型边坡,采用测试元件,对试验边坡开展了长达一年半的监测,分析其在降雨、非降雨等干湿交替条件下边坡破坏特征及其破坏机理。研究结果表明:在非降雨条件下,试验边坡表面红土层裂缝的产生与其含水率有关,当其含水率低于27.5%时,其表面红土层开始产生裂缝,且裂缝数量和裂缝宽度随含水率的减小经历了缓慢增加、急剧增加和稳定发展的3个阶段;在干湿循环条件下,试验边坡表面红土层的裂缝经历了开裂、愈合、再开裂的循环过程,随降雨次数的增多,裂缝将沿边坡表面向其深部发展,且其宽度和深度也逐渐增加,...

To obtain the failure characteristics and failure mechanism of red soil slope in cyclic wetting-drying condition, physical model test was conducted in line with the similarity theory by monitoring the slope model for one year and a half. Results revealed that under drying condition,the generation of cracks on the surface of the red soil slope is related to water content; in particular,when water content is below 27.5%,cracks were generated on the surface of red soil; and with the decline of water content,the number and width of cracks experienced gentle increase, sharp increase and steady deve...