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Disintegration characteristics in granite residual soil and their relationship with the collapsing gully in South China

文献类型：期刊论文

作者Li, Chengsheng1,2; Kong, Lingwei1,2; Shu, Rongjun1,2; An, Ran1,2; Zhang, Xianwei1,2
刊名OPEN GEOSCIENCES
出版日期2020
卷号12期号:1页码:1116-1126
关键词disintegration granite residual soil collapsing gully NMR
ISSN号2391-5447
DOI10.1515/geo-2020-0178
英文摘要The climate is a significant factor affecting the collapsing gully in weathered granite areas, and most of the surface layers of the collapsed area comprise granite residual soil. Granite residual soil has complex disintegration characteristics under different initial water content conditions. Besides, its disintegration characteristic is an essential factor for collapsing gully. Therefore, disintegration tests, triaxial shear tests, nuclear magnetic resonance tests, and hydraulic conductivity tests are conducted under torridity and rainstorm conditions in order to study the disintegration characteristics of granite residual soil. The results of disintegration test showed that the initial disintegration rate of granite residual soil increased rapidly with the decrease in water content, while the relationship between disintegration rate and water content in the later stage of disintegration is unclear. When soaked, the maximum decrease in cohesion was 44.48%, the hydraulic conductivity became six times larger, and the amplitude of the T-2 curve increased by about 40%, which reduced the strength of the soil and provided better access for rainwater infiltration to deeper stratum. The results show that the microstructure of granite residual soil would be damaged and the disintegration would occur after a rainstorm at low water content. Micropores would be formed inside the sample after soaking, resulting in destroying the continuity of the material.
资助项目National Natural Science Foundation of China[11672320] ; National Natural Science Foundation of China[41372314]
WOS研究方向Geology
语种英语
WOS记录号WOS:000590074600001
出版者DE GRUYTER POLAND SP Z O O
源URL[http://119.78.100.198/handle/2S6PX9GI/25254]  
专题中科院武汉岩土力学所
通讯作者Li, Chengsheng
作者单位1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Li, Chengsheng,Kong, Lingwei,Shu, Rongjun,et al. Disintegration characteristics in granite residual soil and their relationship with the collapsing gully in South China[J]. OPEN GEOSCIENCES,2020,12(1):1116-1126.
APA Li, Chengsheng,Kong, Lingwei,Shu, Rongjun,An, Ran,&Zhang, Xianwei.(2020).Disintegration characteristics in granite residual soil and their relationship with the collapsing gully in South China.OPEN GEOSCIENCES,12(1),1116-1126.
MLA Li, Chengsheng,et al."Disintegration characteristics in granite residual soil and their relationship with the collapsing gully in South China".OPEN GEOSCIENCES 12.1(2020):1116-1126.

入库方式： OAI收割

来源：武汉岩土力学研究所

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