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Stress-Strain Strength Characteristics of Undisturbed Granite Residual Soil Considering Different Patterns of Variation of Mean Effective Stress

文献类型：期刊论文

作者Shu, Rongjun1,2; Kong, Lingwei1,2; Liu, Bingheng1,2; Wang, Juntao1,2
刊名APPLIED SCIENCES-BASEL
出版日期2021-02-01
卷号11期号:4页码:16
关键词undisturbed granite residual soil stress– strain strength ductility stiffness stress path mean effective stress
DOI10.3390/app11041874
英文摘要Granite residual soil is one of the most frequently encountered problem soils in tropical regions, whose mechanical behavior heavily depends on the pattern of variation of mean effective stress (p') during shearing, which can be classified into three categories: increasing-p', constant-p', and decreasing-p'. Unfortunately, so far, the stress-strain strength characteristics of granite residual soils have been studied mainly under increasing-p' stress paths, although it is very likely to encounter stress paths with decreasing p' in practice, especially in excavation engineering. Moreover, most pertinent research has focused on remolded granite residual soils, whereas undisturbed specimens have not yet received enough attention. In this paper, stress path triaxial tests considering different patterns of variation of mean effective stress were conducted on an undisturbed granite residual soil. Subsequently, a variable termed loading angle was introduced to quantitatively represent stress path. The influences of stress path on the Mohr-Coulomb strength parameters, deformation characteristics, ductility, and shearing stiffness were analyzed, with an emphasis on the role of pattern of variation of mean effective stress. The experimental results show that friction angle of the soil increases while cohesion decreases with the increase in loading angle. The increase in loading angle leads to less volume contraction and smaller failure strain. During shearing, the soil exhibited a less brittle response under stress paths with smaller loading angles. The initial secant shear modulus first decreased and then increased as the loading angle increased, with the minimum shearing stiffness occurring at a certain loading angle lying between 90 degrees and 123.7 degrees.
资助项目National Natural Science Foundation of China[11672320]
WOS研究方向Chemistry ; Engineering ; Materials Science ; Physics
语种英语
WOS记录号WOS:000632077700001
出版者MDPI
源URL[http://119.78.100.198/handle/2S6PX9GI/25918]  
专题中科院武汉岩土力学所
通讯作者Kong, Lingwei
作者单位1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Shu, Rongjun,Kong, Lingwei,Liu, Bingheng,et al. Stress-Strain Strength Characteristics of Undisturbed Granite Residual Soil Considering Different Patterns of Variation of Mean Effective Stress[J]. APPLIED SCIENCES-BASEL,2021,11(4):16.
APA Shu, Rongjun,Kong, Lingwei,Liu, Bingheng,&Wang, Juntao.(2021).Stress-Strain Strength Characteristics of Undisturbed Granite Residual Soil Considering Different Patterns of Variation of Mean Effective Stress.APPLIED SCIENCES-BASEL,11(4),16.
MLA Shu, Rongjun,et al."Stress-Strain Strength Characteristics of Undisturbed Granite Residual Soil Considering Different Patterns of Variation of Mean Effective Stress".APPLIED SCIENCES-BASEL 11.4(2021):16.

入库方式： OAI收割

来源：武汉岩土力学研究所

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