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

doi:10.3390/app11041874

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	Stress-Strain Strength Characteristics of Undisturbed Granite Residual Soil Considering Different Patterns of Variation of Mean Effective Stress
	Shu, Rongjun 1,2; Kong, Lingwei 1,2; Liu, Bingheng 1,2; Wang, Juntao 1,2
	2021-02-01
发表期刊	APPLIED SCIENCES-BASEL
卷号	11 期号:4 页码:16
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.
关键词	undisturbed granite residual soil stress– strain strength ductility stiffness stress path mean effective stress
DOI	10.3390/app11041874
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[11672320]
WOS研究方向	Chemistry ; Engineering ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Engineering, Multidisciplinary ; Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:000632077700001
出版者	MDPI
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.198/handle/2S6PX9GI/25919
专题	中科院武汉岩土力学所
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
第一作者单位	中科院武汉岩土力学所
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.

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