Post-cyclic mechanical behaviors of laterite clay with different cyclic confining pressures and degrees of reconsolidation

doi:10.1016/j.soildyn.2021.106986

	Post-cyclic mechanical behaviors of laterite clay with different cyclic confining pressures and degrees of reconsolidation
	Huang, Juehao 3,4,5,6; Chen, Jian 3,4,5,6; Ke, Wenhui 2; Zhong, Yu 1; Lu, Yuan 5,6; Yi, Shun 5,6
刊名	SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
	2021-12-01
卷号	151 页码:11
关键词	Laterite clay Post-cyclic mechanical behavior Cyclic confining pressure Degree of reconsolidation Strength enhancement
ISSN号	0267-7261
DOI	10.1016/j.soildyn.2021.106986
英文摘要	The post-cyclic mechanical behaviors of subgrade soil are usually assessed by conventional cyclic triaxial tests, however, the stress field induced by traffic loads consist of not only a cyclic deviator stress, but cyclic confining pressure and shear stress. Meanwhile, the pore water is allowed to be discharged under traffic loads. Furthermore, the traffic load-induced excess pore water pressure can be partially dissipated after load-cycling. Thus, different reconsolidation processes should be considered. Recognising this, cyclic loading with variable confining pressure was applied to remoulded laterite soils under partially drained conditions, and reconsolidation was allowed. The development of effective stress paths, excess pore water pressure, and undrained strength of postcyclic shear process were analysed. Results show that the development of effective stress paths is similar and all stress paths cross the critical state line. Besides which, the remoulded laterite clay always has a positive excess pore water pressure and tend to dilate. The undrained strength will be increased under different conditions such that the greater the cyclic confining pressure, cyclic deviator stress, number of cycles, and degree of reconsolidation, the larger post-cyclic undrained strength. Moreover, the post-cyclic undrained strengths between cyclic loading with and without cyclic confining pressure were compared: the undrained strength ratio of cyclic confining pressure to that under constant confining pressure increases linearly with increasing slope of the stress path. Nevertheless, the post-cyclic undrained strength after reconsolidation can be obtained by the corresponding undrained strength without reconsolidation: the ratios of post-cyclic shear strength with and without reconsolidation increase with increasing degree of reconsolidation. At a certain slope of stress path, the undrained strength increases linearly with degree of reconsolidation.
资助项目	National Natural Science Foundation of China[51909259] ; National Natural Science Foundation of China[52079135] ; International Partnership Program of Chinese Academy of Sciences[131551KYSB20180042]
WOS研究方向	Engineering ; Geology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000701932100003
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/28554]
专题	中科院武汉岩土力学所
通讯作者	Huang, Juehao
作者单位	1.Wuhan Metro Grp Co Ltd, Wuhan 430070, Peoples R China 2.Wuhan Municipal Construct Grp Co Ltd, Wuhan 430023, Peoples R China 3.Ningbo Univ Technol, Soft Soil Res Ctr, State Key Lab Geomech & Geotech Engn, Ningbo 315211, Peoples R China 4.Chinese Acad Sci, Inst Rock & Soil Mech, Hubei Key Lab GeoEnvironm Engn, Wuhan 430071, Peoples R China 5.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 6.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Huang, Juehao,Chen, Jian,Ke, Wenhui,et al. Post-cyclic mechanical behaviors of laterite clay with different cyclic confining pressures and degrees of reconsolidation[J]. SOIL DYNAMICS AND EARTHQUAKE ENGINEERING,2021,151:11.
APA	Huang, Juehao,Chen, Jian,Ke, Wenhui,Zhong, Yu,Lu, Yuan,&Yi, Shun.(2021).Post-cyclic mechanical behaviors of laterite clay with different cyclic confining pressures and degrees of reconsolidation.SOIL DYNAMICS AND EARTHQUAKE ENGINEERING,151,11.
MLA	Huang, Juehao,et al."Post-cyclic mechanical behaviors of laterite clay with different cyclic confining pressures and degrees of reconsolidation".SOIL DYNAMICS AND EARTHQUAKE ENGINEERING 151(2021):11.