Micromechanical analysis of pipeline-soil interaction in unsaturated granular soil undergoing lateral ground movement

doi:10.1016/j.compgeo.2024.106181

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Micromechanical analysis of pipeline-soil interaction in unsaturated granular soil undergoing lateral ground movement
	Peng, Yu 3; Yin, Zhen-Yu 3; Gao, Fu -Ping 1,2
刊名	COMPUTERS AND GEOTECHNICS
	2024-05-01
卷号	169 页码:18
关键词	Micromechanics Granular soils Pipeline -soil interaction Discrete element method Finite element method Progressive failure
ISSN号	0266-352X
DOI	10.1016/j.compgeo.2024.106181
通讯作者	Yin, Zhen-Yu(zhenyu.yin@polyu.edu.hk)
英文摘要	The micro- to macro-scale pipeline-soil interaction mechanism in unsaturated granular soil remains unclear. This study investigates the unsaturated suction effect on the pipeline-soil interaction undergoing lateral ground movement using coupled discrete element method and finite element method (DEM-FEM) simulations. The Johnson-Kendall-Roberts (JKR) adhesive model was used to simulate the interparticle suction while the pipe segment was simulated with finite element meshes. The findings reveal that discontinuity and large deformation occurrences in unsaturated sandy soil in model tests can be successfully modelled by the DEM-FEM method. Besides, the interparticle suction effects on contact forces, particle collision behaviours, and special soil pressure distributions near the pipeline-soil interfaces were discovered and successfully explained. Additionally, progressive soil deformation and failure behaviours in dry and unsaturated soils were compared while the partial similarity between the suction effect and buried depth effect on pipeline-soil interaction was discussed. Finally, several conclusive pipeline-soil interaction failure patterns in different interparticle-suction conditions were identified after analysing a series of particle-scale behaviours including particle trajectories, particle contacts, and particle rotation distributions. The study indicated that neglecting the unsaturated effect can result in severely underestimating the intensity of pipeline-soil interaction and misjudging the soil failure patterns.
资助项目	Research Grants Council (RGC) of Hong Kong Special Administrative Region Government (HKSARG) of China[N_PolyU534/20] ; National Natural Science Foundation of China[12061160463]
WOS关键词	CONSTITUTIVE MODEL ; BURIED PIPELINES ; DEM ; CALIBRATION ; BEHAVIOR ; DISPLACEMENT ; SIMULATION ; FORCE ; PARAMETERS ; RESISTANCE
WOS研究方向	Computer Science ; Engineering ; Geology
语种	英语
WOS记录号	WOS:001194042100001
资助机构	Research Grants Council (RGC) of Hong Kong Special Administrative Region Government (HKSARG) of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/94890]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
通讯作者	Yin, Zhen-Yu
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China 3.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Peng, Yu,Yin, Zhen-Yu,Gao, Fu -Ping. Micromechanical analysis of pipeline-soil interaction in unsaturated granular soil undergoing lateral ground movement[J]. COMPUTERS AND GEOTECHNICS,2024,169:18.
APA	Peng, Yu,Yin, Zhen-Yu,&Gao, Fu -Ping.(2024).Micromechanical analysis of pipeline-soil interaction in unsaturated granular soil undergoing lateral ground movement.COMPUTERS AND GEOTECHNICS,169,18.
MLA	Peng, Yu,et al."Micromechanical analysis of pipeline-soil interaction in unsaturated granular soil undergoing lateral ground movement".COMPUTERS AND GEOTECHNICS 169(2024):18.