Mechanical Response of Granite Residual Soil Subjected to Impact Loading

doi:10.1061/(ASCE)GM.1943-5622.0002055

	Mechanical Response of Granite Residual Soil Subjected to Impact Loading
	Liu, Xinyu 1,2; Zhang, Xianwei 1; Kong, Lingwei 1; Chen, Cheng 1; Wang, Gang 1,2
刊名	INTERNATIONAL JOURNAL OF GEOMECHANICS
	2021-06-01
卷号	21 期号:6 页码:14
关键词	Granite residual soil Impact loading Failure mechanism Structural damage Cementation Hysteresis loop
ISSN号	1532-3641
DOI	10.1061/(ASCE)GM.1943-5622.0002055
英文摘要	When constructing subway tunnels, blasting is commonly used to deal with granite boulders in weathered granite formations. It is, therefore, crucial to evaluate how the blasting-induced impact loading affects surrounding granite residual soil. By means of laboratory impact tests at different conditions, this paper presents the mechanical responses of granite residual soil. High-speed impact loading affects the soil in two ways, namely, (1) increasing the shear resistance; and (2) damaging the soil structure. Cyclic impact tests reveal the critical peak stress A(cr), which approaches soil apparent preconsolidation pressure. When the peak stress exceeds A(cr), the soil is severely damaged and the accumulative deformation increases sharply, indicating that the cementation of soil is destroyed. Besides, the soil is most resistant to impact loading at a threshold value of the loading frequency f(th) and exhibits better resistance under high confining pressures. A framework was proposed that reflects soil structural damage and within which the failure mechanism under impact loading is explained. The damage to the soil structure generated with energy dissipation is the decisive factor in soil failure, and the accumulation of permanent deformation is the direct reason why soil fails. Three response modes were proposed for studied soil under impact loading. This research provides parameters for subway tunnel construction and enhances the understanding of granite residual soil under impact loading.
资助项目	National Natural Science Foundation of China[41972285] ; National Natural Science Foundation of China[41672293] ; National Natural Science Foundation of China[51709290] ; Youth Innovation Promotion Association CAS[2018363] ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection at Chengdu University of Technology[SKLGP2020K024] ; Science Fund for Distinguished Young Scholars of Hubei Province[2020CFA103]
WOS研究方向	Engineering
语种	英语
出版者	ASCE-AMER SOC CIVIL ENGINEERS
WOS记录号	WOS:000672403800028
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/27288]
专题	中科院武汉岩土力学所
通讯作者	Zhang, Xianwei
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, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xinyu,Zhang, Xianwei,Kong, Lingwei,et al. Mechanical Response of Granite Residual Soil Subjected to Impact Loading[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2021,21(6):14.
APA	Liu, Xinyu,Zhang, Xianwei,Kong, Lingwei,Chen, Cheng,&Wang, Gang.(2021).Mechanical Response of Granite Residual Soil Subjected to Impact Loading.INTERNATIONAL JOURNAL OF GEOMECHANICS,21(6),14.
MLA	Liu, Xinyu,et al."Mechanical Response of Granite Residual Soil Subjected to Impact Loading".INTERNATIONAL JOURNAL OF GEOMECHANICS 21.6(2021):14.