IMHE OpenIR  > 管理与支撑系统
Alternative TitleThe Mechanical Property of Gravel Soil in Seismic Area and Its Critical State in Initiating Debris Flow
廖丽萍1,2,3; 朱颖彦4; 杨志全5; 杨云川1,2,3; 胡进6; 邹代华7; 罗晓宏8
Corresponding Author朱颖彦
Source Publication山地学报
Other Abstract



Although gravel soils generated by seismic shaking in Wenchuan earthquake area have subjected to natural consolidation process for nearly ten years,geological hazards,such as slope failures with ensuing debris flows,frequently are haunting the area. To understand the nature of geohazard initiation,in this paper,artificial flume experiments and triaxial tests were used to make close observation on gravel soil samples,which were collected at Niujuan valley,Yingxiu Town of Wenchuan County,Sichuan Province,China. Based on the mechanical property analysis of gravel soil samples,some results relevant to the micro-macro property,action of coarse-fine particles content on dry density,and critical state of gravel soils in the process of motivating debris flow were confirmed: ( 1) The timing and patterns of debris flow initiations were closely related to their initial dry densities,and initiation processes were accompanied with a variation of dry density and void ratio; ( 2 ) Fine particle migration in soil and coarse-fine particle content rearrangement contributed to the internal micro structure
reorganization,which was supposed to be the main reason for variation of dry density and void ratio; ( 3) Gravel soils with unchanged grain compositions,if under the same hydrostatic compression,they approached to an identical critical void ratio theshold to fail; ( 4) The mechanical state of certain sort of gravel soil can be identified by its relative position between state parameter ( e,p') and ec - p' planar critical state line; ( 5) Gravel soil slope failed and then evolved into debris flow under lasting rainfall leaching,while in gravel slope there co-existed soil dilatation and contraction,but the dilatation was dominant. Above research findings not only could be used to interpret debris flow initiation but also would provide an insight for debris flow warning forecast of gravel slope in seismic area.

Keyword汶川震区 砾石土 泥石流 临界状态 力学性状
Subject AreaP642.23
Indexed ByCSCD ; 北大中文核心
Funding Organization国家自然科学基金项目(41071058、41402272、51609041) ; 广西科技厅基金(2015 GXNSFBA139222) ; 广西防灾减灾与工程安全重点实验室项目(2016 ZDX09)
Citation statistics
Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
7.Department of Civiland Resource Engineering,Dalhousie University
Recommended Citation
GB/T 7714
廖丽萍,朱颖彦,杨志全,等. 震区砾石土泥石流起动临界状态与力学性状[J]. 山地学报,2017,35(4):506-516.
APA 廖丽萍.,朱颖彦.,杨志全.,杨云川.,胡进.,...&罗晓宏.(2017).震区砾石土泥石流起动临界状态与力学性状.山地学报,35(4),506-516.
MLA 廖丽萍,et al."震区砾石土泥石流起动临界状态与力学性状".山地学报 35.4(2017):506-516.
Files in This Item:
File Name/Size DocType Version Access License
10-震区砾石土泥石流起动临界状态与力学(2757KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[廖丽萍]'s Articles
[朱颖彦]'s Articles
[杨志全]'s Articles
Baidu academic
Similar articles in Baidu academic
[廖丽萍]'s Articles
[朱颖彦]'s Articles
[杨志全]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[廖丽萍]'s Articles
[朱颖彦]'s Articles
[杨志全]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 10-震区砾石土泥石流起动临界状态与力学性状_廖丽萍.pdf
Format: Adobe PDF
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.