[1]段 钊,彭建兵,王启耀.泾阳南塬多序次黄土滑坡特征参数与成因[J].山地学报,2016,(01):71-76.[doi:10.16089/j.cnki.1008-2786.000102]
　DUAN Zhao,PENG Jianbing,WANG Qiyao.Characteristic Parameter and Formation Mechanism of Repeatedly Failure Loess Landslides[J].Mountain Research,2016,(01):71-76.[doi:10.16089/j.cnki.1008-2786.000102]
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泾阳南塬多序次黄土滑坡特征参数与成因()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2016年01期
页码:
71-76
栏目:
山地灾害
出版日期:
2016-02-01

文章信息/Info

Title:
Characteristic Parameter and Formation Mechanism of Repeatedly Failure Loess Landslides
作者:
段 钊1; 2; 彭建兵2; 王启耀3
1.西安科技大学 地质与环境学院，陕西 西安710054； 2.长安大学 地质工程与测绘学院，陕西 西安710054； 3.长安大学 建筑工程学院，陕西 西安710054
Author(s):
DUAN Zhao1; 3; PENG Jianbing2; WANG Qiyao3
1.College of Geology and Environment, Xi′an University of Science and Technology, Xi′an 710054，China； 2.School of Geology Engineering and Geomatics，Chang′an University，Xi′an 710054，China； 3.School of Civil Engineering，Chang′an University，Xi′an 710054，China
关键词:
特征参数; 成因机制; 剪切试验; 黄土滑坡; 泾阳南塬
Keywords:
characteristic parameter;  formation mechanism;  shear test;  loess landslide;  south Jingyang plateau
分类号:
P642.22
DOI:
10.16089/j.cnki.1008-2786.000102
文献标志码:
A
摘要:
泾阳南塬黄土滑坡表现出典型的多序次破坏特征，已造成了严重的土地资源损失及经济林地破坏。以泾阳南塬多序次黄土滑坡为研究对象，根据现场调查结果对黄土滑坡的多序次特征参数进行统计分析发现，随滑动序次的增加，滑坡表现出体积递减、滑距缩短、剪出口升高以及后缘两侧易滑等特征。进一步通过剪切试验及数值仿真实验，对滑坡的多序次成因机制进行了初步探讨，结果表明：灌溉导致地下水位持续上升是研究区黄土滑坡形成的主要原因，其力学机制可概括为土体在排水条件下，因孔压激增引发不完全排水行为，从而发生的静态剪缩破坏；前序次滑坡的形成改变了斜坡原有的结构形态，为后序次滑坡的孕育和发展提供了良好的滑动条件，主要表现在堵水促滑、凸坡促滑以及液化分异三方面影响。
Abstract:
The loess landslides have caused serious land resources loss and economic forest destruction in South Jingyang Plateau of west China with repeatedly failure characteristics. In this paper, taking the repeatedly failure loess landslide as the research object. Through the statistical analysis of the survey results we find that the landslides shows successive characteristics changes with increasing failure order, such as volume reduction, sliding distance shorten, shear outlet rise and easy to slide on the side of slope. Through shear test and numerical simulations，we discussed the formation mechanism of the repeatedly failure loess landslide，the results as follow：The main reason is the rise of ground water level caused by irrigation，its mechanics can be summarized as the static shear failure due to pore water pressure increases suddenly occurred in loess samples under drained conditions; The former landslides changes the structural forms of slope which providing a good sliding conditions for the latter landslides, the influences may be manifested in groundwater congestion, unstable slope form and discrepant sliding mode.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期(Received date)：2015-08-31；改回日期(Accepted)：2015-09-14。 基金项目(Foundation item)：中国地质调查局项目（12120114036001）、西部矿产资源与地质工程教育部重点实验室开放基金项目（310826151137）和西安科技大学博士启动金项目（2014QDJ029）。 [Supported by the China Geological Survey Project (12120114036001), the Open Foundation of Key Laboratory of Western Mineral Resources and Geological Engineering Ministry of MOE (310826151137) and the Start Foundation of Xi'an University of Science and Technology (2014QDJ029).] 作者简介（Biography）：段钊（1985-），男，陕西西安人，博士，讲师，主要从事黄土滑坡机理研究。 [Duan Zhao (1985-), male, lecturer, PH.D, engaged in the mechanism of loess landslides.] E-mail：landsliders@126.com
更新日期/Last Update: 1900-01-01