[1]屈永平,唐川,王金亮,等.强震区泥石流启动机制[J].山地学报,2012,(03):336.
 QU Yongping,TANG Chuan,WUANG Jingliang,et al.Debris Flow Initiation Mechanisms in Strong Earthquake Area[J].Mountain Research,2012,(03):336.
点击复制

强震区泥石流启动机制()
分享到:

《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2012年03期
页码:
336
栏目:
山地学报
出版日期:
2012-01-01

文章信息/Info

Title:
Debris Flow Initiation Mechanisms in Strong Earthquake Area
作者:
屈永平;唐川;王金亮;唐宏旭;刘洋;陈海龙;黄伟;
成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川 成都 610059
Author(s):
QU YongpingTANG ChuanWUANG JingliangTANG hongxuLIU YangCHENG HailongHUANG Wei
State Key Laboratory for Geo-Hazard Prevention and Geo-Environment Protection,Chengdu University of Technology,Chengdu 610059,China
关键词:
泥石流滑坡堆积体岩土特性地表径流启动机制
Keywords:
debris flowlandslide depositsgeotechnical propertyrainfall effectsinitiation mechanism
分类号:
P642.23
文献标志码:
A
摘要:
地震区的泥石流物源主要来源于滑坡、崩塌等松散体,具有结构疏松,密实度低,堆积时间短等特点,与非地震环境中的滑坡、崩塌堆积体的结构有所不同,堆积体的物理力学性质发生了改变,堆积体转换为泥石流所需的外界条件也相应的改变。以汶川地震区都江堰市龙池镇典型泥石流灾害为例,分析了地震滑坡、崩塌松散体的堆积形态和堆积体的应力环境。从静力学和动力学角度分析堆积体在强降雨条件下的起动特征,探讨了降雨作用形成的地表径流水深与堆积体失稳时的应力极限状态的关系。分析得出沟道岸坡滑坡堆积体发生侵蚀时的地表径流力为F=(τ1f-f1sinα)/cos(α-26.65),并建立径流水深与地表径流力的关系:H=F/4ρsgJ...
Abstract:
Sediment supply for debris flow occurrence in the seismic zone mainly derived from loose deposits of seismic landslides and rockfalls. Normally the sediment supply in debris flow basin has some features such as loose structure,low density,and quick accumulation. It is much different from that in nonseismic zone. Due to change of physical property in the landslide deposits,it results in relevant change of external conditions for landslide debris transmitting in to debris flows. This paper analyzed depositional morphology and the stress environment of loose accumulation of the seismic landslides based on debris flow investigation in a study area of Longchi Town,Dujianyang City that located in the Wenchuan earthquake area. Debris flow initiation mechanism under the condition of rainstorm is discussed in a basis of an analysis of statics and danamics. The relationship between the runoff water depth and the ultimate stress state during landslide deposit failure in saturated condition was showed in the formula as following:F=(τ1f-f1sinα)/cos(α-26.65). And The relationship between the runoff water depth and surface runoff capacity was established as the formula:H=F4ρsgJ。Under the conditions of the conservation of mechanical energy,erosive volume model with an unit time of landslide deposit failure was established as the formula:dV=dM/γs。In order to apply the proposed model in actual situation,a study area in Shuida debris flow gully of Dujiangyang city of the Wenchuan earthquake area was selected. Result indicated that surface runoff depth when debris flow initiated reached 0.011 m,which is consistent with the result of field survey.

相似文献/References:

[1]蒋志林,朱静,常鸣,等.汶川地震区红椿沟泥石流形成物源量动态演化特征[J].山地学报,2014,(01):81.
 JIANG Zhilin,ZHU Jing,CHANG Ming,et al.Dynamic Evolution Characteristics of Hongchun Gully Source Area of Debris Flow in Wenchuan Earthquake Region[J].Mountain Research,2014,(03):81.
[2]常鸣,唐川,蒋志林,等.强震区都江堰市龙池镇泥石流物源的遥感动态演变[J].山地学报,2014,(01):89.
 CHANG Ming,TANG Chuan,JIANG Zhilin,et al.Dynamic Evolution Process of Sediment Supply for Debris Flow Occurrence in Longchi of Dujiangyan,Wenchuan Earthquake Area[J].Mountain Research,2014,(03):89.
[3]王 钧,欧国强,杨 顺,等.地貌信息熵在地震后泥石流危险性评价中的应用[J].山地学报,2013,(01):83.
 WANG Jun,OU Guoqiang,YANG Shun,et al.Applicability of Geomorphic Information Entropy in the Postearthquake Debris Flow Risk Assessment[J].Mountain Research,2013,(03):83.
[4]王东坡,何思明,葛胜锦,等.“9?07”彝良地震诱发次生山地灾害调查及减灾建议[J].山地学报,2013,(01):101.
 WANG Dongpo,HE Siming,GE Shengjin,et al.Mountain Hazards Induced by the Earthquake of Sep 07,2012 in Yiliang and the Suggestions of Disaster Reduction[J].Mountain Research,2013,(03):101.
[5]喻 武,万 丹,汪书丽,等.藏东南泥石流沉积区植物群落结构和物种多样性特征[J].山地学报,2013,(01):120.
 YU Wu,WAN Dan,WANG Shuli,et al.Community Structure and Species Diversity of Debris Flow Deposition Area in Southeast of Tibet,China[J].Mountain Research,2013,(03):120.
[6]崔鹏,陈晓清,张建强,等.“4·20”芦山7.0级地震次生山地灾害活动特征与趋势[J].山地学报,2013,(03):257.
 CUI Peng,CHEN Xiaoqing,ZHANG Jianqiang,et al.Activities and Tendency of Mountain Hazards Induced by the Ms7.0 Lushan Earthquake,April 20,2013[J].Mountain Research,2013,(03):257.
[7]邹强,崔鹏,杨伟,等.G318川藏公路段泥石流危险性评价[J].山地学报,2013,(03):342.
 ZOU Qiang,CUI Peng,YANG Wei.Hazard Assessment of Debris Flows along G318 Sichuan-Tibet Highway[J].Mountain Research,2013,(03):342.
[8]王根龙,张茂省,于国强,等.舟曲2010年“8·8”特大泥石流灾害致灾因素[J].山地学报,2013,(03):349.
 WANG Genlong,ZHANG Maosheng,YU Guoqiang,et al.Factor Analysis for Catastrophic Debris Flows on August 8,2010 in Zhouqu City of Gansu,China[J].Mountain Research,2013,(03):349.
[9]陈源井,余斌,朱渊,等.地震后泥石流临界雨量变化特征——以汶川地震区小岗剑沟为例[J].山地学报,2013,(03):356.
 CHEN Yuanjing,YU Bin,ZHU Yuan,et al.Characteristics of Critical Rainfall of Debris Flow after Earthquake——A Case Study of the Xiaogangjian Gully[J].Mountain Research,2013,(03):356.
[10]游勇,柳金峰,陈兴长,等.芦山“4·20”地震后宝兴县城打水沟泥石流发育趋势及防治方案[J].山地学报,2013,(04):495.
 YOU Yong,LIU Jinfeng,CHEN Xingzhang.The Potential Tendency and Mitigation Measures of Dashui Gully in Baoxing Coutny after Lushan“4?20”Earthquake of Schuan[J].Mountain Research,2013,(03):495.

备注/Memo

备注/Memo:
收稿日期(Received date):2012-02-24;改回日期(Accepted) : 2012-04-10。
基金项目(Foundation item):国家973计划(2011CB409903)和国家科技支撑计划课题(2011BAK12B01)。\[the National Basic Research Program of China (973 Program)(2011CB409903),National Science Technology Support Program(2011BAK12B01).\]
作者简介(Biography):屈永平 ( 1984-) ,男 ,汉族 ,四川成都人,研究生,主要从事地质灾害及城市灾害研究。\[Qu Yongping,male,born in Chenggdu,Sichuan in 1984,graduate student,work mainly on geological disasters and urban disasters,State Key Laboratory of Geo-Hazard Prevention and Geo-Environment Protection,Chengdu University of Technology,610059 Chengdu,China.\]E-mail:qyp1232006@126.com;Tel:15828257340
更新日期/Last Update: 1900-01-01