2013年四川省芦山“4.20”7.0级强烈地震触发滑坡

doi:10.3969/j.issn.0253-4967.2013.03.018

地震地质 ›› 2013, Vol. 35 ›› Issue (3): 641-660.DOI: 10.3969/j.issn.0253-4967.2013.03.018

• 芦山M_S7.0地震研究专题 • 上一篇下一篇

2013年四川省芦山“4.20”7.0级强烈地震触发滑坡

许冲¹, 徐锡伟¹, 郑文俊², 魏占玉¹, 谭锡斌¹, 韩竹军¹, 李传友¹, 梁明剑³, 李志强¹, 王虎¹, 王明明¹, 任俊杰⁴, 张世民⁴, 何仲太⁴

1. 中国地震局地质研究所, 活动构造与火山重点实验室, 北京 100029;
2. 中国地震局地质研究所, 地震动力学国家重点实验室, 北京 100029;
3. 四川省地震局, 成都 610041;
4. 中国地震局地壳应力研究所, 北京 100085

收稿日期:2013-05-08 修回日期:2013-07-29 出版日期:2013-09-30 发布日期:2013-10-12
作者简介:许冲,男,1982年生,副研究员,研究方向为地震滑坡与活动构造,电话:010-62009084,E-mail:xc11111111@126.com,xuchong@ies.ac.cn。
基金资助:
国家自然科学基金(41202235,91214201)和中国地震局地质研究所基本科研业务专项(IGCEA1215, IGCEA1302)共同资助

LANDSLIDES TRIGGERED BY THE APRIL 20,2013 LUSHAN, SICHUAN PROVINCE M_S 7.0 STRONG EARTHQUAKE OF CHINA

XU Chong¹, XU Xi-wei¹, ZHENG Wen-jun², WEI Zhan-yu¹, TAN Xi-bin¹, HAN Zhu-jun¹, LI Chuan-you¹, LIANG Ming-jian³, LI Zhi-qiang¹, WANG Hu¹, WANG Ming-ming¹, REN Jun-jie⁴, ZHANG Shi-min⁴, HE Zhong-tai⁴

1. Key Laboratory of Active Tectonics and Volcano, Institute of Geology, China Earthquake Administration, Beijing 100029, China;
2. State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China;
3. Earthquake Administration of Sichuan Province, Chengdu 610041, China;
4. Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China

Received:2013-05-08 Revised:2013-07-29 Online:2013-09-30 Published:2013-10-12

摘要/Abstract

摘要：

2013年4月20日,四川省芦山县发生了M_S 7.0地震。文中简要介绍了芦山地震的基本情况与芦山地震区历史地震及其相关地震滑坡情况。依据2008年汶川地震滑坡与地震动峰值加速度(PGA)的空间关系,对芦山地震滑坡大体分布范围进行了推测。根据地震滑坡分类学,将芦山地震滑坡分为破坏型滑坡、连贯型滑坡、流滑型滑坡3大类。其中,破坏型滑坡包括岩质崩塌、岩质滑动、岩质崩滑、土质崩塌、土质滑动等5类; 连贯型滑坡包括土质坍塌与慢土流2类; 流滑型滑坡为快速流滑。破坏型滑坡如岩质崩塌、岩石滑动、土质崩塌这3类是芦山地震滑坡中最常见的类型。基于震后可利用的高分辨率航片,初步解译得到3 883处滑坡位置点数据。最后,从余震对滑坡的影响,芦山地震滑坡与邻区地震滑坡对比分析,对后续基于高分辨率遥感影像的滑坡精细解译的启示等3个方面开展了分析与讨论。

关键词: 芦山M_S7.0地震, 地震滑坡, 应急考察

Abstract:

On April 20,2013,a strong earthquake of M_S 7.0 struck the Lushan County,Sichuan Province of China. In this paper,basic information of the April 20,2013 Lushan earthquake,historical earthquakes in the Lushan earthquake struck area and associated historical earthquake-triggered landslides were introduced firstly. We delineated the probable spatial distribution boundary of landslides triggered by the Lushan earthquake based on correlations between the 2008 Wenchuan earthquake-triggered landslides and associated peak ground acceleration(PGA).According to earthquake-triggered landslides classification principles,landslides triggered by the earthquake are divided into three main categories: disrupted landslides,coherent landslides,and flow landslides. The first main category includes five types: rock falls,disrupted rock slides,rock avalanches,soil falls,and disrupted soil slides. The second main category includes two types of soil slumps and slow earth flows. The type of flow landslides is mainly rapid flow slides. Three disrupted landslides,including rock falls,disrupted rock slides,and soil falls are the most common types of landslides triggered by the earthquake. We preliminary mapped 3883 landslides based on available high-resolution aerial photographs taken soon after the earthquake. In addition,the effect of aftershocks on the landslides,comparisons of landslides triggered by the Lushan earthquake with landslides triggered by other earthquake events,and guidance for subsequent landslides detailed interpretation based on high-resolution remote sensing images were discussed respectively. In conclusion,based on quick field investigations to the Lushan earthquake,the classifications,morphology of source area,motion and accumulation area of many earthquake-triggered landslides were recorded before the landslide might be reconstructed by human factors,aftershocks,and rainfall etc. It has important significance to earthquake-triggered landslide hazard mitigation in earthquake struck area and the scientific research of subsequent landslides related to the Lushan earthquake.

Key words: the M_S 7.0 Lushan earthquake, earthquake triggered landslides, emergency field investigation

中图分类号:

P316

许冲, 徐锡伟, 郑文俊, 魏占玉, 谭锡斌, 韩竹军, 李传友, 梁明剑, 李志强, 王虎, 王明明, 任俊杰, 张世民, 何仲太. 2013年四川省芦山“4.20”7.0级强烈地震触发滑坡[J]. 地震地质, 2013, 35(3): 641-660.

XU Chong, XU Xi-wei, ZHENG Wen-jun, WEI Zhan-yu, TAN Xi-bin, HAN Zhu-jun, LI Chuan-you, LIANG Ming-jian, LI Zhi-qiang, WANG Hu, WANG Ming-ming, REN Jun-jie, ZHANG Shi-min, HE Zhong-tai. LANDSLIDES TRIGGERED BY THE APRIL 20,2013 LUSHAN, SICHUAN PROVINCE M_S 7.0 STRONG EARTHQUAKE OF CHINA[J]. SEISMOLOGY AND GEOLOGY, 2013, 35(3): 641-660.

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2013年四川省芦山“4.20”7.0级强烈地震触发滑坡

LANDSLIDES TRIGGERED BY THE APRIL 20,2013 LUSHAN, SICHUAN PROVINCE M_S 7.0 STRONG EARTHQUAKE OF CHINA

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2013年四川省芦山“4.20”7.0级强烈地震触发滑坡

LANDSLIDES TRIGGERED BY THE APRIL 20,2013 LUSHAN, SICHUAN PROVINCE MS 7.0 STRONG EARTHQUAKE OF CHINA

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LANDSLIDES TRIGGERED BY THE APRIL 20,2013 LUSHAN, SICHUAN PROVINCE M_S 7.0 STRONG EARTHQUAKE OF CHINA