|Table of Contents|

Geological Environmental Influence of Lushan Ms7.0 Earthquake in Sichuan(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2013年第02期
Page:
92-98
Research Field:
水资源与环境
Publishing date:

Info

Title:
Geological Environmental Influence of Lushan Ms7.0 Earthquake in Sichuan
Author(s):
WANG Yun-sheng;  QUAN Qing;  LUO Yong-hong;  ZHANG Lei;  SHEN Tong
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, Sichuan, China
Keywords:
Lushan earthquake;  geohazard;  geological environmental influence;  avalanche;  slope crack;  liquefaction of sand;  subsidence of roadbed
PACS:
P694
DOI:
-
Abstract:
A Ms7.0 earthquake hitted Lushan county of Ya’an city, Sichuan province on April 20, 2013, and the geological environmental influence of the earthquake was concerned. Based on remote sensing interpretation and field survey, the geological environmental influence of Lushan earthquake was analyzed preliminarily. The main geological environmental influences included that Lushan earthquake induced wide spread secondary avalanche mountainous disasters with small scale, which distributed along the trough valley of Shuangshi-Dachuan fracture zone and the NW gorges cutting structural belts, such as S210 provincial road Lushan-Baoxing gorge, Lushan-Shuangshi gorge and Longmen-Taiping gorge, and the distribution density of avalanche in Baosheng and Taiping towns near the epicenter was largest; the active and stable sources of debris flow were increased by avalanche because of the earthquake; the new sources of avalanche increased in the gullies and gentle slopes, and the probability of gully-shaped and slope debris flows after the earthquake increased; seismic cracking was common in the slopes, and the uneven settlement of slope surface blanket caused by vibration resulted in ground fracturing, building cracking, roadbed failure, etc.; sand liquefaction increased the damage, and the sand liquefaction in trough valley of causative fault caused by vibration resulted in foundation failure above the causative fault; the site effect of thick overburden layer caused the abnormal damage in the river plain which located in the footwall of earthquake, and the amplification effect of earthquake wave in thick overburden layer of footwall foreland basin caused serious collapse and crack, such as the river plain in Longmen and Qingren of Lushan county, Laochang and Renyi of Tianquan county and slope zone; the most serious area of geological environmental influence of Lushan earthquake was Taiping-Baosheng near the epicenter, the more serious area was fault zone footwall 5 km to hanging wall 5 km, urban area of Baoxing county and foreland basin.

References:

[1] 许冲,徐锡伟,吴熙彦,等.2008年汶川地震滑坡详细编目及其空间分布规律分析[J].工程地质学报,2013,21(1):25-44.
[2] 施斌,王宝军,张巍,等.汶川地震次生地质灾害分析与灾后调查[J].高校地质学报,2008,14(3):387-394.
[3] 王运生,罗永红,吉峰,等.汶川大地震山地灾害发育的控制因素分析[J].工程地质学报,2008,16(6):759-763.
[4] 陈宁,王运生,蒋发森,等.汶川县渔子溪地震地质灾害特征及灾害链成生分析[J].工程地质学报,2012,20(3):340-349.
[5] 王绪本,余年,朱迎堂,等.龙门山逆冲构造带大地电磁测深初步成果[J].成都理工大学学报:自然科学版,2008,35(4):398-403.
[6] WANG Y S,HUANG R Q,LUO Y H,et al.The Genetic Mechanism of Wenchuan Earthquake[J].Journal of Mountain Science,2011,8(2):336-344.
[7] 林茂炳,陈运则.龙门山南段双石断裂的特征及地质意义[J].成都理工学院学报,1996,23(2):64-68.
[8] 陶晓风.龙门山南段推覆构造与前陆盆地演化[J].成都理工学院学报,1999,26(1):73-77.
[9] 秦向辉,陈群策,谭成轩,等.龙门山断裂带西南段现今地应力状态与地震危险性分析[J].岩石力学与工程学报,2013,32(增1):2870-2876.
[10] 贾营营,付碧宏,王岩,等.青藏高原东缘龙门山断裂带晚新生代构造地貌生长及水系响应[J].第四纪研究,2010,30(4):825-836.
[11] 崔书红.汶川地震生态环境影响及对策[J].环境保护,2008(13):37-38.
[12] 徐新良,江东,庄大方,等.汶川地震灾害核心区生态环境影响评估[J].生态学报,2008,28(12):5899-5908.
[13] 彭建兵,马润勇,范文,等.汶川大震的科学思考[J].地球科学与环境学报,2009,31(1):1-29.
[14] 四川省测绘地理信息局.“4·20”芦山7.0级地震地理信息发布平台[DB/OL].(2013-04-21)[2013-05-02]. http://www.scgis.net/LSXEarthquake.
[15] WANG Y S,LUO Y H,WANG F H,et al.Slope Seismic Response Monitoring on the Aftershocks of the Wenchuan Earthquake in the Mianzhu Section[J].Journal of Mountain Science,2012,9(4):523-528.
[16] 唐益群,杨奇,周洁.汶川地震对村镇建筑地基破坏模式分析[J].同济大学学报:自然科学版,2013,41(1):39-47,127.

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Last Update: 2013-06-20