“5·12”汶川地震崩塌滑坡危险性评价—— 以都汶公路沿线为例

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Abstract Dujiangyan—Wenchuan highway，the serious quake-hit area，was selected as the investigative object to assess the risks of collapses and landslides caused by “5·12” Wenchuan earthquake along the highway，and the sensitivities of collapses and landslides to their impact factors were analyzed by the method of information acquisition analysis. Then，based on remote sense image interpretation and field investigation data，the risks of these geo-hazards were assessed by GIS. The results show that collapses and landslides easily occurr under the following natural conditions：(1) slope gradient：＞35°；(2) slope aspect：east，southeast and south；(3) surface roughness：＞1.15；(4) the distance to the main fault：5–20 km；(5) land use type：forest，woodland and shrub forest；(6) stratum and lithology：proterozoic diorite，plagiogranite，basalt and andesite，carboniferous limestone and marl and Silurian gray green phyllite and limestone，especially the proterozoic basalt and andesite. The hazard assessment results were given in terms of overlaying the information value of each factor，and then the assessment results were divided into five grades：high intense risk zone，higher risk zone，moderate zone，light risk zone and no risk zone. It is found that the moderate，higher and high intense risk zones account for 70.34% of the study area，the high intense risk zone accounts for 19.15%，and no risk zone only accounts for 11.81%. The high intense and higher risk zones mainly distribute in the areas from Yingxiu to Caopo River and the light risk zone and below light risk zones mostly locate in the section of Caopo River—Wenchuan. The presented results provide a scientific basis for the prevention，elusion and mitigation of geo-hazards and support the recovery and reconstruction of Dujiangyan—Wenchuan highway.

Key words： slope engineering；“5·12&rdquo Wenchuan earthquake；collapses and landslides；Dujiangyan—Wenchuan highway；information acquisition analysis；risk assessment

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	Articles by authors
	ZHUANG Jianqi1
	2
	CUI Peng1
	GE Yonggang1
	ZHU Yingyan1
	LIU Yinghui3
	PEI Laizheng1
	2

Cite this article:

ZHUANG Jianqi1,2,CUI Peng1, et al. RISK ASSESSMENT OF COLLAPSES AND LANDSLIDES CAUSED BY 5.12 WENCHUAN EARTHQUAKE—A CASE STUDY OF DUJIANGYAN—WENCHUAN HIGHWAY[J]. , 2010, 29(S2): 3735-3742.

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https://rockmech.whrsm.ac.cn/EN/Y2010/V29/IS2/3735

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