三维激光扫描测量在汶川地震后都汶公路快速抢通中的应用

都（江堰）汶（川）公路是一条高等级山区公路，同时是连接都江堰与汶川县城的主要干道，溯岷江而北上，全长108km。强烈的汶川地震导致了公路两侧大量崩塌、滑坡等地质灾害发生，严重阻断了交通生命线，由于公路沿线河谷狭窄、山高坡陡、表部岩石破碎，又适逢雨季来临，崩塌、滑坡、泥石流等次生地质灾害为震后抢险救灾及地质调查工作带来极大挑战。本文通过三维激光扫描测量技术在都汶公路快速抢通中的应用，讨论其在抢险救灾快速反应中与传统地质调查方法相结合的适用性与可行性，从中不难看出该项技术具有精度高、速度快、真实反映原型并能快速提取相关信息，其势必成为传统地质调查方法的有益补充。

APPLICATION OF 3D LASER SCANNER IN MAKING DUWEN ROAD TRAVELABLE IN SHORT TERM AFTER WENCHUAN EARTHQUAKE

The Du-Wen highway is a highway of high level standards in Western Sichuan mountainous areas to the Jiu Zaigou National Park.Also,it is the trunk road linking Dujingyan City and Wenchuan county town.The Du-Wen highway follows the Minjing river to the north and its length is 108 km.The road was totally destroyed by a great number of geohazards such as rock collapses and landslides during the Wenchuan Earthquake.The river valleys are very narrow and have high steep slopes with loose and cracked mountainous geomaterials.Considering the importance of the road to the rescue of disasters and reconstruction of the destroyed areas after the earthquake,it must be repaired in a very short period of time.This was a big challenge because there were so many landsides and the rain season was coming.Therefore,3D-scanning technique was used to help the landform survey and slope stability evaluation.This paper analyzes the applicability and feasibility of the 3D laser scanning survey on this occasion and discusses the approach combined with traditional survey methods.The practices show that it had the characters of high precision,fast operation and high efficient.I It solved many difficult problems during the quickly repairing period 3 months.A general procedure is put forward to apply this technique to quick slope survey and investigation on urgent occasions.