CAJ | 학술논문

2013年7月10日上午10时30分左右，四川省都江堰市中兴镇三溪村五里坡发生大规模山体滑坡。约264×104m3的山体在前期降雨的影响下启动，在短短2min内将滑坡体下方约500m处的11户农家乐吞噬，造成44人死亡，117人失踪，大量农户房屋受损。本文采用三期遥感数据源，分别对滑坡发生前的孕灾环境条件、滑坡早期变形特征及滑后发育特征等内容进行解译；同时结合无人机航空摄影、地形测绘及地面调查手段，对滑坡发育的地层岩性、结构面产状、节理发育情况等内容进行现场验证；在此基础上对滑坡成因机制及运动破坏模式进行分析。结果表明，五里坡滑坡是在较好的临空条件和结构面的有效组合条件下，受强降雨条件激发形成的灾害。在持续强降雨作用下，与母岩分割开来的滑动块体，在动水压力作用下，沿底层滑面向临空方向滑动。在越过前缘约36m高的陡坎后，运动方式转变为崩滑运动，滑坡体经瞬间加速并撞击碎裂化，形成高速运动的滑坡碎屑流。在此过程中，中途伴随着洪水汇入，滑坡碎屑流又进一步转化为泥石流，最终形成滑坡－碎屑流－泥石流的链式成灾模式。其运动和破坏模式较为典型，值得深入研究。
2013년7월10일상오10시30분좌우，사천성도강언시중흥진삼계촌오리파발생대규모산체활파。약264×104m3적산체재전기강우적영향하계동，재단단2min내장활파체하방약500m처적11호농가악탄서，조성44인사망，117인실종，대량농호방옥수손。본문채용삼기요감수거원，분별대활파발생전적잉재배경조건、활파조기변형특정급활후발육특정등내용진행해역；동시결합무인궤항공섭영、지형측회급지면조사수단，대활파발육적지층암성、결구면산상、절리발육정황등내용진행현장험증；재차기출상대활파성인궤제급운동파배모식진행분석。결과표명，오리파활파시재교호적림공조건화결구면적유효조합조건하，수강강우조건격발형성적재해。재지속강강우작용하，여모암분할개래적활동괴체，재동수압력작용하，연저층활면향림공방향활동。재월과전연약36m고적두감후，운동방식전변위붕활운동，활파체경순간가속병당격쇄열화，형성고속운동적활파쇄설류。재차과정중，중도반수착홍수회입，활파쇄설류우진일보전화위니석류，최종형성활파－쇄설류－니석류적련식성재모식。기운동화파배모식교위전형，치득심입연구。
At 1 0:30 AM on July 1 0,201 3,a large-scale landslide occurred at Wulipo Sanxi Village,Zhongxing Town of Dujiangyan City in Sichuan province.The rock mass of about 264×1 04m3 rushed down and destroyed 1 1 village houses that are 500m beneath the landslide rock mass in 2minutes,killed 44 people and buried 1 1 7 people, as well as damaged many rural houses.This paper interprets the environment conditions and the deformation characteristics at pre-landsliding and the characteristics at post-landsliding,using 3-stage remote sensing images. Meanwhile,the lithology,attitude of rocks and cracks of the landslide are surveyed utilizing UAV images, geomorphological mapping and field investigation.Based on these results, this paper analyzes the formation mechanism and failure mode of Wulipo landslide.Results show that under effective combination of good freeing conditions and structural surface,Wulipo landslide is triggered by heavy precipitation.By the effect of continuous heavy precipitation,the sliding rock mass is separated from the bed rock,slides towards freeing direction along the sliding surface under the pressure of dynamic water.After crossing the 36-meter high scarp at the front edge,the movement mode of the landslide becomes landslip-collapse movement.The landslide mass is accelerated instantly and breaks into pieces,and forms high speed debris flow.In this process,the floods transfer the landslide-debris flow further into mud-rock flow and cause the chain disaster of landslide-debris flow-mud rock flow.The movement and damage mode of the landslide are typical and deserve further research.