CAJ | 학술논문

2013年7月10日四川省都江堰市中兴镇三溪村五里坡因持续大暴雨引发高位滑坡，滑坡呈现高差大、滑速快、滑距长、方量大、伤亡多等特点。野外观察发现，滑坡整体形态为倒“J”状，根据滑坡的滑动和堆积特征，可分为上部滑源区、中部滑流区和下部堆积区。滑坡区上部出露白垩系灌口组红色粉砂岩与泥岩互层，下部为块状砾岩，岩体结构为顺向坡。分析认为：地形陡峭、岩体破碎、地震作用等脆弱的地质环境和人类工程活动、持续强降雨等因素共同引发了本次特大型地质灾害，滑坡发生前48 h的544 mm累计降雨是滑坡发生的直接原因。在致灾模式上，主要呈现地震拉裂→基岩崩滑→加载失稳→滑流推碾→堆积停流的模式。
2013년7월10일사천성도강언시중흥진삼계촌오리파인지속대폭우인발고위활파，활파정현고차대、활속쾌、활거장、방량대、상망다등특점。야외관찰발현，활파정체형태위도“J”상，근거활파적활동화퇴적특정，가분위상부활원구、중부활류구화하부퇴적구。활파구상부출로백성계관구조홍색분사암여니암호층，하부위괴상력암，암체결구위순향파。분석인위：지형두초、암체파쇄、지진작용등취약적지질배경화인류공정활동、지속강강우등인소공동인발료본차특대형지질재해，활파발생전48 h적544 mm루계강우시활파발생적직접원인。재치재모식상，주요정현지진랍렬→기암붕활→가재실은→활류추년→퇴적정류적모식。
The persistent heavy rain triggered Wulipo landslides in Sanxi Village,Dujiangyan,Sichuan Pro-vince in July 10,2013.The features of landslide include big difference of elevation,fast speed of sliding,long run-out distance,large volume,heavy casualties and so on.Landslide overall shows an inverted “J”shape;and it can be divided into the upper slide source region,central slipstream and lower accumulation area.The upper stratum of landslide is Cretaceous Guankou Formation red siltstone and mudstone;the lower is massive conglomerate including mudstone weak surface;the landslide's ramp structure is forward slope.Fragile geolog-ical environment including terrain steep ness,rock crushing,earthquake,with human engineering activities and continued heavy rainfall together,led to the major geological disasters;continuous 48 h of 544 mm rainfall is the direct cause of Wulipo landslide.The disaster mode is earthquake crack→bedrock collapse and slide→loading and instability→slipstream and pushing→accumulation and stopped-flow.