CAJ | 학술논문

结合灾后应急勘察,通过大比例尺工程地质测绘及钻探等手段对维城乡后山堆积体结构进行了系统调查,认为后山堆积体为一古滑坡.滑坡形成前为一变质砂岩和千枚岩构成的顺向坡且顺坡面走向陡倾长大结构面发育,峡谷期河流的快速下蚀作用使斜坡前缘形成陡立临空面,重力作用下,坡体后缘顺层滑移拉裂并最终整体滑动形成古滑坡,运用理正软件搜索古滑坡潜在不稳定滑面,并对其稳定性进行计算和评价,认为其局部复活但整体处于稳定状态.
결합재후응급감찰,통과대비례척공정지질측회급찬탐등수단대유성향후산퇴적체결구진행료계통조사,인위후산퇴적체위일고활파.활파형성전위일변질사암화천매암구성적순향파차순파면주향두경장대결구면발육,협곡기하류적쾌속하식작용사사파전연형성두립림공면,중력작용하,파체후연순층활이랍렬병최종정체활동형성고활파,운용리정연건수색고활파잠재불은정활면,병대기은정성진행계산화평개,인위기국부복활단정체처우은정상태.
Based on emergency exploration after Wenchuan earthquake,by large-scale engineering geological mapping and drilling, the authors systematically investigated the accumulation body of Houshan in Weicheng township, held that the accumulation body was an ancient landslide.The convex left bank in Weicheng used to be a consequent slope composed of metasandstone and phyllite before ancient landslide forming,under the role of the rapid river erosion in deep valley stage,the front part of the slope was cut into a steeply free face,under the slope gravity,posterior edge of slope rupture and bedding slip,finally an ancient landslide happened.In this paper, Lizheng software was used to search for potential instability slip surface in the ancient landslide,calculation and evaluation on its stability show that the ancient landslide is active partly, but whole slope is stable.