明冲, 马显春, 肖洋, 文绍强. 2016: 古蔺县二郎中渡滑坡地质特征与成因机制分析. 工程地质学报, 24(s1): 1127-1132. DOI: 10.13544/j.cnki.jeg.2016.s1.162
    引用本文: 明冲, 马显春, 肖洋, 文绍强. 2016: 古蔺县二郎中渡滑坡地质特征与成因机制分析. 工程地质学报, 24(s1): 1127-1132. DOI: 10.13544/j.cnki.jeg.2016.s1.162
    MING Chong, MA Xianchun, XIAO Yang, WEN Shaoqiang. 2016: THE ANALYSIS OF GEOLOGICAL FEATURES AND FORMATION MECHANISM OF ERLANG LANDSLIDE IN GULIN COUNTY. JOURNAL OF ENGINEERING GEOLOGY, 24(s1): 1127-1132. DOI: 10.13544/j.cnki.jeg.2016.s1.162
    Citation: MING Chong, MA Xianchun, XIAO Yang, WEN Shaoqiang. 2016: THE ANALYSIS OF GEOLOGICAL FEATURES AND FORMATION MECHANISM OF ERLANG LANDSLIDE IN GULIN COUNTY. JOURNAL OF ENGINEERING GEOLOGY, 24(s1): 1127-1132. DOI: 10.13544/j.cnki.jeg.2016.s1.162

    古蔺县二郎中渡滑坡地质特征与成因机制分析

    THE ANALYSIS OF GEOLOGICAL FEATURES AND FORMATION MECHANISM OF ERLANG LANDSLIDE IN GULIN COUNTY

    • 摘要: 中渡滑坡是二郎镇发育的滑坡中规模最大、危害最强、治理难度最大的一个,虽经过多次整治,该滑坡局部仍在蠕滑变形。通过现场勘查,首先分析了中渡滑坡区的地质构造、地形地貌、地层岩性、人工活动等特征,进而结合区域地质构造,详细分析了该滑坡的成因机制。中渡滑坡为古崩滑堆积体的局部复活。受向家场断裂及赤水河对坡体前缘的侵蚀影响,二郎场镇曾发生一次大规模的滑动,滑坡堆积体堵塞赤水河道。此后,滑坡坝溃决,赤水河主河道右移,并长期冲刷坡体前缘,导致坡体前缘阻滑段减少。此外,从滑坡区左侧通过的沙井断裂倾向南东(即滑坡堆积体方向),倾角75,导水性好,加之坡体上的人工活动,是引发滑坡堆积体局部复活甚至整体滑移的主要因素。

       

      Abstract: Zhongdu landslide was the largest, strongest harm, and most difficulty management in Erlang town. Although after many governance, the landslide was still in the creep deformation. Through the field survey, they were analyzed firstly that the geological structure, landform, stratum lithology, and human activities in the landslide area. And then combined with regional geological structure, cause of the mechanism of the landslide are analyzed in detail. Zhongdu landslide was the ancient landslide collapse and local resurrection. In the ancient, there was a massive landslide in Erlang town caused by the Xiangjiachang fracture and the Chishui river erosion on the front of the slope. And the river was blocked by the landslide deposit. After, the landslide dam was failure, the front edge of the slope was long-term erosion by the river, and lead to the resistance sliding section of the slope reduced. In addition, Shajing fracture was hydraulic conductivity, and the tendency to the deposit landslide, dip Angle of 75.And the human activities on the slope were frequent. These were the main factors which caused the landslide sliding.

       

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