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蟠桃宫滑坡位于贵阳市东山南坡 ,其南边紧接蟠桃宫立交桥 ,西靠外环东路 ,东侧为一采石场。该滑坡东西长约 70 m,南北宽近 6 0 m,坡度为 4 0°,其平面形状接近正方形 ,总面积近5 0 0 0 m2 ,属岩溶地区的一个小型顺层岩质滑坡。地质上 ,组成该滑坡体的岩层为三叠系下统安顺组的一套浅灰色厚层状白云岩和紫红色薄层至中厚层状含铁质白云岩和泥页岩互层 ;构造上 ,蟠桃宫滑坡为贵阳向斜东冀和东山断层南盘。整个滑体为一倾向南西的单斜构造。蟠桃宫滑坡的形成原因主要是人为修筑机场路开挖边坡 ,产生临空面 ,然后由于降水下渗进入滑体内部 ,尤其是经过后缘的一较大溶蚀裂隙渗透至泥页岩层使之软化成软弱夹层即泥化夹层 ,进而使其抗剪强度下降 ,导致整个滑坡体出现失稳而滑动 ,并引起山坡上许多民房地面及墙面开裂。根据地面地质调查 ,滑坡前缘及后缘等均形成纵向和横向的拉张裂隙。无疑 ,若不及时治理 ,一旦山体失稳滑动将会对人民生命及财产造成巨大的损失。本文主要涉及的问题包括对蟠桃宫滑坡产生滑动原因和力学机理的探讨 ,对其评价和治理方法的优选 ,以及治理后对滑坡的变形观测和评估等。该滑坡体的稳定性分析 ,主要是通过在现场地质和水文地质条件调查的基础上 ,对滑动带内的三个软弱夹层 (即可能的?
Peach Palace landslide is located in the south slope of Dongshan, Guiyang City, south of it immediately peach Palace overpass, west of the outer ring Road, east of a quarry. Its east-west length is about 70 m, its north-south width is 60 m, its slope is 40 °, and its plane shape is close to a square with a total area of nearly 50,000 km2. It is a small cis-rock landslide in the karst area. Geologically, the rocks that form the landslide body are interbedded layers of light gray thick layered dolomite and fuchsin thin to medium thick iron-bearing dolomite and shale in the Lower Triassic Anshun Formation. On the Pan-peach Palace landslide Guiyang syncline Dongji fault and the South plate. The slippery body is a monoclinic structure inclined to the southwest. The main reason for the formation of Pingtungu landslide is the artificial excavation of the airport road slope, resulting in a temporary empty surface, and then infiltrated into the slippery body due to rainfall infiltration, in particular, through a large erosion crevice at the trailing edge to permeate the muddy shale layer Softening into a weak interlayer that is muddy interlayer, thereby reducing the shear strength, resulting in the entire landslide instability and sliding, and caused many residential houses on the hillside walls and walls cracking. According to the ground geological survey, the landslide leading edge and trailing edge are formed longitudinal and transverse tension cracks. Undoubtedly, if not managed in time, once the mountain slips, it will cause tremendous loss to people’s life and property. The main problems involved in this paper are the reasons for the slip and the mechanical mechanism of the landslide in Pingtungu, the optimization of its evaluation and treatment methods, and the observation and assessment of landslide deformation after the treatment. The stability analysis of the landslide body is mainly based on the investigation of the geological and hydrogeological conditions in the field, and analyzes the three weak intercalations in the sliding belt (ie, possible?