甘肃天水市北山地质灾害类型及成因分析

Geo-hazard types and causes analysis in Tianshuishi Beishan

本文在深入分析天水市北山地质灾害发育现状的基础上,通过野外调查、实验数据和已有成果资料综合分析的方法,系统研究了天水市北山地质灾害的主要类型及成因。通过对研究区地质灾害的形成机制分析和探讨,揭示了该地区地质灾害发育的物质基础、力学性质、自然因素和人为因素,可为进一步治理该区的各类地质灾害提供理论指导,同时对预测研究区未来地质灾害发生、发展具有积极的指导作用和实际意义。研究区突发性地质灾害的类型主要有滑坡、崩塌、不稳定斜坡、地面塌陷和泥石流沟等五种类型,其地质灾害主要分布在北山的阳坡,形成了数条滑坡群沟。滑坡类型以混合式、中层、小型黄土滑坡为主;崩塌类型以人为黄土崩塌为主;不稳定斜坡主要属黄土型,主要位于滑坡或阶地前缘以及人类居住区;地面塌陷主要分布在滑坡体上;泥石流沟灾害,按物质组成属于泥流沟,按流域形态属于山坡型,按流体性质属于稀性,按水动力条件属于暴雨型。

Based on in-depth analysis of the Tianshui mountain geological hazards, through the methods of field investigation, experimental data and analysis the results of data, system research the main types of geological disasters and its causes in Tianshui Beishan. Based on the study of geological hazards genesis mechanism analysis and discussion, for further processing of the area of all kinds of geological disasters and provide theoretical guidance and the prediction of future occurrence of the study area geological disasters has a positive role in guiding and practical significance. Tianshuishi sudden geological disaster types have mainly landslide, collapses, unstable slopes, ground subsidence and debris flow five types, the geological disaster mainly distributed in the sunny slope in Beishan Tianshuishi,formed a number of landslide group ditch. Landslide types to hybrid, middle and small loess landslides primarily;The type of collapse to give priority to the person loess collapses. The main type of unstable slopes is loess, located mainly in the landslide or terraces front and human residential area. The ground subsidence mainly distributed in the landslide. Debris flow disaster, according to the material component belong to mud flow channel, according to the valley belong to hillside type form according to the fluid property belongs to dilutesex,according to the hydrodynamic conditions belong to heavy rains type.