【摘要】 天全县处于巨型青藏滇缅印度尼西亚"歹"字型构造体系中部与龙门山北东向构造带结合部位,构造活动强烈。受5.12地震的影响,境内发生了大量的次生地质灾害。滑坡、不稳定斜坡、崩塌、泥石流是区内的主要地质灾害。分析认为:区内的地质灾害在时间上主要发生在2000年,而5.12地震以后更甚;在空间上主要分布在人口密集、人类工程活动强烈的东部地区及318公路一带;暴雨是诱发地质灾害的主要因素;地质灾害的分布受地层岩性、地貌类型、地质构造、植被分布、人类活动的综合影响。根据地质灾害的勘测结果,提出了避险搬迁、生态建设等综合防治建议。更多还原

【Abstract】 The Tianquan County is situated at conjunctive site of the middle part of Qinghai-Tibet-Yunnan-Myanmar-Indonesia η-type structure and the Longmenshan NE tectonic belt,tectonic activities are strong.Because of impact from 5.12 Earthquake,abundant secondary geological hazards happened in the area,most of all are landslides,unstable slopes,collapses and mud-rock flows.Analyses reckoned: geological hazards are mainly happened since the year 2000 and what is more after the 5.12 Earthquake;spatially,mainly in thickly populated area and human engineering activities intense eastern region and No.318 national highway neighborhood;torrential rain is the critical factor to induce geological hazards;and distribution of such hazards is combining influenced by strata lithology,landform,geological structure,vegetation and human activities.As a consequence of geological hazard investigation,integrated controlling suggestions of risk-avoiding relocation,ecological construction etc.put forward.更多还原