泸溪新县城地质灾害发育特征及地质背景解读

Growth Characteristics of Geo-disasters and Its Geological Background in Luxi New County Town

新城镇的建设由于选址时论证不足导致后续发生连锁的地质环境问题,为了科学的分析新城建设与地质灾害的关系,为今后类似建设项目提供警示与借鉴。本文依据最新的详细调查数据,对沅水中游泸溪新县城地质灾害发育特征与地质背景进行了分析,结果显示,沅麻盆地复杂的地质背景导致新城地质灾害易发和多样,脆弱的地质环境条件是新城地质灾害易发的基础,新城下伏地层岩溶发育,使得地面塌陷与地面沉降的发生机率较大,大大制约了城市发展潜力,今后应布设专业监测,进一步科学论证,为城市规划提供基础依据。

The new towns’ construction will lead to many geological environmental issues if it is not enough to demonstrate. This paper attempts to provide some experiences and warnings about new towns’ construction and geological disasters based on their relationship. By the recent data from detailed survey, this paper mainly studies the growth characteristics of geo-disasters and its geological background in Luxi New County Town, located in the middle reaches of the Yuanjiang River. The following conclusions are obtained： （1） the geo-disasters’ susceptibility and variety are caused mainly by complicated geological conditions of Yuanma basin, which will lead to the weak geologic environment, and form the geo-disasters in the new town; （2） A developed karst from the lower strata probably increases the risk of surface collapse and subsidence, which will restrict the development of new town in future; （3）In other town planning, new techniques should play an important role in hazards monitoring, which will provide some experiences for other towns＇ scientifc construction.