宁强县地质灾害危险评价的研究.pdf

摘要近年来,随着经济的飞速发展和人类活动的增加,我国地质灾害发生频繁且种类繁多,地质灾害所造成的直接经济损失每年高达270亿元。地质灾害成为制约经济和社会发展、影响生态环境的重要因素。为此地质灾害详细调查工作及对地质灾害稳定性分析的研究显得日益重要。 2008年汶川地震,对陕西省西南部地区影响很大,特别是汉中、宝鸡等市因地震引发的次生地质灾害严重,出现了大量的灾情、险情,对当地人民群众生命和财产构成了严重威胁。为了保障地震灾区人民生命财产安全和灾后恢复重建工作的顺利进行,陕西省国土资源厅组织开展地震灾区地质灾害详细调查工作。本文结合此次调查工作在对宁强县地质灾害详细调查及室内试验等工作的基础上, 划分了地质灾害类型;总结了地质灾害的发育特征及分布规律;分析了地质灾害形成条件和影响因素。;+ 通过对调查资料的整理、统计可知:宁强县地质灾害共分为四种类型,滑坡、崩塌和泥石流和地面塌陷。野外共调查地质灾害点396处,其中滑坡332处,%;崩塌49处,%;泥石流11处,%;地面塌陷4处,%。使用Geostudio软件对典型滑坡点进行了模拟计算和稳定性评价。本研究成果对于宁强县地质灾害防治规划、治理具有重要的指导作用。关键词:地质灾害,滑坡,崩塌,发育特征,分布规律,宁强县 ABSTRACT Inrecent years,with therapid economic development andincreased human activities, frequent geological disastersinChinaand awiderange ofgeological disasterscaused direct economic losses ofup to 27 billionyuan disastersas a constraint to economic and socialdevelopment,and environment animportant detailed investigation ofgeological disastersand thestabilityanalysis ofgeological e increasinglyimportant. WenChuan earthquake in2008 year,made Shaanxi Province,southwest ofgreatinfluence, especially inHanzhong,Baoji City,the earthquake caused severe secondary geological disasters,there hasbeen alotofdisaster,danger,the localpeople’S livesand property, constitute a serious order to protect lives and property of people in earthquake-stricken areasand disasterrecovery and reconstructionwork toproceed smoothly, Shaanxi Provincial Department anizations inearthquake disaster detailed investigation. Inthispaper,the investigation ofgeological disastersinthecounty rather on thebasisof detailedinvestigation,by thetype ofgeological hazards;summarizes thecharacteristicsof geological hazards and thedistributionofdevelopment;analysis ofdisaster formation conditionsandinfluencing factors. Through thecollationofsurvey data,statistics shows that:NingQiang County isdivided intofourtypes ofgeological hazards,landslides,avalanches and landslidesand ground totaloffieldpoint 396 geological