GIS在滑坡稳定性评价中的应用——以汉源县二蛮山为例
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摘要
采用野外调查与室内实验相结合的方法,以四川汉源县二蛮山作为研究对象,通过对滑坡发生的环境条件、发育特征和机理进行分析,选取了滑坡体特征、地质构造、高程、坡向、坡度、地震、降雨等因素作为研究分析变量,将GIS与模糊数学评价方法相结合,开发滑坡稳定性评价插件,对研究区域进行危险性区划,尽量避免易发生地质灾害的区域,减小人员伤亡和财产损失。研究结果表明,滑坡的发生区域主要集中在高程1600 m左右、坡度30°—50°地段,随着高度和坡度的增大,发生滑坡的可能性也逐渐增加。
In this paper,the method of theoretical knowledge,field surveys and laboratory experiments were used to analyze the environmental conditions,development characteristics and mechanism of the Ermanshan landslide in Hanyuan County,selecting the characters of landslide,geological structure,elevation,aspect,slope,earthquake,rainfall and other factors as analysis variables.We combine GIS with fuzzy mathematical evaluation method,develop the landslide stability evaluation plug-in,and then divide the risk regionalization of study area,in order to avoid occurrence of geological hazards in the area,reduce casualties and property losses.The results show that the landslide areas are mainly concentrated on the elevation at about 1600 m and 30° to 50° slope area.With the increase of height and slope,the possibility of landslides is raised.
In this paper,the method of theoretical knowledge,field surveys and laboratory experiments were used to analyze the environmental conditions,development characteristics and mechanism of the Ermanshan landslide in Hanyuan County,selecting the characters of landslide,geological structure,elevation,aspect,slope,earthquake,rainfall and other factors as analysis variables.We combine GIS with fuzzy mathematical evaluation method,develop the landslide stability evaluation plug-in,and then divide the risk regionalization of study area,in order to avoid occurrence of geological hazards in the area,reduce casualties and property losses.The results show that the landslide areas are mainly concentrated on the elevation at about 1600 m and 30° to 50° slope area.With the increase of height and slope,the possibility of landslides is raised.
引文
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[11]牛彦博.汉源二蛮山高速滑坡启程阶段孔隙水压力效应分析[J].工程地质学报,2013,21(1):70～75.NIU Yan-bo.Effect of pore water pressure on set-out range of high speed landslide of Ermanshan in Hanyuan City[J].Journal of Engineering Geology,2013,21(1):70～75.
[12]许强,董秀军,邓茂林,等.2010年7.27四川汉源二蛮山滑坡-碎屑流特征与成因机理研究[J].工程地质学报,2010,18(5):610～622.XU Qiang,DONG Xiu-jun,DENG Mao-lin,et al.The Ermanshan rock slide debris flow of July 27,2010 in Hanyuan,Sichuan:Characteristics and failure mechanism[J].Journal of Engineering Geology,2010,18(5):610～622.
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[14]陶骞,刘超,朱志铭,等.多工况下汉源二蛮山滑坡机理数值模拟[J].地质力学学报,2012,18(4):440～450.TAO Qian,LIU Chao,ZHU Zhi-ming,et al.Numerical simulation of landslide mechanism at Ermanshan in Hanyuan underdifferent conditions[J].Journal of Geomechanics,2012,18(4):440～450.
[2]王振强.重大滑坡阶段演绎稳定性分析与综合安全度[D].重庆:重庆交通大学,2010:1～80.Wang Zhenqiang.The interpretation of a major landslide stage stability analysis and integrated safety[D].Chongqing:Chongqing Jiao tong University,2010:1～80.
[3]汪华斌,吴树仁.滑坡灾害风险评价的关键理论与技术方法[J].地质通报,2008,27(11):1764～1770.WANG Hua-bin,WU Shu-ren.Key theory and method of landslide hazard risk assessments[J].Geological Bulletin ofChina,2008,27(11):1764～1770.
[4]许冲,戴福初.基于ArcGIS的边坡稳定性评价系统研究[J].工程地质计算机应用,2008,49(1):23～27.XU Chong,DAI Fu-chu.Study on the slope stability evaluation system based on ArcGIS[J].Engineering Geology andComputer Application,2008,49(1):23～27.
[5]王磊,张春山,杨为民,等.基于GIS的甘肃省甘谷县地质灾害危险性评价[J].地质力学学报,2011,17(4):388～401.WANG Lei,ZHANG Chun-shan,YANG Wei-min,et al.Risk assessment of geohazards by using GIS in Gangu County,Gansu Province[J].Journal of Geomechanics,2011,17(4):388～401.
[6]楚敬龙,杜加强,滕彦国,等.基于GIS的重庆市万州区滑坡灾害危险性评价[J].地质通报,2008,27(11):1875～1881.CHU Jing-long,DU Jia-qiang,TENG Yan-guo,et al.Landslide hazard evaluation for Wanzhou District,Chongqing City,China using GIS[J].Geological Bulletin of China,2008,27(11):1875～1881.
[7]陶志刚,孙忠强,郭占飞,等.耦合多种成灾因素下的边坡稳定性分析[J].地下空间与工程学报,2011,7(3):593～598.TAO Zhi-gang,SUN Zhong-qiang,GUO Zhan-fei,et al.Slope stability analysis under the condition of coupling multiplefactors causing the landslide[J].Chinese Journal of Underground Space and Engineering,2011,7(3):593～598.
[8]黄润秋,王运生,董秀军.2009年8.6四川汉源猴子岩崩滑的现场应急调查及危岩处理[J].工程地质学报,2009,17(4):445～448.HUANG Run-qiu,WANG Yun-sheng,DONG Xiu-jun.The 6thAugust 2009 field urgent investigation on the geohazard ofthe rock fall dammingin Houziyan,Shunhe,Hanyuan,Sichuan[J].Journal of Engineering Geology,2009,17(4):445～448.
[9]Guthrie R H,Evans S G,Catane S G,et al.The 17 February 2006 rock slide-debris avalanche at Guinsaugon Philippines:A synthesis[J].Bulletin of Engineering Geology and the Environment,2009,68(2):201～213.
[10]郭锋,刘钊,邓潇.汉源县万工泥石流抢险中的几点做法[J].水利水电技术,2011,42(9):62～64.GUO Feng,LIU Zhao,DENG Xiao.Rescue of Hanyuan County million workers in the debris flow points of[J].WaterResources and hydropower Engineering,2011,42(9):62～64.
[11]牛彦博.汉源二蛮山高速滑坡启程阶段孔隙水压力效应分析[J].工程地质学报,2013,21(1):70～75.NIU Yan-bo.Effect of pore water pressure on set-out range of high speed landslide of Ermanshan in Hanyuan City[J].Journal of Engineering Geology,2013,21(1):70～75.
[12]许强,董秀军,邓茂林,等.2010年7.27四川汉源二蛮山滑坡-碎屑流特征与成因机理研究[J].工程地质学报,2010,18(5):610～622.XU Qiang,DONG Xiu-jun,DENG Mao-lin,et al.The Ermanshan rock slide debris flow of July 27,2010 in Hanyuan,Sichuan:Characteristics and failure mechanism[J].Journal of Engineering Geology,2010,18(5):610～622.
[13]杜继隐.降雨型地质灾害预报预警——以黄土高原和秦巴山区为例[M].北京:科学出版社,2010.DU Ji-yin.Rainfall-triggered geologic disaster forecast and warning:Taking loess plateau and Qinba mountain areas asexamples[M].Beijing:Science Press,2010.
[14]陶骞,刘超,朱志铭,等.多工况下汉源二蛮山滑坡机理数值模拟[J].地质力学学报,2012,18(4):440～450.TAO Qian,LIU Chao,ZHU Zhi-ming,et al.Numerical simulation of landslide mechanism at Ermanshan in Hanyuan underdifferent conditions[J].Journal of Geomechanics,2012,18(4):440～450.
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