【作者】 赵亮；

【导师】 文海家；

【作者基本信息】 重庆大学 ， 岩土工程， 2009， 硕士

【摘要】 岩土工程风险问题在山区工程建设与运营中日益凸现。论文以典型的山地城市――奉节新城为研究对象,结合前人的研究成果,通过对现场高边坡灾害状况的调查,在基础数据收集、整理的基础上,基于岩土工程风险分析的基本理论,利用地理信息系统(GIS)技术、GPS技术、神经网络方法等进行分析研究,构建一套山地城市高边坡灾害区域风险管理系统。主要研究工作内容如下:①在对奉节新城区地质环境与高边坡灾害现状实地调查的基础上,较深入地分析了奉节新城区高边坡的变形破坏机理和灾害的影响因素。②在对奉节新城区高边坡的变形破坏机理和灾害的影响因素分析的基础上,基于岩土风险分析的基本理论模型与方法,探讨了适合对山地城市高边坡灾害进行区域风险评价的风险评估模型,并分析了采用GIS技术实现风险分析的可行性。③构建了奉节新城高边坡灾害危险性区划评价指标体系,并通过层次分析法研究了各种评价因子对高边坡灾变贡献的权重。在此基础上,通过GIS栅格数据专题图层的叠加运算,对奉节新城高边坡进行了危险性区划分析。④基于现场调查,构建了奉节新城区人口、房屋及附属财产和道路及附属财产等三个高边坡灾害影响的易损性评价指标,采用GIS栅格数据专题图层的叠加运算,对奉节新城高边坡灾害影响进行易损性分析。⑤基于③和④的研究,采用前述山地城市高边坡灾害区域风险评价模型,通过图片叠加与重分类等方法,在GIS平台上,实现了奉节新城高边坡灾害的风险区划。⑥针对高风险区的典型边坡-王家坪滑坡,通过GPS位移监控技术、结合神经网络方法,对王家坪滑坡的稳定现状及后期变形进行了预测,进一步研究高风险边坡灾变的可能性,为风险管理决策部门提供决策依据。⑦通过以上研究,以奉节新城为研究对象,构建了一个山地城市高边坡区域风险管理的系统框架。更多还原

【Abstract】 The risk of geotechnical engineering construction is becoming increasingly apparent in mountainous construction. This paper, with a typical mountainous city---Fengjie County---as the research subject, combined with previous research ac hievements, by investigating the situation of on-site high-slope disaster, based on the basic theories of risk analysis in geotechnical engineering, and by means of such research methods as geographic information systems (GIS) technology, GPS technology, as well as neural network analysis method, builds, on the basis of data collection and collation, a set of risk management system in areas suffering from high-slope disasters in mountainous cities. The main contents of the paper are presented below:①To make a relatively further analysis of the factors that exert influence on the mechanism of high-slope deformation and destruction and the occurrence of disasters in New City of Fengjie County, on the basis of making a on-site survey of the current situation of the geological environment and high-slope disasters.②To explore, based on the basic model and method of geotechnical risk analysis, a risk assessment model fit for assessing the regional risk of high-slope disasters in mountainous cities and analyze the feasibility of using GIS technology to achieve risk analysis, after discussing the factors imposing influence on the mechanism of high-slope deformation and destruction and the occurrence of disasters in New City of Fengjie County.③To set up an evaluation index system for high-slope disaster zoning in New City of Fengjie county, to study the weight of various assessing factors’contribution to high-slope disasters, and on this basis, to make a risk zoning analysis of the high slopes in New City of Fengjie County.④To build three vulnerability assessment indicators for the population, housing and ancillary assets, roads and ancillary assets, based on investigating on the spot; to conduct a vulnerability analysis of the impact of high-slope disaster in New City of Fengjie County, by using overlapping computing of GIS raster data layers.⑤To achieve, in GIS platform, a high-slope disaster risk zoning in New City of Fengjie County, by using aforementioned risk assessment model in high-slope risk zoning of mountainous cities and using the method of image superimposed with the re-classification. ⑥For a typical landslide in high risk areas---Wangjiaping Landslide, to predict the stability and post-deformation of landslides in Wangjiaping; to further analyze the possibility of catastrophic slopes; and to provide risk management and decision-making sectors with decision-making criteria, using GPS monitoring technology and combined with neural network method.⑦Based on the above studies, and with New City of Fengjie County as the research subject, to construct a systematic framework for the regional risk management in high-slope areas in mountainous cities.更多还原