GIS技术支持下基于遗传算法的边坡稳定性分析评价系统

【作者】 吴银龙；

【导师】 张勤；

【作者基本信息】 长安大学 ， 地图制图学与地理信息工程， 2005， 硕士

【摘要】 边坡一般是指具有倾斜坡面的土体或岩体,它是人类工程活动中最基本的地质环境之一,边坡失稳造成的灾害是全球性的一种重大灾害,常常给人类的生命和财产带来不可估量的损失。一个边坡的失稳往往是多种因素共同作用的结果,因此,长期以来人们一直在研究探索,力图找到更科学更合理的分析和评价方法。 经过长期的努力,人们在边坡稳定分析方面已经取得很大成就,有了很多成熟的模型和方法。本论文是作者在总结前人经验、借鉴现有方法,针对目前边坡稳定性分析中存在的数据资料繁多、各种资料不能有机结合、计算的结果不够合理的问题,以土质边坡为主要对象,在研究边坡稳定性分析理论和地理信息系统开发技术理论的基础上,采用VB高级编程语言开发了一个边坡稳定性分析评价系统。 在该系统中,作者引进了具有极大空间数据管理功能的GIS技术,使用GIS二次开发控件MapX,建立内部空间数据库,把图形数据和文本数据有机整合在一起,使系统具有很强大的空间功能,能很方便地对各种数据进行空间操作和动态管理。在边坡稳定性分析的数学模型的建立上,作者采用的是一种传统的极限平衡法—瑞典圆弧法,作为主要分析模型,然后模仿生物进化过程,采用遗传算法,以滑弧圆心的横、纵坐标和半径为搜索变量对模型进行优化,得到一种能够在全局范围内搜索出边坡最危险滑动面,并能克服局部收敛计算出最小安全系数的边坡稳定性分析评价方法。最后以工程算例验证了该方法的合理性和科学性,达到了满意的效果。整个系统以软件工程的思想为指导,采用模块化方法进行开发,系统界面友好、设计合理,除了具有各种专业分析功能外还具备一般系统的通用功能,并且有可扩充性,这使得本系统在实际的边坡稳定分析工作中有一定的实用价值。更多还原

【Abstract】 Slope is the soil body or the sock bodies with tilted dome, it’s a kind of fundamental geologic environment in mankind engineering activity , Slope destabilization is globality fatal catastrophe, it usually brings disestimated loss to mankind life and property . A slope destabilization is usually the result of multi-factor’s combined action. So the people have long studied analysis and evaluation of slope stability for a long time, tried to find more scientific and rational analysis and evaluation methods.People have obtained greatly achievement in slope stability analysis, generated many mature models and methods through the longly hard wok, But there are some problems such as information is very complex、 various data can’t combine organically and the calculation result is unreasonable in slope stability analysis. So the author generalizes predecessors’ experience and uses the existing methods for reference, using a computer language named VB to make out a slope stability analysis evaluation system main for the soil slope based on studying the theory of the slope stability analysis and the technology exploitation of Geographical Information System(GIS).The author introduced GIS technology which has maximal special data management function, established the inner special database by using the GIS secondary exploitation com named MapX, combined graphical data with text data organically, so the system has powerful special functions and proceed various special operation and dynamical management. On the establishment of mathematical model of slope stability analysis, the theory adopted conventional limit equilibrium method -Swedish circle method(Fellenus) as the main analysis model, then simulates organic evolution process, optimizes model with the horizontal、 vertical ordinate and radius of slip circle center as search variable based on genetic algorithm, accordingly obtained a kind of slope stability analysis evaluation method that can search the most dangerous sliding surface of slope in global ranger and calculate minimum safety coefficients based on local convergence. At last, this paper verifies rationality andscientificity of the method by engineering example, obtained satisfied effecto The whole system adopts the modularization method to develop by the software engineering <> System interface is amicability and design is rational, and it has some general functions of the general system and expandability except professional analysis function o It makes the system has some definite using value on the stability analysis of slope in facto更多还原