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岩质边坡智能化位移反分析及工程应用 【作者】杜太亮 【导师】张永兴

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岩质边坡智能化位移反分析及工程应用水利论文SD3LRl

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作者】杜太亮 【导师】张永兴水利论文 ~8}m'].m'T?y5k
【作者基本信息】重庆大学,岩土工程,2006年,博士水利论文\-j M.Psf

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o N0P7Na7g%Y0【中文摘要】 采用传统的岩石力学理论分析计算岩石边坡的开挖变形时,发现计算的边坡位移量远小于实际的边坡位移量。“力学参数给不准”是影响预测岩质边坡位移的主要原因之一。反分析法是利用现有的边坡体实际位移观测值,通过建立一定的反分析计算模型,确立一定的目标函数,不断地优化以寻找目标函数的全局最小值,最小目标函数对应的岩土力学参数即为岩土体的等效力学参数。位移反分析研究从20世纪70年代末开始提出,至今仅30多年,但由于其解决问题的独特性,倍受重视,很快成了解决岩土工程问题的有力工具。本文在利用人工神经网络方法和遗传算法进行了岩质边坡位移反分析的基础上,提出了一种免疫遗传-神经网络反分析方法。主要所做的工作如下:①利用数值分析方法,研究岩石边坡岩体的基本物理力学性质、边坡的几何特征、岩体的结构面参数等对岩质边坡位移的影响,以确定影响岩石边坡位移的主要的物理、力学、几何及结构面因素,为位移反分析的因素选择提供依据。②将先进的试验设计方法-均匀设计法引入到岩石边坡变形的计算和分析中,将容许域内的计算参数值(输入变量)进行数值仿真试验,对每一方案进行有限元模拟计算得出对应的目标值(边坡位移),以快速地掌握边坡位...更多移变化规律,并以此构建样本库作为位移反分析的训练样本。③研究人工神经网络来预测边坡特征点位移以替代数值仿真。④研究人工神经网络、遗传算法、免疫遗传神经网络等智能方法解决岩质边坡位移反分析问题,并比较各种方法的优缺点。⑤岩质边坡智能化位移反分析法在工程中的应用——考虑岩体结构面的位移反分析。以某一具体工程为基础,将免疫遗传-神经网络位移反分析方法应用于存在结构面的岩质边坡位移反分析中。  还原

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xMY_lD0【英文摘要】 The rock slope displacement that is calculated using classical rock mechanical theory is much smaller than the actual displacement. One of the main reasons which make prediction of rock slope displacement incorrect is that mechanical parameters can not be acquired correctly. Back analysis is a method that can acquire the rock mechanical parameters. First, a deduction calculating model and an objective function are established. Then find the global minimum value of the objective function by using optimization methods. The mechanical parameters correspond with function which have the minimum value are the equivalent rock mechanical parameters. The displacement back analysis method was put forward in 70s of 20 century and has been developed over thirty years. At present the method becomes the powerful analysis tool to solve the problems of geotechnical engineering because of its uniqueness. It is much more emphasized by scholars and engineers. Based on back analysis of rock slope displace...更多ment by using artificial neural network and genetic algorithm, another back analysis method which combined with immunization, genetic algorithm and artificial neural network is put forward. In this dissertation the main original work includes:①Effects of rock mass basic mechanical parameters, physical parameters, slope geometric feature and structure surface parameters on rock slope deformation are studied through numerical analysis. Therefore, the main factors which influent rock slopes displacement significantly are acquired. These factors are the basis of displacement back analysis.②Rock slope deformation is calculated and the features of slope deformation are discussed. Using uniform testing design, the numerical simulations of rock slope deformation are implemented with varies parameters by finite element method. The change character of rock slope displacement is studied. Meanwhile, training samples are made that can be used in displacement back analysis method.③Us an artificial neural network that substitute for numerical simulation to predict displacements of slope’s character points.④The artificial intelligent methods such as artificial neural network, genetic algorithm, immunization genetic ANN are discussed to solve the problem of rock displacement back analysis. Merits and drawbacks are generalized comparing with these methods.  还原

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【中文关键词】 岩质边坡; 位移; 数值模拟; 位移反分析; 人工神经网络; 遗传算法; 免疫算法水利论文~9E(q-Ip7P5G
【英文关键词】 Rock slope; Displacement; Displacement back analysis; Artificial neural network; Genetic algorithm; Immunization algorithm

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TAG: 边坡 工程 应用 位移 智能化
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