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Intelligent Algorithm for Evaluating Rock/Soil Slope Stability and Reliability

Author: ZhuJianFeng
Tutor: ChenChangFu
School: Hunan University
Course: Geotechnical Engineering
Keywords: Slope Stability Reliability Genetic Algorithms Tabu Search Response surface Hoek-Brown criterion
CLC: TU43
Type: Master's thesis
Year: 2007
Downloads: 474
Quote: 10
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Abstract


Slope stability analysis Geotechnical Mechanics and Engineering of several of the most important theoretical and practical issues, is one of the earliest attempts to classical soil mechanics theory has not yet been satisfactorily resolved and solved. Firstly, the adaptive genetic algorithm (AGA) and Tabu Search Algorithm (TS algorithm) proposed by combining a new type of intelligent optimization algorithm - adaptive genetic tabu search algorithm (AGA-TS algorithm); and from the safety factor value analysis and probabilistic reliability analysis on two aspects, systematic exposition AGA-TS algorithm slopes and jointed rock slope stability analysis of the application; Finally, three-dimensional slope some reliability issues discussed. This paper studies the results are as follows: (1) analysis of simple genetic algorithm (SGA) deficiencies, AGA and TS algorithm elaborated the basic principles and calculation processes. The AGA and TS algorithm combined and based on two different optimization strategies were established adaptive genetic variation tabu search (AGA-TSM) algorithm and adaptive genetic tabu local search (AGA-TRS) algorithm (which belong to the AGA-TS algorithm ). Simulation results show that the improved two optimization algorithms than the simple adaptive genetic algorithm and tabu search algorithm has better global search performance. (2) proposed a Hoek-Brown criterion empirical parameters m, s improved value method-IBDRMP (Improved Blasting Damaged Rock Mechanical Parameters) method, and use IBDRMP method based on Hoek-Brown criterion for jointed rock slope stability analysis Methods to improve; then use the AGA-TS algorithm searches for soil slope and jointed rock slope most dangerous slip surface and the corresponding minimum safety factor. A large number of examples show that, compared with other algorithms, AGA-TS algorithm for better search results. (3) using the slope limit equilibrium analysis (including slopes and jointed rock slope simplified Bishop method, Morgenstern-Price method and their modified form) to replace the traditional response surface method, finite element method, the establishment of a new edge Response surface slope reliability index calculation methods; and minimum reliability index as the objective function, based on AGA-TS algorithm can simultaneously determine the slope to establish a minimum reliability index and the corresponding most dangerous slip surface of arbitrary shape global optimization algorithm, and reveals the value based on the minimum safety factor in the reliability index lower and lower minimum critical slip surface is not identity. (4) The expansion of two-dimensional Morgenstern-Price method, an improved three-dimensional safety factor calculation method - dimensional Morgenstern-Price method; and response surface function construction, the use of the improved method finite element method to replace the previous sampling, the establishment of A new three-dimensional response surface slope reliability index calculation methods. Finally, we discuss the value of width w sliding body and Soil Index (C,?) Distribution probability model and correlation of three-dimensional slope safety factor and reliability index calculation results.

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CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Soil Mechanics
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