不確定信息處理方法在邊坡穩(wěn)定性分析中的應(yīng)用
[Abstract]:Slope stability analysis is always an important research content in geotechnical engineering safety. Up to now, slope stability analysis methods are mainly divided into two categories: one is the limit equilibrium method based on safety factor and has a large number of engineering applications; The other is the numerical analysis method to simulate the internal mechanical analysis of large slope by using the powerful computing power of computer. However, these methods still have many shortcomings: the limit equilibrium method can not take into account the random uncertainty of the objective geotechnical parameters in reality, which leads to the neglect of these uncertainties. The slope with the same safety factor has a wide slope instability probability, and the numerical analysis method often has convergence problem because of the geometric nonlinear iteration, and there are many controversies on the judging basis of slope instability. In view of the inaccuracy of some problems existing in these traditional methods, such as the uncertainty of parameters or models, this paper looks for some effective methods to deal with these problems from the uncertain information processing methods. The main achievements of this paper are as follows: (1) at first, various classical slope stability methods and several common uncertain information processing are reviewed. The model framework of slope analysis and the corresponding uncertain theoretical tools for slope treatment are extracted from the model. It lays a foundation for further research and application. (2) in view of the shortcomings of the traditional Swedish circular arc method in taking the minimum value of safety factor of multiple landslide surfaces, the uncertainty of geotechnical parameters is expressed on the basis of random sets. By combining the safety factors of multiple landslide surfaces with the Dempster combination rule, a more accurate result is obtained. (3) the traditional method can not quantitatively analyze the slope stability under heavy rainfall. In this paper, the stochastic function relationship between slope stability and rainfall duration is established based on uncertainty theory, and the result is transformed into probability distribution by using transferable reliability model. A new analysis result is obtained. (4) the typical slope engineering of Xiaolangdi Reservoir of the Yellow River is sampled on the spot, the indoor and outdoor research model is established, and the uncertain information method is used to analyze it. The effectiveness of this method in practical slope engineering is verified by experiments.
【學(xué)位授予單位】:杭州電子科技大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:TU43
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 孫敏;;邊坡穩(wěn)定分析中瑞典條分法的改進(jìn)[J];吉林大學(xué)學(xué)報(地球科學(xué)版);2007年S1期
2 朱本珍,周岳華,朱大勇,周早生;對Janbu普遍條分法計算方法的改進(jìn)[J];防災(zāi)減災(zāi)工程學(xué)報;2003年04期
3 徐曉濱;文成林;劉榮利;;基于隨機(jī)集理論的多源信息統(tǒng)一表示與建模方法[J];電子學(xué)報;2008年06期
4 林衛(wèi)烈,楊舜成;滑坡與降雨量相關(guān)性研究[J];福建水土保持;2003年01期
5 束善治,章林;復(fù)雜條件下露天采場邊坡變形分析[J];工程地質(zhì)學(xué)報;2000年02期
6 削丞民;;用摩根斯坦—普賴斯法分析滑坡體的穩(wěn)定性[J];工程勘察;1989年01期
7 周小平,周瑞忠;無單元法研究現(xiàn)狀及展望[J];工程力學(xué);2005年01期
8 吳恒;城市地質(zhì)環(huán)境的工程地質(zhì)分析與圖系編繪[J];桂林冶金地質(zhì)學(xué)院學(xué)報;1993年03期
9 袁聞;徐青;陳勝宏;鄔愛清;;邊坡穩(wěn)定分析的三維極限平衡法及工程應(yīng)用[J];長江科學(xué)院院報;2013年04期
10 陳林杰;鄭曉衛(wèi);;基于有限元強(qiáng)度折減法的地震區(qū)三維邊坡穩(wěn)定性分析[J];重慶交通大學(xué)學(xué)報(自然科學(xué)版);2013年03期
相關(guān)博士學(xué)位論文 前4條
1 謝桂華;巖土參數(shù)隨機(jī)性分析與邊坡穩(wěn)定可靠度研究[D];中南大學(xué);2009年
2 徐曉濱;不確定性信息處理的隨機(jī)集方法及在系統(tǒng)可靠性評估與故障診斷中的應(yīng)用[D];上海海事大學(xué);2009年
3 龐煜;基于可能性理論和格論的系統(tǒng)可靠性分析[D];電子科技大學(xué);2013年
4 ;勰;基于不確定性理論的河流環(huán)境風(fēng)險模型及其預(yù)警指標(biāo)體系[D];湖南大學(xué);2012年
本文編號:2130781
本文鏈接:http://sikaile.net/kejilunwen/diqiudizhi/2130781.html