本文關(guān)鍵詞： 抗滑樁 受力 變形 數(shù)值模擬 PLAXIS 穩(wěn)定性　出處：《重慶交通大學》2014年碩士論文　論文類型：學位論文

【摘要】：我國地形復雜，地質(zhì)條件多樣，因而在道路、鐵道等工程領(lǐng)域，我們要面對很多的路基及邊坡相關(guān)的問題，，而這里面我們最主要面對的是邊坡的穩(wěn)定與治理等工程實際問題。 ○1在邊坡問題的設(shè)計階段，一般都是通過地質(zhì)勘查，來了解坡體的基本情況，然后基于強度理論設(shè)計來分析坡體的穩(wěn)定性，通過計算來設(shè)置抗滑樁，對邊坡進行治理。但是設(shè)置抗滑樁以后，在工程運行中，邊坡的穩(wěn)定性由于各種因素可能會不斷的變化，甚至可能再次失穩(wěn)。因此要對邊坡進行監(jiān)測，通過監(jiān)測來評價穩(wěn)定性，而強度理論沒有考慮變形，由監(jiān)測得到的變形數(shù)據(jù)沒辦法通過強度理論來進行穩(wěn)定性分析，只能采用變形理論，但是通過變形數(shù)據(jù)來評價邊坡的穩(wěn)定性相關(guān)成果還不成熟，沒辦法采用，所以本文進行這方面的研究。 ○2由于自然界邊坡的形態(tài)、支擋結(jié)構(gòu)的類型非常復雜，考慮到普適性的問題，所以本文只針對抗滑樁加固土質(zhì)高邊坡為例，對不同參數(shù)下坡體進行模擬，來分析樁的變形和坡體穩(wěn)定性的關(guān)系，為工程中通過監(jiān)測抗滑樁的變形來考慮坡體穩(wěn)定性提供相關(guān)方法。 本文以典型的土質(zhì)高邊坡為研究對象，主要研究內(nèi)容有以下幾個方面： 1）以工程實例為基礎(chǔ)，利用PLAXIS有限元軟件，以軟件中的PHI-C折減計算方法對抗滑樁加固土質(zhì)高邊坡進行穩(wěn)定性分析。 2)采用數(shù)值模擬方法分析抗滑樁受力與變形。 3)分別考慮坡高、內(nèi)摩擦角、粘聚力等參數(shù)的變化，對各種參數(shù)下的模型進行模擬分析，得出抗滑樁的變形及安全系數(shù)等相關(guān)數(shù)據(jù)，在此基礎(chǔ)上研究抗滑樁變形與邊坡穩(wěn)定性之間的關(guān)系。 4)考慮土體蠕變情形下對坡高、內(nèi)摩擦角、粘聚力等不同的參數(shù)模型進行分析，得出抗滑樁的變形及安全系數(shù)等相關(guān)數(shù)據(jù)，在此基礎(chǔ)上研究抗滑樁變形與邊坡穩(wěn)定性之間的關(guān)系；對比分析PLAXIS中彈塑性模型和蠕變模型中的邊坡抗滑樁變形。 本文研究取得的主要成果對以后邊坡工程中穩(wěn)定性分析及為工程中通過監(jiān)測抗滑樁的變形來考慮坡體穩(wěn)定性提供相應(yīng)方法。
[Abstract]:Because of the complex terrain and various geological conditions in China, we have to face a lot of roadbed and slope related problems in the engineering fields such as roads, railways and so on. And here we are faced with the slope stability and governance and other engineering practical problems. In the design stage of slope problem, the basic situation of slope body is generally understood through geological survey, and then the stability of slope body is analyzed based on strength theory design, and the anti-slide pile is set up by calculation. But after setting the anti-slide pile, the slope stability may change continuously because of various factors, and even may be unstable again. Therefore, the slope should be monitored. The stability is evaluated by monitoring, but deformation is not considered in strength theory. The deformation data obtained from monitoring can not be analyzed by strength theory, but only by deformation theory. However, it is not mature to evaluate slope stability by deformation data. 02 because of the natural slope shape, the type of retaining structure is very complex, considering the problem of universality, so this paper only for the anti-slide pile reinforcement of high soil slope as an example, the different parameters of the slope body simulation. To analyze the relationship between pile deformation and slope stability, and to provide a relevant method for considering slope stability by monitoring the deformation of anti-slide pile in engineering. In this paper, the typical high soil slope as the research object, the main research contents are as follows: 1) on the basis of engineering example, the stability analysis of high soil slope strengthened by slide pile is carried out by using PLAXIS finite element software and PHI-C reduction calculation method in the software. 2) numerical simulation method is used to analyze the force and deformation of anti-slide pile. 3) considering the variation of slope height, internal friction angle, cohesion and other parameters, the model under various parameters is simulated and analyzed, and relevant data such as deformation and safety factor of anti-slide pile are obtained. On this basis, the relationship between deformation of anti-slide pile and slope stability is studied. 4) under the condition of soil creep, the paper analyzes the different parameter models such as slope height, internal friction angle, cohesion and so on, and obtains the deformation and safety factor of anti-slide pile and other relevant data. On this basis, the relationship between deformation of anti-slide pile and slope stability is studied. The deformation of slope anti-slide pile in elastic-plastic model and creep model in PLAXIS is compared and analyzed. The main results obtained in this paper provide a method to analyze the stability of slope in the future and to consider the stability of slope by monitoring the deformation of anti-slide pile.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U416.14;U213.13

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本文編號：1451615