本文關(guān)鍵詞： 錨索預(yù)應(yīng)力失效 穩(wěn)定性分析 巖質(zhì)邊坡 數(shù)值模擬　出處：《重慶交通大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著我國經(jīng)濟(jì)的不斷發(fā)展,各類建設(shè)工程諸如高速公路工程、水利水電工程、鐵路工程、工民建筑工程等建設(shè)中出現(xiàn)的邊坡加固支護(hù)技術(shù)越來越多。預(yù)應(yīng)力錨索就是其中一種廣泛應(yīng)用于邊坡工程的加固技術(shù)。預(yù)應(yīng)力錨索可以充分發(fā)揮巖石的自身承載力,也可以提高巖石的強(qiáng)度和自穩(wěn)能力,從而減輕支護(hù)結(jié)構(gòu)的自重。預(yù)應(yīng)力錨索還具有節(jié)省工程成本、保證工程質(zhì)量、提高施工的安全性的重要作用,具有顯著的社會和經(jīng)濟(jì)效益。但由于施工過程中難免出現(xiàn)的不確定性,能影響預(yù)應(yīng)力出現(xiàn)損失甚至失效的因素很多,在現(xiàn)實工程中,我們經(jīng)常可以發(fā)現(xiàn)各種邊坡失穩(wěn)造成的事故,給國民經(jīng)濟(jì)和人民利益造成了不可挽回的損失。因而,探究預(yù)應(yīng)力錨索在邊坡工程中的作用原理和失效模式具有相當(dāng)普遍的研究價值。在本文中,作者以應(yīng)用研究為出發(fā)點,結(jié)合理論分析和數(shù)值分析兩個方面來針對預(yù)應(yīng)力錨索加固巖質(zhì)邊坡工程研究錨索預(yù)應(yīng)力失效對邊坡穩(wěn)定性的影響,完成的主要工作如下:①根據(jù)預(yù)應(yīng)力錨索在巖質(zhì)邊坡工程中的應(yīng)用類型,作用狀況等分析總結(jié)出預(yù)應(yīng)力錨索加固邊坡的作用原理。②研究了錨索預(yù)應(yīng)力失效破壞的影響因素,同時通過分析一般常用的邊坡穩(wěn)定性分析方法,總結(jié)出了這些方法的優(yōu)缺點和它們的適用范圍。詳細(xì)的介紹了影響邊坡失穩(wěn)的主要因素和破壞形式,并深入研究了單錨、群錨失效對邊坡穩(wěn)定性的影響。③對數(shù)值分析理論進(jìn)行了研究,同時對邊坡失穩(wěn)的屈服準(zhǔn)則和本構(gòu)模型進(jìn)行了選取。④采用數(shù)值分析軟件FLAC3D對錨索加固邊坡時預(yù)應(yīng)力失效的各種不同情況下,邊坡的水平位移、豎直位移、塑性區(qū)的發(fā)展情況進(jìn)行了數(shù)值模擬。最后,本文通過對錨索預(yù)應(yīng)力失效對邊坡穩(wěn)定性影響的研究,得出了邊坡在錨索預(yù)應(yīng)力各種不同失效情況下的變形情況和安全系數(shù)的變化規(guī)律,提出了一些改善錨索預(yù)應(yīng)力失效的相關(guān)措施。
[Abstract]:With the continuous development of our economy, various construction projects such as highway engineering, water conservancy and hydropower projects, railway projects. There are more and more slope reinforcement and support technologies in the construction of engineering, such as workmen and civilian buildings. Prestressed anchor cable is one of the reinforcement techniques widely used in slope engineering. Prestressed anchor cable can give full play to the bearing capacity of rock itself. Force. It can also improve the strength and self-stability of rock, thus reducing the weight of the supporting structure. The prestressed anchor cable can also save the engineering cost, ensure the quality of the project and improve the safety of construction. It has remarkable social and economic benefits. However, due to the uncertainty in the construction process, there are many factors that can affect the loss or even failure of the prestressing force. We can often find all kinds of slope instability caused by accidents, to the national economy and the interests of the people caused irreparable losses. Exploring the action principle and failure mode of prestressed Anchorage cable in slope engineering has very common research value. In this paper, the author takes the application research as the starting point. Combined with theoretical analysis and numerical analysis to study the influence of prestressed cable failure on slope stability in view of pre-stressed anchor cable reinforcement rock slope engineering. The main work accomplished is as follows: 1 according to the application type of prestressed Anchorage cable in rock slope engineering. The action principle of prestressed anchor cable strengthening slope is summarized. 2. The influencing factors of pre-stress failure of anchor cable are studied. At the same time, the commonly used slope stability analysis method is analyzed at the same time. The advantages and disadvantages of these methods and their scope of application are summarized. The main factors and failure forms that affect the slope instability are introduced in detail, and the single anchor is deeply studied. The influence of Group Anchor failure on Slope Stability. 3 the numerical analysis theory is studied. At the same time, the yield criterion and constitutive model of slope instability are selected. 4. The horizontal displacement of slope is analyzed by numerical analysis software FLAC3D. The development of vertical displacement and plastic zone is numerically simulated. Finally, the influence of prestressed cable failure on slope stability is studied in this paper. The deformation and safety coefficient of the slope under various failure conditions of anchor cable prestress are obtained, and some relevant measures to improve the failure of anchor cable prestress are put forward.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU45

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本文編號：1474230