本文選題：復合土釘支護 + 數(shù)值模擬��； 參考：《中國石油大學（華東）》2013年碩士論文

【摘要】：復合土釘支護是近年來在土釘支護形式的基礎上發(fā)展起來的新型支護結(jié)構。它根據(jù)具體的工程條件，將土釘支護與深層攪拌樁、旋噴樁、微型樁、鋼管或預應力錨桿等結(jié)構結(jié)合起來，形成一種復合基坑支護技術，該技術克服了傳統(tǒng)土釘支護技術不能控制邊坡變形的缺陷，具有安全可靠、造價低、工期短、使用范圍廣等特點，獲得了越來越廣泛的工程應用。因此，開展對復合土釘支護技術的穩(wěn)定性和可靠度的研究是十分有必要的。 本文主要是基于青島火車站站房基坑支護工程，分析工程中的復合土釘支護的穩(wěn)定性，并且計算其可靠度指標。主要內(nèi)容如下： 運用FLAC3D模擬本工程中復合土釘支護，確定各種軟件運行中所需要的參數(shù)。模擬基坑開挖的過程，，研究土體與錨桿、土釘?shù)南嘟�，預應力的施加等�；趯嵗�，探討在不同工程情況下復合土釘支護對土體變形的影響。經(jīng)過類比有差異的工程情況下所產(chǎn)生的變形，可以看出復合土釘支護對施工過程中的變形可以有良好的壓制效果。通過計算，分別探討預應力錨桿以及土釘?shù)妮S力，繪制其變化曲線，得出規(guī)律。探討基坑的穩(wěn)定性隨著復合土釘支護體系的參數(shù)發(fā)生變化時而產(chǎn)生的效應。討論其作用的原理，并為實際工程的設計提供建議。編制了基于遺傳算法的Matlab計算程序，計算青島火車站站房改造工程基坑復合土釘支護體系的可靠度，并對預應力錨桿、土釘?shù)脑O計參數(shù)進行變化，分別計算對應的可靠度指標，得出可靠度指標隨參數(shù)變化的產(chǎn)生的變化規(guī)律。
[Abstract]:Composite soil nailing is a new type of support structure developed on the basis of soil nailing in recent years. According to the specific engineering conditions, it combines soil nailing support with deep mixing pile, rotary jet pile, micro pile, steel pipe or prestressed anchor to form a composite foundation pit supporting technology. This technique overcomes the defects that the traditional soil nailing support technology can not control the slope deformation, and has the characteristics of safety and reliability, low cost, short time limit and wide range of application, so it has been more and more widely used in engineering. Therefore, it is necessary to study the stability and reliability of composite soil nailing. The reliability index is calculated. The main contents are as follows: FLAC3D is used to simulate the composite soil nailing support in this project and the parameters needed in the operation of various software are determined. In order to simulate the excavation process of foundation pit, the connection of soil and anchor rod, soil nailing and the application of prestress are studied. Based on an example, the influence of composite soil nailing on soil deformation is discussed in different engineering conditions. By analogy with the deformation under the different engineering conditions, it can be seen that the composite soil nailing support can have a good suppression effect on the deformation in the construction process. Through calculation, the axial force of prestressed anchor rod and soil nailing is discussed, and its changing curve is drawn. The effect of the stability of foundation pit with the change of the parameters of composite soil nailing support system is discussed. The principle of its action is discussed, and some suggestions are provided for the design of practical engineering. A Matlab program based on genetic algorithm is developed to calculate the reliability of the composite soil nailing support system of the foundation pit in the reconstruction project of the station house of Qingdao Railway Station. The design parameters of the prestressed anchor rod and soil nailing are changed and the corresponding reliability indexes are calculated respectively. The variation law of reliability index with parameter change is obtained.
【學位授予單位】：中國石油大學（華東）
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU476

【參考文獻】

相關期刊論文 前7條

1 鄧祥明,張凡;土釘支護結(jié)構中土釘?shù)淖饔脵C理分析[J];四川建筑科學研究;2004年04期

2 張明聚;張文宇;杜修力;李鳳偉;;復合土釘支護在近接高速公路基坑工程中的應用[J];北京工業(yè)大學學報;2009年02期

3 張同偉,黃生文,張起森;土釘支護邊坡穩(wěn)定性的可靠性分析與評價[J];長沙交通學院學報;2003年03期

4 鄭大平;姜睿;鄭衛(wèi)鋒;;深基坑預應力錨桿柔性支護技術的穩(wěn)定與變形研究[J];工程勘察;2007年12期

5 王國體,陳名昭,周新宇,寇明國;土坡穩(wěn)定可靠度指標分析[J];合肥工業(yè)大學學報(自然科學版);2002年03期

6 金清平;李小青;胡斌;;復合土釘支護結(jié)構水平位移分析研究[J];武漢理工大學學報;2010年01期

7 楊志銀,張俊,王凱旭;復合土釘墻技術的研究及應用[J];巖土工程學報;2005年02期

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