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

【摘要】：復(fù)合土釘支護(hù)是近年來在土釘支護(hù)形式的基礎(chǔ)上發(fā)展起來的新型支護(hù)結(jié)構(gòu)。它根據(jù)具體的工程條件，將土釘支護(hù)與深層攪拌樁、旋噴樁、微型樁、鋼管或預(yù)應(yīng)力錨桿等結(jié)構(gòu)結(jié)合起來，形成一種復(fù)合基坑支護(hù)技術(shù)，該技術(shù)克服了傳統(tǒng)土釘支護(hù)技術(shù)不能控制邊坡變形的缺陷，具有安全可靠、造價(jià)低、工期短、使用范圍廣等特點(diǎn)，獲得了越來越廣泛的工程應(yīng)用。因此，開展對(duì)復(fù)合土釘支護(hù)技術(shù)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(hù)工程，分析工程中的復(fù)合土釘支護(hù)的穩(wěn)定性，并且計(jì)算其可靠度指標(biāo)。主要內(nèi)容如下： 運(yùn)用FLAC3D模擬本工程中復(fù)合土釘支護(hù)，確定各種軟件運(yùn)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(yù)應(yīng)力的施加等�；趯�(shí)例，探討在不同工程情況下復(fù)合土釘支護(hù)對(duì)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(fù)合土釘支護(hù)對(duì)施工過程中的變形可以有良好的壓制效果。通過計(jì)算，分別探討預(yù)應(yīng)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(fù)合土釘支護(hù)體系的參數(shù)發(fā)生變化時(shí)而產(chǎn)生的效應(yīng)。討論其作用的原理，并為實(shí)際工程的設(shè)計(jì)提供建議。編制了基于遺傳算法的Matlab計(jì)算程序，計(jì)算青島火車站站房改造工程基坑復(fù)合土釘支護(hù)體系的可靠度，并對(duì)預(yù)應(yīng)力錨桿、土釘?shù)脑O(shè)計(jì)參數(shù)進(jìn)行變化，分別計(jì)算對(duì)應(yīng)的可靠度指標(biāo)，得出可靠度指標(biāo)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(xué)位授予單位】：中國石油大學(xué)（華東）
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU476

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

1 鄧祥明,張凡;土釘支護(hù)結(jié)構(gòu)中土釘?shù)淖饔脵C(jī)理分析[J];四川建筑科學(xué)研究;2004年04期

2 張明聚;張文宇;杜修力;李鳳偉;;復(fù)合土釘支護(hù)在近接高速公路基坑工程中的應(yīng)用[J];北京工業(yè)大學(xué)學(xué)報(bào);2009年02期

3 張同偉,黃生文,張起森;土釘支護(hù)邊坡穩(wěn)定性的可靠性分析與評(píng)價(jià)[J];長沙交通學(xué)院學(xué)報(bào);2003年03期

4 鄭大平;姜睿;鄭衛(wèi)鋒;;深基坑預(yù)應(yīng)力錨桿柔性支護(hù)技術(shù)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(biāo)分析[J];合肥工業(yè)大學(xué)學(xué)報(bào)(自然科學(xué)版);2002年03期

6 金清平;李小青;胡斌;;復(fù)合土釘支護(hù)結(jié)構(gòu)水平位移分析研究[J];武漢理工大學(xué)學(xué)報(bào);2010年01期

7 楊志銀,張俊,王凱旭;復(fù)合土釘墻技術(shù)的研究及應(yīng)用[J];巖土工程學(xué)報(bào);2005年02期

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