本文選題：復(fù)合地基 + 土工格柵��； 參考：《浙江大學(xué)》2013年碩士論文

【摘要】：樁承加筋土復(fù)合地基應(yīng)用于廠房地坪等地基處理工程時(shí),地坪表面往往會(huì)設(shè)置剛性地面層,此時(shí)復(fù)合地基性狀將有別于高填土路堤等柔性路面地基。本文通過(guò)有限元分析方法,研究了地面層剛度和墊層對(duì)樁承加筋土復(fù)合地基性狀的影響。 主要研究?jī)?nèi)容如下： (1)運(yùn)用ABAQUS有限元分析軟件,基于室內(nèi)模型試驗(yàn)建立三維數(shù)值模型,對(duì)沉降、樁土應(yīng)力比、樁身應(yīng)力分布、格柵應(yīng)力分布等進(jìn)行數(shù)值模擬,與試驗(yàn)結(jié)果進(jìn)行比較分析。 (2)分析大面積均布荷載作用下,地面層剛度對(duì)復(fù)合地基的影響。分析表明：隨著地面層剛度減小,樁土應(yīng)力比相應(yīng)減小、地表不均勻沉降增大、格柵應(yīng)力也隨之增大。 (3)分析局部集中荷載作用下,地面層剛度對(duì)復(fù)合地基的影響。結(jié)果表明：隨著地面層剛度減小,樁土應(yīng)力比相應(yīng)減小、地表不均勻和樁-土差異沉降增大、樁身水平位移和格柵應(yīng)力也隨之增大。 (4)剛性地面層下墊層影響分析。分析了墊層材料模量、墊層厚度、格柵模量和格柵位置對(duì)地基樁土應(yīng)力比、沉降、樁身應(yīng)力和格柵應(yīng)力的影響。結(jié)果表明：墊層模量和墊層厚度對(duì)樁土應(yīng)力比和沉降影響顯著；格柵設(shè)置于樁頂平面時(shí),加筋效果較好。
[Abstract]:When pile-supported reinforced soil composite foundation is applied to ground treatment works such as workshop floor, rigid ground layer is often set on the ground surface, and the behavior of composite foundation will be different from that of flexible pavement foundation such as high fill embankment. In this paper, the influence of ground stiffness and cushion on the behavior of pile-supported reinforced soil composite foundation is studied by finite element method. The main contents of the study are as follows: 1) using ABAQUS finite element analysis software, the three-dimensional numerical model is established based on indoor model test. The settlement, pile-soil stress ratio, pile stress distribution and grid stress distribution are numerically simulated, and the results are compared with the experimental results. 2) the influence of ground stiffness on composite foundation under large area uniform load is analyzed. The analysis shows that the pile-soil stress ratio decreases with the decrease of the surface stiffness, the uneven settlement of the ground surface increases, and the grid stress increases. The influence of floor stiffness on composite foundation under local concentrated load is analyzed. The results show that with the decrease of ground stiffness, the pile-soil stress ratio decreases, the ground surface inhomogeneity and pile-soil differential settlement increase, and the horizontal displacement of pile body and grid stress also increase. (4) Analysis of the influence of the rigid ground layer on the underlying layer. The effects of cushion material modulus, cushion thickness, grid modulus and grid position on the stress ratio, settlement, pile body stress and grid stress of foundation pile are analyzed. The results show that the influence of cushion modulus and cushion thickness on the pile-soil stress ratio and settlement is significant, and the reinforcement effect is better when the grid is located in the top plane of the pile.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU470

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 林德建;蔣軍;黃U_勝;羅宏文;;樁承加筋土復(fù)合地基土工格柵張拉力計(jì)算[J];低溫建筑技術(shù);2010年04期

2 龔曉南,褚航;基礎(chǔ)剛度對(duì)復(fù)合地基性狀的影響[J];工程力學(xué);2003年04期

3 李強(qiáng),鄭健龍;樁承土工格網(wǎng)褥墊層的承載特性與設(shè)計(jì)計(jì)算[J];公路;2005年05期

4 譚慧明;;樁承加筋路堤中褥墊層對(duì)地基沉降的影響分析[J];路基工程;2008年03期

5 馬學(xué)寧,楊有海,梁波;土工格柵砂墊層與碎石樁復(fù)合地基承載試驗(yàn)研究[J];蘭州交通大學(xué)學(xué)報(bào);2005年04期

6 董鑫焱;;津汕公路冀津界至冀魯界段軟基處理分析[J];內(nèi)蒙古公路與運(yùn)輸;2011年03期

7 費(fèi)康;劉漢龍;;樁承式加筋路堤設(shè)計(jì)理論研究進(jìn)展[J];水利水電科技進(jìn)展;2008年04期

8 馬建林;劉俊飛;朱明;李寶林;;高速鐵路CFG樁網(wǎng)復(fù)合地基樁土承載特性試驗(yàn)研究[J];鐵道建筑;2009年07期

9 吳慧明,龔曉南;剛性基礎(chǔ)與柔性基礎(chǔ)下復(fù)合地基模型試驗(yàn)對(duì)比研究[J];土木工程學(xué)報(bào);2001年05期

10 饒為國(guó),趙成剛;樁-網(wǎng)復(fù)合地基應(yīng)力比分析與計(jì)算[J];土木工程學(xué)報(bào);2002年02期

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本文編號(hào)：1801218