本文選題：基坑　切入點(diǎn)：格形地下連續(xù)墻　出處：《華南理工大學(xué)》2015年碩士論文

【摘要】：近年來,隨著地下空間開發(fā)力度的加大,許多新型的圍護(hù)結(jié)構(gòu)應(yīng)運(yùn)而生,格形地下連續(xù)墻就是其中發(fā)展較為迅速的一種。格形地下連續(xù)墻由于其獨(dú)特的幾何結(jié)構(gòu),整體剛度較大,可以較好地控制基坑的變形,而且其無需內(nèi)支撐體系,也可以作為永久性結(jié)構(gòu)來使用。但由于格形地下連續(xù)墻的結(jié)構(gòu)形式較為復(fù)雜,其理論研究的進(jìn)展遠(yuǎn)遠(yuǎn)滯后于工程實(shí)踐的發(fā)展,結(jié)合格形地下連續(xù)墻的國(guó)內(nèi)外相關(guān)研究現(xiàn)狀以及存在的問題,本文研究的主要內(nèi)容和成果如下:(1)總結(jié)了格形地下連續(xù)墻的特點(diǎn)及研究現(xiàn)狀,提出了該種圍護(hù)結(jié)構(gòu)形式尚需解決的問題。(2)系統(tǒng)地介紹了有限單元法的基本原理和巖土體的本構(gòu)模型,并在此基礎(chǔ)上通過簡(jiǎn)單算例對(duì)本文所要使用的硬化土本構(gòu)模型進(jìn)行了系統(tǒng)的研究,歸納了硬化土參數(shù)選取的方案。(3)基于PLAXIS 3D有限元軟件,建立了以格形地下連續(xù)墻為圍護(hù)結(jié)構(gòu)的準(zhǔn)平面模型和簡(jiǎn)化三維模型,并系統(tǒng)地研究了格形地下連續(xù)墻的變形特性及其空間效應(yīng)。(4)對(duì)以格形地下連續(xù)墻為圍護(hù)結(jié)構(gòu)的基坑進(jìn)行了廣泛的參數(shù)敏感性分析,較為全面地研究了連續(xù)墻的厚度、連續(xù)墻嵌固深度、隔墻的長(zhǎng)度、隔墻的間距、基坑主動(dòng)區(qū)加固、被動(dòng)區(qū)加固和格墻間土加固對(duì)基坑變形特性的影響。(5)根據(jù)以格形地下連續(xù)墻為圍護(hù)結(jié)構(gòu)的某沉管隧道護(hù)岸工程為背景,重點(diǎn)分析了格形地下連續(xù)墻側(cè)向變形的實(shí)測(cè)數(shù)據(jù),并對(duì)比分析了有限元與實(shí)測(cè)數(shù)據(jù)之間的差異,驗(yàn)證了理論分析的合理性。
[Abstract]:In recent years, with the development of underground space, many new types of retaining structures emerge as the times require, and the lattice diaphragm wall is one of the more rapid development.Because of its unique geometric structure and large overall stiffness, the lattice diaphragm wall can control the deformation of foundation pit well, and it can be used as a permanent structure without the need of internal bracing system.However, due to the complexity of the structure form of the lattice underground continuous wall, the development of its theoretical research lags far behind the development of engineering practice. In combination with the domestic and foreign related research status and existing problems of the lattice underground continuous wall, the theoretical research progress of the lattice underground continuous wall is far behind the development of engineering practice.The main contents and results of this paper are as follows: 1) the characteristics and research status of lattice diaphragm wall are summarized.The basic principle of the finite element method and the constitutive model of rock and soil are introduced systematically.On the basis of this, the constitutive model of hardened soil used in this paper is systematically studied by a simple example, and the scheme of selecting parameters of hardened soil is summarized, which is based on PLAXIS 3D finite element software.A quasi plane model and a simplified 3D model with lattice diaphragm wall as retaining structure are established.The deformation characteristics of lattice diaphragm wall and its spatial effect are systematically studied. The sensitivity analysis of parameters for foundation pit with lattice diaphragm wall as retaining structure is carried out, and the thickness of diaphragm wall is studied comprehensively.The embedded depth of the continuous wall, the length of the partition wall, the spacing of the partition wall, the reinforcement of the active zone of the foundation pit,The influence of passive zone reinforcement and soil reinforcement between lattice walls on the deformation characteristics of foundation pit. Based on the background of a submersible tunnel bank revetment project with lattice diaphragm wall as the retaining structure, the measured data of lateral deformation of the lattice underground continuous wall are analyzed emphatically.The difference between the finite element and the measured data is compared and the rationality of the theoretical analysis is verified.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU473

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉國(guó)彬,王印昌;實(shí)測(cè)鋼筋計(jì)應(yīng)力推算地下連續(xù)墻彎矩方法探討[J];地下工程與隧道;2003年01期

2 徐偉;左玉柱;張平;;大型格形地下連續(xù)墻三維數(shù)值模擬受力分析[J];建筑施工;2010年10期

3 王海波;宋二祥;徐明;;地下工程開挖土體硬化模型[J];清華大學(xué)學(xué)報(bào)(自然科學(xué)版);2010年03期

4 夏建國(guó);格形地連墻結(jié)構(gòu)的設(shè)計(jì)與施工方案探討[J];水運(yùn)工程;2004年11期

5 朱小林;由原位測(cè)試估算砂土巖土參數(shù)的方法[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);1995年03期

6 曾國(guó)熙,潘秋元,胡一峰;軟粘土地基基坑開挖性狀的研究[J];巖土工程學(xué)報(bào);1988年03期

7 賈堅(jiān);謝小林;;上海軟土地區(qū)深大基坑的卸荷變形及控制[J];巖土工程學(xué)報(bào);2008年S1期

8 徐中華;王建華;王衛(wèi)東;;軟土地區(qū)采用灌注樁圍護(hù)的深基坑變形性狀研究[J];巖土力學(xué);2009年05期

9 徐中華;王衛(wèi)東;;敏感環(huán)境下基坑數(shù)值分析中土體本構(gòu)模型的選擇[J];巖土力學(xué);2010年01期

10 劉念武;龔曉南;陶艷麗;樓春暉;;軟土地區(qū)嵌巖連續(xù)墻與非嵌巖連續(xù)墻支護(hù)性狀對(duì)比分析[J];巖石力學(xué)與工程學(xué)報(bào);2014年01期

相關(guān)博士學(xué)位論文 前1條

1 丁勇春;軟土地區(qū)深基坑施工引起的變形及控制研究[D];上海交通大學(xué);2009年

相關(guān)碩士學(xué)位論文 前5條

1 周恩平;考慮小應(yīng)變的硬化土本構(gòu)模型在基坑變形分析中的應(yīng)用[D];哈爾濱工業(yè)大學(xué);2010年

2 張志飛;基坑開挖的有限元數(shù)值模擬分析[D];中南大學(xué);2008年

3 黃耀星;花崗巖殘積土誘發(fā)各向異性實(shí)驗(yàn)與工程應(yīng)用研究[D];華僑大學(xué);2012年

4 楊冬雪;深基坑斜支撐數(shù)值模擬應(yīng)用與研究[D];云南大學(xué);2014年

5 徐芫蕾;基坑寬度對(duì)圍護(hù)結(jié)構(gòu)及周邊土體性狀的影響分析[D];浙江大學(xué);2014年

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