本文選題：高填土 + 大跨徑��； 參考：《湖南大學(xué)》2014年碩士論文

【摘要】：目前的涵洞主要是鋼筋混凝土結(jié)構(gòu)，但由于施工繁瑣、工期長(zhǎng)，而且在使用的過程中會(huì)經(jīng)常出現(xiàn)混凝土板開裂、基礎(chǔ)沉降等病害，，尤其在高填土路基下更為明顯，嚴(yán)重影了響結(jié)構(gòu)的正常使用和交通運(yùn)輸安全。因此尋找一種施工簡(jiǎn)單、承載力強(qiáng)且又經(jīng)濟(jì)適用的結(jié)構(gòu)成為工程技術(shù)人員的重要任務(wù)。 鋼波紋管涵結(jié)構(gòu)有效地避免鋼筋混凝土結(jié)構(gòu)缺點(diǎn)和不足，該結(jié)構(gòu)有著以下幾方面的優(yōu)勢(shì)：（1）結(jié)構(gòu)承載能力大，抗變形能力和基礎(chǔ)適應(yīng)能力強(qiáng)；（2）施工速度快，能大幅縮短工期；（3）與混凝土結(jié)構(gòu)相比造價(jià)低，管徑越大越經(jīng)濟(jì)。 本文主要研究?jī)?nèi)容及成果如下： （1）采用ANSYS有限元建模方法對(duì)鋼波紋管涵洞進(jìn)行了數(shù)值計(jì)算，分析結(jié)構(gòu)在不同施工工況、不同參數(shù)、恒活載作用以及地基沉降下的受力特點(diǎn)、變形規(guī)律和周圍土壓力變化情況，結(jié)果表明：波紋大小對(duì)管涵性能都有一定的影響，板厚主要影響結(jié)構(gòu)受力，填土模量對(duì)受力和變形影響都較大。當(dāng)管頂填土達(dá)到14m以上時(shí)，管涵的受力和變形明顯變緩，活載在管頂填土達(dá)到9m左右時(shí)可以忽略不計(jì)。不對(duì)稱回填在填土的初始階段對(duì)鋼波紋管涵結(jié)構(gòu)的影響最大。一定范圍內(nèi)的地基沉降對(duì)管涵的影響不是很大，說明管涵適應(yīng)地基的能力良好； （2）對(duì)高填土下的鋼波紋管涵進(jìn)行現(xiàn)場(chǎng)試驗(yàn)力學(xué)性能研究，研究鋼波紋管涵在施工階段的受力和變形變化規(guī)律。試驗(yàn)結(jié)果表明：管頂填土將形成土拱效應(yīng)，并隨著填土高度的增加逐漸變大，有效地緩解了結(jié)構(gòu)受力和變形的變化，有利于改善結(jié)構(gòu)受力狀況； （3）將有限元計(jì)算結(jié)果與實(shí)測(cè)數(shù)據(jù)作對(duì)比，結(jié)果表明計(jì)算結(jié)果與試驗(yàn)數(shù)據(jù)吻合度較好，誤差基本滿足要求，并通過分析總結(jié)提出合理的工程設(shè)計(jì)方法和施工建議，比如波形的選擇，管涵環(huán)向拼裝縫位置的設(shè)計(jì)等； （4）通過研究對(duì)比國(guó)內(nèi)外各種鋼波紋管涵規(guī)范，結(jié)合工程的實(shí)際情況，對(duì)現(xiàn)有的鋼波紋管設(shè)計(jì)計(jì)算公式進(jìn)行修正、優(yōu)化，為國(guó)內(nèi)對(duì)鋼波紋管涵的設(shè)計(jì)研究提供一定的參考價(jià)值。
[Abstract]:At present, the culvert is mainly reinforced concrete structure, but because the construction is tedious, the construction period is long and the concrete slab cracking and foundation settlement will often occur in the process of using, especially under the high fill subgrade, it is more obvious. A serious impact on the normal use of the structure and traffic safety. Therefore, it is an important task for engineers to find a structure with simple construction, strong bearing capacity and economic applicability. The steel corrugated pipe culvert structure effectively avoids the shortcomings and shortcomings of the reinforced concrete structure. The structure has the following advantages: (1) the bearing capacity of the structure is large, the ability of resisting deformation and the adaptability of the foundation are strong; (2) the construction speed is fast, and the construction period can be greatly shortened. (3) compared with the concrete structure, the cost is lower, and the bigger the pipe diameter is, the more economical it is. The main contents and results of this paper are as follows: (1) the numerical calculation of steel bellows culvert is carried out by using ANSYS finite element modeling method, and the structure is analyzed under different construction conditions and different parameters. The effect of dead load, the stress characteristics of foundation settlement, the law of deformation and the variation of surrounding earth pressure show that the corrugation size has certain influence on the performance of pipe culvert, and the thickness of plate mainly affects the stress of the structure. The modulus of fill has a great effect on stress and deformation. When the pipe top fill reaches more than 14 m, the stress and deformation of the pipe culvert become slower obviously, and the live load can be ignored when the pipe top fill reaches about 9 m. Asymmetric backfill has the greatest influence on steel bellows culvert structure in the initial stage of filling. The influence of foundation settlement in a certain range on pipe culvert is not very great, which indicates that the capacity of pipe culvert to adapt to foundation is good. (2) the mechanical properties of steel corrugated pipe culvert under high fill are studied in situ. The law of stress and deformation of corrugated steel pipe culvert in construction stage is studied. The test results show that the soil arch effect will be formed on the top of the pipe, and the soil arch effect will become larger with the increase of the filling height, which can effectively alleviate the changes of the structure stress and deformation, and is beneficial to the improvement of the structure stress condition. (3) comparing the finite element calculation results with the measured data, the results show that the calculation results are in good agreement with the test data, and the errors basically meet the requirements. The reasonable engineering design methods and construction suggestions are put forward through analysis and summary. For example, the selection of the waveform, the design of the position of the pipe circumferential assembling joint, etc. (4) through the research and comparison of various steel corrugated pipe culvert codes at home and abroad, combined with the actual situation of the project, the existing formulas for the design and calculation of the steel corrugated pipe are revised. The optimization provides a certain reference value for the design of steel bellows culvert in China.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U449.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 韓曉強(qiáng);;鐵路鋼波紋管涵洞的計(jì)算分析[J];工程建設(shè)與設(shè)計(jì);2007年11期

2 李祝龍,章金釗;高原多年凍土地區(qū)波紋管涵應(yīng)用技術(shù)研究[J];公路;2000年02期

3 陳昌偉;波形鋼板結(jié)構(gòu)及其在公路工程中的應(yīng)用[J];公路;2000年07期

4 符進(jìn);章金釗;劉戈;;中尼公路金屬波紋管涵洞的設(shè)計(jì)[J];公路;2008年09期

5 王艷麗;李祝龍;吳大中;;鋼波紋管涵洞的薄殼效應(yīng)[J];公路交通科技;2008年05期

6 呂棟;;鋼波紋管涵洞在高等級(jí)公路中的應(yīng)用[J];山西建筑;2008年15期

7 李永生,周毅錦,許志興,王銀惠,陳立蘇;局部應(yīng)力-應(yīng)變法預(yù)測(cè)大型波紋管的疲勞壽命[J];南京化工大學(xué)學(xué)報(bào)(自然科學(xué)版);1999年01期

8 王永崗,戴詩(shī)亮,呂英民;波紋管在任意載荷作用下的幾何非線性分析[J];清華大學(xué)學(xué)報(bào)(自然科學(xué)版);2002年02期

9 彭述權(quán);樊玲;蔣滄如;周健;;波紋鋼板橋涵結(jié)構(gòu)計(jì)算及其敏感性分析[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);2005年12期

10 馮忠居;大型溝埋式蛋型管道土壓力的非線性有限元分析[J];西安公路交通大學(xué)學(xué)報(bào);1996年04期

本文編號(hào)：2082491