【摘要】：隨著“一帶一路”戰(zhàn)略驅(qū)動(dòng)的持續(xù)推進(jìn),列車時(shí)速行車密度的提高,對(duì)列車線路的使用需求日益增大。鑒于此,平交改立交的方式愈加迫切。而大跨度框架橋所占比重越來(lái)越大,為滿足大跨度框架橋剛度的要求則需加厚結(jié)構(gòu)斷面,從而增加結(jié)構(gòu)自重和頂力,施工難度和工程造價(jià)大大增加,受力狀況變得比較復(fù)雜,施工中影響因素更多。因此,如何減少對(duì)既有線路的行車影響,使框架橋快速、準(zhǔn)確就位,以及解決架空、頂進(jìn)過(guò)程中出現(xiàn)的各種問(wèn)題,減少施工中對(duì)框架橋力學(xué)條件的不利影響,成為框架橋施工控制中迫切需要解決的問(wèn)題。本文依托南水北調(diào)中線總干渠焦枝線平頂山西鐵路暗渠工程為背景,采用一種特殊的結(jié)構(gòu)和施工工法來(lái)滿足本項(xiàng)目的要求,重點(diǎn)研究在既有鐵路多股道條件下深基坑大跨度架空頂進(jìn)的結(jié)構(gòu)設(shè)計(jì)和施工工法。本文采用Midas GTS有限元軟件進(jìn)行數(shù)值模擬計(jì)算,首先進(jìn)行模型的建立,定義各種相關(guān)因素,并對(duì)邊界條件和荷載進(jìn)行定義與施加。結(jié)合工程實(shí)例,通過(guò)有限元計(jì)算與實(shí)際監(jiān)測(cè),分析不同工況下結(jié)構(gòu)的位移與應(yīng)力,目的在于論證本文所提出的工法的合理性與可行性。本文在借鑒常規(guī)架空頂進(jìn)的基礎(chǔ)上,結(jié)合項(xiàng)目實(shí)際情況,化整為零,創(chuàng)造性地將單層結(jié)構(gòu)調(diào)整為分體式雙層結(jié)構(gòu);將成熟的單次架空頂進(jìn)工法升級(jí)為兩次架空、分層多次頂進(jìn)的新型工法,保證了項(xiàng)目的順利實(shí)施。本研究的內(nèi)容不但具有科研意義,還能用于指導(dǎo)工程實(shí)踐,對(duì)類似的工程起到很大的借鑒作用。
[Abstract]:With the continuous development of "Belt and Road" strategy driving and the increasing of train speed density, the demand for the use of train line is increasing day by day. In view of this, the way of level-to-turn interchange is becoming more and more urgent. However, the proportion of long-span frame bridge is more and more large. In order to meet the requirement of stiffness of long-span frame bridge, it is necessary to strengthen the section of the structure, thus increasing the weight and the top force of the structure, increasing the construction difficulty and engineering cost, and the stress condition becomes more complicated. There are more influential factors in construction. Therefore, how to reduce the impact on the existing lines, to make the frame bridge fast and accurate, and to solve the various problems in the process of overhead and jacking, and to reduce the negative impact on the mechanical conditions of the frame bridge during construction. It is an urgent problem to be solved in the construction control of frame bridge. In this paper, based on the project of the main trunk channel of the South-to-North Water transfer Project in Pingdingshan West Railway, a special structure and construction method is adopted to meet the requirements of the project. The structural design and construction method of large span overhead jacking in deep foundation pit under the condition of existing railway multi-track are studied. In this paper, the Midas GTS finite element software is used for numerical simulation. Firstly, the model is established, various relevant factors are defined, and the boundary conditions and loads are defined and applied. Combined with engineering examples, the displacement and stress of structures under different working conditions are analyzed through finite element calculation and actual monitoring. The purpose of this paper is to prove the rationality and feasibility of the engineering method proposed in this paper. On the basis of drawing lessons from the conventional overhead jacking and combining with the actual situation of the project, this paper creatively adjusts the single-layer structure to the split double-layer structure, and upgrades the mature single-stage overhead jacking method to the two-stage overhead structure. The new method of stratification and multiple jacking ensures the smooth implementation of the project. The content of this study not only has scientific research significance, but also can be used to guide engineering practice, which can be used for reference to similar projects.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U445.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

1 陳波;;框架橋頂進(jìn)施工時(shí)既有鐵路架空加固技術(shù)分析[J];工程建設(shè)與設(shè)計(jì);2016年17期

2 朱繼濤;;在頂進(jìn)框架橋(涵)中幾種線路加固方法的比選[J];山東工業(yè)技術(shù);2014年19期

3 史晉峰;;橋體頂進(jìn)施工法在框架橋工程施工中的應(yīng)用[J];交通世界(建養(yǎng).機(jī)械);2011年07期

4 李家穩(wěn);韓寶明;施仲衡;李幫德;;管棚和盾構(gòu)法框架橋設(shè)計(jì)與施工技術(shù)的研究[J];鐵道標(biāo)準(zhǔn)設(shè)計(jì);2009年04期

5 陳正斌;;淺談橋梁與城市景觀[J];重慶交通大學(xué)學(xué)報(bào)(自然科學(xué)版);2008年02期

6 楊慧林;地道橋方案設(shè)計(jì)中應(yīng)著重考慮的若干問(wèn)題[J];鐵道標(biāo)準(zhǔn)設(shè)計(jì);2004年10期

7 朱合華,丁文其;地下結(jié)構(gòu)施工過(guò)程的動(dòng)態(tài)仿真模擬分析[J];巖石力學(xué)與工程學(xué)報(bào);1999年05期

相關(guān)碩士學(xué)位論文 前4條

1 宋桂杰;框架橋頂進(jìn)過(guò)程安全性研究[D];北方工業(yè)大學(xué);2014年

2 李仁濤;大跨度框構(gòu)地道橋頂進(jìn)施工空間有限元分析[D];北方工業(yè)大學(xué);2013年

3 方笑;斜交地道橋頂進(jìn)施工階段空間受力行為分析及現(xiàn)場(chǎng)監(jiān)測(cè)[D];北京交通大學(xué);2010年

4 王世付;淺埋地道橋頂進(jìn)施工技術(shù)及地面沉降分析[D];西南交通大學(xué);2008年

，

本文編號(hào)：2151783