本文選題：鐵路跨線橋 + 有限凈空　； 參考：《石家莊鐵道大學(xué)》2014年碩士論文

【摘要】：近年來，隨著鐵路建設(shè)規(guī)模的擴(kuò)大、路網(wǎng)加密，新建鐵路線與既有鐵路線相互交叉日益增多，同時(shí)城市空間也越來越小，這些因素造成一類跨線橋設(shè)計(jì)凈空有限，梁底標(biāo)高低，距離接觸網(wǎng)近。跨線橋梁是各施工項(xiàng)目的重點(diǎn)難點(diǎn)工程，特別是有限凈空的跨越既有鐵路線橋梁。在有限凈空下，出于對(duì)安全性和對(duì)既有線路的影響的考慮，，不能夠使用傳統(tǒng)支架法進(jìn)行施工，如何選擇科學(xué)合理的梁部（上部結(jié)構(gòu)）施工方案來保證工程的方案最優(yōu)，是現(xiàn)階段擺在工程人員面前的一個(gè)十分重要的問題。 鐵路跨線橋有限凈空施工方案優(yōu)選是一個(gè)多屬性決策問題，由于行車密度越來越大，施工天窗時(shí)間限制越來越多，加之工期、成本、安全等多種因素，施工方案的優(yōu)選必須以系統(tǒng)思路為基礎(chǔ)，考慮施工項(xiàng)目外部和內(nèi)部的各種復(fù)雜聯(lián)系和復(fù)雜因素。優(yōu)選的實(shí)現(xiàn)需要在系統(tǒng)理論的指導(dǎo)下通過分析、建模、推理和判斷等過程。文章首先就選題背景、意義、國(guó)內(nèi)外研究現(xiàn)狀進(jìn)行了論述并提出了研究思路以及方法；其次分析了跨線橋及鐵路界限的相關(guān)概念，論述了鐵路跨線橋有限凈空施工的相關(guān)特性；第三，分析了影響方案優(yōu)選的機(jī)理，找出了影響優(yōu)選的因素，根據(jù)施工特性和選擇評(píng)價(jià)指標(biāo)的原則建立了方案優(yōu)選評(píng)價(jià)指標(biāo)；第四，通過決策實(shí)驗(yàn)室模型對(duì)各個(gè)指標(biāo)因素進(jìn)行分析，計(jì)算各因素的原因度及中心度，找出關(guān)鍵因素，并確定其在系統(tǒng)中的權(quán)重；第五，建立優(yōu)選模型，用物元模型進(jìn)行施工方案的多屬性綜合優(yōu)選評(píng)價(jià)；最后，以浙贛上線跨越既有筧杭線橋梁施工項(xiàng)目為案例，對(duì)工程實(shí)例的設(shè)計(jì)施工方案進(jìn)行多因素綜合優(yōu)選評(píng)價(jià)，對(duì)模型進(jìn)行了實(shí)踐檢驗(yàn)。
[Abstract]:In recent years, with the expansion of the railway construction scale, the road network encryption, the new railway line and the existing railway line intercross with each other increasing, and the urban space is becoming smaller and smaller. These factors cause a kind of bridge design clearance, the bottom of the beam bottom and the distance to the contact network. In the limited clearance, under the limited clearance, the traditional scaffolding method can not be used for the safety and the influence of the existing lines. How to choose the scientific and reasonable construction scheme of the beam (superstructure) to ensure the optimal project is a ten in front of the engineering staff at the present stage. It is an important issue.
The optimization of the construction scheme for the limited clearance of the railway overpass is a multi attribute decision making problem. As the driving density is increasing, the time limit of the construction skylight is more and more, and the time limit, the cost and the safety are many factors. The optimization of the construction plan must be based on the system thought, taking into account the complex connections between the outside and the interior of the construction project. The optimal realization needs the process of analysis, modeling, reasoning and judgment under the guidance of the system theory. First, the article discusses the background, significance, the status of the research at home and abroad, and puts forward the research ideas and methods. Secondly, it analyzes the related concepts of the crossing bridge and railway line, and discusses the limited railway overpass bridge. Third, analyze the mechanism that influence the optimization of the scheme, find out the factors that affect the optimization, establish the evaluation index of the scheme according to the principle of the construction characteristic and the selection evaluation index; fourth, analyze the factors by the model of the decision laboratory, and calculate the reason and the center degree of each factor. Find the key factors and determine its weight in the system; fifth, establish the optimal model, use the matter element model to carry out the multi attribute comprehensive optimization evaluation of the construction scheme. Finally, taking Zhejiang Jiangxi line across the existing construction project of the existing soap Hangzhou line as the case, the multi factor optimization evaluation is carried out on the design project of the project example, and the model is made. The practice test was carried out.
【學(xué)位授予單位】：石家莊鐵道大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U445.1

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