本文選題：城市道路　切入點(diǎn)：施工安全　出處：《重慶交通大學(xué)》2014年碩士論文

【摘要】：矮塔斜拉橋作為一種介于斜拉橋和連續(xù)梁橋之間的一種新型的橋梁結(jié)構(gòu),以其美觀的結(jié)構(gòu)外形、優(yōu)越的經(jīng)濟(jì)指標(biāo)和良好的受力性能,在國(guó)內(nèi)外得到了廣泛的應(yīng)用。矮塔斜拉橋施工過(guò)程監(jiān)控是保證施工安全以及保證結(jié)構(gòu)運(yùn)營(yíng)期間正常使用性、耐久性及安全性的重要方法。并且,該橋型一般采用懸臂澆筑的方法施工,施工方案對(duì)橋梁施工的精度要求較高。因此,矮塔斜拉橋施工監(jiān)控的研究對(duì)于該橋型的建設(shè)施工具有指導(dǎo)意義。 本文以新建的來(lái)賓永鑫大橋?yàn)楣こ瘫尘?對(duì)矮塔斜拉橋施工監(jiān)控的相關(guān)問(wèn)題進(jìn)行了一些探討。本文的主要研究?jī)?nèi)容包括： ①介紹了矮塔斜拉橋的定義和特點(diǎn),從跨徑布置、受力特點(diǎn)和經(jīng)濟(jì)跨徑等幾個(gè)方面對(duì)比了矮塔斜拉橋和傳統(tǒng)斜拉橋及連續(xù)梁(剛構(gòu))橋的區(qū)別和聯(lián)系；收集和總結(jié)了矮塔斜拉橋的起源和國(guó)內(nèi)外發(fā)展?fàn)顩r；詳細(xì)地綜述了現(xiàn)階段矮塔斜拉橋施工監(jiān)控的研究概況。 ②介紹了矮塔斜拉橋施工監(jiān)控的原則,并從施工監(jiān)測(cè)和施工控制兩個(gè)方面闡述了施工監(jiān)控的具體內(nèi)容；研究了施工控制的方法和原理,通過(guò)不同方法適用性的比選確定了永鑫大橋施工控制的方法�？偨Y(jié)了施工控制精度的各種影響因素,并結(jié)合永鑫大橋的特點(diǎn)提出了一些施工監(jiān)控中相對(duì)應(yīng)的措施和注意事項(xiàng)。 ③運(yùn)用空間有限單元軟件建立了永鑫大橋施工監(jiān)測(cè)計(jì)算的全橋模型,采用正裝法按照施工方案進(jìn)行施工階段仿真分析,計(jì)算各個(gè)施工工況下橋梁結(jié)構(gòu)的內(nèi)力與變形及索力情況,并在施工過(guò)程中同步進(jìn)行參數(shù)的識(shí)別分析,對(duì)監(jiān)控模型進(jìn)行修正；用ANSYS建立了永鑫大橋15#塊主梁橫隔板的實(shí)體局部模型,計(jì)算各施工階段主梁橫橋向應(yīng)力情況；通過(guò)和監(jiān)測(cè)計(jì)算結(jié)果的對(duì)比分析,總結(jié)了誤差的來(lái)源。 ④研究了矮塔斜拉橋施工監(jiān)測(cè)的內(nèi)容和方法,通過(guò)永鑫大橋監(jiān)測(cè)數(shù)據(jù)和計(jì)算數(shù)據(jù)的對(duì)比,分析了誤差的主要來(lái)源,總結(jié)了永鑫大橋施工監(jiān)控過(guò)程中的經(jīng)驗(yàn)和教訓(xùn)。 ⑤對(duì)本文主要研究工作進(jìn)行了總結(jié),并對(duì)后續(xù)研究進(jìn)行了展望。以期望進(jìn)一步推動(dòng)矮塔斜拉橋施工監(jiān)控技術(shù)方法的發(fā)展,為后續(xù)的矮塔斜拉橋的建設(shè)提經(jīng)驗(yàn)總結(jié)。
[Abstract]:As a new type of bridge structure between cable-stayed bridge and continuous girder bridge, low tower cable-stayed bridge has been widely used at home and abroad for its beautiful structure shape, superior economic index and good mechanical performance.The monitoring of construction process of cable-stayed bridge with low tower is an important method to ensure construction safety, normal use, durability and safety of structure during operation.The cantilever pouring method is generally used in the construction of the bridge, and the construction scheme requires high precision of the bridge construction.Therefore, the study of construction monitoring of low tower cable-stayed bridge has guiding significance for the construction of the bridge type.Taking the newly built Yongxin Bridge as the engineering background, this paper discusses some problems related to the construction monitoring of the cable-stayed bridge with low tower.The main contents of this paper are as follows:1. The definition and characteristics of the low tower cable-stayed bridge are introduced. The differences and connections between the low tower cable-stayed bridge and the traditional cable-stayed bridge as well as the continuous beam (rigid frame) bridge are compared from the aspects of span arrangement, stress characteristics and economic span.This paper collects and summarizes the origin of the cable-stayed bridge with low tower and its development at home and abroad, and summarizes in detail the research situation of the construction monitoring of the cable-stayed bridge with low tower at present.2. This paper introduces the principle of construction monitoring of cable-stayed bridge with low tower, expounds the concrete contents of construction monitoring from two aspects of construction monitoring and construction control, and studies the method and principle of construction control.The construction control method of Yongxin Bridge is determined by comparing the applicability of different methods.This paper summarizes various factors affecting construction control precision, and puts forward some corresponding measures and points for attention in construction monitoring combined with the characteristics of Yongxin Bridge.(3) the full-bridge model of Yongxin Bridge construction monitoring calculation is established by using space finite element software, and the internal force, deformation and cable force of the bridge structure under various construction conditions are calculated by using the normal fitting method to carry out the simulation analysis in the construction stage according to the construction plan.In the process of construction, the parameters are identified and analyzed synchronously, the monitoring model is revised, and the solid local model of the main beam diaphragm of Yongxin Bridge 15# block is established by ANSYS to calculate the stress of the main beam transverse bridge in each stage of construction.The source of error is summarized by comparing with the result of monitoring calculation.4. The contents and methods of construction monitoring of low tower cable-stayed bridge are studied. Through the comparison of monitoring data and calculation data of Yongxin Bridge, the main sources of errors are analyzed, and the experience and lessons in the construction monitoring process of Yongxin Bridge are summarized.5. The main research work of this paper is summarized, and the future research is prospected.In order to further promote the development of the construction monitoring technology of the cable-stayed bridge with low tower, the experience of the construction of the cable-stayed bridge with low tower is summarized.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U448.27;U445.4

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