發(fā)布時(shí)間：2018-05-16 09:16

  本文選題：橋梁工程 + 大跨連續(xù)梁　； 參考：《長(zhǎng)安大學(xué)》2017年碩士論文

【摘要】：為了保證橋梁施工質(zhì)量和橋梁施工安全,橋梁施工控制是不可缺少的。橋梁施工控制是橋梁建設(shè)質(zhì)量的重要保證措施。通過開展施工監(jiān)控工作,每種體系的橋梁所采用的施工方法均按預(yù)定的程序進(jìn)行,施工階段中結(jié)構(gòu)的內(nèi)力和變形是可以預(yù)計(jì)的,同時(shí)可通過監(jiān)測(cè)手段得到各施工階段結(jié)構(gòu)的實(shí)際內(nèi)力和變形。論文圍繞某上跨鐵路大跨度預(yù)應(yīng)力混凝土連續(xù)梁橋,跟蹤每個(gè)施工環(huán)節(jié),將施工控制技術(shù)成功用于指導(dǎo)生產(chǎn)實(shí)踐,從而確保大橋順利施工。(1)首先介紹了橋梁的工程概況,包括設(shè)計(jì)思路、總體布置。該橋跨徑布置為(58+105+58)m,全長(zhǎng)為221m,采用懸臂施工的方法。(2)從防電棚設(shè)計(jì)與施工和掛籃的設(shè)計(jì)與施工兩個(gè)方面,總結(jié)歸納上跨鐵路大跨連續(xù)梁施工安全控制。(3)進(jìn)行了連續(xù)梁橋的施工監(jiān)測(cè)與控制實(shí)施方案研究,給出了施工監(jiān)控的依據(jù),以及施工監(jiān)控的實(shí)施過程包括施工仿真分析、階段劃分及測(cè)點(diǎn)布置。(4)對(duì)連續(xù)梁橋結(jié)構(gòu)數(shù)值進(jìn)行分析,研究橋梁結(jié)構(gòu)建模思路,建模方法以及建模的主要過程,給出連續(xù)梁橋不同施工階段下結(jié)構(gòu)的內(nèi)力及變形分析結(jié)果。(5)進(jìn)行了連續(xù)梁橋理論計(jì)算值與施工監(jiān)測(cè)結(jié)果對(duì)比分析,并進(jìn)行了實(shí)測(cè)的應(yīng)力及線形數(shù)據(jù)規(guī)律統(tǒng)計(jì),各施工階段結(jié)構(gòu)體系變化所產(chǎn)生的拉、壓應(yīng)力(應(yīng)變)變化,均在允許范圍之內(nèi),控制目標(biāo)線形與實(shí)測(cè)線形吻合較好,基本達(dá)到了預(yù)期的效果,滿足橋面平順性的要求。(6)分析了混凝土箱梁溫度場(chǎng)特點(diǎn),將實(shí)測(cè)溫度梯度和規(guī)范梯度進(jìn)行對(duì)比分析,并計(jì)算了最大懸臂狀態(tài)下的主梁的位移和應(yīng)力�？偨Y(jié)歸納錨下預(yù)應(yīng)力的檢測(cè)方法和評(píng)定依據(jù),對(duì)施工階段的預(yù)應(yīng)力檢測(cè)結(jié)果進(jìn)行分析。
[Abstract]:In order to ensure bridge construction quality and bridge construction safety, bridge construction control is indispensable. Bridge construction control is an important guarantee of bridge construction quality. By carrying out construction monitoring work, the construction methods used in each system of bridges are carried out according to the predetermined procedures, and the internal forces and deformation of the structures in the construction phase can be predicted. At the same time, the actual internal force and deformation of each construction stage can be obtained by means of monitoring. This paper focuses on a long-span prestressed concrete continuous beam bridge of an upper span railway, tracks every construction link, successfully applies the construction control technology to guide the production practice, thus ensures the smooth construction of the bridge, firstly introduces the general situation of the bridge engineering. Including design ideas, general layout. The span of the bridge is arranged as 58,105,58m, with a total length of 221m.The method of cantilever construction is used in the design and construction of electric sheds and the design and construction of hanging baskets. The construction monitoring and control scheme of continuous beam bridge is studied, the basis of construction monitoring and control is given, and the implementation process of construction monitoring includes construction simulation analysis. Stage division and measuring point arrangement. (4) analyzing the numerical value of continuous beam bridge structure, studying the bridge structure modeling idea, modeling method and main process of modeling. The analysis results of internal force and deformation of the structure under different construction stages of continuous beam bridge are given. (5) the theoretical calculation value of continuous beam bridge and the construction monitoring result are compared and analyzed, and the measured stress and linear data are calculated and analyzed. The variation of tensile and compressive stress (strain) caused by the change of structure system in each construction stage is within the allowable range. The linear shape of the control target is in good agreement with the measured one, and the expected effect is basically achieved. The characteristics of temperature field of concrete box girder are analyzed, the measured temperature gradient and the standard gradient are compared and analyzed, and the displacement and stress of the main beam under the maximum cantilever state are calculated. The test method and evaluation basis of prestress under anchor are summarized, and the test results of prestress in construction stage are analyzed.
【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

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