【摘要】：本文以廣西靖那高速公路3標(biāo)百大特大橋作為施工實例,著重放在大跨高墩連續(xù)剛構(gòu)橋?qū)嵤┻^程中中的重難點技術(shù)進(jìn)行了深入的總結(jié)研究。(1)薄壁高墩采用翻模+外包提升架施工工藝確保施工作業(yè)人員安全操作。采用高精度全站儀和激光垂準(zhǔn)儀相結(jié)合的方法進(jìn)行高墩翻模模板定位,并通過數(shù)據(jù)分析,這兩種方法相互校核,確保了高墩施工垂直度。(2)采用墩頂砂箱臨時固結(jié)技術(shù),確保了連續(xù)梁施工穩(wěn)定安全和臨時支座拆除便捷。并利用MIDAS CIVIL 2010有限元計算軟件對墩梁臨時固結(jié)、0#塊托架及掛籃施工進(jìn)行整體建模分析,確保受力計算全面、合理、可靠,方案最優(yōu)。(3)運用信息化監(jiān)測技術(shù),對薄壁墩及主梁進(jìn)行應(yīng)力應(yīng)變監(jiān)測,確保橋梁施工過程受力和變形受控。利用ASCB程序?qū)θ珮驑蚨占跋淞涸谑┕るA段受力進(jìn)行建模計算,分析橋梁施工階段理論受力,與現(xiàn)場監(jiān)測數(shù)據(jù)對比,理論分析與監(jiān)測數(shù)據(jù)雙控,確保了結(jié)構(gòu)安全,線型受控。(4)通過增加邊跨不平衡懸臂澆筑段,優(yōu)化縮短邊跨現(xiàn)澆段長度,優(yōu)化后邊跨現(xiàn)澆段可采用無平衡配重托架施工,解決高邊墩長大邊跨現(xiàn)澆段在復(fù)雜地質(zhì)地形條件下的施工難題。確保了施工質(zhì)量,提高了施工效率。(5)優(yōu)化調(diào)整多跨連續(xù)剛構(gòu)合攏次序,采用先中跨、再次邊跨,最后邊跨合攏的順序,一方面解決了邊跨不平衡懸臂澆筑段的影響,另一方面加快了上部箱梁施工進(jìn)度。
[Abstract]:In this paper, a construction example of a hundred major bridges in Jingna Expressway, Guangxi, is presented. The emphasis is placed on the heavy and difficult techniques in the implementation of continuous rigid frame bridges with long span and high piers. (1) the construction technology of overturning high piers is adopted to ensure the safe operation of construction workers. The high precision total station instrument and laser vertical register are used to locate the high pier turnover formwork. Through the data analysis, the two methods are checked each other to ensure the perpendicularity of the high pier construction. (2) the temporary consolidation technology of the sand box on the top of the pier is adopted. It ensures the construction stability and safety of continuous beam and convenient removal of temporary support. By using MIDAS CIVIL 2010 finite element calculation software, the integral modeling and analysis of temporary consolidation block bracket and hanging basket construction of pier and beam are carried out to ensure comprehensive, reasonable, reliable and optimal scheme. (3) Information monitoring technology is used. The stress and strain monitoring of thin-walled piers and main beams is carried out to ensure that the stress and deformation of the bridge are controlled during construction. Using ASCB program to model and calculate the force of the bridge pier and box girder in the construction stage, analyzing the theoretical force of the bridge during the construction stage, comparing with the monitoring data, the double control of the theoretical analysis and monitoring data ensures the safety of the structure. Linear control. (4) by increasing the side span unbalance cantilever casting section, the length of the side span cast-in-place section can be optimized and the backside span cast-in-situ section can be constructed with non-balanced counterweight bracket. To solve the construction problem of the cast-in-situ section of the long side span of high side pier under the complex geological terrain conditions. The construction quality is ensured and the construction efficiency is improved. (5) the order of multi-span continuous rigid frame closure is optimized and adjusted, and the order of first middle span, second edge span and last side span closure is adopted, on the one hand, the influence of edge span unbalance cantilever pouring section is solved. On the other hand, it speeds up the construction progress of upper box girder.
【學(xué)位授予單位】：石家莊鐵道大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U445.4

【引證文獻(xiàn)】

相關(guān)期刊論文 前1條

1 楊魯坡;;連續(xù)剛構(gòu)橋高墩邊跨現(xiàn)澆段托架設(shè)計[J];工程技術(shù)研究;2017年02期

，

本文編號：2226180