寶蘭線三陽川大橋48m節(jié)段拼裝梁施工技術(shù)研究
發(fā)布時(shí)間：2018-08-02 10:25
【摘要】：架橋機(jī)是在橋位處進(jìn)行拼裝,然后逐孔施工的一種大型機(jī)械設(shè)備。預(yù)制節(jié)段拼裝施工技術(shù)是利用架橋機(jī)施工中最常見的一中施工方法。節(jié)段拼裝施工需要經(jīng)歷梁段的拼裝、濕接縫混凝土的澆筑、預(yù)應(yīng)力張拉、架橋機(jī)脫架及體系轉(zhuǎn)換等幾個(gè)復(fù)雜的過程,在這些過程中,梁體的內(nèi)力和變形受到各種材料因素的影響,因此研究架橋機(jī)和簡支梁體不同施工工況下的位移和受力狀況并制定詳細(xì)的施工控制方案不僅關(guān)系到架橋機(jī)自身的安全而且關(guān)系到橋梁最終成橋的線形。論文以寶蘭線三陽川特大橋48 m節(jié)段拼裝簡支箱梁為研究背景,首先對(duì)節(jié)段拼裝施工技術(shù)的發(fā)展?fàn)顩r以及研究現(xiàn)狀進(jìn)行了詳細(xì)的闡述,隨后以寶蘭線三陽川特大橋48 m節(jié)段拼裝簡支箱梁為實(shí)例,介紹了施工的主要器械TP48節(jié)段拼裝架橋機(jī)的主要構(gòu)造以及施工的原理及方法,從而將施工過程劃分為架橋機(jī)就位、梁段塊的吊裝、濕接縫混凝土的澆筑、預(yù)應(yīng)力張拉及架橋機(jī)過孔五個(gè)施工階段,利用有限元軟件Midas Civil為工具,通過對(duì)架橋機(jī)的合理簡化,建立了架橋機(jī)和混凝土簡支梁的整體有限元模型,進(jìn)行施工階段的仿真分析,通過對(duì)TP48架橋機(jī)和混凝土梁體力學(xué)行為的分析,得出在節(jié)段拼裝施工過程中混凝土簡支梁體在各施工階段的線形變化以及關(guān)鍵控制截面的受力情況并找出其在整個(gè)施工過程中的變化規(guī)律。論文基于上述理論數(shù)據(jù)的指導(dǎo),針對(duì)寶蘭線三陽川特大橋48 m節(jié)段拼裝施工技術(shù)的特點(diǎn),制定了與之相適應(yīng)的監(jiān)控方案,在節(jié)段拼裝施工過程中,通過對(duì)應(yīng)變器采集數(shù)據(jù)的處理,得到節(jié)段拼裝施工各施工階段結(jié)構(gòu)的實(shí)測值,通過理論值和實(shí)測值的分析與對(duì)比,查找偏差出現(xiàn)的原因,并進(jìn)行糾偏,從而使模型與實(shí)際更為接近,以此指導(dǎo)全橋各階段的施工并實(shí)現(xiàn)對(duì)拼裝過程進(jìn)行有效的控制。
[Abstract]:Bridge-erecting machine is a kind of large mechanical equipment which is assembled at the bridge and then constructed one by one. Prefabricated segmental assembly construction technology is the most common construction method in the construction of bridge erecting machine. The construction of segmental assembly requires several complicated processes, such as the assembling of beam section, the pouring of wet joint concrete, the prestressing tensioning, the dismounting of bridge erecting machine and the system conversion, and so on. The internal force and deformation of the beam are affected by various material factors, Therefore, the study of displacement and stress condition of bridge erector and simply supported beam under different construction conditions and the establishment of detailed construction control scheme not only relate to the safety of the bridge erector itself but also to the final bridge alignment. Based on the research background of the 48 m segment assembling simply supported box girder of Sanyangchuan Bridge on Baolan Line, the development and research status of the segmental assembling construction technology are described in detail in this paper. Then, taking the 48m section of Sanyangchuan Bridge on Baolan Line as an example, the paper introduces the main structure, construction principle and method of the main equipment TP48 segment erection bridge erector, and divides the construction process into the installation of the bridge erector. In the five construction stages of beam block hoisting, wet joint concrete pouring, prestressed tensioning and bridge erecting machine passing through the hole, the finite element software Midas Civil is used as the tool, through the reasonable simplification of the bridge erecting machine, The integral finite element model of bridge erector and concrete simply supported beam is established, and the simulation analysis of construction stage is carried out. The physical behavior of TP48 bridge erector and concrete beam is analyzed. The linear changes of the simply supported concrete beam in each construction stage and the stress of the key control section are obtained in the course of segmental assembly construction. The law of change in the whole construction process is also found out. Based on the guidance of the above theoretical data, according to the characteristics of the construction technology of the 48m section assembly of Sanyangchuan Bridge on Baolan Line, a suitable monitoring scheme is developed, which is used in the construction process of the section assembly. Through the processing of the data collected by the strainer, the measured values of the structures in each construction stage of the segmental assembling construction are obtained. Through the analysis and comparison of the theoretical values and the measured values, the causes of the deviation are found out, and the deviation is corrected. Thus, the model is closer to the reality, which can guide the construction of the whole bridge and realize the effective control of the assembling process.
【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】：2015
【分類號(hào)】：U445.4
本文編號(hào)：2159130
[Abstract]:Bridge-erecting machine is a kind of large mechanical equipment which is assembled at the bridge and then constructed one by one. Prefabricated segmental assembly construction technology is the most common construction method in the construction of bridge erecting machine. The construction of segmental assembly requires several complicated processes, such as the assembling of beam section, the pouring of wet joint concrete, the prestressing tensioning, the dismounting of bridge erecting machine and the system conversion, and so on. The internal force and deformation of the beam are affected by various material factors, Therefore, the study of displacement and stress condition of bridge erector and simply supported beam under different construction conditions and the establishment of detailed construction control scheme not only relate to the safety of the bridge erector itself but also to the final bridge alignment. Based on the research background of the 48 m segment assembling simply supported box girder of Sanyangchuan Bridge on Baolan Line, the development and research status of the segmental assembling construction technology are described in detail in this paper. Then, taking the 48m section of Sanyangchuan Bridge on Baolan Line as an example, the paper introduces the main structure, construction principle and method of the main equipment TP48 segment erection bridge erector, and divides the construction process into the installation of the bridge erector. In the five construction stages of beam block hoisting, wet joint concrete pouring, prestressed tensioning and bridge erecting machine passing through the hole, the finite element software Midas Civil is used as the tool, through the reasonable simplification of the bridge erecting machine, The integral finite element model of bridge erector and concrete simply supported beam is established, and the simulation analysis of construction stage is carried out. The physical behavior of TP48 bridge erector and concrete beam is analyzed. The linear changes of the simply supported concrete beam in each construction stage and the stress of the key control section are obtained in the course of segmental assembly construction. The law of change in the whole construction process is also found out. Based on the guidance of the above theoretical data, according to the characteristics of the construction technology of the 48m section assembly of Sanyangchuan Bridge on Baolan Line, a suitable monitoring scheme is developed, which is used in the construction process of the section assembly. Through the processing of the data collected by the strainer, the measured values of the structures in each construction stage of the segmental assembling construction are obtained. Through the analysis and comparison of the theoretical values and the measured values, the causes of the deviation are found out, and the deviation is corrected. Thus, the model is closer to the reality, which can guide the construction of the whole bridge and realize the effective control of the assembling process.
【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】：2015
【分類號(hào)】：U445.4
【參考文獻(xiàn)】
相關(guān)期刊論文 前1條
1 鄒琳斌;姜海波;危春根;殷武;楊敏;;節(jié)段施工混凝土箱梁接縫抗剪性能有限元分析[J];工業(yè)建筑;2011年11期
，本文編號(hào)：2159130
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