發(fā)布時間：2018-05-09 11:20

  本文選題：預(yù)應(yīng)力混凝土 + 斜拉橋��； 參考：《公路》2017年02期

【摘要】：由于大跨徑混凝土斜拉橋跨度大,施工周期長,建筑高度高,施工技術(shù)難度大,通常跨越江、河、湖泊等復(fù)雜的地形、地貌,傳統(tǒng)的支架搭設(shè)施工已不適應(yīng)此類橋梁的正常施工。為了不影響施工工期和當(dāng)?shù)氐沫h(huán)境,通常采取前支點掛籃施工。隨著橋梁結(jié)構(gòu)型式、施工特點及具體控制內(nèi)容的不同,其施工方法也各不相同。總的來講,橋梁施工監(jiān)控可分為開環(huán)控制法、閉環(huán)控制法、自適應(yīng)控制法、最大寬容度法等。以廣東省韶關(guān)市烏石北江特大橋為工程背景,闡述自適應(yīng)控制法在大跨度預(yù)應(yīng)力混凝土斜拉橋前支點掛籃懸臂施工監(jiān)控中的應(yīng)用,通過實際控制及最終結(jié)論結(jié)合具體應(yīng)用方法為同類型橋梁的分析與控制提供借鑒。研究結(jié)果表明,本橋獲得了理想的幾何線形及合理的內(nèi)力狀態(tài),主梁的線形、索力及應(yīng)力狀態(tài)都滿足設(shè)計及規(guī)范要求。自適應(yīng)施工控制方法能較好地指導(dǎo)本橋的施工監(jiān)控工作,因而是一種行之有效的監(jiān)控方法,可在類似橋梁施工監(jiān)控中推廣使用。
[Abstract]:Due to the long span, long construction period, high building height and difficult construction technology, long-span concrete cable-stayed bridges usually span rivers, rivers, lakes and other complicated topography and landforms. The traditional support erection construction is not suitable for the normal construction of this kind of bridge. In order not to affect the construction period and local environment, usually use the front fulcrum hanging basket construction. With the difference of bridge structure type, construction characteristic and concrete control content, its construction method is different. In general, bridge construction monitoring can be divided into open-loop control method, closed-loop control method, adaptive control method, maximum tolerance method and so on. Based on the engineering background of Wushi Beijiang Bridge in Shaoguan City, Guangdong Province, the application of adaptive control method in the construction monitoring of cantilever cantilever in front of long-span prestressed concrete cable-stayed bridge is described. Through the practical control and the final conclusion combined with the specific application of the method to provide reference for the analysis and control of the same type of bridge. The results show that the ideal geometric shape and reasonable internal force state of the bridge are obtained, and the linear, cable force and stress state of the main beam meet the requirements of the design and code. The adaptive construction control method can guide the construction monitoring work of the bridge, so it is an effective monitoring method and can be widely used in the similar bridge construction monitoring.
【作者單位】： 山東交通職業(yè)學(xué)院;山東華鑒工程檢測有限公司;濰坊市公路勘察設(shè)計院;
【分類號】：U445.4

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本文編號：1865825