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橋-機耦合效應下連續梁懸臂拼裝主動控制技術

作者：王悅1,曹虹1,孫九春1,朱艷2

作者簡介：

王悅，技術研發員，助理工程師，E-mail: 834133150@qq. com

作者單位：

1.騰達建設集團股份有限公司，上海 201204;2.鹽城市公路事業發展中心，江蘇鹽城 224000

基金項目：

?騰達建設集團股份有限公司重點研發課題（2019-SH-010）

摘要：

為滿足大跨度連續梁不對稱懸臂拼裝施工中結構體系的力學狀態控制要求，保障施工安全和施工質量，以上海軌道交通 10 號線二期跨越 6 號線節點橋為例，針對連續梁單 T 構懸臂拼裝主動控制技術的實際需求，提出基于橋-機耦合效應的 T 構力學狀態內部主動控制技術。基于影響線加載原理，通過建立不同施工階段移動天車荷載下的支點反力影響線力學模型，尋求最有利的移動天車荷載位置；基于超靜定體系支點變位原理，通過研究支點變化高度對支點反力的影響關系進行支點反力調整。實踐表明，在施工中通過移動天車布載控制及支腿反力調整可有效控制結構體系力學狀態在安全范圍內。

關鍵詞：橋梁；連續梁；懸臂拼裝；影響線；加載；主動控制；支點反力；超靜定體系

English：

In order to meet the mechanical state control requirements of the structural system in theasymmetric cantilever assembly construction of large-span continuous beams, and ensure the constructionsafety and quality, taking the node bridge of the second-phase project of Shanghai Rail Transit Line10 across Line 6 as an example, aiming at the actual needs of the active control technology for the singleT-frame cantilever assembly of continuous beams, an internal active control technology for T-framemechanical state based on the bridge-erection crane coupling effect is proposed. Based on the influenceline loading principle, the most favorable position of the moving crown block load is found by establishingthe mechanical model of the fulcrum bearing influence line under the moving crown block load in differentconstruction stages; Based on the principle of fulcrum displacement of statically indeterminate system, thefulcrum bearing is adjusted by studying the relationship between the fulcrum change height and thefulcrum bearing. The practice shows that the mechanical state of the structural system can be effectivelycontrolled within the safe range through the load distribution control of the movable crown block and theadjustment of the leg reaction force during the construction.

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