既有混凝土橋梁的狀態(tài)評定與維修加固
發(fā)布時間:2018-06-05 05:00
本文選題:既有橋梁 + 檢測。 參考:《湖南大學》2015年碩士論文
【摘要】:隨著經濟的發(fā)展,交通運輸任務不斷加大,交通運輸日益朝著高速、重載發(fā)展,既有公路橋梁的損傷勢必隨之加大,特別是上個世紀50~70年代在我國公路沿線上建造的裝配式梁橋、雙曲拱橋。為了保障老路線的安全暢通,對既有橋梁技術狀況和承載能力做出科學評價,為橋梁的日常養(yǎng)護維修和加固改造提供科學的決策依據,具有極高的價值。針對這種情況,本文主要完成了以下工作:(1)闡述橋梁承載能力評定的方法,概述了橋梁技術狀態(tài)評定的基本原理,通過將橋梁上部結構、下部結構以及橋面系單獨評分,然后結合各部位在全橋中的權重得到橋梁的總體技術評分,進而對橋梁總體技術狀態(tài)進行分級。(2)根據現(xiàn)場檢測、靜載試驗以及理論分析,對湖南省境內兩座舊橋—金剛頭橋(簡支T梁橋)和鎮(zhèn)頭大橋(雙曲拱橋)進行了承載能力評定,評定結果為:金剛頭橋的橋梁總體技術狀況評定為4類,鎮(zhèn)頭大橋的橋梁總體技術狀況評定為3類。(3)兩座橋梁既有的病害已經影響到橋梁的結構安全,基于現(xiàn)場調查和檢測,提出了金剛頭橋和鎮(zhèn)頭大橋的加固方案,可為同類橋加固提供參考和借鑒。
[Abstract]:With the development of economy and the increasing traffic and transportation tasks, the traffic and transportation are increasingly moving towards high speed and heavy load development, the damage of existing highway bridges is bound to increase, especially the assembly beam bridge built along the road of our country in the 50~70 years of the last century, the double curved arch bridge. It is of great value to provide scientific decision basis for the daily maintenance and reinforcement of the bridge. In this case, the following work has been completed in this paper: (1) the method of assessing the bearing capacity of the bridge is expounded, the basic principle of bridge beam technical state evaluation is summarized, and the upper part of the bridge is taken to the upper part of the bridge. The structure, the substructure and the bridge deck are graded separately, and then the overall technical score of the bridge is graded according to the weight of each part in the full bridge. And then the overall technical state of the bridge is classified. (2) according to the field testing, static load test and theoretical analysis, the two old bridges in Hunan Province, the Jin Gang head bridge (Jane T beam bridge) and the town head bridge ( The evaluation results of the bearing capacity of the double curved arch bridge are as follows: the overall technical status of the bridge of the Jin Gang head bridge is evaluated as 4 categories, and the overall technical status of the bridge of the town head bridge is evaluated as 3. (3) the existing diseases of the two bridges have affected the structural safety of the bridge. Based on the present field investigation and detection, the golden head bridge and the town head bridge are put forward. The reinforcement scheme can provide reference for similar bridge reinforcement.
【學位授予單位】:湖南大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:U445.7
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