既有混凝土桥梁的状态评定与维修加固

发布时间：2018-06-05 05:00

本文选题：既有桥梁 + 检测　；参考：《湖南大学》2015年硕士论文

【摘要】：随着经济的发展,交通运输任务不断加大,交通运输日益朝着高速、重载发展,既有公路桥梁的损伤势必随之加大,特别是上个世纪50~70年代在我国公路沿线上建造的装配式梁桥、双曲拱桥。为了保障老路线的安全畅通,对既有桥梁技术状况和承载能力做出科学评价,为桥梁的日常养护维修和加固改造提供科学的决策依据,具有极高的价值。针对这种情况,本文主要完成了以下工作:(1)阐述桥梁承载能力评定的方法,概述了桥梁技术状态评定的基本原理,通过将桥梁上部结构、下部结构以及桥面系单独评分,然后结合各部位在全桥中的权重得到桥梁的总体技术评分,进而对桥梁总体技术状态进行分级。(2)根据现场检测、静载试验以及理论分析,对湖南省境内两座旧桥—金刚头桥(简支T梁桥)和镇头大桥(双曲拱桥)进行了承载能力评定,评定结果为:金刚头桥的桥梁总体技术状况评定为4类,镇头大桥的桥梁总体技术状况评定为3类。(3)两座桥梁既有的病害已经影响到桥梁的结构安全,基于现场调查和检测,提出了金刚头桥和镇头大桥的加固方案,可为同类桥加固提供参考和借鉴。
[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.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.7

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