石拱桥检测评估与养护对策应用技术研究

发布时间：2018-03-14 07:27

本文选题：石拱桥　切入点：检测评估　出处：《重庆交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：石拱桥在我国特别是西南山区应用非常广泛,石拱桥是我国出现较早的桥型,其因具有诸多优点在桥梁史上取得了不菲的成就。然而,随着时间的推移,在时间、荷载、气候环境的影响作用下,许多石拱桥已出现结构破坏、材料劣化、耐久性不足和承载能力降低等各种不利现象,严重影响了石拱桥的正常运营,危及人民生命安全。因此,运用科学合理的方法对石拱桥的健康状况进行客观而准确的检测评估,及时发现并处理存在的安全隐患,对石拱桥进行及时合理的养护管理都是亟待解决的问题。本文探索采用《公路桥梁技术状况评定标准》(JTG/T H21-2011)推荐的分层综合评定与五类桥梁单项控制指标相结合的方法,建立服役石拱桥的健康状况评估模型,分析确定服役石拱桥的运营情况,结合重庆市的百节桥和团结桥两座石拱桥为具体研究对象进行了研究,并提供石拱桥管理、维修、养护工作提供科学依据。主要研究内容包括:(1)基于石拱桥主体结构及其附属构造物病害和损伤全面细致、深入的检查结果,推定病害或潜在病害和损伤的部位、性质、严重程度及发展趋势,分析缺损产生的主要原因。(2)基于《公路桥梁技术状况评定标准》(JTG/T H21-2011)推荐的分层综合评定与五类桥梁单项控制指标相结合的方法,对石拱桥技术状况进行全面检查和评定,在综合评定法的基础上,针对石拱桥这种特定桥型,从结构重要性、病害发展状况、岩石成分、岩石结构及裂隙发育程度、所处气候、所处地形等六方面进行权重细化,得到石拱桥更为真实的技术状况。(3)依据综合评定法所得的石拱桥技术状况评分,确定石拱桥的技术状况等级,分析和评价缺损对石拱桥质量状况的影响,对石拱桥需进行特殊检查的必要性进行了分析,提出石拱桥相应养护管理对策。(4)将分层综合评定与五类桥梁单项控制指标相结合的评定方法应用于百节桥和团结桥的工程实践。结合两座桥的评定数据,检验本文提出的综合评定法评定石拱桥的技术状况等级。结果表明:本文提出的综合评定法对石拱桥的评定是可行的、有效的。
[Abstract]:Stone arch bridge is widely used in our country, especially in southwest mountainous area. Stone arch bridge is an early bridge type in our country, and it has made great achievements in the bridge history because of its many advantages. However, with the passage of time, time and load, Under the influence of climate and environment, many stone arch bridges have appeared various adverse phenomena, such as structural damage, deterioration of materials, insufficient durability and reduced bearing capacity, which seriously affected the normal operation of stone arch bridges and endangered the lives of people. By using scientific and reasonable methods, the health condition of stone arch bridge is detected and evaluated objectively and accurately, and the hidden danger of safety is found and dealt with in time. The timely and reasonable maintenance and management of stone arch bridge is an urgent problem to be solved. In this paper, the method of combining the stratified comprehensive evaluation recommended by JTG / T H21-2011 with the single control index of five types of bridges is explored in this paper. This paper establishes the health assessment model of the stone arch bridge in service, analyzes and determines the operation situation of the stone arch bridge in service, studies the two stone arch bridges in Chongqing, including the Baijie Bridge and the Unity Bridge, and provides the management and maintenance of the stone arch bridge. Maintenance work provides scientific basis. The main research contents include: (1) based on the comprehensive and meticulous inspection results of the main structure of the stone arch bridge and its subsidiary structure and damage, the location and nature of the disease or potential disease and injury are deduced. The degree of severity and the development trend, the main cause of the defect is analyzed. The method of combining the stratified comprehensive evaluation with the single control index of five types of bridges, which is based on the Evaluation Standard of Technical condition of Highway Bridges (JTG / T H21-2011), is proposed. The technical condition of stone arch bridge is inspected and evaluated in an all-round way. On the basis of comprehensive evaluation method, according to the specific bridge type of stone arch bridge, the structure importance, disease development condition, rock composition, rock structure and crack development degree, the climate of stone arch bridge are analyzed. The weight of the stone arch bridge is refined in six aspects, such as the terrain, and the more true technical condition of the stone arch bridge is obtained. The technical status of the stone arch bridge is evaluated according to the comprehensive evaluation method, and the technical status grade of the stone arch bridge is determined. This paper analyzes and evaluates the influence of defects on the quality of stone arch bridge, and analyzes the necessity of special inspection of stone arch bridge. The corresponding maintenance and management countermeasure of stone arch bridge is put forward. (4) the assessment method combining stratified comprehensive assessment with five kinds of single control index of bridge is applied to the engineering practice of hundred node bridge and solidarity bridge, and the evaluation data of two bridges are combined. The comprehensive evaluation method proposed in this paper is used to evaluate the technical status of the stone arch bridge. The results show that the comprehensive evaluation method proposed in this paper is feasible and effective for the evaluation of the stone arch bridge.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U446;U445.7

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