三峡库区石拱桥的加固保护
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摘要
我国古石拱桥特别是三峡库区的石拱桥以其悠久的历史和卓越的成就,在世界桥梁史中享有盛名。然而由于各种原因,现存的桥梁大都遭到不同程度的损坏。如何对这些石拱桥进行有效的保护是当前亟待解决的问题。本文主要探讨三峡库区古石桥保护加固中的具体措施与方法,以及在实际保护当中的可行性及保护效果。
本文首先详尽阐述石拱桥的起源、发展、构造、分类、施工方法;系统分析古石拱桥存在的病害及其成因;分析古石拱桥的破坏形式以及产生破坏的因素。在此基础上,提出相应的加固保护措施及实施方法。
以清陆安桥异地迁建实际工程为例,探讨在古代石桥保护加固应用中的具体措施与方法,及其在实际保护工作中的可行性及其保护效果。
针对异地迁建加固的陆安桥建立整体分析有限元模型,通过数值计算研究其受力特性及变形能力,对其安全性进行评估。计算分析表明,加固后混凝土拱承担了大部分荷载,石拱不再起主要承重作用,达到了设计目的。
本文提出的具体加固措施对三峡库区石拱桥整体搬迁保护是一种行之有效的方法,对该地区其他石拱桥的保护具有一定的参考价值。
China's ancient stone arch bridge has a long history and outstanding achievements. In the world it has a reputation in the history of bridge, especially in the Three Gorges reservoir area for the stone arch bridge. Most of the existing bridges were damaged to varying degrees for various reasons. Therefore, it is a serious problem how to protect these stone arch bridges effectively. Specific measures and methods on protecting the ancient stone bridge in the Three Gorges reservoir area and the feasibility and effect in the practical protection were mainly discussed in this paper.
The origin, development, structural components, construction methods of the ancient stone arch bridge were firstly elaborated on in this paper. The existing destruction and the causes of the stone arch bridge as well as destabilizing factors were analyzed. On this basis, the specific protective measures and the reinforcement methods were proposed.
An actual project- the relocation of of Qing Dynasty was taken for example. Specific measures and methods on protecting the ancient stone bridge and the feasibility and effect in the practical protection were mainly discussed in this paper.
The finite element analysis model was established for LuAn bridge relocated. Its capacity of being forced and deformation was studied through computation and its safety was assessed. The results show that the reinforced concrete arch bears the majority of loading and stone arch no longer plays a major role in bearing the load. The aims designed was achieved.
The proposed concrete measures to reinforce the Three Gorges reservoir area on the relocation of the overall protection of stone arch bridge is an effective way to other stone arch bridge in the area of protection of certain reference value.
Specific measures and methods proposed in this paper were well applied to protect the ancient stone bridge in the Three Gorges reservoir area. It has certain reference value to protecting other stone arch bridge in the area.
本文首先详尽阐述石拱桥的起源、发展、构造、分类、施工方法;系统分析古石拱桥存在的病害及其成因;分析古石拱桥的破坏形式以及产生破坏的因素。在此基础上,提出相应的加固保护措施及实施方法。
以清陆安桥异地迁建实际工程为例,探讨在古代石桥保护加固应用中的具体措施与方法,及其在实际保护工作中的可行性及其保护效果。
针对异地迁建加固的陆安桥建立整体分析有限元模型,通过数值计算研究其受力特性及变形能力,对其安全性进行评估。计算分析表明,加固后混凝土拱承担了大部分荷载,石拱不再起主要承重作用,达到了设计目的。
本文提出的具体加固措施对三峡库区石拱桥整体搬迁保护是一种行之有效的方法,对该地区其他石拱桥的保护具有一定的参考价值。
China's ancient stone arch bridge has a long history and outstanding achievements. In the world it has a reputation in the history of bridge, especially in the Three Gorges reservoir area for the stone arch bridge. Most of the existing bridges were damaged to varying degrees for various reasons. Therefore, it is a serious problem how to protect these stone arch bridges effectively. Specific measures and methods on protecting the ancient stone bridge in the Three Gorges reservoir area and the feasibility and effect in the practical protection were mainly discussed in this paper.
The origin, development, structural components, construction methods of the ancient stone arch bridge were firstly elaborated on in this paper. The existing destruction and the causes of the stone arch bridge as well as destabilizing factors were analyzed. On this basis, the specific protective measures and the reinforcement methods were proposed.
An actual project- the relocation of of Qing Dynasty was taken for example. Specific measures and methods on protecting the ancient stone bridge and the feasibility and effect in the practical protection were mainly discussed in this paper.
The finite element analysis model was established for LuAn bridge relocated. Its capacity of being forced and deformation was studied through computation and its safety was assessed. The results show that the reinforced concrete arch bears the majority of loading and stone arch no longer plays a major role in bearing the load. The aims designed was achieved.
The proposed concrete measures to reinforce the Three Gorges reservoir area on the relocation of the overall protection of stone arch bridge is an effective way to other stone arch bridge in the area of protection of certain reference value.
Specific measures and methods proposed in this paper were well applied to protect the ancient stone bridge in the Three Gorges reservoir area. It has certain reference value to protecting other stone arch bridge in the area.
引文
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[36]CECS146:2003,碳纤维片材加固混凝土结构技程[S],
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[42]张秉坚,铁景沪.古建筑与石质文物的清洗技术[J],清洗世界,2004.5
[43]朱伯芳.有限单元法原理与应用[M].北京.中国水利水电出版社,1998
[44]袁海军,姜红等.建筑结构检测鉴定与加固手册[M],北京,中国建筑工业出版社,2003
[45]任伟.碳纤维布对RC梁抗剪加固研究[D],长安大学硕士学位论文,2003.5
[46]刘其卓.碳纤维布加固不同损伤混凝土梁抗弯性能的试验研究[D],武汉理工大学硕士学位论文,2004.11
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[48]高戈.碳纤维加固混凝土梁、板结构研究[D],浙江大学硕士学位论文,2003.3
[49]周建波.碳纤维加固空心板梁试验研究[D],长安大学硕士学位论文,2004.5
[50]吴志平.外贴碳纤维材料加固混凝土构件的力学性能及工程应用[D],合肥工业大学硕士学位论文,2003.2
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