Refurbishment of the old Medway Bridge
Refurbishment of the old Medway Bridge
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旧梅德韦桥整修
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
D. A. Smith
中科院分区：
文献类型：
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作者：
G. Parke;P. Disney;D. A. Smith
最初的Medway大桥由21跨预应力混凝土梁和双三室箱梁结构组成，全长近1公里，主跨152.4米。它承载着英国肯特梅德威河上的M2高速公路的两条车道。2002年8月，作为公路局A2/M2 Cobham至4号交叉口拓宽计划的一部分，新的Medway大桥开通，现有桥梁上的所有交通暂时改道，让Costain-Skanska-Mowlem合资企业（CSM）完全进入高架桥上部结构，开始结构翻新的最后阶段。本文详细介绍了一些最终翻修要求的设计，并确定了为克服加固过程中现场遇到的几个问题而制定的解决方案。主要工程项目包括更换河上的一座悬跨，修复支撑预应力混凝土半接头，并重新评估高架桥。这项工作是根据设计和建造合同完成的，这使得对经济和可建造细节的需求更加迫切。重点是制定灵活的解决方案，以满足现场的预期变化。有关覆盖摘要，请参见ITRD E126028。
The original Medway Bridge comprises 21 spans of prestressed concrete beams and twin three-cell box girder construction with an overall length of almost 1 kilometre and a main span of 152.4 m. It carried both carriageways of the M2 motorway over the River Medway in Kent, UK. With the opening of the new Medway Bridge in August 2002 as part of the A2/M2 Cobham to Junction 4 widening scheme for the Highways Agency, all traffic on the existing bridge was temporarily diverted giving Costain-Skanska-Mowlem joint venture (CSM) full access to the viaduct superstructure to begin the final phase of the structural refurbishment. This paper details the design of some of the final refurbishment requirements and identifies the solutions developed to overcome several problems encountered on site during the strengthening. Key items of work included replacing a suspended span over the river, repairing the supporting prestressed concrete half joints and re-assessing the approach viaducts. The work was completed under a Design and Build contract, which made the need for economic and buildable details all the more acute. Emphasis was placed on the development of flexible solutions to cater for anticipated variations on site. For the covering abstract see ITRD E126028.