London is a megacity with a population of just under 10 million people that is increasing. Investment in major infrastructure projects is required to cope with this growth, including the upgrade of existing rail infrastructure. The West Anglia main line project in north London involves upgrading the railway network to meet the demands spawned by the regeneration of the Lea Valley hinterland, catalysed by the redevelopment of the Elizabeth Park (former site of the London 2012 Olympics). The works included upgrade of Tottenham Hale and Northumberland Park stations, and construction of a brand new Meridian Water station and other lineside infrastructure. The project will increase rail capacity, provide better internal mobility and improved links to the city on this congested West Anglia main line, as well as accommodate proposed future plans for Crossrail 2 between London and Stansted airport. The project will also unlock housing development and economic growth in the boroughs of Enfield, Haringey and Waltham Forest. This paper presents a geotechnical perspective of the project and discusses the ground conditions, design and construction of the trackbed and substructures for bridges, overhead line equipment and station upgrade works. This will leave a legacy for future designers of upgrade and extension works.

中文翻译：

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西英吉利干线升级–从岩土工程的角度

伦敦是一个大城市，人口不足一千万，而且还在不断增加。为了应对这种增长，包括对现有铁路基础设施的升级，需要对主要基础设施项目进行投资。伦敦北部的西英吉利干线项目涉及升级铁路网络，以满足因伊丽莎白公园（伦敦2012年伦敦奥运会的旧址）的重建而引起的利河谷腹地再生所产生的需求。工程包括托特纳姆黑尔和诺森伯兰公园站的升级，以及建设全新的子午水站和其他沿线基础设施。该项目将在这条拥挤的西安格利亚干线增加铁路运力，提供更好的内部流动性并改善与城市的联系，以及容纳伦敦和斯坦斯特德机场之间的Crossrail 2的拟议未来计划。该项目还将释放恩菲尔德，哈林基和沃尔瑟姆森林区的住房发展和经济增长。本文介绍了该项目的岩土工程学观点，并讨论了地面条件，桥梁的轨道床和下部结构的设计和施工，架空线设备以及车站的升级工程。这将为将来的升级和扩展工作设计师留下遗产。桥梁，架空线设备和车站升级工程的轨道床和下部结构的设计和施工。这将为将来的升级和扩展工作设计师留下遗产。桥梁，架空线设备和车站升级工程的轨道床和下部结构的设计和施工。这将为将来的升级和扩展工作设计师留下遗产。