既有运营枢纽下深惠城际深圳北站增层改扩建关键技术

Key Technologies for Underground Layer Addition and Structural Expansion of Shenzhen North Station of Shenzhen-Huizhou Intercity Railway under the Existing Operating Hub

摘要: 深圳北站是深圳铁路枢纽“三主四辅”中的“三主”之一，衔接有国铁、深惠城际和城市轨道交通4、5、6号线，是深圳市的重要综合交通枢纽。深惠城际深圳北站的客流需求大，远期车站旅客乘降量达到15.4万人次/日，基于既有车站对其进行向下增层改扩建，使其实现国铁、城际和城市轨道交通“零换乘”具有极大的社会经济效益。文章从改扩建工程中施工空间有限、开挖改变既有桩基受力平衡以及施工需要保护周边建筑物安全等施工难题出发，结合深惠城际深圳北站工程总结了窄小空间增层下挖关键技术，并通过数值方法优化施工流程，保证了施工安全、合理、高效进行，为未来运营枢纽下既有车站改造扩建项目提供技术支撑。

Abstract: Shenzhen North Railway Station is one of the “three main” hubs in the “three main, four auxiliary” structure of the Shenzhen railway network. It connects the national railway, the Shenzhen-Huizhou intercity railway, and urban rail transit lines 4, 5, and 6, making it an important comprehensive transportation hub in Shenzhen. With a significant passenger demand at Shenzhen North Station for the Shenzhen-Huizhou intercity line, the future passenger flow at the station is expected to reach 154,000 passengers per day. Expanding and reconstructing the existing station by adding underground levels to achieve seamless transfers between national rail, intercity rail, and urban rail transit brings immense socio-economic benefits. This paper addresses the key construction challenges posed by limited construction space, excavation impacting the load balance of existing foundations, and the need to ensure the safety of surrounding buildings. It summarizes the critical technologies for adding levels and excavation in confined spaces in the Shenzhen North Station project for the Shenzhen-Huizhou intercity line. Through numerical methods, the construction process was optimized to ensure safe, efficient, and reasonable execution, providing technical support for future reconstruction and expansion projects of stations under operational hubs.