盾构隧道下穿机场的结构设计与施工沉降控制研究

随着机场为核心的城市综合交通枢纽、机场捷运系统的发展，地下结构下穿机场的工程逐渐增多。现以某机场捷运工程盾构下穿运营飞机滑行道为背景，对盾构隧道下穿机场的重点问题进行研究。通过对飞机荷载的合理等效计算，确定盾构埋深与飞机荷载取值的关系。结合工程实例，对下穿滑行道盾构管片进行受力分析并提出构造措施。研究盾构埋深及地层损失率对机场道面沉降的影响，总结控制盾构沉降的相关措施。

Study on Structure Design and Settlement Control of Shield Tunnel Undercrossing Airport

With the development of the airport as the core of urban integrated transportation hub and airport MRT system, the projects of underground structures undercrossing airport are gradually increasing. Taking an airport MRT engineering shield undercrossing aircraft taxiway as the background, some key problems of shield tunneling under the airport are studied. Through the reasonable equivalent calculation of aircraft load, the relationship between the buried depth of shield and the load value of aircraft is determined. Combined with the engineering example, the stress analysis on the shield segment undercrossing the taxiway is carried out and the structural measures are proposed. The influences of the buried depth of the shield and the rate of ground loss on the airport pavement settlement are studied. The relevant measures to control the shield settlement are summarized.