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地基沉降问题是软土地基上修建跑道的关键问题,上海浦东机场对修建在软土地基上的跑道进行了长期道面沉降观测。通过对浦东机场两条跑道道面沉降观测资料的分析,提出了采用通航以来跑道横断面上10 m线测点与30 m线测点之间的差异沉降近似确定飞机动载沉降的方法,并分析了飞机动载沉降在时间及空间上的变化规律。认为动载沉降在通航初期2～3年增加较大、之后增加缓慢,动载沉降占总沉降的份额随着时间的延续不断增大,一跑道通航10年后,该份额平均约为10%左右。截止2009年4月,浦东机场一、二跑道以均匀沉降为主,差异沉降较小。
The settlement of foundation is a key issue in the construction of runway on soft soil foundation. Shanghai Pudong Airport conducted long-term pavement settlement observation on the runway constructed on soft ground. Based on the analysis of the data of surface settlement of two runways in Pudong Airport, this paper presents a method to determine the dynamic settlement of aircraft using the differential settlement between the 10 m line and the 30 m line in the runway cross section The change rule of the moving settlement of the aircraft in time and space is analyzed. It is considered that the dynamic settlement has increased greatly in the first 2-3 years of navigation, and then increased slowly. The share of dynamic settlement in the total settlement has been increasing with time. After 10 years of runway navigation, the share is about 10% about. As of April 2009, the first and second runways of Pudong Airport will be dominated by uniform settlement, with less differential settlement.