机场地下穿越工程工后沉降监测及分析

Monitoring and Analysis of Settlement after Construction for Airport Underground Crossing Project

虹桥国际机场于2009年3～4月间实现了上海轨道交通10号线地下穿越工程,成为国内首例不停航条件下采用盾构法下穿繁忙机场跑道的工程。考虑到工后沉降的进一步发展,对穿越工程沿线深层土体变形及道面沉降进行了长期跟踪监测。从监测项目、监测断面选择及测点布设方案三个方面对工后沉降监测方案进行了介绍,并对监测结果进行了分析,结果表明穿越工程施工质量较高,工后沉降控制在合理范围内。有关经验可供相关专业人员参考。

The underground crossing project of Shanghai Metro Line 10 was realized in March ~ April 2009 in Hongqiao International Airport. It is the first project using the shield method underground crossing the busy airport runway under the condition of no stop in China. Considering the further development of settlement after construction, the deformation of deep soil and settlement of runway along the crossing project are required to carry out the long-term tracking and monitoring. The article introduces the after-construction settlement monitoring scheme from three aspects of project monitoring, monitoring section selection and monitoring point arrangement scheme, and analyzes the monitoring result. The result shows that the crossing engineering construction quality is higher and the after-construction settlement control is within the reasonable range. The experience can be referred for the similar projects.