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介绍首都机场线T2支线采用盾构法施工下穿机场滑行区和P4停机坪的情况,阐述第三方监测的目的、内容、方法及测点布设原则,对监测成果进行分析。结果表明,停机坪变形控制达到预期效果,盾构隧道的安全贯通得到保证。总结停机坪的变形特性及规律,从而为今后类似重大风险源的监测设计和施工提供参考和指导。
This article introduces the situation of the T2 line of the Capital Airport under construction using the shield construction under the airport taxi zone and the P4 apron, and elaborates the purpose, contents and methods of the third party monitoring and the principle of the layout of the measuring points, and analyzes the monitoring results. The results show that the apron deformation control has achieved the expected results, and the safety of the shield tunnel is guaranteed. Summarizes the deformation characteristics and regularity of the apron and thus provides reference and guidance for monitoring design and construction of similar major risk sources in the future.