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Class A prediction of mechanised tunnelling in Rome

机译：罗马机械隧道的A级预测

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摘要

Contract T3 of Line C of Rome underground, currently under construction, crosses the archaeological area of the historical centre, with significant interferences with the existing monumental built environment. A fully instrumented green field control section was established at the beginning of this contract, in representative ground conditions. This paper presents a thorough Class A prediction of the passage of the tunnels through the control section, obtained using a recently developed advanced numerical procedure. The ground was modelled with a non-linear constitutive law, calibrated with all the available data from the geotechnical investigation. The main physical processes occurring around the shield, including cutter-head overcut, shield tapering and tail void grouting were modelled in detail. The numerical results agree qualitatively with the findings from well documented case histories and results from physical models. The installed instrumentation will provide an opportunity to test the ability of the adopted procedure to reproduce quantitatively the measured performance, once the tunnels will cross the control sections and the field data will become available.
机译：目前正在建设中的罗马地下C线T3合同穿越历史中心的考古区，对现有的巨大建筑环境产生了重大干扰。在本合同开始时，在具有代表性的地面条件下，建立了一个配备齐全的绿地控制部门。本文介绍了使用最新开发的高级数值程序获得的对隧道通过控制段的彻底A类预测。使用非线性本构定律对地面进行建模，并使用岩土工程研究提供的所有可用数据进行校准。详细模拟了盾构周围发生的主要物理过程，包括刀头过切，盾构渐缩和尾部空隙灌浆。数值结果与充分记录的案例历史和物理模型的结果在质量上一致。一旦隧道越过控制段并且现场数据将可用，已安装的仪器将提供机会来测试所采用程序的能力，以定量地再现所测量的性能。

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