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首页> 外文会议>Geo-congress >Evaluation of the Efficiency of the Umbrella Arch Method in Urban Tunneling Subjected to Adjacent Surcharge Loads
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Evaluation of the Efficiency of the Umbrella Arch Method in Urban Tunneling Subjected to Adjacent Surcharge Loads

机译：评估邻近附加载荷的城市隧道伞梁法的效率

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摘要

Since urban tunnels constructed in the weak ground at shallow depth are highly sensitive to the stress level, surcharge loads resulting from adjacent buildings can dramatically increase the induced stresses and settlements, and even failure of the buildings can take place. In this study, utilizing three-dimensional finite element models, the efficiency of the umbrella arch method (UAM) on stabilizing the tunnels subjected to the surcharge loading is investigated. The analysis considers the actual field conditions of implementing the UAM and the primary supporting system. For the surcharge loads applied in this study, the analysis results showed that using the UAM can efficiently control the tunnel crown and ground surface settlements by at least 48% and 33%, respectively. Consequently, reinforcing the tunnels using UAM is one of the effective ways to overcome the severe conditions, in terms of safety and stability, in urban tunneling under existing adjacent buildings.
机译：由于在浅层的浅层地面构造的城市隧道对应力水平高度敏感，因此由相邻建筑物产生的附加费载荷可以显着增加诱导的应力和沉降，甚至可以发生建筑物的失败。在该研究中，利用三维有限元模型，研究了伞弓法（UAM）对稳定经过附加额荷载量的隧道的效率。分析考虑实现UAM和主要支持系统的实际现场条件。对于在本研究中应用的附加载量，分析结果表明，使用UAM可以将隧道冠和地面沉降分别有效地控制至少48％和33％。因此，使用UAM加强隧道是在现有邻近建筑物下的城市隧道中克服严重条件的有效方法之一。

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