小间距双线隧道对既有隧道变形的影响

2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR) Pub Date : 2021-11-06 DOI:10.1109/ICHCESWIDR54323.2021.9656286

P. Hu, Y. Teng, Meng Li, Liang Ma

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引用次数: 0

摘要

采用MIDSA/ GTS软件对双轨平行盾构结构进行仿真。研究了不同小净距下双线盾构施工对既有隧道的影响，总结了既有隧道的位移和塑性区发展规律。分析表明，后续盾构开挖将引起既有隧道的间隙扩大和拱顶沉降，仰拱的上拔变形和隧道围岩塑性区将进一步增大。当清晰距离仅为0时。8倍隧道直径，需采取加固措施。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Effect of double track tunnel with small distance on existing tunnel deformation

MIDSA/ GTS software is used to simulate the double track parallel shield construction. The influence of double track shield construction on the existing tunnel under different small clear distance is studied, and the displacement and plastic zone development law of the existing tunnel are summarized. The analysis shows that the subsequent shield excavation will cause the clearance expansion and vault subsidence of the existing tunnel, and the uplift deformation of the inverted arch and the plastic zone of the surrounding rock of the tunnel will further become larger. When the clear distance is only 0. 8 times the tunnel diameter, reinforcement measures need to be taken.

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来源期刊

2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)

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