Seismic behaviour of shallow cut-and-cover tunnels

IF 3.3 2区工程技术 Q2 ENGINEERING, GEOLOGICAL

Soils and Foundations Pub Date : 2025-04-07 DOI:10.1016/j.sandf.2025.101612

Zhengyao He, Nicolas G.L.H. Lee, S.P. Gopal Madabhushi

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引用次数: 0

Abstract

With increased demand for urban space, there is a growing propensity to move urban lifeline systems such as Metro systems and utilities to shallow, cut-and-cover tunnels. The seismic behaviour of such rectangular tunnels is important as these systems need to remain operational in the period after the earthquake for emergency rescue & recovery operations. In this paper, the main focus will be on determining the seismic response of shallow, rectangular tunnels that are buried in loose dry or saturated sand layers, and clay layers with different undrained shear strengths. The results from four centrifuge testing campaigns will be presented. The dynamic responses of the tunnel and soil will be compared to the input motion. The tunnel movements and soil deformations during seismic loading were obtained using high-resolution, high-speed imaging in combination with GeoPIV-RG software. Finally, conclusions will be drawn on the effects of the soil strata through which the tunnel passes, based on these centrifuge data that simulate the most critical geological conditions.

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浅挖盖隧道的地震特性

随着对城市空间需求的增加，越来越多的人倾向于将城市生命线系统（如地铁系统和公用事业）转移到浅挖隧道。这种矩形隧道的地震性能很重要，因为这些系统需要在地震后的一段时间内保持运行，以便进行紧急救援。恢复操作。在本文中，主要的重点将是确定浅埋矩形隧道的地震反应，这些隧道埋在松散的干燥或饱和的砂层中，以及具有不同不排水抗剪强度的粘土层中。将介绍四次离心机测试活动的结果。隧道和土体的动力响应将与输入运动进行比较。利用高分辨率、高速成像技术，结合GeoPIV-RG软件，获得了地震荷载作用下隧道运动和土体变形。最后，根据这些模拟最关键地质条件的离心机数据，将得出隧道所经过的土壤地层的影响的结论。

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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来源期刊

Soils and Foundations 工程技术-地球科学综合

CiteScore

6.40

自引率

8.10%

发文量

审稿时长

5 months

期刊介绍： Soils and Foundations is one of the leading journals in the field of soil mechanics and geotechnical engineering. It is the official journal of the Japanese Geotechnical Society (JGS)., The journal publishes a variety of original research paper, technical reports, technical notes, as well as the state-of-the-art reports upon invitation by the Editor, in the fields of soil and rock mechanics, geotechnical engineering, and environmental geotechnics. Since the publication of Volume 1, No.1 issue in June 1960, Soils and Foundations will celebrate the 60th anniversary in the year of 2020. Soils and Foundations welcomes theoretical as well as practical work associated with the aforementioned field(s). Case studies that describe the original and interdisciplinary work applicable to geotechnical engineering are particularly encouraged. Discussions to each of the published articles are also welcomed in order to provide an avenue in which opinions of peers may be fed back or exchanged. In providing latest expertise on a specific topic, one issue out of six per year on average was allocated to include selected papers from the International Symposia which were held in Japan as well as overseas.