Authors: | Siad, Ibtissem Akchiche, Mustapha Spyridis, Panagiotis |
Title: | Effect of the umbrella arch technique modelled as a homogenized area above a cross passage |
Language (ISO): | en |
Abstract: | The stability of tunnel cross passages excavated in soft soil has always been a major challenge. In recent years, new techniques based on the installation of pre-reinforcements before tunnel excavation have been developed to control excavation-induced deformation and surface settlements. In this paper, a finite element numerical simulation was conducted to study the reduction effect of an umbrella vault element modelled as a homogenized area on the deformations induced after the excavation of a cross passage. The results of this study show that the ground deformations can be controlled efficiently by using this type of pre-reinforcement. However, the findings showed that there is no effect of the umbrella arch length on the reduction of the ground deformations. This paper represents a very good demonstration of 3D modelling of tunnel junctions using pre-support techniques; it is the most advanced/appropriate research tool for studying the behaviour of cross passages and is useful as a paradigm for other researchers and practitioners. |
Subject Headings: | Cross passage Numerical modelling Ground surface settlement Umbrella arch technique Homogenization technique |
Subject Headings (RSWK): | Tunnelbau Verkehrsknotenpunkt Setzung Numerisches Verfahren Finite-Elemente-Methode Dreidimensionales Modell |
URI: | http://hdl.handle.net/2003/41280 http://dx.doi.org/10.17877/DE290R-23122 |
Issue Date: | 2023-01-26 |
Rights link: | https://creativecommons.org/licenses/by/4.0/ |
Appears in Collections: | Fakultät Architektur und Bauingenieurwesen |
Files in This Item:
File | Description | Size | Format | |
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applsci-13-01588-v3.pdf | 5.46 MB | Adobe PDF | View/Open |
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