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Geotechnical and Geological Engineering

Erschienen in:

23.01.2022 | Original Paper

The Effect of Tunnel Geometry and Geomechanical Parameters of Host Rock on Tunnel Displacement Profile

verfasst von: Mohammad Ghaffari, Saeed Mahdevari

Erschienen in: Geotechnical and Geological Engineering | Ausgabe 5/2022

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Abstract

Examination of tunnel displacement profile is one of the basic requirements in tunnel design which controls the internal forces of the lining and the surface settlements. The previous studies on the tunnel displacement profile have been in the form of elastic analysis and do not consider changes in the overburden and geomechanical parameters of the host rock. Therefore, using three-dimensional numerical simulation, this study has investigated the effect of tunnel diameter, overburden and geomechanical parameters of the host rock on the tunnel displacement profile. The results of analysis showed that the average displacement occurred in the face for diameters of 7 and 10 m was 27 and 26% of total displacement, respectively, and its value was directly related to cohesion and inversely related to overburden. The tunnel overburden as well as its diameter are the main factors in determining the location where 5 and 95% of total displacement take place while cohesion influences only the 5% location of total displacement while the deformation modulus had no effect on the displacement profile. The displacement profile proposed by Hoek was fitted to the profile extracted from numerical simulation. The relationship between the overburden, diameter, and geomechanical parameters of the host rock and the fixed coefficients of the proposed Hoek function was also evaluated, and equations were proposed to estimate the fixed coefficients of the function.

Vorheriger Artikel Effect of Love Wave Propagation on the Equivalent Seismic Bearing Capacity of Shallow Foundations Using 3D Coulomb Failure Mechanism

Nächster Artikel Study on the Cracking and Penetration Effect of Liquid Carbon Dioxide Phase Transition

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Titel: The Effect of Tunnel Geometry and Geomechanical Parameters of Host Rock on Tunnel Displacement Profile
verfasst von: Mohammad Ghaffari
Saeed Mahdevari
Publikationsdatum: 23.01.2022
Verlag: Springer International Publishing
Erschienen in: Geotechnical and Geological Engineering / Ausgabe 5/2022
Print ISSN: 0960-3182
Elektronische ISSN: 1573-1529
DOI: https://doi.org/10.1007/s10706-022-02063-3

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