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Keywords: tunnel
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Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-251
... ABSTRACT: Yielding elements as a part of the shotcrete lining represent state-of-the-art tunnelling in overstressed weak ground conditions. These elements avoid overstressing of the shotcrete lining during the early curing process, where the displacement rates are highest and the shotcrete...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-290
... ABSTRACT: The umbrella arch support is frequently used as the tunnel face support system in difficult ground conditions. The Dong’ao Tunnel of Taiwan, which traverses through two thrust faults and a series of well-developed fractured zones, provides an important database for developing...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-301
... ABSTRACT: Tunnelling in argillaceous rock is very common because of the widespread occurrence of those materials in the earth crust. Research on argillaceous rocks have been further stimulated in recent times because of their suitability as host rocks in deep geological repositories...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-273
... ABSTRACT: This paper presents the findings of numerical analysis and monitoring of blast-induced ground vibration of a rock tunnel for the Kebasen railway tunnel in Indonesia. The numerical analysis uses the blast load approach that calculates the magnitude of the equivalent blast load...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-325
... ABSTRACT: There are several precedents of unintended surface settlements resulting in enormous loss of costs and time, even if for the rock medium. The expansion of shield tunneling requires controlling the shield tunneling parameters precisely to reduce the surface settlements. In this study...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-247
... ABSTRACT: Most existing models about penetration rate (PR) prediction have been developed and validated against data from one single project. This poses the question whether these models can perform well when faced with new data. We use two datasets of two tunnels built with the same...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-279
... ABSTRACT: Simplified 2D analysis of ground support interaction using the convergence-confinement method, although useful in preliminary stages of tunnel design, may be inadequate for complex situations which necessitate 3D numerical simulations with high computational efforts and costs...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-302
... ABSTRACT: The stability of tunnels through relatively hard rock and low stress environments are typically governed by loosening loads. These are typically caused by unstable blocks bound by discontinuities in the rock mass. There are numerous methods to determine the support pressure required...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-284
... sharing has been recently proposed. In this paper, this new Hoek-Brown with Softening model is adopted to predict the progressive brittle failure of the Lac du Bonnet granite at the Underground Research Laboratory Mine-by test tunnel. The results confirm the capability of the constitutive approach...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-304
... ABSTRACT: Groundwater is one major reason for tunnel collapses throughout history. Tectonic fault zones, characterized by heterogeneous rock mass composition and low strength, are particularly prone to such events. The article describes the groundwater conditions in heterogeneous ground...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-274
... ABSTRACT: This article deals with the numerical analysis of long-term behaviour of deep underground tunnel structures in claystone with "ductile lining" using PLAXIS 2D. The constructed gallery is a 2.6 m radius circular made of yielding sprayed concrete lining and is constructed at a depth...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-246
... can be advantageous for in-situ tunnel monitoring since the distributed strain and temperature sensing feature delivers a complete picture of the linings’ structural deformation behavior without blind spots. This paper discusses numerous DFOS tunnel monitoring designs and realizations at different...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-299
... ABSTRACT: The pile-beam-arch construction method is widely used in subway station engineering. However, the mechanical response of underground is not clear during the construction of using this method, particularly in subway station with asymmetric pilot tunnels layout. Taking one...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-348
... geology geologist hydraulic fracturing europe government fluid dynamics fracture upstream oil & gas flow in porous media reservoir geomechanics fracture propagation interface fallah soltanabad tunnel propagation loading fracture mechanic fluid injection influence reservoir...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-347
... ABSTRACT: This paper presents a comparison between the response of an isotropic continuum and a jointed discontinuum when subject to a moving point load source. A numerical model was setup in the Universal Discrete Element Code (UDEC) and a tunnel was modelled longitudinally as nodes within...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-311
... of the existing LHC ring at an average distance of approximately 50 m from the LHC axis and located 7 m above the existing LHC tunnel crown. This paper describes the design challenges and construction issues developed at Point 5 where the new underground structures mainly consist of: i) a new shaft PM57 (ϕ=12m...

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