Coupled Computational Simulation of Excavation and Soil Transport in Earth-Pressure Balance Shield Tunneling Machines Using a Viscous Two-Phase Fluid Model for Soil-Foam Mixtures

The excavation process of earth-pressure balance (EPB) shield machines involves the cutting of the ground at the tunnel face and the transport of the soil paste in the excavation chamber. For the numerical simulation of these two processes, a computational strategy, characterized by the coupling of two partial models using the discrete element method (DEM) and the finite element method (FEM) has been developed (Wessels et al., 2013). Excavation is simulated using DEM, with the fracture process being represented by the release of interaction forces between the particles. The transport of the excavated soil mixed with the soil conditioning foam, yielding a pasty soil-foam mixture within the pressure chamber, is simulated by means of a two-phase fluid model in Eulerian description. The two momentum and mixture mass equations are discretized in time by the characteristic-based split method (CBS) (Zienkiewicz et al., 2005). The phase volume fraction equations are solved using upwind weighting functions according to the improved Mizukami-Hughes method (Knobloch, 2006). The proposed model is applied to a coupled analysis of the excavation and transport-mixing flow inside a simplified pressure chamber with foam injections. The mixing process, due to the rotation in the chamber, is preliminarily investigated by the mixing flow in a 2D cavity test case.

• Record URL:
  https://doi.org/10.1061/9780784413449.076
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784413449
• Supplemental Notes:
  • © 2014 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Dang, Thai Son
  • Meschke, Günther
  • Wessels, Nicola
  • Hackl, Klaus
• Conference:
  • Geo-Shanghai 2014
  • Location: Shanghai , China
  • Date: 2014-5-26 to 2014-5-28
• Publication Date: 2014-5

Language

• English

Media Info

• Media Type: Web
• Pagination: pp 780-789
• Monograph Title: Tunneling and Underground Construction

Subject/Index Terms

• TRT Terms: Earth pressure; Excavation; Foams; Shields (Tunnels); Simulation; Soils; Tunneling; Tunneling machines; Underground construction; Viscous fluids
• Subject Areas: Bridges and other structures; Construction; Geotechnology; Highways; I42: Soil Mechanics; I54: Construction of Tunnels;

Filing Info

• Accession Number: 01531666
• Record Type: Publication
• ISBN: 9780784413449
• Files: TRIS, ASCE
• Created Date: Jul 25 2014 4:17PM