Numerical simulation on rock cutter performance in mixed ground

Aiai Dong, Guowei Ma, Qiuming Gong, Jian Zhao

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

8 Citations (Scopus)

Abstract

Tunnel boring machines (TBM) has been popularly used for rock tunnel constructions. It is of great importance to establish an accurate and reliable performance index of the disc cutters for the TBM, especially in complex ground conditions. The present study adopts smooth particle hydrodynamics (SPH) which is a virtual particle based meshfree method to evaluate the rock cutter performance in jointed and mixed media. The SPH method is capable of simulating rock crushing, rock fragmentation and chipping, etc., free of the mesh constraint of the traditional FEM and FDM models. A modified Drucker-Prager strength model for rock is developed. The nonlinear strength envelope of the developed model is generalized based on the widely accepted Hoek-Brown rock failure criterion. The performance of the rock cutters is evaluated in terms of rock strength index. The result will be useful for estimation of the attainable penetration rates and optimization of the cutters and overall TBM design.

Original languageEnglish
Title of host publicationSoil and Rock Behavior and Modeling - Proceedings of the GeoShanghai Conference
PublisherAmerican Society of Civil Engineers
Pages199-204
Number of pages6
Edition150
ISBN (Print)0784408629, 9780784408629
DOIs
Publication statusPublished - 18 Dec 2006
Externally publishedYes
EventSoil and Rock Behavior and Modeling - Shanghai, China
Duration: 6 Jun 20068 Jun 2006

Publication series

NameGeotechnical Special Publication
Number150
ISSN (Print)0895-0563

Conference

ConferenceSoil and Rock Behavior and Modeling
CountryChina
CityShanghai
Period6/06/068/06/06

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