Simulation of the mechanical behavior of inclined jointed rock masses during tunnel construction using Discontinuous Deformation Analysis (DDA)

Jian Hong Wu, Y. Ohnishi, S. Nishiyama

Research output: Contribution to journalArticlepeer-review

111 Citations (Scopus)

Abstract

In this paper, the mechanical behavior of inclined jointed rock masses during tunneling is considered. Such rock masses can be considered as an assembly of discrete blocks with the discontinuities having a significant influence on the mechanical behavior. To simulate this situation, a discrete numerical analysis method, Discontinuous Deformation Analysis (DDA), is applied. The DDA results show the existence of stress arching in the rock masses during tunneling. This stress arching is the primary influence on the stress distribution and surface subsidence. In addition, the stress arching is affected by the dip angle of the jointed rock masses. Moreover, the DDA results are in good agreement with experiments, explaining the reason for the asymmetrical vertical stress and surface subsidence obtained in laboratory tests. These results suggest that DDA can be applied to model the tunneling behavior of complicated discontinuous rock masses.

Original languageEnglish
Pages (from-to)731-743
Number of pages13
JournalInternational Journal of Rock Mechanics and Mining Sciences
Volume41
Issue number5
DOIs
Publication statusPublished - Jul 2004
Externally publishedYes

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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