The effect of fracture outcrops around tunnel on seepage

Hung I. Lin, Shu Han Wong, Cheng Haw Lee

Research output: Contribution to journalArticlepeer-review

Abstract

Parameters of fractures are the basic components of hydraulic models in fractured rocks. However, the outcrops of fractures on the hydraulic boundary are the actual passages of inflow and outflow in fractured rocks and tunnel wall. The computer code, TUNFLOW, which base on the discrete fracture model is applied to estimate the hydraulic conductivity and outcrops of simulated cases in this research. The results show that the preferential path exists in partial fracture net. Density and trace length of fractures are the major factors to amount of the effective outcrops, which are the outcrops that groundwater passed. There is a fairly relation between seepage and outcrops on the tunnel wall. This result could be used in estimating the groundwater surge with number of outcrops, and result in the case of Syueshan tunnel is very close to the record in-situ.

Original languageEnglish
Pages (from-to)287-295
Number of pages9
JournalJournal of the Chinese Institute of Civil and Hydraulic Engineering
Volume23
Issue number3
Publication statusPublished - 2011 Sep 1

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering

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