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(사)한국터널지하공간학회

ISSN : 2233-8292

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Vol.20 No.6

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Numerical analyses using CFD on the pressure losses of the grout flow with variation of joint roughness and grout features

(사)한국터널지하공간학회 / (사)한국터널지하공간학회, (P)2233-8292; (E)2287-4747
2018, v.20 no.6, pp.989-1002
https://doi.org/10.9711/KTAJ.2018.20.6.989


& (2018). Numerical analyses using CFD on the pressure losses of the grout flow with variation of joint roughness and grout features. (사)한국터널지하공간학회, 20(6), 989-1002, https://doi.org/10.9711/KTAJ.2018.20.6.989

Abstract

Grouting for the rock joint is to strengthen the rock strata by infiltrating cement grout materials into the rock joints. Grouting is one of a field of study which is difficult to develop deterministic and quantitative design approach because of multiphase behaviors of grout materials and 3 dimensional features of rock joints. Therefore, GIN (Grouting Intensity Number) can be a good index with appropriate monitoring of pressure and volume of grout. In this paper, we investigate the effects of joint roughness (JRC) and rheology of cement material during the infiltration of cement grout material into rock joint through CFD (computational fluid dynamics) analyses. With rough joint surface and increase of WC ratio, the frictional resistance during the grouting increases. The results have been summarized with polynomial correlations.

keywords
그라우팅, GIN, 암반절리, 전산유동해석, Grouting, GIN, Rock joint, CFD analyses

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