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Cement-based fracture grouting phenomenon of weathered granite soil

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Vydáno v:KSCE Journal of Civil Engineering vol. 21, no. 1 (Jan 2017), p. 232
Hlavní autor: Yun, Ju-Won
Další autoři: Park, Jeong-Jun, Kwon, Young-Sam, Kim, Byung-Kyu, Lee, In-Mo
Vydáno:
Springer Nature B.V.
Témata:
Filtration
Soils
Grouting
Water-cement ratio
Thickness
Unsaturated soils
Penetration
Permeation
Crack initiation
Granite
Soil types
Exact solutions
Cement
Concrete
Grout
Fracture mechanics
Soil
Pressure
Environmental
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Abstrakt:The injection process of fracture grouting and/or fracture-permeation grouting is studied in this paper and analytical solutions are proposed to determine the fracture initiation pressure, the fracture length and thickness, and the pressure-induced filtration phenomenon for weathered granite soil, which is the most abundant soil type on the Korean peninsula. A theory is proposed and then verified through laboratory chamber tests. Experimental results show that fracture grouting occurs in unsaturated weathered granite soil, while fracture-permeation grouting occurs in saturated weathered granite soil. Also, through the experimental results with unsaturated weathered granite soil, it was found that the filtration phenomenon occurs when the water-cement ratio of the grout is less than 1.25. We were also able to demonstrate that the fracture initiation pressure as well as the fracture length and thickness obtained from the experiments match reasonably well with the theoretical values obtained from the analytical solutions.
ISSN:1226-7988
1976-3808
DOI:10.1007/s12205-016-0862-1
Zdroj:Environmental Science Index