Journal
COMPUTERS AND GEOTECHNICS
Volume 37, Issue 7-8, Pages 977-990Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compgeo.2010.08.006
Keywords
Cavity expansion; Coefficient of earth pressure; Completely decomposed granite; Numerical simulation; Laboratory tests
Categories
Funding
- Government of Hong Kong [9040593, CityU 1178/03E]
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Compaction grouting is the injection of a viscous grout into a soil under high pressure, which then densifies the surrounding soil by reducing void space. Laboratory and field tests of compaction grouting have been carried out. In this paper, a numerical model is used to simulate the compaction grouting process with the primary purpose of investigating relationships among various control parameters, such as injection pressure, void ratio and excess pore water pressure at various radial distances from the injection point. The compaction process is treated as a cavity expansion process in the numerical simulation. The soil is modelled with an elasto-plastic Mohr-Coulomb model using the commercial finite element program ABAQUS. In addition to numerical simulations, pressure-controlled cavity expansion laboratory tests were carried out on completely decomposed granite (CDG) soil specimens. Data collected from laboratory tests are compared with the finite element simulation to validate the finite element analyses. Factors that control the compaction process, such as the coefficient of earth pressure (K), initial void ratio, number of loading cycles and effective confining pressure, are explored in the numerical simulations. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.
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