Estimation of compaction grouting pressure in strain softening soils |
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Authors: | Xiao-li Yang and Jin-feng Zou |
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Affiliation: | (1) School of Civil and Architectural Engineering, Central South University, Changsha, 410075, China |
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Abstract: | A new method was proposed to predict the limited compaction grouting pressure for the soft soils. Theoretical basis of the
method considered the conical shear failure above the grout bulb. Using the Mohr-Coulomb yield criterion as the initial yield
function, the limited compaction grouting pressure was determined, according to the softening elastic-plastic model based
on the conventional triaxial compression tests to simulate the strain softening soils. The small strain in the elastic zone
and large stain in the plastic zone and the rational yield function for the strain softening phase stage, the analytical solutions
to the compaction grouting pressure were presented. The results indicate reasonable agreement and show a good potential of
the proposed method for rationally optimizing the design of compaction grouting operations.
Foundation item: Project (200550) supported by the Foundation for the Author of National Excellent Doctoral Dissertation of China; Project
(09JJ1008) supported by Hunan Provincial Natural Science Foundation of China |
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Keywords: | compaction grouting strain softening spherical cavity expansion ultimate pressure |
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