Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering)
Online ISSN : 2185-6516
ISSN-L : 2185-6516
Paper (In Japanese)
EXAMINATION OF THE STRENGTH DEVELOPMENT OF CHEMICALLY GROUTED SAND USING ELASTIC WAVE TEST
Takamitsu SASAKINaoaki SUEMASAShunsuke SHIMADA
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2020 Volume 76 Issue 4 Pages 374-393

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Abstract

 It is well known that the strength of sand improved by chemical grouting is influenced by many factors including the type of base resin, silica concentration, soil grain and density. Although the strength is several to several tens of times larger than that of the silica hydrogel, the mechanism for increasing the strength has not been clarified. In this paper, a new proposal was made on the strength mechanism in which the volumetric shrinkage of silica hydrogel in sand offers confining pressure to the sand skeletons. In order to prove the validity of the mechanism, a series of unconfined compression strength tests, splitting tensile strength tests and elastic wave tests were carried out. Furthermore, the strength development of the improved soil was estimated by equations proposed on the basis of the mechanism.

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© 2020 by Japan Society of Civil Engineers
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