Original paper(Vol.47 No.2 pp.148)

Evaluation of the cohesion of chemically grouted sands

Morikawa Yoshito; Tokoro Takehiko; Takahashi Norio

Abstract:To evaluate the effect of soil improvement by grouting, the test results using a specified type of soil such as standard sand or silica sand and specified chemicals have been conventionally used. However, it is uncertain whether or not the results of such evaluations can be applied to the actual sites. Moreover, the strength of the sand solidified by chemical grouting has only been qualitatively evaluated by its relative density and/or grain size.
In this study, the cohesion of sand solidified by chemical grouting was precisely evaluated by a simple method using the hydraulic radius of sand and the tensile strength of pure grout. From the result, a quantitative method was proposed for predicting the cohesion of sand solidified by chemical grouting at the actual sites.

Key Words:chemical grounding, grouted sand, hydraulic radius, cohesion, tensile strength