Abstract
Recently, the solution type permanent grout for the countermeasure against liquefaction beneath the existing structures was developed and was adopted in several sites. In this paper, permeability of chemical grout material and strength property of improved soil by injecting the new chemical grout are studied. These tests show this new chemical grout material has high permeability and ability to increase strength against liquefaction. Because this chemical grout material is diluted by pore water during injection, expected strength is decreased by this dilution. In order to improve the strength of soil using this solution type chemical grout, consideration of dilution rate by pore water is appeared to be very important.
