Abstract
It has already been proved from in-situ tests that the “Repeated grouting type ground anchor” using special grouting method is an anchoring method available to loose soil. In this study, a series of laboratory triaxial grouting tests with several types of ground, which were different coefficient of permeability, and laboratory model tests for sandy ground with loose density were performed in order to investigate the pull-out and grouting properties. The main conclusions maybe summarized as follows: 1) Anchor pressure bulb mode by this method was classified compaction grouting, fracturing grouting and their combined grouting; 2) Pull-out capacity due to “Repeated grouting anchor” increased several times as much as that of normal type anchor; 3) The mobilized mechanism of pull-out capacity and grouting characteristics were clarified based on the test results. In addition, a new construction management method was proposed for “Repeated grouting type ground anchor”.
