補強土 (1)

[III-165] Study of suitable grout compounding to expand grout body by pressure injection

*石垣 幸整¹、窪塚 大輔¹、横山 一輝¹、三上 登¹、杉山 友康²、阪東 聖人² (1. 日特建設、2. 京都大学大学院)

Keywords:natural ground reinforcement method, embankment slope, pressure injection, rock bolt, soil nailing, high performance AE water reducing agent

In recent years, the case of embankment slope reinforcement by natural ground reinforcement method is increasing.The authors think that it is effective to increase pull-out resistance per one with expand grout body which is pressurized and injected grout having pressure dehydrator high-resistance.This study evaluate some grout compounding to find out it having pressure dehydrator high-resistance on pressure bleeding test and simulation soil layer test.As the result of these test, it became clear that it is possible to construct easily expandable grout body which reduced W/C more than natural normal by using high-performance AE water reducing agent.