| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a low-strength cavity filler that can be efficiently filled into a cavity part of low-strength ground within a short time at a low facility cost, and a cavity filling method for the low-strength ground. <P>SOLUTION: The low-strength cavity filler is obtained by kneading cement, sirasu and an admixture in water to form sirasu mortar and mixing a dispersion liquid of a foaming reaction agent into the sirasu mortar. The cavity filling method is the method for filling the cavity in the low-strength ground having rock mass strength of around 0.5-3 N/mm<SP>2</SP>, wherein the dispersion liquid of the foaming reaction agent is mixed into the sirasu mortar to form the low-strength cavity filler immediately before or a few hours before pressure-feeding of the filler to the low-strength ground by a pump and the cavity is densely filled through a foaming reaction that takes place after the low-strength cavity filler is filled into the cavity. <P>COPYRIGHT: (C)2007,JPO&INPIT |
