Backfill method of filling method and existing constructs of existing buried cavity tube

摘要

PPROBLEM TO BE SOLVED: To provide filler for an existing buried hollow pipe or filler for a cavity between a structure and the ground or a treatment method for an existing buried irrigation channel pipe. PSOLUTION: Filler for the existing buried hollow pipe is produced by recovering and storing minute powder soil 3 caused when washing gravel 2 sampled from a gravel pit and adhered to gravel, adding water 4 to it, and dissolving it to produce grout 1. Minute powder soil 3 adhered to gravel by washing gravel 2 sampled from the gravel pit is recovered and stored, cement or cement solidifying agent and other coagulant 5 are mixed with it, water 4 is added to it, and it is dissolved to produce grout 1. PCOPYRIGHT: (C)2006,JPO&NCIPI