| 摘要 |
<p>MULTIPLE GROUTING PROCESS A multiple grouting process for solidifying poor ground by injecting a plurality of grouts of different penetrability through a grouting pipe inserted into the ground which comprises injecting said grouting agents into the ground through pipe lines in a multiple pipe employed as said grouting pipe while transferring said multiple pipe vertically to change an operating stage thereof, a grout of lower penetrability being injected to form a solidified seal as a packer in a gap between said multiple pipe and the ground so as to prevent a grout of higher penetrability to be injected subsequently from leaking out through the gap, and to fill up coarse-grain layers around the operating stage so as to leave said grout of higher penetrability within a predetermined region of the ground, then said grout of higher penetrability being introduced into the ground breaking through said seal. The ground is solidified in a single step and in a short period economically.</p> |
