| 摘要 |
<P>PROBLEM TO BE SOLVED: To surely pressurize and inject grout materials into all bags and to sufficiently expand the grout materials when serially arranging a plurality of bags in a pipe axis direction of a grout injection pipe. <P>SOLUTION: A rock mass reinforcement 1 comprises bags 2a, 2b and 2c arranged in series in a pipe axis direction of a grout injection pipe 3 and the grout injection pipe 3 includes discharge ports 12a, 12b and 12c formed in the pipe axis direction, thereby pressurizing and injecting grout materials through the discharge ports into the bags 2a, 2b and 2c. The discharge ports 12b and 12c are provided with discharge control mechanisms 11b and 11c, respectively, and when a discharge pressure of the grout materials from the discharge ports 12b and 12c exceeds a predetermined threshold value, an opened/closed state of the discharge ports 12b and 12c can be shifted from the closed state to the opened state. <P>COPYRIGHT: (C)2013,JPO&INPIT |
