PURPOSE: To make it possible to protect concrete from flowing out during placement of concrete by laying out a sheet near a groove wall at a spot subject to collapse and installing a specified bag-shaped form to the rear side of the sheet and filling up a curing projection agent thereinto.
CONSTITUTION: A sheet 3 is laid out at a spot 2 subjected to collapse or slip down while a steel plate is laid out on the rear side of the sheet 3. A bag-shaped form 8 is installed to the rear side of the steel plate 4 located at a bordering position between a preceding element 6 and a succeeding element 7. The bag- shaped form 8 is removably mounted to a reinforcing bar bag 9 and laid out at a specified position inside an excavated groove. Then, a fast curing injection agent is implanted into there. After it is cured, the bag-shaped form 8 is held so as to keep a specified shape and backed-up. A cement group injection agent is filled up with an injection pipe 13 so as to protect the collapsed spot 2 after cured and prevent the concrete from flowing out. The concrete on the preceding element 6 is placed. This construction makes it possible to improve workability, reduce work period and cut down cost as well.
SUWA TETSUO
NAITO MASAFUMI
| JPS63312416A | 1988-12-20 |