PURPOSE: To prevent the deformation of a reinforcement and the inclination of an end mould by providing plural pressure jacks to operate separately from the end mould and to apply a pressure to the concrete placed between the end mould and an inside mould, to the end mould.
CONSTITUTION: After an excavation is finished, a propelling jack 5 is contracted to withdraw one end-mould 3a to the position a reinforcement 6 is assembled, to a facing side. Then a joint reinforcement 10 is inserted to a joint reinforcement insertion port 11 provided at the end mould 3a, and the reinforcement 6 is assembled. And after an inside mould 8 is assembled by using an erecter 7, the jack 5 is extended to fix the end mould 3a to the inside mould 8. The same works are repeated to other end-moulds, and the inside mould 8 and the jack 5 are expanded every time. Furthermore, after a concrete 13 is placed inside the mould, the pressure of the concrete 13 is detected by a pressure gauge, and a desired concrete pressure jack 4 is extended or constracted to apply or reduce the pressure until the concrete 13 gets a specific pressure.
| JP6307136 | Open shield method |
| JP6674859 | Disc cutter and excavator |
| JP2001141151 | JACKING PIPE WITH EARTHQUAKE-RESISTANT FUNCTION |
SASAKI YUKINOBU
NAKAO TSUTOMU
| JPS63171492U | 1988-11-08 | |||
| JPS6471998A | 1989-03-16 |