PURPOSE: To make unnecessary a form required for placing concrete, to omit various works pertaining thereto, to make unnecessary built-up and installation of reinforcing bars, to reduce competitive work at a facing to make it possible to improve greatly execution work efficiency, to have good cut-off efficiency in addition thereto, to make it possible to thin the thickness of a lining and to make it possible to freely choose concrete to be used.
CONSTITUTION: Both internal and external frame surfaces of metal frames 2 of steel materials, etc., are closed with metal plates 3a and 3b such as steel plates, etc., to use box-shaped metal lining bodies 1 forming concrete filling spaces 4. After the box-shaped metal lining bodies are connected to each other at a tail section of a shield excavator 20, the concrete filling spaces 4 are filled with concrete 24, and the shield excavator is driven to repeat the same work. If necessary, force-fit of concrete 25 to a bed-rock from backfilling injections 8 provided to the metal lining bodies is made for back-fill.
NAKAMURA MINORU
SONODA TETSUJI
NAGURA HIROSHI
YAMAGAMI KIYOSHI
NIPPON STEEL CORP
HAZAMA GUMI
SEIBU KENSETSU KK
| JPH01125500A | 1989-05-17 | |||
| JPH0411199A | 1992-01-16 | |||
| JPS6176897U | 1986-05-23 | |||
| JPS60246999A | 1985-12-06 | |||
| JPS61173599U | 1986-10-28 | |||
| JPS4944314A | 1974-04-26 |