Patent ID: 11898447
Assignee: CCTEB INFRASTRUCTURE CONSTRUCTION INVESTMENT CO., LTD.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 1:
2. A formwork transporting method for full-circle secondary lining inverted arch construction of a long-distance tunnel, comprising adopting a cantilever gantry crane (2) and a transportation flat car (3) for formwork transporting, wherein travel rails of the cantilever gantry crane (2) and the transportation flat car (3) are integrated on a customized steel formwork (1), and there is no other rail; the formwork transporting method comprises specific steps of:
S1: installing the cantilever gantry crane (2) at a hole entrance; hoisting the customized steel formwork (1) by a cantilever part outside the hole, and rotating for 90 degrees;
S2: starting a longitudinally-moving hoist; moving a first formwork to pass through columns of the cantilever gantry crane (2), and transporting to a cantilever part in the hole; then rotating the first formwork by 90 degrees;
S3: lowering the first formwork by the cantilever part in the hole; meanwhile, extending an oblique supporting rod out of the first formwork for supporting, in such a manner that longitudinal rails (103) integrated on the first formwork are aligned with the rails of the cantilever gantry crane (2);
S4: repeating the steps S1-S3, thereby installing a second formwork, and connecting flanges (105) of the first formwork and the second formwork;
S5: repeating the steps S1-S4, thereby installing residual formworks; using the transportation flat car (3) when the formworks are more than a certain amount, so as to improve efficiency;
S6: reinforcing the formworks with steel pipe supports (7) and turn buckles (8), and pouring concrete; withdrawing the oblique supporting rod to a formwork surface as soon as concrete pouring is finished, and then curing;
S7: removing the steel pipe supports (7) and the turn buckles (8), and installing a secondary cantilever gantry crane (2) at the hole entrance;
S8: hoisting the first installed formwork by a cantilever part at the hole entrance, and rotating by 90 degrees; starting the longitudinally-moving hoist, moving the first installed formwork to pass through the columns of the cantilever gantry crane (2), and transporting to a cantilever part at the other end; then rotating the first installed formwork by 90 degrees and placing on the transporting flat car (3);
S9: moving the transportation flat car (3) to the secondary cantilever gantry crane (2), hoisting the first installed formwork by a cantilever part at one end, and rotating by 90 degrees; starting the longitudinally-moving hoist; moving the first installed formwork to pass through the columns of the cantilever gantry crane (2), and transporting to a cantilever part at the other end; lowering the first installed formwork to finish transportation and installation; and
S10: repeating the steps S8 and S9; transporting, installing, supporting and reinforcing the residual formworks, and pouring concrete.