| 摘要 |
FIELD: construction.SUBSTANCE: method for erection of a bridge on a water area includes submersion of permanent support piles (PSP) of the bridge into the water area bottom with pile driving equipment using temporary supports (TS), installation of spans and erection of a traffic way bed. At the initial stage of works from the bridge abutment the TSs are submerged with arrangement of temporary support beams on them, onto which a process complex (PC) is installed with the possibility of its displacement along these support beams to leader TSs, by means of which, in process of movement in design direction of works, next TSs and PSPs of the next intermediate bridge support are mounted in series. The mobile PC is equipped with equipment and assembly elements for installation of metal TSs and PSPs, a heavy-load lifting crane and a pile dipper, equipped with conductors placed on the TC for arrangement of TS and PSP piles at design position by means of a lifting crane with their further submersion in bottom soil with the pile dipper at the required depth. At the following stages of works the PC is moved along newly laid temporary support beams, serially another leader TSs are arranged to the design section of PSP installation, and intermediate bridge supports are installed. In the design area of intermediate bridge support installation with PSPs submerged into soil between two adjacent rows of TSs a box is mounted of interlocking panels, by means of a welded joint grown to the design elevation of the bridge TSs, a temporary transverse crossbar is fixed on them, and by the method of longitudinal launching a section of the bridge metal section is installed on it. From the box formed by interlocking panels water is pumped, and soil is withdrawn, and in the box the foundation and the stepped body of bridge support are erected in series by means of reinforcement and concreting to the specified height above the bridge span. Construction materials for erection of the foundation and bridge support body are delivered to the section of reinforcement and concreting along the upper span by means of motor transport, a concrete truck and autoconcrete pumps, and at the final stage of works the upper span is finally installed into the design position, lowering by means of hydraulic jacks onto the support parts of the erected body of the support, the TSs are dismantled, and the traffic way bed is arranged on the span.EFFECT: improved manufacturability and operational reliability of construction, reduction of its duration and reduced labour intensiveness.7 cl, 3 dwg |
