Construction method for erecting and installing bridge pier top block by adopting floating crane

Abstract

The invention discloses a construction method for erecting and installing a bridge pier top block by adopting a floating crane. The method comprises the steps that a permanent support is installed on the top of a pier body, a temporary support is erected on the side of the pier body, and a three-direction adjusting jack is arranged on the top face of the temporary support; the floating crane is adopted for lifting the pier top block to the portion above the top of the pier body, and the three-direction adjusting jack is controlled to complete positioning of the pier top block; a screw-type jack is arranged on the temporary support, and the floating crane instrument is disassembled; finally, pouring and tamping are performed on a leveling layer between the bottom of the pier top block and the permanent support; after the requirement for strength is met, the three-direction adjusting jack and the screw-type jack are disassembled. The pier top block is erected in a floating-crane mode, a distribution beam is anchored on the pier top block after construction is completed, a bridge machine is erected, and a via hole is formed, so that the trouble caused by installing a bracket reserved branch trestle is omitted, the cost input is reduced, the erection safety of the pier top block is further ensured, and the erection speed of the bridge machine is increased so as to improve the erection safety and stability of the pier top block.

Description

technical field [0001] The invention relates to the technical field of bridge erection construction, in particular to a construction method in which bridge pier top blocks are erected and installed by floating cranes. Background technique [0002] At present, the beam erecting operation method of the segmental assembly walking bridge erecting machine is to prefabricate the box-shaped concrete beams to be erected in the beam yard in advance, and then use the beam truck to transport them to the position of the bridge hole. The erected bridge erecting machine feeds the beam at the rear end, and the crane girder crane on the bridge erecting machine hangs and arranges the prefabricated beam segments sequentially transported one by one under the main girder where the bridge erecting machine has been aligned with the bridge hole. Finally, each beam segment is assembled into a whole beam piece. [0003] The beam outriggers of the bridge erecting machine are usually supported by the...

AI Technical Summary

Problems solved by technology

The advantage of this erection method is: the pier top block is erected by the bridge erecting machine, which saves costs. The disadvantage is: it is necessary to reserve a trestle bridge to install the triangular truss, and the pier body will be repaired later. After the pier top block is erected and installed, the pier top The pouring of block concrete, the removal of formwork, the temporary prestressed construction of the pier top, etc., are time-consuming, and the strength cannot reach 100% because of the action of the front outrigger of the bridge erecting machine, the quality and speed cannot be guaranteed, and the bridge erection construction more risky

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