A construction method of composite structure platform for bridge Y-shaped pier construction

Abstract

The invention discloses a mounting method of a composite structure platform for construction of a Y-shaped pier of a bridge. The method comprises the following steps that (1) a plurality of vertical pre-embedded steel plates are arranged on the left side and the right side of a bearing platform formwork at intervals respectively, and a plurality of horizontal pre-embedded steel plates are arranged on the top faces of the positions, on the left side and the right side of a stand column of the Y-shaped pier to be poured, of the bearing platform formwork at intervals respectively; (2) a bearing platform is poured; (3) a plurality of section steel beams are erected on the two sides of the stand column of the Y-shaped pier to be poured respectively; (4) the stand column of the Y-shaped pier is poured; (5) the bottom ends of a plurality of concrete-filled steel tube inclined struts are welded and connected to the vertical pre-embedded steel plates and the horizontal pre-embedded steel plates respectively, and the other ends of the concrete-filled steel tube inclined struts are welded to the correspondingly-arranged section steel beams respectively; (6) bailey beams and distribution beams are sequentially laid on the section steel beams on the same side; and (7) Y-shaped pier formwork supporting frames are distributed on the distribution beams on the left side and the right side respectively. According to the method, the shear strength of concrete is greatly improved.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a combined structure platform for construction of a bridge Y-shaped pier and an installation method thereof. Background technique [0002] At present, the known Y-shaped bridge construction platforms have multiple methods, but certain problems still exist. Generally speaking, it is not suitable for geological conditions where the muddy overburden is too thick and relatively hard rock formations, and the strength of the pier body cannot be effectively used to transmit vertical loads. It is a big waste, and it cannot be cut off underwater under the condition of high navigation requirements. The universality is poor, and the load-bearing performance of the steel platform cannot be maximized. [0003] The construction method of the large-angle Y-shaped pier column announced by publication number CN104746435A adopts a large number of steel pipe pile structures and cable-stayed stru...

AI Technical Summary

Problems solved by technology

After the construction of the Y-shaped pier is completed, the steel pipe piles are not easy to pull out, and only the method of cutting can be used, resulting in waste of materials

[0004] Publication number CN202390763U announces the bridge V-type bridge pier concrete structure formwork supporting frame, and the V-shaped supporting frame that it adopts is the method for carrying out cap beam concrete structure construction after V-limb construction, can not effectively apply and V-limb construction

[0005] Publication Nos. C102888815A and CN202954299U disclose a large-angle V-shaped pier and a pouring construction method for 0# block box girders, which require a large number of supports to be laid out, and the material consumption is large, and the foundation also needs to be treated

[0006] A kind of Y-shaped pier formwork and support system announced by publication number CN203007846U and the V-shaped pier inclined leg combined support and layered cast-in-place construction method of continuous rigid frame bridge announced by publication number CN101481902A, its erection depends on the bridge body Surrounding piles and additionally drilled bored piles, and the layout of multiple pairs of tie bars, the support connection is complicated, which makes the program poor adaptability and difficult to implement during the implementation process. Pile cap structure

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