Pier top block of precast beam constructed by stub matching method

Abstract

The invention discloses a pier top block of a precast beam constructed by a stub matching method. The pier top block comprises a top plate, two base beams and three web plates, wherein preformed holes for secondary casting are formed in the top plate; the bottom beams are symmetrically arranged on two sides of an axle wire of the pier top block in the direction of a horizontal bridge; the three web plates are used for connecting the top plate and the two bottom beams; the outer side boundaries, in the direction of the horizontal bridge, of the bottom beams, and the outer side boundaries, in the direction of a vertical bridge, of the web plates, are in the same plane; separation plates are arranged among the bottom beams, the web plates and the top plate in the direction of the horizontal bridge; the side boundaries of the preformed holes in the direction of the horizontal bridge are aligned with the inner side boundaries of the separation plates in the direction of the vertical bridge, and the side boundaries of the preformed holes in the direction of the vertical bridge are aligned with the inner side boundaries of the web plates in the direction of the vertical bridge. The pier top block disclosed by the invention has the characteristics of being convenient to precast, good in construction operability, safe, reliable and good in application prospect.

Description

technical field [0001] The invention relates to the field of bridge engineering short-line matching method construction method design. More specifically, the present invention relates to a pier top block of a prefabricated beam by short line matching method. Background technique [0002] At present, domestic continuous girder bridges and continuous rigid frame bridge superstructure box girder construction methods mainly include support method, cantilever cast-in-place and short-line matching prefabricated cantilever method. The construction of the short-line matching method is suitable for bridge structures with a large number of prefabricated segmental girders, short construction period requirements, and high environmental protection requirements of the bridge site. [0003] The main technology of the short-line matching method can be decomposed into short-line matching prefabrication of beam sections and T-frame erection of beam sections. In the construction of continuou...

AI Technical Summary

Problems solved by technology

[0011] 3. Because the top block of the pier is a structure without a bottom plate, when prefabricating the 1# block, it cannot be matched with the top block of the pier, and a wet joint needs to be set between the block and the No. 1 block;

[0012] 4. The second pouring of the pier top block and pier column 0 consolidation also needs to install and dismantle the partition wall end formwork, which is low in work efficiency;

[0013] 5. According to the calculation and on-site measurement results, the small rigidity of the top block of the pier leads to large lateral deformation, which brings difficulties to the matching erection of the 1# block

[0014] 6. The above problems lead to a lot of high-altitude operations in the future. Not only is the construction difficult and the work efficiency is low, but the quality is also difficult to guarantee

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