Continuous beam bridge pier temporary consolidation structure and construction method

Abstract

The invention discloses a continuous beam bridge pier temporary consolidation structure and a construction method, The structure belongs to the field of bridge construction, and comprises a pier, a No. 0 block and a spherical bearing, and also adopts a temporary bearing composed of a cushion block and a tetrafluoro plate. The advantages of the utility model are as follows: 1, the tetrafluoro plateand the concrete cushion block are rigidly and flexibly combined, the settlement is moderate, the alignment of the continuous beam is favorable for controlling the cantilever construction, and the elevation error precision is controllable; 2, that temporary support is simple in structure and low in cost, and the concrete cushion block is convenient and fast to be cut by a mechanical rope, therebysave manpower and material resources; 3, quantitative design, reasonable stress, the secondary internal force greatly reduced, enhance the durability of the bridge. Therefore, by designing the temporary consolidation structure of the continuous beam bridge pier and combining with the corresponding construction method, the structure has the advantages of simple structure, rigid-flexible combination, moderate settlement, convenient use, reasonable stress, enhanced durability of the engineering structure, energy saving and emission reduction, and can ensure the quality and safety of the project,and the economic and social benefits are significant.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a temporary consolidation structure of a continuous beam bridge pier and a construction method. Background technique [0002] Continuous girder hanging basket cantilever cast-in-place concrete construction is a conventional method. Whether the temporary support used for the temporary consolidation of the top of the middle pier and the bottom of No. 0 block of the continuous girder is reasonable and scientific has a great influence on the force of the continuous girder after the bridge is completed. Due to the narrow space between the bottom of the continuous beam and the top of the bridge, and the limited mechanical cutting technology, it is difficult to rely on manual removal of temporary consolidation. Therefore, early temporary supports generally use methods such as sand cylinders and sulfur mortar. However, when the temporary consolidation is removed, Due to the existence o...

AI Technical Summary

Problems solved by technology

Due to the narrow space between the bottom of the continuous beam and the top of the bridge, and the limited mechanical cutting technology, it is difficult to rely on manual removal of temporary consolidation. Therefore, early temporary supports generally use methods such as sand cylinders and sulfur mortar. However, when the temporary consolidation is removed, Due to the existence of frictional resistance of sand and gravel, it is difficult to ensure the stability of sand discharge from the sand barrel and the synchronous release of multiple temporary consolidations of the whole bridge. The formula of sulfur mortar, the effect of electrification and melting, and the aging of temporary supports exposed to the natural environment for a long time, etc. The reason is that the reliability of electrification melting is not high, so there are examples of temporary consolidation failure of sand cylinder and sulfur mortar

At present, due to the development of rope cutting technology that is not limited by space, rigid temporary supports such as concrete and steel plates are often used for temporary consolidation. The continuous beam behind the bridge produces secondary internal force, which affects the force and durability of the bridge

[0003] The disclosed inventions CN201110450632.4 "A Method for Eliminating Subsidence Subsidence Force of Supports of Continuous Beams in Cantilever Construction" and CN201110450635.8 "A New Type of Temporary Consolidation System for Cantilever Construction of Continuous Beams" use flexible temporary supports, The unloading layer is similar in principle to the sand cylinder and sulfur mortar. Although the settlement difference is reduced to a certain extent, due to the large settlement of the flexible temporary support, the deflection of the cantilever end is increased. The continuous beam of the cantilever hanging basket construction Linear control is more difficult, and there are also unloading reliability problems, and the structure is more complicated and the cost is higher

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