Connection structure of prefabricated bridge pier and bearing platform and construction method thereof

Abstract

The invention discloses a connection structure of a prefabricated bridge pier and a bearing platform, which is characterized in that the bridge pier is positioned by a positioning pier and is connected together with the bearing platform through a mounting island, and interactive shear keys are arranged between the bottom connection section of a pier body and the mounting island. The connection structure disclosed by the invention has the technical characteristics and effects that the lower part of the prefabricated bridge pier with an annular section is sleeved on the positioning pier so as to be convenient for positioning the pier body; the prefabricated bridge pier in the range of the cup-mouth mounting island is subjected to rough chiseling except the range of an externally-wrapped steel plate at a pier bottom, thereby ensuring the connection quality and effectively improving the stress performance of a bridge pier column; and the bearing platform is connected with the bridge pier through the annular mounting island, and the shear keys are arranged at the joint, thereby enhancing the shear resistance of the joint and facilitating construction. By adopting the connection structure disclosed by the invention, the bridge pier and the bearing platform are reliable in connection and stress, convenient in construction, simple in operation and easy to control, the workload of field welding and concrete pouring can be effectively reduced, and the construction progress can be accelerated.

Description

Technical field [0001] The invention relates to the technical field of road bridge construction, in particular to a connection structure of a prefabricated bridge pier and a bearing platform. It also relates to the installation and positioning technology of ring-shaped prefabricated bridge piers and caps. Background technique [0002] At present, most of the pier construction of bridge substructures in our country adopts the cast-in-place construction method. This construction method requires the pavement to be sealed during construction. In addition, the cast-in-place construction period is long, the construction quality is not easy to control, and the support and formwork in the construction are consumed. The amount is large, the construction cost is high, and it directly affects the road capacity of the construction site, which is incompatible with the requirements of urban construction and development. [0003] The length of the bridge is generally more than a few kilometers, ...

AI Technical Summary

Problems solved by technology

In addition, the prestressed line needs to be stretched and grouted during on-site construction, the construction process is complicated and the construction time is long

[0008] For example, the Chinese patent CN202543789U discloses a "connection structure between prefabricated bridge piers and caps". , reducing the workload of on-site welding and on-site concrete pouring to the greatest extent, which is beneficial to quality control and speeds up the construction progress, but it has high requirements for the joints between segments, and prestressed steel bars or ordinary steel bars are used to connect the segments Larger construction space is required, and the construction process is complex

In addition, if ordinary concrete is used to assemble bridge piers with dry joint segments, if the joints only use concave-convex shear keys, under the action of earthquake force, the joints of bridge pier segments are prone to impact damage, and the concrete at the joints is severely peeled off, and the durability remains to be seen. improve

[0009] Traditional bridge piers generally adopt solid cross-sections, the amount of concrete materials is relatively large, and the construction period of on-site cast-in-place is relatively long. During the construction process, the overall deviation of the steel skeleton is prone to occur, resulting in too thin concrete protection layer, exposed steel bars, and corrosion of pier columns.

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