Connection structure of precast pier with annular section and bearing platform and construction method of connection structure

Abstract

The invention discloses a connection structure of a precast pier with an annular section and a bearing platform. The connection structure is characterized in that the pier is positioned by a positioning pier, and is connected with the bearing platform through mounting islands, and the pier and the bearing platform are integrated; shearing rings in mutual effects are arranged between a connecting segment at the bottom of a pier body and the mounting islands. The connection structure disclosed by the invention has the technical characteristics and the effects that the bottom of the precast pier sleeves the positioning pier, so that the positioning of the pier body is facilitated; within the scope of the cup rim mounting islands, a trapezoidal concave-convex pattern structure is arranged on the connecting segment at the bottom of the pier body, and roughcasting is performed, so that sufficient engaging of concrete is facilitated, the shear resisting property of connecting positions is reinforced, and the stress property of a pier column is effectively improved; the pier and the bearing platform are connected through the annular mounting islands, and the shearing rings are arranged at the connecting positions, so that the shear resisting property of the connecting positions is reinforced. Through the adoption of the connection structure disclosed by the invention, the connection between the pier and the bearing platform is reliable in stress, convenient to construct, simple to operate and easy to control, the pier is simple to position, the workload of site welding and concrete casting can be effectively reduced, and the construction progress is accelerated.

Description

technical field [0001] The invention relates to the technical field of road and bridge construction, in particular to a connection structure between a ring-shaped prefabricated bridge pier and a cap. It also relates to the installation and positioning process of the prefabricated bridge piers and caps with circular cross-sections. Background technique [0002] At present, most of the pier construction of the bridge substructure in our country adopts the cast-in-place construction method. This construction method needs to block the road surface 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 consume The amount of use is large, the construction cost is high, and it directly affects the road traffic capacity of the construction site, which is incompatible with the requirements of urban construction and development. [0003] The length of the bridge...

AI Technical Summary

Problems solved by technology

However, although this document discloses a special connection relationship between the pier and the cap, it also mentions that the pier body and the cap, and between the prefabricated pier bodies need to be positioned before installation, but it does not introduce the assembly in detail. Positioning technology in construction

[0007] For example, Chinese patent CN102363946A discloses a prefabricated assembled column cap structure and its assembly and positioning process. Since prestressed steel strands need to be set in the through holes of the prefabricated columns, compared with traditional cast-in-place concrete piers, the connection method The cost of pier columns is much higher

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, Chinese patent CN202543789U discloses a connection structure between prefabricated bridge piers and caps. The top surface of the pier bottom connection section and the bottom surface of the pier body are connected by concave-convex shear keys, and dry joints (glue joints) are used on site. It reduces the workload of on-site welding and on-site concrete pouring to a certain extent, which is beneficial to quality control and speeds up the construction progress. However, the requirements for the joints between the segments are relatively high, and the connection between the segments using prestressed steel or ordinary steel bars requires more Large construction space, complex construction process

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.

Images