Prefabricated assembled hollow pier with built-in rib plates and construction method

Abstract

The invention provides a prefabricated assembled hollow pier with built-in rib plates and a construction method, and relates to the technical field of bridge construction. The hollow pier sequentiallycomprises a foundation, a bottom section, a middle section and a top cap section from bottom to top. Embedded steel bars are arranged at the top of the foundation, and stirrups are arranged on the embedded steel bars; a solid section is arranged below the bottom section, the bottom section and the solid section are prefabricated together, a connecting steel bar hole channel is reserved in the solid section, and a diameter of the connecting steel bar hole channel is 5 cm larger than that of each side of the embedded steel bar at the top of the foundation; post-cast concrete is filled in pore channels of the embedded steel bars; the rib plates are arranged on the bottom section, the middle section and the top cap section, each rib plate is provided with a connecting reinforcing steel bar, each connecting reinforcing steel bar extends out of the corresponding rib plate, and the connecting reinforcing steel bars between the sections are in lap joint with one another by more than 10 timesof the diameter of the reinforcing steel bars; and prestressed pipelines are pre-buried in the foundation, the bottom section, the middle section and the top cap section and are connected by penetrating through full-length prestressed tendons. By adopting the scheme, defects of insufficient energy consumption and low ductility of prestressed assembled piers can be overcome.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a prefabricated assembled hollow pier with built-in ribs and a construction method. Background technique [0002] At present, when bridge piers cross large rivers or oceans, the construction conditions are harsh, the wind and waves are strong, the effective time for on-site operations is short, and concrete pouring and maintenance are difficult, which is not suitable for cast-in-place construction. It shortens the on-site working time and improves the project quality; and has strong water transportation and hoisting capabilities, and the pier can be divided into large sections and assembled with large mechanical equipment, which is suitable for hollow pier with high height; in some waters at home and abroad or It has been applied in bridge engineering in sea area. [0003] Hollow bridge piers are often of high height and large cross-sectional size, and ordinary steel...

AI Technical Summary

Problems solved by technology

The segments of this connection method are only connected by prestressed beams, which have disadvantages such as insufficient energy dissipation capacity and low ductility, and are not suitable for high-seismic areas; most of them are erosive at sea and require high durability, and there is a risk of corrosion in prestressed beams. Severe corrosion will lead to connection failure and affect the safety of the structure, and the prestressed bundle is located in the tunnel, which is often difficult to inspect, repair and replace; at the same time, when the hollow pier is high and the segment length is long, the overall stability of the pier column and the Problems such as weak local stability of the pier wall

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