Pre-tensioned prestressing steel pipe high-strength concrete superposition bridge pier and construction method thereof

Abstract

The invention discloses a pre-tensioned prestressing steel pipe high-strength concrete superposition bridge pier and a construction method of the pre-tensioned prestressing steel pipe high-strength concrete superposition bridge pier. The bridge pier comprises steel pipes, wherein the steel pipes are provided with multiple prestressed tendons, high-strength concrete is poured among the inner walls of the steel pipes and the prestressed tendons, and the steel pipes, the prestressed tendons and the high-strength concrete form a core column; normal concrete is poured outside the core column to form the superposition bridge pier, and the interior of a traditional reinforced concrete bridge pier is provided with a plurality of prefabrication steel pipe high-strength concrete core columns with the vertical prestressing tendons; after the installation construction of the prestressing steel pipe high-strength concrete core columns is completed, a reinforced concrete skeleton frame of the bridge pier is bound and exterior concrete is poured, so that the vertically-prestressed steel pipe high-strength concrete superposed column pier with internal and external concrete of the steel pipe poured at different periods is formed, wherein the internal prestressed core column is fabricated by adopting a pre-tensioning way. With the adoption of the pre-tensioned prestressing steel pipe high-strength concrete superposition bridge pier and the construction method, the aseismic safety and effectivity of the existing bridge pier structure are effectively improved, and pre-tensioned prestressing steel pipe high-strength concrete superposition bridge pier has the advantages of high carrying capacity, good earthquake-resisting property, convenience in construction and self reset.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a pretensioned prestressed steel pipe high-strength concrete composite bridge pier and a construction method thereof. Background technique [0002] As a key component of bridge structure, the seismic design of bridge piers has always been an important research topic in the field of bridges. my country's current railway bridges and highway bridges mainly use reinforced concrete piers. It should be noted that while reinforced concrete piers have the advantages of high structural rigidity, good fatigue performance, good moldability and reasonable cost, they also generally have weak stirrup restraint, low ductility, low shear strength and poor seismic performance. Due to the low shear resistance, compressive bearing capacity and deformation capacity of bridge piers, shear failure, combined compression-bending-shear-torsion failure and overturning collapse are ...

AI Technical Summary

Problems solved by technology

It should be noted that while reinforced concrete piers have the advantages of high structural rigidity, good fatigue performance, good moldability and reasonable cost, they also generally have weak stirrup restraint, low ductility, low shear strength and poor seismic performance. Due to the low shear resistance, compressive bearing capacity and deformation capacity of bridge piers, shear failure, combined compression-bending-shear-torsion failure and overturning collapse are prone to occur. In recent years, many earthquakes at home and abroad have reinforced Concrete bridge piers were severely damaged and difficult to repair. Earthquake damage occurred, which caused great difficulties for disaster relief and post-disaster repair and reconstruction work during the earthquake.

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