Bridge prefabricated hollow pier stud connecting structure and construction method thereof

Abstract

The invention relates to a bridge prefabricated hollow pier stud connecting structure. The bridge prefabricated hollow pier stud connecting structure is characterized by comprising a pier stud foundation and a prefabricated hollow pier stud; the pier stud foundation is provided with an insertion groove for the prefabricated hollow pier stud, the cross section of the insertion groove is in the shape of a big-end-up trapezoid, and an installation locating block is arranged at the bottom of the insertion groove; the prefabricated hollow pier stud is arranged on the upper portion of the pier stud foundation, a T-shaped steel plate is arranged at the joint between the prefabricated hollow pier stud and the top face of an opening of the insertion groove, and gradienters are symmetrically arranged on rib plates of the T-shaped steel plate; a horizontal pre-stressed anchor cable is arranged in the pier stud foundation, a vertical pre-stressed anchor cable is arranged in the prefabricated hollow pier stud, and the hollow position of the prefabricated hollow pier stud is filled with micro-expansion concrete to form a concrete core segment. According to the bridge prefabricated hollow pier stud connecting structure, by the adoption of the precasting process, the construction speed is high, the mutual connection strength is high, the overall stress performance is good, and good technical and economic benefits are obtained. The invention further discloses a construction method of the bridge prefabricated hollow pier stud connecting structure.

Description

technical field [0001] The invention relates to a bridge prefabricated hollow pier column connection structure and construction method, which belongs to the field of bridge engineering and is suitable for the connection construction between prefabricated bridge piers and foundations with fast construction speed, high interconnection strength and good overall mechanical performance. Background technique [0002] With the continuous advancement of my country's large-scale urban construction process at this stage, energy conservation, environmental protection, and low carbon have gradually become the theme of my country's economic development. One of the main challenges facing the current design of urban bridge structures is that in addition to the safety and durability of the bridge structure, owners and residents also require rapid construction to reduce interference with surrounding traffic, shorten traffic jam time, and reduce transport vehicles and construction. various no...

AI Technical Summary

Problems solved by technology

[0003]At present, the connection between the prefabricated pier body and the cap (foundation) generally adopts the connection reinforcement reserved at the top of the cap and the bottom of the prefabricated pier body, and the pier body is hoisted in place Finally, the on-site welding of the steel bars is completed, and the method of pouring the concrete of the connecting section has the following shortcomings: (1), in terms of force, the cast-in-place concrete connecting section directly bears the superstructure load transmitted by the bridge pier and the self-weight of the pier body Load, under the action of unbalanced bending moment, there is a shear slip surface in the connecting section, this part of the structure is the weak link of the whole pier body; (2) In terms of construction and hoisting, the prefabricated pier body generally adopts short guide Positioning, it is very difficult to accurately locate the bridge piers weighing hundreds of tons; (3) In terms of construction operations, it is necessary to weld the steel bars and cast-in-place concrete for the connection section on site, which increases the workload

[0005] To sum up, although there are some methods of connecting prefabricated piers and foundations in bridge engineering, and various treatment measures and methods have achieved good reinforcement effects under suitable engineering conditions, most construction processes still have weak shear resistance and structural problems. Problems such as low connection strength, poor durability, and poor overall mechanical performance

Images