A construction method for the variable width section of a half-through arch bridge

Abstract

The invention discloses a construction method for the widening section of a mid-support arch bridge, which uses hoisting equipment to lift a prefabricated cast-in-place hanger so that the top surface of the cast-in-place hanger is flush with the bottom surface of the cast-in-place section; a spreader system is used Connect the two sides of the cast-in-place hanger to the two sides of the arch rib respectively; lay a formwork system for pouring the widened section on the top surface of the cast-in-place hanger, and pour concrete to form the widened section after binding the steel bars; the concrete reaches After the strength is designed, the spreader system is removed, and the cast-in-place hanger is hoisted away by lifting equipment. The invention lifts the cast-in-place hanger and connects it with the poured section by lifting equipment, and then uses a hanger system to fixedly connect the cast-in-place hanger and the arch rib, so as to carry out the construction of the widening section on the cast-in-place hanger. The invention reduces the construction risk in the construction process of the variable width section, simplifies the operation process and shortens the construction period, and realizes the maximization of economy, safety and practicability.

Description

technical field [0001] The invention relates to a construction method for a widening section of a mid-supporting arch bridge in the technical field of bridge construction. Background technique [0002] In recent years, large-scale construction of traffic road networks has been underway in various parts of our country, and bridges, as a common structural form across rivers, lakes and seas, are often used in every traffic road network. Bridges with low maintenance and repair costs are used more and more frequently in various road networks. When the arch bridge adopts the concrete-filled steel tube arch, the main girder generally adopts a widened section design at the junction of the beam and the arch. The construction usually has the following two methods: [0003] 1. Hanging basket method: Customize special hanging baskets according to the beam structure of the variable width section, and use the hanging basket to pour the concrete of the variable width section in sequence u...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a construction method for the widening section of a mid-supporting arch bridge, which overcomes the failure of conventional construction methods or the cumbersome construction process, and the large waste of materials, etc. The problem

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