Construction method of double-limb thin-walled pier of bridge

Abstract

The invention relates to a construction method of a double-limb thin-wall pier of a bridge and mainly aims at solving the problem of slow construction speed in prior construction of the two-limb thin-wall pier of the bridge. The method comprises the following steps of: pier body reinforcement installation: wherein, the root part of the pier body main reinforcement extends into a cap part, straightthread rolling is carried out on a connecting end of the main reinforcement in a ground processing site by using a heading machine, a sleeve is connected with the threaded connecting end; rollover formwork assembly: wherein, the formworks is raised by using a tower crane, and the horizontal joint and vertical joint of the internal and external formworks are made into flat joints. Rubber stop grout is filled during installation; installation of internal and external operation platforms and a protection system; pier body concrete is lifted and put into the formworks, manual vibration is carriedout by using a plug-in vibration bar, when the concrete is poured, horizontal distribution in layers is carried out; concrete curing; the formworks are removed and turned up and circulated to the topof the pier; after completion of a first cycle of construction, a next cycle, which includes steel bar binding, formwork lifting and concrete pouring, is carried out. The method has the advantage offast construction speed.

Description

Technical field: [0001] The invention relates to a construction method of double-limbed thin-walled piers of bridges. Background technique: [0002] The double-limbed thin-walled pier is a commonly used pier form for large and medium-span highway bridges at this stage. Its structure is characterized by two parallel pier walls hinged or rigidly connected to the main girder. Reinforced concrete double-limbed thin-walled piers can increase the rigidity of the pier, reduce the peak reaction force of the main girder, and increase the beauty of the bridge. The prestressed concrete continuous rigid frame bridge adopts a pier-beam consolidation system, where the double thin-walled high pier is an ideal flexible pier, which can support the superstructure and keep the pier stable, but also has a certain degree of flexibility to meet the needs of the displacement of the superstructure , Its thrust resistance stiffness is 1 / 4 of the thrust resistance stiffness of single-limbed thin-walled p...

AI Technical Summary

Problems solved by technology

[0003] However, the existing double-leg thin-walled piers generally have the problems of slow construction speed, long construction period and high construction cost.