Temporary rolling bearing applicable to incremental launching method construction

Abstract

The invention discloses a temporary rolling bearing applicable to incremental launching method construction. The temporary rolling bearing comprises a plurality of cast steel rollers, a hydraulic jack, a sliding plate, two limiting plates and a fixed steel plate. The fixed steel plate is horizontally arranged, and each corner of the fixed steel plate is connected to an embedded part of the top surface of a bridge pier. The lower end of the hydraulic jack is installed in the middle of the surface of the fixed steel plate. Each limiting plate is a U-shaped plate arranged vertically, and the two limiting plates are arranged on the outer side of the surface of the fixed steel plate in the mode that the openings are opposite. The sliding plate is horizontally arranged at the upper part of the space formed by the two limiting plates in an enclosure mode, and the middle of the bottom surface of the sliding plate is fixed to the hydraulic jack. The cast steel rollers are divided into multiple columns and are arranged on the surface of the sliding plate side by side. According to the invention, the friction force generated in the incremental launching process can be lowered so that horizontal moving of bridge piers can be reduced; the beam bottom elevation can be regulated through lifting of the hydraulic jack. In addition, the temporary rolling bearing is reasonable and simple in structural design, low in cost and convenient to use, and therefore the construction operation process can be simplified and the time and the labor can be saved.

Description

technical field [0001] The invention belongs to the technical field of bridge design and construction, and in particular relates to a temporary rolling bearing suitable for construction by the jacking method. Background technique [0002] The jacking method is mostly used in the construction of prestressed reinforced concrete equal-section continuous beam bridges and cable-stayed bridges. It refers to the temporary sliding of the beam body through the top of each pier when the beam body is poured or assembled segment by segment at the bridge head and pushed longitudinally by a jack. The construction method of the bearing surface in place. In the jacking method construction, the support system is divided into temporary sliding bearings and sliding bearings integrated with permanent bearings. When using temporary sliding support to push, after the main beam is pushed into place, it is necessary to use a jack to lift the main beam, then remove the slideway and the concrete pad...

AI Technical Summary

Problems solved by technology

When using temporary sliding support to push, after the main beam is pushed into place, it is necessary to use a jack to lift the main beam, then remove the slideway and the concrete pad at the base of the slideway, and then install the formal support. The disadvantage of this construction process is that complex

Although the construction process can be simplified by using the sliding support integrated with the permanent support, the structure of this device is complex and the cost is high. Therefore, temporary sliding supports are often used in the construction of the pushing method in my country

In addition, sliding friction is generated in the above two support systems, which is relatively large compared with rolling friction

Because the horizontal force generated by friction will cause the horizontal displacement of the pier, it will have an adverse effect on the pier, especially on the flexible pier.

Images