Bridge jacking counter-force device suitable for narrow and small space between beam bottom and cover beam

Abstract

The invention discloses a bridge jacking reaction force device suitable for the narrow space between the bottom of the beam and the cover beam. The platform structure on the side, the high-strength bolt hoop used to connect the load-bearing beam and the platform structure, and the clamping device used to fix the entire device and the cover beam. The two load-bearing beams cross the narrow gap between the beam slab and the cover beam, the load-bearing beams are reliably connected to the platform structure through high-strength bolt hoops, and the entire reaction force device is reliably connected to the cover beam through the clamping device. The jack is placed on the platforms on both sides and the bridge jacking operation can be carried out. The bridge jacking device of the present invention has the advantages of small self-weight, high bearing capacity, and wide application range. It can save a lot of manpower and material resources when used in the jacking of hollow slab bridges in the narrow space between the beam bottom and the cover beam.

Description

technical field [0001] The invention relates to the field of bridge maintenance and reinforcement, in particular to a bridge jacking reaction force device suitable for a narrow space between a beam bottom and a cover beam. technical background [0002] Bridge jacking is a relatively common process in bridge maintenance and reinforcement construction. The early construction of hollow slab bridges in China has the characteristics of small gaps between the beam slab and the cover beam. During the jacking operation of this type of bridge, the gap between the beam slab and the cover beam cannot be directly placed with a jack. At present, there are two commonly used methods in China: the common method 1 is to build a steel structure jacking platform from the bottom of the bridge from bottom to top , and then place the jack on the erected steel structure platform for bridge jacking operations. This method has the following disadvantages: (1) The construction scale of the steel st...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: (1) The construction scale of the steel structure platform is large, and the economy is poor; (2) For the general pile-type piers, the foundation platform foundation needs to be poured again, and the construction period is long; (3) It is limited by the height of the bridge , when the pier height is high, it is difficult to ensure the stability and safety of the steel structure jacking platform; (4) It is greatly affected by the span of the bridge, when the bridge is a river or road, the erection of the steel structure jacking platform will be more restricted

The second common method is to install steel corbels on the cover beam. This method needs to implant steel bars on the cover beam, which will cause a certain degree of damage to the cover beam. It is not an optimal method

Images