An arch bridge deck structure dismantling device based on arch rib support

Abstract

The invention relates to the technical field of bridge construction, in particular to an arch bridge deck structure dismantling device based on arch rib support and stress. It includes a bracket and a lifting mechanism; the bracket includes a pair of steel pipe pile groups symmetrically arranged on both sides of the arch bridge body, each steel pipe pile group includes more than four supporting piers distributed along the direction of the arch bridge body; each supporting pier at least includes Two steel pipe piles; the hoisting mechanism includes support beams evenly distributed on the arc-shaped section of the arch rib, and each support beam is horizontally arranged parallel to the arch bridge, and the lower end of each support beam passes through a pair of support mechanisms and the corresponding upper end of the arch rib For fixed connection, an electric hoist crane is suspended on each support beam to lift the dismantled parts of the arch bridge deck structure. Therefore, the present invention makes full use of the original bearing capacity of the arch rib of the old arch bridge, provides the supporting force of the suspension beam of the electric hoist crane, carries out the demolition operation of the bridge deck structure, reduces the use of large mechanical equipment, and has important significance for the demolition of the deck structure of the arch bridge. .

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to an arch bridge deck structure dismantling device based on arch rib support and stress. Background technique [0002] With the rapid development of the economy and the rapid growth of traffic volume, the original old highway bridges can no longer meet the existing traffic demand, coupled with the insufficient original design carrying capacity of the old bridges, the long operation time, and the lack of good protection measures for the bridges, etc. The reason is that the old bridges often have different degrees of damage, and their safety performance cannot be effectively guaranteed, so the old bridges need to be demolished and rebuilt. [0003] The stress system of the arch bridge is complex, and the dynamic balance of the force of the arch bridge structure must be maintained during the demolition process. The demolition is difficult. The arch bridge deck structure in...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of the economy, the traffic volume has increased rapidly. The original old highway bridges can no longer meet the existing traffic needs. In addition, the original design bearing capacity of the old bridges is insufficient, the operation time is long, and the bridges lack good protection measures, etc. The reason is that old bridges often have different degrees of damage, and their safety performance cannot be effectively guaranteed. Therefore, old bridges need to be demolished and rebuilt.

[0003] The stress system of the arch bridge is complex, and the dynamic balance of the arch bridge structure must be maintained during the demolition process, which makes demolition difficult. Difficulty and workload

[0004] The traditional bridge demolition work often uses support removal, which refers to the construction of supports, and the removal of arch bridge beams by manual or mechanical means. The support structure often used in this method is a full-height support, which greatly limits the space under the arch bridge and is not conducive to mechanical equipment construction. Second, crawler cranes are often used in construction to remove beams of arch bridges. This type of method requires a large space for large-scale machinery and equipment construction, and takes a long time. It has a great impact on the traffic and buildings in the adjacent area. Pollution is caused, and a great safety hazard is also buried in the bridge demolition operation.

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