Positioning construction method for top reinforcing mesh in railway bridge support platform

Abstract

The invention discloses a positioning construction method for a top reinforcing mesh in a railway bridge support platform, which is characterized by comprising the following steps of: firstly, erecting steel pipe brackets on the basis of drilled pile heads in a support platform or concrete cushion layers in foundation pits; forming a top reinforcing mesh by biding reinforcement bars with the steel pipe brackets as supports; arranging steel pipe cross arms in the reinforcing mesh at intervals; erecting both ends of each steel pipe cross arm on templates at both sides of the support platform; arranging lifting hooks on the steel pipe cross arms; lifting the top reinforcing mesh by the lifting hooks to separate the top reinforcing mesh from the support of the steel pipe brackets; removing the steel pipe brackets for recycling; maintaining the design position of the top reinforcing mesh by the steel pipe cross arms and the lifting hooks; and embedding the top reinforcing mesh together with the lifting hooks into concrete during subsequent concrete pouring. The invention recycles the steel pipe brackets and effectively improves the current conditions of more consumed material, low recycling rate and difficulty in construction of the traditional railway support platform reinforcement bar installation construction support system.

Description

technical field [0001] The invention relates to a positioning method for a top-layer reinforcement mesh sheet in a bearing platform of a railway bridge. Background technique [0002] With the rapid development and large-scale construction of passenger dedicated lines and high-speed railways in my country, a large number of railway bridge structures are used. The lower part of the railway bridge mostly adopts pile cap foundation. In the pile cap foundation, the cap reinforcement is generally divided into top layer reinforcement and the bottom steel bars, and the sides are connected with steel bars with smaller diameters to form a "box" shape. During the construction period, the steel mesh on the top of the cap must be fixed in the form of a bracket, otherwise the accuracy of the elevation of the mesh cannot be guaranteed, and the mesh will not have a large underarch. The current support system mostly adopts Φ48×3.5mm steel pipe, Φ20~Φ25 steel bar support, and plum blossom-sha...

AI Technical Summary

Problems solved by technology

During the construction period, the steel mesh on the top of the cap must be fixed in the form of a bracket, otherwise the accuracy of the elevation of the mesh cannot be guaranteed, and the mesh will not have a large underarch

The current support system mostly adopts Φ48×3.5mm steel pipe, Φ20~Φ25 steel bar support, and plum blossom-shaped layout, which directly supports the top layer of the steel mesh sheet of the platform cap. The support system cannot be taken out during and after construction, and the corresponding structure cannot be reused. Therefore, cause large investment

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