Rapid machining platform and method for grid steel frames

Abstract

The invention discloses a rapid machining platform and method for grid steel frames. The machining platform comprises a horizontal support platform and a plurality of main reinforcement positioning moulds, wherein the plurality of main reinforcement positioning moulds are laid in the circumferential direction and all mounted on the horizontal support platform; the plurality of main reinforcement positioning moulds form a main reinforcement positioning device for positioning four main reinforcements in a to-be-machined steel frame segment; and each main reinforcement positioning mould comprisesa sliding seat, a connection seat and a main reinforcement positioning mechanism. The method comprises the steps of 1, adjusting the main reinforcement positioning mechanisms; 2, adjusting the positions of the main reinforcement positioning moulds; 3, mounting the main reinforcements; 4, fixing dowels of the main reinforcements; and 5, fixing rectangular stirrups. The machining platform and method are reasonable in design, simple and convenient in strengthening and good in using effect; and the plurality of movable main reinforcement positioning moulds are adopted to position the steel framesegments and the main reinforcement positioning mechanism on each main reinforcement positioning mould can be adjusted according to the widths and thicknesses of the machined steel frame segments, sothat the machining demands of the steel frame segments with different specifications can be satisfied.

Description

technical field [0001] The invention belongs to the technical field of tunnel grid steel frame processing, and in particular relates to a grid steel frame rapid processing platform and a processing method. Background technique [0002] Tunnel arch frame is used to support caves or bunkers during the construction of tunnel projects (such as highway tunnel projects, railway tunnel projects, military concealed projects, mines, coal mines, iron mines and other roadways, water diversion tunnels for hydropower stations, etc.) The steel brackets are generally made of section steel or steel bars according to a certain radian and length, and are made into individual units, and then installed at the construction site, followed by anchor rod installation, longitudinal connection steel bar welding and steel mesh welding, and finally Shotcrete construction is carried out, and the initial support in the tunnel construction is completed after the anchor shotcrete is completed. Tunnel arch...

AI Technical Summary

Problems solved by technology

[0003] At present, when constructing tunnels, there are mainly the following problems in the processing of grid arches (that is, grid steel frames): First, the number of grid steel frames used for the initial support of tunnels is huge, and the processing volume of grid steel frames is large: Each grille steel frame is spliced ​​by multiple steel frame segments, and the multiple segments of the grille steel frame need to be processed separately, which further increases the processing amount of the grille arch frame, and the processing process costs Time-consuming, large processing costs are required, and the input of manpower and material resources is very large, especially for the construction of long tunnels. The processing volume of the grid arch frame is even greater; There are many specifications: grid steel frames of different specifications are required in tunnel sections with different surrounding rock levels in the same tunnel, and the structures and sizes of grid steel frames supported on tunnel sections with different structures and different settlements are different. As a result, there are many specifications of the grid steel frame, which further increases the difficulty of processing the grid steel frame; third, since the tunnel construction is carried out based on advanced geological forecast and monitoring measurement information, different geological conditions need to dynamically adjust the corresponding tunnel The reserved deformation of the section will cause corresponding changes in the specifications and dimensions of the grid steel frame processing, and the number of grid steel frames that need to be processed each time is not large, and mass production cannot be realized because the tunnel is located in the construction area. Uncertainty in the change of surrounding rocks, intermittent bottoming occurs, which further affects the processing speed and quality of the grid steel frame, making the processing of the grid steel frame more difficult; fourth, the same specification of the grid steel frame During processing, it is necessary to use a set of molds with the same structure and size as the grid steel frame to be processed. Since there are many specifications of the grid steel frame to be processed, the number of molds required is huge, and the processing volume of the mold is huge. , the mold input cost is very high; Fifth, when using molds to process the grille steel frame, an I-beam with the same radian as the processed steel frame is usually used as the radian reference base for processing. The radian reference base is inconvenient to process and the processing efficiency Low cost and serious waste. At the same time, the processing quality of the radian reference base is not easy to guarantee, and the proficiency and processing skills of the processing personnel are very high. It takes more than 3 days for a skilled worker to process a set of molds. The mold processing cost is very high, and it is labor-intensive and time-consuming. ; Sixth, when using the mold to process the grid steel frame, the arc reference base and the main reinforcement positioning plate used can only match the grid steel frame of one specification, and the arc reference base and the main reinforcement positioning plate cannot be adjusted. The conversion can be realized, further increasing the difficulty of processing, and the processing efficiency is low; sixth, the number of molds required is large, and the problems of storage and unlucky are prominent

Images