Manufacturing method of welding mold for initial support grid steel frame in mine method

Abstract

The invention discloses a manufacturing method of a mold for welding a grid steel frame used for mining method primary support. The manufacturing method comprises the following steps of: (1) designing the grid steel frame welding mold according to the design drawing of the grid steel frame; (2) establishing a three-dimensional model of the grid steel frame welding mold by applying revit software; and (3) laying a baseplate on the ground, laying off and positioning on the base plate by using the three-dimensional model of the grid steel frame welding mold, and then welding multiple groups of brackets different in configurations on the base plate. The manufacturing method has the beneficial effects that the manufacturing accuracy of the mold can be ensured very well, and further the ring formation quality of the grid steel frame is ensured; the manufacturing method is fast in speed; the mold is high in accuracy, stable in quality and convenient to install; the erection time in a tunnel can be shortened; the exposure duration of surrounding rocks is shortened; the ring formation as early as possible is ensured; and the safety risk and influence on surrounding environments are reduced.

Description

technical field [0001] The invention relates to a welding mold, in particular to a manufacturing method of a welding mold for the primary support grid steel frame of the mining method. Background technique [0002] In subway engineering, the Chinese-style mining method is a commonly used tunnel construction method for interval excavation. It adopts the composite lining form of grid steel frame combined with shotcrete as the initial support and molded reinforced concrete as the secondary lining in the later stage. Among them, The grid steel frame is welded by various types of steel bars and section steel, and has the advantage of being able to design different cross-sectional shapes according to different cross-sectional forms and load conditions. During the construction process, the grid steel frame needs to be processed in advance according to the type of section and the requirements of the design drawings. Each grid steel frame is made in sections, and bolted connections a...

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Problems solved by technology

The problems of the above-mentioned process are: it is difficult to control the welding quality and manufacturing precision, manual positioning is used, the production process is complicated, the error rate of multiple manual positioning measurements is high, the position of the bolt holes of the connecting plate is difficult to align during installation, the construction speed is slow and affects The progress of grid erection in the tunnel does not conform to the principle of early closure of underground excavation tunnel construction

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