Die for manufacturing prestress box girder plug plate and forming method thereof

Abstract

The invention discloses a die for manufacturing a prestress box girder plug plate and a forming method thereof and relates to the technical field of prestress box girders. The die comprises a shape-fixing device, wherein the shape-fixing device is defined by a plurality of die plates, the cross section of the shape-fixing device is a closed graph; every two adjacent die plates are detachably connected; a first positioning rod and a second positioning rod are separately arranged on first die plate and a last die plate at the connecting part of the closed graphs; and a fastening device is arranged on each of the first positioning rod and the second positioning rod. The die can prevent the shape-fixing device from extending deformation due to pressure of concrete during the forming process, and the die plates detachably connected can be conveniently dismantled. The forming method of the die is simple in operation; and after removing the fastening devices, the die is in the non-closed state integrally, so that demoulding is facilitated.

Description

technical field [0001] The invention relates to the technical field of prestressed box girders, in particular to a mold for manufacturing prestressed box girder plug plates and a forming method thereof. Background technique [0002] A large number of prestressed box girders are used in the civil engineering of expressways. The number of plug plates of prestressed box girders is large, the quality requirements are high, and the geometric structure and size requirements are high. The traditional block plate prefabricated blocks are mostly prefabricated with wooden molds. There are the following Problem: When pouring concrete, the mold is easy to tilt and move sideways, and the stability of the mold is poor; the commonly used mold adopts a fully closed mold, which is affected by the slight expansion of the concrete after pouring concrete, and it is difficult to remove the formwork; the model has low rigidity and is easily deformed by lateral pressure. As a result, the structura...

AI Technical Summary

Problems solved by technology

[0002] A large number of prestressed box girders are used in the civil engineering of expressways. The number of plug plates of prestressed box girders is large, the quality requirements are high, and the geometric structure and size requirements are high. The traditional block plate prefabricated blocks are mostly prefabricated with wooden molds. There are the following Problem: When pouring concrete, the mold is easy to tilt and move sideways, and the stability of the mold is poor; the commonly used mold adopts a fully closed mold, which is affected by the micro-swelling of the concrete after pouring concrete, and it is difficult to remove the formwork; the model has low rigidity and is easily deformed by lateral pressure. As a result, the structural size of the components does not meet the requirements; the material is mostly wood, which cannot meet the environmental protection requirements, resulting in waste of wood resources

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