A Construction Method of Simultaneously Casting Two Structural Columns at Deformation Joints

Abstract

A construction method for simultaneously casting two structure columns at a deformation joint comprises the steps that an integrated steel formwork for the two structure columns is customized; two bayonets are arranged at the center position of the inner side face of each side formwork; each inner formwork is customized and is disconnected from the middle, and the disconnected portions are connected through hinges; two structure column steel reinforcement cages are bound on the surface of a bearing platform, two end formworks and a side formwork are installed outside the steel reinforcement cages; two inner formworks are inserted into a gap between the two steel reinforcement cages; a plate-shaped air cushion is inserted into the gap between the two inner formworks; the other side formwork is installed; the air cushion is fully aerated; and concrete of the two structure columns is poured at the same time. The construction method for simultaneously casting the two structure columns at the deformation joint has the beneficial effects that the construction process of the two structure columns can be completed through one-time casting, and therefore the work efficiency can be greatly improved; a chemical solvent is not needed, so that the health of operation personnel cannot be harmed, and environmental protection is facilitated; and the surfaces of the structure columns are flat, follow-up treatment is not needed, and the construction method is convenient and rapid to execute.

Description

technical field [0001] The invention belongs to the technical field of subway structure construction, in particular to a construction method for simultaneously pouring two structural columns at deformation joints. Background technique [0002] Subway is a form of railway transportation, referring to an urban rail transit system that mainly operates underground. Each subway line must be equipped with a joint maintenance depot to conduct regular maintenance on operating vehicles. At present, the main support structure of the joint maintenance depot is made of reinforced concrete piles in the foundation by the cast-in-place method, and then the caps flush with the ground are made by the cast-in-place method on the top of the reinforced concrete piles, and then the surface of the caps is cast-in-place The structural column is made by law, and then the beam is erected on the top of the structural column. Such as figure 1 As shown, usually two structural columns 2 with a distan...

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Problems solved by technology

If the size of the structural column is small, the wooden formwork can still be used for construction according to the above method, but because the size of the structural column 2 in the joint maintenance warehouse is relatively large, the wooden formwork cannot meet the stress requirements of pouring concrete, so steel formwork is required construction; but because the thickness of the steel formwork is greater than 100mm, and the distance between the two structural columns 2 is only 100mm, so after the construction of a structural column 2, the gap between the two structural columns 2 will not be able to be supported for The steel formwork of the second structural column 2, so the other structural column 2 will not be able to be constructed. At this time, the only way to fill the deformation joint with 10cm extruded plastic board is to act as the formwork. After the concrete is poured, the second After the second structural column 2, the extruded board will stick to the surface of the second structural column 2, so it is necessary to use a chemical solvent to dissolve the extruded board and remove it, but this treatment will cause the second structural column 2, honeycomb pockmarks are formed on the surface, which affects the appearance of the structural column 1, so follow-up treatment is required, which is very troublesome, and the use of chemical solvents to dissolve extruded boards is a toxic operation, which will undoubtedly affect the health of operators, and polluted environment

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