One-time molding construction method for reserved residential air duct without supporting formwork

Abstract

The invention relates to a form-erection-free one-step molding construction method for a reserved residence ventilating duct. The form-erection-free one-step molding construction method comprises the steps of placing an embedded part on a position of a reserved hole and fixing the embedded part and a formwork together before pouring concrete on a structural layer of a floor slab, wherein the section of the embedded part is a detachable box body shaped like a Chinese character Tu, the length of the upper part of the embedded part is smaller than the size of the designed ventilating duct, and the length of the lower part of the embedded part is larger than the size of the designed ventilating duct, so that the reserved hole formed after pouring the structural layer forms an upper corner part which is inwards protruded; pouring concrete on the structural layer of the floor slab, and dismounting the formwork after finishing pouring; then, dismounting the embedded part, embedding and fixing the upper opening surface of the ventilating duct and the lower part of the structural layer of the reserved hole together, and temporarily fixing the lower opening surface of the ventilating duct and the upper part of the structural layer of the reserved hole by using a wedge block; and sealing a gap at the periphery of the reserved hole, taking out the wedge block during constructing on the ground of the floor slab, and then, pouring concrete to fill the gap. The form-erection-free one-step molding construction method is simplified in process and capable of improving the construction quality.

Description

technical field [0001] The invention relates to the construction of air ducts in residential buildings, in particular to a one-time molding construction method for reserved air ducts in ordinary residential buildings without supporting molds. Background technique [0002] At present, the construction of the air duct project in the exhaust system of multi-storey and high-rise modern residential buildings is mainly concentrated on the construction after the main body is completed. In the later stage of construction, the general construction process is: layer support installation → hanging wire → installation of air duct → temporary fixation → two Secondary hanging hole filling→maintenance→installation of upper air duct, but this method leaves a hole 5cm-10cm larger than the finished material in the main stage, and planting reinforcement technology is required when installing the layer support. After the air duct is in place, the gap between the air duct and the reserved hole i...

AI Technical Summary

Problems solved by technology

[0003] 1) In the process of pouring concrete, it is easy to cause mold expansion during secondary pouring or insufficient vibration during concrete pouring, and water leakage in kitchens and bathrooms, etc.

[0004] 2) The resulting gap requires manual dismantling of the safety operation platform, which increases the workload of labor and increases the amount of materials used

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