One-step forming construction method of shaft bridge through cast-in-situ concrete floor

Abstract

The invention discloses a one-time molding construction method for a shaft bridge frame to pass through a cast-in-place concrete floor slab. The tooling used in the construction method includes a mold for forming a reserved hole for a shaft bridge frame and a wooden formwork for forming a cast-in-situ concrete floor slab, and the reserved hole for the shaft bridge frame is formed. The mold includes a bottom plate, a coaming vertically and fixedly installed on the bottom plate, and a cover plate arranged on the top of the coaming. The construction method includes: 1. Forming of each layer of cast-in-place concrete floor slabs and the reserved holes for the shaft bridge; 2. Shaft bridge 3. The laying of cables in the shaft bridge; 4. The construction of the fireproof layer between the cast-in-place concrete floor slabs of each layer and the shaft bridge. The invention does not require secondary pouring to form the water-stop for the reserved hole of the vertical shaft bridge frame, and does not need to lay a fireproof bottom plate on the lower surface of the cast-in-situ concrete floor slab, which reduces the construction process, avoids secondary pollution, and improves the height of the water-stop The uniformity of size and size improves the visual quality of the cast-in-place concrete floor slab.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a one-time forming construction method for vertical shaft bridges to pass through cast-in-place concrete floor slabs. Background technique [0002] In the traditional construction technology of reserved holes for shaft bridges, when concrete is poured on site to form cast-in-place concrete floors, wooden templates are laid to reserve shaft bridges in the cast-in-place concrete floors for shaft bridges to pass through. hole, and then put the vertical shaft bridge in the reserved hole of the vertical shaft bridge, and then pour the water stop platform for the second time, lay the fireproof board, and smear the fireproof mud; in the actual construction process, there are the following defects: 1. The water stop in the reserved hole of the vertical shaft bridge frame formed by the second pouring will easily pollute the lower shaft bridge frame; 2. The gap be...

AI Technical Summary

Problems solved by technology

[0002] In the traditional construction technology of reserved holes for shaft bridges, when concrete is poured on site to form cast-in-place concrete floors, wooden templates are laid to reserve shaft bridges in the cast-in-place concrete floors for shaft bridges to pass through. hole, and then put the vertical shaft bridge in the reserved hole of the vertical shaft bridge, and then pour the water stop platform for the second time, lay the fireproof board, and smear the fireproof mud; in the actual construction process, there are the following defects: 1. The water stop in the reserved hole of the vertical shaft bridge frame formed by the second pouring will easily pollute the lower shaft bridge frame; 2. The gap between the vertical shaft bridge frame and the concrete wall is small, and the operating space is limited. When the water stop with holes is left, the phenomenon of honeycomb pitting will appear due to the lack of compactness of the vibration, which seriously affects the visual quality of the concrete building; 3. It is necessary to install a fireproof bottom plate on the lower surface of the cast-in-place concrete floor, which increases the workload, and cause waste of materials; in order to solve the above defects, a one-time molding construction method should be proposed for the vertical shaft bridge to pass through the cast-in-place concrete floor slab

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