Assembled steel truss floor deck with detachable bottom template and adjustable thickness and construction method

Abstract

The invention discloses a soffit-formwork-detachable thickness-adjustable assembly type rebar truss floor support plate and a construction method. The soffit-formwork-detachable thickness-adjustable assembly type rebar truss floor support plate is characterized in that hook connecting pieces are arranged, hook heads of hooks are connected to bottom web member rebars of a rebar truss in a hung manner, and adjustable nuts are assembled to vertical straight rod segments of the hooks; pull rods are hinged to the adjustable nuts, when the pull rods rotate and are in the level state, rod heads protrude and abut against a soffit formwork, the hook heads are firmly fixed to the web member rebars, and the soffit formwork can be fixed; and rod bodies of the pull rods are pulled downwards so that the hook heads of the hooks can swing and disengage from the corresponding web member rebars, and disassembly of the hook heads and the soffit formwork is achieved. By the adoption of the soffit-formwork-detachable thickness-adjustable assembly type rebar truss floor support plate and the construction method, in the floor support plate construction process, the overall stability of the rebar truss is good, a panel of the formwork can be detached, the detaching strength is reasonable, recycling of the soffit formwork and the hook connecting pieces is facilitated, and the soffit-formwork-detachable thickness-adjustable assembly type rebar truss floor support plate and the construction method are suitable for formworks in the forms of plywood, sheet steel, thick steel plates and the like.

Description

technical field [0001] The invention relates to an assembled reinforced truss floor slab with detachable bottom formwork and adjustable thickness, which is suitable for on-site pouring or factory prefabrication of concrete floor slabs in construction engineering, and belongs to the technical field of building components. Background technique [0002] At present, with the vigorous development of my country's construction industry, the design and construction technology of floor slabs is constantly improving. The traditional way of making floor slabs is due to the cumbersome reinforcement, heavy formwork workload, difficulty in guaranteeing construction quality, poor construction energy consumption, and environmental pollution. Many problems, such as more serious ones, are no longer in line with the development concept of green, low carbon and environmental protection. In recent years, there has been a steel truss floor slab that does not require formwork, and the steel truss i...

AI Technical Summary

Problems solved by technology

Most of the steel truss floor decks in the prior art are fixedly connected by spot welding of steel trusses and galvanized profiled steel plates, and then integrally poured on the floor. Because of the strip-shaped indentations on the surface of the profiled steel plates, unevenness will appear. For example, for office buildings with ceiling requirements, if decoration is required in the later stage, it is difficult to plaster and level it. If the profiled steel plate is torn off after completion, it is necessary to manually destroy the steel truss and galvanized formwork However, due to the tight combination of the profiled steel plate and the concrete, it is difficult to tear off the profiled steel plate, and even need to use a cutting machine, which greatly increases the workload and difficulty of work

At the same time, in the process of destroying the solder joints and separating from the cast-in-place concrete, the removed formwork has been severely damaged and cannot be reused, which is labor-intensive and cost-intensive

[0003] The invention patent specification with the application number 201310369425.5 and the authorized announcement number CN103397728B discloses a combined steel truss floor deck with detachable formwork panels and adjustable thickness, which solves the waste of thin steel plates and bottom slabs caused by the steel truss floor slabs. The problem that the thickness of the mold plate cannot be adjusted

However, the integrity of the steel truss is poor, and under the action of the load, it is prone to large deformation, solder joints falling off, etc., which affect its normal use; and the supporting fasteners rotate under the action of the construction dynamic load, causing the hook to appear. This will lead to grout leakage during the construction stage of the floor, and even damage to the entire pouring system; although the connection between the hook head and the bottom of the web has been loosened during disassembly, the hook head is still embedded in the solidified concrete, so that a large amount of labor is still required for disassembly. Torque, the force used to disassemble the bottom formwork of the reinforced truss floor deck is not very reasonable

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