Formwork early-removal construction method allowing three-dimensional space size to be adjustable

Abstract

A formwork early-removal construction method allowing the three-dimensional space size to be adjustable comprises the following steps that S1 an early-removal supporting system is installed; S2 formworks are removed; S3 a main beam (4) is removed. The early-removal supporting system comprises a formwork part (16), a secondary beam part (17), a main beam part (18), a hollow screw double-adjustment knocking-down type early-removal supporting head part (19), an independent supporting part (20) and a tripod part (21). According to the formwork early-removal construction method, the one-time input number of the formworks can be greatly reduced, the arrangement number of the formworks is reduced by 1 / 3-1 / 2, service lives of the formworks and service life of the supporting system can be prolonged, construction costs are saved by more than 20%, the construction period is effectively shortened, construction speed is increased, and work efficiency is improved by more than30%.

Description

technical field [0001] The invention relates to a formwork early demolition construction method with adjustable three-dimensional space size. Background technique [0002] During the construction of the floor structure in construction engineering, formwork and support systems need to be supported, and the formwork and support systems must be removed after the concrete strength meets the design requirements. In addition to the concrete design strength, the demolition conditions are related to the component span. When the component span is ≤ 2m, the design concrete strength grade value is ≥ 50%; when the component span is > 2m, ≤ 8m, the design concrete strength grade value is ≥ 75%. Demolition; when the span of the component is ≥ 8m, the design concrete strength grade value ≥ 100% is to be demolished. The formwork and support in the conventional practice need to reach 100% to be removed, and the early formwork removal technology is to use the time difference between the r...

AI Technical Summary

Problems solved by technology

The main problem of this kind of support system is: it is necessary to add maintenance support at the narrow formwork position to form an early demolition support system; due to the use of plywood, the spacing between the secondary beams is relatively close, but the wooden beams of the same specification as the main beam are used, which can be said to be Overuse and waste of materials

Its main problem is: in addition to the independent support under the main beam, another maintenance support is required

[0009]5. Some of the existing early dismantling support heads in China can be adjusted in height but cannot be shot down, and some can be shot down but cannot adjust the height of the primary and secondary beams, or the support head The design of the wing support is unreasonable, and the primary and secondary beams carried are double Φ48×3.5 steel pipes or wooden squares, which are not suitable for other primary and secondary beams

[0010]The overseas support system for early removal is advanced in technology and superior in product quality. Yes: the primary and secondary beams use wood I-beams of the same specification, the amount of wood is large, and the secondary beams are overpriced; foreign countries have support heads that can be shot down, and the formwork removal efficiency is high. They are made of square steel pipes, but the height of the wing brackets cannot be adjusted. Both primary and secondary beams are 200mm high I-shaped wooden beams

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