Self-lifting sliding and turnover construction system and construction method

Abstract

The invention discloses a self-lifting sliding and turnover construction system and a construction method. The system comprises a framework type combination crown block hanging bracket device and a semi-automatic turnover device. The construction method comprises steps as follows: construction of reinforcing steel bars of a pier body, large-area formwork bracket splicing, sliding formwork bracket splicing, self-lifting hanging bracket splicing, concrete pouring, sliding formwork bracket sliding rising, large-area formwork turnover and next stage of reinforcing steel bar construction. A self-lifting technique can be adopted, auxiliary construction by mechanical equipment such as a tower crane, a truck crane and the like can be omitted, high-pier construction is realized with the self-lifting technique, and the method guarantees the construction speed of a sliding formwork and the appearance quality of a turnover formwork without relying on external machines.

Description

technical field [0001] The invention belongs to the field of bridge construction, and in particular relates to a self-elevating and slipping construction method. Background technique [0002] my country's highway industry is changing with each passing day. For regional economic development, more expressways extend into deep mountains, or cross rivers, lakes, rivers and seas. Therefore, the design of high piers in bridge engineering is very common. At present, there are usually three types of high pier construction in my country: turning formwork, sliding formwork, and climbing formwork. In view of the high construction technology requirements and high construction costs of climbing formwork, climbing formwork is mostly used in super-large bridge main pier projects, and the number is more Many ordinary high piers are usually constructed by overturning or sliding form. However, the overturning and sliding form construction methods have the following problems: [0003] The ov...

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Problems solved by technology

[0006] The surface quality of slipform construction structures is poor. Due to the technical characteristics of the slipform construction method, the steel formwork must constantly rub the concrete surface during construction, and there are inevitably gaps between the steel formwork and the concrete, which makes the cement produced by concrete vibration The slurry will flow down the side wall of the pier and pollute the apparent quality of the pier

[0007] Slipform construction workers are labor-intensive. Since slipform construction is continuous construction, workers must work almost without interruption, which consumes a lot of physical energy, especially in summer, which is prone to heatstroke and other situations.

[0008] Slipform construction is prone to decrease in the quality of steel bar binding. Since slipform construction is uninterrupted construction, sometimes in order not to affect the construction period, when the supervision is not in place, problems such as unqualified steel bar spacing will occur, which will affect the construction quality.

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