Formwork and bracket combining structure of vase pier of viaduct and application method

Abstract

The invention discloses a formwork and bracket combining structure of a vase pier of a viaduct and an application method, and belongs to the field of construction of vase piers of urban viaducts. The formwork and bracket combining structure comprises a lower bracket, a curve section formwork bracket, an upper bracket, cover beam side formwork brackets and a cover beam bottom formwork bracket, wherein the lower bracket is mounted at the tops of straight line section formworks for allowing straight line section pier columns to be cast; the curve section formwork bracket is arranged on the lower bracket and used for allowing curve section formworks to be mounted; the upper bracket is mounted at the tops of the curve line section formworks for allowing curve line section pier columns to be cast; the cover beam side formwork brackets and the cover beam bottom formwork bracket are arranged on the upper bracket and used for allowing a cover beam formwork to be mounted. Through the design of the formwork and bracket combining structure and the combination between the formwork and bracket combining structure and a corresponding application method, the construction of the vase pier can be perfectly realized, and the formwork and bracket combining structure and the application method do not need to occupy a large construction region space, so that the pass of construction vehicles is facilitated. The formwork and bracket combining structure further has the advantages of being simple in construction, convenient to use, safe in structure, economical, reasonable and the like, can reflect normalized and standardized construction, and has high economic benefits and high social benefits.

Description

technical field [0001] The invention relates to the field of construction of vase piers of urban viaducts, in particular to a combined structure of viaduct vase pier formwork supports and a method of use thereof. Background technique [0002] In modern large and small cities, the traffic is crowded, the buildings are dense, and the streets are difficult to widen. Therefore, when designing urban viaducts, firstly, the impact on the landscape should be considered, and secondly, while considering the structural requirements and strength requirements of the structure itself, It is also necessary to pay attention to the artistic shape of the bridge, put the beautification design of the structure in a prominent position, and try to coordinate with the surrounding environment as much as possible and integrate into one. The structural shape and the size ratio of each part should be coordinated with each other. The beam structure stretches smoothly and pays attention to its line shap...

AI Technical Summary

Problems solved by technology

The erection of floor supports requires foundation treatment to avoid the occurrence of cracks in pier columns and cover beams caused by the settlement of supports, and the floor supports occupy a large space in the construction area, which affects the passage of construction vehicles and is not conducive to construction operations

[0005] At the same time, the existing single-column solid pier column or double-column pier cover beam without support formwork support combination construction methods, such as pre-embedded method, hoop method, suspension method, etc. are not suitable for the construction of vase pier, its main defect Yes: the pre-embedded method needs to set the section steel passing through the pier column in the pier column or set the corbel on the pier column as a support for the formwork and bracket, which will cause great damage to the pier column and also affect the appearance; the hoop The method is to install the hoop at the appropriate part of the pier column and clamp it to the pier column, and use the friction between the hoop and the pier column to transfer the weight support of the formwork and the cover beam to the pier column, which is suitable for the slender vase pier column It is difficult to provide enough friction to transfer the load safely, and it will also damage the concrete on the surface of the pier column and affect the appearance; the suspension method requires pre-embedded section steel in the pier column, and the pre-embedded section steel provides suspension force to support the weight of the formwork and cover beam. However, the pier column of the vase has a small cross-section, and the pier column itself is densely packed with steel bars and has a curved shape. It is difficult to provide a embedment space for the section steel, and the force of the section steel may cause cracks in the pier column, which is not conducive to structural safety.

Moreover, as far as the construction of pier columns is concerned, that is, pier columns without cap beams, some solid high piers or hollow high piers are usually constructed by sliding form or turning form without support, and there is also the practice of setting up an operating platform on the formwork, but this This kind of simple operation platform has low bearing capacity, and is not suitable for the construction of small curved pier columns of vase piers, because the vase pier is also equipped with cover beams and cover beam supports required for the construction of cover beams and the tension of cover beams with large construction loads. Prestressing equipment

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