Prefabricated high-strength concrete pier as well as forming mold and manufacturing method of prefabricated high-strength concrete pier

Abstract

The invention discloses a prefabricated high-strength concrete pier as well as a forming mold and a manufacturing method of the prefabricated high-strength concrete pier. The pier comprises a pier body, steel framework cages and a hoisting hole; the outer contour shape of the cross section of the pier body is formed by combination of more than four straight sections and more than four circular arcsections; all circular arc sections are positioned at the same circumference; the outer surface of the bottom end of the pier body is provided with a concave-convex groove section; the hoisting holeis annularly arranged along the circumference of the pier body and penetrates through the pier body; two or more than two steel framework cage layers are arranged inside the pier body; the outermost steel framework cage layer is heteromorphic; a main reinforcement of the outermost steel framework cage layer is arranged at the inner side of a hooping reinforcement; the head end of the main reinforcement is provided with screw threads; the tail end of the main reinforcement is provided with a sleeve with an internal thread; the rest steel framework cage layers are circular, each main reinforcement thereof is arranged at the outer side of the corresponding hooping reinforcement, and the head end and the tail end of each main reinforcement are each provided with one sleeve with the internal thread; and the two adjacent steel framework cage layers are connected by a connecting part. The prefabricated concrete pier disclosed by the invention has the advantages of excellent mechanical properties, high concrete strength grade, simple and convenient production process, and so on.

Description

technical field [0001] The invention relates to the technical field of building bridges, and relates to an improvement in the shape and structure of a bridge pier, a molding die for the bridge pier and a manufacturing method for the bridge pier. Specifically, it is a prefabricated high-strength concrete bridge pier and its forming mold and manufacturing method. Background technique [0002] Most of the viaduct piers in highways and municipal roads are cast-in-place. Concrete piers poured on site are greatly affected by the site environment. For example, construction in rainy days cannot guarantee the quality and construction period of bridge piers in urban elevated areas, and will also cause certain damage to the surrounding environment. In addition, since the cast-in-place bridge piers are directly filled with concrete into the prefabricated steel bars at the construction site and formed after natural curing, there are many factors affecting the strength of the concrete. ...

AI Technical Summary

Problems solved by technology

Concrete piers poured on site are greatly affected by the site environment. For example, construction in rainy days cannot guarantee the quality and construction period of bridge piers in urban areas, and will also cause certain damage to the surrounding environment.

In addition, since the cast-in-place bridge piers are directly filled with concrete into the prefabricated steel bars at the construction site and formed after natural curing, there are many factors affecting the strength of the concrete

When the bridge pier is a hollow section, a double-mode structure is adopted, the mold installation is complicated, and the construction period is long. Moreover, the production of concrete bridge piers by this process has complex reinforcement cages, poor compression and impermeability of the pile concrete, and poor durability. Poor, prone to cracks and many other problems, the quality cannot be guaranteed, too much concrete, steel and other materials are consumed during pouring and production, and national resources are wasted

[0003] As a result, the bridge piers of some projects have changed from cast-in-place to factory prefabrication. However, in the manufacturing process of prefabricated bridge piers, there is generally a low degree of mechanization, especially in the manufacture of steel skeleton cages, which still rely more on manual binding. This not only affects work efficiency, but also leads to poor firmness of the reinforcement cage due to human factors, and the main reinforcement is easy to slide. During the forming process of the prefabricated pier, the main reinforcement is prone to misalignment, and even serious quality problems such as main reinforcement exposure.

[0004] At present, for commonly used molds such as round, square, etc., the structure and accessories of this mold are suitable for making prefabricated pile products such as pipe piles and hollow square piles, but not suitable for the production of special-shaped piers for bridges. Some mold structures are improved and different production accessories are redesigned

Images