Reactive powder concrete pipe column for ocean engineering

Abstract

The invention discloses a reactive powder concrete pipe column for ocean engineering. The reactive powder concrete pipe column comprises a reactive powder concrete casing pipe (1), a stirrup (2), a longitudinal bar (3) and a concrete column (4), wherein the stirrup (2) and the longitudinal bar (3) are arranged in the reactive powder concrete casing pipe (1). The reactive powder concrete pipe column is characterized in that the stirrup (2) is a closed fiber-reinforced plastic stirrup (2), the longitudinal bar (3) is a longitudinal fiber-reinforced plastic bar (3), and corrosion-resistant short fibers are mixed into the reactive powder concrete of the casing pipe (1); and the concrete column (4) is cast in the casing pipe (1) in situ and is made of concrete prepared by mixing seawater and sea sand. The reactive powder concrete pipe column has the characteristics of excellent ocean environment corrosion resistance, prefabrication construction, high axial bearing capacity, utilization of on-site materials such as seawater and sea sand, good economical efficiency and the like, is a novel structural column capable of meeting the construction requirements of ocean engineering and particularly ocean island engineering and can also replace a steel pipe pile in ocean engineering.

Description

technical field [0001] The invention mainly relates to the fields of marine engineering and building structures in civil engineering, and in particular refers to a prefabricated active powder concrete pipe column used in marine engineering. Background technique [0002] The ocean is rich in natural resources, especially energy and mineral resources. At the same time, the ocean also provides a space environment for human beings to survive. The ocean area under my country's jurisdiction is very broad, which contains rich marine natural resources. The development of marine resources is an emerging field of important strategic significance. Therefore, the 21st century is also called the "Ocean Century". In my country's vast territorial waters, there are many pelagic islands and reefs, which are far away from the mainland, with harsh natural environments, scarce resources, and extremely inconvenient transportation. However, it is of great significance to the development and cons...

AI Technical Summary

Problems solved by technology

However, the use of this active powder concrete casing column directly for marine engineering construction has the following technical defects in terms of corrosion resistance: First, at present, ordinary steel fibers or copper-coated steel fibers mixed in RPC cannot effectively resist marine corrosion. The corrosion of the environment, the corrosion of steel fibers not only affects the appearance of the components, but also makes the corrosive medium erode from the surface of the components to the inside of the components along the channels formed by the steel fibers, resulting in corrosion damage to RPC components; second, the chloride ions in the marine environment Strong permeability, once the chloride ion diffuses to the surface of the steel bar in the casing, the steel bar will rust, which will lead to the cracking and damage of the casing; thirdly, the reinforced concrete column cast in the RPC casing cannot use seawater and sea sand as raw materials , does not meet the requirements of local materials

Images