FRP pipe and thick-wall steel pipe compounding hollow recycled concrete pile

Abstract

The invention discloses an FRP pipe and thick-wall steel pipe compounding hollow recycled concrete pile which is mainly formed by an FRP pipe, a round reinforcement cage framework, a thick-wall steel pipe and recycled concrete. The round reinforcement cage framework and the thick-wall steel pipe are arranged in the FRP pipe, and the round reinforcement cage framework, the thick-wall steel pipe and the FRP pipe are arranged concentrically. The recycled concrete is poured in annular space between the FRP pipe and the thick-wall steel pipe. The bearing capacity and deformation resisting capacity of the single pile can be greatly improved through the built-in thick-wall steel pipe. The wrapping FRP pipe can effectively prevent a pile body from being corroded, and the durability of the pile body is improved. Meanwhile, the FRP pipe and spiral stirrups are combined to restrain the inner recycled concrete, and the bearing force of the compounding pile is further improved. Waste concrete is fully utilized as recycled aggregate, and application and popularization of the recycled concrete in building foundation engineering are facilitated. In a word, the compounding hollow recycled concrete pile has the advantages of being good in pile forming quality, high in bearing force, good in deformation resisting capacity and durability, small in influence on the environment, high in construction speed and the like.

Description

technical field [0001] The invention belongs to the field of pile foundation engineering in building foundation engineering, in particular to a composite hollow regenerated concrete pile of FRP pipe and thick-walled steel pipe. Background technique [0002] For reinforced concrete piles serving in oceans, ports, saline-alkali areas, groundwater or inland areas with high concentrations of corrosive media in the soil, the pile body will be corroded by corrosive substances for a long time, such as chloride ion penetration, sulfate corrosion , freeze-thaw cycles, etc., the durability of pile foundations is very prominent. In addition, the pile body is buried deep in the ground, making it difficult to carry out visual inspection. Under the action of corrosive medium, the pile body will corrode the steel bar, the composition of the concrete will change, the volume will expand, and finally crack and peel off, and the pile body will lose its bearing capacity. Therefore, the corros...

AI Technical Summary

Problems solved by technology

However, according to the current construction technology of prefabricated concrete piles, the production process requires various processes such as formwork support and formwork removal, which consumes a lot of steel formwork or wood formwork, increasing the workload and construction cost

Images