Low-prestress high-ductility mixed reinforced concrete pile and manufacturing method thereof

Abstract

The invention relates to the field of building concrete piles, in particular to a low-prestress-degree and high-ductility mixed reinforced concrete pile and a manufacturing method thereof.The low-prestress-degree and high-ductility mixed reinforced concrete pile comprises a concrete pile body and a reinforcement cage assembly matched with the concrete pile body in section shape; the shear-resistant stirrups are fixed to the peripheries of the prestressed steel bars in a surrounding mode and are arranged in a full-length mode. The prestressed steel bars comprise prestressed steel bars and strength steel bars which are arranged at intervals, the tension control stress sigma con of the prestressed steel bars is 0.5-0.6 time of the tensile strength standard value fptk, and the tension control stress sigma con of the strength steel bars is 0.5-0.6 time of the yield strength standard value fyk of the strength steel bars; the problems that a traditional PHC concrete pipe pile is low in bearing capacity and poor in ductility are solved, meanwhile, compared with a PRC mixed reinforcement pipe pile, the deformation capacity after high-strength hot-binding ribbed steel bars are yielded can be fully utilized, and therefore the ductility and safety storage of components are improved, and the high-strength hot-binding ribbed steel bars can be more widely applied to seismic fortification intensity areas.

Description

technical field [0001] The invention relates to the field of building concrete piles, in particular to a low prestressed high ductility mixed reinforced concrete pile and a manufacturing method thereof. Background technique [0002] Prestressed concrete pipe piles, referred to as PHC pipe piles, are widely used in construction pile foundations, slope support and other projects because of their high vertical bearing capacity, good corrosion resistance, and low cost. However, prestressed concrete pipe piles have small flexural bearing capacity and poor ductility, so there are certain limitations in the use of prestressed concrete pipe piles in seismic fortified areas and slope support projects. Prestressed concrete pipe pile with mixed reinforcement, referred to as PRC pipe pile, is a new type of prestressed concrete pipe pile formed by configuring a certain number of non-prestressed steel bars in PHC pipe piles. As a product with relatively good ductility, PRC pipe piles are...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects described in the background technology, thereby realizing a low prestressed high ductility mixed reinforced concrete pile and its manufacturing method, which solves the problems of low bearing capacity and poor ductility of traditional PHC concrete pipe piles , at the same time, compared with the PRC hybrid reinforced pipe pile, it can make full use of the deformation capacity of the high-strength hot-wired ribbed steel bar after yielding, thereby improving the ductility of the component and its safety reserve, so that it can be used more widely in the seismic fortification intensity area

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