Concrete variable-section pipe pile

Abstract

The invention relates to a concrete variable-section pipe pile, which is characterized in that the concrete variable-section pipe pile comprises at least two concrete pipes with different diameters and annular transitional steel plates, the diameter of the first concrete pipe is the smallest, the diameter of the middle concrete pipes is gradually increased and the diameter of the last concrete pipe is the largest; connecting pieces are arranged on the concrete pipes; and every two adjacent concrete pipes with different diameters are fixedly and integrally connected through the connecting pieces and the annular transitional steel plates. The concrete variable-section pipe pile has the advantages that the structure is simple, the pipe pile is convenient to connect and easy to manufacture, and the cost is low; since the diameter of the pipe pile is gradually increased, the harmony between the structural strength change and the axial force change of a pile body is good, not only can the construction difficulty in driving a pile tip into a bearing stratum be reduced, but also the bearing capacity of the bearing stratum can be fully utilized, the proportion of pile tip resistance in bearing force is improved and the influence of pile sinking on surrounding environments is reduced; and the length of the pile can be reduced by effectively using the bearing capacity of a shallow soil layer and the cost of pile foundation engineering is reduced.

Description

technical field [0001] The invention relates to a pipe pile foundation in the civil engineering industry, in particular to a concrete variable-section pipe pile. Background technique [0002] In civil engineering construction in our country, equal-diameter prestressed concrete pipe piles are more and more widely used in foundation engineering. This kind of equal-diameter pipe piles has a simple structure and is easy to manufacture. But this kind of traditional equal-diameter prestressed concrete pipe pile has shallow soil bearing capacity and cannot be used; it is difficult to construct the pile end of the larger diameter pipe pile into the bearing layer to a specified depth, and the bearing capacity of the bearing layer cannot be used. Fully exerted, the structural strength of the pile body is not in harmony with the change law of the axial force of the pile body. In the layered foundation with better strength above the bearing layer, this kind of constant-section prestres...

AI Technical Summary

Problems solved by technology

But this kind of traditional equal-diameter prestressed concrete pipe pile has shallow soil bearing capacity and cannot be used; it is difficult to construct the pile end of the larger diameter pipe pile into the bearing layer to a specified depth, and the bearing capacity of the bearing layer cannot be used. Fully exerted, the structural strength of the pile body is not coordinated with the variation law of the axial force of the pile

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