Manufacturing method of concrete head-forging pipe pile with tapered pile tip

Abstract

The invention provides a manufacturing method of a concrete head-forging pipe pile with a tapered pile tip, comprising the following steps of: firstly prefabricating the tapered pile tip, then casting the tapered pile tip and a pile body into a whole, and then positioning and stretching through a stretching hole prefabricated on the tapered pile tip, and a concave hole and a butterfly-shaped hole on a purpose-made preposed stretching fixed plate in the process of casting so that the qualified concrete head-forging pipe pile with the tapered pile tip is manufactured. The manufacturing method has the advantages that the manufacturing method effectively solves the problem of integral connection of the tapered pile tip and the pipe pile and ensures the realization of a stretching technology in the production process of the pipe line. The manufactured pipe pile with the integral structure has the advantages of strong penetrating power and good integrity, can not generate the phenomenon that the tip is deviated and separated in the process of construction or pile formation, and ensures the sealing of pile ends and has the function of erosion resistance.

Description

【Technical field】 [0001] The invention relates to a concrete pipe pile, in particular to a method for manufacturing a concrete headed pipe pile with a tapered pile tip. 【Background technique】 [0002] The conical pile tips of traditional headed pipe piles are generally welded with steel plates. This kind of conical pile tips is not only expensive, but also has weak penetration and inconvenient construction. [0003] At present, punching bored piles are commonly used, which adopt conical body and conical pile tip, which has strong penetrating power and convenient construction, but it is a split structure, and the integral tubular pile technology with conical pile tip has not yet been developed. reported. The so-called split type means that the pile body and the conical pile tip are two separate units. To make the pile body and the conical pile tip integral during construction, on-site welding is required, but the position may be detached during loading, and the integrity is ...

AI Technical Summary

Problems solved by technology

The tensioning direction is along the axial direction. Since the conical pile tip is a cone structure, the above two methods a and b have technically insurmountable difficulties. If the method a is used, the conical pile cannot be realized. The tension of the connecting part of the tip and the pile body; if the method b is used, the centrifugal forming method is required to produce qualified pipe piles when concrete is used to manufacture pipe piles, but it is necessary to use concrete to manufacture tapered pile tips. Vibration forming method, if the conical pile tip is still manufactured by the centrifugal forming method, there will be a cavity in the conical pile tip and it will not be easy to form a pointed part, resulting in the obtained conical pile tip not meeting the requirements; therefore, a Neither of these two methods, b, can be realized. If the method c is used for tensioning, it cannot be realized according to the existing conventional technology.

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