Mechanical connecting device of concrete precast pile and manufacturing method

Abstract

The invention relates to a mechanical connecting device of a concrete precast pile and a manufacturing method. The mechanical connecting device comprises an axial pile body connecting unit, wherein the axial pile body connecting unit comprises a plurality of groups of first sleeve nuts and second sleeve nuts, and the first sleeve nuts and the second sleeve nuts are matched with each other; each group of first sleeve nuts and second sleeve nuts are correspondingly connected with the axial end surfaces of two pile bodies; the first sleeve nuts and the second sleeve nuts are connected with each other through connecting inserting rods; counter bores are correspondingly formed in one of the sides, which are inserted into the pile bodies, of the first sleeve nuts and the second sleeve nuts; andthe positions of the counter bores are matched with that of an upset head of prestressed steel bars. According to the mechanical connecting device, an auxiliary hoop grouting connecting mode is adopted, and bending-resistant, tensile and shearing-resistant stress loads at a pile end joint are uniformly distributed to a radial pile body connecting unit, so that the phenomenon that the pile joint cracks due to insufficient shearing-resistant, bending-resistant and shearing-resistant load capacity of the pile head mechanical connecting device is avoided, and the connecting quality and effect at the joint of the concrete precast pile are greatly improved.

Description

technical field [0001] The invention relates to a mechanical connection device and a manufacturing method of a concrete prefabricated pile. Background technique [0002] At present, when prestressed concrete prefabricated piles are demoulded and stretched after the concrete prefabricated piles are cured, the prestressed steel bars will relax. However, if there is no end plate at the pile head, the prestressed steel bars at the pile head only rely on the steel bar heading to drive the steel bar sleeve to relax and retract. Therefore, the precompression stress of the pile head concrete around the sleeve will be lost a lot due to the relaxation and retraction of the steel bar, and the precompression stress of the pile head concrete is very small, which seriously affects the durability of the pile head. In addition, if the prefabricated pile ends are connected purely mechanically with no end plate and only the main reinforcement position, the mechanical connection joints will ha...

AI Technical Summary

Problems solved by technology

The mechanical connection device of this scheme is suitable for pile head docking of various concrete prefabricated piles in pile foundation engineering, especially suitable for pile joints under the action of horizontal thrust, shear force and large bending distance under complex geological conditions such as soft soil and quicksand liquefaction. In this case, the problems existing in the prior art are solved

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