Pile cap of prefabricated square concrete pile

Abstract

A pile cap of a prefabricated square concrete pile comprises four skirt plates, a top plate and a plurality of connecting pieces. A square body is formed by the four skirt plates in an enclosed mode. The top plate is welded to the top end of the square body. Each connecting piece comprises a double-thread screw and a pin bush. Each pin bush comprises an open box and two semi-bush mechanisms. Each semi-bush mechanism comprises a semi-bush body and a pressure spring. The front face of each semi-bush body is concave inwards to form a concave part. A sleeving space is formed between the concave parts of every two semi-bush bodies. The back face of each open box is fixed to a screw hole of the top plate. One end of each double-thread screw is pressed in the corresponding sleeving space, and the other end of each double-thread screw is rotationally connected with the interior of a screw hole of a top plate of another pile cap. One end of each pressure spring is fixed to the inner wall of the corresponding open box, and the other end of each pressure spring is fixedly connected to the back face of the corresponding semi-bush body. According to the pile cap of the prefabricated square concrete pile, connection is easy, convenient, fast and firm, the bearing capacity is high, the quality is stable, operation is simple, and the construction quality and speed of pile connection can be increased effectively.

Description

technical field [0001] The invention relates to a concrete prefabricated square pile cap. Background technique [0002] There are two connection methods for traditional concrete prefabricated square piles, namely welding method and anchor connection method. When using the welding method to connect the piles, it is required to fix the four corners by spot welding, and then weld symmetrically at the same time to reduce welding deformation, and the welding is divided into two layers during construction, the first layer uses thin welding rods, and the second layer uses thick welding rods. After welding, the weld should be cooled under natural conditions for more than 5 minutes before sinking the pile. In the anchor connection method, all the exposed anchoring steel bars of the upper section pile are inserted into the reserved holes of the lower section pile to ensure that it is vertical and the contact surface is horizontal, then the upper section pile is lifted, the sponge cla...

AI Technical Summary

Problems solved by technology

[0004] (1) All welding connections rely on manual electric welding, which requires high professional skills for workers, and is greatly affected by workers' electric welding technology and human factors, so the welding quality is unstable;

[0005] (2) The electric welding connection takes a long time, which takes 30 minutes or more, and consumes a lot of man-hours;

[0006] (3) The construction progress is slow and the utilization efficiency of the pile driver is low;

[0007] (4) After the welded joint is hit by a heavy hammer, it is easy to produce cracks and reduce the tensile strength

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