Prestressed pipe pile and its construction method

Abstract

The invention relates to the technical field of drilling equipment, and discloses a construction method for a prestressed pipe pile, wherein the method is used for pile forming in a reclamation area. The method comprises the following steps that firstly, a main drill hole is formed through a down hole hammer, and a total pile casing is utilized for following drilling of the down hole hammer until the down hole hammer and the total pile casing pass through a rock filling layer; secondly, the down hole hammer is lifted and pulled, the total pile casing is filled with sandy soil until the filled sandy soil reaches the upper surface of the reclamation area, the total pile casing is lifted and pulled, and a sand filling hole is formed through the main drilling hole; thirdly, external force is exerted on the upper end of the prestressed pipe pile, the prestressed pipe pile passes through the sand filling hole, and the lower end of the prestressed pipe pile is embedded in a bed rock below the rock filling layer. According to the construction method for the prestressed pipe pile, the position where a pile needs to be formed in the reclamation area is drilled through the cooperation of the down hole hammer and the total pipe casing pipe following, the main drilling hole passes through the rock filling layer, the rock filling layer is converted into the sandy soil, a hammer pile machine and the like are utilized for continuing to drive the pipe pile, the pipe pile easily passes through the rock filling layer, and the construction method has the advantages that the hole forming speed and construction efficiency are high, construction cost is low, the construction period is short, and the construction field is clean.

Description

technical field [0001] The invention relates to the technical field of drilling equipment, in particular to a prestressed pipe pile and a construction method thereof. Background technique [0002] With the needs of the construction and development of coastal cities, large-scale reclamation projects will be carried out, and a large number of ultra-high and ultra-deep buildings will also be erected in the reclamation areas. In these reclamation areas, large-diameter and ultra-deep prestressed Pipe piles (more than 800mm in diameter and more than 50m deep) are used more and more widely. The prestressed pipe pile has the advantages of good pile quality, high single pile bearing capacity, fast construction speed, short construction period and low cost, and does not require mud wall protection in the process of hole forming, avoiding the generation of a large amount of mud waste and realizing green construction. [0003] In the prior art, the construction methods of prestressed p...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a construction method for prestressed pipe piles, which aims to solve the problems of prestressed pipe piles being difficult to pass through the rock filling layer in the prestressed construction methods in the prior art, resulting in failure of pile formation and low construction efficiency

Images