An enlarged head prestressed pipe pile and its construction method

Abstract

The present invention provides a prestressed pipe pile with an enlarged head and its construction method. The pipe pile includes: a pipe pile body and an enlarged head, wherein one end of the pipe pile body is connected to the enlarged head, and the pipe pile body is connected to the enlarged head. The expansion head is provided with a steel bar expansion device; the construction method includes: 1. drilling; 2. reaming; 3. placing a pipe pile with a steel bar expansion device into the hole; 4. expanding the steel bar expansion device; The conveying pipe goes deep into the bottom of the hole from the inner hole of the pipe pile; 6. Filling the filler between the hole wall and the pipe pile, these six steps. The invention provides an enlarged head prestressed pipe pile and its construction method, which can prevent the pile body from cracking, so that the new pipe pile can produce greater pullout resistance and higher bearing capacity than conventional pipe piles, and can be used for On the bedrock with high bearing capacity, it can also be applied to the soil layer with low bearing capacity, and at the same time, the end bearing capacity of the pipe pile can be fully utilized, so that the strength of the pipe pile itself can be fully exerted.

Description

technical field [0001] The invention relates to the construction field of engineering piles, in particular to an enlarged head prestressed pipe pile and a construction method thereof. Background technique [0002] At present, my country's high-strength prestressed concrete pipe piles generally rely on the frictional resistance of the soil layer on the side of the pile to provide supporting force. It is difficult to realize the effect of the pipe pile on the bedrock with high bearing capacity by directly using the pile pressure or piling technology. The end of the pipe pile is often installed on the On the soil layer with low bearing capacity, the end bearing capacity of the pipe pile cannot be fully utilized, so that the strength of the pipe pile itself cannot be fully utilized. In addition, in the anti-floating design of underground structures, concrete pouring piles are often used to provide pullout resistance. The cracking of the pile body is an important feature of the u...

AI Technical Summary

Problems solved by technology

The cracking of the pile body is an important feature of the uplift pile different from the compression pile. The crack will cause great harm to the pile body and directly accelerate the corrosion of the steel bar of the pile body, especially when there is corrosive groundwater. The load-carrying performance causes greater hidden danger

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