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Steel pipe pile and steel pipe pile implementation method

A technology of steel pipe piles and steel pipes, applied in sheet pile walls, foundation structure engineering, construction, etc., can solve problems such as difficulty in ensuring straight-line advancement of steel pipe piles, improve penetration performance, improve construction efficiency, and ensure straight-line advancement sexual effect

Active Publication Date: 2013-10-02
NIPPON STEEL & SUMIKIN METAL PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that steel pipe piles rotate around the blades due to resistance from the ground (causing eccentricity), and it is difficult to ensure straight-line advancement of steel pipe piles especially at the initial stage of penetration.

Method used

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  • Steel pipe pile and steel pipe pile implementation method
  • Steel pipe pile and steel pipe pile implementation method
  • Steel pipe pile and steel pipe pile implementation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] One embodiment of the present invention will be described below with reference to the drawings.

[0023] exist figure 1 Among them, the steel pipe pile 1 has: a steel pipe main body 2, which is formed in an elongated cylindrical shape along the axial direction X and has an open front end; on the outer peripheral surface 2A. The pile head which is the upper end of the axial direction X is held by a suitable rotary press-in device, and pushed downward while rotating it, so that the driving force is obtained by the blade 3, and the steel pipe pile 1 is penetrated into the foundation . Formed on the front end portion of the steel pipe body 2 is an inclined opening 4 passing through one side in the radial direction toward the front end edge 2B ( figure 1 The left side in the middle) is formed by cutting off the steel pipe main body 2 obliquely upward; the front back part 5 is located on the other side in the radial direction of the front end edge 2B relative to the inclin...

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Abstract

Forming a tip back surface (5) on the rearward side of the leading edge (3A) of the blade in the excavation direction prevents misalignment of the steel pipe pile (1) and causes the pile to penetrate the ground while ensuring the straight advancement thereof when the steel pipe pile (1) is rotated and pressed into the ground because the tip back surface (5) opposes the torque centered on the leading edge (3A) of the blade. Because a slanted opening (4) is formed on the forward side of the leading edge (3A) of the blade in the excavation direction, earth excavated by rotating and pressing the pile into the ground can be smoothly taken into the interior of the main body (2) of the steel pipe from the slanted opening (4) and resistance of the ground to excavation is limited while increased resistance to penetration due to blockage inside the pipe can be reduced by pushing the earth taken into the main body (2) of the steel pipe upward.

Description

technical field [0001] The present invention relates to a steel pipe pile and a construction method of the steel pipe pile. Specifically, the present invention relates to the following steel pipe pile: the steel pipe pile has: a cylindrical and slender steel pipe main body; a helical blade, It is fixedly arranged on the outer peripheral surface of the main body of the steel pipe pile, and is at least the outer peripheral surface having a predetermined height range from the front end. In addition, the present invention also relates to a method for penetrating the above steel pipe pile by rotating and pressing. Construction method of steel pipe piles in foundation. Background technique [0002] In the prior art, a steel pipe pile has been proposed that has a spiral protrusion on the outer peripheral surface of the steel pipe, and the steel pipe pile is penetrated into the foundation by rotary pressing. (For example, refer to Patent Document 1). [0003] In the above-mentione...

Claims

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Application Information

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IPC IPC(8): E02D5/56E02D5/28E02D7/22
CPCE02D5/56E02D7/22
Inventor 泽石正道和田昌敏
Owner NIPPON STEEL & SUMIKIN METAL PROD CO LTD
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