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A combined phc pipe pile that reduces negative frictional resistance

A PHC pipe pile, negative friction technology, applied in sheet pile wall, construction, infrastructure engineering and other directions, can solve the problems of increasing the pile pressure, reducing the vertical bearing capacity of the pile foundation, etc. The effect of improving side friction resistance and eliminating negative friction resistance

Inactive Publication Date: 2016-05-11
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the PHC pipe pile is in a state of compression under prestress, when the pile body is subjected to negative friction, the pressure on the pile body will further increase, which will greatly reduce the vertical bearing capacity of the pile foundation

Method used

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  • A combined phc pipe pile that reduces negative frictional resistance
  • A combined phc pipe pile that reduces negative frictional resistance
  • A combined phc pipe pile that reduces negative frictional resistance

Examples

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0031] The invention relates to a PHC pipe pile with reduced negative frictional resistance, comprising a PHC pipe pile 1, a flange 2, a telescopic part 3, a hook 4, a small pulley 5, a steel strand 8, an isolation plate 7, a bolt 6, Pile inner bracket 9 , displacement transmission device 10 , displacement gauge 11 and grouting pipe 12 .

[0032] Such as figure 1 , 2 , 3, the telescopic part top plate 301 and the telescopic part bottom plate 302 are respectively connected to the flanges of the upper and lower sections of the PHC pipe pile by bolts 6, and the inner diameter of the telescopic part top plate 301 is smaller than the inner diameter of the PHC pipe pile 1; the hook 4 is welded on T...

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Abstract

The invention discloses a combined PHC pipe pile capable of reducing a negative friction effect. The combined PHC pipe pile comprises an upper PHC pipe pile section and a lower PHC pipe pile section, wherein a telescopic part is arranged between the two PHC pipe pile sections; the telescopic part comprises a telescopic part top plate, a telescopic part bottom plate and a hydraulic jack positioned between the telescopic part top plate and the telescopic part bottom plate; a hook is welded at the lower bottom surface of the telescopic part top plate; small pulleys are welded at the top surface of the telescopic part bottom plate; the telescopic part is internally provided with a steel strand; one end of the steel strand is tied to the hook at the lower bottom surface of the telescopic top plate, and the other end of the steel strand downwards bypasses two small pulleys on the telescopic part bottom plate, then upwards passes through a small hole of the telescopic part top plate and then is connected with an intra-pile bracket on the top of the PHC pipe pile through the interior of the PHC pipe pile; the top of the PHC pipe pile is provided with a displacement transfer device. According to the combined PHC pipe pile, the hydraulic jack is utilized for actively settling the upper PHC pipe pile section, so that the negative friction resistance of a pile body can be effectively reduced or even eliminated.

Description

technical field [0001] The invention relates to a pipe pile capable of enhancing the side friction resistance of engineering piles, in particular to a combined PHC pipe pile capable of reducing negative friction resistance. Background technique [0002] At present, in the pile foundation engineering involving negative friction resistance at home and abroad, most of the methods of pile body coating and surrounding isolation piles are used to reduce the influence of negative friction resistance on engineering piles. However, the method of pile body coating will have adverse effects on the surrounding water quality, so it should be used with caution in engineering; the method of isolating piles cannot completely eliminate the influence of negative friction resistance, and increases the amount of construction work and prolongs the construction period. PHC pipe pile is a prestressed high-strength concrete pipe pile. It adopts the pre-tensioned prestressed centrifugal forming proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/52E02D5/30
Inventor 黄挺吴彬贺瑞郑金海
Owner HOHAI UNIV
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