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Foundation structure for uplift pile

A technology for foundation structures and uplift piles, applied in foundation structure engineering, sheet pile walls, buildings, etc., can solve the problem of insufficient pullout resistance of single pile foundation structures, achieve easy and labor-saving subsidence construction, and increase pullout resistance force effect

Active Publication Date: 2014-06-25
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] What the present invention aims to solve is the technical problem that the pullout resistance of the current single pile foundation structure is not high enough, and provides a kind of pullout pile foundation structure

Method used

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  • Foundation structure for uplift pile
  • Foundation structure for uplift pile
  • Foundation structure for uplift pile

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as Figure 1 to Figure 3 As shown, this embodiment discloses an uplift pile foundation structure, which includes a single pile foundation structure 1 and four arc-shaped flange structures 2 fixed to the bottom of the single pile foundation structure 1 in a radial and even distribution. The four arcuate flange structures 2 are rotated and arranged in the same clockwise direction, that is, they are arranged clockwise or counterclockwise in the radial direction of the single pile foundation structure 1 .

[0020] The monopile foundation structure 1 is a hollow steel cylinder structure with an external diameter of 1.6m, a height of 30m, and a wall thickness of 30mm.

[0021] The curved flange structure 2 is a thin-walled steel plate pentahedron with a curved surface, the overall structure length is 15cm, and the wall thickness is 10mm; the curved flange structure 2 can effectively increase the pullout capacity of the pile foundation. Specific as figure 1 As shown, th...

Embodiment 2

[0023] Such as Figure 4 to Figure 6 As shown, different from Embodiment 1, the arc flange structure 2 of this embodiment is a thin-walled steel plate tetrahedron with an arc surface, the overall structure length is 15 cm, and the wall thickness is 10 mm. Specific as Figure 4 As shown, the shape of the arc flange structure is a cone placed horizontally, the longitudinal section of the cone is a fan-shaped surface of different sizes, the length of the two straight sides of the fan-shaped surface is 10cm, and the arc curvature is 0.5. Therefore, the inner end surface of the arc flange structure 2 is welded to the monopile foundation structure 1, and the outer end surface 24 is a fan-shaped end surface or a cone apex. The upper surface 21 of the arc flange structure 2 is a horizontal plane, the first side 22 is a plane, and the second side 23 is an arc whose normal direction is inclined downward. Wherein, the first side 22 is preferably vertical to the vertical plane of the up...

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Abstract

The invention discloses a foundation structure for an uplift pile. The bottom of a single-pile foundation structure is fixedly connected with arc-surface flange structures which are uniformly distributed in a radial direction and arranged in a manner of rotating in the same clockwise direction; each arc-surface flange structure takes the shape of a transversely arranged column or cone with a fan-shaped cross section; the outer end of the arc-surface flange structure is a fan-shaped end surface or a top point; the upper surface of the arc-shaped flange structure is a horizontal surface; the first side surface of the arc-shaped flange structure is a flat surface, and the second side surface of the arc-shaped flange structure is an arc surface; and the normal of the second side surface is downward inclined. According to the invention, in the sinking construction of the foundation structure for the uplift pipe, the arc-surface flange structures can drive the single-pile foundation structure to rotate under the action of the pressure of a soil layer to avoid the damage area of the soil, so that the sinking construction is easier and more labor-saving; and after the sinking construction of the foundation structure for the uplift pile is completed, when the pile is upward pulled, the upper surfaces of the arc-surface flange structures and the soil can be combined into a whole to act together so as to greatly increase the uplift resistance of the foundation structure for the uplift pile.

Description

technical field [0001] The invention relates to a special pile for foundation engineering, in particular to an uplift-resistant pile foundation structure. Background technique [0002] The monopile foundation structure is a common offshore structure foundation, which is mainly used to resist the vertical force and horizontal force transmitted by the offshore structure. With the development of large-scale offshore structures, the requirements for the bearing capacity of the pile foundation are getting higher and higher, and the pile foundation generally achieves the purpose of increasing the bearing capacity by increasing the diameter. However, when the pile foundation exceeds a certain diameter, the requirements for piling equipment will be very high, often resulting in failure of construction or high cost. Contents of the invention [0003] The invention aims to solve the technical problem that the pullout resistance of the current single pile foundation structure is not...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D27/12E02D5/48
Inventor 丁红岩张浦阳
Owner TIANJIN UNIV