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Prefabricated concrete pipe pile for overhead power transmission line

A technology of overhead transmission lines and prefabricated pipe piles, which is applied in construction and infrastructure engineering, etc., can solve the problems of small contact area and unfavorable piling, and achieve the effects of improving interface structure, reducing cost, enhancing strength and corrosion resistance

Active Publication Date: 2017-08-25
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this invention patent uses annular convex ribs to increase the surface area of ​​the pile in contact with the soil. On the one hand, the contact area is small, and on the other hand, it is not conducive to piling

Method used

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  • Prefabricated concrete pipe pile for overhead power transmission line
  • Prefabricated concrete pipe pile for overhead power transmission line
  • Prefabricated concrete pipe pile for overhead power transmission line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A concrete prefabricated pipe pile for overhead transmission lines, such as Figure 1-2 As shown, it includes a hollow pipe pile 1 and a pile head 2, wherein the hollow pipe pile 1 is a hollow structure with a circular cross section, and the pipe pile is filled with reinforced concrete. The hollow structure can reduce weight and cost; the pile head 2 is a conical type structure, it is easier to screw into the ground below.

[0031] The hollow pipe pile 1 includes an upper pipe pile 3 and a lower pipe pile 4, wherein the inner diameter of the upper pipe pile 3 and the lower pipe pile 4 are the same, and the outer diameter of the upper pipe pile 3 is larger than the outer diameter of the lower pipe pile 4. This structure is adopted It can reduce foundation settlement, increase the rigidity of pipe piles, save subsequent concrete usage, and reduce the cost of prefabricated pipe piles.

[0032] The lower pipe pile 4 is provided with a helix 5 outside, and the helix can be ...

Embodiment 2

[0038] The structure of embodiment 2 is basically the same as that of embodiment 1, the difference is: as image 3 As shown, the spiral 5 extends to the pile head 2, making it easier to insert the pile, and the length ratio of the upper pipe pile 3 and the lower pipe pile 4 in this embodiment is 1:5.

[0039] The concrete is made of the following raw materials in parts by weight: 265 parts of Portland cement, 52 parts of coal ash powder, 24 parts of silica fume, 740 parts of sand, 920 parts of stone, 145 parts of water, and 8 parts of polycarboxylate superplasticizer , 11 parts of steel fiber, 14 parts of glass fiber, 22 parts of polyvinyl acetate emulsion, 3 parts of isobutyl triethoxysilane, 2 parts of 3-aminopropyl triethoxysilane, 0.3 parts of rosin soap and methyl fiber 8 parts of plain sodium.

[0040] Among them, the particle size of the stone is 10-15mm, and the mud content is ≤2%.

Embodiment 3

[0042] Embodiment 3 The structure of the prefabricated pipe pile is the same as that of Embodiment 1, except that the concrete is made of the following raw materials in parts by weight: 270 parts of Portland cement, 54 parts of coal ash powder, 22 parts of silica fume, and 750 parts of sand 940 parts of stone, 150 parts of water, 7 parts of polycarboxylate superplasticizer, 12 parts of steel fiber, 13 parts of glass fiber, 24 parts of polyvinyl acetate emulsion, 3 parts of isobutyltriethoxysilane, 3-amino 3 parts of propyl triethoxysilane, 0.4 parts of rosin soap and 6 parts of sodium methylcellulose.

[0043] Among them, the particle size of the stone is 10-15mm, and the mud content is ≤2%.

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Abstract

The invention discloses a prefabricated concrete pipe pile for an overhead power transmission line. The prefabricated concrete pipe pile comprises a hollow pipe pile and a pile head; the hollow pipe pile comprises an upper pipe pile and a lower pipe pile, the outer diameter of the upper pipe pile is larger than that of the lower pipe pile, and a screw is arranged on the exterior of the lower pipe pile; a pile expanding device is arranged on the lower pipe pile and comprises two arc-shaped grooves which are formed in the symmetrical positions of the same circumference of the lower pipe pile, an annular steel plate matched with the corresponding arc-shaped groove is hinged to the bottom of each arc-shaped groove, the tail end of each annular steel plate stretches out of the corresponding arc-shaped groove, and the direction that the annular steel plates are arranged in the arc-shaped grooves is consistent with the screwing-in direction of the screw. According to the prefabricated concrete pipe pile for the overhead power transmission line, foundation settlement can be reduced, the rigidity of the pipe pile can be improved, the using amount of concrete can be decreased, and the construction cost of the prefabricated pipe pile can be reduced; in addition, the strength of the concrete is high, the contact area of the prefabricated pipe pile and soil mass is large, and therefore the bearing capacity of the prefabricated pipe pile can be enhanced.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a concrete prefabricated pipe pile for an overhead power transmission line. Background technique [0002] Concrete prefabricated pipe piles are used in overhead transmission lines. When the foundation force is large, it is necessary to increase the length of the pipe pile or increase the diameter of the pipe pile to meet the foundation force of the transmission line tower. Increase the length of the pipe pile or increase the diameter of the pipe pile It will increase the project investment. In addition, when increasing the length of the pipe pile or increasing the diameter of the pipe pile, it is also necessary to consider increasing the bearing capacity of the pipe pile. [0003] Chinese Patent Publication No. CN204491617U discloses a post-grouting device for static pressure or hammering concrete prefabricated pipe pile bottoms. The prefabricated pile tip is instal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D27/42
CPCE02D27/42Y02W30/91
Inventor 胡鑫罗明刘湘莅席小娟杨君王琦梦刘冰刘文龙齐道坤李勇景川郭翔龙刘浩田
Owner STATE GRID CORP OF CHINA
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