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Partially prestressed concrete electric pole and preparation method thereof

A concrete and prestressed technology, applied in the direction of manufacturing tools, structural elements, building components, etc., can solve the problems of no bearing capacity prestressed concrete poles, products can not meet the design load requirements, etc., to improve the tensile strength and resistance. The effect of cracking and prolonging the service life

Inactive Publication Date: 2010-06-02
SICHUAN CHINA STRUCTURE RESIDENTIAL IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Some existing prestressed concrete poles are small standard bends, and their preparation method is basically the same as that of prestressed concrete poles, that is, the weight of reinforcement is 20%-30% higher than that of prestressed concrete poles, but none of the products can reach Design Load Requirements
Therefore, there is no partially prestressed concrete pole with a large bearing capacity at present.

Method used

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  • Partially prestressed concrete electric pole and preparation method thereof
  • Partially prestressed concrete electric pole and preparation method thereof
  • Partially prestressed concrete electric pole and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0033] 8 pieces of heterosexual steel bars with a diameter of 9.0mm are used as prestressed steel bars for electric poles, and 8 pieces of grade II threaded steel bars with a diameter of 18mm are used as non-prestressed steel bars for electric poles. process; such as figure 1 As shown, the prestressed steel bars and non-prestressed steel bars are evenly spaced and crossed along the circumferential direction, and the spiral bars and erecting rings can be made of commonly used materials for electric poles. The distance between the spiral ribs is 1500mm at both ends, the inner distance is 50mm, and the rest of the section is 100mm; set up a 500mm long HPB235 steel bar for the vertical ring. Strictly control the welding quality of the pole frame (according to the requirements of chapters 4 and 5 in the industry standard JGJ18-2003 "Reinforcement Welding and Acceptance Regulations"), clean up the pole mold, and place the welded pole frame.

[0034] The sand is screened and cleaned...

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Abstract

The invention belongs to the technical field of concrete electric poles, in particular to a partially prestressed concrete electric pole and a preparation method thereof. The partially prestressed concrete electric pole is formed by casting concrete on an electric pole frame which comprises a spiral reinforcement, reinforcing steel bars and an erect ring, wherein reinforcing steel bars comprise prestressed reinforcing steel bars and non-prestressed reinforcing steel bars which are alternately distributed on the circumference. The invention adopts two kinds of reinforcing steel bars to be circularly, uniformly and alternately crossed and matched, improves the tensile strength and the crack resistance of the partially prestressed concrete electric pole, prolongs the service life of the electric pole, has low manufacture cost and is particularly suitable for line modification of counties and cities.

Description

technical field [0001] The invention belongs to the technical field of concrete electric poles, in particular to a partially prestressed concrete electric pole and a preparation method thereof. Background technique [0002] In recent years, with the implementation of the transformation of urban and rural power grids in my country, the power grid has been developing day by day, and the erection of lines has developed towards large wire diameters and multi-circuits. The requirements for the tower network structure and load are also greater. Rods and ring-shaped prestressed poles are almost unable to meet the requirements of the bearing capacity of some lines. my country's conical concrete poles generally have a taper of 1 / 75, and the concrete grade is C50. Without changing the taper of the pole, increasing the amount of steel bars or increasing the concrete strength grade will be restricted by the concrete grade. The bending strength of steel bars cannot be improved. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04H12/12E04H12/16E04C5/01E04C5/03E04G21/12B28B1/20B28B11/24
Inventor 涂学爱车大桥张斌
Owner SICHUAN CHINA STRUCTURE RESIDENTIAL IND
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