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Production technology of high-strength post-tensioned reinforced concrete poles and poles

A technology of reinforced concrete and production technology, applied in the field of electric poles, can solve the problems of shortage of land resources, lack of reach, land occupation, etc., and achieve the best safety and reliability, high post-tensioning tension, and reduced tip diameter Effect

Active Publication Date: 2016-04-27
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And this value is equivalent to GB / 4623-2006 GB / 4623-2006 GB / 4623-2006 GB / 4623-2006 GB / 4623-2006 GB / 4623-2006 GB / 4623-2006 national standard, 18-meter electric pole tip diameter 350mm standard inspection Q-level value is 152.5kn.m, I-level value is 176.75kn.m, far from the national standard The strongest grade Q grade 228.75kn.m still has a difference of three grades, and it has not reached the bending moment value of the strongest grade that exceeds the national standard.
The 24m, 27m, and 30m concrete poles used in power transmission lines above 110kV must have square guy wires. The biggest disadvantage of poles with square guy wires is the land occupation. Land resources are in short supply. Currently, power transmission lines are generally replaced by relatively occupied land. Fewer iron towers and steel poles

Method used

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  • Production technology of high-strength post-tensioned reinforced concrete poles and poles
  • Production technology of high-strength post-tensioned reinforced concrete poles and poles
  • Production technology of high-strength post-tensioned reinforced concrete poles and poles

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Embodiment 1

[0042] Embodiment 1: as Figure 1-Figure 5 As shown, the process of this embodiment is mainly used to produce the whole single rod, and the specific steps are as follows,

[0043] 1.1. Arrange a group of non-prestressed tendons distributed around its axis according to the size of the proposed pole (tip diameter ∮190mm, length 12m) and taper (1:75), and each non-prestressed tendon is relative to the axis of the proposed pole The taper is 1:75; then weld a circle of inner hoops 6 (made by bending steel bars with a diameter of 6mm) at intervals of 500mm along the axial direction of the cage on the inside of the cage surrounded by non-prestressed tendons, and The inner steel hoops 6 are coaxially arranged, and the inner steel hoops are welded within a range of one meter from both ends; a prestressed anchor steel plate 1 is installed coaxially at each end of the cage. In this example, the prestressed anchoring steel plate 1 adopts No. 45 steel, and is made through quenching and te...

Embodiment 2

[0054] Embodiment 2: as Figure 1-4 , Figure 6-10 As shown, the process of this embodiment is mainly used to produce ∮270mm×15m electric poles, which are spliced ​​in the form of upper section 6m and lower section 9m. The specific steps are as follows:

[0055] 1.1. Arrange a group of non-prestressed tendons distributed around its axis according to the size and taper (1:75) of the proposed pole section, and the taper of each non-prestressed tendon relative to the axis of the proposed pole section is 1:75 ; Then in the inside of the cage surrounded by each non-prestressed tendon, along the axial direction of the cage, a circle of steel hoops 6 (bent by steel bars with a diameter of 6mm) is welded at intervals of 500mm, and each inner steel hoop 6 is Arranged coaxially, within a range of one meter from both ends, welding is carried out in the form of double inner steel hoops; and then a prestressed anchor steel plate 1 is coaxially installed at both ends of the cage. In this ...

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Abstract

The invention relates to a production technology of a high-strength post-tensioned reinforced concrete electric pole and the electric pole. The technical problem to be solved by the invention is to provide the production technology of the high-strength post-tensioned reinforced concrete electric pole and the electric pole produced by utilizing a post-tensioning technology. According to the technical scheme for solving the problem, the production technology comprises the following steps: firstly, weaving a reinforced cage, and ensuring that the tapers of the prestress steel rods relative to the axis of an electric pole to be manufactured are the same; secondly, hoisting the reinforced cage in an electric pole steel mould base, pouring concrete slurry, closing the mould, hoisting and placing in a balanced manner after centrifugal forming, demoulding after natural curing for three days, and then naturally curing for 21 days; thirdly, tensioning the tensioning ends of the prestress steel rods, locking nuts when design value is reached, and sawing unwanted parts of the prestress steel rods. The production technology is used for electric poles in power transmission and distribution lines.

Description

technical field [0001] The invention relates to a production process of concrete electric poles and electric poles obtained by using the process, especially a production process of high-strength post-tensioned reinforced concrete electric poles and electric poles produced by the process, which are mainly suitable for transportation in the distribution line. Background technique [0002] Reinforced concrete poles are used in the structure of substations and the supporting function of transmission and distribution lines. According to their uses, they are divided into straight poles, branch poles, corner poles, tension poles and terminal poles. They are still widely used in power distribution lines . In recent years, the innovation and invention of concrete poles are mainly to improve the structure and increase the strength level of concrete, but the force applied to the prestressed tendons is applied before the concrete is centrifugally formed, that is, the pretensioning prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B21/30B28B11/24E04H12/16
CPCB28B11/24B28B21/30B28B21/56E04H12/16
Inventor 林土方梁美富黄元斌徐迎峰林中圣金风华陈建平江兴友
Owner STATE GRID CORP OF CHINA
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