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Production technology of large bending moment and high strength post tensioning reinforced concrete electric pole and electric pole

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., achieve the best safety and reliability, save steel, and have the effect of large bending moment

Active Publication Date: 2014-07-09
STATE GRID CORP OF CHINA +3
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  • 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 167.75kn.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 large bending moment and high strength post tensioning reinforced concrete electric pole and electric pole
  • Production technology of large bending moment and high strength post tensioning reinforced concrete electric pole and electric pole
  • Production technology of large bending moment and high strength post tensioning reinforced concrete electric pole and electric pole

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Experimental program
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Embodiment 1

[0050] Embodiment 1: as Figure 1-Figure 7 As shown, the process of this embodiment is mainly used to produce the whole single rod, and the specific steps are as follows,

[0051] 1.1. Set two coaxially arranged disc-shaped prestressed anchor steel plates 1 at both ends according to the length of the proposed pole, that is, the distance between the two prestressed anchor steel plates 1 is the length of the proposed pole; in this example The medium prestressed anchoring steel plate 1 is made of No. 45 steel, and is made through quenching and tempering heat treatment, and its thickness is 12-20 mm, which is determined according to the tension value. The outer side of the prestressed anchoring steel plate 1 is processed with a shoulder clip 23 whose thickness is half of the thickness of the prestressed anchoring steel plate 1. After the electric pole is manufactured, the shoulder clip 23 protrudes from the pole body; Holes 15 (there are six in this embodiment), each group of hol...

Embodiment 2

[0062] Embodiment 2: as Figure 1-Figure 6 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:

[0063] 1.1. Set two coaxially arranged disc-shaped prestressed anchor steel plates 1 at both ends according to the length of the upper section of the proposed pole, that is, the distance between the two prestressed anchor steel plates 1 is the length of the upper section of the proposed pole ; In this example, the prestressed anchor steel plate 1 is made of No. 45 steel, which is made by quenching and tempering heat treatment, and its thickness is 15mm. The outer side of the prestressed anchoring steel plate 1 is processed with a shoulder clip 23 whose thickness is half of the thickness of the prestressed anchoring steel plate 1. After the electric pole is manufactured, the shoulder clip 23 protrudes from the pole body; the prestress...

Embodiment 3

[0080] Embodiment 3: as Figure 1-Figure 6 As shown, the process of this embodiment is mainly used to produce ∮270mm×18m electric poles, which are spliced ​​in the form of an upper section of 9m and a lower section of 9m. The specific production process is basically the same as that of Example 2, the difference lies in the reinforcement of each pole different.

[0081] For the 9m pole section in the upper section, the reinforcement is as follows Figure 14 As shown, a total of eight seamless steel pipes 9 are arranged in the reinforcement cage, that is, eight prestressed steel strands 3 are arranged as prestressed tendons (the tension value is 872.59KN), and eight non-prestressed main reinforcements 4 are arranged at the same time. The steel pipes 9 are arranged alternately, and their length is 9m. There are four short bars 5, two of which are 6.5m in length as the first-level short bars, and the remaining two are 4m in length as the second-level short bars. The two-stage sho...

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Abstract

The invention relates to a production technology of a large bending moment and high strength post tensioning reinforced concrete electric pole and an electric pole, and mainly aims at providing the production technology of the large bending moment and high strength post tensioning reinforced concrete electric pole and the electric pole produced by using the post tensioning production technology. The production technology of the large bending moment and high strength post tensioning reinforced concrete electric pole includes the steps of 1, weaving a reinforcement cage, and confirming that taper degrees of all seamless steel tubes in the reinforcement cage relative to the axis of the reinforcement cage are equal; 2, hoisting the reinforcement cage into a base seat of an electric pole steel mold, pouring concrete sizing agents into the electric pole steel mold, closing the mold, lifting the mold off the base seat and placing the mold on a balance position after centrifugal shaping, performing mold releasing after three days of natural curing, and performing the natural curing for 21 days; 3, disposing a pre-stressed steel strand in the seamless steel tubes in penetration mode, anchoring one end of the pre-stressed steel strand, tensioning the other end of the pre-stressed steel strand, and locking up the tensioned end of the pre-stressed steel strand after design value is achieved. The production technology of the large bending moment and high strength post tensioning reinforced concrete electric pole is used on the electric pole in an electric line.

Description

technical field [0001] The present invention relates to a production process of concrete electric poles and the electric poles obtained by using the process, especially a production process of large bending moment and high strength post-tensioned reinforced concrete electric poles and the electric poles produced by the process, mainly Suitable for transmission and distribution lines. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B21/56B28B21/30B28B11/24E04H12/16
CPCB28B11/24B28B21/30B28B21/56E04H12/16E04H2012/006
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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