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A live reinforcement method for a transmission tower

A technology of transmission tower and reinforcement, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of poor disaster resistance, inability to change towers in a large area, low safety margin, etc., to improve reinforcement and reinforcement. , Accurate transmission tower reinforcement and reinforcement work, the effect of high accuracy

Active Publication Date: 2018-08-17
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +2
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AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a live reinforcement method for transmission towers in view of the current situation that some existing transmission towers have low structural safety margins and poor disaster resistance, but the number of applications is large, towers cannot be replaced in large areas and power outages are required.

Method used

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  • A live reinforcement method for a transmission tower
  • A live reinforcement method for a transmission tower
  • A live reinforcement method for a transmission tower

Examples

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Embodiment 1

[0058] Example 1: 110kVZGU2 (7727) linear tower live reinforcement method

[0059] 1. According to the structural drawings and characteristic tables of transmission towers, ground wires, insulating strings and optical cables, etc., in computer finite element analysis software such as ANSYS, establish the line-tower coupling formed by the coupling of ground wires, insulating strings, optical cables and transmission towers model, such as figure 2 As shown, the height of the transmission tower is 21m.

[0060] 2. Carry out finite element structural strength calculation to determine the weak position of the structure. Boundary conditions and corresponding loads are applied. During the calculation process, the wind pressure at a wind speed of 30m / s is applied, and the wind direction of the strong wind is 90° to the direction of the line. After the calculation, the equivalent stress of the structural Mises is evaluated, as shown in image 3 As shown, it is the Mises equivalent st...

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Abstract

The present invention discloses a charged reinforcing and strengthening method for a power transmission tower, comprising the following steps: determining a structural weak portion of the power transmission tower and carrying out local reinforcement and strengthening on the structural weak portion in an angle steel attaching manner; and If implementation of local reinforcement and strengthening cannot meet a requirement, performing attaching reinforcement on four main legs of the power transmission tower in an integral reinforcing manner by using angle steels, wherein specifications of the angle steels are decreased from bottom to top gradually. According to the charged reinforcing and strengthening method for the power transmission tower, a line tower coupling model is established to perform finite structure strength measurement so as to determine the structural weak portion of the power transmission tower, thereby solving the problem of location ambiguity when the local charged reinforcement and the integral charged reinforcement are carried out on the power transmission tower; and when the integral reinforcement is carried out on the power transmission tower, the specifications of the angle steels are decreased from bottom to top gradually so as to solve the problem that the angle steels with the same specification are applied at different heights during the integral reinforcement to drastically increase stiffness of the power transmission tower.

Description

technical field [0001] The invention specifically relates to a live reinforcement method for a power transmission tower. Background technique [0002] High-voltage transmission tower is a kind of towering structure that is widely used. As an important lifeline power engineering facility, it has important economic and social significance to ensure the safe and reliable operation of the main structural system under various loads. With the development of my country's electric power industry, the voltage level of transmission lines is getting higher and higher, the span is getting bigger and bigger, and the height of the iron tower is also increasing. The 500kV Wuhu Yangtze River Great Span has a tower height of 229 meters and a single tower weight of 850 tons; the Dashengguan 500kV Yangtze River Great Span has a tower height of 257 meters and a single foundation of 4,800 cubic meters of concrete. The north-south crossing tower of the 500kV Jiangyin Yangtze River Great Span Pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 菅明健张广成李其莹张都清杨波孙晓斌邓化凌张忠文黄振宁袁堂青丁建伟张华恺
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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