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Method for controlling foundation crack of extra-high voltage combined electrical apparatus GIS equipment

A technology of equipment foundation and control method, which is applied in infrastructure engineering, water conservancy engineering, artificial islands, etc., can solve problems such as easy cracks, and achieve the effect of reducing hazards and facilitating construction

Inactive Publication Date: 2009-12-23
NORTH CHINA POWER ENG BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the foundation size and volume of 1000kV GIS equipment are larger than those of ordinary high-voltage GIS equipment, cracks are more likely to occur

Method used

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  • Method for controlling foundation crack of extra-high voltage combined electrical apparatus GIS equipment
  • Method for controlling foundation crack of extra-high voltage combined electrical apparatus GIS equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The distribution of the cable trenches on the surface of the foundation in Example 1 facilitates the use of them as surface expansion joints, and the surface temperature expansion joints can be set using the surface cable trenches. Depend on figure 2 It can be seen that 10 is the foundation, 11 is the temperature expansion joint, 12 is the post-construction pouring belt, 13 is the cable trench, and 14 is the embedded part in the foundation. The specific steps of embodiment 1 refer to figure 1 as follows:

[0037] 11) Along the length direction, on the mass concrete foundation 10, the position corresponding to the telescopic joint on the electrical equipment will neither affect the force of the foundation, but also avoid the embedded parts 14 and the cable trench 13, and will not affect the installation position of the equipment Set the transverse temperature expansion joint 11;

[0038] 12) For the single equipment foundation that is still too long after the tempera...

Embodiment 2

[0043] In Example 2, the distribution of the cable trenches on the surface of the foundation is inconvenient to use as surface expansion joints, so other methods must be used to set the temperature expansion joints. The concrete steps of embodiment 2 are as follows:

[0044] 21) Along the length direction, on the mass concrete foundation, the position corresponding to the telescopic joint on the electrical equipment will neither affect the force of the foundation, but also avoid embedded parts and cable trenches, and will not affect the position where the equipment is installed. Set the transverse temperature expansion joints;

[0045] 22) For the single equipment foundation that is still too long after the temperature expansion joint is set, set the post-construction pouring belt to reduce the temperature deformation of the foundation;

[0046] 23) Set slits at appropriate positions on the foundation surface, and use slits as temperature expansion joints;

[0047] 24) The 1...

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Abstract

The embodiment of the invention discloses a method for controlling the foundation crack of extra-high voltage totally-enclosed combined electrical apparatus GIS equipment. The method specifically includes the steps of arranging a horizontal temperature expansion joint; arranging a late poured band for a single equipment foundation that is still overlong after the temperature expansion joint is arranged; arranging a surface temperature expansion joint; concreting in lifts; and calculating foundation temperature stress and conducting reinforcement construction. The method for controlling the foundation crack of 1000kV totally-enclosed combined electrical apparatus GIS equipment has the advantages of obvious anti-crack effect, good control on the generation and development of cracks and reduction of harm to engineering, flexibility and simpleness, adjustment available according to different implementation situations and selection of a more suitable mode for control, no influence on the normal operation of equipment, etc.

Description

technical field [0001] The invention relates to the field of electrical equipment, in particular to a method for controlling foundation cracks of UHV combined electrical GIS equipment. Background technique [0002] With the improvement of power grid capacity and transmission line level, the voltage level of my country's substations has been continuously improved, from the original 220kV to 330kV, 500kV, 750kV and to UHV ±800kV DC and 1000kV. Therefore, 1000kV GIS equipment has also begun to be used in UHV substations, and the corresponding 1000kV GIS equipment foundation has also replaced the original ordinary high-voltage GIS equipment foundation. [0003] 1000kV GIS equipment has higher requirements on the flatness and cleanliness of the installation site than ordinary high-voltage GIS equipment, and the weight and volume of the equipment are also higher than ordinary high-voltage GIS equipment. Spend. And because its electrical components are all sealed in the SF6 gas c...

Claims

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Application Information

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IPC IPC(8): E02D27/44E02D29/16
Inventor 张建坤张甲雷郭东锋彭敏文何民李伟科罗培箐宋利吴祎琼王静成庞亚东张涛
Owner NORTH CHINA POWER ENG BEIJING
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