Refrigeration structure of power transmission tower foundation in permafrost region

A technology for permafrost areas and tower bases, applied in infrastructure engineering, soil protection, protection devices, etc., can solve the problems of particle size, thickness and material type restrictions, to ensure long-term thermal stability, good promotion prospects, structure simple effect

Inactive Publication Date: 2015-04-22
COLD & ARID REGIONS ENVIRONMENTAL & ENG RES INST CHINESE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the existing patents are all aimed at subgrade engineering, with restrictions on particle size, thickness and material type

Method used

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  • Refrigeration structure of power transmission tower foundation in permafrost region
  • Refrigeration structure of power transmission tower foundation in permafrost region
  • Refrigeration structure of power transmission tower foundation in permafrost region

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Embodiment Construction

[0018] Below in conjunction with accompanying drawing, the technical scheme of the patent of the present invention is further described by following embodiment:

[0019] In this embodiment, the porous medium 3 is slag. The internal porosity of the slag is relatively large, with a porosity of 0.35. Air is diffused in it, and the voids are connected to each other. Natural convection and forced convection occur in the slag layer in the cool season, which makes the lower soil temperature lower; in the warm season, the slag layer has a low effective thermal conductivity and plays the role of heat conduction and heat insulation.

[0020] Such as figure 1 As shown, a refrigeration structure of a power transmission tower base in a permafrost region includes a natural surface 1, a tower base 2, a porous medium layer 3 and a geotextile 4. Tower base 2 is a perfusion cone-column foundation. In excavating the foundation pit of the transmission tower on the natural surface 1, a porous ...

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Abstract

The invention relates to a refrigeration structure of a power transmission tower foundation in a permafrost region. The refrigeration structure comprises a natural earth's surface, a tower foundation, a porous medium layer and geotechnical cloth. In a dug natural earth's surface pit, the porous medium layer is laid around the cast tower foundation; the geotechnical cloth is laid at the upper part of the porous medium layer; and the natural earth's surface is embedded above the geotechnical cloth. The refrigeration structure uses the porous medium layer for lowering the soil mass temperature to stop the water migration and the water discharge so as to prevent such damages as soil mass frost heaving and tower foundation thaw collapse and frost heaving; and in addition, as the porous medium layer is embedded around the tower foundation below the natural earth's surface, the thermal influence effect caused by the engineering disturbance can be quickly eliminated.

Description

technical field [0001] The patent of the present invention relates to a foundation structure of a power transmission tower utilizing the heat insulation and cooling performance and drainage effect of a porous medium layer. It is suitable for maintaining the stability of tower foundations in permafrost regions. Background technique [0002] With the development of the country's economy, power transmission projects in permafrost regions have gradually increased. During the construction and operation of the tower base in the permafrost area, the temperature of the ground rises, which causes the melting of the permafrost, the subsidence of the foundation, and the stability and service performance of the superstructure of the tower base are threatened. The cooling measure is the hot rod technology, which has high cost and complicated construction. Therefore, it is of great significance to develop a simple and low-cost power transmission tower base refrigeration structure to m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/115
CPCE02D3/115E02D31/00E02D31/14E02D2300/0079
Inventor 陈琳喻文兵易鑫刘伟博
Owner COLD & ARID REGIONS ENVIRONMENTAL & ENG RES INST CHINESE
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