Method for erecting poles and towers of power transmission lines passing through coal gangue area

A technology of transmission lines and coal gangue, which is applied in the field of pole tower assembly in the area where transmission lines pass through coal gangue, to achieve the effects of reducing the amount of earth and rocks, reducing construction costs, and reasonable paths

Active Publication Date: 2015-09-16
STATE GRID CORP OF CHINA +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a method for erecting poles and towers in the area where transmiss...

Method used

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  • Method for erecting poles and towers of power transmission lines passing through coal gangue area
  • Method for erecting poles and towers of power transmission lines passing through coal gangue area

Examples

Experimental program
Comparison scheme
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Embodiment

[0021] Step 1, erect the transmission line in an overhead manner.

[0022] Step 2: When the transmission line passes through the landfill, the tower foundation is cast with formwork, and then backfilled with soil; the tower foundation uses a combined stepped foundation that connects the foundation cushion and the column head with connecting beams, and at the same time builds slope protection and barriers Earth wall; the filling grouting in the retaining wall is filled with 10% coal gangue, and the retaining wall is buried deep to the permafrost layer to ensure that the foundation of the retaining wall is not deformed by the freezing expansion of coal gangue.

[0023] Step 3: For the grounding of the tower, replace the soil with silty clay and compact it and use the SDF-I graphite grounding module for grounding; the main material of each base tower is Q420 high-strength steel, Φ12 round steel is used for grounding separately, and the connecting part with the tower is 50×4 flat s...

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Abstract

The invention relates to a method for assembling electric transmission lines through coal gangue area towers. The method comprises that the electric transmission lines are erected according to an overhead method; when the electric transmission lines pass dumping areas, combined step foundations of which foundation pads are connected with column heads through connecting beams serve as tower foundations, and meanwhile, protection slopes and retaining walls are built in a masonry mode; and soil substitutes for silty clay to be tamped, and SDF-I type graphite grounding modules are grounded, so that the towers are grounded. According to the method, paths are reasonable, work periods are short, the investment is low, the implementation and the maintenance are convenient, gaps of erection of the towers under the geological conditions of coal gangue areas are filled, and a solid foundation is laid for providing of technical support for assembly of concrete poles, communication poles, crossing frames, ring-network cabinets and box-type substations and even construction of new substations under the geological conditions of coal gangue, oil shale, strong weathered rocks and the like in the future.

Description

technical field [0001] The invention relates to a method for erecting a transmission line, in particular to a method for assembling a transmission line through a pole tower in a coal gangue area. Background technique [0002] The main chemical components of coal gangue are SiO2 and Al2O2. Pozzolanic reaction occurs in Ca(OH) 2 solution to form calcium silicate hydrate and calcium aluminate hydrate gel, and coal gangue crystallizes and hardens with the continuous production of hydrate. At the same time, by analyzing the effect of stabilizing the antifreeze performance of coal gangue mixture, it is known that the hydration reaction of coal gangue occurs after several freeze-thaw cycles, and its quality will continue to increase. Coal gangue is stored for a long time, occupying a large amount of land, and a large amount of dust acid water is produced by weathering and decomposition. Ionized water with heavy metals. It will pollute the atmosphere, surface water sources or inf...

Claims

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Application Information

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IPC IPC(8): E02D27/32E02D27/42
Inventor 张大霖李险峰孙洪新李萍
Owner STATE GRID CORP OF CHINA
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