Iron tower foundation of overhead power transmission line severely-weathered rock formation winding anchor rod

A technology for power transmission lines and iron tower foundations, which is applied in the field of iron tower foundations, can solve problems such as not being able to meet the use requirements of tower foundations with large loads, and achieve the effects of improving the uplift load capacity, improving the technical level, and increasing the bearing capacity of anchor rods

Inactive Publication Date: 2009-01-21
孟庆波 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, despite this, the current bolt foundation in our country can only be used for moderately weathered rock formations, and is very cautious in the use of a large number of strongly weathered rock formations, and cannot meet the requirements for the use of large-load tower foundations.

Method used

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  • Iron tower foundation of overhead power transmission line severely-weathered rock formation winding anchor rod
  • Iron tower foundation of overhead power transmission line severely-weathered rock formation winding anchor rod
  • Iron tower foundation of overhead power transmission line severely-weathered rock formation winding anchor rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] like Figure 1 to Figure 4 as shown, figure 1 It is a schematic diagram of the main structure of the present invention; figure 2 It is the embodiment that the steel bar L section of the present invention is filled with a viscosity-reducing layer; image 3 It is an embodiment in which a filling layer and a concrete layer are sequentially arranged in the L section of the steel bar of the present invention from bottom to top; Figure 4 It is an embodiment of the present invention for corner or tension tower base.

[0027] According to the conventional method, one end has a screw thread, the diameter is 60mm, and the steel bar 2 with an effective length of 4 meters, extending downward from the lower end of the threaded section to 1 meter is the L section, and the L section is at least uniformly dense with a commercially available wide plastic tape. Wrap one layer; then use a combined light drilling rig to drill a hole with a diameter of 120mm and a depth of 4.15 meters ...

Embodiment 2

[0029] Bolts with a diameter of 110mm and an effective length of 4 meters are processed, and the L section is 0.5 meters; a drilling machine is used to form a rock hole with a diameter of 130mm and a depth of 4 meters on the strongly weathered rock formation, and then the bolt is placed in the rock hole for positioning Pour fine concrete 3 to the upper end of the anchoring section m, that is, 3.5 meters, pour sand from the rock opening after the strength is up, and use the submersion method to compact the sand layer at the rock opening, and the L section becomes the filling layer 4, or pour in The fine stone is tamped to the rock hole to form a single anchor rod; the tower foundation is formed according to conventional techniques.

Embodiment 3

[0031] Process anchor bolts with a diameter of 100mm and an effective length of 5 meters. The rock hole diameter is 130mm and the depth is 5.15 meters. In order to increase the strength, pour fine stones from the rock hole to 4.5 meters for compaction, and then pour fine stone concrete 3 to the rock hole, so as to have a high pull-up force and a good resistance level. force. Other conditions are identical with embodiment 1.

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Abstract

The invention relates to a pile specially for electric power foundation engineering or other members, in particular to an iron tower foundation that a strong weathered rock stratum is enlaced on an anchor rod in an overhead power transmission line, which is the preferable adoption of the strong weathered rock stratum and can be also used as a medium or micro-weathered rock stratum. The iron tower foundation comprises rock holes molded by mechanical drilling and steel reinforcement positioned in the rock holes; concrete is poured in a gap between the steel reinforcement and the rock holes in the radial direction; and the periphery of the L-shaped section of the upper part of the steel reinforcement is provided with a viscosity reducing layer for reducing the bonding strength with the concrete. Through analyzing the stress state of a single anchor rod of the tower foundation, the iron tower foundation adopts a series of technical measures in order that the load on the anchor rod is substantially improved compared with the prior single anchor rod with the same specification, and has prominent and unexpected effects that the tower foundation of a 500 and 1, 000 kilovoltage high-voltage overhead power transmission line is possibly arranged on the strong weathered rock stratum. In addition, as the rock holes are molded by mechanical drilling, the tower foundation improves the construction efficiency, reduces labor intensity, saves massive raw material, reduces construction cost and improves the safe coefficient of the tower foundation.

Description

technical field [0001] The invention relates to special piles or other components for electric power foundation engineering, in particular to an iron tower foundation with anchor rods wrapped around strong weathered rock formations for overhead power transmission lines. First choice in heavily weathered rock formations, but can also be used in moderately or lightly weathered rock formations. Background technique [0002] With the rapid development of my country's electric power industry, 500 kV high-voltage overhead power transmission lines and 1000 kV overhead power transmission lines are becoming backbone grids. And it is developing towards multi-circuit, multi-split, large-section 400mm2 and 630mm2 wires. As a result, the uplift, downward pressure and horizontal thrust of the line tower foundation are increased, and the load of the tower foundation is obviously increased. Many overhead power transmission lines pass through mountainous areas, high mountainous areas and s...

Claims

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Application Information

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IPC IPC(8): E02D27/42
Inventor 孟庆波曾嵘
Owner 孟庆波
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