CN112411607A - Anchor rod foundation for reinforcing power transmission line foundation - Google Patents
Anchor rod foundation for reinforcing power transmission line foundation Download PDFInfo
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- CN112411607A CN112411607A CN202011475030.XA CN202011475030A CN112411607A CN 112411607 A CN112411607 A CN 112411607A CN 202011475030 A CN202011475030 A CN 202011475030A CN 112411607 A CN112411607 A CN 112411607A
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- foundation
- anchor rod
- bearing platform
- transmission line
- power transmission
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses an anchor rod foundation for reinforcing a power transmission line foundation, and belongs to the field of power transmission line foundation reinforcement. An anchor rod foundation for reinforcing a power transmission line foundation comprises a bearing platform, wherein the bearing platform is poured on the periphery of an original foundation, and anchor rods are uniformly distributed in the bearing platform; a new tower foot plate is arranged above the bearing platform and is connected with the original tower foot plate in a welding way; a stiffening plate is arranged on the new tower foot plate and is welded and connected with the shoe plate on the original tower foot plate; and a concrete protective cap is poured above the bearing platform. The method reinforces the original hidden danger foundation, eliminates the potential safety hazard of the problem foundation to the operation of the line, avoids the influence of power failure caused by the technical schemes of line change, reconstruction and the like, and reduces the operation and maintenance cost.
Description
Technical Field
The invention belongs to the field of power transmission line foundation reinforcement, and particularly relates to an anchor rod foundation for power transmission line foundation reinforcement.
Background
The transmission line is a typical point-like project, with the development of power grid construction and other industries, the path selection of the transmission line is increasingly difficult, and the line path inevitably passes through some areas with traffic difficulties, even unmanned areas. The construction of the transmission line engineering mostly adopts a labor service subpackage mode, and the construction quality of the foundation subsection engineering in the areas with traffic difficulties is often closely related to the quality of subpackage teams. The contradiction between the rapid development of power grid construction and the field management lag is increasingly prominent, especially in rock mountainous areas with difficult traffic and great construction difficulty, the construction quality of basic engineering is often difficult to guarantee, and in recent years, the quality of basic engineering exposed in the early construction process is more and more, and the safety of the project which is put into operation is seriously influenced.
For the hidden trouble treatment of the project of the foundation subsection of the project of the power grid which is put into operation, the power failure maintenance is usually coordinated with the local power grid and even the whole power grid system, the power failure difficulty is large, and the influence range is wide.
Disclosure of Invention
The invention aims to overcome the defect that hidden danger exists in the existing power grid foundation engineering and power failure maintenance is needed, and provides an anchor rod foundation for reinforcing a power transmission line foundation.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
an anchor rod foundation for reinforcing a power transmission line foundation comprises a bearing platform, wherein the bearing platform is poured on the periphery of an original foundation, and anchor rods are uniformly distributed in the bearing platform;
a new tower foot plate is arranged above the bearing platform and is connected with the original tower foot plate in a welding way;
a stiffening plate is arranged on the new tower foot plate and is welded and connected with the shoe plate on the original tower foot plate;
and a concrete protective cap is poured above the bearing platform.
Furthermore, foundation bolts are embedded in the bearing platform, and the new tower foot plate is fixed on the bearing platform through the foundation bolts.
Furthermore, the horizontal direction of cushion cap is equipped with upper main muscle and lower floor's main muscle, is equipped with the stirrup of horizontal direction and the cushion cap lacing wire of vertical direction between the upper and lower floor's main muscle.
Further, the bearing platform is cast by adopting C30 concrete;
the upper layer main rib and the lower layer main rib both adopt HRB 400;
the hooping and the bearing platform lacing wire are both made of HPB 300.
Furthermore, the lower end of the anchor rod is arranged in the anchor hole, and the centering steel bar is arranged on the anchor rod positioned in the anchor hole;
the upper end of the anchor rod is provided with an additional anchor bar.
Furthermore, the anchor holes are filled with fine stone concrete, and the particle size of fine stones in the fine stone concrete is 5-8 mm.
Furthermore, an original foundation outer side vertical main rib and an original anchor rod outer side vertical main rib are arranged in the bearing platform;
the outer side of the vertical main reinforcement on the outer side of the original foundation is provided with an outer side stirrup of the vertical main reinforcement on the outer side of the original foundation;
and the outside of the vertical main reinforcement outside the anchor rod is provided with a stirrup outside the vertical main reinforcement outside the anchor rod.
Furthermore, the distance between the hoops at the outer sides of the adjacent outer vertical main reinforcements of the original foundation is 150mm, and the material is HPB 300;
the distance between the vertical main ribs at the outer sides of the adjacent anchor rods is 250mm, and the material is HRB 400;
the distance between the vertical main reinforcement outside stirrup in the adjacent stock outside is 150mm, and the material is HPB 300.
Furthermore, a lacing wire is arranged between the vertical main rib on the outer side of the original foundation and the vertical main rib on the outer side of the anchor rod.
Compared with the prior art, the invention has the following beneficial effects:
the anchor rod foundation for reinforcing the power transmission line foundation is an in-situ reinforcing scheme for the power transmission line foundation, is suitable for tower positions with serious quality problems of the power transmission line foundation, and consists of three parts: the anchor rod, the bearing platform and the new tower foot plate are arranged on the outer side of the original foundation; the bearing platform is arranged at the upper part of the anchor rod and the periphery of the original foundation, so that the integrity of the anchor rod and the original foundation is ensured; the new tower foot plate is arranged above the bearing platform, the new tower foot plate is connected with the original tower foot plate in a welding mode, and after construction is completed, the protective cap is integrally poured above the new tower foot plate. The method reinforces the original hidden danger foundation, eliminates the potential safety hazard of the problem foundation to the operation of the line, avoids the influence of power failure caused by the technical schemes of line change, reconstruction and the like, and reduces the operation and maintenance cost.
Drawings
FIG. 1 is a top plan view of a rock bolt foundation;
FIG. 2 is a front view of the anchor foundation;
FIG. 3 is a schematic view of the anchor rod construction;
FIG. 4 is a schematic view of an installation structure of the anchor rods and the centering steel bars;
FIG. 5 is a schematic view of the installation structure of the anchor rod and the additional anchor bar;
FIG. 6 is a schematic view of a reinforcement structure of the bearing platform;
FIG. 7 is a mounting structure diagram of the outer vertical main rib of the original foundation and the outer vertical main rib of the anchor rod;
FIG. 8 is a schematic view of the construction of a new footing plate;
FIG. 9 is a schematic view of the welding of a new tower foot;
FIG. 10 is a schematic structural view of a new tower footing plate stiffener;
FIG. 11 is a schematic view of the welding of the foot plate stiffener to the original shoe plate.
In the figure, 1-original basis; 2-anchor rod; 3-a cushion cap; 4-bearing platform lower layer main reinforcement; 5-main reinforcement on the upper layer of the bearing platform; 6-cushion cap lacing wire; 7-stirrup; 8-centering the reinforcing steel bars; 9-additional anchor bars; 10-vertical main reinforcement outside the anchor rod; 11-outside stirrups of the vertical main reinforcements outside the anchor rods; 12-vertical main ribs on the outer side of the original foundation; 13-the outer stirrup of the outer vertical main reinforcement of the original foundation; 14-stretching a rib; 15-foundation bolts; 16-new tower footing plate; 17-original tower footing plate; 18-a stiffening plate.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Based on the potential hazards of the line foundation found in the operation and maintenance process of a certain 500kV power transmission line project and a certain 220kV power transmission line project, the anchor rod foundation for reinforcing the power transmission line foundation is provided under the condition that the operation of the main power grids in the two regions is not influenced. Compared with other processing schemes such as power failure reconstruction, local relocation and the like, the method can save investment to a great extent and can also avoid social and economic losses caused by power failure.
The anchor rod foundation for reinforcing the power transmission line foundation provided by the invention is an in-situ reinforcing scheme of the power transmission line foundation, and is suitable for tower positions with serious quality problems of the power transmission line foundation, the bearing capacity provided by the problem foundation cannot be estimated, and the operation safety of a line is seriously influenced. An anchor rod for reinforcing a power transmission line foundation is composed of three parts: stock, cushion cap and new column foot board. The anchor rods are arranged on the outer side of the original foundation in a square arrangement mode; the bearing platform is arranged at the upper part of the anchor rod and the periphery of the original foundation, so that the integrity of the anchor rod and the original foundation is ensured; the new tower foot plate is arranged above the bearing platform and is connected with the bearing platform through a foundation bolt, the new tower foot plate is connected with the original tower foot plate in a welding mode, and after construction is completed, the protective cap is integrally poured above the new tower foot plate.
The utility model provides a power failure influence that is used for reinforced (rfd) transmission line foundation's stock foundation can consolidate former hidden danger basis, eliminates the potential safety hazard of problem basis to the circuit operation, can avoid technical scheme such as circuit change to rebuild to bring again reduces the operation maintenance cost. The scheme is successfully applied to a certain 500kV power transmission line and a certain 220kV power transmission line at present, has an obvious effect, and can provide reference for subsequent power transmission line engineering foundation hidden danger treatment.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1 to 10, the anchor rod foundation for reinforcing the power transmission line foundation according to the present invention includes an anchor rod 2, a cap 3 and a new footing plate 16. The bearing platform 3 adopts a square cross section and is poured by taking the original foundation 1 as the center; the anchor rods 2 are uniformly arranged along the outer side of the original foundation 1 and the inner part of the bearing platform 3; the new tower foot plate 16 is arranged above the bearing platform 3 and is reliably connected with the bearing platform 3 by using the foundation bolt 15 pre-embedded in the bearing platform 3, and the new tower foot plate 16 is connected with the original tower foot plate 17 by welding; and arranging a stiffening plate 18 above the new tower foot plate 16, welding and connecting the stiffening plate 18 and the shoe plate on the original tower foot plate 17, and finally integrally pouring a concrete protective cap.
Referring to fig. 1 and 2, fig. 1 and 2 are a top view and a front view of the anchor rod foundation respectively, the bearing platform 3 is of a square section, the original foundation 1 is nested in the center of the bearing platform 3, and the concrete of the bearing platform 3 is C30. Before construction, the concrete surface of the original problem foundation 1 in the depth range of the bearing platform 3 is roughened and cleaned, and bar planting measures can be carried out in the original foundation 1 if necessary, so that the integrity of the newly-poured bearing platform and the poured original problem foundation is ensured. The width B of the bearing platform 3 is determined according to the number of the anchor rods 2, and the requirements of the distance and the edge distance of the anchor rods 2 are met. The height h of the bearing platform 3 meets the anchoring requirement of the anchor rod 2. An upper layer main rib 5 and a lower layer main rib 4 are arranged in the horizontal direction of the bearing platform 3, and a hoop rib 7 in the horizontal direction and a bearing platform tie rib 6 in the vertical direction are arranged between the upper layer main rib and the lower layer main rib. The upper-layer main reinforcement 5 and the lower-layer main reinforcement 4 of the bearing platform adopt HRB400, and the stirrup 7 and the bearing platform tie bar 6 adopt HPB 300.
Referring to fig. 3, fig. 3 is a structural schematic view of the anchor rod; the anchor bars of the anchor rod 2 are HRB400 steel bars, and parameters such as the diameter d, the number, the depth and the like of the steel bars are determined by calculation according to the foundation acting force and the parameters of foundation soil. The diameter D1 of the anchor hole of the anchor rod 2 is 2-3 times of the diameter D of the anchor bar and is not less than (D +50) mm. An additional anchor bar 9 is arranged in the range of 300mm at the upper end of the anchor rod 2 to increase the anchorage in the bearing platform. And the centering steel bars 8 are arranged on the anchor rod 2 in the anchor hole so as to ensure the verticality of the anchor rod during construction. And when the anchor rod 2 is constructed, construction gaps of 200mm should be reserved at the upper end and the lower end of each anchor bar. After the anchor bars are installed, the anchor holes are filled with fine stone concrete, the strength requirement is not lower than C30, the particle size of the fine stone is preferably 5-8 mm, medium sand is preferably adopted, and the anchor holes are cleaned before filling.
Referring to fig. 4, fig. 4 is a schematic view of an installation structure of the anchor rod and the centering steel bar, and the centering steel bar 8 is arranged at the periphery of the anchor rod 2 to be perpendicular to the anchor rod during construction.
Referring to fig. 5, fig. 5 is a schematic view of an installation structure of the anchor rod and the additional anchor bars, and 3 additional anchor bars 9 are uniformly distributed on the periphery of the anchor rod 2 to increase the anchoring property in the bearing platform.
Referring to fig. 6, a reinforcement structure schematic diagram of the bearing platform of fig. 6 is shown, wherein vertical main ribs 12 on the outer side of the original foundation are arranged inside the bearing platform 3 along the periphery of the original foundation 1, the distance between the vertical main ribs 12 on the outer side of the adjacent original foundation is 200mm, and the material is HRB 400; the outer side of the original foundation outer side vertical main reinforcement 12 is provided with outer side stirrups 13 of the original foundation outer side vertical main reinforcement, the distance between the adjacent outer side stirrups 13 of the original foundation outer side vertical main reinforcement is 150mm, and the material is HPB 300; inside the cushion cap 3, set up the vertical main muscle 10 in the stock outside along the stock 2 outside, interval 250mm between the vertical main muscle 10 in adjacent stock outside, HRB400 is chooseed for use to the material, and the vertical main muscle 10 outside in the stock outside sets up the vertical main muscle outside stirrup 11 in the stock outside, and interval 150mm between the vertical main muscle outside stirrup 11 in adjacent stock outside, the material adopts HPB 300.
Referring to fig. 7, fig. 7 is a mounting structure diagram of the original foundation outside vertical main rib and the anchor rod outside vertical main rib, a tie bar 14 is arranged between the original foundation outside vertical main rib 12 and the anchor rod outside vertical main rib 10, and the tie bar 14 has an upper layer, a middle layer and a lower layer.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a new tower foot plate, 8 new foundation bolts 15 are embedded in the bearing platform 3, specifications of the foundation bolts 15 are determined according to stress conditions of an iron tower, and the material is 35# steel or 42 CrMo. A new tower foot plate 16 is arranged above the bearing platform 3, and the new tower foot plate 16 is connected with the bearing platform 3 through an anchor bolt 15 pre-embedded in the bearing platform 3. The anchor bolt 15 both sides are equipped with the lacing wire, and the interval between the adjacent lacing wire is 200 mm.
Referring to fig. 9, fig. 9 is a schematic view of the welding of a new tower foot plate; the new tower foot plate 16 is formed by splicing two symmetrical steel plates, the original tower foot plate 17 is fixedly embedded in the center of the new tower foot plate, and the new tower foot plate is welded with the original tower foot plate 17 by adopting a groove.
Referring to fig. 10 and 11, fig. 10 and 11 are schematic diagrams illustrating a new tower foot plate stiffening plate and a welding of the stiffening plate and an original shoe plate, respectively, wherein the stiffening plate 18 is arranged above a new tower foot plate 16, the stiffening plate 18 and the shoe plate on the original tower leg are welded, and finally, a concrete protective cap is integrally poured.
The construction method mainly comprises the following steps:
1) arranging an anchor hole and an anchor rod 2 on the periphery of an original foundation 1, placing the anchor rod 2 in the anchor hole through a centering steel bar 8, cleaning the hole after finishing the operation, arranging an additional anchor bar 9 at the upper end of the anchor rod 2, and then filling the anchor hole with fine aggregate concrete;
2) chiseling the surface of the original foundation 1, cleaning, binding a reinforcing mesh, and embedding foundation bolts 15;
3) after the steel bars are bound, laying a template and pouring concrete on the bearing platform 3;
4) paving a new tower foot plate 16 until the concrete strength of the bearing platform 3 reaches 70%, and fastening foundation bolts 15;
5) performing groove welding on a new tower foot plate 16 and an original tower foot plate 17;
6) welding the stiffening plate 18 and the shoe plate on the original step plate 17;
7) and after the welding work is finished, integrally pouring a concrete protective cap above the bearing platform 3, and well preparing base surface water dispersion.
The invention provides an anchor rod foundation for reinforcing the foundation of a power transmission line on the basis of the potential hazards of the line foundation found in the operation and maintenance process of a certain 500kV power transmission line project and a certain 220kV power transmission line project under the condition that the operation of main power grids in the two regions is not influenced. Compared with other treatment schemes such as line relocation and reconstruction, the method can save investment to a great extent, can avoid social and economic losses caused by power failure construction, and provides reference for treating foundation hidden dangers of other power transmission line projects.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (9)
1. The anchor rod foundation for reinforcing the power transmission line foundation is characterized by comprising a bearing platform (3), wherein the bearing platform (3) is poured on the periphery of an original foundation (1), and anchor rods (2) are uniformly distributed in the bearing platform (3);
a new tower foot plate (16) is arranged above the bearing platform (3), and the new tower foot plate (16) is connected with the original tower foot plate (17) in a welding way;
a stiffening plate (18) is arranged on the new tower foot plate (16), and the stiffening plate (18) is welded with the shoe plate on the original tower foot plate (17);
and a concrete protective cap is poured above the bearing platform (3).
2. The anchor rod foundation for reinforcing the power transmission line foundation as claimed in claim 1, wherein foundation bolts (15) are embedded in the bearing platform (3), and the new tower foot plate (16) is fixed on the bearing platform (3) through the foundation bolts (15).
3. The anchor rod foundation for reinforcing the power transmission line foundation as claimed in claim 1, wherein the bearing platform (3) is provided with an upper layer main rib (5) and a lower layer main rib (4) in the horizontal direction, and a horizontal hoop rib (7) and a vertical bearing platform tie rib (6) are arranged between the upper layer main rib and the lower layer main rib.
4. The anchor rod foundation for reinforcing the power transmission line foundation as claimed in claim 1, wherein the bearing platform (3) is cast by adopting C30 concrete;
the upper layer main rib (5) and the lower layer main rib (4) both adopt HRB 400;
the hooping (7) and the bearing platform lacing wire (6) both adopt HPB 300.
5. The anchor rod foundation for reinforcing the power transmission line foundation as claimed in claim 1, wherein the lower end of the anchor rod (2) is arranged in the anchor hole, and the centering steel bar (8) is arranged on the anchor rod (2) in the anchor hole;
the upper end of the anchor rod (2) is provided with an additional anchor bar (9).
6. The anchor rod foundation for reinforcing the power transmission line foundation according to claim 5, wherein the anchor holes are filled with fine stone concrete, and the particle size of fine stone of the fine stone concrete is 5-8 mm.
7. The anchor rod foundation for reinforcing the power transmission line foundation as claimed in claim 1, wherein the bearing platform (3) is internally provided with an original foundation outer side vertical main rib (12) and an anchor rod outer side vertical main rib (10);
the outer side of the vertical main reinforcement (12) on the outer side of the original foundation is provided with an outer stirrup (13) of the vertical main reinforcement on the outer side of the original foundation;
and the outside of the vertical main reinforcement (10) on the outer side of the anchor rod is provided with a stirrup (11) on the outer side of the vertical main reinforcement on the outer side of the anchor rod.
8. The anchor rod foundation for reinforcing the power transmission line foundation as claimed in claim 7, wherein the distance between the outer stirrups (13) of the adjacent outer vertical main reinforcements of the original foundation is 150mm, and the materials are HPB 300;
the distance between the vertical main ribs (10) at the outer sides of the adjacent anchor rods is 250mm, and the material is HRB 400;
the distance between the outer stirrups (11) of the vertical main reinforcement on the outer side of the adjacent anchor rods is 150mm, and the materials are HPB 300.
9. The anchor rod foundation for reinforcing the power transmission line foundation as claimed in claim 1, wherein a tie bar (14) is arranged between the original foundation outer side vertical main bar (12) and the anchor rod outer side vertical main bar (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011475030.XA CN112411607A (en) | 2020-12-15 | 2020-12-15 | Anchor rod foundation for reinforcing power transmission line foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011475030.XA CN112411607A (en) | 2020-12-15 | 2020-12-15 | Anchor rod foundation for reinforcing power transmission line foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112411607A true CN112411607A (en) | 2021-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011475030.XA Pending CN112411607A (en) | 2020-12-15 | 2020-12-15 | Anchor rod foundation for reinforcing power transmission line foundation |
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| CN (1) | CN112411607A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115419101A (en) * | 2022-08-30 | 2022-12-02 | 国网福建省电力有限公司经济技术研究院 | Existing foundation bolt reinforcing device for power transmission line tower and construction method thereof |
-
2020
- 2020-12-15 CN CN202011475030.XA patent/CN112411607A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115419101A (en) * | 2022-08-30 | 2022-12-02 | 国网福建省电力有限公司经济技术研究院 | Existing foundation bolt reinforcing device for power transmission line tower and construction method thereof |
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