CN210395415U - High cantilever foundation of power transmission line - Google Patents
High cantilever foundation of power transmission line Download PDFInfo
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- CN210395415U CN210395415U CN201921129695.8U CN201921129695U CN210395415U CN 210395415 U CN210395415 U CN 210395415U CN 201921129695 U CN201921129695 U CN 201921129695U CN 210395415 U CN210395415 U CN 210395415U
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Abstract
The utility model discloses a high cantilever foundation of transmission line belongs to basic technical field for the transmission line. The foundation includes: the anchor rod assembly comprises a body (1) and at least two anchor rod assemblies (2), wherein the body (1) comprises a first part (11) located above the ground (3) and a second part (12) located below the ground (3), the upper end of the first part (11) is connected with an iron tower, and the second part (12) is fixed in a foundation (4); one end of each anchor rod component (2) is connected with the first part (11), and the other end of each anchor rod component is fixed in the foundation (4). The tensile property of at least two anchor rod assemblies (2) for the foundation can effectively improve the horizontal load resistance, reduce the displacement of the column top, increase the anti-overturning capacity, reduce the size and the buried depth of the body (1), and further reduce the foundation engineering quantity and the earth and stone volume.
Description
Technical Field
The utility model relates to a basic technical field for the transmission line, in particular to high cantilever foundation of transmission line.
Background
The foundation is used as an important component of the power transmission line, is the connection and transition between the iron tower and the foundation, and has the function of stably and smoothly transmitting the acting force of the iron tower on the foundation into the foundation without causing the instability of the foundation. When the power transmission line approaches to a mountainous terrain, in order to meet the requirement of the leg difference of the iron tower and reduce earth excavation, the foundation of part of tower positions needs to be set as a high cantilever foundation in consideration of the particularity of the mountainous terrain.
At present, in order to prevent the displacement or the overturn of the column top caused by the horizontal load action of the high cantilever foundation, the common practice is to increase the pile diameter of the high cantilever foundation or increase the burial depth of the high cantilever foundation.
The current method inevitably causes the increase of basic engineering quantity and earth and stone square quantity, thereby increasing the engineering investment and being not beneficial to the protection of ecological environment; meanwhile, the high cantilever foundation with large pile diameter is not easy to manufacture, and the implementation of the scheme is easy to influence.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a high cantilever basis of transmission line can prevent effectively that high cantilever basis from receiving the horizontal load effect and under the prerequisite that the displacement of capital or topple appears, reduces basic engineering volume and cubic meter of earth and stone volume.
Specifically, the method comprises the following technical scheme:
the embodiment of the utility model provides a transmission line high cantilever basis, the basis includes: a body and at least two anchor assemblies, wherein,
the body comprises a first part and a second part, wherein the first part is positioned above the ground, the second part is positioned below the ground, the upper end of the first part is connected with an iron tower, and the second part is fixed in a foundation;
one end of each anchor rod assembly is connected with the first portion, and the other end of each anchor rod assembly is fixed in the foundation.
In one possible design, the length of the first portion is greater than 1.5 m.
In one possible design, the body is a reinforced concrete body.
In one possible design, an embedded part is arranged on the body, and the iron tower is connected with the body through the embedded part.
In one possible design, each of the anchor rod assemblies includes an anchor rod, a first anchor plate, and a second anchor plate;
the first anchor plate and the second anchor plate are respectively arranged at two ends of the anchor rod;
the first anchor plate and one end of the anchor rod are arranged in the first portion, and the other end of the anchor rod and the second anchor plate are arranged in the foundation.
In one possible design, each of the anchor rods is a high-strength steel bar.
In a possible design, the diameter of each anchor rod is 25-36 mm.
In a possible design, the foundation is provided with a plurality of anchor holes, and one end of one anchor rod arranged in the foundation is penetrated in one anchor hole;
and high-strength concrete mortar is filled in each anchor hole.
In one possible design, the diameter of each anchor hole is 3-5 times the diameter of the anchor rod.
In one possible design, each of the anchor rods is disposed in the foundation over a length greater than 35 diameters.
In one possible design, the number of the anchor rod assemblies is 2-4;
the value range of the included angle of the ground projection of the anchor rods in the two adjacent anchor rod assemblies is 30-60 degrees.
The embodiment of the utility model provides a technical scheme's beneficial effect includes at least:
the first part of the body above the ground is connected with the iron tower, the second part below the ground is fixed in the foundation, one end of each anchor rod assembly is connected with the first part, the other end of each anchor rod assembly is fixed in the foundation, the body and at least two anchor rod assemblies can jointly bear the load of the iron tower, the body can bear downward pressing load and upward pulling load, and the at least two anchor rod assemblies can bear horizontal load and partial upward pulling load. The tensile property of at least two anchor rod assemblies is utilized, the horizontal load resistance of the anchor rod assemblies can be effectively improved, the displacement of the top of the column is reduced, the anti-overturning capacity is improved, the size and the buried depth of the body are reduced, and the foundation engineering quantity and the earth and stone volume are further reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic perspective view of a high cantilever foundation of a power transmission line provided in an embodiment of the present invention;
fig. 2 is a schematic perspective view of another power transmission line high cantilever foundation provided in the embodiment of the present invention;
fig. 3 is a top view of a high cantilever foundation of a power transmission line provided by an embodiment of the present invention;
fig. 4 is a top view of another power transmission line high cantilever foundation provided by the embodiment of the present invention.
The reference numerals in the drawings denote:
1-a body, 11-a first portion, 12-a second portion,
2-anchor rod assembly, 21-anchor rod, 22-first anchor plate, 23-second anchor plate,
3-the ground surface is adopted,
4-foundation, 41-anchor hole.
Detailed Description
For the grid, the transmission line is its basic structure. The foundation is used as an important component of the power transmission line, belongs to connection and transition between the iron tower and the foundation, plays a role in power transmission, and can enable the iron tower to be stably fixed on the foundation. When the power transmission line approaches to the mountainous terrain, in order to meet the requirement of the leg difference of the iron tower and reduce earth excavation, the foundation of part of the tower position needs to be set as a high cantilever foundation in consideration of the particularity of the mountainous terrain, namely, the length of the part of the foundation above the ground is higher than that of a common foundation.
Before further describing the embodiments of the present invention in detail, the orientation terms, such as "upper", "lower", "upper", etc., related in the embodiments of the present invention all use the orientation shown in fig. 1 or fig. 2 as the reference, and are only used to clearly describe the power transmission line high cantilever foundation of the embodiments of the present invention, and do not have the meaning of limiting the protection scope of the present invention.
Unless defined otherwise, all technical terms used in the embodiments of the present invention have the same meaning as commonly understood by one of ordinary skill in the art. In order to make the technical solutions and advantages of the present invention clearer, the following will describe the embodiments of the present invention in further detail with reference to the accompanying drawings.
In order to prevent that high cantilever foundation from receiving horizontal load effect and the displacement of capital or topple, the embodiment of the utility model provides a high cantilever foundation of transmission line, its spatial structure schematic diagram is shown in fig. 1 or fig. 2, and this basis includes: a body 1 and at least two bolt assemblies 2.
Wherein, the body 1 comprises a first part 11 above the ground 3 and a second part 12 below the ground 3, the upper end of the first part 11 is connected with a steel tower (not shown in the figure), and the second part 12 is fixed in the foundation 4;
each anchor assembly 2 is connected at one end to the first portion 11 and at the other end is secured in the foundation 4.
Therefore, the utility model discloses high cantilever basis of transmission line can utilize body 1 and two at least stock subassemblies 2 to undertake the load of iron tower jointly, and wherein, body 1 can undertake and push down load and pull out the load on, and two at least stock subassemblies 2 can undertake horizontal load and part and pull out the load on. The tensile property of at least two anchor rod assemblies 2 is utilized, the horizontal load resistance of the anchor rod assemblies can be effectively improved, the displacement of the top of a column is reduced, the anti-overturning capacity is improved, the size and the buried depth of the body 1 are reduced, and the foundation engineering quantity and the earth and stone volume are further reduced.
The structure of the transmission line high cantilever foundation of the embodiment of the present invention is further described and illustrated below:
to body 1, body 1 does the utility model discloses transmission line high cantilever foundation's structure basis.
The structural arrangement, which is bounded by the ground 3, may be divided into a first portion 11 and a second portion 12.
Wherein the first portion 11 is located above the ground 3, as shown in fig. 1, and may have a length greater than 1.5m to ensure that the foundation is a high-cantilever foundation; the second portion 12 is located below the ground 3 and is fixed in the foundation 4.
Alternatively, the body 1 may be a reinforced concrete body. The body 1 is formed by a reinforcement cage, which is cast with concrete to form the body 1.
In order to facilitate the connection between the iron tower and the body 1, an embedded part (not shown in the figure) is arranged on the body 1, and the iron tower can be connected with the body 1 through the embedded part.
Wherein, the built-in fitting can be fixed on body 1, and the built-in fitting can be rag bolt.
To stock subassembly 2, stock subassembly 2 has played the utility model discloses the effect of the high cantilever basic anti horizontal load of transmission line belongs to the utility model discloses the high cantilever basic key component of transmission line of embodiment.
Optionally, each anchor bar assembly 2 includes an anchor bar 21, a first anchor plate 22 and a second anchor plate 23.
Wherein the first anchor plate 22 and the second anchor plate 23 are respectively disposed at both ends of the anchor rod 21, as shown in fig. 1.
A first anchor plate 22 and one end of the anchor rod 21 are arranged in the first portion 11 and the other end of the anchor rod 21 and a second anchor plate 23 are arranged in the foundation 4.
The first anchor plate 22 is arranged, so that the anchor rod 21 can be in full anchoring connection with the body 1; through setting up second anchor slab 23 for stock 21 can be connected with the bed rock full anchor of ground, and then ensures the fixed stability in stock 21 both ends and fastness.
Optionally, each anchor rod 21 is a high-strength steel bar to ensure that the anchor rods 21 have sufficient tensile strength.
In terms of structural arrangement, the diameter of each anchor rod 21 may range from 25mm to 36mm, for example, the diameter of each anchor rod 21 may be 25mm, 30mm, 32mm, 36mm, and the like, which is not limited herein.
Optionally, the foundation 4 is provided with a plurality of anchor holes 41, and one end of one anchor rod 21 disposed in the foundation 4 is inserted into one anchor hole 41, as shown in fig. 1.
Each anchor hole 41 is filled with high-strength concrete mortar to ensure that the end of each anchor rod 21 disposed in the foundation 4 can be firmly fixed in the foundation 4.
Further, the diameter of each anchor hole 41 can be 3-5 times the diameter of the anchor rod 21, so as to ensure that each anchor rod 21 can be smoothly inserted into the corresponding anchor hole 41.
Each anchor rod 21 is provided in the foundation 4 over a length of more than 35 times its diameter to ensure that the end of the anchor rod 21 provided in the foundation 4 can be firmly fixed in the foundation 4.
After each anchor rod 21 is inserted into its corresponding anchor hole 41 in place, high strength concrete mortar may be injected into the anchor hole 41 using pressure grouting.
To the number of stock subassembly 2 the utility model discloses in the high cantilever basis of transmission line, the number of stock subassembly 2 can be for 2 ~ 4.
It should be noted that the number of the anchor rod assemblies 2 may also be more than 4, but the installation of too many anchor rod assemblies 2 is likely to increase the construction cost, and unless necessary, the number of the anchor rod assemblies 2 may be set to 2 to 4.
When the number of the anchor rod assemblies 2 is set to be 2-4, the included angle of the projection of the anchor rods 21 in the two adjacent anchor rod assemblies 2 on the ground 3 can be 30-60 degrees, as shown in fig. 3 or fig. 4, so that the anchor rod assemblies 2 can bear the horizontal load of the foundation together.
In actual use, the arrangement positions of the anchor rod assemblies 2 are determined according to specific conditions. For example, for a straight line tower, the direction of arrangement of the plurality of anchor assemblies 2 may be perpendicular or approximately in the line direction, as shown in fig. 3; for large angle tension towers, multiple anchor assemblies 2 may be placed outside the corners of the line, as shown in fig. 4.
So set up for the pulling force direction that a plurality of stock subassemblies 2 provided is opposite with the direction of the horizontal load that the basis received, thereby can make a plurality of stock subassemblies 2 effectively bear the horizontal load of basis, thereby reduce the top displacement of basis, improve the anti-overturning ability of basis.
And the included angle of each anchor rod component 2 and the body 1 is determined by the site topography, the horizontal load direction of the foundation and the like, and the value range of the included angle between the general anchor rod component 2 and the body 1 is 30-90 degrees.
In a possible example, can be according to following several steps construction realization the utility model discloses transmission line high cantilever basis of embodiment:
excavating a foundation pit for placing the second part 12;
mechanically drilling a plurality of anchor holes 41, and cleaning sediments in each anchor hole 41;
inserting one end of each anchor rod 21 and the second anchor plate 23 into the corresponding anchor hole 41;
placing a reinforcement cage of the body 1, and placing the other end of each anchor rod 21 and the first anchor plate 22 into the reinforcement cage where the first portion 11 is located;
after the position relation of the reinforcement cage and each anchor rod 21 is adjusted, high-strength concrete mortar is poured into each anchor hole 41 by adopting pressure grouting;
the concrete of the body 1 is poured.
The utility model discloses high cantilever foundation structure of transmission line simple structure, overall stability is good, and the construction process is simple, the tensile properties of a plurality of stock subassemblies of accessible full play 2 for a plurality of stock subassemblies 2 undertake the horizontal load of basis, and then effectively prevent that the basis from receiving the horizontal load effect and the capital displacement appears or topples, reduced body 1's size and buried depth, and then reduced basic engineering volume and earth and stone square volume, be favorable to ecological environment's protection.
In the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.
The above description is only for facilitating the understanding of the technical solutions of the present invention by those skilled in the art, and is not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A transmission line high cantilever foundation, characterized in that, the basis includes: a body (1) and at least two anchor assemblies (2), wherein,
the body (1) comprises a first part (11) positioned above the ground (3) and a second part (12) positioned below the ground (3), the upper end of the first part (11) is connected with an iron tower, and the second part (12) is fixed in a foundation (4);
one end of each anchor rod component (2) is connected with the first part (11), and the other end of each anchor rod component is fixed in the foundation (4).
2. The transmission line high cantilever foundation of claim 1, wherein the length of the first portion (11) is greater than 1.5 m.
3. The transmission line high cantilever foundation of claim 1, wherein the body (1) is a reinforced concrete body.
4. The transmission line high cantilever foundation of claim 1, wherein the body (1) is provided with an embedded part, and the iron tower is connected with the body (1) through the embedded part.
5. The transmission line high cantilever foundation of claim 1, wherein each of the anchor rod assemblies (2) comprises an anchor rod (21), a first anchor plate (22) and a second anchor plate (23);
the first anchor plate (22) and the second anchor plate (23) are respectively arranged at two ends of the anchor rod (21);
the first anchor plate (22) and one end of the anchor rod (21) are disposed within the first portion (11), and the other end of the anchor rod (21) and the second anchor plate (23) are disposed in the foundation (4).
6. The transmission line high cantilever foundation of claim 5, wherein each of the anchor rods (21) is a high-strength steel bar.
7. The transmission line high cantilever foundation of claim 5, wherein the diameter of each anchor rod (21) is in the range of 25-36 mm.
8. The transmission line high cantilever foundation of claim 7, wherein the foundation (4) is provided with a plurality of anchor holes (41), and one end of one anchor rod (21) arranged in the foundation (4) is arranged in one anchor hole (41);
and high-strength concrete mortar is filled in each anchor hole (41).
9. The transmission line high cantilever foundation of claim 8, wherein the diameter of each anchor hole (41) is 3-5 times the diameter of the anchor rod (21).
10. The transmission line high cantilever foundation of claim 5, wherein each of the anchor rods (21) is arranged in the foundation (4) for a length greater than 35 times its diameter.
11. The transmission line high cantilever foundation of claim 5, wherein the number of the anchor rod assemblies (2) is 2-4;
the value range of the included angle of the ground projection of the anchor rods (21) in the two adjacent anchor rod assemblies (2) is 30-60 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921129695.8U CN210395415U (en) | 2019-07-17 | 2019-07-17 | High cantilever foundation of power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921129695.8U CN210395415U (en) | 2019-07-17 | 2019-07-17 | High cantilever foundation of power transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210395415U true CN210395415U (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921129695.8U Active CN210395415U (en) | 2019-07-17 | 2019-07-17 | High cantilever foundation of power transmission line |
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| Country | Link |
|---|---|
| CN (1) | CN210395415U (en) |
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- 2019-07-17 CN CN201921129695.8U patent/CN210395415U/en active Active
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