CN214460565U - Composite pile foundation for power transmission line - Google Patents
Composite pile foundation for power transmission line Download PDFInfo
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- CN214460565U CN214460565U CN202023080632.3U CN202023080632U CN214460565U CN 214460565 U CN214460565 U CN 214460565U CN 202023080632 U CN202023080632 U CN 202023080632U CN 214460565 U CN214460565 U CN 214460565U
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Abstract
The utility model discloses a composite pile foundation of a power transmission line, which comprises a precast pile pre-embedded underground and a bearing platform, wherein the top and the bottom of the precast pile are respectively connected with tower legs of the power transmission line and the precast pile; the precast pile is a cylindrical pile prefabricated by high-strength concrete of C60 or above, and the top of the precast pile is higher than the ground so that the bearing platform is not contacted with a corroded foundation; the bearing platform is a frustum of a metal framework and is connected with the precast pile through a plurality of support legs, and the support legs extend obliquely downwards and are in a divergent shape. The composite pile foundation of the power transmission line can be suitable for corrosive foundations and has the advantages of low construction difficulty, good corrosion resistance and the like.
Description
Technical Field
The utility model relates to a transmission line design field especially relates to a transmission line composite pile basis.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The method has the advantages of wide territory in China, complex engineering geological conditions, and wide distribution of expansive soil, saline soil, collapsible loess and frozen soil. In recent years, accidents of building foundation foundations occur frequently, and the building foundations are susceptible to settlement and expansion of foundation soil, so that huge economic loss is caused. The corrosive foundation generally contains underground water, and water and soil can be corrosive, which is easy to cause foundation accidents.
For corrosive foundations, the plate type foundations and the hole digging foundations of the power transmission lines can be improved in corrosion resistance by improving the strength grade of concrete and/or performing anticorrosive coating on the surfaces of the foundations. The cast-in-place pile foundation with strong corrosion and underground water can also adopt an anti-corrosion inclusion mode.
However, the plate-type foundation and the hole-digging type foundation of the power transmission line on the corrosion foundation are greatly influenced by construction conditions, and most of the foundations with the anticorrosion coatings are easy to fall off under the action of dry-wet alternation and corrosion for a period of time, so that the foundations lose protective clothing. As for the cast-in-place pile adopting the anticorrosion inclusion, the anticorrosion inclusion process is complex, and the anticorrosion material of the anticorrosion inclusion is easy to damage.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the problem that above-mentioned exists, provide a transmission line composite pile basis, can be applicable to and corrode the ground, have the construction degree of difficulty low, advantage such as corrosion resistance is good.
The utility model discloses a compound pile basis of transmission line, its characterized in that:
the device comprises a precast pile pre-buried underground and a bearing platform with the top and the bottom connected with a tower leg of the power transmission line and the precast pile respectively;
the precast pile is a cylindrical pile prefabricated by high-strength concrete of C60 or above, and the top of the precast pile is higher than the ground so that the bearing platform is not contacted with a corroded foundation;
the bearing platform is a frustum of a metal framework and is connected with the precast pile through a plurality of support legs, and the support legs extend obliquely downwards and are in a divergent shape.
Furthermore, foundation bolts are pre-buried in the tops of the precast piles, and the support legs are connected with tower foot plates fixedly connected with the support legs and the precast piles through the foundation bolts and nuts matched with the foundation bolts.
Furthermore, the top of the precast pile is 0.5-1.0 m higher than the ground, the bottom of the precast pile is at least inserted into the supporting layer, and a prestressed steel strand is arranged inside the precast pile.
Furthermore, the top of the bearing platform is connected with the tower legs through tower foot plates; and the top and bottom surfaces of the tower foot plates are respectively welded with an upper connecting plate connected with the tower legs through bolts and a lower connecting plate connected with the bearing platform.
Furthermore, the surface of the metal component of the bearing platform is subjected to hot-dip galvanizing treatment.
Furthermore, the bearing platform is a polygonal frustum or a cone frustum which is formed by connecting angle steels and bolts.
Furthermore, the bearing platform is a quadrangular frustum pyramid with a square cross section, and four corners of the bearing platform are respectively provided with one supporting leg.
Through comprehensively adopting the technical scheme, the utility model discloses can gain following beneficial effect:
1. the mechanized construction rate of the power transmission line is improved, and the construction safety risk is reduced
The lower foundation pile adopts a precast pile which can be precast in factories, and the stress requirement of the precast pile can be selected according to the requirement of construction machinery. The precast pile can select small diameter according to the bearing capacity requirement, and is convenient for transportation, processing and construction. The upper bearing platform is of a steel structure and can be processed in an iron tower plant and transported to a field for assembly. The foundation excavation can realize the mechanization of the whole process, and the risk of adopting manual construction is effectively reduced.
2. Improve the corrosion resistance of the foundation
Because the power transmission line is operated at a point, the concrete strength grade of the construction site is difficult to reach C40 and above in a stirring mode of concrete, and if the concrete with the strength grade of C50 and above is produced in a commercial concrete manufacturer, the commercial concrete has higher requirements on time and traffic conditions when being transported to the site. The precast pile can effectively solve the problems of concrete strength grade and transportation, thereby achieving the effect of improving the concrete corrosion resistance.
3. Shortening construction period and improving power grid construction efficiency
The conventional foundation has large excavation amount and low excavation speed. Concrete stirring and curing in situ results in a long construction period. By adopting the composite pile foundation of the power transmission line, the whole-component factory prefabrication can be realized, the construction period is shortened, and the construction difficulty is reduced; meanwhile, the whole process mechanical excavation is adopted, and the excavation efficiency is improved, so that the purposes of shortening the construction period and improving the construction efficiency are achieved.
4. Reduce the amount of foundation excavation and spoil projects, and enhance the environmental protection of the tower
The small-diameter precast pile can be selected, the size advantage is effectively utilized, the foundation excavation amount is reduced, and the tower position environment is protected favorably.
5. The economic benefit is remarkable, and the investment is effectively saved
Take 750kV alternating current engineering desert foundation as an example, adopt the utility model provides a transmission line composite pile basis practices thrift on-the-spot time limit for a project investment 40% ~ 50% than conventional anchor pile basis, practices thrift investment 10% ~ 15% than plate-type basis, has important meaning to reducing the engineering investment.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a schematic view of the overall structure of the present invention.
Description of reference numerals:
1-precast pile, 2-bearing platform, 3-supporting leg and 4-foundation bolt.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the drawings of the present invention, it should be understood that different technical features which are not mutually alternative are shown in the same drawing, and the embodiment described with reference to the drawings is not indicated or implied to include all the technical features in the drawings only for the convenience of simplifying the drawing description and reducing the number of drawings, and thus should not be understood as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
As shown in fig. 1, the utility model discloses a transmission line composite pile basis, the transmission line that wherein involves has the tower leg. The composite pile foundation comprises a precast pile 1 and a bearing platform 2, wherein the precast pile 1 is a concrete pile, and the bearing platform 2 is a metal framework.
The precast pile 1 is used as a foundation pile of the whole composite pile foundation and is precast by C60 and above high-strength concrete in a factory, and the corrosion resistance of the precast pile 1 is improved by adopting high-grade concrete. Consequently, precast pile 1 has stronger corrosion resistance and structural strength, and precast pile 1 does not receive the restriction of cast in place construction moreover, makes the utility model provides a composite pile basis can be applicable to the construction of corroding the transmission line of ground.
The precast pile 1 can be embedded underground, and the embedding depth is determined by calculation according to the bearing capacity; the bottom of the precast pile 1 is at least inserted downwards to the bearing layer, so that the bearing capacity of the precast pile meets the requirements of upward pulling and downward pressing stability. The top of the precast pile 1 is higher than the ground so that the bearing platform 2 is not contacted with a corroded foundation, the exposed height is higher than the submerged water level and higher than the spoil stacking height, the precast pile 1 is higher than the ground by 0.5-1.0 m under no special condition, and the dust is prevented from corroding the connecting part of the bearing platform 2 and the precast pile 1. The precast pile 1 is a cylindrical pile with a reinforced concrete structure, and can be reinforced by prestressed steel stranded wires for increasing the compactness of a pile body.
The bearing platform 2 is a frustum of metal framework, and can be a polygonal frustum or a cone frustum formed by connecting angle steel and bolts. The surface of the metal component of the bearing platform 2 can be treated by hot-dip galvanizing so as to improve the corrosion resistance. The bottom of the bearing platform 2 is connected with the precast pile 1 through a plurality of support legs 3, the support legs 3 extend downwards in an inclined mode and are in a divergence mode, and the support legs 3 have certain gradient. When the bearing platform 2 is a rectangular pyramid platform with a square cross section, four corners of the platform are respectively provided with a support leg 3, and the distance between the support legs 3 and the support legs 3 meets the construction requirement of the precast pile 1.
The top of the bearing platform 2 is connected with the tower legs of the power transmission line through the tower foot plates, can be called as upper tower foot plates and is used for loading the tower leg load above the upper tower foot plates, and the load comprises upper pulling, lower pressing and horizontal force. An upper connecting plate and a lower connecting plate are respectively welded on the top and bottom surfaces of the upper tower foot plate. The upper connecting plate is connected with the tower legs through bolts, and the lower connecting plate is connected with the bearing platform 2 through bolts. The stabilizer blade 3 of the bottom of cushion cap 2 also is connected with the tower sole, can be called lower tower sole, and lower tower sole is through pre-buried rag bolt 4 and the 1 fixed connection of precast pile at 1 top in precast pile. The foundation bolts 4 are provided with nuts, and the types of the foundation bolts can be selected according to the load of the bearing platform 2, the tower type of the power transmission line and the like.
At least one exemplary embodiment is now provided in connection with the drawings, a detailed description of which is provided in the drawings not intended to limit the scope of the claimed invention, but is merely representative of exemplary embodiments provided in the invention.
The exemplary embodiment specifically relates to a transmission line composite pile foundation suitable for corrosive ground, including precast pile 1, cushion cap 2, go up tower baseboard, lower tower baseboard, rag bolt 4 and a plurality of ordinary bolt, nut.
The precast pile 1 is precast in a factory by using high-strength concrete of C60 or above. The top of the precast pile 1 is 1.0m higher than the ground, and the bottom of the precast pile is inserted into the bearing stratum.
The bearing platform 2 is a metal high bearing platform, and the metal components are subjected to hot dip galvanizing treatment. The bearing platform 2 is erected on the top of the precast pile 1, and the bearing platform 2 is processed in an iron tower processing plant. The bearing platform 2 is connected with the tower legs on the upper portion of the bearing platform through an upper tower foot plate, the upper portion and the lower portion of the upper tower foot plate are respectively welded with connecting plates, and the two connecting plates are respectively connected with the tower legs and the bearing platform 2 through bolts. The bearing platform 2 is provided with a square cross section, the bottom of the bearing platform is provided with four support legs 3, and the lower tower foot plate is connected to the support legs 3. An anchor bolt 4 is embedded in the top of the precast pile 1, and the upper end of the anchor bolt 4 is fixed on the lower tower foot plate through a nut.
The power transmission line composite pile foundation applicable to the corrosion foundation in the exemplary embodiment has the advantages of being prefabricated in a factory, capable of being mechanically constructed, reducing construction difficulty, good in corrosion resistance and the like, and can overcome the limitations of an anticorrosive coating plate type foundation, a hole digging foundation and a wrapped cast-in-place pile.
The present invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification, and to any novel method or process steps or any novel combination of features disclosed.
Claims (7)
1. The utility model provides a compound pile foundation of transmission line which characterized in that:
the device comprises a precast pile pre-buried underground and a bearing platform with the top and the bottom connected with a tower leg of the power transmission line and the precast pile respectively;
the precast pile is a cylindrical pile prefabricated by high-strength concrete of C60 or above, and the top of the precast pile is higher than the ground so that the bearing platform is not contacted with a corroded foundation;
the bearing platform is a frustum of a metal framework and is connected with the precast pile through a plurality of support legs, and the support legs extend obliquely downwards and are in a divergent shape.
2. The power transmission line composite pile foundation of claim 1, wherein: the top of the precast pile is pre-embedded with foundation bolts, and the support legs are connected with tower foot plates fixedly connected with the support legs and the precast pile through the foundation bolts and nuts matched with the foundation bolts.
3. The power transmission line composite pile foundation of claim 1, wherein: the top of the precast pile is 0.5-1.0 m higher than the ground, the bottom of the precast pile is at least inserted into the supporting layer, and a prestressed steel strand is arranged inside the precast pile.
4. The power transmission line composite pile foundation of claim 1, wherein: the top of the bearing platform is connected with the tower legs through tower foot plates; and the top and bottom surfaces of the tower foot plates are respectively welded with an upper connecting plate connected with the tower legs through bolts and a lower connecting plate connected with the bearing platform.
5. The power transmission line composite pile foundation of claim 1, wherein: and the surface of the metal component of the bearing platform is subjected to hot-dip galvanizing treatment.
6. The power transmission line composite pile foundation of claim 1, wherein: the bearing platform is a polygonal frustum or a cone frustum which is formed by connecting angle steel and bolts.
7. The power transmission line composite pile foundation of claim 1, wherein: the bearing platform is a quadrangular frustum with a square cross section, and four corners of the bearing platform are respectively provided with one supporting leg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023080632.3U CN214460565U (en) | 2020-12-18 | 2020-12-18 | Composite pile foundation for power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023080632.3U CN214460565U (en) | 2020-12-18 | 2020-12-18 | Composite pile foundation for power transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214460565U true CN214460565U (en) | 2021-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023080632.3U Active CN214460565U (en) | 2020-12-18 | 2020-12-18 | Composite pile foundation for power transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214460565U (en) |
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2020
- 2020-12-18 CN CN202023080632.3U patent/CN214460565U/en active Active
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