Power transmission line tower foundation

Abstract

The utility model relates to the technical field of pole tower foundations, and discloses a power transmission line pole tower foundation which comprises a foundation table, an expansion table is placed below the foundation table in a stacked mode, a first pouring channel is formed in the center of the foundation table in the vertical direction, and a second pouring channel is formed in the center of the expansion table in the vertical direction. A flange base is fixedly installed at the center of the first pouring channel through a first steel bar frame, and connecting steel bars are fixedly installed in the second pouring channel through a second steel bar frame. The stacked foundation platform and expansion platform form a step shape, the first pouring channel and the second pouring channel form a step hole, and a connecting material is poured in the first pouring channel and the second pouring channel which are communicated with each other. Through the construction mode of modular prefabrication and small-amount cast-in-place, prefabricated parts can be produced in batches in a workshop and matched according to needs, in addition, the cast-in-place concrete amount is small, the construction period is remarkably shortened, and a firm overall foundation can be formed after the concrete is solidified.

Description

Technical Field

[0001] This utility model relates to the field of pole and tower foundation technology, specifically to a power transmission line pole and tower foundation. Background Technology

[0002] Currently, the foundations for power transmission line towers mainly fall into two categories:

[0003] Form 1: A precast concrete foundation with embedded flange bases is constructed. A pit is dug at the construction site to bury the precast concrete foundation, which is then backfilled and compacted. The exposed flange bases are connected to the bottom of the tower via bolt sets.

[0004] Method Two: Dig a pit at the construction site, insert the bottom of the tower into the pit, and pour concrete directly into it. After solidification, it becomes the foundation.

[0005] Because the towers to be connected have different heights, weights, and load-bearing requirements, the precast concrete foundation in Form 1 cannot be flexibly adjusted to match the weight, while the cast-in-place method in Form 2 requires a large amount of concrete, resulting in a long curing time and extending the construction period.

[0006] Therefore, in order to solve the above problems, a new type of foundation for transmission line towers is proposed. Utility Model Content

[0007] The purpose of this utility model is to provide a power transmission line tower foundation that solves the problems mentioned in the background art through modular prefabrication and minimal casting operations.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a transmission line tower foundation, including a foundation platform, an extension platform stacked below the foundation platform, a first pouring channel vertically formed at the center of the foundation platform, and a second pouring channel vertically formed at the center of the extension platform; a flange base is fixedly installed at the center of the first pouring channel by a first steel reinforcement frame, and a connecting steel bar is fixedly installed inside the second pouring channel by a second steel reinforcement frame, the connecting steel bar being vertically arranged; the stacked foundation platform and extension platform form a stepped shape, the first pouring channel and the second pouring channel form a stepped hole, and connecting material is poured into the connected first pouring channel and second pouring channel.

[0009] Specifically, the base platform includes an integrally formed extension cylinder and a base. The extension cylinder is located above the base, and the distance h between the upper end face of the extension cylinder and the upper end face of the flange base is 15 cm to 20 cm.

[0010] Specifically, the first steel reinforcement frame includes longitudinal steel bars, first transverse steel bars and vertical steel bars. One end of the first transverse steel bar extends into the first pouring channel and is fixedly assembled with the flange base. The other end of the first transverse steel bar is embedded in the foundation platform and fixedly installed with longitudinal steel bars and vertical steel bars. The longitudinal steel bars, first transverse steel bars and vertical steel bars connected together are arranged perpendicularly to each other.

[0011] Specifically, the second steel reinforcement frame includes a second horizontal steel bar, an inner steel bar ring, and an outer steel bar ring. The inner steel bar ring is located in the second pouring channel and is fixedly assembled with the connecting steel bar. A portion of the second horizontal steel bar is embedded in the extension platform and fixedly installed with the outer steel bar ring. The end of the second horizontal steel bar that extends into the second pouring channel is fixedly assembled with the inner steel bar ring.

[0012] Furthermore, each inner steel bar ring has 3 to 6 connecting steel bars distributed in a circumferential manner, and the upper end of the connecting steel bar extends out of the second casting channel by a distance H, where H is 2.5 times the thickness of the expansion platform.

[0013] Furthermore, both the first and second horizontal reinforcing bars consist of 3 to 6 bars arranged in a circular pattern.

[0014] Specifically, the top of each expansion platform is integrally formed with a docking ring, and the bottom of both the platform base and the expansion platform are provided with docking grooves that match the docking ring.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] By using modular prefabrication and a small amount of on-site pouring, prefabricated components (foundation platform, extension platform) can be mass-produced in the workshop and selected as needed, significantly improving adaptability. In addition, the small amount of on-site concrete pouring significantly shortens the construction cycle. After the concrete solidifies, it can form a solid overall foundation, ensuring the strength of the foundation. Attached Figure Description

[0017] Figure 1 This is a schematic front view of the structure of this utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the structure of this utility model;

[0019] Figure 3 This is a schematic cross-sectional view of the structure of this utility model with the connector material removed;

[0020] Figure 4 This is a schematic cross-sectional view of the structure at the base of this utility model;

[0021] Figure 5 for Figure 1 A schematic cross-sectional view of the structure along the BB direction;

[0022] Figure 6This is a schematic cross-sectional view of the structure of the extension platform of this utility model;

[0023] Figure 7 for Figure 1 A schematic cross-sectional view of the structure along the AA direction.

[0024] In the diagram: 1 Flange base, 2 Foundation platform, 21 Extension cylinder, 22 Platform, 3 Extension platform, 4 Second steel reinforcement frame, 41 Second horizontal steel reinforcement, 42 Inner steel reinforcement ring, 43 Outer steel reinforcement ring, 5 Second pouring channel, 6 Butt ring, 7 Connecting steel reinforcement, 8 First steel reinforcement frame, 81 Longitudinal steel reinforcement, 82 First horizontal steel reinforcement, 83 Vertical steel reinforcement, 9 First pouring channel, 10 Connecting material. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Contents of the example:

[0027] Please see Figure 1 , Figure 2 and Figure 3 This utility model provides a transmission line tower foundation, including a foundation platform 2, an extension platform 3 stacked below the foundation platform 2, and an appropriate number of extension platforms 3 selected according to the height and weight of the tower. A first pouring channel 9 is opened in the center of the foundation platform 2 along the vertical direction, and a second pouring channel 5 is opened in the center of the extension platform 3 along the vertical direction.

[0028] At the center of the first pouring channel 9, a flange base 1 is fixedly installed by a first steel reinforcement frame 8. The first steel reinforcement frame 8 can be set in multiple layers to ensure the support strength of the flange base 1. The top of the flange base 1 has a flange hole, which can be connected to the bottom of the tower by bolt group connection.

[0029] Inside the second pouring channel 5, connecting steel bars 7 are fixedly installed by the second steel bar frame 4. The connecting steel bars 7 are set vertically. Since the thickness of the extension platform 3 is 10 cm to 15 cm, the second steel bar frame 4 only needs to be set in one or two layers to ensure the strength requirements of supporting the connecting steel bars 7.

[0030] The concrete in the precast components (foundation platform 2, extension platform 3) is usually C20-C30 high-strength concrete. Foundation platform 2 and the first steel reinforcement frame 8, and extension platform 3 and the second steel reinforcement frame 4 can form a solid component.

[0031] The stacked foundation platform 2 and extension platform 3 form a stepped shape. The first pouring channel 9 and the second pouring channel 5 form stepped holes. The connecting channel 9 and the second pouring channel 5 are filled with connecting material 10. The connecting material 10 can be C15 concrete with a ratio of cement (using 425 cement): sand: stone = 1:2.8:4. The connecting material 10 can fill the stepped holes. After compaction and solidification, it can fix the first steel frame 8 and the second steel frame 4 together, thereby connecting all the foundation platforms 2 and extension platforms 3 together. After backfilling and compaction, the overall stepped shape is conducive to stable placement and can withstand the force from the tower.

[0032] The aforementioned tower foundation structure enables modular prefabrication and shortens the construction cycle.

[0033] Please see Figure 4 The specific structure of base platform 2:

[0034] The base platform 2 includes an integrally formed extension cylinder 21 and a base 22. The extension cylinder 21 is located above the base 22. The distance between the upper end face of the extension cylinder 21 and the upper end face of the flange base 1 is h, and the value of h ranges from 15 cm to 20 cm. The extension cylinder 21 can ensure that the connection between the bottom of the tower and the flange base 1 is covered. After the connecting material 10 is poured, the bolt group can be covered, which can prevent the bolt group from being corroded by the environment and also enhance the connection strength at the connection.

[0035] The base 22 and the extension platform 3 are disc-shaped, which makes the force more even.

[0036] Please see Figure 5 The specific structure of the first steel reinforcement frame 8:

[0037] The first steel reinforcement frame 8 includes longitudinal steel bars 81, first transverse steel bars 82 and vertical steel bars 83. One end of the first transverse steel bar 82 extends into the first pouring channel 9 and is fixedly assembled with the flange base 1. The other end of the first transverse steel bar 82 is embedded in the foundation platform 2 and is fixedly installed with longitudinal steel bars 81 and vertical steel bars 83. The longitudinal steel bars 81, first transverse steel bars 82 and vertical steel bars 83 connected together are arranged perpendicularly to each other.

[0038] The three vertical longitudinal bars 81, the first horizontal bar 82, and the vertical bars 83 form a three-dimensional vertical structure, which ensures the connection strength between the flange base 1 and the foundation platform 2, and also improves the overall strength of the foundation platform 2.

[0039] Please see Figure 6 and Figure 7 The specific structure of the second steel reinforcement frame 4:

[0040] The second steel reinforcement frame 4 includes a second horizontal steel bar 41, an inner steel bar ring 42, and an outer steel bar ring 43. The inner steel bar ring 42 is located in the second pouring channel 5 and is fixedly assembled with the connecting steel bar 7. Part of the second horizontal steel bar 41 is embedded in the extension platform 3 and the outer steel bar ring 43 is fixedly installed thereon. The end of the second horizontal steel bar 41 that extends into the second pouring channel 5 is fixedly assembled with the inner steel bar ring 42.

[0041] Multiple outer steel reinforcement rings 43 can be set according to the size of the extension platform 3 to ensure the strength of the extension platform 3. Multiple connecting steel bars 7 can be flexibly set while ensuring verticality, and the positional accuracy is high.

[0042] For example, there are 3 to 6 connecting steel bars 7 on each inner steel bar ring 42, and the distance H from the upper end of the connecting steel bar 7 to the second pouring channel 5 is 2.5 times the thickness of the extension platform 3. After the foundation platform 2 and the extension platform 3 are stacked, the connecting steel bar 7 can extend into the upper pouring channel to ensure the anchoring effect of the connecting steel bar 7 in the connecting material 10.

[0043] The first horizontal reinforcing bar 82 and the second horizontal reinforcing bar 41 are both arranged in a circumferential pattern of 3 to 6, which further ensures the connection strength between the flange base 1 and the foundation platform 2, as well as the connection strength between the connecting reinforcing bar 7 and the extension platform 3.

[0044] To improve the precision and efficiency of stacked assembly:

[0045] The top of the expansion platform 3 is integrally formed with a docking ring 6, and the bottom of the base 22 and the expansion platform 3 are provided with docking grooves that match the docking ring 6. When stacked and assembled, the corresponding docking ring 6 and the docking groove are inserted and matched, which can facilitate the centering and placement of the base platform 2 and the expansion platform 3.

[0046] How the example works:

[0047] The foundation platform 2 and extension platform 3 can be prefabricated in the workshop. When needed for on-site construction, the corresponding number of foundation platforms 2 and the matching number of extension platforms 3 can be directly delivered. For towers with low load-bearing requirements, one foundation platform 2 is used, while for towers with high load-bearing requirements, an extension platform 3 is matched. For towers with even higher load-bearing requirements, more extension platforms 3 can be added, which improves the flexibility of prefabrication and ensures fast delivery.

[0048] At the construction site, a pit of suitable depth and width is dug out. The extension platform 3 and the foundation platform 2 are placed by stacking the mating ring 6 and the mating groove. The tower on the flange base 1 is connected by bolt group. The connecting material 10 is poured into the formed stepped hole. After the connecting material 10 solidifies, it can firmly connect the first steel frame 8, the second steel frame 4, and the connecting steel 7, thereby forming a complete whole between the foundation platform 2 and the extension platform 3. The amount of pouring is small and the solidification is faster.

[0049] Afterwards, the soil was backfilled and compacted to complete the construction of the tower foundation.

[0050] The cast-in-place connecting material 10 can also seal the connection between the flange base 1 and the tower, while increasing the connection strength.

[0051] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A foundation for a power transmission line tower, characterized by: Including base platform (2), the lower stack of the base platform (2) is placed with expansion platform (3), the center of the base platform (2) is opened along the vertical direction with first pouring channel (9), the center of the expansion platform (3) is opened along the vertical direction with second pouring channel (5); The center of the first pouring channel (9) is fixedly installed with flange base (1) through first reinforcing frame (8), the inside of the second pouring channel (5) is fixedly installed with connecting reinforcing bar (7) through second reinforcing frame (4), the connecting reinforcing bar (7) is vertically arranged; The stacked base platform (2) and expansion platform (3) form a stepped shape, the first pouring channel (9) and the second pouring channel (5) form a stepped hole, and the first pouring channel (9) and the second pouring channel (5) are communicated and poured with connecting material (10).

2. A foundation for a power transmission line tower according to claim 1, characterized in that: The base platform (2) includes integrally formed extension cylinder (21) and pedestal (22), the extension cylinder (21) is located above the pedestal (22), the distance between the upper end surface of the extension cylinder (21) and the upper end surface of the flange base (1) is h, and the value of h is in the range of 15cm to 20cm.

3. A foundation for a power transmission line tower according to claim 2, characterized in that: The first reinforcing frame (8) includes longitudinal reinforcing bar (81), first transverse reinforcing bar (82) and vertical reinforcing bar (83), one end of the first transverse reinforcing bar (82) extends into the first pouring channel (9) and is fixedly assembled with the flange base (1), the other end of the first transverse reinforcing bar (82) is embedded in the base platform (2) and fixedly installed with the longitudinal reinforcing bar (81) and the vertical reinforcing bar (83), and the longitudinal reinforcing bar (81), the first transverse reinforcing bar (82) and the vertical reinforcing bar (83) connected together are arranged vertically to each other.

4. A foundation for a power transmission line tower according to claim 3, characterized in that: The second reinforcing frame (4) includes second transverse reinforcing bar (41), inner reinforcing ring (42) and outer reinforcing ring (43), the inner reinforcing ring (42) is located in the second pouring channel (5) and is fixedly assembled with the connecting reinforcing bar (7), part of the second transverse reinforcing bar (41) is embedded in the expansion platform (3) and fixedly installed with the outer reinforcing ring (43), and the end of the second transverse reinforcing bar (41) extending into the second pouring channel (5) is fixedly assembled with the inner reinforcing ring (42).

5. A foundation for a power transmission line tower according to claim 4, characterized in that: The connecting reinforcing bar (7) on each inner reinforcing ring (42) is 3 to 6 in circumferential distribution, and the upper end of the connecting reinforcing bar (7) extends out of the second pouring channel (5) by a distance H, and H is 2.5 times the thickness of the expansion platform (3).

6. A foundation for a power transmission line tower according to claim 4, characterized in that: The first transverse reinforcing bar (82) and the second transverse reinforcing bar (41) are both 3 to 6 in circumferential distribution.

7. A foundation for a power transmission line tower according to claim 2, characterized in that: The top of the expansion platform (3) is integrally formed with a butt joint ring (6), and the bottom of the pedestal (22) and the expansion platform (3) is provided with a butt joint groove matched with the butt joint ring (6).

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