Power transmission line iron tower foundation

Abstract

The utility model relates to a power transmission line iron tower foundation, which belongs to the technical field of iron tower foundation application, and comprises a square beam and balancing weights which are arranged in a soil body, the balancing weights are arranged at four corners of the square beam, each balancing weight is provided with a tubular pile along the vertical direction, one part of the tubular pile penetrates through the balancing weights and is arranged in the soil body, and the other part of the tubular pile penetrates through the balancing weights. A part of the tubular piles extend out of the soil body; an annular wing plate is arranged on the portion, located in the balancing weight, of the tubular pile, the balancing weight is anchored to the tubular pile through the annular wing plate, a cap structure is arranged at the end, extending out of the soil body, of the tubular pile, and a reinforcing structure connected with the balancing weight is arranged at the intersection point of the two diagonal lines of the square beam. The balancing weight is anchored with the pipe pile through the annular wing plate, the horizontal bearing capacity of the single pipe pile can be effectively improved through the soil pressure of the soil body, the vertical uplift bearing capacity of the single pipe pile can be increased through the dead weight of the balancing weight, and the vertical uplift bearing capacity of the single pipe pile can be improved. Therefore, the balancing weights and the tubular piles are arranged at the four corners of the square beam, so that the vertical pulling resistance and the horizontal bearing capacity of the iron tower foundation can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of the application of iron tower foundations, and particularly relates to a transmission line iron tower foundation. Background Art

[0002] The function of a transmission line iron tower foundation is to stabilize the tower body and prevent the iron tower from being damaged by uplift, downpressure, overturning and sliding due to the self-weight of the tower body, wind load, earthquake load, and loads such as wind, ice hanging, and broken wire tension transmitted by the conductor. The selection, design and construction of the iron tower foundation have an important impact on the normal use of the entire transmission line project. At present, the main forms of iron tower foundations are: rock foundations, precast concrete pile foundations, steel pipe pile foundations, composite caisson foundations, independent foundations, combined foundations, and so on.

[0003] With the extensive development of the West-East Power Transmission Project, various types of transmission line iron tower foundations have been widely applied and promoted. Due to the variability of geological conditions in the central and western regions, the construction of transmission line iron tower foundations often crosses desert areas. The sandy soil in desert areas has relatively strong bearing capacity itself, but poor cohesion, which is very unfavorable for the uplift and horizontal bearing capacity of pile foundations.

[0004] For geological conditions such as sandy soil, silt, and silty clay where piling is possible, how to improve the vertical uplift and horizontal bearing capacity of the iron tower foundation is an urgent problem to be solved. Content of the Utility Model

[0005] In view of the above problems, the utility model provides a transmission line iron tower foundation, which includes a square beam and counterweight blocks arranged in the soil. Counterweight blocks are provided at the four corners of the square beam. Each counterweight block is provided with a pipe pile vertically. Part of the pipe piles penetrate through the counterweight blocks and are arranged in the soil, and part of the pipe piles extend out of the soil; a ring wing plate is provided at the part of the pipe pile located in the counterweight block. The counterweight block is anchored to the pipe pile through the ring wing plate. A cap structure is provided at one end of the pipe pile extending out of the soil. A strengthening structure connected to the counterweight block is provided at the intersection of the two diagonals of the square beam.

[0006] Further, adjacent pipe piles and the strengthening structure form a triangle.

[0007] Further, ring wing stiffening plates are provided on the ring wing plate. The ring wing stiffening plates are perpendicular to the ring wing plate, and the side of the ring wing stiffening plate close to the pipe pile is connected to the pipe pile.

[0008] Further, ring wing stiffening plates are arranged on both sides in the vertical direction of the ring wing plate.

[0009] Furthermore, the strengthening structure includes a balance block disposed at the intersection of the two diagonals of the square beam. The balance block is arranged within the soil body. An intensifying pile is provided within the balance block. An anchor plate is provided at the part of the intensifying pile located within the balance block. The balance block is anchored to the intensifying pile through the anchor plate. A strengthening beam connected to the counterweight is provided on the balance block.

[0010] Furthermore, a sealing plate is provided at one end of the intensifying pile located within the balance block.

[0011] Furthermore, reinforcement plates are provided on both sides in the vertical direction of the anchor plate.

[0012] Furthermore, the strengthening beam includes a first connecting beam and a second connecting beam. The first connecting beam and the second connecting beam are arranged crosswise. A balance block is provided at the intersection of the first connecting beam and the second connecting beam. One ends of the first connecting beam and the second connecting beam away from the balance block are both connected to the counterweight.

[0013] Furthermore, the strengthening structure, the square beam, and the counterweight are all located on the same horizontal line.

[0014] Furthermore, the cap structure includes a pile cap plate. The pile cap plate is arranged at one end of the pipe pile extending out of the soil body. Pile cap stiffening plates are provided on the pile cap plate. The pile cap stiffening plates are perpendicularly connected to the pile cap plate. One side of the pile cap stiffening plate close to the pipe pile is connected to the pipe pile.

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

[0016] 1) In the present utility model, the counterweight is anchored to the pipe pile through the ring wing plate. Coupled with the soil pressure of the soil body, the horizontal bearing capacity of a single pipe pile can be effectively improved. The self-weight of the counterweight can increase the vertical uplift bearing capacity of a single pipe pile. Therefore, the counterweights at the four corners of the square beam and the pipe piles can improve the vertical uplift and horizontal bearing capacities of the entire iron tower foundation.

[0017] 2) The connection among the strengthening structure, the counterweight, and the pipe pile in the present utility model can form an integral and stable force-bearing structure, enhancing the overall bearing capacity of the foundation.

[0018] 3) The strengthening structure in the present utility model can jointly share the horizontal load.

[0019] 4) The bearing capacity of a single pipe pile in the present utility model can be improved by relying on the contact area between the counterweight and the soil body.

[0020] 5) The iron tower foundation designed by using the pipe pile, the counterweight, and the square beam in the present utility model avoids the increase in the construction volume caused by large-scale excavation of the foundation and also avoids the increase in the cost of reinforced concrete caused by using independent concrete foundations.

[0021] 6) The structure of the utility model is simple, with strong applicability, small construction floor area and low construction cost.

[0022] Other features and advantages of the utility model will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the utility model. The objectives and other advantages of the utility model can be achieved and obtained through the structure pointed out in the specification, claims and drawings. Brief Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 Shows the structural schematic diagram of the embodiment of the present utility model;

[0025] Figure 2 Shows the connection schematic diagram of adjacent pipe piles;

[0026] Figure 3 Shows the connection schematic diagram of the strengthening structure and adjacent pipe piles;

[0027] Figure 4 Shows the connection schematic diagram of the ring wing plate and the ring wing stiffening plate;

[0028] Figure 5 Shows Figure 4 The top view of;

[0029] Figure 6 Shows the structural schematic diagram of the ring wing stiffening plate;

[0030] Figure 7 Shows the structural schematic diagram of the pile cap plate;

[0031] Figure 8 Shows Figure 7 The top view of;

[0032] Figure 9 Shows the structural schematic diagram of the pile cap stiffening plate;

[0033] Figure 10 Shows the connection schematic diagram of the strengthening pile and the sealing plate.

[0034] Reference numerals: 1, square beam; 2, counterweight; 3, pipe pile; 31, ring wing plate; 311, vibration hole; 32, ring wing stiffening plate; 33, pile cap stiffening plate; 34, pile cap plate; 341, bolt hole; 4, balance weight; 5, strengthening pile; 51, anchoring plate; 52, reinforcement plate; 53, sealing plate; 6, strengthening beam; 61, first connecting beam; 62, second connecting beam; 7, soil body. Detailed implementation manners

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0036] Figure 1 The structural schematic diagram of the embodiment of the present utility model is shown. As Figure 1 shown, a transmission line tower foundation includes a square beam 1 and a counterweight 2 provided in a soil body 7. Counterweights 2 are provided at the four corners of the square beam 1. Figure 2 The connection schematic diagram of adjacent pipe piles 3 is shown; as Figure 2 shown, each counterweight 2 is provided with a pipe pile 3 vertically. A part of the pipe piles 3 penetrate through the counterweight 2 and are arranged in the soil body 7, and a part of the pipe piles 3 extend out of the soil body 7; a ring wing plate 31 is provided at the part of the pipe pile 3 located in the counterweight 2. The counterweight 2 is anchored to the pipe pile 3 through the ring wing plate 31. A cap structure is provided at one end of the pipe pile 3 extending out of the soil body 7. A strengthening structure connected to the counterweight 2 is provided at the intersection of the two diagonals of the square beam 1.

[0037] The transmission line tower foundation utilizes the counterweight 2, the ring wing plate 31, the pipe pile 3, the square beam 1, and the strengthening structure, which can not only effectively improve the horizontal bearing capacity of a single pipe pile 3, but also increase the vertical uplift bearing capacity of a single pipe pile 3, thereby improving the vertical uplift and horizontal bearing capacities of the entire tower foundation.

[0038] Specifically, since there are counterweights 2 at the four corners of the square beam 1, there are four pipe piles 3. The four pipe piles 3 are used to support the tower column feet. In the specific implementation process, the vertical uplift, compression and horizontal bearing capacities of the pipe piles 3 can be adjusted by adjusting the pile diameter and burial depth of the pipe piles 3.

[0039] In some embodiments, the adjacent pipe piles 3 and the strengthening structure form a triangle; two adjacent pipe piles 3 and the strengthening structure form a triangle, which can make the tower foundation form a stable structure, so that the pipe piles 3 in the counterweight 2 and the strengthening structure form an integral body.

[0040] Figure 4 The connection schematic diagram of the ring wing plate 31 and the ring wing stiffening plate 32 is shown. As Figure 4 shown, in some embodiments, the ring wing stiffening plate 32 is provided on the ring wing plate 31, the ring wing stiffening plate 32 is perpendicular to the ring wing plate 31, and the side of the ring wing stiffening plate 32 close to the pipe pile 3 is connected to the pipe pile 3; one side of the ring wing stiffening plate 32 is perpendicularly connected to the ring wing plate 31, and the adjacent side is connected to the pipe pile 3, which can strengthen and fix the ring wing plate 31.

[0041] Figure 6 The structural schematic diagram of the ring wing stiffening plate 32 is shown. As Figure 6 shown, in some embodiments, four ring wing stiffening plates 32 are evenly distributed on the ring wing plate 31; the four ring wing stiffening plates 32 can better strengthen and fix the ring wing plate 31, so as to improve the horizontal bearing capacity of a single pipe pile 3.

[0042] Figure 5 The top view of Figure 4 is shown. As Figure 5 shown, in some embodiments, the ring wing plate 31 is provided with vibration holes 311; the vibration holes 311 can ensure that the concrete under the ring wing plate 31 is vibrated and compacted, ensure the preset self-weight of the counterweight 2, and thus increase the vertical uplift bearing capacity of the pipe pile 3.

[0043] In some embodiments, the ring wing stiffening plates 32 are arranged on both sides of the ring wing plate 31 in the vertical direction; there are ring wing stiffening plates 32 on both sides of the ring wing plate 31, which can strengthen and fix the ring wing plate 31, so as to ensure the stability of the counterweight 2.

[0044] Figure 3 The connection schematic diagram of the strengthening structure and the adjacent pipe pile 3 is shown. As Figure 3 shown, in some embodiments, the strengthening structure includes a balance block 4 arranged at the intersection of the two diagonals of the square beam 1, the balance block 4 is arranged in the soil body 7, a strengthening pile 5 is arranged in the balance block 4, an anchor plate 51 is arranged at the part of the strengthening pile 5 located in the balance block 4, the balance block 4 is anchored to the strengthening pile 5 through the anchor plate 51, and a strengthening beam 6 connected to the counterweight 2 is arranged on the balance block 4; the anchor plate 51 is used to connect the strengthening pile 5 and the balance block 4; the strengthening beam 6 is used to connect the counterweight 2 and the balance block 4, so that the strengthening piles 5 share the horizontal load together.

[0045] Specifically, the self-weights of the balance block 4 and the counterweight block 2 are the same, which can ensure that the entire tower foundation can form an integral and stable stress structure, providing conditions for jointly sharing the horizontal load.

[0046] In some embodiments, the adjacent pipe piles 3 and the strengthening piles 5 form a triangle; the adjacent two pipe piles 3 and the strengthening piles 5 form a triangle, which can make the tower foundation form a stable structure, so that the pipe piles 3 and the strengthening piles 5 in the counterweight block 2 form an integral body; because there is a counterweight block 2 on the pipe pile 3 and a balance block 4 on the strengthening pile 5, the stability of the pipe pile 3 and the strengthening pile 5 can be increased under the self-weights of the counterweight block 2 and the balance block 4.

[0047] In some embodiments, the structure of the anchor plate 51 is the same as that of the ring wing plate 31, so there are also vibrating holes 311 on the anchor plate 51, which not only ensures the vibrating compaction of the concrete poured under the anchor plate 51, but also ensures the preset self-weight of the balance block 4, thereby increasing the vertical uplift bearing capacity of the strengthening pile 5.

[0048] Figure 10 The connection schematic diagram of the strengthening pile 5 and the sealing plate 53 is shown. As Figure 10 shown, in some embodiments, one end of the strengthening pile 5 located inside the balance block 4 is provided with a sealing plate 53; after the pouring in the strengthening pile 5 is completed, the strengthening pile 5 is closed by using the sealing plate 53.

[0049] In some embodiments, one end of the strengthening pile 5 located inside the balance block 4 is provided with a sealing plate 53; there are reinforcing plates 52 on both sides of the anchor plate 51, which can strengthen and fix the anchor plate 51, thereby ensuring the stability of the balance block 4.

[0050] In some embodiments, four reinforcing plates 52 are evenly distributed on the anchor plate 51; the four reinforcing plates 52 can better strengthen and fix the anchor plate 51, thereby increasing the horizontal bearing capacity of the strengthening pile 5.

[0051] In some embodiments, the strengthening beam 6 includes a first connecting beam 61 and a second connecting beam 62. The first connecting beam 61 and the second connecting beam 62 are arranged crosswise. A balance block 4 is provided at the intersection of the first connecting beam 61 and the second connecting beam 62. One ends of the first connecting beam 61 and the second connecting beam 62 away from the balance block 4 are both connected to the counterweight 2. The balance block 4 is connected to the square beam 1 by means of the first connecting beam 61 and the second connecting beam 62, which can make the entire tower foundation form a stable stress structure and increase the overall bearing capacity of the tower foundation. Counterweights 2 are provided at the four corners of the square beam 1. Both ends of the first connecting beam and the second connecting beam are connected to the counterweight 2. The counterweight 2 is arranged on the pipe pile 3, and the balance block 4 is arranged on the strengthening pile 5. Therefore, the strengthening pile 5 can form a whole with the pipe pile 3, improve the lateral stiffness of the foundation, reduce the horizontal displacement or horizontal rheology of the foundation, greatly improve the overall bearing capacity of the pile foundation, make the vertical deformation more uniform, and avoid the foundation failure caused by uneven deformation.

[0052] Specifically, both the counterweight 2 and the balance block 4 are arranged in the soil body 7.

[0053] In some embodiments, the square beam 1 is square. Counterweights 2 are arranged at the four corners of the square square beam 1, which can increase the vertical uplift bearing capacity of a single pipe pile 3.

[0054] In some embodiments, the strengthening structure, the square beam 1, and the counterweight 2 are all on the same horizontal line, which can ensure the balance relationship between the strengthening structure, the square beam 1, and the counterweight 2, enable the strengthening structure to jointly share the horizontal load, and enhance the overall bearing capacity of the foundation.

[0055] Figure 7 The structural schematic diagram of the pile cap plate 34 is shown; as Figure 7 shown, in some embodiments, the cap structure includes a pile cap plate 34, and the pile cap plate 34 is arranged at one end of the pipe pile 3 extending out of the soil body 7. Figure 9 The structural schematic diagram of the pile cap stiffening plate 33 is shown; as Figure 9 shown, a pile cap stiffening plate 33 is provided on the pile cap plate 34. The pile cap stiffening plate 33 is perpendicularly connected to the pile cap plate 34. One side of the pile cap stiffening plate 33 close to the pipe pile 3 is connected to the pipe pile 3. The pile cap stiffening plate 33 is used to strengthen and fix the pile cap plate 34. The pile cap plate 34 can bear the upper load of the tower under the strengthening and fixing of the pile cap stiffening plate 33 and transfer the load to the pipe pile 3. The connection of both the pile cap plate 34 and the pile cap stiffening plate 33 to the pipe pile 3 can strengthen and fix the pile cap plate 34.

[0056] Specifically, the shapes of the balance block 4 and the counterweight 2 can be selected but are not limited to cylindrical shapes. The cylindrical balance block 4 and counterweight 2 can effectively improve the horizontal bearing capacity of a single pipe column under the soil pressure of the soil body 7.

[0057] Specifically, the shapes of the anchor plate 51, the ring wing plate 31, the pile cap plate 34, and the sealing plate 53 are optional but not limited to circular; the circular anchor plate 51 and the sealing plate 53 can be quickly adapted to the cylindrical balance block 4, and the circular ring wing plate 31 and the pile cap plate 34 can be quickly adapted to the cylindrical counterweight 2, so as to improve the vertical uplift and horizontal bearing capacity of the entire tower foundation and make the tower foundation form a stable structure.

[0058] Specifically, the materials of the pipe pile 3, the strengthening pile 5, the ring wing plate 31, the ring wing stiffening plate 32, and the reinforcing plate 52 are optional but not limited to steel; compared with other types of foundations, the pipe pile 3 and the strengthening pile 5 made of steel have advantages in terms of material properties, self-weight, bearing capacity, flexibility, etc.

[0059] Figure 8 shows Figure 7 the top view of. As Figure 8 shown, in some embodiments, bolt holes 341 are provided on the pile cap plate 34; the pile cap plate 34 and the tower column base are bolted through the bolt holes 341, so that the load on the tower is transmitted to the pipe pile 3 through the pile cap plate 34.

[0060] The working principle of the transmission line tower foundation is as follows:

[0061] By increasing the horizontal bearing and vertical uplift bearing capacity of a single pipe pile 3 and sharing the horizontal load, the vertical uplift and horizontal bearing capacity of the tower foundation are improved. Among them, the ring wing plate 31 and the ring wing stiffening plate 32 are successively welded on the four pipe piles 3, and then the anchor plate 51 and the reinforcing plate 52 are welded on the strengthening pile 5, and then the sealing plate 53 is welded at the end of the strengthening pile 5. On this basis, the strengthening beam 6, the counterweight 2, the square beam 1 and the balance block 4 are poured. The counterweight 2 is anchored on the pipe pile 3 through the ring wing plate 31 and the ring wing stiffening plate 32, and the balance block 4 is anchored on the reinforcing pile through the anchor plate 51 and the reinforcing plate 52. The welded tower foundation is buried according to the preset target depth, and then the soil body 7 is backfilled and compacted. The pile cap plate 34 and the pile cap stiffening plate 33 are welded to the end of the pipe pile 3 above the compacted soil body 7 to form a tower foundation. Since the counterweight 2 in the tower foundation is anchored to the pipe pile 3 through the ring wing plate 31 and the earth pressure of the soil body 7, the horizontal bearing capacity of a single pipe pile 3 can be effectively improved, and the self-weight of the counterweight 2 can increase the vertical uplift bearing capacity of a single pipe pile 3. Therefore, there are counterweights 2 and pipe piles 3 at the four corners of the square beam 1, which can improve the vertical uplift and horizontal bearing capacity of the entire tower foundation. The strengthening structure can jointly share the horizontal load, making the tower foundation form an integral and stable stress structure and enhancing the overall bearing capacity of the foundation.

[0062] Specifically, the pipe pile 3 can be divided into two parts. One part is buried after anchoring the counterweight 2, and the other part is welded with the pile cap plate 34 and the pile cap stiffening plate 33 in advance. After subsequent burial, they are spliced by strong welds.

[0063] The inconvenience of in-situ welding is avoided.

[0064] Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A transmission line tower foundation, characterized in that: The invention comprises a square beam (1) and a counterweight (2) arranged in a soil body (7), wherein the counterweight (2) is arranged at each of the four corners of the square beam (1), and each of the counterweights (2) is provided with a pipe pile (3) in the vertical direction, a part of the pipe pile (3) passes through the counterweight (2) and is arranged in the soil body (7), and a part of the pipe pile (3) extends out of the soil body (7) and is arranged; a ring wing plate (31) is provided at the part of the pipe pile (3) located in the counterweight (2), the counterweight (2) is anchored to the pipe pile (3) through the ring wing plate (31), a cap structure is provided at one end of the pipe pile (3) extending out of the soil body (7), and a reinforcing structure connected to the counterweight (2) is provided at the intersection of two diagonals of the square beam (1).

2. The transmission line tower foundation according to claim 1, characterized in that: The adjacent pipe piles (3) and the reinforcement structure form a triangle.

3. The transmission line tower foundation according to claim 1, characterized in that: A ring wing stiffening plate (32) is provided on the ring wing plate (31), the ring wing stiffening plate (32) is perpendicular to the ring wing plate (31), and the side of the ring wing stiffening plate (32) close to the pipe pile (3) is connected to the pipe pile (3).

4. The transmission line tower foundation according to claim 3, characterized in that: Ring wing stiffening plates (32) are arranged on both sides of the ring wing plate (31) in the vertical direction.

5. The transmission line tower foundation according to claim 1, characterized in that: The reinforcement structure comprises a balancing block (4) arranged at the intersection of two diagonals of a square beam (1); the balancing block (4) is arranged in a soil body (7); a reinforcement pile (5) is arranged in the balancing block (4); an anchor plate (51) is arranged at a position of the reinforcement pile (5) located in the balancing block (4); the balancing block (4) is anchored to the reinforcement pile (5) via the anchor plate (51); and a reinforcement beam (6) connected to a counterweight (2) is arranged on the balancing block (4).

6. The transmission line tower foundation according to claim 5, characterized in that: A sealing plate (53) is provided at one end of the reinforcement pile (5) located inside the balancing block (4).

7. The transmission line tower foundation according to claim 5, characterized in that: Reinforcement plates (52) are provided on both sides of the anchoring plate (51) in the vertical direction.

8. The transmission line tower foundation according to any one of claims 5 to 7, characterized in that: The reinforcing beam (6) comprises a first connecting beam (61) and a second connecting beam (62); the first connecting beam (61) and the second connecting beam (62) are arranged crosswise; a balancing block (4) is arranged at the intersection of the first connecting beam (61) and the second connecting beam (62); and the ends of the first connecting beam (61) and the second connecting beam (62) away from the balancing block (4) are both connected to a counterweight block (2).

9. The transmission line tower foundation according to any one of claims 1 to 4, characterized in that: The reinforcement structure, the square beam (1) and the counterweight block (2) are all located on the same horizontal line.

10. The transmission line tower foundation according to any one of claims 1 to 4, characterized in that: The cap structure comprises a pile cap plate (34), the pile cap plate (34) being arranged at one end of the pipe pile (3) extending out of the soil (7), the pile cap plate (34) being provided with a pile cap stiffening plate (33), the pile cap stiffening plate (33) being vertically connected to the pile cap plate (34), and the pile cap stiffening plate (33) being connected to the pipe pile (3) at a side close to the pipe pile (3).

Images