Connecting structure of steel pier and single concrete pile foundation

Abstract

The utility model discloses a connecting structure of a steel pier and a single concrete pile foundation, and aims to provide a connecting structure which is simple and convenient to construct, can shorten the construction period and reduce the excavation range so as to adapt to construction under a limited space condition; the connecting structure of the steel pier and the single concrete pile foundation is simple in structure and high in reliability. A plurality of longitudinal steel bars are annularly arranged in the concrete pile foundation, and the upper ends of the longitudinal steel bars extend to the position above the concrete pile foundation and form outwards-extending longitudinal bars above the concrete pile foundation. A plurality of layers of reinforcing meshes which are sequentially stacked from bottom to top are arranged between the steel pier and the concrete pile foundation; the lower end of the steel casing, the lower end of the steel pier and the upper end of the concrete pile foundation extend into the steel casing, the overhanging longitudinal bars are distributed between the steel casing and the steel pier, and gaps among the steel casing, the steel pier and the concrete pile foundation are filled with concrete in the casing.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering technology, specifically to a connection structure between a steel bridge pier and a single concrete pile foundation. Background Technology

[0002] Traditional steel pier and pile foundation connections require a pier cap, beneath which multiple small-diameter concrete piles are typically laid. This current method of connection results in longer construction time, higher costs, and requires more space. While this method was widely used in the past, with urban development, it now necessitates construction near existing bridge piers and other structures, requiring work within limited space to achieve the same results.

[0003] In view of this, providing a steel bridge pier and single concrete pile foundation connection structure that is simple and convenient to construct, has a short construction period, a small excavation range, and high reliability has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this utility model is to provide a steel bridge pier and single concrete pile foundation connection structure that is not only simple and convenient to construct, shortens the construction period, and reduces the excavation range to adapt to construction under limited space conditions, but also has high reliability.

[0005] The technical solution of this utility model is:

[0006] A connection structure between a steel bridge pier and a single concrete pile foundation, characterized in that it includes:

[0007] A concrete pile foundation has several longitudinal steel bars arranged in a ring inside, with the upper ends of the longitudinal steel bars extending above the concrete pile foundation to form outward longitudinal bars above the concrete pile foundation.

[0008] The steel piers located above the concrete pile foundations have several layers of steel mesh stacked from bottom to top between them and the concrete pile foundations.

[0009] The steel casing is used, with the lower end of the steel pier and the upper end of the concrete pile foundation both extending into it. Extended longitudinal reinforcement bars are distributed between the steel casing and the steel pier. The gaps between the steel casing, the steel pier, and the concrete pile foundation are filled with concrete from within the casing. Compared to traditional steel pier and pile foundation connections, which require a foundation cap and multiple small-diameter concrete piles for support, this design eliminates the foundation cap structure and uses only a single concrete pile foundation. This simplifies construction, shortens the construction period, and reduces the excavation area of ​​the concrete pile foundation, making it suitable for construction in confined spaces. Furthermore, this design connects the steel casing, steel pier, and concrete pile foundation into a unified whole through the concrete and the extended longitudinal reinforcement bars above the concrete pile foundation. The three components work together reliably.

[0010] Preferably, the steel casing is cylindrical, with a diameter 20-40cm larger than the concrete pile diameter, and a height greater than the pile diameter. The upper end of the extended longitudinal reinforcement bars is lower than the top of the steel casing. An excessively large steel casing diameter would compromise the reliability of the connection between the steel casing, steel pier, and concrete pile. Furthermore, an excessively large diameter would increase manufacturing costs and weight, making hoisting more difficult. Therefore, this design sets the steel casing diameter to be 20-40cm larger than the concrete pile diameter. This ensures a reliable connection between the steel casing, steel pier, and concrete pile while avoiding the increased manufacturing costs and hoisting difficulties associated with an excessively large diameter. Conversely, an excessively small steel casing height would also compromise the reliability of the connection between the steel casing, steel pier, and concrete pile. Therefore, this scheme sets the height of the steel casing to be greater than the diameter of the pile foundation, and the upper end of the extended longitudinal reinforcement is lower than the upper end of the steel casing. This ensures high reliability of the connection between the steel casing, the steel pier and the concrete pile foundation.

[0011] Preferably, the inner wall of the steel casing is provided with a shear-resistant structure, which includes a protruding steel structure welded to the inner wall of the steel casing. This can further improve the reliability of the connection between the steel casing, the steel pier, and the concrete pile foundation, and improve the shear resistance of the connection structure between the steel pier and the single concrete pile foundation.

[0012] Preferably, the steel bridge pier comprises a steel pipe, into which concrete is poured to fill the inner cavity. Thus, when hoisting the steel bridge pier, only the steel pipe needs to be hoisted, greatly reducing the weight of the pier and facilitating the actual hoisting process. After the steel pipe is hoisted, the inner cavity is filled with concrete, ensuring the structural strength and stability of the steel bridge pier.

[0013] Preferably, several internal studs are distributed from top to bottom on the inner wall of the steel pipe, and these studs are welded to the inner wall of the steel pipe. In this way, on the one hand, the connection between the concrete inside the steel pipe and the steel pipe can be strengthened; on the other hand, the shear resistance of the steel bridge pier can be improved by the cooperation between the internal studs and the concrete inside the steel pipe.

[0014] Preferably, a ring-shaped steel plate is welded to the lower end of the steel pipe, with the ring-shaped steel plate perpendicular to the axis of the steel pipe. This allows the ring-shaped steel plate to be cast inside the concrete casing of the steel casing, further improving the reliability of the connection between the steel casing, the steel pier, and the concrete pile foundation.

[0015] Preferably, the bottom of the outer wall of the steel pier is provided with a shear-resistant structure. This shear-resistant structure includes several side steel plates arranged circumferentially on the outer side of the steel pier. The side steel plates are welded to the outer wall of the steel pier, and are vertically distributed, extending along the pier's length. This shear-resistant structure further improves the reliability of the connection between the steel casing, the steel pier, and the concrete pile foundation; it also further enhances the shear resistance of the connection structure between the steel pier and the individual concrete pile foundation.

[0016] Preferably, the shear-resistant structure of the pier also includes several ring-shaped reinforcing bars distributed sequentially from bottom to top. Each steel plate has several reinforcing bar through-holes corresponding to the ring-shaped reinforcing bars, which pass through the corresponding through-holes on each steel plate and surround the outside of the steel pier. In this way, on the one hand, the reliability of the connection between the steel casing, the steel pier, and the concrete pile foundation can be further improved; on the other hand, the shear resistance of the connection structure between the steel pier and the single concrete pile foundation can be further improved.

[0017] Preferably, several pile-top annular stirrups are also provided above the concrete pile foundation, arranged sequentially from bottom to top. These annular stirrups are arranged around each of the extended longitudinal reinforcement bars and are located between the steel casing and the steel pier. This further improves the reliability of the connection between the steel casing, the steel pier, and the concrete pile foundation.

[0018] Preferably, the concrete pile foundation is also provided with a number of pile foundation annular stirrups distributed sequentially from bottom to top, and the pile foundation annular stirrups are arranged around each longitudinal steel bar.

[0019] The advantages of this utility model are: it is not only simple and convenient to construct, but also can shorten the construction period and reduce the excavation range to adapt to construction under limited space conditions; moreover, the connection structure between the steel bridge pier and the single concrete pile foundation has high reliability. Attached Figure Description

[0020] Figure 1 This is a schematic cross-sectional view of a steel bridge pier and a single concrete pile foundation connection structure according to the present invention, taken along the central axis of the concrete pile foundation.

[0021] Figure 2 This is a schematic diagram of a connection structure between a steel bridge pier and a single concrete pile foundation according to this utility model.

[0022] Figure 3 This is a schematic cross-sectional view of a connection structure between a steel bridge pier and a single concrete pile foundation according to this utility model.

[0023] Figure 4 This is a schematic diagram of a steel mesh structure for connecting a steel bridge pier to a single concrete pile foundation, according to this utility model.

[0024] In the picture:

[0025] Concrete pile foundation 1, longitudinal reinforcement 1.1, outward longitudinal reinforcement 1.2, pile top annular stirrup 1.3, pile foundation annular stirrup 1.4;

[0026] 2. Steel casing; 2.1 Shear-resistant structure of the casing;

[0027] 3. Steel pier, 3.1. Steel pipe, 3.2. Concrete inside the pipe, 3.3. Studs inside the pipe, 3.4. Shear structure of the pier, 3.41. Side steel plate, 3.42. Ring reinforcement, 3.5.

[0028] 4 steel mesh panels;

[0029] 5. Concrete inside the cylinder. Detailed Implementation

[0030] Specific Implementation Example 1, such as Figures 1-4 As shown, a connection structure between a steel bridge pier and a single concrete pile foundation includes a steel bridge pier 3, a steel casing 2, and a single concrete pile foundation 1.

[0031] The concrete pile foundation 1 contains several circumferentially arranged longitudinal steel bars 1.1, which extend from bottom to top along the concrete pile foundation 1. The upper ends of the longitudinal steel bars 1.1 extend upwards above the concrete pile foundation 1 and form overhanging longitudinal bars 1.2 above the concrete pile foundation 1. The overhanging longitudinal bars 1.2 are arranged in a circumferential manner.

[0032] The steel pier 3 is located above the concrete pile foundation 1. Several layers of steel mesh 4 are stacked sequentially from bottom to top between the steel pier 3 and the concrete pile foundation 1. The steel mesh 4 can diffuse the local pressure transmitted by the steel pier 3. In this embodiment, the number of steel mesh 4 layers is 2-6, for example, three layers or four layers stacked sequentially from bottom to top.

[0033] The lower end of the steel pier 3 and the upper end of the concrete pile foundation 1 both extend into the steel casing 2. Specifically, the upper end of the concrete pile foundation 1 extends upwards from the lower end of the steel pier 3 into the steel casing 2, and the lower end of the steel pier 3 extends downwards from the upper end of the steel pier 3 into the steel casing 2. In this embodiment, the centers of the steel pier 3, the concrete pile foundation 1, and the steel casing 2 are aligned. Extending longitudinal reinforcement bars 1.2 are distributed between the steel casing 2 and the steel pier 3. The gap between the steel casing 2, the steel pier 3, and the concrete pile foundation 1 is filled with concrete 5, thus connecting the steel casing 2, the steel pier 3, and the concrete pile foundation 1 into a single unit.

[0034] Compared to the traditional connection between steel pier 3 and pile foundation, which requires a pile cap and multiple small-diameter concrete piles 1 for support, this embodiment of the steel pier and single concrete pile connection structure eliminates the pile cap structure and uses only one concrete pile 1. Therefore, construction is simple and convenient, effectively shortening the construction period and reducing the excavation area of ​​the concrete pile 1, thus adapting to construction under limited space conditions. Furthermore, this embodiment of the steel pier and single concrete pile connection structure connects the steel casing 2, steel pier 3, and concrete pile 1 into a whole through concrete and the extended longitudinal reinforcement 1.2 above the concrete pile 1. The three components cooperate with each other, resulting in high connection reliability.

[0035] Specific embodiment two, such as Figures 1-4 As shown, a connection structure between a steel bridge pier and a single concrete pile foundation includes a steel bridge pier 3, a steel casing 2, and a single concrete pile foundation 1.

[0036] The concrete pile foundation 1 contains several circumferentially arranged longitudinal steel bars 1.1, which extend from bottom to top along the concrete pile foundation 1. The upper ends of the longitudinal steel bars 1.1 extend upwards above the concrete pile foundation 1 and form overhanging longitudinal bars 1.2 above the concrete pile foundation 1. The overhanging longitudinal bars 1.2 are arranged in a circumferential manner.

[0037] The steel pier 3 is located above the concrete pile foundation 1. Several layers of steel mesh 4 are stacked sequentially from bottom to top between the steel pier 3 and the concrete pile foundation 1. The steel mesh 4 can diffuse the local pressure transmitted by the steel pier 3. In this embodiment, the number of steel mesh 4 layers is 2-6, for example, three layers or four layers stacked sequentially from bottom to top.

[0038] The lower end of the steel pier 3 and the upper end of the concrete pile foundation 1 both extend into the steel casing 2. Specifically, the upper end of the concrete pile foundation 1 extends upwards from the lower port of the steel pier 3 into the steel casing 2, and the lower end of the steel pier 3 extends downwards from the upper port of the steel pier 3 into the steel casing 2. In this embodiment, the centers of the steel pier 3, the concrete pile foundation 1, and the steel casing 2 are aligned. Extending longitudinal reinforcement bars 1.2 are distributed between the steel casing 2 and the steel pier 3. The gaps between the steel casing 2, the steel pier 3, and the concrete pile foundation 1 are filled with in-casing concrete 5 (i.e., the gaps between the steel casing 2 and the steel pier 3, and between the steel casing 2 and the concrete pile foundation 1, are filled with in-casing concrete 5, thus filling the gaps between the steel casing 2 and the steel pier 3, and between the steel casing 2 and the concrete pile foundation 1). In this embodiment, the steel pier 3 includes a steel pipe 3.1, and concrete 3.2 is poured into the steel pipe 3.1 to fill the inner cavity of the steel pipe 3.1.

[0039] Compared to the traditional connection between steel pier 3 and pile foundation, which requires a pile cap and multiple small-diameter concrete piles 1 for support, this embodiment of the steel pier and single concrete pile connection structure eliminates the pile cap structure and uses only one concrete pile 1. Therefore, construction is simple and convenient, effectively shortening the construction period and reducing the excavation area of ​​the concrete pile 1, thus adapting to construction under limited space conditions. Furthermore, this embodiment of the steel pier and single concrete pile connection structure connects the steel casing 2, steel pier 3, and concrete pile 1 into a whole through concrete and the extended longitudinal reinforcement 1.2 above the concrete pile 1. The three components cooperate with each other, resulting in high connection reliability.

[0040] On the other hand, since the steel pier 3 includes a steel pipe 3.1, and concrete is poured inside the steel pipe 3.1 to fill its inner cavity, only the steel pipe 3.1 needs to be lifted when hoisting the steel pier 3, which can greatly reduce the lifting weight of the steel pier 3 and facilitate actual hoisting. After the steel pipe 3.1 is hoisted, the inner cavity of the steel pipe 3.1 is filled by pouring concrete 3.2 inside the steel pipe 3.1, thereby ensuring the structural strength and stability of the steel pier 3.

[0041] Furthermore, the steel pier and single concrete pile foundation connection structure of this embodiment has fewer components and is easier to manufacture; the required hoisting components are lightweight (the required hoisting components include the steel casing 2 and the steel pipe 3.1 of the steel pier 3, which are lightweight), making them easy to hoist.

[0042] In this embodiment, as Figure 2 As shown, the concrete pile foundation 1 is also provided with several pile foundation annular stirrups 1.4 arranged sequentially from bottom to top, and the pile foundation annular stirrups 1.4 are arranged around each longitudinal steel bar 1.1. The steel casing 2 is a permanent steel casing 2.

[0043] Furthermore, such as Figure 2 As shown, several pile-top annular stirrups 1.3 are also provided above the concrete pile foundation 1, arranged sequentially from bottom to top. The pile-top annular stirrups 1.3 are arranged around each of the extended longitudinal bars 1.2, and are located between the steel casing 2 and the steel pier 3. In this way, the reliability of the connection between the steel casing 2, the steel pier 3 and the concrete pile foundation 1 can be further improved.

[0044] Furthermore, such as Figure 1 , Figure 2 As shown, the steel casing 2 is cylindrical. The diameter of the steel casing 2 is 20-40 cm larger than the diameter of the concrete pile foundation 1, for example, 20 cm, 30 cm, or 40 cm larger. If the diameter of the steel casing 2 is too large, it will affect the high reliability of the connection between the steel casing 2, the steel pier 3, and the concrete pile foundation 1; moreover, a large diameter will increase manufacturing costs and weight, making hoisting more difficult. Therefore, in this embodiment, the diameter of the steel casing 2 is set to be 20-40 cm larger than the diameter of the concrete pile foundation 1. This ensures high reliability of the connection between the steel casing 2, the steel pier 3, and the concrete pile foundation 1, while avoiding the problems of increased manufacturing costs and hoisting difficulty caused by an excessively large diameter.

[0045] The height of the steel casing 2 is greater than the diameter of the pile foundation, and the upper end of the extended longitudinal reinforcement 1.2 is lower than the upper end of the steel casing 2. In this embodiment, the height of the steel casing 2 is less than twice the diameter of the pile foundation. If the height of the steel casing 2 is too small, it will affect the high reliability of the connection between the steel casing 2, the steel pier 3, and the concrete pile foundation 1. If the height of the steel casing 2 is too large, it will increase the manufacturing cost and the weight of the steel casing 2, and increase the difficulty of hoisting the steel casing 2. Therefore, this solution sets the height of the steel casing 2 to be greater than the diameter of the pile foundation, and the upper end of the extended longitudinal reinforcement 1.2 to be lower than the upper end of the steel casing 2. This ensures the high reliability of the connection between the steel casing 2, the steel pier 3, and the concrete pile foundation 1, and avoids the problems of increased manufacturing cost and increased hoisting difficulty caused by an excessively large height of the steel casing 2.

[0046] It should be noted that setting the steel casing 2 as a cylindrical shape is only a preferred solution in this embodiment; in actual construction, other shapes of steel casing 2 can also be selected as needed, such as square or elliptical steel casing 2.

[0047] Furthermore, such as Figure 1As shown, the inner wall of the steel casing 2 is provided with a shear-resistant structure 2.1. The shear-resistant structure 2.1 includes protruding steel structures welded to the inner wall of the steel casing 2. These protruding steel structures include, but are not limited to, the following forms: internal studs welded to the inner side of the steel casing 2; rectangular, trapezoidal, or circular steel pipes or plates, or other steel structures welded to the inner side of the steel casing 2. This further improves the reliability of the connection between the steel casing 2, the steel pier 3, and the concrete pile foundation 1, and enhances the shear resistance of the connection structure between the steel pier and the single concrete pile foundation.

[0048] Furthermore, such as Figure 1 , Figure 3 As shown, a number of internal studs 3.3 are distributed from top to bottom on the inner wall of the steel pipe 3.1, and the internal studs 3.3 are welded to the inner wall of the steel pipe 3.1. In this embodiment, the internal studs 3.3 are evenly distributed on the inner wall of the steel pipe 3.1, and the internal studs 3.3 extend radially along the steel pipe 3.1. In this way, on the one hand, the connection between the concrete inside the steel pipe 3.1 and the steel pipe 3.1 can be strengthened; on the other hand, the shear resistance of the steel pier 3 can be improved by the cooperation between the internal studs 3.3 and the concrete inside the steel pipe 3.1.

[0049] Furthermore, such as Figure 1 As shown, a ring-shaped steel plate 3.5 is welded to the lower end of the steel pipe 3.1, and the ring-shaped steel plate 3.5 is perpendicular to the axis of the steel pipe 3.1. In this way, casting the ring-shaped steel plate 3.5 into the concrete of the steel casing 2 can further improve the reliability of the connection between the steel casing 2, the steel pier 3 and the concrete pile foundation 1.

[0050] Furthermore, such as Figure 1 , Figure 3 As shown, the bottom of the outer wall of the steel pier 3 is provided with a shear-resistant structure 3.4. The shear-resistant structure 3.4 includes several side steel plates 3.41 distributed circumferentially on the outer side of the steel pier 3. The side steel plates 3.41 are welded to the outer wall of the steel pier 3, and the steel plates are vertically distributed and extend along the steel pier 3. This shear-resistant structure 3.4 can further improve the reliability of the connection between the steel casing 2, the steel pier 3, and the concrete pile foundation 1; on the other hand, it can also further improve the shear resistance of the connection structure between the steel pier 3 and the single concrete pile foundation 1. In this embodiment, the side steel plates 3.41 are welded to the outer wall of the steel pipe 3.1, and the top of the side steel plates 3.41 is lower than the top of the steel casing 2.

[0051] Furthermore, such as Figure 1 , Figure 2As shown, the shear-resistant structure 3.4 of the pier also includes several ring-shaped reinforcing bars 3.42 distributed sequentially from bottom to top. Each steel plate has several reinforcing bar through-holes corresponding to the ring-shaped reinforcing bars 3.42, and the reinforcing bar through-holes on the same steel plate are distributed sequentially from bottom to top. The ring-shaped reinforcing bars 3.42 pass through the corresponding reinforcing bar through-holes on each steel plate and surround the outside of the steel pier 3. In this way, on the one hand, the reliability of the connection between the steel casing 2, the steel pier 3, and the concrete pile foundation 1 can be further improved; on the other hand, the shear resistance of the connection structure between the steel pier 3 and the single concrete pile foundation 1 can be further improved.

[0052] Specific Embodiment 3: A construction method for a connection structure between a steel bridge pier and a single concrete pile foundation. The specific structure of the connection structure between the steel bridge pier and the single concrete pile foundation in this construction method is the same as that in Specific Embodiment 2.

[0053] A construction method for a steel bridge pier and single concrete pile foundation connection structure includes the following steps in sequence.

[0054] Step 1: Construct concrete pile foundation 1;

[0055] Step 2: Remove the substandard concrete on the top of the concrete pile foundation 1; straighten the extended longitudinal reinforcement 1.2; place multiple layers of steel mesh 4 on the top of the concrete pile foundation 1 from bottom to top; tie the pile top annular stirrup 1.3 to the extended longitudinal reinforcement 1.2 on the top of the pile.

[0056] Step 3: Hoist the steel casing 2 and the steel pipe 3.1 of the steel pier 3, so that the lower end of the steel pier 3 and the upper end of the concrete pile foundation 1 both extend into the steel casing 2, and the extended longitudinal reinforcement 1.2 is distributed between the steel casing 2 and the steel pier 3.

[0057] Step 4: Pour concrete 5 into the gap between the steel casing 2 and the steel pipe 3.1 of the steel pier 3, and between the steel casing 2 and the concrete pile 1. The concrete 5 in the casing will fill the gap between the steel casing 2 and the steel pier 3, and between the steel casing 2 and the concrete pile 1.

[0058] Concrete 3.2 is poured into the steel pipe 3.1 of the steel pier 3 to fill the inner cavity of the steel pipe 3.1.

[0059] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A connection structure between a steel bridge pier and a single concrete pile foundation, characterized in that, include: A concrete pile foundation has several longitudinal steel bars arranged in a ring inside, with the upper ends of the longitudinal steel bars extending above the concrete pile foundation to form outward longitudinal bars above the concrete pile foundation. The steel piers located above the concrete pile foundations have several layers of steel mesh stacked from bottom to top between them and the concrete pile foundations. The steel casing extends into the lower end of the steel pier and the upper end of the concrete pile foundation. The extended longitudinal reinforcement is distributed between the steel casing and the steel pier. The gap between the steel casing, the steel pier, and the concrete pile foundation is filled with concrete inside the casing.

2. The connection structure between a steel bridge pier and a single concrete pile foundation according to claim 1, characterized in that, The steel casing is cylindrical, with a diameter 20-40cm larger than the diameter of the concrete pile foundation. The height of the steel casing is greater than the diameter of the pile foundation, and the upper end of the extended longitudinal reinforcement is lower than the upper end of the steel casing.

3. The connection structure between a steel bridge pier and a single concrete pile foundation according to claim 1, characterized in that, The inner wall of the steel casing is provided with a shear-resistant structure, which includes a protruding steel structure welded to the inner wall of the steel casing.

4. A connection structure between a steel bridge pier and a single concrete pile foundation according to claim 1, 2, or 3, characterized in that, The steel bridge pier comprises a steel pipe, into which concrete is poured to fill the inner cavity of the steel pipe.

5. The connection structure between a steel bridge pier and a single concrete pile foundation according to claim 4, characterized in that, The inner wall of the steel pipe has several internal studs distributed from top to bottom, and the internal studs are welded to the inner wall of the steel pipe.

6. The connection structure between a steel bridge pier and a single concrete pile foundation according to claim 4, characterized in that, The lower end of the steel pipe is welded with a ring-shaped steel plate, which is perpendicular to the axis of the steel pipe.

7. A connection structure between a steel bridge pier and a single concrete pile foundation according to claim 1, 2, or 3, characterized in that, The bottom of the outer wall of the steel pier is provided with a shear-resistant structure, which includes several side steel plates distributed circumferentially on the outside of the steel pier. The side steel plates are welded to the outer wall of the steel pier and are vertically distributed and extend along the steel pier.

8. The connection structure between a steel bridge pier and a single concrete pile foundation according to claim 7, characterized in that, The shear-resistant structure of the pier also includes several ring-shaped reinforcing bars distributed sequentially from bottom to top. Each steel plate is provided with several reinforcing bar through holes corresponding to the ring-shaped reinforcing bars. The ring-shaped reinforcing bars pass through the corresponding reinforcing bar through holes on each steel plate and surround the outside of the steel pier.

9. A connection structure between a steel bridge pier and a single concrete pile foundation according to claim 1, 2, or 3, characterized in that, Above the concrete pile foundation, there are also several pile top annular stirrups distributed sequentially from bottom to top. The pile top annular stirrups are arranged around each of the extended longitudinal bars and are located between the steel casing and the steel pier.

10. A connection structure between a steel bridge pier and a single concrete pile foundation according to claim 1, 2, or 3, characterized in that, The concrete pile foundation is also provided with a number of pile foundation annular stirrups distributed sequentially from bottom to top, and the pile foundation annular stirrups are arranged around each longitudinal steel bar.

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