A steel pipe pile assembly component and a steel trestle bridge

Abstract

This utility model provides a steel pipe pile assembly component and a steel trestle. The steel pipe pile assembly component includes a first sleeve, a second sleeve, and a partition plate. During assembly, two sections of steel pipe piles are respectively fitted into the first and second sleeves and then fixed with bolts. This avoids the series of processes involved in traditional welding operations, such as positioning, beveling, grinding, welding, and weld inspection, greatly improving installation speed. It also reduces the high requirements of traditional welding methods on the operating environment, enabling rapid construction even in complex environments such as the field, damp areas, and river channels. Unlike welding methods, it is not easily affected by human factors, leading to defects such as incomplete welds and cracks, resulting in better connection quality and stronger controllability. Furthermore, it avoids the disassembly difficulties associated with welding methods. After assembling the steel pipe piles using this assembly component, disassembly can be performed when necessary, facilitating the replacement of specific sections of the steel pipe piles or connecting parts, thus improving service life and maintenance efficiency.

Description

Technical Field

[0001] This utility model relates to the field of engineering construction, and in particular to a steel pipe pile assembly component and a steel trestle bridge. Background Technology

[0002] With the increasing demands for construction efficiency, environmental protection, and quality control in the engineering construction field, prefabricated steel trestle bridges, as a new type of bridge structure, use standardized and modular components and achieve rapid assembly through prefabrication and on-site assembly. They have gradually become an important choice in construction fields such as civil engineering and transportation infrastructure construction.

[0003] Currently, the main assembly methods for prefabricated steel trestle bridges include plug-in connections, flange connections, and on-site welding. Among these, on-site welding has become the most widely used method due to its high connection strength and good structural integrity. However, on-site welding has the following disadvantages:

[0004] (1) A series of procedures are required for the steel pipe pile, including positioning, beveling, grinding, welding and weld inspection, which takes a lot of time.

[0005] (2) It is susceptible to the influence of weather, site conditions and personnel arrangements.

[0006] (3) It is susceptible to the influence of temperature, humidity and the skill level of the operator, resulting in unstable welding quality.

[0007] (4) The risk of defects or cracks in the weld is high, requiring additional inspection and repair. Utility Model Content

[0008] In view of the shortcomings of the prior art described above, the technical problem to be solved by this utility model is to provide a steel pipe pile assembly assembly and a steel trestle bridge to solve the above problems.

[0009] To address the aforementioned and other related issues, the first aspect of this utility model provides a steel pipe pile assembly for connecting two sections of steel pipe piles, comprising: a first sleeve and a second sleeve, both being cylindrical structures, respectively fitted onto the outer surfaces of the two sections of the steel pipe pile; a partition plate, the upper side of which abuts against the fixed end face of the first sleeve, and the lower side of which abuts against the fixed end face of the second sleeve; wherein, the sidewalls of the first sleeve and / or the second sleeve are respectively provided with two symmetrically distributed first through holes, and the corresponding positions of the steel pipe piles fitted inside the first sleeve and / or the second sleeve are also provided with second through holes of the same diameter, and the first sleeve and / or the second sleeve and their corresponding steel pipe piles are respectively fitted onto each other and then fixed by bolts passing through the first through holes and the second through holes.

[0010] In one embodiment of the first aspect of this application, a plurality of annular grooves or protrusions of different diameters are provided at corresponding positions on both sides of the partition to limit steel pipe piles of different diameters.

[0011] In one embodiment of the first aspect of this application, at least two third through holes are provided on the partition plate. The first through hole is located on the inner wall of the circumference corresponding to the abutment of the fixed end face of the second sleeve. The first through hole is used to inject sealing material into the gap between the second sleeve and the steel pipe pile to which it is fitted.

[0012] In one embodiment of the first aspect of this application, the first sleeve and the second sleeve have the same diameter.

[0013] In one embodiment of the first aspect of this application, the diameters of the first sleeve and the second sleeve are different.

[0014] In one embodiment of the first aspect of this application, a plurality of support ribs are provided between the outer wall of the sleeve with the smaller diameter in the first sleeve and the partition.

[0015] In one embodiment of the first aspect of this application, the free ends of the first sleeve and the second sleeve are respectively welded and fixed to the outer surface of the steel pipe pile to which they are sleeved.

[0016] In one embodiment of the first aspect of this application, two symmetrically distributed auxiliary positioning pins are respectively provided on the sidewalls of the first sleeve and / or the second sleeve, and a recess is provided at the corresponding position of the steel pipe pile. After the first sleeve and / or the second sleeve are respectively sleeved with the steel pipe pile, the auxiliary positioning pins and their corresponding recesses engage with each other.

[0017] In one embodiment of the first aspect of this application, the first sleeve, the second sleeve, and the partition are integrally formed.

[0018] To address the aforementioned and other related issues, a second aspect of this application provides a steel trestle bridge, comprising: a bridge body and a support section, wherein the support section includes steel pipe piles and a steel pipe pile assembly as described above.

[0019] As described above, the present invention has the following beneficial effects:

[0020] The steel pipe pile assembly designed in this utility model includes a first sleeve and a second sleeve, both of which are cylindrical structures and are respectively fitted onto the outer surfaces of two sections of the steel pipe pile. A partition plate is also included, with its upper side abutting against the fixed end face of the first sleeve and its lower side abutting against the fixed end face of the second sleeve. At least one first through hole is provided on the partition plate, located on the inner wall of the circumference corresponding to the abutment point between the partition plate and the fixed end face of the second sleeve. The first through hole is used to inject sealing material into the gap between the second sleeve and the steel pipe pile it fits into. When assembling the support part of the steel trestle bridge, the two sections of steel pipe pile are mechanically fitted together using this steel pipe pile assembly and then fixed with bolts, avoiding the series of processes involved in traditional welding operations such as positioning, beveling, grinding, welding, and weld inspection, greatly improving the installation speed. Furthermore, it reduces the high requirements of the operating environment for traditional welding methods, enabling rapid construction even in complex environments such as the field, damp areas, and river channels. Unlike welding, which is susceptible to defects such as incomplete welds and cracks due to human factors, this method offers better connection quality and greater controllability. Furthermore, it avoids the disassembly difficulties associated with welding. After assembling the steel pipe piles using this assembly kit, disassembly can be performed when necessary, facilitating the replacement of specific sections of the steel pipe pile or connecting parts, thus improving service life and maintenance efficiency. Attached Figure Description

[0021] Figure 1 The diagram shows a steel pipe pile assembly assembly and a structural schematic diagram of the assembled steel pipe pile in one embodiment of this application.

[0022] Figure 2 The diagram shown is a structural schematic of a steel pipe pile assembly component according to an embodiment of this application.

[0023] Figure 3 Displayed as Figure 2 A schematic diagram of section AA.

[0024] Figure 4 The diagram shown is a structural schematic of a steel trestle bridge in one embodiment of this application.

[0025] Figure 5 The diagram shows a steel pipe pile assembly assembly and a structural schematic diagram of the assembled steel pipe pile in one embodiment of this application.

[0026] Figure 6 The diagram shown is a structural schematic of a steel pipe pile assembly component according to an embodiment of this application.

[0027] Figure 7 Displayed as Figure 6 A schematic diagram of the BB section.

[0028] Figure 8 Displayed as Figure 6 A schematic diagram of the CC section.

[0029] Figure 9 The diagram shows a steel pipe pile assembly assembly and a structural schematic diagram of the assembled steel pipe pile in one embodiment of this application.

[0030] Component designation explanation

[0031] Steel pipe pile assembly component 1

[0032] First sleeve 11

[0033] Second sleeve 12

[0034] First through hole 11a

[0035] Bolt 11b

[0036] partition 13

[0037] Third through hole 13a

[0038] Support rib 14

[0039] Sealing material 15

[0040] Weld 16

[0041] Steel pipe pile 2

[0042] Second through hole 21

[0043] Bridge main body 3 Detailed Implementation

[0044] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0045] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed in this utility model. The following detailed description should not be considered restrictive, and the scope of the embodiments of this application is limited only by the claims of the published patents. The terminology used herein is for describing specific embodiments only and is not intended to limit this application. Spatial terms such as "upper," "lower," "left," "right," "below," "below," "lower part," "above," "upper part," etc., may be used in the text to illustrate the relationship between one element or feature shown in the figures and another element or feature.

[0046] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "holding" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of the stated feature, operation, element, component, item, kind, and / or group, but do not preclude the presence, occurrence, or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition arise only when combinations of elements, functions, or operations are inherently mutually exclusive in some manner.

[0048] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the invention.

[0049] like Figure 1-9 As shown, the first aspect of this utility model provides a steel pipe pile assembly 1 for connecting two steel pipe piles 2, comprising: a first sleeve 11 and a second sleeve 12, both of which are cylindrical structures and are respectively fitted onto the outer surfaces of the two steel pipe piles 2; a partition 13, the upper side of which abuts against the fixed end face of the first sleeve 11 and the lower side of which abuts against the fixed end face of the second sleeve 12; wherein, the sidewalls of the first sleeve 11 and / or the second sleeve 12 are respectively provided with two symmetrically distributed first through holes 11a, and the corresponding positions of the steel pipe piles 2 fitted inside the first sleeve 11 and / or the second sleeve 12 are also provided with second through holes 21 of the same diameter, and after the first sleeve 11 and / or the second sleeve 12 and their corresponding steel pipe piles 2 are respectively fitted, they are fixed by bolts 11b passing through the first through holes 11a and the second through holes 21.

[0050] It should be understood that steel pipe piles (2) are a common infrastructure construction material, widely used in pile foundations, ground treatment, and foundation pit support for large-scale projects such as bridges, buildings, and docks. Steel pipe piles (2) are typically made of high-strength steel, possessing strong load-bearing capacity, compressive strength, and corrosion resistance, making them particularly suitable as supporting foundations in soft soil or underwater environments. They are cylindrical in shape, and their length and diameter can be customized according to specific project needs. During construction, multiple sections of steel pipe piles (2) need to be connected to form long-distance support structures, requiring the use of steel pipe pile (2) connectors to ensure the stability and strength of the connection. The steel pipe pile (2) connectors provided in this invention firmly connect two sections of steel pipe piles (2) together, ensuring that they do not shift or loosen under stress, thereby maintaining the stability of the entire structure. Steel pipe pile (2) connectors typically have high load-bearing capacity, capable of resisting various external forces such as wind, earthquakes, and traffic loads, and must possess corrosion resistance and high durability to adapt to long-term working environments. This type of connector can effectively solve the connection problem between two sections of different steel pipe piles, enabling the overall structure to operate stably for a long time in different environments.

[0051] When assembling the steel pipe piles 2, the two sections of steel pipe piles 2 are respectively inserted into the first sleeve 11 and the second sleeve 12. After aligning the second through holes 21 on the side walls of the two steel pipe piles 2 with the first through holes 11a on the side walls of the first sleeve 11 and the second sleeve 12, the first sleeve 11, the second sleeve 12, and the steel pipe piles 2 are firmly fixed together by passing bolts 11b through these through holes, thus achieving a stable connection of the steel pipe piles 2. The specific connection process is as follows: First, the first sleeve 11 and the second sleeve 12 are respectively fitted onto the outer surfaces of the two sections of steel pipe piles 2 to ensure accurate and stable alignment. Next, the fit between the first sleeve 11, the second sleeve 12, and the steel pipe piles 2 is checked to ensure alignment of the through holes and to prepare for bolt 11b installation. Subsequently, the bolts 11b are passed through the first through holes 11a and the second through holes 21 and tightened together to ensure a firm connection. To enhance sealing and prevent corrosion, in some embodiments of this invention, a sealing material 15 may be injected at the contact point between the sleeve and the steel pipe pile 2. This helps to prevent moisture or other corrosive substances from entering the connection, further improving the durability of the component.

[0052] Preferably, in order to ensure that the steel pipe pile assembly 1 can maintain good performance for a long time in extreme environments such as marine and chemical corrosion, and to achieve high standards in terms of bearing capacity, corrosion resistance and durability, so as to ensure the stability of the infrastructure and the reliability of long-term use, the steel pipe pile assembly 1 can be made of high-strength steel or alloy materials, especially materials with strong corrosion resistance, such as stainless steel or galvanized steel.

[0053] In one embodiment of the first aspect of this application, a plurality of annular grooves or protrusions of different diameters are provided at corresponding positions on both sides of the partition 13 to limit steel pipe piles 2 of different diameters.

[0054] It should be understood that the different diameter grooves or protrusions on the sides of the partition plate 13 allow the assembly to accommodate steel pipe piles 2 of different diameters, providing greater adaptability and flexibility. This means that the diameters of the first sleeve 11 and the second sleeve 12 do not necessarily need to be exactly the same as the diameter of the steel pipe pile 2. Therefore, in practical applications, it can accommodate steel pipe piles 2 of various diameters, especially when the diameter of the steel pipe pile 2 is significantly smaller than that of the sleeve, this design still ensures a good connection effect.

[0055] Specifically, when the diameter of the steel pipe pile 2 is smaller than the diameter of the sleeve, the annular groove or protrusion on the partition plate 13 can position the steel pipe pile 2 on the annular groove or protrusion that matches the diameter of the steel pipe pile 2. The annular groove or protrusion acts as a limiting device, effectively connecting the steel pipe pile 2 to the sleeve and preventing displacement or loosening. After engagement, the gap between the steel pipe pile 2 and the sleeve is filled with sealing material 15 to further fix the steel pipe pile 2 connector and the steel pipe pile 2, improving structural strength. Even if the diameter of the steel pipe pile 2 does not perfectly match the sleeve, the annular groove or protrusion can still function, helping the steel pipe pile 2 remain stable within the sleeve through physical positioning. This makes the entire assembly process simpler and more flexible, avoiding the high requirement for precise dimensional matching between the steel pipe pile 2 and the sleeve.

[0056] like Figure 3 and 7 As shown, in one embodiment of the first aspect of this application, at least two third through holes 13a are provided on the partition 13. Specifically, there are four third through holes 13a in this embodiment. The first through hole 11a is located on the inner wall of the circumference corresponding to the contact point between the partition 13 and the fixed end face of the second sleeve 12. The first through hole 11a is used to inject sealing material 15 into the gap between the second sleeve 12 and the steel pipe pile 2 to which it is fitted.

[0057] It should be understood that the main function of the third through hole 13a is to further enhance the sealing and stability of the connection after the second sleeve 12 and the steel pipe pile 2 are connected. The specific process is as follows: First, after the second sleeve 12 is fitted onto the outer surface of the steel pipe pile 2, to ensure that the sealing material 15 does not leak during injection, it is recommended to first weld and seal the contact point between the bottom edge of the second sleeve 12 and the outer surface of the steel pipe pile 2, forming a completely sealed cavity. Then, the sealing material 15 is injected into the gap between the inner cavity of the second sleeve 12 and the outer surface of the steel pipe pile 2 through the third through hole 13a. Preferably, the commonly used sealing material 15 is generally high-performance epoxy resin, cement grout, or special polyurethane sealant, etc., and the choice of material depends on the specific waterproofing and corrosion protection requirements of the project. After the sealing material 15 is injected, it gradually solidifies and hardens, tightly filling the gap between the steel pipe pile 2 and the second sleeve 12, thus firmly bonding the two into a whole. This not only effectively prevents moisture and corrosive substances from entering the connection, but also significantly enhances the overall structural rigidity and durability of the component. Furthermore, providing two or more third through holes 13a ensures more uniform and rapid injection of the sealing material 15, avoiding the formation of local cavities and further improving the sealing effect and structural reliability.

[0058] It should be understood that a sealing material (15) may also be injected between the first sleeve and the outer surface of the steel pipe pile to which it is fitted, in order to fill the gap between the two and thereby strengthen the connection between them. Preferably, the sealing material includes epoxy resin and epoxy asphalt.

[0059] like Figure 1-4 As shown, in one embodiment of the first aspect of this application, the first sleeve 11 and the second sleeve 12 have the same diameter.

[0060] The first sleeve 11 and the second sleeve 12 have the same diameter, suitable for situations where the diameter of the steel pipe piles 2 is consistent or close. This design ensures that the two sleeves remain completely symmetrical during connection, guaranteeing structural stability and uniformity of the connection. Because the sleeves have the same diameter, the installation process is relatively simple, requiring no additional fitting measures, thus reducing assembly errors and improving connection accuracy. This design is suitable for projects where the specifications of the steel pipe piles 2 are relatively uniform, ensuring the reliability of the entire system.

[0061] like Figure 5-9 As shown, in one embodiment of the first aspect of this application, the diameters of the first sleeve 11 and the second sleeve 12 are different.

[0062] The first sleeve 11 and the second sleeve 12 have different diameters, which is mainly suitable for situations where the diameters of the steel pipe piles 2 vary significantly. The advantage of this design is that it can accommodate steel pipe piles 2 of different specifications, providing greater flexibility. When the diameters of the steel pipe piles 2 vary considerably, using sleeves of different diameters ensures that the connector can securely fix them regardless of changes in the diameter of the steel pipe piles 2. This solution typically requires a limiting function through an annular groove or a protrusion to ensure the stability of the connection. Furthermore, designs with different diameters usually require the use of sealing material 15 to enhance the sealing at the connection, avoiding gap problems caused by dimensional differences.

[0063] In one embodiment of the first aspect of this application, a plurality of support ribs 14 are provided between the outer wall of the sleeve with the smaller diameter in the first sleeve 11 and the partition 13.

[0064] It should be understood that the function of the support rib 14 is to enhance the overall rigidity and stability of the connecting assembly, especially when there is a large difference in diameter, providing additional support and fixation. Since there may be a large gap between the outer wall of the smaller diameter sleeve and the partition 13, if not addressed, this gap may cause the sleeve to deform or become unstable during use, especially under high stress. Therefore, the support rib 14 fills these gaps, enhances the structural stability between the small-diameter sleeve and the partition 13, and prevents local deformation caused by dimensional differences. As a reinforcing structural design, the support rib 14 effectively improves the rigidity of the outer wall of the small-diameter sleeve. By dispersing and transferring forces, the support rib 14 reduces the possibility of local deformation, ensuring the entire assembly remains stable under external loads, preventing bending or deformation, and guaranteeing a firm connection between the sleeve and the partition 13.

[0065] In one embodiment of the first aspect of this application, the free ends of the first sleeve 11 and the second sleeve 12 are respectively welded and fixed to the outer surface of the steel pipe pile 2 to which they are sleeved.

[0066] It should be understood that further reinforcement can be achieved by welding between the free ends of the first sleeve 11 and / or the second sleeve 12 and the outer surface of the sleeved steel pipe pile 2, such as weld 16. Figure 1 and 5 As shown.

[0067] In one embodiment of the first aspect of this application, two symmetrically distributed auxiliary positioning pins are respectively provided on the sidewalls of the first sleeve 11 and / or the second sleeve 12, and a recess is provided at the corresponding position of the steel pipe pile 2. After the first sleeve 11 and / or the second sleeve 12 are respectively sleeved with the steel pipe pile 2, the auxiliary positioning pins and their corresponding recesses engage with each other.

[0068] Specifically, the auxiliary locating pin, as a mechanical fixing device, ensures that the relative position of the first sleeve 11 or the second sleeve 12 with the steel pipe pile 2 remains accurate and does not shift during assembly. This design greatly reduces assembly errors, especially when the dimensions of the steel pipe pile 2 and the sleeve are not completely consistent. The cooperation between the locating pin and the recess helps the two to accurately align, thereby avoiding structural instability or assembly difficulties that may result from improper alignment. The recess on the steel pipe pile 2 and the cooperation with the auxiliary locating pin form a mechanical locking structure, which can effectively fix the relative position of the two. This not only enhances the stability during assembly but also improves the structural rigidity after installation. The recess design also provides a physical "locking" point between the steel pipe pile 2 and the sleeve, preventing any unnecessary sliding or displacement during use.

[0069] In one embodiment of the first aspect of this application, the first sleeve 11, the second sleeve 12, and the partition 13 are integrally formed structures.

[0070] It should be understood that designing the first sleeve 11, the second sleeve 12, and the partition 13 as a single molded structure avoids the connection and splicing between multiple components, eliminating potential loosening problems caused by improper component connections. Furthermore, no additional assembly of the partition 13 and sleeves is required during installation, reducing connection points and potential assembly errors. This not only improves assembly efficiency but also reduces quality problems caused by human assembly errors.

[0071] like Figure 4 and 9 As shown, a second aspect of this application provides a steel trestle bridge, comprising: a bridge body 3 and a support portion, wherein the support portion includes steel pipe piles 2 and a steel pipe pile assembly 1 as described above.

[0072] The main bridge structure 3 is the core of the steel trestle bridge, typically composed of steel or concrete structures, responsible for bearing the bridge deck and traffic loads above it. The main function of the support structure is to provide a stable foundation for the main bridge structure 3. During the construction of the steel trestle bridge, the support structure needs to cope with complex geological conditions, including different types of soil, groundwater levels, and potential natural forces such as earthquakes and wind. Therefore, the design of the support structure needs to be highly adaptable, allowing for flexible adjustment of the connections between steel pipe piles 2 of different specifications through the steel pipe pile assembly 1, ensuring stable operation of the support structure under various working conditions.

[0073] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0074] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A steel pipe pile assembly (1) for connecting two sections of steel pipe pile (2), characterized in that, include: The first sleeve (11) and the second sleeve (12) are both cylindrical structures and are respectively fitted onto the outer surfaces of the two sections of the steel pipe pile (2); A partition (13) is provided, the upper side of which abuts against the fixed end face of the first sleeve (11), and the lower side of which abuts against the fixed end face of the second sleeve (12). The side walls of the first sleeve (11) and / or the second sleeve (12) are respectively provided with two symmetrically distributed first through holes (11a). The corresponding positions of the steel pipe piles (2) fitted inside the first sleeve (11) and / or the second sleeve (12) are also provided with second through holes (21) of the same diameter. After the first sleeve (11) and / or the second sleeve (12) and their corresponding steel pipe piles (2) are fitted together, they are fixed by bolts (11b) passing through the first through holes (11a) and the second through holes (21).

2. The steel pipe pile assembly (1) according to claim 1, characterized in that, Several annular grooves or protrusions of different diameters are provided at corresponding positions on both sides of the partition (13) to limit steel pipe piles (2) of different diameters.

3. The steel pipe pile assembly (1) according to claim 1, characterized in that, At least two third through holes (13a) are provided on the partition plate (13). The first through hole (11a) is located on the inner wall of the circumference corresponding to the contact point between the partition plate (13) and the fixed end face of the second sleeve (12). The first through hole (11a) is used to inject sealing material (15) into the gap between the second sleeve (12) and the steel pipe pile (2) to which it is fitted.

4. The steel pipe pile assembly (1) according to claim 1, characterized in that, The first sleeve (11) and the second sleeve (12) have the same diameter.

5. A steel pipe pile assembly (1) according to claim 1, characterized in that, The first sleeve (11) and the second sleeve (12) have different diameters.

6. A steel pipe pile assembly (1) according to claim 5, characterized in that, Several supporting ribs (14) are provided between the outer wall of the sleeve with the smaller diameter in the first sleeve (11) and the partition plate (13).

7. A steel pipe pile assembly (1) according to claim 1, characterized in that, The free ends of the first sleeve (11) and the second sleeve (12) are welded and fixed to the outer surface of the steel pipe pile (2) to which they are sleeved.

8. A steel pipe pile assembly (1) according to claim 1, characterized in that, The first sleeve (11) and / or the second sleeve (12) are respectively provided with two symmetrically distributed auxiliary positioning pins on their side walls. The corresponding position of the steel pipe pile (2) is provided with a recess. After the first sleeve (11) and / or the second sleeve (12) are respectively sleeved with the steel pipe pile (2), the auxiliary positioning pins and their corresponding recesses are engaged with each other.

9. A steel pipe pile assembly (1) according to claim 1, characterized in that, The first sleeve (11), the second sleeve (12), and the partition (13) are integrally formed structures.

10. A steel trestle bridge, characterized in that, include: The bridge body (3) and the support, wherein the support includes steel pipe piles (2) and a steel pipe pile assembly (1) as described in any one of claims 1-9.

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