A steel pipe pile casing for in-situ reconstruction of collapsed bridges

Abstract

The present invention discloses a steel pipe pile casing for in-situ reconstruction of collapsed bridges, which relates to the field of bridge construction structures. The casing comprises a base; and a first cylinder, which is connected to the base. The first cylinder is provided with a first end at one end away from the base, and the cross-sectional area of ​​the first end gradually decreases from close to the base to away from the base. The surface of the first end is provided with a plurality of protrusions, the length direction of each protrusion is the same as the direction of the central axis of the first end, each protrusion gradually decreases from close to the first end to away from the first end, and each protrusion is spirally distributed around the central axis of the first end. The steel pipe pile casing for in-situ reconstruction of collapsed bridges can reduce the impact of concrete blocks on the driving process and improve construction efficiency.

Description

Technical Field

[0001] The invention relates to the field of bridge construction structures, and in particular to a steel pipe pile casing for in-situ reconstruction of collapsed bridges. Background Art

[0002] During the in-situ reconstruction of collapsed bridges and highway expansion and renovation projects, the old bridges need to be demolished and rebuilt in situ. Unavoidably, there are many concrete blocks under the bridges, which become the biggest obstacle to the installation of pile foundation casings on the trestle platform. During the installation of the steel pipe pile casings on the trestle platform, the large concrete blocks at the bottom of the casings will make it impossible to insert the casings, and in severe cases, the bottom of the steel pipe casings will be deformed and damaged. Moreover, the cleaning of the concrete blocks in the river after the collapse of the bridge requires a lot of manpower and material resources. This seriously affects the installation of the steel pipe pile casings on the trestle platform, and the construction efficiency is low. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the present invention aims to provide a steel pipe pile casing for in-situ reconstruction of collapsed bridges, which can reduce the impact of concrete blocks on the driving process and improve construction efficiency.

[0004] The present invention is implemented by the following technical solutions:

[0005] A steel pipe pile casing for in-situ reconstruction of collapsed bridges comprises a base; and a first cylinder, wherein the first cylinder is connected to the base, and a first end portion is provided at an end of the first cylinder away from the base, wherein the cross-sectional area of ​​the first end portion gradually decreases from close to the base to away from the base; wherein a plurality of protrusions are provided on the surface of the first end portion, wherein the length direction of each protrusion is the same as the direction of the central axis of the first end portion, and each protrusion gradually decreases from close to the first end portion to away from the first end portion, and each protrusion is distributed in a spiral shape around the central axis of the first end portion.

[0006] Preferably, the base includes a second cylinder, the first cylinder is provided with a second end, the second end is arranged opposite to the first end, the second cylinder and the second end are both arranged in a cylindrical shape, and the second cylinder is connected to the second end.

[0007] Preferably, a steel plate is provided at the connection between the second end and the second cylinder, one end of the steel plate is connected to the first end, and the other end is connected to the second cylinder, and the side curvature of the steel plate close to the second end and the second cylinder matches the side curvature of the second end and the second cylinder.

[0008] Preferably, the width of the steel plate gradually decreases from a side close to the second end portion and the second cylinder to a side away from the second end portion and the second cylinder.

[0009] Preferably, the first end portion is configured to be conical, and the cone angle of the first end portion is configured to be 30°.

[0010] Preferably, an anchor structure is provided inside the first end portion, the anchor structure comprising a reinforcement ring and reinforcement ribs, both ends of the reinforcement ribs are connected to the inner side of the reinforcement ring, and the outer side of the reinforcement ring abuts against the inner wall of the first end portion.

[0011] Preferably, a plurality of support members are provided on the anchor bar structure, each support member corresponds to each protrusion one by one, and each support member abuts against the inner wall of the position corresponding to the protrusion of the first end portion.

[0012] Preferably, the inner side surface of the first end is provided with a concave-convex structure.

[0013] Preferably, a fender is provided between each protrusion and the outer surface of the first end portion, one side of the fender is connected to the corresponding protrusion, and the other side is connected to the first end portion.

[0014] Preferably, a first connecting structure is provided on a side of the second end close to the second cylinder, and a second connecting structure is provided on a side of the second cylinder close to the second end, and the first connecting structure can be clamped and connected with the second connecting structure.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the steel pipe pile casing for in-situ reconstruction of collapsed bridges of the present invention gradually reduces the cross-sectional area of ​​the first end from close to the base to away from the base, so that stress concentration will occur when the first end encounters a concrete block, and the concrete block can be easily crushed, thereby solving the problem of obstruction of the insertion of the steel casing of the pier platform, avoiding the cleaning of concrete blocks, reducing labor costs, alleviating the impact of concrete blocks on the insertion process, and improving construction efficiency. In addition, by gradually reducing the cross-sectional area of ​​the first end from close to the base to away from the base, after the first end is inserted into the soil layer, the contact area of ​​the first end with the deep soil layer is increased compared with the ordinary steel pipe pile casing, and the frictional resistance is increased, thereby improving the stability of the steel pipe pile casing in the deep soil layer. The steel pipe pile casing for in-situ reconstruction of collapsed bridges of the present invention is provided with a plurality of protrusions on the surface of the first end portion. The protrusions can crush fragmented concrete blocks, thereby further reducing the impact of the concrete blocks on the steel pipe pile casing and greatly improving construction efficiency. In addition, by distributing the protrusions in a spiral shape around the central axis of the first end portion, it can be ensured that the protrusions on the side of the first end portion crush the concrete more evenly and the crushing efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the external structure of a steel pipe pile casing for in-situ reconstruction of a collapsed bridge according to an embodiment of the present invention.

[0017] Figure 2 Schematic diagram of the partial structure of a steel pipe pile casing for in-situ reconstruction of a collapsed bridge according to an embodiment of the present invention.

[0018] Figure 3 This is a top view of a steel pipe pile casing used for in-situ reconstruction of a collapsed bridge in an embodiment of the present invention.

[0019] Figure 4 Schematic diagram of the internal structure of a steel pipe pile casing used for in-situ reconstruction of a collapsed bridge in an embodiment of the present invention.

[0020] Figure 5 Schematic diagram of the disassembly of the first cylinder and the second cylinder in an embodiment of the present invention.

[0021] Figure numerals: 1. base; 2. first cylinder; 3. first end; 4. protrusion; 5. second cylinder; 6. second end; 7. steel plate; 8. anchor structure; 9. reinforcement ring; 10. reinforcement; 11. support member; 12. concave-convex structure; 13. mudguard; 14. arc-shaped bottom edge; 15. first connecting structure; 16. second connecting structure. DETAILED DESCRIPTION

[0022] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be understood as a limitation on the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0024] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0025] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0026] Reference Figures 1 to 2 A preferred embodiment of the steel pipe pile casing for in-situ reconstruction of collapsed bridges in the present invention includes a base 1; and a first cylinder 2, the first cylinder 2 is connected to the base 1, and a first end portion 3 is provided at the end of the first cylinder 2 away from the base 1, and the cross-sectional area of ​​the first end portion 3 gradually decreases from close to the base 1 to away from the base 1; wherein, a plurality of protrusions 4 are provided on the surface of the first end portion 3, the length direction of each protrusion 4 is the same as the direction of the central axis of the first end portion 3, each protrusion 4 gradually decreases from close to the first end portion 3 to away from the first end portion 3, and each protrusion 4 is spirally distributed around the central axis of the first end portion 3. The steel pipe pile casing for in-situ reconstruction of collapsed bridges of the present invention gradually reduces the cross-sectional area of ​​the first end portion 3 from close to the base 1 to away from the base 1, so that stress concentration will be generated when the first end portion 3 encounters a concrete block, and the concrete block can be easily crushed, thereby solving the problem of obstruction in the insertion of the steel casing of the trestle platform, avoiding the cleaning of concrete blocks, reducing labor costs, and improving construction efficiency. In addition, by gradually reducing the cross-sectional area of ​​the first end portion 3 from close to the base 1 to away from the base 1, after the first end portion 3 is inserted into the soil layer, the contact area of ​​the first end portion 3 with the deep soil layer is increased compared with ordinary steel pipe pile casings, and the frictional resistance is increased, thereby improving the stability of the steel pipe pile casing in the deep soil layer. The steel pipe pile casing for in-situ reconstruction of collapsed bridges of the present invention is provided with a plurality of protrusions 4 on the surface of the first end portion 3. The protrusions 4 can crush fragmented concrete blocks, thereby further reducing the impact of the concrete blocks on the steel pipe pile casing and greatly improving construction efficiency. In addition, by distributing the protrusions 4 in a spiral shape around the central axis of the first end portion 3, it can be ensured that the protrusions 4 on the side of the first end portion 3 crush the concrete more evenly and with higher crushing efficiency.

[0027] As a preferred embodiment of the drying rack of the present invention, it may also have the following additional technical features:

[0028] In this embodiment, the base 1 includes a second cylinder 5, and a second end 6 is provided on the first cylinder 2. The second end 6 is arranged opposite to the first end 3. The second cylinder 5 and the second end 6 are both cylindrically arranged. The second cylinder 5 is connected to the second end 6. In this way, after the first end 3 crushes the concrete into the soil layer, the second end 6 and the second cylinder 5 have enough space to enter the soil layer. The cylindrical second cylinder 5 and the second end 6 can reduce the resistance of the concrete to the whole, thereby making the insertion process of the steel pipe pile casing easier and improving construction efficiency. In other embodiments, the second cylinder 5 and the second end 6 can also adopt other suitable shapes instead of cylindrical, and are not limited to this.

[0029] In this embodiment, a steel plate 7 is provided at the connection between the second end portion 6 and the second cylinder body 5. One end of the steel plate 7 is connected to the first end portion 3, and the other end is connected to the second cylinder body 5. The side curvature of the steel plate 7 close to the second end portion 6 and the second cylinder body 5 matches the side curvature of the second end portion 6 and the second cylinder body 5. On the one hand, the steel plate 7 can improve the structural stability of the connection between the second end portion 6 and the second cylinder body 5. Matching the side curvature of the steel plate 7 close to the second end portion 6 and the second cylinder body 5 with the side curvature of the second end portion 6 and the second cylinder body 5 can better improve the structural stability of the connection between the second end portion 6 and the second cylinder body 5. On the other hand, the steel plate 7 can further crush the concrete on the edge of the steel pipe pile casing, thereby reducing the resistance of the concrete to the steel pipe pile casing and improving construction efficiency.

[0030] Reference Figure 3 As shown, in this embodiment, the width of the steel plate 7 gradually decreases from the side close to the second end 6 and the second cylinder 5 to the side away from the second end 6 and the second cylinder 5, so that the area of ​​the side of the steel plate 7 close to the second end 6 and the second cylinder 5 is large, ensuring the stability of the connection structure between the second end 6 and the second cylinder 5, and the area of ​​the side of the steel plate 7 away from the second end 6 and the second cylinder 5 is small, which can, on the one hand, reduce the resistance of concrete and soil layers to the steel pipe pile casing during the insertion process, and on the other hand, can play a good role in crushing concrete, thereby improving construction efficiency.

[0031] In this embodiment, the first end portion 3 is configured in a cone shape, and the cone angle of the first end portion 3 is configured at 30°, which is the optimal cone angle of the first end portion 3. This angle can ensure that the strength of the first end portion 3 itself meets the requirements while reducing the friction between the first end portion 3 and the concrete.

[0032] In this embodiment, an anchor structure 8 is provided inside the first end portion 3 , and the anchor structure 8 includes a reinforcement ring 9 and reinforcement ribs 10 . The two ends of the reinforcement rib 10 are connected to the inner side of the reinforcement ring 9 , and the outer side of the reinforcement ring 9 abuts against the inner wall of the first end portion 3 .

[0033] Reference Figure 4As shown, in this embodiment, a plurality of support members 11 are provided on the anchor structure 8, and each support member 11 corresponds to each protrusion 4 one by one, and each support member 11 abuts against the inner wall of the position of the protrusion 4 at the first end portion 3. Since the protrusion 4 will crush the fragmented concrete during the insertion of the steel pipe pile casing, the connection between the first end portion 3 and the protrusion 4 will be subjected to a large impact force during the concrete crushing process. In order to allow the first end portion 3 to withstand the impact and prevent the first end portion 3 from being locally deformed, the setting of the support member 11 can play a role in compensating strength, thereby improving the strength of the local force-bearing part of the first end portion 3, so that the overall structural strength of the steel pipe pile casing is higher and more durable.

[0034] In this embodiment, a concave-convex structure 12 is provided on the inner side surface of the first end portion 3. On the one hand, the structural strength of the first end portion 3 is improved, and the front shell of the first end portion 3 is reduced when the concrete is crushed. On the other hand, when concrete is poured into the steel pipe pile casing, the inner wall of the steel pipe pile casing can be better aligned with the concrete structure, thereby greatly improving the overall structural strength of the steel pipe pile casing.

[0035] Reference Figure 2 As shown, in this embodiment, a mudguard 13 is provided between each protrusion 4 and the outer surface of the first end portion 3, one side of the mudguard 13 is connected to the corresponding protrusion 4, and the other side is connected to the first end portion 3. The provision of the mudguard 13 can prevent concrete from being stuck in the gap between each protrusion 4 and the outer surface of the first end portion 3, thereby reducing the resistance of the concrete to the steel pipe pile casing during the insertion process, making the insertion process smoother, and also reducing the local wear of the concrete between each protrusion 4 and the outer surface of the first end portion 3 during the insertion process, thereby improving the durability of the steel pipe pile casing. In addition, by connecting one side of the mudguard 13 to the corresponding protrusion 4 and the other side to the first end portion 3, the connection strength between the protrusion 4 and the first end portion 3 can be improved, preventing the protrusion 4 from breaking during the process of crushing the concrete layer, and improving safety.

[0036] In this embodiment, the bottom of the mudguard 13 is provided with an arc-shaped bottom edge 14. Compared with the bottom of the mudguard 13 provided with a flat bottom edge, the mudguard 13 provided with the arc-shaped bottom edge 14 can keep the lowest point in a sharp state. On the one hand, it prevents the setting of the mudguard 13 from affecting the protrusion 4 in crushing concrete. On the other hand, it enables the mudguard 13 itself to have the function of crushing concrete, thereby improving construction efficiency.

[0037] Reference Figure 5As shown, in this embodiment, a first connecting structure 15 is provided on the side of the second end 6 close to the second cylinder 5, and a second connecting structure 16 is provided on the side of the second cylinder 5 close to the second end 6. The first connecting structure 15 can be clamped and connected with the second connecting structure 16. The first connecting structure 15 and the second connecting structure 16 are both concave-convex structures 12. The concave-convex structure 12 of the first connecting structure 15 can be matched and connected with the concave-convex structure 12 of the second connecting structure 16. In this way, the second end 6 and the first cylinder 2 are welded on the basis of the clamping connection, which further improves the structural stability of the connection between the second end 6 and the first cylinder 2.

[0038] Under the premise that no conflict occurs, those skilled in the art may freely combine and superimpose the above-mentioned additional technical features.

[0039] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A steel pipe pile casing for in-situ reconstruction of collapsed bridges, characterized in that: include: Matrix (1); as well as a first cylinder (2), the first cylinder (2) being connected to the base (1), a first end portion (3) being provided at one end of the first cylinder (2) away from the base (1), the cross-sectional area of ​​the first end portion (3) gradually decreasing from a direction close to the base (1) to a direction away from the base (1); The surface of the first end portion (3) is provided with a plurality of protrusions (4), the length direction of each protrusion (4) is the same as the direction of the central axis of the first end portion (3), each protrusion (4) gradually decreases from the direction close to the first end portion (3) to the direction away from the first end portion (3), and each protrusion (4) is distributed in a spiral shape around the central axis of the first end portion (3); The base (1) comprises a second cylinder (5), a second end portion (6) is provided on the first cylinder (2), the second end portion (6) is arranged opposite to the first end portion (3), the second cylinder (5) and the second end portion (6) are both arranged in a cylindrical shape, and the second cylinder (5) is connected to the second end portion (6); A steel plate (7) is provided at the connection between the second end portion (6) and the second cylinder (5), one end of the steel plate (7) is connected to the first end portion (3), and the other end is connected to the second cylinder (5), and the curvature of the side surface of the steel plate (7) close to the second end portion (6) and the second cylinder (5) matches the curvature of the side surface of the second end portion (6) and the second cylinder (5); A fender (13) is provided between each protrusion (4) and the outer surface of the first end portion (3); one side of the fender (13) is connected to the corresponding protrusion (4), and the other side is connected to the first end portion (3); and the bottom of the fender is provided with an arc-shaped bottom edge; A first connecting structure (15) is provided on a side of the second end portion (6) close to the second cylinder (5), and a second connecting structure (16) is provided on a side of the second cylinder (5) close to the second end portion (6), wherein the first connecting structure (15) can be connected to the second connecting structure (16) by clamping. An anchor rib structure (8) is provided inside the first end portion (3), and the anchor rib structure (8) includes a reinforcement ring (9) and a reinforcement rib (10), both ends of the reinforcement rib (10) are connected to the inner side of the reinforcement ring (9), and the outer side of the reinforcement ring (9) abuts against the inner wall of the first end portion (3); a plurality of support members (11) are provided on the anchor rib structure (8), each support member (11) corresponds to each protrusion (4) one by one, and each support member (11) abuts against the inner wall of the position of the first end portion (3) corresponding to the protrusion (4).

2. The steel pipe pile casing for in-situ reconstruction of collapsed bridges according to claim 1 is characterized in that: The width of the steel plate (7) gradually decreases from a side close to the second end portion (6) and the second cylinder (5) to a side away from the second end portion (6) and the second cylinder (5).

3. The steel pipe pile casing for in-situ reconstruction of collapsed bridges according to claim 1 is characterized in that: The first end portion (3) is arranged in a cone shape, and the cone angle of the first end portion (3) is arranged at 30°.

4. The steel pipe pile casing for in-situ reconstruction of collapsed bridges according to claim 1, characterized in that: The inner side surface of the first end portion (3) is provided with a concave-convex structure (12).

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