Continuous structure of deck of inverted T-shaped bent cap simple supported beam bridge and seamless construction method

Abstract

The application relates to a bridge deck continuous structure and seamless construction method of a simply-supported beam bridge with an inverted T-shaped cover beam, which comprises top surface truss steel bars, hinge-connection steel plates, an infinity-shaped steel pipe, side-connection steel plates, hinged bolts, connecting steel bars and structural steel bars; the main beam is arranged on both sides of the inverted T-shaped cover beam; the infinity-shaped steel pipe comprises two-side infinity-shaped steel pipes and a middle infinity-shaped steel pipe. The application has the beneficial effects that the infinity-shaped steel pipe can be prefabricated in a factory, and only the connection of the bolts and the steel bars is needed on the site, so that the installation of the device can be completed; for the old bridge, only the original device needs to be removed, and then the mechanical connection of the new device can be completed; the structure of the side hinged connection and the top hinge connection is utilized, so that the lateral connection of the infinity-shaped steel pipe can have a slight dislocation; when the main beam is subjected to a bending moment, the tensile force is indirectly applied to the two-side infinity-shaped steel pipes through the connecting steel bars due to the force transmission of the connecting steel bars.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of bridge structure, and particularly relates to a bridge deck continuous structure and seamless construction method of inverted T-shaped bent cap simple-supported beam bridge. BACKGROUND

[0002] In the past few decades, the bridge construction in China has achieved great development, and the bridge forms are more and more various. The simple-supported beam bridge is widely used in the medium and small span bridges due to its simple structure, clear stress and simple construction. However, the expansion joint device of the simple-supported beam bridge is complex in stress and is easy to be damaged, so a large amount of manpower and material resources are spent on the bridge maintenance every year.

[0003] Therefore, the bridge deck seamless technology is developed. The bridge deck continuity connects the bridge deck slab and the bridge deck pavement together to avoid the discomfort caused by the expansion joint and does not change the stress characteristics of the bridge.

[0004] However, the bridge deck continuity technology still needs to be further developed. The bridge deck continuity structure is located at the joint position of the main beam. Under the load of the vehicle load and the temperature load, the bridge deck continuity structure will bend and deform with the main beam, bear the negative bending moment and become the weak part of the bridge. For these problems, a bridge deck continuity structure which can resist the negative bending moment and reduce and adapt to the deformation of the main beam when the main beam is bent and deformed is still needed to be researched.

[0005] The common bridge deck continuity device mainly has the following three technical problems:

[0006] 1) The common bridge deck continuity device is easy to be damaged under the load of the vehicle load and the temperature load, especially the inverted T-shaped bent cap simple-supported beam bridge. When the main beam is subjected to the bending moment, the upper end of the main beam is subjected to tension, the upper concrete is easy to be cracked under tension, and the lower concrete is also easy to be damaged due to the extrusion of the main beam, which seriously affects the safety performance of the bridge.

[0007] 2) When the concrete is cracked or the bridge deck continuity is damaged, the common bridge deck continuity device is difficult to replace, needs to be re-poured on site, has long time and high cost, and the quality is difficult to guarantee due to the environmental conditions, which is easy to be damaged due to the construction and maintenance, and further affects the safety of driving. If it is in the area with large traffic volume, it will greatly affect the smoothness of traffic.

[0008] 3) The common bridge deck continuity device has a major flaw in the transverse connection. If the connection is too rigid, the transverse uplift may occur under certain load, and if the deformation is too large, the concrete may be cracked or the bridge deck continuity device may be damaged. SUMMARY

[0009] The present application aims to overcome the deficiencies in the prior art, and provide a bridge deck continuous structure and seamless construction method of inverted T-shaped bent cap simple-supported beam bridge.

[0010] The bridge deck continuous structure of the inverted T-shaped bent cap simple-supported beam bridge comprises: top truss reinforcement, hinge connecting steel plate, ∞-shaped steel pipe, side connecting steel plate, hinged bolt, connecting reinforcement and construction reinforcement; the main beam is arranged on both sides of the inverted T-shaped bent cap;

[0011] The ∞-shaped steel pipe is provided with a disc spring on the inner central axis, and the upper surface of the ∞-shaped steel pipe is provided with the top truss reinforcement; a plurality of ∞-shaped steel pipes are connected in the longitudinal direction by the hexagonal bolts to form a group, and the ∞-shaped steel pipes in the group are connected to each other in the transverse direction by the hinge connecting steel plate and the hexagonal bolts; the hinge connecting steel plate is arranged on the upper surface of the ∞-shaped steel pipe; wherein the longitudinal direction is the direction in which the main beams on both sides of the inverted T-shaped bent cap are connected to each other, and the transverse direction is the direction perpendicular to the longitudinal direction.

[0012] The ∞-shaped steel pipe comprises two-side ∞-shaped steel pipes and middle ∞-shaped steel pipes, and the two-side ∞-shaped steel pipes are fixedly connected to the main beams on both sides of the inverted T-shaped bent cap by the hexagonal bolts; the two-side ∞-shaped steel pipes in the adjacent two groups of ∞-shaped steel pipes are further connected to each other by a plurality of side hinge structures, and the side hinge structure comprises the side connecting steel plate and the hinged bolt.

[0013] The connecting reinforcement connects the outer bottom sections of the two-side ∞-shaped steel pipes, and the connecting reinforcement is connected to the construction reinforcement.

[0014] As a preferred, one group of ∞-shaped steel pipes is formed by connecting one two-side ∞-shaped steel pipe to each side of the middle ∞-shaped steel pipe.

[0015] As a preferred, the hinge connecting steel plate comprises two rotating shafts; in each group of side hinge structures, two side connecting steel plates are arranged at the connection positions of the two-side ∞-shaped steel pipes in the adjacent two groups of ∞-shaped steel pipes, and one side connecting steel plate is further arranged between the two side connecting steel plates, the middle side connecting steel plate is connected to the two side connecting steel plates by the two hinged bolts at the two ends of the middle side connecting steel plate, and each group of side hinge structures also comprises two rotating shafts; and the distance between the two rotating shafts of the hinge connecting steel plate is consistent with the distance between the two rotating shafts of the side hinge structure.

[0016] As a preferred, bolt holes matched with the hexagonal bolts are formed on the ∞-shaped steel pipe, and corresponding bolt holes are also formed on the main beam, and the bolt holes are all waist-shaped holes; in the initial state, the hexagonal bolts are arranged at the center of the waist-shaped holes.

[0017] As a preferred, a cement mortar leveling layer is arranged on the upper surface of the main beam, and a sliding layer is further arranged on the cement mortar leveling layer in the contact area between the main beam and the two-side ∞-shaped steel pipes.

[0018] As a preferred, the ∞-shaped steel pipe is filled with waterproof foam material.

[0019] As preferred: the concrete pavement of the bridge deck is arranged above the continuous structure of the bridge deck.

[0020] The seamless construction method of the continuous structure of the inverted T-shaped bent cap simple beam bridge deck comprises the following steps:

[0021] Step one: process the two side ∞-shaped steel pipes and the middle ∞-shaped steel pipe in the factory, weld the top surface truss steel bars on the top surfaces of the two side ∞-shaped steel pipes and the middle ∞-shaped steel pipe, set disc springs in each ∞-shaped steel pipe, and preset the waist-shaped holes on the ∞-shaped steel pipes;

[0022] Step two: place the two side ∞-shaped steel pipes on the main beam at the construction site, align the waist-shaped holes on the bottom surfaces of the two side ∞-shaped steel pipes with the waist-shaped holes reserved on the main beam, and connect them by using hexagonal bolts; align the waist-shaped holes on the connecting surfaces of the middle ∞-shaped steel pipe and the two side ∞-shaped steel pipes, and connect them by using hexagonal bolts;

[0023] Step three: horizontally align other ∞-shaped steel pipes with the installed ∞-shaped steel pipes, set a certain interval between two adjacent groups of ∞-shaped steel pipes in the horizontal direction, connect the upper surfaces of the two adjacent groups of ∞-shaped steel pipes by using hinge connecting steel plates and hexagonal bolts, and connect the side surfaces of the two adjacent groups of ∞-shaped steel pipes by using side connecting steel plates and hinge bolts; repeat steps two and three until the installation of all ∞-shaped steel pipes is completed;

[0024] Step four: fix the connecting steel bars to the outer bottom sections of the two side ∞-shaped steel pipes, then fix the connecting steel bars and the structural steel bars, fill waterproof foam materials in each ∞-shaped steel pipe, and finally pour the concrete pavement.

[0025] The beneficial effects of the present application are:

[0026] 1) The ∞-shaped steel pipes can be prefabricated in the factory, and only the connection of bolts and steel bars needs to be performed on site, so that the installation of the device can be completed. For old bridges, only the original device needs to be removed, and then the mechanical connection of the new device can be completed, which not only reduces a large amount of construction time, but also greatly guarantees the safety because the quality of the continuous bridge deck module, such as maintenance condition, welding condition, and waterproof coating condition, is checked in the factory.

[0027] 2) The lateral hinge connection and the top surface hinge connection are utilized to make the horizontal connection of the ∞-shaped steel pipes have a slight deviation, so that the lifting damage is not so easy to occur, and the continuous bridge deck device is effectively protected.

[0028] 3) From the perspective of the structure of the device of the present invention, when the main beam is subjected to bending moment, due to the force transmission effect of the connecting steel bars, the tensile force is indirectly applied to the ∞-shaped steel pipes on both sides through the connecting steel bars. Furthermore, due to the combined effect of the arch of multiple ∞-shaped steel pipes, the upper part of the steel pipes is pressed more tightly, and the lower part is freed up to avoid directly squeezing the main beam, thereby further improving the safety performance of the bridge deck continuous device. Attached Figure Description

[0029] Figure 1 A front view of an example diagram of this device;

[0030] Figure 2 Left view of an example diagram of this device;

[0031] Figure 3 This is a diagram showing the deformation of the transverse connection of this device;

[0032] Figure 4 Therefore, the stress and deformation diagram of the ∞-shaped steel pipe is shown.

[0033] Figure 5 This is a diagram illustrating the force mechanism of the device.

[0034] Explanation of reference numerals in the attached drawings: 1. Top truss reinforcement; 2. Hinge connecting steel plate; 3. Two side ∞-shaped steel pipes; 4. Middle ∞-shaped steel pipe; 5. Side connecting steel plate; 6. Hinged bolt; 7. Disc spring; 8. Hex bolt; 9. Connecting reinforcement; 10. Structural reinforcement; 11. Main beam; 12. Inverted T-shaped cap beam. Detailed Implementation

[0035] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that those skilled in the art can make several modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0036] Example 1

[0037] As one example, such as Figures 1 to 2 As shown, the continuous bridge deck structure of this inverted T-shaped cap beam simply supported beam bridge includes: top truss reinforcement 1, hinge connecting steel plate 2, ∞-shaped steel pipe, side connecting steel plate 5, hinge bolt 6, connecting reinforcement 9 and structural reinforcement 10; the main beam 11 is located on both sides of the inverted T-shaped cap beam 12; the concrete pavement layer of the bridge deck is located on top of the continuous bridge deck structure.

[0038] The steel type of the ∞-shaped steel pipe includes Q235 and Q325. A disc spring 7 is arranged on the central axis of the ∞-shaped steel pipe. The disc spring 7 can be used in series and parallel combination according to the required stress deformation. The ∞-shaped steel pipe is filled with waterproof foam material. A top chord steel bar 1 is arranged on the upper surface of the ∞-shaped steel pipe. A plurality of ∞-shaped steel pipes are connected by hexagonal bolts 8 in the longitudinal direction to form a group. A plurality of ∞-shaped steel pipes are connected by hinge connecting steel plates 2 and hexagonal bolts 8 in the transverse direction. The hinge connecting steel plate 2 is arranged on the upper surface of the ∞-shaped steel pipe. The longitudinal direction is the direction in which the main beams 11 on both sides of the inverted T-shaped roof beam 12 are connected to each other. The transverse direction is the direction perpendicular to the longitudinal direction.

[0039] The ∞-shaped steel pipe includes two side ∞-shaped steel pipes 3 and a middle ∞-shaped steel pipe 4. A group of ∞-shaped steel pipes is formed by connecting one two-side ∞-shaped steel pipe 3 to each side of the middle ∞-shaped steel pipe 4. The two-side ∞-shaped steel pipes 3 are fixedly connected to the main beams 11 on both sides of the inverted T-shaped roof beam 12 by hexagonal bolts 8.

[0040] A 4mm-thick cement mortar leveling layer is arranged on the upper surface of the main beam 11. A 2mm-thick sliding layer is arranged on the cement mortar leveling layer in the contact area between the main beam 11 and the two-side ∞-shaped steel pipes 3. The sliding layer is a polytetrafluoroethylene plate. The thickness of the cement mortar leveling layer can also be 5mm. A 1mm-thick epoxy resin glue is coated on the cement mortar leveling layer, and two layers of oil felt are laid on the epoxy resin glue to form an effective sliding layer. The sliding layer allows the ∞-shaped steel pipe to freely slide in the longitudinal direction of the bridge deck.

[0041] The two-side ∞-shaped steel pipes 3 in adjacent groups of ∞-shaped steel pipes are also connected to each other by a plurality of side hinge structures. The side hinge structure includes a side connecting steel plate 5 and a hinge bolt 6. The hinge connecting steel plate 2 includes two rotating shafts and can rotate in two directions. The maximum rotation angle is about 1°. In each group of side hinge structures, two side connecting steel plates 5 are arranged at the connection between the two-side ∞-shaped steel pipes 3 in adjacent groups of ∞-shaped steel pipes. A side connecting steel plate 5 is arranged between the two side connecting steel plates 5. The side connecting steel plate 5 in the middle is connected to the side connecting steel plates 5 on both sides by two hinge bolts 6. Each group of side hinge structures also includes two rotating shafts. The distance between the two rotating shafts of the hinge connecting steel plate 2 is consistent with the distance between the two rotating shafts of the side hinge structure, so that the integrity of the shaft rotation can be maintained when the adjacent groups of ∞-shaped steel pipes are dislocated.

[0042] The connecting steel bars 9 connect the outer bottom sections of the two-side ∞-shaped steel pipes 3. The connecting steel bars 9 are connected to the structural steel bars 10.

[0043] The ∞-shaped steel pipe is provided with bolt holes matched with hexagonal bolts 8, and the main beam 11 is also provided with corresponding bolt holes, which are all waist-shaped holes, and the length of the waist-shaped hole is twice the size of the hexagonal bolt 8, and the length direction of the waist-shaped hole is set according to the need; in the initial state, the hexagonal bolt 8 is arranged in the center of the waist-shaped hole, so that the ∞-shaped steel pipe can have a certain displacement in the length direction of the waist-shaped hole, so as to ensure that the bridge deck will not be damaged under a certain small deformation.

[0044] Example two

[0045] As another embodiment, the present embodiment proposes a seamless construction method for the bridge deck continuous structure of the inverted T-shaped bent cap simple supported beam bridge as described in the embodiment one, and for the new bridge, the construction method comprises the following steps:

[0046] Step one, process the two-side ∞-shaped steel pipe 3 and the middle ∞-shaped steel pipe 4 in the factory, and weld the top surface truss steel bars 1 on the top surface of the two-side ∞-shaped steel pipe 3 and the middle ∞-shaped steel pipe 4; set the disc spring 7 in each ∞-shaped steel pipe; and preset the waist-shaped hole on the ∞-shaped steel pipe;

[0047] Step two, place the two-side ∞-shaped steel pipe 3 on the main beam 11 at the construction site, align the waist-shaped hole on the bottom surface of the two-side ∞-shaped steel pipe 3 with the waist-shaped hole reserved on the main beam 11, and connect them with the hexagonal bolt 8; align the waist-shaped hole on the connecting surface of the middle ∞-shaped steel pipe 4 and the two-side ∞-shaped steel pipe 3, and connect them with the hexagonal bolt;

[0048] Step three, align the other ∞-shaped steel pipes transversely with the installed ∞-shaped steel pipe, set a certain interval between the adjacent two groups of ∞-shaped steel pipes in the transverse direction, connect the upper surfaces of the adjacent two groups of ∞-shaped steel pipes through the hinge connection steel plate 2 and the hexagonal bolt 8, and connect the side surfaces of the adjacent two groups of ∞-shaped steel pipes through the side surface connection steel plate 5 and the hinge bolt 6; repeat the step two and the step three until the installation of all the ∞-shaped steel pipes is completed;

[0049] Step four, fix the connecting steel bar 9 to the outer bottom section of the two-side ∞-shaped steel pipe 3, then fix the connecting steel bar 9 and the structural steel bar 10, fill the waterproof foam material in each ∞-shaped steel pipe, and finally pour the concrete pavement layer.

[0050] For the old bridge reconstruction, only the original bridge deck continuous device needs to be removed, the connecting steel bar 9 needs to be processed, and then the construction of the new bridge deck continuous device can be completed according to the above steps.

[0051] Example three

[0052] As another embodiment, the working principle of the bridge deck continuous structure of the inverted T-shaped bent cap simple supported beam bridge proposed in the embodiment one is as follows:

[0053] AsFigure 4 And Figure 5 As shown in the drawings, the ∞-shaped steel pipe of the application is placed on the sliding layer of the main beam 11, and is connected with the main beam 11 through the hexagonal bolt 8 through the waist-shaped hole, and has a certain longitudinal sliding capacity, which ensures that the bridge deck continuous device is not directly pressed when the main beam 11 is subjected to small deformation; and a certain space is left at the lower part of the ∞-shaped steel pipe, so that the bridge deck continuous device is not directly pressed when the main beam 11 is subjected to the bending moment and is uplifted and pressed downward, and the device is well protected; the force transmission path is changed due to the sliding layer and the connecting steel bar 9, the sliding layer ensures that the tensile force of the main beam 11 is not directly transmitted to the ∞-shaped steel pipe, but is indirectly transmitted to the two side ∞-shaped steel pipes 3 through the connecting steel bar 9, and the connecting steel bar 9 is located at the lower side of the two side ∞-shaped steel pipes 3, which makes the arch structure of the ∞-shaped steel pipe more stable, and the upper part of the ∞-shaped steel pipe is pressed more tightly, and due to the structure of the upper and lower double arches of the single ∞-shaped steel pipe, the positive bending moment effect is further increased.

[0054] As shown in the drawings, Figure 2 And Figure 3 The transverse connection of the application uses the hinge connecting steel plate 2 and the hexagonal bolt 8 on the top surface of the ∞-shaped steel pipe, and uses the side connecting steel plate 5 and the hinge bolt 6 between the two side ∞-shaped steel pipes 3; when subjected to transverse force, the ∞-shaped steel pipe may be uplifted due to uneven force, and if a too rigid connection is used, the effect will be increased, causing concrete damage at the far end, and the ∞-shaped steel pipe of the application adopts a relatively flexible connection in the transverse direction, so that it has a certain up-down displacement capacity, and a displacement limit is provided; the hinge connecting steel plate 2 on the top surface can rotate in both directions, and the maximum rotation angle is about 1°, which can be calculated through the concrete shear stress limit; the side connection needs to maintain the stability of the connection, while ensuring that it can rotate synchronously with the top surface, and the side hinge bolt 6 is the rotation axis of the side hinge structure, so the spacing of the side hinge bolt 6 is equal to the spacing of the two rotation axes of the top hinge connecting steel plate 2, as shown in the deformed steel pipe schematic diagram of Figure 3 The two rotate and deform together, which can effectively prevent the occurrence of self-locking phenomenon.

[0055] The bridge deck continuous structure proposed in the application can be applied to the beam joints of various other bridges, and can improve the practicality and durability of the bridge, thereby improving the service life and safety of the bridge, and playing a certain positive role in the bridge.

[0056] Compared with the prior art, the bridge deck continuity device of a certain famous bridge is a pull rod type bridge deck continuity device, although it can make the bridge deck continuous, due to poor construction and poor durability of the non-bonding material, the use effect of the pull rod type bridge deck continuity device is poor, the tension transmitted to the bridge deck continuous concrete cannot be resisted by the bridge deck continuity reinforcement and the bridge deck pavement reinforcement, and concrete cracking easily occurs at the bridge deck continuity position, causing rainwater to infiltrate and erode the lower structure of the bridge, which seriously affects the durability and driving smoothness of the bridge; replacing the bridge deck continuity device with other bridge deck continuity devices that can have partial dislocation, such as the bridge deck continuity structure provided by the application, can provide greater protection for the main girder than general devices.

Claims

1. A continuous bridge deck structure for a simply supported beam bridge with an inverted T-shaped cap beam, characterized in that, include: Top truss reinforcement (1), hinge connecting steel plate (2), ∞-shaped steel pipe, side connecting steel plate (5), hinge bolt (6), connecting reinforcement (9) and structural reinforcement (10); the main beam (11) is located on both sides of the inverted T-shaped cap beam (12); A disc spring (7) is provided on the central axis inside the ∞-shaped steel pipe, and a top truss reinforcement (1) is provided on the upper surface of the ∞-shaped steel pipe. Several ∞-shaped steel pipes are connected in the longitudinal direction by hexagonal bolts (8) to form a group. The group of ∞-shaped steel pipes are connected to each other in the transverse direction by hinge connecting steel plates (2) and hexagonal bolts (8). The hinge connecting steel plates (2) are located on the upper surface of the ∞-shaped steel pipe. The longitudinal direction is the direction in which the main beams (11) on both sides of the inverted T-shaped cap beam (12) are connected to each other, and the transverse direction is the direction perpendicular to the longitudinal direction. The ∞-shaped steel pipe includes two ∞-shaped steel pipes (3) on both sides and a middle ∞-shaped steel pipe (4). The two ∞-shaped steel pipes (3) on both sides are fixedly connected to the main beams (11) on both sides of the inverted T-shaped cap beam (12) by hexagonal bolts (8). The two ∞-shaped steel pipes (3) on both sides of the adjacent two sets of ∞-shaped steel pipes are also connected to each other by a series of side hinge structures. The side hinge structure includes side connecting steel plates (5) and hinge bolts (6). The connecting steel bar (9) connects the bottom outer section of the two sides of the ∞-shaped steel pipe (3), and the connecting steel bar (9) connects with the structural steel bar (10); The hinge connecting steel plate (2) includes two rotating shafts; in each set of side hinge structure, two side connecting steel plates (5) are respectively set at the connection of the two sides of the ∞-shaped steel pipes (3) in the two adjacent sets of ∞-shaped steel pipes. There is also a side connecting steel plate (5) between the two side connecting steel plates (5). The two ends of the side connecting steel plate (5) in the middle are connected to the side connecting steel plates (5) on both sides by two hinge bolts (6). Each set of side hinge structure also includes two rotating shafts; and the distance between the two rotating shafts of the hinge connecting steel plate (2) is the same as the distance between the two rotating shafts of the side hinge structure.

2. The continuous bridge deck structure of the simply supported beam bridge with inverted T-shaped cap beam according to claim 1, characterized in that: A set of ∞-shaped steel pipes is formed by connecting a middle ∞-shaped steel pipe (4) to each side of a two-sided ∞-shaped steel pipe (3).

3. The continuous bridge deck structure of the simply supported beam bridge with inverted T-shaped cap beam according to claim 1, characterized in that: The ∞-shaped steel pipe has bolt holes that match the hexagonal bolts (8), and the main beam (11) also has corresponding bolt holes, and all bolt holes are waist-shaped holes; in the initial state, the hexagonal bolts (8) are located in the center of the waist-shaped holes.

4. The continuous bridge deck structure of the simply supported beam bridge with inverted T-shaped cap beam according to claim 1, characterized in that: The upper surface of the main beam (11) is provided with a cement mortar leveling layer, and a sliding layer is also provided on the cement mortar leveling layer in the contact area between the main beam (11) and the two sides of the ∞-shaped steel pipe (3).

5. The continuous bridge deck structure of the simply supported beam bridge with inverted T-shaped cap beam according to claim 1, characterized in that: The inside of the ∞-shaped steel pipe is filled with waterproof foam material.

6. The continuous bridge deck structure of the simply supported beam bridge with inverted T-shaped cap beam according to claim 1, characterized in that: The concrete pavement layer of the bridge deck is located on top of the continuous bridge deck structure.

7. The seamless construction method for the continuous bridge deck structure of a simply supported beam bridge with an inverted T-shaped cap beam as described in any one of claims 1 to 6, characterized in that, Includes the following steps: Step 1: Process the two side ∞-shaped steel pipes (3) and the middle ∞-shaped steel pipe (4) in the factory, and weld the top truss steel bars (1) to the top surface of the two side ∞-shaped steel pipes (3) and the middle ∞-shaped steel pipe (4); set disc springs (7) in each ∞-shaped steel pipe; and pre-set waist-shaped holes on the ∞-shaped steel pipes; Step 2: Place the two ∞-shaped steel pipes (3) on the main beam (11) at the construction site, align the waist-shaped holes on the bottom surface of the two ∞-shaped steel pipes (3) with the waist-shaped holes reserved on the main beam (11), and connect them with hexagonal bolts (8); align the waist-shaped holes on the connecting surfaces of the middle ∞-shaped steel pipe (4) and the two ∞-shaped steel pipes (3) with hexagonal bolts; Step 3: Align the other ∞-shaped steel pipes laterally with the installed ∞-shaped steel pipes. There should be a certain gap between the two adjacent groups of ∞-shaped steel pipes laterally. The upper surfaces of the two adjacent groups of ∞-shaped steel pipes are connected by hinged steel plates (2) and hexagonal bolts (8). The sides of the two adjacent groups of ∞-shaped steel pipes are connected by side connecting steel plates (5) and hinge bolts (6). Repeat steps 2 and 3 until all ∞-shaped steel pipes are installed. Step 4: Fix the connecting steel bar (9) to the bottom outer section of the two ∞-shaped steel pipes (3), then connect and fix the connecting steel bar (9) and the structural steel bar (10), fill the inside of each ∞-shaped steel pipe with waterproof foam material, and finally pour the concrete pavement layer.

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