A high and large swivel bridge's swivel system

Abstract

The application relates to the technical field of bridge construction, and particularly discloses a rotating system of a high and large rotating bridge, which comprises a lower bearing platform, a spherical hinge assembly, an upper rotating disc, a traction assembly and a slide way. The lower bearing platform is made of concrete pouring, the spherical hinge assembly is arranged between the lower bearing platform and the upper rotating disc, the upper rotating disc is poured on the spherical hinge assembly, the traction assembly is used for driving the upper rotating disc to rotate, the slide way is horizontally arranged on the lower bearing platform and is coincident with the center of the spherical hinge assembly, eight supporting legs are arranged below the upper rotating disc, the supporting legs are located above the slide way and have a gap between the slide way, a rotating platform is formed by the spherical hinge, the supporting legs and the part connected with the upper rotating disc, the rotating platform is cylindrical, the upper rotating disc is regular octagonal, the formwork is more convenient to configure and has high utilization on the basis of guaranteeing balanced stress, the lower bearing platform is hexagonal, local stress concentration can be reduced, load distribution is uniform, and the formwork cost and difficulty can be reduced, so that effective support is provided for the rotating system and the bridge.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, specifically a rotation system for a tall rotating bridge. Background Technology

[0002] Bridge rotation construction refers to a construction method in which the bridge structure is fabricated (cast or spliced) in a location other than the design axis and then rotated into place. It can transform work done above obstacles into work done on the shore or near the ground. Depending on the direction of rotation, it can be divided into vertical rotation construction methods, horizontal rotation construction methods (referred to as vertical rotation and horizontal rotation methods, with horizontal rotation further divided into pier-top rotation and pier-bottom rotation), and methods combining horizontal and vertical rotation, with horizontal rotation being the most widely used. Bridge rotation construction is suitable for special river channels crossing deep valleys and rapid currents where hoisting is difficult, offering advantages such as reduced hoisting costs, safety, reliability, and good overall integrity. Recently, an increasing number of bridges spanning railways and highways have begun to use the rotation construction method. This method does not affect the normal transportation of railways or highways, saves a lot of timber or steel for the support structure, and is safe, reliable, and reduces the difficulty of construction. Among them, the rotation system of the horizontal rotation method mainly consists of a rotation support system and a rotation traction system. The rotation support system is usually composed of an upper turntable and a lower turntable. The upper turntable supports the rotation structure, and the lower turntable is connected to the foundation. The rotation purpose is achieved by rotating the upper turntable relative to the lower turntable. The rotation traction system is usually composed of a traction cable, a reaction seat, and continuous jacks. Steel strands wrapped around the turntable are pre-embedded in the upper turntable structure as traction cables, and the lower turntable and the reaction seat are used to install continuous jacks.

[0003] Existing technology, such as the patent with publication number CN222975705U, discloses an anti-over-rotation device for bridge rotation, including a lower platform, a lower ball joint fixedly mounted on the lower platform, and an upper ball joint that mates with the lower ball joint; an upper turntable mounted on the upper ball joint, with a scale on its side wall; an I-beam mounted on a suction cup platform, with an angle pointer on the I-beam corresponding to the scale; multiple support legs at the bottom of the upper turntable, grooves below the support legs, and slides within the grooves that mate with the support legs. The upper turntable in this design is circular, making template fabrication, installation, and disassembly difficult. Utility Model Content

[0004] In view of the shortcomings of existing technologies, the technical problem solved by this utility model is to provide a rotation system for tall rotating bridges, which solves the problem of the difficulty in installing and dismantling the upper turntable template of existing bridge rotation systems.

[0005] To solve the above problems, the technical solution adopted by this utility model is: a rotation system for a tall rotating bridge, including a lower abutment, a ball joint assembly, an upper turntable, a traction assembly, and a slide rail. The lower abutment is made of concrete. The ball joint assembly is located between the lower abutment and the upper turntable. The upper turntable is cast on the ball joint assembly. The traction assembly is used to drive the upper turntable to rotate. The slide rail is horizontally set on the lower abutment and coincides with the center of the ball joint assembly. Eight support legs are set below the upper turntable. The support legs are located above the slide rail and have gaps between them. The part where the ball joint, support legs, and upper turntable are connected is the turntable. The turntable is cylindrical. The upper turntable is a regular octagon, and the lower abutment is hexagonal.

[0006] Furthermore, the ball joint assembly includes a lower ball joint, an upper ball joint, a central pin, a steel pin, and a lower ball joint steel frame. The lower ball joint steel frame is used to support the lower ball joint. The lower ball joint is fixedly mounted on the lower bearing platform. The central pin is rotatably mounted on the center of the lower ball joint. The upper ball joint is rotatably mounted on the central pin. The concave spherical surface of the lower ball joint is provided with a plurality of polytetrafluoroethylene sliding plates.

[0007] Furthermore, the traction assembly includes a traction reaction seat, a jack reaction seat, and a traction cable. The traction reaction seat is installed on the lower bearing platform. The top of the traction reaction seat is provided with a traction slot. The traction cable is pre-embedded in the turntable. The pre-embedded end of the traction cable adopts a P-type anchor. The end of the traction cable away from the turntable passes through the traction slot and is connected to the continuous jack. The jack reaction seats are circumferentially distributed on both sides of the slide.

[0008] Furthermore, the support leg is made of two steel pipes welded onto a fan-shaped steel plate, and C50 non-shrink concrete is poured into the steel pipes.

[0009] Furthermore, the slide rail includes a slide rail frame and an annular slide rail steel plate, the annular slide rail steel plate being fixedly mounted on the slide rail frame, and the annular slide rail steel plate being made of stainless steel.

[0010] Furthermore, cooling pipes, temperature measuring lines, and temperature sensors are installed inside the lower bearing platform and the upper turntable for cooling and curing. Temperature measuring points are arranged at intervals from the center to the edge, and temperature sensors are installed at each temperature measuring point. Three temperature measuring lines are pre-embedded at each temperature measuring point to detect the temperature inside the concrete.

[0011] The beneficial effects of this solution are as follows: Compared with the prior art, the rotation system of the tall rotating bridge of this utility model, by designing the upper turntable as a regular octagon, ensures balanced force distribution, makes template configuration more convenient and has a higher utilization rate, and the lower abutment is hexagonal, which can reduce local stress concentration, distribute the load evenly, and reduce the cost and difficulty of templates, thus providing effective support for the rotation system and the bridge. Attached Figure Description

[0012] Figure 1 This is a top view of the present invention; Figure 2 This is a front view schematic diagram of the present invention; Figure 3 This is a schematic diagram of the traction cable arrangement of this utility model; Figure 4 This is a schematic diagram of the support leg structure of this utility model; Figure 5 This is a schematic diagram of the arrangement of the cooling pipes and temperature measuring points on the lower support platform of this utility model. Figure 6 This is a schematic diagram of the arrangement of the cooling pipes and temperature measuring points on the upper rotating disc of this utility model. In the diagram: 1. Lower support platform; 2. Upper turntable; 3. Slide rail; 4. Turntable; 5. Traction cable; 6. Support leg; 7. Lower ball joint; 8. Upper ball joint; 9. Center pin; 10. Traction reaction seat; 11. Jack reaction seat; 12. Cooling pipe; 13. Temperature measuring point. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Implementation, for example, attached Figures 1 to 6 The diagram shows a rotation system for a high-slaughter bridge, comprising a lower abutment 1, a ball joint assembly, an upper turntable 2, a traction assembly, and a slide rail 3. The lower abutment 1 is made of cast concrete. The ball joint assembly is positioned between the lower abutment 1 and the upper turntable 2, which is cast on top of the ball joint assembly. The traction assembly drives the upper turntable 2 to rotate. The slide rail 3 is horizontally positioned on the lower abutment 1 and coincides with the center of the ball joint assembly. The slide rail 3 includes a slide rail frame and an annular slide rail steel plate. The annular slide rail steel plate is fixedly mounted on the slide rail frame and is made of stainless steel. The center radius of the slide rail 3 is 6.5m. Eight support legs 6 are provided below the upper turntable 2. The foot 6 is made of two steel pipes welded to a fan-shaped steel plate. C50 non-shrink concrete is poured into the steel pipes. The foot 6 is located above the slide 3 and there is a gap between it and the slide 3. The part connecting the ball joint, the foot 6 and the upper turntable 2 is the turntable 4. The turntable 4 is cylindrical. The upper turntable 2 is a regular octagon. Each side corresponds to the installation position of a foot 6, which is conducive to the even distribution of the foot 6. The force on the regular octagonal upper turntable 2 is as balanced as that on a circle. Compared with a circle, the regular octagonal template is more convenient to configure and has a higher utilization rate. The lower support platform 1 is hexagonal, which can reduce local stress concentration, distribute the load evenly, and reduce the cost and difficulty of the template.

[0015] The ball joint assembly includes a lower ball joint 7, an upper ball joint 8, a central pin 9, a steel pin, and a steel frame for the lower ball joint. The steel frame supports the lower ball joint 7, which is fixedly mounted on the lower support platform 1. The central pin 9 is rotatably mounted on the center of the lower ball joint 7, and the upper ball joint 8 is rotatably mounted on the central pin 9. The concave spherical surface of the lower ball joint 7 is provided with several polytetrafluoroethylene (PTFE) sliding plates. The traction assembly includes a traction reaction seat 10, a jack reaction seat 11, and a traction cable 5. The traction reaction seat 10 is mounted on the lower support platform 1, and a traction slot is provided on the top of the traction reaction seat 10. The traction cable 5 is pre-embedded in the turntable 4, and the pre-embedded end of the traction cable 5 adopts a P-type anchor. The end of the traction cable 5 away from the turntable 4 passes through the traction slot and connects to the connecting plate. The jacks are connected to pull the turntable 4 to rotate, thus realizing the rotation of the rotation system. Jack reaction seats 11 are circumferentially distributed on both sides of the slide rail 3 to control the start, stop, and fine-tuning of the rotation system. There are eight sets of jack reaction seats 11, with two sets of jack reaction seats 11 on the inner and outer sides of the slide rail 3. Cooling pipes 12, temperature measuring wires, and temperature sensors are installed inside the lower support platform 1 and the upper turntable 2 for cooling and curing. Temperature measuring points 13 are arranged at intervals from the center to the edge, and each temperature measuring point 13 is equipped with a temperature sensor. Three temperature measuring wires are pre-embedded at each temperature measuring point 13 to detect the temperature inside the concrete, preventing excessive temperature differences between the inside and outside of the concrete from causing cracks, and controlling the temperature difference between the inside and outside of the concrete to within 20℃. The specific implementation process is as follows: The lower foundation 1 is constructed using a two-stage pouring method. The first pouring height is controlled at the bottom elevation of the lower ball hinge installation frame. The second pouring reaches the designed top elevation of the foundation. Before pouring, reinforcing bars are tied and cooling pipes 12, temperature measuring wires, and temperature sensors are installed. Since the lower foundation 1 is hexagonal, a flat formwork is sufficient. After the first pour, the lower ball hinge frame and slide rail frame are installed, along with the annular slide rail steel plate and lower ball hinge 7. After tying the remaining reinforcing bars of the lower foundation 1, the reinforcing bars for the traction reaction seat 10 and jack reaction seat 11 are pre-embedded. The lower... The cooling pipes 12, temperature measuring wires and temperature sensors on the upper part of the foundation 1 are installed. After the template is installed, the second concrete pour is carried out. After pouring, the cooling pipes 12 are circulated with water for curing. The template of the lower foundation 1 is removed. The reinforcing bars of the traction reaction seat 10 and the jack reaction seat 11 are tied. After the template is installed and reinforced, the concrete is poured. After pouring, the template is removed and cured. The construction of the lower foundation 1, traction reaction seat 10 and jack reaction seat 11, as well as the installation of the annular slide steel plate and the lower ball hinge 7 are completed. The lower foundation 1 is equipped with five layers of cooling pipes 12, with two loop units in each layer. Install the center pin 9 on the lower ball joint 7, install the PTFE slide, apply PTFE grease between the PTFE slides, then install the upper ball joint 8. Apply a layer of PTFE grease to the convex spherical surface of the upper ball joint 8, then gently place the upper ball joint 8 onto the lower ball joint 7, aligning it with the center pin 9. Run the upper and lower ball joints together by alternating clockwise and counterclockwise rotation of the upper ball joint for 5 minutes each time. The total running-in time should not be less than 4 hours. Clean off any excess grease. After the upper ball joint 8 is precisely positioned, lock it in place with a steel pin. The ball joint assembly is made of 190,000 kN steel ball joint with a spherical projection diameter of 4.2 m. The support legs 6 and sandbox are installed. The bottom of the support legs 6 is connected to... A 20mm gap is reserved in the steel plate of the annular slide, which is filled with steel pads. After the construction of the upper turntable 2 is completed, the pads are removed. The sand box serves as a temporary support for the bottom membrane support of the upper turntable 2. After the bottom membrane of the upper turntable 2 is installed, the steel bars of the upper turntable 2 are tied, and the cooling pipes 12, temperature measuring wires and temperature sensors are laid. The upper turntable 2 is equipped with three layers of cooling pipes 12, with one loop unit in each layer. The traction cable 5 is preset at the turntable 4 and anchored. After that, the template of the upper turntable 2 is installed and poured to complete the installation of the upper ball joint 8 and the traction cable 5. Since the upper turntable 2 is a regular octagon, a flat template can be used, which is convenient for installation and disassembly. After the traction cable 5 is passed through the traction reaction seat 10 and connected to the continuous jack, the construction of the rotation system is completed.

[0016] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A rotation system for a high-slaughter bridge, comprising a lower abutment, a ball joint assembly, an upper turntable, a traction assembly, and a slide rail, wherein the lower abutment is made of cast concrete, the ball joint assembly is disposed between the lower abutment and the upper turntable, the upper turntable is cast on the ball joint assembly, and the traction assembly is used to drive the upper turntable to rotate, characterized in that: The slide is horizontally set on the lower support platform and coincides with the center of the ball joint assembly. Eight support legs are set below the upper turntable. The support legs are located above the slide and have a gap with the slide. The part connecting the ball joint, support legs and the upper turntable is the turntable. The turntable is cylindrical. The upper turntable is a regular octagon and the lower support platform is hexagonal.

2. The rotation system for a tall rotating bridge according to claim 1, characterized in that: The ball joint assembly includes a lower ball joint, an upper ball joint, a central pin, a steel pin, and a steel frame for the lower ball joint. The steel frame for the lower ball joint supports the lower ball joint. The lower ball joint is fixedly mounted on the lower bearing platform. The central pin is rotatably mounted at the center of the lower ball joint. The upper ball joint is rotatably mounted on the central pin. The concave spherical surface of the lower ball joint is provided with several polytetrafluoroethylene (PTFE) sliding plates.

3. The rotation system for a tall rotating bridge according to claim 1, characterized in that: The traction assembly includes a traction reaction seat, a jack reaction seat, and a traction cable. The traction reaction seat is installed on the lower bearing platform. The top of the traction reaction seat is provided with a traction slot. The traction cable is pre-embedded in the turntable. The pre-embedded end of the traction cable adopts a P-type anchor. The end of the traction cable away from the turntable passes through the traction slot and connects to the continuous jack. The jack reaction seats are circumferentially distributed on both sides of the slide.

4. The rotation system for a tall rotating bridge according to claim 1, characterized in that: The support leg is made of two steel pipes welded onto a fan-shaped steel plate, and C50 non-shrink concrete is poured into the steel pipes.

5. The rotation system for a tall rotating bridge according to claim 1, characterized in that: The slide rail includes a slide rail frame and an annular slide rail steel plate. The annular slide rail steel plate is fixedly installed on the slide rail frame and is made of stainless steel.

6. The rotation system for a tall rotating bridge according to claim 1, characterized in that: Cooling pipes, temperature measuring wires, and temperature sensors are installed inside the lower bearing platform and upper turntable for cooling and curing. Temperature measuring points are arranged at intervals from the center to the edge, and temperature sensors are installed at each temperature measuring point. Three temperature measuring wires are pre-embedded at each temperature measuring point to detect the temperature inside the concrete.

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