Processing method of bridge swivel multi-roller turntable structure

Abstract

A processing method of a bridge swivel multi-roller turntable structure, comprising the following steps: S1, the lower bearing platform pouring, after the pile foundation construction is completed, the reinforcement is bound according to the design size to make the framework, after the formwork support is completed, the concrete is poured, after pouring is completed, the top surface of the lower bearing platform is handled by using the whole scraping equipment;S2, roller body prefabrication, the roller body concrete prefabrication is carried out by using the roller body mold;S3, roller body and upper trolley installation, the upper trolley is fixed on the lower bearing platform according to the design drawing through the positioning structure, and the prefabricated roller body is installed on the lower end of the corresponding upper trolley through the roller shaft;S4, upper turntable pouring;S5, upper structure construction;S6, remove the support structure;S7, swivel construction;S8, seal the disc, after the bridge is closed, the disc sealing construction is carried out, and the gap between the upper turntable and the lower bearing platform is poured with disc sealing material.

Description

Technical Field

[0001] This application relates to the field of bridge construction application technology, and more specifically, to a processing method for a bridge rotating multi-roller turntable structure. Background Technology

[0002] In the field of bridge construction, some bridges cannot be erected or hoisting machinery can be operated due to site constraints. In such cases, the superstructure is often placed by rotating the bridge. In recent years, with the increasing maturity of bridge rotation technology, the proportion of bridges constructed using planar rotation, with existing operational railway bridges as a typical example, has been increasing.

[0003] The basic principle of bridge rotation is as follows: First, prefabricate half of the bridge using simple supports. Then, using the bridge structure itself as the rotating body, employ machinery to rotate the two half-bridges to their respective bridge locations and assemble them into a single bridge. The rotating mechanism typically uses ball joints, which are divided into inner and outer joints. The outer joint is connected to the pier and remains stationary; the inner joint is connected to the bridge structure and can rotate relative to the outer joint. External steel strands are connected to internal movable ball joints. Pulling the steel strands causes the inner joint to rotate, thus completing the bridge rotation.

[0004] The currently used ball joint structure, such as the rotating ball joint support disclosed in CN217710308U, includes an upper body arranged from top to bottom, an upper ball joint and a lower ball joint rotatably connected by a rotating pin, an embedded plate, and a lower body; wherein: the embedded plate is provided with a positioning sleeve that protrudes downward and is inserted into the lower body, the upper end of the rotating pin is inserted into the upper ball joint, and the lower end passes through the lower ball joint and extends into the positioning sleeve and is rotatably connected to the lower ball joint and / or the positioning sleeve; the lower ball joint is fixed to the lower body through the embedded plate by a locking mechanism.

[0005] With increasingly stringent requirements for bridge construction quality, schedule, and safety, traditional ball joints have revealed some insurmountable drawbacks in bridge rotation applications, summarized as follows:

[0006] 1.1 The construction process of the ball joint structure is complicated, with multiple layers of concrete and a long pouring cycle, which is not conducive to the control of the construction period.

[0007] 2.2. In traditional ball joints, the space between the upper and lower balls is filled with lubricating material. After the disc is closed, the space between the upper and lower balls within the radius of the ball joint cannot be completely sealed, which affects the structural stability to some extent.

[0008] 3. Traditional ball joints rely on sliding friction on the rotating surface, which is highly dependent on the lubricating material and the smoothness of the ball joint contact surface, resulting in high manufacturing, installation, and usage costs.

[0009] 4. Traditional ball joints are single-interface supports, resulting in a low structural stability coefficient.

[0010] Therefore, those skilled in the art need to improve the existing ball joint structure to overcome the aforementioned technical problems. Summary of the Invention

[0011] The main objective of this application is to provide a processing method for a multi-roller turntable structure for bridge rotation, which solves the inherent problems of complex construction procedures, long cycle, high cost and incomplete sealing of traditional ball joints, thereby achieving high construction efficiency, low risk and reduced cost.

[0012] To achieve the above objectives, firstly, this application provides a method for processing a bridge rotating multi-roller turntable structure, comprising the following steps:

[0013] S1. Lower foundation pouring: After the pile foundation construction is completed, the steel reinforcement is tied and the skeleton is made according to the design dimensions. After the formwork support is completed, the concrete is poured. After the pouring is completed, the top surface of the lower foundation is treated using a scraper. The scraper includes a bracket detachably connected to the top of the formwork of the lower foundation, a drive rod rotatably set on the bracket, and a drive mechanism fixedly connected to the top of the drive rod. A scraper assembly is fixedly connected to the bottom of the drive rod. The scraper assembly includes a circular positioning ring and several scrapers fixedly connected radially between the inner side of the circular positioning ring and the end of the drive rod. The scrapers are inclined. After the scraper is removed, curing is performed.

[0014] S2. Roller body prefabrication: Roller body concrete is prefabricated using roller body molds. After the roller body molds are assembled, concrete is poured. After the pouring is completed and the shape is set, the roller body molds are removed for curing.

[0015] S3. Installation of the rotating roller and the upper rotating frame: The upper rotating frame is fixed on the lower support platform according to the design drawings through the positioning structure, and the prefabricated rotating roller is installed on the lower end of the corresponding upper rotating frame through the roller shaft;

[0016] S4. Upper turntable pouring: The bottom formwork of the upper turntable is fixed to the top surface of the lower support platform by setting a support structure. After the steel bars are installed and the formwork is supported on the bottom formwork according to the design standards, concrete is poured. After curing, the positioning structure used for positioning the upper turntable is removed.

[0017] S5. Construction of the superstructure: Construction and maintenance of the superstructure are carried out on the upper turntable.

[0018] S6. Remove the supporting structure. After the construction of the superstructure is completed, remove the supporting structure after cleaning the debris on the top surface of the lower foundation.

[0019] S7. Rotation construction: using a traction system to rotate and close the bridge.

[0020] S8. Sealing plate: After the bridge is closed, sealing plate construction is carried out, and sealing plate material is poured into the gap between the upper turntable and the lower abutment.

[0021] A further improvement is that the support structure includes jacks set at multiple points and supporting steel sections.

[0022] A further improvement is that the sealing material is micro-expansion concrete.

[0023] A further improvement is that the tilt angle of the rotating roller is consistent with the tilt angle of the top surface of the lower support.

[0024] A further improvement is that a limiting structure is provided between the upper rotating frame and the lower support platform.

[0025] A further improvement is that a circular groove is provided on the upper surface of the lower support platform, and the limiting structure includes a first guide wheel rotatably disposed on the side of each upper rotating frame, the first guide wheel cooperating with the inner sidewall of the circular groove.

[0026] A further improvement is that the limiting structure also includes a second guide wheel rotatably disposed at the bottom of the upper rotating frame, the second guide wheel cooperating with the bottom surface of the circular groove.

[0027] A further improvement is that the upper rotating frame is made of metal, and the top of the upper rotating frame is provided with several T-shaped reinforcing connectors, which are embedded in the upper rotating disk.

[0028] A further improvement is that the drive mechanism is an operating handle or a drive motor fixedly mounted on the top of the drive rod.

[0029] A further improvement is that the roller mold includes a base plate, a mold core, a first mold shell and a second mold shell detachably connected to the base plate, the first mold shell and the second mold shell are detachably connected, the diameter of the mold core is larger than the diameter of the roller shaft that cooperates with the roller body, and the first mold shell and the second mold shell are spliced ​​together to form a conical forming cavity.

[0030] This invention provides a processing method for a multi-roller turntable structure for bridge rotation. Compared with existing technologies, this method offers several advantages: it is convenient to construct, stable in use, economical, convenient, stable, and reliable. Furthermore, the resulting rotating structure exhibits outstanding performance. Compared to traditional ball joints, it offers the following advantages: simpler procedures, shorter pouring cycle, and better schedule control; no lubrication or filling between rotating systems, thorough sealing, and improved structural safety after bridge completion; optimization of the overall sliding friction of the traditional ball joint's rotating surface into rotational friction, significantly reducing the interface friction coefficient and lowering the required traction equipment type; and transformation of the traditional single-interface support of the ball joint into multi-point support during rotation, increasing structural stability. Attached Figure Description

[0031] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings:

[0032] Figure 1 This is a schematic diagram of the turntable structure (Example 1);

[0033] Figure 2 This is a schematic diagram of the upper rotating frame;

[0034] Figure 3 yes Figure 2 Enlarged view of point A;

[0035] Figure 4 This is a schematic diagram of the lower support platform;

[0036] Figure 5 This is a top view of the roller relative to the lower support platform;

[0037] Figure 6 This is a schematic diagram of the rotating roller;

[0038] Figure 7 This is a schematic diagram of the scraping equipment;

[0039] Figure 8 This is a top view of the scraping equipment;

[0040] Figure 9 This is a schematic diagram of the roller mold.

[0041] The components include: 1. Lower support platform; 2. Upper turntable; 3. Upper rotating frame; 4. Rotating roller; 5. Roller shaft; 6. T-shaped reinforcing connector; 7. Circular groove; 8. First guide wheel; 9. Second guide wheel; 10. Sealing concrete; 11. Support; 12. Drive rod; 13. Motor; 14. Circular positioning ring; 15. Scraper; 16. Base plate; 17. First mold shell; 18. Second mold shell; 19. Mold core. Detailed Implementation

[0042] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0043] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0044] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0045] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0046] In addition, the term "multiple" should mean two or more.

[0047] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0048] like Figures 7-9 As shown, a method for processing a multi-roller turntable structure for bridge rotation includes the following steps:

[0049] S1. Lower foundation 1 is poured. After the pile foundation construction is completed, the steel reinforcement is tied and the skeleton is made according to the design dimensions. After the formwork support is completed, the concrete is poured. After the pouring is completed, the top surface of the lower foundation 1 is treated using a scraping device. The scraping device includes a bracket 11 detachably connected to the top of the formwork of the lower foundation 1, a drive rod 12 rotatably set on the bracket 11, and a drive mechanism fixedly connected to the top of the drive rod 12. The bottom of the drive rod 12 is fixedly connected to a scraper 15 assembly. The scraper 15 assembly includes a circular positioning ring 14 and several scrapers 15 fixedly connected radially between the inner side of the circular positioning ring 14 and the end of the drive rod 12. The scrapers 15 are inclined. After the scraping device is removed, curing is performed. The drive mechanism is an operating handle or a drive motor 13 fixedly set on the top of the drive rod 12. The scraping can be performed manually or electrically.

[0050] S2. Roller body prefabrication: Roller body concrete prefabrication is carried out using roller body molds. After the roller body molds are assembled, concrete is poured. After the pouring is completed and the shape is set, the roller body molds are removed for curing. The roller body molds include a base plate 16, a mold core 19, a first mold shell 17 and a second mold shell 18 detachably connected to the base plate 16. The first mold shell 17 and the second mold shell 18 are detachably connected. The diameter of the mold core 19 is larger than the diameter of the roller shaft 5 that cooperates with the roller body. The first mold shell 17 and the second mold shell 18 are spliced ​​together to form a conical forming cavity.

[0051] S3, the rotating roller 4 and the upper rotating frame 3 are installed. The upper rotating frame 3 is fixed to the lower support 1 according to the design drawings through the positioning structure, and the prefabricated rotating roller 4 is installed on the lower end of the corresponding upper rotating frame 3 through the roller shaft 5.

[0052] S4. Casting of the upper turntable 2: The bottom formwork of the upper turntable 2 is fixed to the top surface of the lower support platform 1 by setting a support structure. After the steel bars are installed and the formwork is supported on the bottom formwork according to the design standards, concrete is poured. After curing, the positioning structure used for positioning the upper turntable 3 is removed. Specifically, the support structure includes jacks set at multiple points and support steel.

[0053] S5. Construction of the superstructure: Construction and maintenance of the superstructure are carried out on the upper turntable 2.

[0054] S6. Remove the supporting structure. After the construction of the superstructure is completed, clean up the debris on the top surface of the lower foundation 1 and then remove the supporting structure.

[0055] S7. Rotation construction: using a traction system to rotate and close the bridge.

[0056] S8. Sealing plate: After the bridge is closed, sealing plate construction is carried out. Sealing plate material is poured into the gap between the upper turntable 2 and the lower abutment 1. The sealing plate material is micro-expansion concrete.

[0057] like Figures 1-6 As shown, the completed bridge rotating multi-roller turntable structure includes a lower support 1 fixedly connected to the bridge pier, an upper turntable 2 fixedly connected to the bridge, and a rotating structure disposed between the lower support 1 and the upper turntable 2. The rotating structure includes a circular groove 7 formed on the upper surface of the lower support 1 and multiple rotating rollers 4 rotatably disposed on the upper turntable 2. The bottom surface of the circular groove 7 is a concave conical surface, and the rotating rollers 4 are conical. The inclination angle of the rotating rollers 4 is the same as the inclination angle of the bottom surface of the circular groove 7. The axis of the multiple rotating rollers 4 extends radially along the circular groove 7. The lower support 1 is disc-shaped.

[0058] By setting several rotating rollers 4, specifically eight rotating rollers 4, that is, eight rotating rollers 4 are evenly distributed along the circumference of the circular groove 7, so that when rotating, the rotating rollers 4 directly rotate along the concave conical surface of the circular groove 7, changing the original overall arc surface rotation friction of the ball joint to the rolling friction of each rotating roller 4 relative to the conical surface, thereby reducing the friction. Not only is the friction reduced, but it also eliminates the need for lubricating materials and the smoothness of the ball joint contact surface, reducing the amount of lubricating materials, making construction more convenient, and reducing installation costs.

[0059] Wherein: the upper turntable 2, the lower support platform 1, and the rotating roller 4 are all made of concrete, and the upper rotating frame 3 and the roller shaft 5 are all made of metal.

[0060] To achieve a more compact structure and facilitate the installation of the rotating rollers 4, several upper rotating frames 3 are fixedly installed at the bottom of the upper turntable 2. The rotating rollers 4 correspond one-to-one with the upper rotating frames 3. A cylindrical roller shaft 5 is fixedly installed at the bottom of each upper rotating frame 3, and the rotating rollers 4 are sleeved on the roller shaft 5. The installation method between the upper rotating frame 3 and the upper turntable 2 is that the upper rotating frame 3 and the upper turntable 2 are pre-embedded, that is, when the upper turntable 2 is poured, the upper rotating frame 3 is directly poured. In addition, to ensure the stability of the connection between the two, multiple T-shaped reinforcing connectors 6 are provided at the top of each upper rotating frame 3. The T-shaped reinforcing connectors 6 are embedded in the upper turntable 2. The multiple T-shaped reinforcing connectors 6 not only strengthen the upper rotating frame 3 itself, but also improve the connection between it and the upper turntable 2 during pre-embedding pouring.

[0061] To ensure the stability of the entire turntable structure, a limiting structure is provided between the upper rotating frame 3 and the lower support platform 1. Specifically, the limiting structure includes a first guide wheel 8 rotatably disposed on the side of each upper rotating frame 3. The first guide wheel 8 cooperates with the inner wall of the circular groove 7. Therefore, during rotation, the first guide wheel 8 rolls along the inner wall of the circular groove 7, which not only provides good stability but also reduces friction. To further enhance stability, the limiting structure also includes a second guide wheel 9 rotatably disposed at the bottom of the upper rotating frame 3. The second guide wheel 9 cooperates with the bottom surface of the circular groove 7. Although the bottom surface of the circular groove 7 is conical, the width of the second guide wheel 9 is small. Its main function is not only to guide the rotation but also to provide some support to the bottom surface, reducing the direct force on the concrete-poured roller 4 and effectively preventing damage to the roller 4.

[0062] It should be noted that the rotating roller 4 is directly sleeved on the roller shaft 5, rather than being fixed to the roller shaft 5. This allows the rotating roller 4 to move around on the roller shaft 5 to a certain extent, preventing jamming.

[0063] In addition, after the bridge is rotated as a whole, the gap between the upper turntable 2 and the lower abutment 1 needs to be filled with sealing concrete 10 to fix and seal the upper turntable 2 and the lower abutment 1, thereby ensuring the overall stability of the bridge.

[0064] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for processing a multi-roller turntable structure for bridge rotation, characterized in that, Includes the following steps: S1. Lower foundation pouring: After the pile foundation construction is completed, the steel reinforcement is tied and the skeleton is made according to the design dimensions. After the formwork support is completed, the concrete is poured. After the pouring is completed, the top surface of the lower foundation is treated using a scraper. A circular groove is opened on the upper surface of the lower foundation. The scraper includes a bracket detachably connected to the top of the formwork of the lower foundation, a drive rod rotatably set on the bracket, and a drive mechanism fixedly connected to the top of the drive rod. A scraper assembly is fixedly connected to the bottom of the drive rod. The scraper assembly includes a circular positioning ring and several scrapers fixedly connected radially between the inner side of the circular positioning ring and the end of the drive rod. The scrapers are inclined. After the scraper is removed, it is cured. The bottom surface of the circular groove is a concave conical surface. S2. Roller prefabrication: The roller body concrete is prefabricated using a roller body mold. After the roller body mold is assembled, concrete is poured. After the pouring is completed and the shape is set, the roller body mold is removed for curing. The roller is conical. S3. Installation of the rotating roller and the upper rotating frame: The upper rotating frame is fixed on the lower support platform according to the design drawings through the positioning structure, and the prefabricated rotating roller is installed on the lower end of the corresponding upper rotating frame through the roller shaft; S4. Upper turntable pouring: The bottom formwork of the upper turntable is fixed to the top surface of the lower support platform by setting a support structure. After the steel bars are installed and the formwork is supported on the bottom formwork according to the design standards, concrete is poured. After curing, the positioning structure used for positioning the upper turntable is removed. S5. Construction of the superstructure: Construction and maintenance of the superstructure are carried out on the upper turntable. S6. Remove the supporting structure. After the construction of the superstructure is completed, remove the supporting structure after cleaning the debris on the top surface of the lower foundation. S7. Rotation construction: using a traction system to rotate and close the bridge. S8. Sealing plate: After the bridge is closed, sealing plate construction is carried out, and sealing plate material is poured into the gap between the upper turntable and the lower abutment.

2. The processing method of a bridge rotating multi-roller turntable structure as described in claim 1, characterized in that: The support structure includes jacks set at multiple points and supporting steel sections.

3. The processing method of a bridge rotating multi-roller turntable structure as described in claim 1, characterized in that: The sealing material is micro-expansion concrete.

4. The processing method of a bridge rotating multi-roller turntable structure as described in claim 1, characterized in that: The tilt angle of the roller is the same as the tilt angle of the top surface of the lower support.

5. The processing method of a bridge rotating multi-roller turntable structure as described in claim 4, characterized in that: A limiting structure is also provided between the upper rotating frame and the lower support platform.

6. The processing method of a bridge rotating multi-roller turntable structure as described in claim 5, characterized in that: The limiting structure includes a first guide wheel rotatably disposed on the side of each of the upper rotating frames, the first guide wheel cooperating with the inner sidewall of the circular groove.

7. The processing method of a bridge rotating multi-roller turntable structure as described in claim 6, characterized in that: The limiting structure also includes a second guide wheel rotatably disposed at the bottom of the upper rotating frame, the second guide wheel cooperating with the bottom surface of the circular groove.

8. The processing method of a bridge rotating multi-roller turntable structure as described in claim 1, characterized in that: The upper rotating frame is made of metal, and the top of the upper rotating frame is provided with several T-shaped reinforcing connectors, which are embedded in the upper rotating plate.

9. The processing method of a bridge rotating multi-roller turntable structure as described in claim 1, characterized in that: The driving mechanism is an operating handle or a drive motor that is fixedly mounted on the top of the driving rod.

10. The processing method of a bridge rotating multi-roller turntable structure as described in claim 1, characterized in that: The roller mold includes a base plate, a mold core, a first mold shell and a second mold shell detachably connected to the base plate. The first mold shell and the second mold shell are detachably connected. The diameter of the mold core is larger than the diameter of the roller shaft that cooperates with the rotating roller. The first mold shell and the second mold shell are spliced ​​together to form a conical forming cavity.

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