Swivel support with eccentric structure and its manufacturing method and application

Abstract

The present application belongs to the field of swivel bridge construction, in particular to a swivel support with eccentric structure and its manufacturing method and application. The support comprises an upper seat plate, an anchoring assembly is arranged at the edge of the upper seat plate and can be fixed with the upper swivel disc, the upper seat plate is coaxially assembled with the lower seat plate arranged below, and the abutting part of the upper and lower seat plates forms a spherical hinge; it also comprises a pre-embedded steel plate which can be anchored with the lower bearing platform through a cushion stone, a gas hole is arranged on the pre-embedded steel plate, the lower seat plate is rotationally matched with the first pin shaft arranged on the upper surface of the pre-embedded steel plate along the longitudinal direction through the lower eccentric hole, the distance between the second pin shaft and the first pin shaft is adapted to the design eccentric distance formed by the design gravity center and the geometric center of the swivel bridge, and a connecting mechanism is arranged between the upper and lower seat plates to fix them. The present application effectively solves the risk of large stress and easy cracking of the beam section caused by the large counterweight of the asymmetric structure swivel bridge in the prior art; it has the advantages of small counterweight, low cost, high efficiency and the like.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of swivel bridge construction, in particular to a swivel support with eccentric structure and its manufacturing method and application. BACKGROUND

[0002] With the construction of high-speed railways and highways, a large number of large bridges crossing rivers and railways have emerged. Due to the constraints of construction environment and traffic factors, the swivel method can better avoid the impact on other line transportation, so the swivel method construction has developed unprecedentedly.

[0003] The central swivel support is the core component of the bridge swivel system, and plays a crucial role in the bridge swivel process. With the continuous improvement of China's traffic design capacity, the structural form and span of the swivel bridge are also diverse. Some swivel bridges have different eccentric situations due to curves or asymmetric structures. When the asymmetric structure is large, a large counterweight needs to be added to the beam body. The swivel operation can only be carried out after the counterweight on both sides of the swivel structure is balanced. Since the swivel bridge is a cantilever structure, when the counterweight is large, on the one hand, it will increase the stress on the beam section and increase the beam deflection, which may lead to beam deformation or even cracking, reducing the safety of the swivel bridge and increasing the risk of swiveling. On the other hand, when the counterweight is large, more manpower and material resources are needed, which increases the counterweight cost, prolongs the counterweight period, and reduces the work efficiency.

[0004] Based on the above reasons, a swivel support is needed that can adjust the eccentricity of the swivel bridge when there is a curve or asymmetry, effectively reduce the counterweight to facilitate later weighing, counterweighting, and construction needs, and improve the safety of the swivel bridge. SUMMARY

[0005] The purpose of the present application is to provide a swivel support with eccentric structure and its manufacturing method and application, which can effectively reduce the counterweight and operation cost in the construction of swivel bridge, reduce the risk of beam deformation, and improve the work efficiency of swivel bridge construction.

[0006] The overall technical concept of the present application is:

[0007] The application discloses a swivel support with eccentric structure, which comprises an upper seat plate, an anchoring assembly arranged at the edge of the upper seat plate and capable of being fixed with an upper rotating disc, a second pin shaft arranged longitudinally and coaxially between the center of the upper seat plate and the center of a lower seat plate arranged below the upper seat plate, and a spherical hinge formed between the abutting portions of the upper seat plate and the lower seat plate; the application further comprises a pre-buried steel plate capable of being anchored with a lower bearing platform through a cushion stone, a gas hole formed in the pre-buried steel plate for exhausting and / or vibrating concrete, a first pin shaft arranged longitudinally on the upper surface of the pre-buried steel plate through an eccentric hole arranged at the lower portion of the lower seat plate, and a second pin shaft, wherein the distance between the second pin shaft and the first pin shaft is adapted to the design eccentric distance of a swivel bridge, the design eccentric distance of the swivel bridge is the distance between the design structural gravity center and the geometric center of the swivel bridge, and a connecting mechanism is arranged between the lower seat plate and the upper seat plate and capable of fixing the two.

[0008] The application further discloses a manufacturing method of the swivel support with eccentric structure.

[0009] A. The design structural gravity center and the geometric center of the swivel bridge are obtained through a data modeling method, and the distance between the design structural gravity center and the geometric center of the swivel bridge is the design eccentric distance of the swivel bridge.

[0010] B. The position of the first pin shaft and the eccentric hole adapted to the first pin shaft is obtained according to the method that the distance between the second pin shaft and the first pin shaft is adapted to the design eccentric distance of the swivel bridge.

[0011] C. The position of the first pin shaft and the eccentric hole is determined according to step B, the lower seat plate is manufactured and the eccentric hole is formed at the lower portion of the lower seat plate, the pre-buried steel plate is manufactured and the first pin shaft is formed on the upper surface of the pre-buried steel plate, and the upper seat plate and the anchoring assembly are manufactured.

[0012] The application needs to be explained that the main function of the gas hole is to make the concrete below the pre-buried steel plate more compact through the action of a vibrating rod, so as to avoid the separation phenomenon between the pre-buried steel plate and the cushion stone, and then realize the uniform stress and reliable anchoring. Since the planar slide plate, the planar sealing ring, the spherical slide plate and the spherical sealing ring are conventional components in the field, the assembly of the planar slide plate and the spherical slide plate through a working medium is known to those skilled in the art, and the manufacturing method of the above-mentioned components and the assembly process of the components and adjacent components will not be repeated.

[0013] The application further discloses an application of the swivel support with eccentric structure in swivel bridge construction.

[0014] The application further discloses the following specific technical concepts:

[0015] In order to make the cooperation between the pre-buried steel plate and the lower seat plate flexible, preferably, a friction pair composed of a stainless steel plate and a planar slide plate and a working medium for lubrication are arranged on the abutting surfaces of the pre-buried steel plate and the lower seat plate, wherein the planar slide plate is made of modified polytetrafluoroethylene or similar materials, and the working medium is made of silicone grease or similar materials.

[0016] More preferably, the outer side of the friction pair composed of the stainless steel plate and the flat sliding plate is provided with a flat sealing ring to prevent impurities from entering the sliding surface.

[0017] To facilitate the rotation between the upper seat plate and the lower seat plate, preferably, the abutting surface of the upper seat plate and the lower seat plate is provided with a spherical sliding plate and a working medium for lubrication, wherein the spherical sliding plate is made of modified polytetrafluoroethylene or similar materials, and the working medium is made of silicone grease or similar materials.

[0018] More preferably, the outer side of the spherical sliding plate is provided with a spherical sealing ring to prevent impurities from entering the sliding surface.

[0019] To facilitate the manufacture of the embedded steel plate, enhance its strength and load capacity, and facilitate more secure anchoring with the cushion stone, preferably, the embedded steel plate includes a flat steel plate and a rib plate fixed to the lower surface of the flat steel plate.

[0020] Since the main function of the connecting mechanism is to facilitate the fixation of the lower seat plate and the upper seat plate after the counterweight is weighed, thereby enabling the whole rotating body support to rotate around the first pin shaft of the embedded steel plate, and to avoid vertical rotation of the beam structure during rotation, the connecting mechanism can be detached for posture adjustment of the rotating bridge after the rotating operation of the rotating bridge is completed, therefore, preferably, the connecting mechanism is detachable.

[0021] More preferably, the connecting mechanism can adopt various common mechanical connection methods, including but not limited to one or a combination of bolts, locking pins, and welding.

[0022] The first pin shaft and the embedded steel plate are preferably structured as follows: the first pin shaft and the upper surface of the embedded steel plate are fixed by welding or integrally formed.

[0023] The application of the rotating body support with eccentric structure in the construction of the rotating bridge includes the following steps:

[0024] I. After the first pouring of the lower deck is completed, position and install the slide and level it;

[0025] II. After the installation of the slide is completed, perform the second pouring of the lower deck;

[0026] III. After the second pouring of the lower deck is completed and the design strength is reached, obtain the rotating center position of the rotating bridge according to the measurement of the measuring instrument, install the embedded steel plate so that the axis of the first pin shaft coincides with the rotating center, and pour the cushion stone after the installation of the embedded steel plate is completed.

[0027] IV, hoist eccentric support to the embedded steel plate and the eccentric hole of the lower seat plate is matched with the first pin shaft of the embedded steel plate, the design structural gravity center of the rotating bridge and its geometric center are obtained by the data modeling method, the position of the design structural gravity center is obtained by the measuring instrument, the eccentric support is installed and adjusted to make the center of the second pin shaft coincide with the design structural gravity center of the rotating bridge;

[0028] V, install the sand box and set the supporting leg above the slide, pour the upper structure of the rotating bridge, and fix the upper seat plate and the upper rotating disc at the bottom of the beam body through the anchoring assembly;

[0029] VI, after reaching the rotating condition, the beam bodies on both sides of the rotating bridge are weighed and counterweighted, the lower seat plate and the upper seat plate are fixed through the connecting mechanism after the counterweighting is completed, and the rotating operation of the rotating bridge is started.

[0030] Because the support in the application mainly involves the improvement of the process steps before the weighing and counterweighting when applied to the rotating bridge construction, the rotating center measurement in step I, step II, step III, the design structural gravity center of the rotating bridge and its geometric center obtained by the data modeling method in step IV, the design structural gravity center position obtained by the measuring instrument in step IV, and the method involved in step V are necessary process steps for completing the application, but they are known and will be known by the person skilled in the art and are often reported in the existing literature; after the weighing and counterweighting, the lower seat plate and the upper seat plate are fixed through the connecting mechanism, and the completed rotating operation of the rotating bridge is a conventional operation; the steel wire rope, winch and other structures required by the eccentric structure rotating support during the rotating operation are conventional construction methods and are often seen in the existing literature and engineering practice, which are known and will be known by the person skilled in the art, and the applicant will not repeat them here.

[0031] The applicant needs to explain that:

[0032] In the description of the application, the terms "lower", "upper surface", "outer side", "lower surface", "bottom", "both sides" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of simplifying the description of the application, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application, in addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0033] The substantial features possessed by the application and the significant technical progress achieved are:

[0034] 1. When the swing bridge is in a state of mass imbalance on both sides, the eccentricity of the structure can be adjusted by the supports. During production and manufacturing, the eccentricity is preset on the supports so that the center of the spherical surface of the support is collinear with the center of gravity of the structure. First, it eliminates the unbalanced moment caused by the asymmetry of the structural design according to the design requirements, which facilitates weighing and reduces the supporting force of the support legs, thereby improving the safety of the swing process. Second, the swing bridge rotates around the rotation center as the axis, which ensures the accuracy of the swing position of the swing bridge.

[0035] 2. This invention adjusts the eccentricity of the supports based on the eccentricity of the beam structure, eliminating the unbalanced moment caused by the beam structure design. First, it greatly reduces the weight of the counterweight required after weighing and the resulting production and construction costs. Second, it reduces the stress on the cross-section of the beam in the cantilever state, reducing the risk of beam cracking due to excessive counterweight and improving the safety of the swing bridge. Third, it effectively shortens the construction cycle of the swing bridge.

[0036] 3. The rotating support structure has a plane as the rotating surface during rotation. Firstly, it makes it easier to control the machining accuracy of the parts and can effectively avoid the problem of excessive local stress on the sliding plate caused by spherical machining errors. Secondly, using the plane between the pre-embedded steel plate and the lower seat plate as the rotating surface can significantly reduce the vertical rotation angle during rotation, reduce the support force of the support legs, and improve the safety of rotation operation.

[0037] 4. The rotating support has a simple structure. The lower load-bearing component, namely the pre-embedded steel plate, is embedded in the lower bearing platform. The technical solution of this invention facilitates installation. During the pouring process, the concrete under the pre-embedded plate is vibrated through the air holes opened on the pre-embedded plate, which can ensure that the concrete under the pre-embedded plate is dense and improve the load-bearing safety of the rotating support. Attached Figure Description

[0038] The accompanying drawings of this invention include:

[0039] Figure 1 This is a schematic diagram of the assembly structure of the rotating support with an eccentric structure and the lower bearing platform in this invention.

[0040] Figure 2 This is a schematic diagram of an eccentric rotating structure that uses a connecting mechanism to lock the upper and lower seat plates.

[0041] Figure 2A yes Figure 2 A magnified view of part A.

[0042] Figure 2B yes Figure 2 A magnified view of part B.

[0043] Figure 3 This is a structural schematic diagram of the embedded steel plate.

[0044] Figure 4 yes Figure 3 A bottom view.

[0045] Figure 5 This is a schematic diagram of the eccentric rotating support and the cooperation structure between the lower bearing and the upper turntable.

[0046] Figure 6 This is a schematic diagram illustrating the application principle of the eccentricity design of a rotating support with an eccentric structure.

[0047] Figure 7 This is a schematic diagram showing the changes in the rotating support with an eccentric structure before and after the rotation.

[0048] Figure 8 This is a schematic diagram illustrating the working principle of the eccentric rotating support in this invention when the masses on both sides of the rotating body are unequal.

[0049] Figure 9 This is a schematic diagram of the arrangement of the support legs, slide rails, lower support platform, and eccentric support in this invention.

[0050] Figure 10 This is a top view of the arrangement structure of the support legs, sand box, and eccentric support in this invention.

[0051] The reference numerals in the attached figures are as follows:

[0052] 1. Embedded steel plate; 1A. Flat steel plate; 1B. Rib plate; 2. First pin; 3. Second pin; 4. Stainless steel plate; 5. Flat sliding plate; 6. Lower seat plate; 7. Flat sealing ring; 8. Spherical sliding plate; 9. Spherical sealing ring; 10. Upper seat plate; 11. Anchoring assembly; 12. Connecting mechanism. Detailed Implementation

[0053] The accompanying drawings illustrate embodiments of the present invention. The embodiments of the present invention will be further described below with reference to the accompanying drawings, but should not be construed as limiting the present invention. The scope of protection of the present invention is determined by the content of the claims. Any equivalent technical means substitutions made in accordance with the specification do not depart from the scope of protection of the present invention.

[0054] Example

[0055] The overall structure of the present invention is shown in the figure. It is a rotating support with an eccentric structure, including an upper support plate 10. An anchoring assembly 11, which can be fixed to the upper turntable, is provided on the edge of the upper support plate 10. The center of the upper support plate 10 and the center of the lower support plate 6 located below it are longitudinally coaxially assembled via a second pin 3. The adjacent portion of the upper support plate 10 and the lower support plate 6 forms a ball joint. It also includes a pre-embedded steel plate 1 that can be anchored to the lower bearing platform via a pad stone. See [reference needed]. Figure 1 , 5 6, 9; The embedded steel plate 1 includes a flat steel plate 1A, a rib plate 1B fixed to the lower surface of the flat steel plate 1A, and air holes for venting and / or concrete vibration are provided on the embedded steel plate 1. See [reference needed] Figure 3、 4 The lower seat plate 6 is rotationally fitted with the first pin shaft 2 arranged longitudinally on the upper surface of the embedded steel plate 1 through the eccentric hole in the lower part of the lower seat plate 6, the first pin shaft 2 is fixed with the upper surface of the embedded steel plate 1 by welding or integrated forming, the axial distance between the second pin shaft 3 and the first pin shaft 2 is adapted to the design eccentricity of the rotating bridge, the design eccentricity of the rotating bridge is the distance between the design structural gravity center and the geometric center of the rotating bridge, a connecting mechanism 12 for fixing the lower seat plate 6 and the upper seat plate 10 is arranged therebetween, see Figure 1 、 2 , 5-10.

[0056] The manufacturing method of the rotating support with eccentric structure comprises the following steps:

[0057] A. The design structural gravity center and the geometric center of the rotating bridge are calculated by a data modeling method, and the distance between the design structural gravity center and the geometric center of the rotating bridge is the design eccentricity of the rotating bridge;

[0058] B. The position of the first pin shaft 2 and the eccentric hole adapted thereto is obtained according to the method that the distance between the second pin shaft 3 and the first pin shaft 2 is adapted to the design eccentricity of the rotating bridge;

[0059] C. The position of the first pin shaft 2 and the eccentric hole is determined according to step B, the lower seat plate 6 is manufactured and the eccentric hole is formed in the lower part thereof, the embedded steel plate 1 is manufactured and the first pin shaft 2 is formed on the upper surface thereof, and the upper seat plate 10 and the anchoring assembly 11 are manufactured.

[0060] The abutting surface of the embedded steel plate 1 and the lower seat plate 6 is provided with a friction pair composed of a stainless steel plate 4 and a flat sliding plate 5 and a working medium for lubrication, wherein the flat sliding plate 5 is made of modified polytetrafluoroethylene or similar material, and the working medium is made of silicone grease or similar material.

[0061] The outer side of the friction pair composed of the stainless steel plate 4 and the flat sliding plate 5 is provided with a flat sealing ring 7 to prevent impurities from entering the sliding surface.

[0062] The abutting surface of the upper seat plate 10 and the lower seat plate 6 is provided with a spherical sliding plate 8 and a working medium for lubrication, wherein the spherical sliding plate is made of modified polytetrafluoroethylene or similar material, and the working medium is made of silicone grease or similar material.

[0063] The outer side of the spherical sliding plate 8 is provided with a spherical sealing ring 9 to prevent impurities from entering the sliding surface.

[0064] The connecting mechanism 12 is connected by bolts.

[0065] The first pin shaft 2 and the upper surface of the embedded steel plate 1 are fixed by welding or integrated forming.

[0066] The application of the rotating support with eccentric structure in the construction of the rotating bridge comprises the following steps:

[0067] I. After the first pouring of the lower deck is completed, position and install the slide and level it;

[0068] II. After the installation of the slide is completed, the second pouring of the lower deck is carried out;

[0069] III. After the second pouring of the lower deck is completed and the design strength is reached, the position of the rotation center of the rotating bridge is obtained by measuring and setting out with measuring instruments, the embedded steel plate 1 is installed and the axis of the first pin shaft 2 is made to coincide with the rotation center, and after the installation of the embedded steel plate 1 is completed, the cushion stone is poured;

[0070] IV. The eccentric support is hoisted onto the embedded steel plate 1 and the eccentric hole of the lower seat plate 6 is matched with the first pin shaft 2 of the embedded steel plate 1, the design structural gravity center of the rotating bridge and its geometric center are obtained by calculation according to the data modeling method, the position of the design structural gravity center is obtained by measuring and setting out with measuring instruments according to the positional relationship between the design structural gravity center and the geometric center of the rotating bridge, the eccentric support is installed and adjusted so that the center of the second pin shaft 3 coincides with the design structural gravity center of the rotating bridge, as shown in Figures 1-2 , 5-10;

[0071] V. The sand box is installed and the supporting legs are arranged above the slide, the upper structure of the rotating bridge is poured, and the upper seat plate 10 is fixed with the upper rotating disc through the anchoring assembly 11, as shown in Figure 5 , Figure 6 , Figure 10 ;

[0072] VI. After the rotating conditions are reached, the beam bodies on both sides of the rotating bridge are weighed and counterweighted, the lower seat plate 6 is fixed with the upper seat plate 10 through the connecting mechanism 12 after the counterweighting is completed, and the rotating operation of the rotating bridge is started.

[0073] Since the quality evaluation system and related standards and specifications for the operation of the rotating bridge have not been established at present, in order to compare the technical effect difference between the eccentric support in the present application and the existing rotating support, the applicant has designed and completed the following test:

[0074] I. Test site: Hebei Baoli Engineering Equipment Co., Ltd.

[0075] II. Test personnel: Liu Kai, Li Hongling, Han Qiang, Li Jiatong

[0076] III. Test time: May 16, 2024

[0077] IV. Test instruments: asymmetric rotating bridge for test, rotating support with eccentric structure in the present application (hereinafter referred to as eccentric support), ordinary rotating support, jack, dial indicator, counterweight, etc.

[0078] V. Test steps:

[0079] 1. Model analysis. According to the drawings, the left span of the beam body is 10 meters long, and the right span is 15 meters long. The computer modeling obtains the design structure gravity center and the geometric center position of the beam body. According to the measurement, the distance between the design structure gravity center and the geometric center of the beam body is 30 cm, that is, the design eccentric distance is 30 cm.

[0080] 2. Process eccentric support. When processing the lower seat plate, first process the spherical surface, then offset 30 cm from the center line of the plane with the spherical surface center as the reference, find the first pin shaft center position, and process the pin shaft hole. Process each part of the eccentric support in turn, and prepare for installation after the eccentric support is processed.

[0081] 3. According to the measurement instrument measurement release, obtain the rotation center position of the rotating bridge, install the embedded steel plate and make the first pin shaft axis and the rotation center coincide, and pour the cushion stone after the embedded steel plate is installed.

[0082] 4. Install the eccentric support. Hoist the eccentric support to the embedded steel plate and match the eccentric hole of the lower seat plate with the first pin shaft of the embedded steel plate, and the spherical surface center should fall on the right side of the beam body. Because the geometric center and the first pin shaft center are already collinear, and the first pin shaft center position has been determined, according to the data modeling method to calculate the position relationship between the design structure gravity center and the geometric center of the rotating bridge, the design structure gravity center position is obtained by measuring and releasing the measuring instrument, and the eccentric support is installed and adjusted to make the second pin shaft center coincide with the design structure gravity center of the rotating bridge.

[0083] 5. Weighing and counterweighting. Because the eccentric support satisfies the weighing through the spherical sliding plate, and the spherical center is the design structure gravity center, although the actual construction difference will cause the design structure gravity center on both sides to be not completely symmetrical, but compared with the degree of asymmetry of the structure on both sides of the rotation center, the difference is obviously smaller. The on-site weighing result shows that the left span beam top only needs to be counterweighted by 5 tons, and the weighing and counterweighting process is completed in half a day.

[0084] 6. Replace the ordinary rotating support weighing and counterweighting. Remove the eccentric support in the invention and install the ordinary rotating support. After installation, re-weigh and counterweight, and after counterweighting 20 tons on the left side of the beam top, the rotating bridge reaches a balanced state, and the weighing and counterweighting time is 1 day.

[0085] 7. Comparative analysis of the weighing and counterweighting results, weighing and counterweighting period, etc. of the ordinary rotating support and the eccentric support in the invention.

[0086] Six, comparative analysis of test results:

[0087] Compare the eccentric support and the ordinary support counterweighting weight, and the data are as follows:

[0088] Test data table

[0089] Eccentric support Ordinary support Counterweight weight (tons) 5 20 Counterweight time (days) 0.5 1

[0090] Through the test data, compared with the common swivel support, the eccentric support can save 75% of the counterweight, shorten the construction period by 50%, greatly reduce the construction cost of the counterweight, effectively improve the problem of large beam cross-section stress and easy cracking caused by large counterweight of the asymmetric structure swivel bridge, and improve the safety of the swivel operation.

Claims

1. A swivel support with eccentric structure, comprising an upper seat plate (10) with an anchoring assembly (11) at the edge thereof, which is fixed with an upper rotating disc, the center of the upper seat plate (10) is longitudinally coaxially assembled with the center of a lower seat plate (6) arranged below the upper seat plate (10) through a second pin shaft (3), and the abutting part of the upper seat plate (10) and the lower seat plate (6) forms a spherical hinge; characterized in that The pre-embedded steel plate (1) is provided with a friction pair composed of a stainless steel plate (4) and a planar sliding plate (5) and a working medium for lubrication on the abutting surface of the pre-embedded steel plate (1) and the lower seat plate (6).

2. The swivel support with eccentric structure according to claim 1, characterized in that The planar sliding plate (5) is provided with a planar sealing ring (7) on the outer side to prevent impurities from entering the sliding surface.

3. The swivel support with eccentric structure according to claim 2, characterized in that The abutting surface of the upper seat plate (10) and the lower seat plate (6) is provided with a spherical sliding plate (8) and a working medium for lubrication.

4. The swivel support with eccentric structure according to claim 1, characterized in that The spherical sliding plate (8) is provided with a spherical sealing ring (9) on the outer side to prevent impurities from entering the sliding surface.

5. The swivel support with eccentric structure according to claim 4, characterized in that The pre-embedded steel plate (1) comprises a planar steel plate (1A) and a rib plate (1B) fixed to the lower surface of the planar steel plate (1A).

6. The swivel support with eccentric structure according to any one of claims 1 to 3, characterized in that The connecting mechanism is detachable.

7. The swivel support with eccentric structure according to claim 1, characterized in that The connecting mechanism (12) is one of a bolt, a locking pin and welding or a combination thereof.

8. The swivel support with eccentric structure according to claim 1 or 7, characterized in that The method comprises the following steps:

9. The method of claim 1 to 8, wherein A. The design structural center of gravity and the geometric center of the rotating bridge are obtained by a data modeling method, and the distance between the design structural center of gravity and the geometric center of the rotating bridge is the design eccentricity of the rotating bridge; B. The position of the first pin shaft (2) and the eccentric hole matched with the first pin shaft (2) is obtained according to the method that the distance between the axis of the second pin shaft (3) and the first pin shaft (2) is matched with the design eccentricity of the rotating bridge; C. The position of the first pin shaft (2) and the eccentric hole is determined according to step B, the lower seat plate (6) is manufactured and the eccentric hole is formed in the lower part of the lower seat plate (6), the pre-embedded steel plate (1) is manufactured and the first pin shaft (2) is formed on the upper surface of the pre-embedded steel plate (1), and the upper seat plate (10) and the anchoring assembly (11) are manufactured. The first pin shaft (2) and the upper surface of the pre-embedded steel plate (1) are fixed by welding or integrally formed.

10. The method of manufacturing a swing bearing with eccentric structure according to claim 9, characterized in that 11. The application of the rotating support with an eccentric structure in the construction of a rotating bridge according to any one of claims 1-8. The method comprises the following steps:

12. Use according to claim 11, characterized in that Ⅰ. After the first pouring of the lower supporting platform is completed, the slide is positioned and installed and leveled; Ⅱ. After the installation of the slide is completed, the second pouring of the lower supporting platform is carried out; Ⅲ. After the second pouring of the lower supporting platform is completed and the design strength is reached, the rotating center position of the rotating bridge is obtained by measuring and setting out according to a measuring instrument, the pre-embedded steel plate (1) is installed and the axis of the first pin shaft (2) is coincided with the rotating center, and the pre-embedded steel plate (1) is poured after the installation is completed. ​ IV, hoist eccentric support to pre-embedded steel plate (1) and the eccentric hole of lower seat plate (6) is matched with the first pin shaft (2) of pre-embedded steel plate (1), the design structure gravity of swivel bridge and its geometric center are obtained by data modeling method, the position of design structure gravity is obtained by measuring instrument through the position relationship between design structure gravity and its geometric center, the eccentric support is installed and adjusted to make the center of second pin shaft (3) coincide with the design structure gravity of swivel bridge; V, install sand box and set support leg above slide, pour the upper structure of swivel bridge, fix the upper seat plate (10) and upper turntable through anchoring assembly (11); VI, after reaching the swivel condition, the beam bodies on both sides of swivel bridge are weighed and counterweighted, the lower seat plate (6) and upper seat plate (10) are fixed through connecting mechanism (12) after counterweighting is completed, and the swivel operation of swivel bridge is started.

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