Floating slab ballast bed three-dimensional steel wire vibration isolation system with two defense lines

Abstract

The invention discloses a floating slab ballast bed three-dimensional steel wire vibration isolation system with two defense lines, which comprises a primary steel wire vibration isolation device, a secondary steel wire vibration isolation device and a three-way transmission device, and the primary steel wire vibration isolation device and the secondary steel wire vibration isolation device are connected through the three-way transmission device. The primary steel wire vibration isolation device is used for bearing a floating slab track bed and conducting vibration reduction on the floating slab track bed, and the secondary steel wire vibration isolation device is installed in the primary steel wire vibration isolation device and used for improving the bearing capacity and vibration reduction performance of the primary steel wire vibration isolation device on the floating slab track bed. The three-way transmission device provides three-way vibration isolation capacity for the primary steel wire vibration isolation device and the secondary steel wire vibration isolation device. Under the combined action of the first-stage steel wire vibration isolation device, the second-stage steel wire vibration isolation device and the three-way transmission device, the vibration isolation system has the large bearing capacity, the good vibration isolation effect, the high safety reserve and the high adaptability to an application main body and loads at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of engineering vibration isolation, and in particular to a floating slab track bed three-dimensional steel wire vibration isolation system with two lines of defense. Background Art

[0002] With the continuous development of the engineering construction industry, architectural features have gradually developed into large-scale, diversified and complex. Once buildings with such characteristics develop to a certain scale, the building structure is usually considered, designed and developed together with transportation projects (especially large-scale transportation projects such as subways). Therefore, construction projects also have an increasing demand for controlling vibrations caused by factors such as subway operation, that is, the demand for vibration isolation is also increasing.

[0003] At present, the most common control solution for subway vibration is the steel spring floating plate roadbed vibration isolation solution. However, the steel spring is limited by its height, resulting in limited vibration isolation effect, and the energy consumption capacity of the steel spring itself is relatively weak. Existing vibration isolation devices, such as rubber vibration isolation systems, friction pendulum systems, and steel wire vibration absorbers, have been used in vibration isolation projects, but they all encounter problems such as unclear vibration isolation effects or insufficient bearing capacity. At the same time, the safety reserves of these devices themselves are relatively low, and they are not adaptable to the application subjects and loads.

[0004] In summary, there is a huge contradiction between the existing vibration isolation technology, the large bearing capacity requirement and the obvious vibration isolation effect. The contradiction between the two limits the further development of vibration isolation technology, and thus limits the further development of current subway vibration control technology. Therefore, there is an urgent need to develop a floating slab roadbed vibration isolation device that has a large bearing capacity, good vibration isolation effect, a high safety reserve and strong adaptability to the application subject and load. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a three-dimensional steel wire vibration isolation system for a floating slab track bed with two lines of defense, which has a large bearing capacity, good vibration isolation effect, a high safety reserve and strong adaptability to application subjects and loads.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A three-dimensional steel wire vibration isolation system for a floating slab track bed with two lines of defense, characterized by comprising:

[0008] The first-stage steel wire vibration isolation device is used to support the floating slab ballast and reduce the vibration of the floating slab ballast;

[0009] Secondary steel wire vibration isolation device, the secondary steel wire vibration isolation device is installed in the primary steel wire vibration isolation device, and the secondary steel wire vibration isolation device is used to increase the bearing capacity and vibration reduction performance of the primary steel wire vibration isolation device on the floating slab track bed;

[0010] The three-way transmission device is connected with the primary steel wire vibration isolation device and the secondary steel wire vibration isolation device through the three-way transmission device, and the three-way transmission device provides three-way vibration isolation capability for the primary steel wire vibration isolation device and the secondary steel wire vibration isolation device.

[0011] Furthermore, when the vibration isolation system is subjected to a small vertical load, the first-stage steel wire vibration isolation device is subjected to a force to produce a vertical downward displacement, and the first-stage steel wire vibration isolation device exerts a nonlinear energy dissipation effect to reduce the vibration of the floating slab track bed;

[0012] When the vibration isolation system is subjected to a large vertical load, the first-stage steel wire vibration isolation device is first subjected to force and produces a vertical downward displacement. When the vertical downward displacement exceeds a certain range, the first-stage steel wire vibration isolation device drives the secondary steel wire vibration isolation device to move vertically downward through the three-way transmission device. The first-stage steel wire vibration isolation device and the secondary steel wire vibration isolation device jointly exert a nonlinear energy dissipation effect to reduce the vibration of the floating slab track bed.

[0013] Furthermore, when the vibration isolation system is subjected to a small horizontal load, the first-stage steel wire vibration isolation device is subjected to a horizontal displacement, and the first-stage steel wire vibration isolation device exerts a nonlinear energy dissipation effect to reduce the vibration of the floating slab track bed;

[0014] When the vibration isolation system is subjected to a large horizontal load, the first-stage steel wire vibration isolation device is first subjected to force and produces horizontal displacement. When the horizontal displacement exceeds a certain range, the first-stage steel wire vibration isolation device drives the secondary steel wire vibration isolation device to move horizontally through the three-way transmission device. The first-stage steel wire vibration isolation device and the secondary steel wire vibration isolation device jointly exert a nonlinear energy dissipation effect to reduce the vibration of the floating slab track bed.

[0015] Furthermore, when the vibration isolation system is subjected to a small steering load, the first-stage steel wire vibration isolation device is subjected to a force to produce a horizontal displacement in the steering direction, and the first-stage steel wire vibration isolation device exerts a nonlinear energy dissipation effect to reduce the vibration of the floating slab track bed;

[0016] When the vibration isolation system is subjected to a large steering load, the first-stage steel wire vibration isolation device is first subjected to force to produce horizontal displacement in the steering direction. When the horizontal displacement exceeds a certain range, the first-stage steel wire vibration isolation device drives the secondary steel wire vibration isolation device to produce horizontal displacement in the same direction through the three-way transmission device. The first-stage steel wire vibration isolation device and the secondary steel wire vibration isolation device jointly exert nonlinear energy dissipation effect to reduce the vibration of the floating slab track bed.

[0017] Furthermore, the first-level steel wire vibration isolation device includes an outer steel wire strand, a top plate clamp and a bottom plate clamp. Clamps are provided at both ends of the bottom plate clamp. The two ends of the outer steel wire strand are respectively fixedly connected to the two clamps. The outer steel wire strand passes through the top plate clamp and is fixedly connected to the top plate clamp.

[0018] Furthermore, the secondary steel wire vibration isolation device includes an inner steel wire strand, an upper connecting clamp and a lower connecting clamp, the upper connecting clamp is connected to the three-way transmission device, the lower connecting clamp is connected to the primary steel wire vibration isolation device, and the two ends of the inner steel wire strand are fixedly connected to the upper connecting clamp and the lower connecting clamp respectively.

[0019] Furthermore, the three-way transmission device includes a horizontal slide rail, an upper connecting plate, a lower connecting plate and a closed steel pipe. The upper connecting plate is slidably installed on the horizontal slide rail. A top plate clamp is installed on the other side of the horizontal slide rail. The lower connecting plate is connected to the upper connecting clamp by connecting bolts. The upper connecting plate and the lower connecting plate are connected by a closed steel pipe.

[0020] Furthermore, the closed steel pipe is in the shape of a hexagonal prism, and the upper connecting plate and the lower connecting plate are provided with through holes matching the closed steel pipe, and the closed steel pipe can slide horizontally along the through holes.

[0021] Furthermore, the lower connecting plate is provided with a threaded hole, the connecting bolt is installed in the threaded hole, the upper connecting fixture is provided with a sliding hole, the connecting bolt passes through the sliding hole, and the upper connecting fixture slides along the connecting bolt through the sliding hole.

[0022] Furthermore, the top plate clamp and the bottom plate clamp are provided with fixing holes, and the vibration isolation system is fixedly connected to the floating plate ballast and the foundation through the fixing holes in combination with bolts.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention provides a double-layer load-bearing and energy-dissipating capacity for the floating slab roadbed through a primary steel wire vibration isolation device and a secondary steel wire vibration isolation device. When the floating slab roadbed bears the vertical load of the train, the subway train moves forward or the subway train enters a curve, when the load is small, the primary steel wire vibration isolation device will deform and consume energy alone. When the load is large and the displacement of the primary steel wire vibration isolation device exceeds a certain range, the secondary steel wire vibration isolation device will be driven by a three-way transmission device to deform and consume energy together, thereby increasing the load-bearing capacity and energy dissipation capacity of the vibration isolation system.

[0025] 2. The three-way transmission device in the present invention enables relative horizontal sliding between the top plate clamp and the upper connecting plate through horizontal slide rails, relative horizontal sliding between the upper connecting plate and the lower connecting plate through closed steel pipes, and relative vertical sliding between the lower connecting plate and the upper connecting clamp through connecting bolts, and the above three relative sliding states act independently of each other. Through the setting of the three-way transmission device, the primary steel wire vibration isolation device and the secondary steel wire vibration isolation device have three-way vibration isolation capabilities, and at the same time reduce the transmission of three-directional vibrations caused by the vertical load of the subway train, the load generated by the forward movement of the subway train, and the load generated by the subway train entering a curve to the upper structure. It has strong load adaptability and can be widely used in various floating slab roadbed vibration isolation schemes for subway transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings:

[0027] Figure 1 It is a cross-sectional schematic diagram of a three-dimensional steel wire vibration isolation system for a floating slab track bed with two lines of defense according to the present invention;

[0028] Figure 2 This is a cross-sectional view of the three-dimensional steel wire vibration isolation system of the present invention:

[0029] Figure 3 It is a side view of the three-dimensional steel wire vibration isolation system of the present invention;

[0030] Figure 4 is a cross-sectional view of the three-way transmission device of the present invention;

[0031] Figure 5 It is a side view of the three-way transmission device of the present invention;

[0032] Figure 6 It is a working schematic diagram of the floating slab ballast in the present invention when it bears a small vertical load;

[0033] Figure 7 It is a working schematic diagram of the three-dimensional steel wire vibration isolation system in the present invention when it bears a small vertical load;

[0034] Figure 8 It is a working schematic diagram of the floating slab roadbed in the present invention when it bears a large vertical load;

[0035] Fig. 9 It is a working schematic diagram of the three-dimensional steel wire vibration isolation system in the present invention when it bears a large vertical load;

[0036] Fig.10 It is a working schematic diagram of the three-dimensional steel wire vibration isolation system in the present invention when it bears a relatively small horizontal load;

[0037] Fig.11 It is a working schematic diagram of the three-dimensional steel wire vibration isolation system in the present invention when it is subjected to a large horizontal load;

[0038] Fig.12 It is a working schematic diagram of the floating slab roadbed in the present invention when it bears a small turning load;

[0039] Fig.13 It is a working schematic diagram of the three-dimensional steel wire vibration isolation system in the present invention when it is subjected to a relatively small turning load;

[0040] Fig.14 It is a working schematic diagram of the floating slab roadbed in the present invention when it bears a large turning load;

[0041] Fig.15It is a working schematic diagram of the three-dimensional steel wire vibration isolation system in the present invention when it is subjected to a large turning load.

[0042] In the figure: 1-floating slab track; 2-track; 3-tunnel; 4-primary steel wire vibration isolation device; 41-outer steel wire strand; 42-top plate clamp; 43-bottom plate clamp; 44-clamp; 5-secondary steel wire vibration isolation device; 51-inner steel wire strand; 52-upper connecting clamp; 53-lower connecting clamp; 54-slide hole; 6-three-way transmission device; 61-horizontal slide rail; 62-upper connecting plate; 63-lower connecting plate; 64-closed steel pipe; 65-connecting bolt; 66-threaded hole; 7-foundation. DETAILED DESCRIPTION

[0043] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0044] The installation of the vibration isolation system of the present invention and the floating plate track bed is as follows: Figure 1 As shown, a foundation 7 is laid in the tunnel 3 , a floating slab ballast 1 is supported on the foundation 7 via a vibration isolation system, and a track 2 is laid on the floating slab ballast 1 .

[0045] like Figures 2 to 5 As shown, a three-dimensional steel wire vibration isolation system for a floating slab track bed with two lines of defense of the present invention comprises a primary steel wire vibration isolation device 4, a secondary steel wire vibration isolation device 5 and a three-way transmission device 6. The primary steel wire vibration isolation device 4 and the secondary steel wire vibration isolation device 5 are connected via the three-way transmission device 6. The primary steel wire vibration isolation device 4 is used to carry the floating slab track bed 1 and reduce the vibration of the floating slab track bed 1. The secondary steel wire vibration isolation device 5 is installed in the primary steel wire vibration isolation device 4. The secondary steel wire vibration isolation device 5 is used to increase the bearing capacity and vibration reduction performance of the primary steel wire vibration isolation device 4 on the floating slab track bed 1. The three-way transmission device 6 provides three-way vibration isolation capability for the primary steel wire vibration isolation device 4 and the secondary steel wire vibration isolation device 5.

[0046] The above structural design provides a double-layer load-bearing and energy-absorbing capacity for the floating slab track bed 1 through the primary steel wire vibration isolation device 4 and the secondary steel wire vibration isolation device 5. At the same time, through the setting of the three-way transmission device 6, the primary steel wire vibration isolation device 4 and the secondary steel wire vibration isolation device 5 have a three-way vibration isolation capability, thereby reducing the transmission of vibrations in three directions caused by the vertical load of the subway train, the load generated by the forward movement of the subway train, and the load generated by the subway train entering a curve to the upper structure, so that the vibration isolation system has a large load-bearing capacity, a good vibration isolation effect, a high safety reserve, and strong adaptability to the application subject and the load.

[0047] The first-level steel wire vibration isolation device 4 includes an outer steel wire strand 41, a top plate clamp 42 and a bottom plate clamp 43. Clamps 44 are provided at both ends of the bottom plate clamp 43. The two ends of the outer steel wire strand 41 are respectively fixedly connected to the two clamps 44. The middle part of the outer steel wire strand 41 passes through the top plate clamp 42 and is fixedly connected to the top plate clamp 42. Fixing holes (not shown in the figure) are opened on the top plate clamp 42 and the bottom plate clamp 43. The vibration isolation system is fixedly connected to the floating plate track bed 1 and the foundation 7 through the fixing holes in combination with bolts.

[0048] The secondary steel wire vibration isolation device 5 includes an inner steel wire strand 51, an upper connecting clamp 52 and a lower connecting clamp 53. The upper connecting clamp 52 is connected to the three-way transmission device 6, and the lower connecting clamp 53 is connected to the primary steel wire vibration isolation device 4. Specifically, the lower connecting clamp 53 is fixed on the bottom plate clamp 43, and the two ends of the inner steel wire strand 51 are fixedly connected to the upper connecting clamp 52 and the lower connecting clamp 53 respectively.

[0049] The three-way transmission device 6 includes a horizontal slide rail 61, an upper connecting plate 62, a lower connecting plate 63 and a closed steel pipe 64. The upper connecting plate 62 is slidably installed on one side of the horizontal slide rail 61, and a top plate clamp 42 is installed on the other side of the horizontal slide rail 61. The upper connecting plate 62 and the top plate clamp 42 can both slide on the horizontal slide rail 61. The lower connecting plate 63 is connected to the upper connecting clamp 52 by a connecting bolt 65, and the upper connecting plate 62 and the lower connecting plate 63 are connected by a closed steel pipe 64.

[0050] Specifically, the shape of the closed steel tube 64 is a hexagonal prism, and can also be other non-circular shapes. The upper connecting plate 62 and the lower connecting plate 63 are provided with through holes (not shown in the figure) that match the shape of the closed steel tube 64. The upper connecting plate 62 and the lower connecting plate 63 are installed on the closed steel tube 64 through the through holes, and the closed steel tube 64 can slide horizontally along the through holes. The lower connecting plate 63 is provided with a threaded hole 66, and the connecting bolt 65 is installed in the threaded hole 66. The upper connecting clamp 52 is provided with a sliding hole 54, and the connecting bolt 65 passes through the sliding hole 54. The upper connecting clamp 52 slides along the connecting bolt 65 through the sliding hole 54.

[0051] like Figure 6 to Figure 7 As shown, when the vibration isolation system is subjected to a relatively small vertical load from a subway train, the first-stage steel wire vibration isolation device 4 is subjected to a force to produce a vertical downward displacement, and the first-stage steel wire vibration isolation device 4 exerts a nonlinear energy dissipation effect to reduce vibration of the floating slab track bed 1.

[0052] When the first-stage steel wire vibration isolation device 4 is subjected to force and produces a vertical downward displacement, specifically, the top plate clamp 42 produces a vertical downward displacement, causing the peripheral steel wire strands 41 to produce vertical compression deformation, thereby exerting a nonlinear energy dissipation effect.

[0053] like Figures 8 to 9As shown, when the vibration isolation system is subjected to a large vertical load from a subway train, the first-stage steel wire vibration isolation device 4 is first subjected to force to produce a vertical downward displacement. When the vertical downward displacement exceeds a certain range, the first-stage steel wire vibration isolation device 4 drives the secondary steel wire vibration isolation device 5 to move vertically downward through the three-way transmission device 6. The first-stage steel wire vibration isolation device 4 and the secondary steel wire vibration isolation device 5 jointly exert a nonlinear energy dissipation effect to reduce the vibration of the floating slab track bed 1.

[0054] Specifically, the top plate clamp 42 first produces a vertical downward displacement, causing the outer steel wire strands 41 to produce vertical compression deformation, thereby exerting a nonlinear energy dissipation effect. When the vertical downward displacement exceeds a certain range, the lower connecting plate 63 will squeeze downward to drive the upper connecting clamp 52 to displace vertically downward together, causing the outer steel wire strands 41 and the inner steel wire strands 51 to produce vertical compression deformation together, thereby exerting a nonlinear energy dissipation effect together.

[0055] like Fig.10 As shown, when the subway train moves forward, the vibration isolation system is subjected to a small horizontal load, and the first-stage steel wire vibration isolation device 4 is subjected to a force to produce a horizontal displacement, and the first-stage steel wire vibration isolation device 4 exerts a nonlinear energy dissipation effect to reduce the vibration of the floating plate track bed 1.

[0056] Specifically, the top plate clamp 42 generates horizontal displacement in the direction of travel of the subway train, causing the outer steel wire strands 41 to generate horizontal shear deformation in the direction of travel of the subway train, thereby exerting a nonlinear energy dissipation effect.

[0057] like Fig.11 As shown, when the subway train moves forward and the vibration isolation system is subjected to a large horizontal load, the first-stage steel wire vibration isolation device 4 is first subjected to force to produce horizontal displacement. When the horizontal displacement exceeds a certain range, the first-stage steel wire vibration isolation device 4 drives the secondary steel wire vibration isolation device 5 to move horizontally through the three-way transmission device 6. The first-stage steel wire vibration isolation device 4 and the secondary steel wire vibration isolation device 5 jointly exert a nonlinear energy dissipation effect to reduce the vibration of the floating plate track bed 1.

[0058] Specifically, the top plate clamp 42 first generates a horizontal displacement in the direction of travel of the subway train, causing the outer steel wire strands 41 to generate horizontal shear deformation in the direction of travel of the subway train, thereby exerting a nonlinear energy dissipation effect. When the horizontal displacement in the direction of travel of the subway train exceeds a certain range, the top plate clamp 42 will drive the upper connecting clamp 52 to jointly generate a horizontal displacement in the direction of travel of the subway train through the three-way transmission device 6, causing the outer steel wire strands 41 and the inner steel wire strands 51 to jointly generate horizontal shear deformation in the direction of travel of the subway train, thereby exerting a nonlinear energy dissipation effect.

[0059] like Figure 12 to Figure 13As shown, when the subway train enters a curve and the vibration isolation system is subjected to a small steering load, the first-stage steel wire vibration isolation device 4 is subjected to a force to produce a horizontal displacement in the steering direction, and the first-stage steel wire vibration isolation device 4 exerts a nonlinear energy dissipation effect to reduce the vibration of the floating plate track bed 1.

[0060] Specifically, the top plate clamp 42 generates a horizontal displacement in the direction of the train turning, causing the outer steel wire strands 41 to generate horizontal shear deformation, thereby exerting a nonlinear energy dissipation effect.

[0061] like Figure 14 to Figure 15 As shown, when the subway train enters a curve and the vibration isolation system is subjected to a large steering load, the first-stage steel wire vibration isolation device 4 is first subjected to force to produce a horizontal displacement in the steering direction. When the horizontal displacement exceeds a certain range, the first-stage steel wire vibration isolation device 4 drives the secondary steel wire vibration isolation device 5 to produce a horizontal displacement in the same direction through the three-way transmission device 6. The first-stage steel wire vibration isolation device 4 and the secondary steel wire vibration isolation device 5 jointly exert a nonlinear energy dissipation effect to reduce the vibration of the floating slab track bed 1.

[0062] Specifically, the top plate clamp 42 first generates a horizontal displacement in the direction of the train turning, causing the outer steel wire strands 41 to produce horizontal shear deformation, thereby exerting a nonlinear energy dissipation effect. When the horizontal displacement in the direction of the train turning exceeds a certain range, the top plate clamp 42 will drive the upper connecting clamp 52 to horizontally displace in the same direction through the three-way transmission device 6, causing the outer steel wire strands 41 and the inner steel wire strands 51 to produce horizontal shear deformation together, thereby exerting a nonlinear energy dissipation effect together.

[0063] The implementation methods of the present invention are not limited to these. According to the above-mentioned embodiments of the present invention, by using conventional technical knowledge and customary means in the art, without departing from the above-mentioned basic technical ideas of the present invention and without conflict, the above-mentioned preferred embodiments may also be modified, replaced or combined in various other forms, and the other embodiments obtained all fall within the scope of protection of the present invention.

Claims

1. A three-dimensional steel wire vibration isolation system for floating slab track bed with two lines of defense, characterized in that include: A first-stage steel wire vibration isolation device, wherein the first-stage steel wire vibration isolation device is used to support the floating slab ballast and reduce vibration of the floating slab ballast; A secondary steel wire vibration isolation device, the secondary steel wire vibration isolation device is installed in the primary steel wire vibration isolation device, and the secondary steel wire vibration isolation device is used to increase the bearing capacity and vibration reduction performance of the primary steel wire vibration isolation device on the floating slab track bed; A three-way transmission device, the primary steel wire vibration isolation device and the secondary steel wire vibration isolation device are connected through the three-way transmission device, and the three-way transmission device provides three-way vibration isolation capability for the primary steel wire vibration isolation device and the secondary steel wire vibration isolation device.

2. A three-dimensional steel wire vibration isolation system for a floating slab track bed with two lines of defense according to claim 1, characterized in that: When the vibration isolation system is subjected to a small vertical load, the first-stage steel wire vibration isolation device is subjected to a force to produce a vertical downward displacement, and the first-stage steel wire vibration isolation device exerts a nonlinear energy dissipation effect to reduce the vibration of the floating slab track bed; When the vibration isolation system is subjected to a large vertical load, the first-stage steel wire vibration isolation device is first subjected to force to produce a vertical downward displacement. When the vertical downward displacement exceeds a certain range, the first-stage steel wire vibration isolation device drives the secondary steel wire vibration isolation device to move vertically downward through the three-way transmission device. The first-stage steel wire vibration isolation device and the secondary steel wire vibration isolation device jointly exert a nonlinear energy dissipation effect to reduce the vibration of the floating slab track bed.

3. The three-dimensional steel wire vibration isolation system for floating slab track bed with two lines of defense according to claim 1 is characterized by: When the vibration isolation system is subjected to a small horizontal load, the first-stage steel wire vibration isolation device is subjected to a force to produce a horizontal displacement, and the first-stage steel wire vibration isolation device exerts a nonlinear energy dissipation effect to reduce the vibration of the floating plate track bed; When the vibration isolation system is subjected to a large horizontal load, the first-stage steel wire vibration isolation device is first subjected to force to produce horizontal displacement. When the horizontal displacement exceeds a certain range, the first-stage steel wire vibration isolation device drives the secondary steel wire vibration isolation device to move horizontally through the three-way transmission device. The first-stage steel wire vibration isolation device and the secondary steel wire vibration isolation device jointly exert a nonlinear energy dissipation effect to reduce the vibration of the floating slab track bed.

4. The three-dimensional steel wire vibration isolation system for floating slab track bed with two lines of defense according to claim 1 is characterized by: When the vibration isolation system is subjected to a relatively small steering load, the first-stage steel wire vibration isolation device is subjected to force to generate a horizontal displacement in the steering direction, and the first-stage steel wire vibration isolation device exerts a nonlinear energy dissipation effect to reduce the vibration of the floating slab track bed; when the vibration isolation system is subjected to a relatively large steering load, the first-stage steel wire vibration isolation device is first subjected to force to generate a horizontal displacement in the steering direction, and when the horizontal displacement exceeds a certain range, the first-stage steel wire vibration isolation device drives the secondary steel wire vibration isolation device to generate a horizontal displacement in the same direction through the three-way transmission device, and the first-stage steel wire vibration isolation device and the secondary steel wire vibration isolation device jointly exert a nonlinear energy dissipation effect to reduce the vibration of the floating slab track bed.

5. The three-dimensional steel wire vibration isolation system for floating slab track bed with two lines of defense according to claim 1 is characterized by: The first-stage steel wire vibration isolation device includes an outer steel wire strand, a top plate clamp and a bottom plate clamp, the two ends of the bottom plate clamp are provided with clamping plates, the two ends of the outer steel wire strand are respectively fixedly connected to the two clamping plates, and the outer steel wire strand passes through the top plate clamp and is fixedly connected to the top plate clamp.

6. A three-dimensional steel wire vibration isolation system for a floating slab track bed with two lines of defense according to claim 5, characterized in that: The secondary steel wire vibration isolation device includes an inner steel wire strand, an upper connecting clamp and a lower connecting clamp, the upper connecting clamp is connected to the three-way transmission device, the lower connecting clamp is connected to the primary steel wire vibration isolation device, and the two ends of the inner steel wire strand are fixedly connected to the upper connecting clamp and the lower connecting clamp respectively.

7. The three-dimensional steel wire vibration isolation system for floating slab track bed with two lines of defense according to claim 6 is characterized by: The three-way transmission device includes a horizontal slide rail, an upper connecting plate, a lower connecting plate and a closed steel pipe. The upper connecting plate is slidably installed on the horizontal slide rail, and the top plate clamp is installed on the other side of the horizontal slide rail. The lower connecting plate is connected to the upper connecting clamp by connecting bolts, and the upper connecting plate and the lower connecting plate are connected by the closed steel pipe.

8. The three-dimensional steel wire vibration isolation system for floating slab track bed with two lines of defense according to claim 7 is characterized by: The closed steel pipe is in the shape of a hexagonal prism, and the upper connecting plate and the lower connecting plate are provided with through holes matching the closed steel pipe, and the closed steel pipe can slide horizontally along the through holes.

9. The three-dimensional steel wire vibration isolation system for floating slab track bed with two lines of defense according to claim 7, characterized in that: The lower connecting plate is provided with a threaded hole, the connecting bolt is installed in the threaded hole, the upper connecting fixture is provided with a sliding hole, the connecting bolt passes through the sliding hole, and the upper connecting fixture slides along the connecting bolt through the sliding hole.

10. The three-dimensional steel wire vibration isolation system for floating slab track bed with two lines of defense according to claim 5, characterized in that: The top plate clamp and the bottom plate clamp are provided with fixing holes, and the vibration isolation system is fixedly connected to the floating plate ballast and the foundation through the fixing holes in combination with bolts.

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