Steel spring floating slab track structure and construction method

Abstract

The invention discloses a steel spring floating slab track structure which comprises a base, a plurality of floating slab units are arranged at the top of the base and connected end to end, and each floating slab unit comprises floating slab end plates located at the two ends and a floating slab middle plate located between the two floating slab end plates. A wet joint is arranged between the floating slab end plate and the floating slab middle plate, and the end faces, facing the wet joint, of the floating slab end plate and the floating slab middle plate are designed to be concave and rough. The multiple floating slab end plates and the multiple floating slab middle plates are longitudinally connected through the wet joints to form the floating slab units, the adjacent floating slab units are connected through the second connecting pieces and the square shared vibration isolators, the smoothness and coordination of the adjacent slab bodies are effectively guaranteed, the driving safety and stability are greatly improved, and the service life of the floating slab units is prolonged. And the service life of rail structure components such as the plate end fastener, the second connecting piece and the like is ensured.

Description

Technical Field

[0001] The invention relates to the field of urban rail transit railway track structures, and in particular to a steel spring floating plate track structure and a construction method. Background Art

[0002] The vibration reduction design of urban rail transit projects is critical to improving ride comfort, reducing vibration and noise pollution, and protecting surrounding buildings and urban infrastructure. Effective vibration reduction design can not only extend the service life of the rail system, but also reduce maintenance costs and improve the overall performance of urban rail transit. Generally speaking, the vibration reduction level is divided into three levels: medium vibration reduction, high vibration reduction, and special vibration reduction according to the predicted excess amount of environmental impact assessment. Among them, the special vibration reduction measure adopts the superior performance steel spring floating plate vibration reduction track.

[0003] At present, urban rail transit steel spring floating slabs generally adopt cast-in-place or prefabricated construction technology. The cast-in-place floating slab has a complex structure and has many disadvantages, such as slow construction progress, large amount of on-site concrete pouring, difficult quality control of cast-in-place concrete, high labor intensity, harsh working environment, many cracks in the cast-in-place ballast and difficult to control, and difficult maintenance. Although the prefabricated floating slab has greatly improved the quality of the slab and increased the construction speed, it is limited by the tunnel construction space and hoisting transportation. The length of the prefabricated floating unit slab is generally 3.6~6m. Compared with the 15~25m of the cast-in-place floating slab, the shorter length and smaller vibration mass reduce its vibration reduction effect. At the same time, the number of connecting hinges between the slabs is greatly increased, which makes the problem of discontinuous stiffness of adjacent slabs prominent. When the deformation difference is too large, the rails and the slab end fasteners will be subjected to greater stress, resulting in poor driving safety and stability, poor vibration reduction effect, short service life of the track structure, and high maintenance cost.

[0004] There are some relevant patents on floating plate track structure in the field of urban rail transit. Patent CN110700023A discloses a steel spring integral roadbed construction method based on track engineering. This construction method is mainly aimed at cast-in-place floating plate roadbeds used in domestic urban rail transit. The on-site construction and concrete pouring of cast-in-place roadbeds are large, and there are serious environmental pollution and long construction period. Patent CN203475237U discloses an overlapping floating roadbed. In this scheme, two adjacent floating plates transmit the vertical load of the train by extending the platform. The overlapping parts are fixed with bolts with upper and lower through holes. Under large train loads, the bolts are prone to fatigue damage, which poses a hidden danger to driving safety. Patent CN113215863A discloses a prefabricated floating plate track structure and limit device. In this scheme, the adjacent floating plates are fixed by the wave-shaped joints set at the head and tail of the floating plates. The plate end limit capacity is weak, which affects the driving safety and stability, and the adaptability to curved sections is poor.

[0005] As can be seen from the existing floating slab track structures, cast-in-place floating slabs generally have problems such as slow construction progress, difficult project quality control, many and difficult to control cracks in the cast-in-place ballast bed, and difficult maintenance. Although prefabricated floating slabs can make up for the frequent problems of the above-mentioned cast-in-place floating slabs, the problem of discontinuous stiffness of adjacent slabs is also very prominent, and there are many disadvantages such as poor driving safety, poor vibration reduction effect, and short service life of the track structure. Summary of the invention

[0006] In order to improve the problems of slow construction progress of cast-in-place floating slabs, difficult engineering quality control, many and difficult-to-control cracks in cast-in-place ballast beds, difficult maintenance, discontinuous stiffness of adjacent slabs of prefabricated floating slabs, poor driving safety, poor vibration reduction effect, and short service life of track structures, the present invention provides a steel spring floating slab track structure and a construction method.

[0007] On the one hand, the present invention provides a steel spring floating plate track structure adopting the following technical solution: A steel spring floating plate track structure comprises a base, a plurality of floating plate units are arranged on the top of the base, the plurality of floating plate units are connected end to end, each floating plate unit comprises floating plate end plates located at both ends and a floating plate middle plate located between the two floating plate end plates, a wet joint is arranged between the floating plate end plates and the floating plate middle plates, and the end surfaces of the floating plate end plates and the floating plate middle plates facing the wet joint are designed to be concave and rough.

[0008] Furthermore, the end surfaces of the floating plate end plates and the floating plate middle plates facing the wet joints are fixedly connected with a first connecting piece, a plate seam is arranged between every two floating plate units, and every two floating plate units are connected via a square shared vibration isolator and a second connecting piece.

[0009] Furthermore, the first connecting member includes exposed steel bars, and the exposed steel bars are arranged in a staggered and complementary manner with long and short steel bars.

[0010] Furthermore, the floating plate end plates and the floating plate middle plates are both pre-embedded with RFID chips.

[0011] Furthermore, an inspection hole is provided at the center of the connection end of the floating plate end plate and the floating plate middle plate, and an inspection cover plate is provided above the inspection hole.

[0012] Furthermore, lifting sleeves are pre-embedded on the side surfaces of the floating plate end plates and the floating plate middle plates.

[0013] Furthermore, circular vibration isolators are provided on both sides of the floating plate end plate and the floating plate middle plate.

[0014] Furthermore, sealing strip installation sleeves are pre-buried on both sides of the floating plate end plate and the floating plate middle plate, and the sealing strip installation sleeves are located outside the circular vibration isolator.

[0015] Furthermore, a grounding terminal is provided at one end of the floating plate unit close to the plate seam, and two adjacent grounding terminals are connected by a connecting steel cable.

[0016] On the other hand, the present invention provides a construction method of a steel spring floating plate track structure, comprising the following steps: Step 1: Carry out construction preparations, and after the preparations are completed, lay the gantry crane running rails; Step 2: Binding of base reinforcement: the base reinforcement that has been inspected and processed on site is unloaded through the rail opening and transported to the working surface, and the reinforcement mesh is bound on site; Step 3: Casting of base concrete: First, ensure that the formwork is firmly installed and the interior is clean; then, stir the concrete that is evenly mixed in proportion and transport it to the casting site; after casting, maintain it in time to keep the concrete moist until it reaches the designed strength; Step 4: Re-measurement of the base: After the concrete reaches the specified strength, the base is accurately re-measured in terms of plane position, elevation and levelness using high-precision measuring instruments. Adjustments and treatments are made in a timely manner based on the results to ensure that the base is flat and stable and meets the design requirements. Step 5. Production, transportation and laying of prefabricated floating slabs: In the factory, the prefabricated floating slabs are mainly produced through strict process control processes such as mold preparation, placement of the outer sleeve of the vibration isolator, binding of steel bars and drainage welding, concrete pouring and maintenance. After the prefabricated slabs are transported to the track laying base, they are hoisted from the unloading port to the flatbed truck using the gantry crane installed at the track laying base. The rail car runs to the laying site, and the track laying gantry crane hoists them to the working surface. Step 6: Install the sealing strip: Install the sealing strip firmly on the end plate and the middle plate of the floating plate to effectively prevent debris from entering the interior of the floating plate during the subsequent construction process; Step 7: Install the vibration isolators: lift the floating plate, install the square shared vibration isolators and the circular vibration isolators, and ensure that the vibration isolators are placed in the correct position and direction; use a special hydraulic jack to lift each floating plate from the base to the designed height; Step 8. Wet joint formwork and concrete pouring: accurately set the formwork between the adjacent floating slab end plates and the floating slab middle plates to ensure that the position and size of the wet joints are accurate, and then pour the concrete, strictly control the quality and pouring speed of the concrete, and ensure that the concrete evenly fills the formwork space to achieve the density and strength required by the design; Step 9: Install the rail fasteners and fix the sealing strips, ensuring that the sealing strips are flat, firm and have no gaps; Install the second connecting piece: Use bolts to install the second connecting piece on the adjacent floating plate end plate, ensuring that the installation is firm and reliable.

[0017] In summary, the present invention includes at least one of the following beneficial technical effects: 1. The present invention is based on the principle of minimizing the number of weak links and shear hinges in the plate seams. The floating plate end plate and the floating plate middle plate are longitudinally connected through wet joints to form a floating plate unit. Adjacent floating plate units are connected through shear hinges and square shared vibration isolators, which effectively ensures the smoothness and coordination of adjacent plate bodies, greatly improves driving safety and stability, and ensures the life of track structure components such as the plate end fastener shear hinge. Inspection holes are set at the plate ends of the floating plate end plate and the floating plate middle plate, which reduces the weight of the track structure to a certain extent and saves engineering costs. It is mainly used by the engineering department to check whether there is foreign matter intrusion under the floating plate and in the central ditch, and the plate body reserves space for the installation of the inspection cover to ensure the flatness of the plate surface and facilitate subsequent inspections by engineering personnel.

[0018] 2. The floating plate of the present invention is a factory prefabricated structure, which is more convenient for production, stacking, transportation and on-site assembly. At the same time, during the prefabrication in the factory, an RFID chip is embedded, and the chip contains track manufacturing information, line mileage information, etc., which can realize the information management of the floating plate track.

[0019] 3. The present invention adopts prefabricated floating short plates to assemble into long plates, and connects several short plates with cast-in-place wet joints to form assembled floating plate units. The vibration-parameter mass is increased, and the overall vibration reduction effect of the floating plate system is improved. Compared with other cast-in-place floating plate structures, the construction efficiency and engineering quality are better under the same vibration reduction effect.

[0020] 4. The joint end faces of the floating slab end plates and the floating slab middle plates of the present invention are carefully designed with concave sections and rough interfaces, which strengthen the mechanical bite force of the cross section and the bonding force between the new and old concrete. This design not only improves the bending resistance of the wet joint position, but also more effectively enhances the overall stability of the floating slab unit structure, ensuring the safety and durability of the structure. The roughening of the joint interface can be done by slow-setting water flushing or roughening. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the steel spring floating plate track structure according to an embodiment of the present invention; Figure 2 This is an exploded view of a steel spring floating plate track structure according to an embodiment of the present invention; Figure 3 Schematic diagram of a floating plate end plate of a steel spring floating plate track structure according to an embodiment of the present invention; Figure 4 Schematic diagram of the floating plate middle plate of the steel spring floating plate track structure according to an embodiment of the present invention; Figure 5 It is a schematic diagram of the side structure of the steel spring floating plate track structure at the plate seam according to an embodiment of the present invention; Figure 6 Schematic diagram of exposed steel bars at wet joints of a steel spring floating plate track structure according to an embodiment of the present invention; Figure 7 It is a schematic diagram of the front structure of the steel spring floating plate track structure at the plate seam according to an embodiment of the present invention; Figure 8 It is a schematic diagram of a transition section between a steel spring floating plate track structure and a common integral track bed according to an embodiment of the present invention; Fig. 9 It is a schematic diagram of a transition section between a steel spring floating plate track structure and a medium vibration damping ballast bed according to an embodiment of the present invention; Fig.10 It is a schematic diagram of a transition section between a steel spring floating plate track structure and an advanced vibration-damping ballast bed according to an embodiment of the present invention.

[0022] Figure numerals: 1. Rail; 2. Fastener; 3. Rail support; 4. Floating plate end plate; 5. Floating plate middle plate; 6. Exposed steel bars; 7. Wet joint; 8. Circular isolator; 9. Top shear hinge; 10. Square shared isolator; 11. Inspection cover; 12. Lifting sleeve; 13. Sealing strip installation sleeve; 14. Grounding terminal; 15. Connecting steel cable; 16. Base. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] The following is combined with Figure 1-10 The present invention is described in further detail.

[0029] Example 1 The embodiment of the present invention discloses a steel spring floating plate track structure. Figure 1-10 The steel spring floating plate track structure mainly includes rails 1, fasteners 2, rail bearing platforms 3, floating plate end plates 4, floating plate middle plates 5, exposed steel bars 6, wet joints 7, circular vibration isolators 8, second connectors, square shared vibration isolators 10, inspection covers 11, lifting sleeves 12, sealing strip installation sleeves 13, grounding terminals 14, connecting steel cables 15, and bases 16. A plurality of floating plate units are arranged on the top of the base 16, and the plurality of floating plate units are connected end to end. Each floating plate unit includes floating plate end plates 4 at both ends and a floating plate middle plate 5 between the two floating plate end plates 4. A wet joint 7 is arranged between the floating plate end plates 4 and the floating plate middle plates 5. The end surfaces of the floating plate end plates 4 and the floating plate middle plates 5 facing the wet joint 7 are designed to be concave and rough, which can increase the mechanical bite force of the cross section and the bonding force between the new and old concrete, and ensure the bending resistance of the wet joint 7. The roughening of the joint interface can be done by slow-setting water flushing or chiseling.

[0030] Furthermore, the end faces of the floating plate end plate 4 and the floating plate middle plate 5 facing the wet joint 7 are fixedly connected with a first connecting member, and the first connecting member includes an exposed steel bar 6, and the exposed steel bar 6 is arranged in a staggered and complementary manner with long and short steel bars. A plate seam is set between every two floating plate units, and every two floating plate units are connected to the second connecting member through a square shared vibration isolator 10, and the second connecting member is an upper shear hinge 9. The floating plate end plate 4 and the floating plate middle plate 5 are both arranged with upper and lower layers of ordinary steel bars, and the steel bars are reinforced at the circular vibration isolator 8. The longitudinal bars in the plate are inclined at a certain angle and exposed to form exposed steel bars 6 arranged in a staggered manner with long and short bars, so as to ensure the successful complementary overlap of the two short plate units. The exposed steel bars 6 at the wet joint 7 are arranged in a staggered and complementary manner with long and short steel bars as a preferred solution. In addition, sleeve connection, tension lock connection and other methods can also be used.

[0031] During specific implementation, the floating slab end plate 4 is 3445mm long, 2600mm wide and 340mm high. An upper shear hinge 9 interface, a square shared vibration isolator 10 interface and an inspection cover plate 11 installation interface are reserved on one side close to the plate seam. An inspection cover plate 11 installation interface and staggered exposed steel bars 6 are reserved at the wet joint 7 end on the other side. A square shared vibration isolator 10 installation space symmetrically along the center line of the line is set at the plate seam end, with specific dimensions of 270mm long, 350mm wide and 100mm high. The middle plate 5 is 3320mm long, 2600mm wide and 340mm high. Inspection cover plate 11 installation interfaces and staggered exposed steel bars 6 are reserved on both sides of the plate. The floating slab end plate 4 and the floating slab middle plate 5 are both prefabricated in the factory and then transported to the construction site for installation and laying.

[0032] More specifically, since the tracks in urban rail transit often use direct current, which is prone to direct current leakage and electrochemical corrosion, in order to meet the insulation performance requirements of urban rail transit, a floating plate structure with rail support platforms 3 is adopted, and eight pairs of rail support platforms 3 are arranged on the floating plate end plate 4 and the floating plate middle plate 5. The fasteners 2 use the fastener type that matches the floating plate end plate 4 and the floating plate middle plate 5, and the fastener spacing is 600mm. In a floating plate unit, the wet joint 7 between the adjacent floating plate end plates 4 and the floating plate middle plates 5 is 280mm wide, and UHPC ultra-high performance concrete is used as the casting material, and the concrete grade is C80.

[0033] Furthermore, both the floating plate end plate 4 and the floating plate middle plate 5 are pre-embedded with RFID chips, which contain track manufacturing information, line mileage information, etc., and can realize the information management of the floating plate track.

[0034] Furthermore, the floating plate end plate 4 and the floating plate middle plate 5 are both provided with an outer sleeve of a built-in circular vibration isolator 8. The longitudinal spacing of the circular vibration isolator 8 is twice the spacing of the fastener 2, 1200mm, and the horizontal spacing is 1860mm. A total of three pairs are arranged, and the whole is located on the outside of the rail 1, which is convenient for later maintenance and repair. A 30mm plate gap is reserved between the floating plate units, and they are connected through square shared vibration isolators 10 and upper shear hinges 9, so that the "broken" stiffness is continuous, ensuring the smooth and coordinated deformation of adjacent long plate units, effectively improving driving safety and stability, and at the same time, the floating plate end plate 4 and the floating plate middle plate 5 are connected through wet joints 7 to further ensure the overall stability of the structure and meet the special vibration reduction requirements of rail transit.

[0035] Furthermore, the upper shear hinges 9 between the floating plate units are connected to the plate body through six anchor bolts and are mainly arranged on the upper plate surface outside the rail 1. The key structure of the shear hinge is exposed and clearly visible, which improves the intuitiveness and operability of maintenance and monitoring, and is conducive to timely and effective maintenance by the engineering department.

[0036] Furthermore, inspection holes are provided at both the end plates 4 and the middle plates 5 of the floating plate, so that the engineering department can check whether there are foreign objects under the floating plate and in the central ditch that affect the vibration reduction effect of the floating plate system. At the same time, the plate body reserves installation space for the inspection cover plate 11. The inspection cover plate 11 is installed with specific dimensions of 710mm in length, 380mm in width, and 20mm in height, which can ensure the flatness of the inspection cover plate 11 and facilitate the walking of engineering inspection personnel. The inner wall of the inspection hole is reserved for the installation of lateral shear hinges along the longitudinal direction of the line, and the integrity of the joint position is improved by installing shear hinges on the side of the inner wall of the inspection hole.

[0037] Furthermore, lifting sleeves 12 are pre-buried on the sides of the floating plate end plates 4 and the floating plate middle plates 5 to facilitate subsequent construction and adjustment; sealing strip installation sleeves 13 are pre-buried on the plate sides to facilitate subsequent construction and installation of the sealing strips.

[0038] Furthermore, the overall track structure adopts a long plate structure of floating plate units, plate seams are set between adjacent floating plate units, and grounding terminals 14 are set at the plate seams of adjacent floating plate units. A grounding terminal 14 is set on the left and right sides of each plate seam, and two adjacent grounding terminals 14 are connected by connecting steel cables 15. The urban rail crossing pipeline can pass through the plate seams / inside the plate, and avoid the outer sleeve of the circular vibration isolator 8 when passing the track inside the plate, and is set between the two rail support platforms 3. The drainage of the track system can be drained longitudinally through the central ditch of the base 16.

[0039] Example 2 On the other hand, the present invention provides a construction method of a steel spring floating plate track structure, referring to Figure 1-10 , including the following steps: Step 1. Construction preparation: Construction preparation includes internal preparation and external preparation. Internal preparation mainly includes reviewing construction drawings, communicating with designers to answer questions in drawings, calculating and verifying construction materials and auxiliary materials, technical briefing, etc.; external preparation includes handover and cleaning of the work site, layout of water and electricity for construction, determination of material transportation plan, surveying and setting of track measurement network, etc.; Laying of gantry crane running rails: 24kg / m steel rails are used as running rails, and the running rails are fixed to the bottom or side wall of the civil structure with special height-adjustable steel piers; first fix the bottom plate of the steel pier to the bottom plate of the tunnel, then adjust the height of the steel pier to the determined position, and use bolts to fasten the upper plate of the steel pier to the running rail; Step 2: Binding of the steel bars of the floating slab base 16: The steel bars of the base 16 that have been inspected and processed on site are unloaded through the rail opening and transported to the working surface, and the steel mesh is bound on site; Step 3: Concrete pouring of floating slab base 16: First, ensure that the formwork is firmly installed and the interior is clean; then, stir the concrete that is evenly mixed in proportion and transport it to the pouring site; during the pouring process, control the speed, pour and vibrate the concrete evenly to remove bubbles and excess moisture; smooth the surface before initial setting to eliminate surface unevenness; after pouring, maintain it in time to keep the concrete moist until it reaches the designed strength; Step 4: Re-measurement of the base 16: After the concrete reaches the specified strength, the plane position, elevation and levelness of the base 16 are accurately re-measured by high-precision measuring instruments, and timely adjustments and processing are carried out according to the results to ensure that the base is flat and stable and meets the design requirements; Step 5. Production, transportation and laying of prefabricated floating slabs: In the factory, the prefabricated floating slabs are mainly produced through strict process control processes such as mold preparation, placement of the outer sleeve of the vibration isolator, binding of steel bars and drainage welding, concrete pouring and maintenance. After the prefabricated slabs are transported to the track laying base, they are hoisted from the unloading port to the flatbed truck using the gantry crane installed at the track laying base. The rail car runs to the laying site, and the track laying gantry crane hoists them to the working surface. Step 6: Install the sealing strip: firmly install the sealing strip on the floating slab end plate 4 and the floating slab middle plate 5 to effectively prevent debris from entering the floating slab during the subsequent construction process; Step 7: Install the vibration isolators: lift the floating plate, install the square shared vibration isolators 10 and the circular vibration isolators 8, and ensure that the vibration isolators are placed in the correct position and direction; use a special hydraulic jack to lift each floating plate from the base to the designed height; Step 8, wet joint 7 formwork and concrete pouring: accurately set the formwork between the adjacent floating slab end plates 4 and the floating slab middle plates 5 to ensure that the position and size of the wet joint 7 are accurate, and then pour the concrete, strictly control the quality and pouring speed of the concrete, ensure that the concrete evenly fills the formwork space and reaches the density and strength required by the design; Step 9. Install the rail 1 fastener 2 and the fixed sealing strip to ensure that the sealing strip is flat, firm and has no gaps; Install the second connecting piece: Use bolts to install the second connecting piece on the adjacent floating plate end plate 4 to ensure that the installation is firm and reliable; Track fine-tuning: Use the fine-tuning device to adjust the elevation, centerline and longitudinal position of the track.

[0040] The present invention is based on the principle of minimizing the number of weak links and shear hinges in the plate seams. The floating plate end plate and the floating plate middle plate are longitudinally connected through wet joints to form a floating plate unit. Adjacent floating plate units are connected through shear hinges and square shared vibration isolators, which effectively ensures the smoothness and coordination of deformation of adjacent plates, greatly improves driving safety and stability, and ensures the life of track structure components such as the plate end fastener shear hinge. Inspection holes are set at the plate ends of the floating plate end plate and the floating plate middle plate, which reduces the weight of the track structure to a certain extent and saves engineering costs. It is mainly used by the engineering department to check whether there is foreign matter intrusion under the floating plate and in the central ditch, and the plate body reserves space for installing the inspection cover to ensure the flatness of the plate surface and facilitate subsequent inspections by engineering personnel.

[0041] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A steel spring floating plate track structure, comprising a base, characterized in that: A plurality of floating plate units are arranged on the top of the base, and the plurality of floating plate units are connected end to end. Each floating plate unit comprises floating plate end plates at both ends and a floating plate middle plate between the two floating plate end plates. A wet joint is arranged between the floating plate end plates and the floating plate middle plates, and the end surfaces of the floating plate end plates and the floating plate middle plates facing the wet joint are designed to be concave and rough.

2. A steel spring floating plate track structure according to claim 1, characterized in that: The end surfaces of the floating plate end plate and the floating plate middle plate facing the wet joint are fixedly connected with a first connecting piece, a plate seam is arranged between every two floating plate units, and every two floating plate units are connected via a square shared vibration isolator and a second connecting piece.

3. The steel spring floating plate track structure according to claim 1, characterized in that: The first connecting member includes exposed steel bars, and the exposed steel bars are arranged in a staggered and complementary manner with long and short steel bars.

4. The steel spring floating plate track structure according to claim 1, characterized in that: The floating plate end plates and the floating plate middle plates are both pre-embedded with RFID chips.

5. The steel spring floating plate track structure according to claim 1, characterized in that: An inspection hole is arranged at the center of the connection end of the floating plate end plate and the floating plate middle plate, and an inspection cover plate is arranged above the inspection hole.

6. The steel spring floating plate track structure according to claim 1, characterized in that: The side surfaces of the floating plate end plates and the floating plate middle plates are pre-embedded with lifting sleeves.

7. The steel spring floating plate track structure according to claim 1, characterized in that: Circular vibration isolators are arranged on both sides of the floating plate end plate and the floating plate middle plate.

8. The steel spring floating plate track structure according to claim 7, characterized in that: Sealing strip installation sleeves are also pre-buried on both sides of the floating plate end plate and the floating plate middle plate, and the sealing strip installation sleeves are located outside the circular vibration isolator.

9. The steel spring floating plate track structure according to claim 2, characterized in that: A grounding terminal is arranged at one end of the floating plate unit close to the plate seam, and two adjacent grounding terminals are connected by a connecting steel cable.

10. A construction method for a steel spring floating plate track structure according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: Carry out construction preparations, and after the preparations are completed, lay the gantry crane running rails; Step 2: Binding of base reinforcement: unload the base reinforcement after on-site inspection and processing through the rail opening and transport it to the working surface, and bind the reinforcement mesh on site; Step 3: Casting of base concrete: First, ensure that the formwork is firmly installed and the interior is clean; then, stir the concrete that is evenly mixed in proportion and transport it to the casting site; after casting, maintain it in time to keep the concrete moist until it reaches the designed strength; Step 4: Re-measurement of the base: After the concrete reaches the specified strength, the base is accurately re-measured in terms of plane position, elevation and levelness using high-precision measuring instruments. Adjustments and treatments are made in a timely manner based on the results to ensure that the base is flat and stable and meets the design requirements. Step 5. Production, transportation and laying of prefabricated floating slabs: In the factory, the prefabricated floating slabs are mainly produced through strict process control processes such as mold preparation, placement of the outer sleeve of the vibration isolator, binding of steel bars and drainage welding, concrete pouring and maintenance. After the prefabricated slabs are transported to the track laying base, they are hoisted from the unloading port to the flatbed truck using the gantry crane installed at the track laying base. The rail car runs to the laying site, and the track laying gantry crane hoists them to the working surface. Step 6: Install the sealing strip: Install the sealing strip firmly on the end plate and the middle plate of the floating plate to effectively prevent debris from entering the interior of the floating plate during the subsequent construction process; Step 7: Install the vibration isolators: lift the floating plate, install the square shared vibration isolators and the circular vibration isolators, and ensure that the vibration isolators are placed in the correct position and direction; use a special hydraulic jack to lift each floating plate from the base to the designed height; Step 8. Wet joint formwork and concrete pouring: accurately set the formwork between the adjacent floating slab end plates and the floating slab middle plates to ensure that the position and size of the wet joints are accurate, and then pour the concrete, strictly control the quality and pouring speed of the concrete, and ensure that the concrete evenly fills the formwork space to achieve the density and strength required by the design; Step 9: Install the rail fasteners and fix the sealing strips, ensuring that the sealing strips are flat, firm and have no gaps; Install the second connecting piece: Use bolts to install the second connecting piece on the adjacent floating plate end plate, ensuring that the installation is firm and reliable.

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