Fabricated steel spring floating slab track and wet connection construction method

Abstract

The invention particularly discloses an assembly type steel spring floating slab track which comprises a tunnel inverted arch structure, a plurality of long plate floating slab units are arranged at the bottom end in the tunnel inverted arch structure, and the long plate floating slab units are connected end to end. Each long floating slab unit comprises floating slab transition plates located at the two ends and a floating slab standard plate located between the two floating slab transition plates, wet joints are arranged between the floating slab transition plates and the floating slab standard plate, and grooves are formed in the end faces, facing the wet joints, of the floating slab transition plates and the floating slab standard plate and are rough surfaces. In-plate limiting devices are arranged in the middle of the floating slab transition plate and the middle of the floating slab standard plate and used for restraining transverse displacement of the floating slab transition plate and the floating slab standard plate. The plate side transverse limiting device and the plate middle limiting device jointly act, transverse displacement of the floating plate can be restrained, and longitudinal displacement of the floating plate can be restrained within a certain range.

Description

Technical Field

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

[0002] The vibration reduction structure of the track system of urban rail transit projects includes fastener vibration reduction structure, sleeper vibration reduction structure, floating plate track structure and rail embedded track structure. Compared with other types of track vibration reduction measures, the steel spring floating plate vibration reduction track has the advantages of excellent vibration reduction effect, wide damping ratio adjustment range, and convenient maintenance and repair. It can effectively extend the service life of the track and reduce the number of maintenance and repairs of urban rail transit.

[0003] Compared with cast-in-place floating slabs, prefabricated floating slabs improve the construction quality and speed of the slab. However, the prefabricated floating slab is shorter than the cast-in-place floating slab, the continuity of the track stiffness is poor, and the geometric behavior of the track structure is difficult to control. The existing construction method of connecting short slabs into long slabs through wet joints is difficult to control the construction quality of the connection area, the integrity of the slabs after connection is poor, and it is difficult to make rapid adjustments in the face of different joint width changes during construction. In addition, the lateral limiting capacity of the prefabricated floating slab is poor, and how to improve the lateral deformation stability of the structure is a current research difficulty.

[0004] There are currently relevant studies on floating plate track structures 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 periods. Patent CN203475237U discloses an overlapped floating roadbed. In this scheme, two adjacent floating plates transmit the vertical load of the train by extending the platform. The overlap is fixed with bolts through upper and lower through holes. Under large train loads, the bolts are prone to fatigue damage, posing a hidden danger to driving safety. Patent CN113215863A discloses a prefabricated floating plate track structure and a limit device. In this scheme, adjacent floating plates are fixed by the wavy joints set at the head and tail of the floating plates. The plate end limit capacity is weak, which affects driving safety and stability, and has poor adaptability to curved sections. Summary of the invention

[0005] In order to improve the problem that the lateral limiting ability of the prefabricated floating plate is poor and there is a hidden danger of driving safety, the present invention provides an assembled steel spring floating plate track and a wet joint construction method.

[0006] On the one hand, the present invention provides an assembled steel spring floating plate track adopting the following technical solution: A prefabricated steel spring floating plate track comprises a tunnel inverted arch structure, wherein a plurality of long plate floating plate units are arranged at the bottom end inside the tunnel inverted arch structure, wherein the plurality of long plate floating plate units are connected end to end, wherein each long plate floating plate unit comprises floating plate transition plates located at both ends and a floating plate standard plate located between the two floating plate transition plates, wherein a wet joint is arranged between the floating plate transition plate and the floating plate standard plate, wherein grooves are arranged on the end faces of the floating plate transition plate and the floating plate standard plate facing the wet joint and the end faces are rough surfaces, and wherein a mid-plate limit device is arranged in the middle of the floating plate transition plate and the floating plate standard plate for restricting the lateral displacement of the floating plate transition plate and the floating plate standard plate.

[0007] Furthermore, the mid-plate limiting device comprises a limiting plate and limiting bolts, the limiting plate is connected to the inner bottom end of the tunnel invert structure by the limiting bolts, and an inspection cover is arranged on the top of the mid-plate limiting device.

[0008] Furthermore, a limiting elastic buffer layer is arranged on the outer peripheral side of the limiting plate, the outer peripheral side of the limiting elastic buffer layer is tightly attached to the floating plate transition plate or the floating plate standard plate, a protrusion is fixedly connected to the outer peripheral side of the limiting plate, the limiting elastic buffer layer is provided with a groove at a position corresponding to the protrusion, and the protrusion is plugged and fitted into the groove.

[0009] Furthermore, when the width of the limit plate is consistent with the lateral width of the drainage ditch at the bottom of the tunnel, the bottom of the limit plate is in close contact with the drainage ditch, and the limit bolt is laterally connected and fixed to the bottom end of the inner side of the tunnel invert structure.

[0010] Furthermore, when the width of the limit plate is greater than the lateral width of the drainage ditch at the bottom of the tunnel, the bottom of the limit plate is in close contact with the bottom end of the inner part of the tunnel invert structure, and the limit bolt is vertically connected and fixed to the bottom end of the inner part of the tunnel invert structure.

[0011] Furthermore, an integrated wet joint construction template is provided at the wet joint, and the integrated wet joint construction template includes an integrated construction steel template wrapped at the wet joint and fixing bolts, and the two sides of the integrated construction steel template are respectively connected to the floating plate transition plate and the floating plate standard plate through fixing bolts.

[0012] Furthermore, a plurality of transverse steel bars in a direction perpendicular to the track are arranged in the middle of the integrated wet joint construction template, and a plurality of floating plate extension steel bars are arranged on the end faces of the floating plate transition plate and the floating plate standard plate facing the wet joint. The floating plate extension steel bars are U-shaped, and the floating plate extension steel bars are overlapped on the transverse steel bars. The transverse steel bars are tied to the floating plate extension steel bars to form a whole.

[0013] Furthermore, a plate side lateral limiting device is also provided on the side of the floating plate transition plate and the floating plate standard plate, one end of the plate side lateral limiting device is connected to the floating plate transition plate or the floating plate standard plate through a first fastener, and the other end is connected to the inner wall of the tunnel invert structure through a second fastener.

[0014] Furthermore, plate seams are arranged between the long plate floating plate units, a shared vibration isolator is arranged on one side of the plate seam end of the floating plate transition plate close to the tunnel invert structure, the long plate floating plate units are connected by shear hinges, and circular vibration isolators are arranged in both the floating plate transition plate and the floating plate standard plate.

[0015] On the other hand, the present invention provides a wet joint construction method for an assembled steel spring floating plate track, comprising the following steps: Step 1: The connection position between the floating plate transition plate and the floating plate standard plate is prefabricated in the factory to form a groove and the rough surface is designed; Step 2: Before roughly laying the floating slab transition slab and the floating slab standard slab of the long floating slab unit, pre-treat the lower foundation to meet the installation conditions of the built-in circular vibration isolator; Step 3: Position and install the built-in circular vibration isolator, hoist and roughly lay the standard floating plate, integrated construction steel formwork, and floating plate transition plate in sequence, adjust the wet joint length according to the line conditions, and then adjust the length of the assembled long floating plate unit; Step 4: fine-tune the assembled long plate floating plate unit by adjusting the circular vibration isolator, and the floating plate transition plate and the floating plate standard plate are tied and fixed by the floating plate extension steel bars and the transverse steel bars at the wet joint position; Step 5: Bolt holes are preset on the sides and bottom outer sides of the connection position between the floating plate transition plate and the floating plate standard plate, and the integrated construction steel formwork can be connected to the floating plate transition plate and the floating plate standard plate by fixing bolts, and the ends of the floating plate transition plate and the floating plate standard plate are connected; Step 6: pour wet joint UHPC high-strength concrete and perform wet joint curing; Step 7: Install the side lateral limit device and the middle limit device of the board; Step 8. After the wet joint maintenance is completed, the integrated construction steel formwork can be removed and fixed with bolts for reuse, and can also become the external connection structure of the wet joint to further enhance the stability and strength of the connection between the panels.

[0016] In summary, the present invention includes at least one of the following beneficial technical effects: 1. The lateral limit device on the plate side of the present invention can work together with the limit device in the plate, which can effectively restrict the lateral displacement of the floating plate, and restrict the longitudinal displacement of the floating plate within a certain range. The outer side of the limit elastic buffer layer is closely attached to the floating plate transition plate or the floating plate standard plate, which can reduce the impact between the floating plate transition plate and the floating plate standard plate and the plate limit device; the upper part of the plate limit device is provided with an inspection cover plate, which can facilitate the daily inspection and maintenance of the line maintenance personnel.

[0017] 2. The wet joint assembly between the plates of the present invention is composed of a steel frame composed of the external steel bars of the floating plate and the transverse steel bars at the wet joint position, an integrated construction steel formwork and fixing bolts. The side and bottom outer sides of the plate ends are pre-installed with embedded sleeve bolt holes, which can be connected to the integrated construction steel formwork through fixing bolts. The wet joint connection width can be adjusted according to actual needs such as line conditions and local adjustment of plate length, and the transverse steel bars are tied one or more layers along the longitudinal direction of the line according to the wet joint connection width.

[0018] 3. An integrated construction steel formwork is provided at the bottom of the wet joint between the plates of the present invention, which is connected to the floating plate transition plate and the floating plate standard plate end by fixing bolts, and also serves as a mold for pouring high-strength concrete in the wet joint between the plates. At the same time, the wet joint construction is located at the bottom of the plate, participates in tensile stress resistance, and greatly enhances the bearing capacity of the wet joint.

[0019] 4. In the present invention, grooves are arranged on the end faces of the floating slab transition plate and the floating slab standard plate facing the wet joint, and the surface of the groove is roughened on site or roughened in the factory to increase the surface roughness, or a retarder is added during prefabrication in the factory, and a rough surface with aggregate is formed by spraying with a water gun, thereby increasing the connection strength between the prefabricated floating slab and the new and old concrete of the wet joint.

[0020] 5. The end faces of the floating slab transition slab and the floating slab standard slab facing the wet joint are provided with exposed floating slab extension steel bars (U-shaped steel bars) along the plate thickness direction. The U-shaped steel bars connecting the two plate ends at the wet joint position are arranged in a staggered manner and can be flexibly arranged according to the wet joint width on site. At the same time, transverse steel bars are arranged transversely in the staggered range of the U-shaped steel bars to form a steel cage at the wet joint position, thereby further improving the strength of the wet joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the overall structural diagram of the assembled steel spring floating plate track according to an embodiment of the present invention; Figure 2 This is an exploded view of an assembled steel spring floating plate track according to an embodiment of the present invention; Figure 3 It is a schematic diagram of the integrated wet joint construction template of the assembled steel spring floating plate track according to an embodiment of the present invention; Figure 4It is a partial perspective schematic diagram of the wet joint and the steel bar skeleton of the assembled steel spring floating plate track according to the embodiment of the present invention; Figure 5 This is a schematic diagram of a limit device in an assembled steel spring floating plate track plate according to an embodiment of the present invention; Figure 6 This is a schematic diagram of a limit device in an assembled steel spring floating plate track plate according to another embodiment of the present invention; Figure 7 It is a schematic diagram of a lateral limit device for a prefabricated steel spring floating plate track plate according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the standard plate structure of the assembled steel spring floating plate track floating plate according to an embodiment of the present invention; Fig. 9 This is a schematic diagram of the structure of the floating plate transition plate of the assembled steel spring floating plate track according to an embodiment of the present invention; Fig.10 This is a construction flow chart of an assembled steel spring floating plate track and a wet joint construction method according to an embodiment of the present invention; Figure numerals: 1. floating slab standard plate; 2. floating slab transition plate; 3. rail; 4. fastener system; 5. wet joint; 6. integrated wet joint construction template; 7. slab side lateral limit device; 8. slab center limit device; 9. shear hinge; 10. grounding terminal; 11. shared vibration isolator; 12. circular vibration isolator; 13. tunnel invert structure; 6-1. Integrated construction steel formwork; 6-2. Fixing bolts; 6-3. Extended reinforcement of floating slab; 6-4. Transverse reinforcement; 7-1, card slot; 7-2, horizontal fixing plate; 7-3, second fastener; 7-4, first fastener; 8-1. Check the cover plate; 8-2. Limit elastic buffer layer; 8-3. Limit plate; 8-4. Limit bolt. DETAILED DESCRIPTION

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] Example: Reference Figure 1-Figure 10 In one aspect, the present invention provides an assembled steel spring floating plate track. Figure 1 , Figure 2As shown, the assembled steel spring floating plate track includes a floating plate standard plate 1, a floating plate transition plate 2, a rail 3, a fastener system 4, a wet joint 5, an integrated wet joint construction template 6, a plate side lateral limit device 7, a plate middle limit device 8, a shear hinge 9, a grounding terminal 10, a shared vibration isolator 11, a circular vibration isolator 12, and a tunnel invert structure 13. A plurality of long plate floating plate units are arranged at the bottom end of the tunnel invert structure 13. The plurality of long plate floating plate units are connected end to end. A long floating plate unit includes floating plate transition plates 2 located at both ends and a floating plate standard plate 1 located between the two floating plate transition plates 2. A wet joint 5 is arranged between the floating plate transition plate 2 and the floating plate standard plate 1. The end surfaces of the floating plate transition plate 2 and the floating plate standard plate facing the wet joint 5 are provided with grooves and are rough surfaces. A mid-plate limiting device 8 is arranged in the middle of the floating plate transition plate 2 and the floating plate standard plate 1 to constrain the lateral displacement of the floating plate transition plate 2 and the floating plate standard plate 1.

[0028] Furthermore, if Figure 5 As shown, the plate-mid limit device 8 includes a limit plate 8-3 and a limit bolt 8-4, and the limit plate 8-3 is connected to the inner bottom end of the tunnel invert structure 13 by the limit bolt 8-4. An inspection cover plate 8-1 is arranged on the top of the plate-mid limit device 8, and the inspection cover plate 8-1 is convenient for daily inspection and maintenance by line maintenance personnel. A limit elastic buffer layer 8-2 is arranged on the outer peripheral side of the limit plate 8-3, and the outer peripheral side of the limit elastic buffer layer 8-2 is closely attached to the floating plate transition plate 2 or the floating plate standard plate 1, which can reduce the impact between the floating plate transition plate 2 and the floating plate standard plate 1 and the plate-mid limit device 8. A protrusion is fixed on the outer peripheral side of the limit plate 8-3, and a groove is arranged on the limit elastic buffer layer 8-2 at a position corresponding to the protrusion, and the protrusion is plugged and adapted to the groove. When the width of the limiting plate 8-3 is consistent with the transverse width of the drainage ditch at the bottom of the tunnel, the bottom of the limiting plate 8-3 is in close contact with the drainage ditch, and the limiting bolt 8-4 is transversely connected and fixed to the bottom end of the tunnel invert structure 13.

[0029] Further, in another embodiment, if Figure 6 As shown, when the width of the limit plate 8-3 is greater than the lateral width of the drainage ditch at the bottom of the tunnel, the bottom of the limit plate 8-3 is in close contact with the inner bottom end of the tunnel inverted arch structure 13, and the limit bolt 8-4 is vertically connected and fixed to the inner bottom end of the tunnel inverted arch structure 13.

[0030] Furthermore, if Figure 3As shown, an integrated wet joint construction template 6 is provided at the wet joint 5. The integrated wet joint construction template 6 includes an integrated construction steel template 6-1 and fixing bolts 6-2 wrapped around the wet joint 5. Both sides of the integrated construction steel template 6-1 are respectively connected to the floating plate transition plate 2 and the floating plate standard plate 1 through fixing bolts 6-2. A plurality of transverse steel bars 6-4 in a direction perpendicular to the track are provided in the middle of the integrated wet joint construction template 6. A plurality of floating plate extension steel bars 6-3 are provided on the end surfaces of the floating plate transition plate 2 and the floating plate standard plate 1 facing the wet joint 5. The floating plate extension steel bars 6-3 are U-shaped. The floating plate extension steel bars 6-3 are overlapped on the transverse steel bars 6-4. The transverse steel bars 6-4 are tied together with the floating plate extension steel bars 6-3 to form a whole. As shown Figure 4 As shown in (a), when the wet joint width is small, a layer of transverse steel bars 6-4 is arranged in the vertical direction at the wet joint position, and the floating slab extension steel bars 6-3 are tied and connected with the wet joint 5 transverse steel bars 6-4 to form a steel skeleton.

[0031] Further, in another embodiment, if Figure 4 As shown in (b), when the wet joint width is large, multiple layers of transverse reinforcement 6-4 are arranged at the wet joint 5 position.

[0032] Furthermore, if Figure 7 As shown, the floating plate transition plate 2 and the floating plate standard plate 1 are also provided with a plate side transverse limiting device 7, one end of the plate side transverse limiting device 7 is connected to the floating plate transition plate 2 or the floating plate standard plate 1 through a first fastener 7-4, and the other end is connected to the inner wall of the tunnel inverted arch structure 13 through a second fastener 7-3. The plate side transverse limiting device 7 includes a slot 7-1 and a transverse fixing plate 7-2, the transverse fixing plate 7-2 is constrained inside the slot 7-1 through mold processing, and the transverse fixing plate 7-2 is closely attached to the slot 7-1 in the transverse direction of the line, and can move freely within a certain range along the longitudinal and longitudinal directions of the line. The slot 7-1 and the long plate floating plate unit can be connected using the floating plate hoisting hole, or the plate side transverse limiting device 7 mounting hole can be flexibly set on the side of the long plate floating plate unit for connection. In this example, the slot 7-1 and the long plate floating plate unit are connected by bolts, and the transverse fixing plate 7-2 and the tunnel inverted arch structure 13 are fixed by expansion bolts 7-3. The first fastener 7 - 4 is a bolt, and the second fastener 7 - 3 is an expansion bolt.

[0033] Furthermore, if Figure 1 , Figure 2 As shown, plate seams are arranged between the long plate floating plate units, a shared vibration isolator 11 is arranged on one side of the plate seam end of the floating plate transition plate 2 close to the tunnel invert structure 13, the long plate floating plate units are connected by shear hinges 9, and circular vibration isolators 12 are arranged in both the floating plate transition plate 2 and the floating plate standard plate 1.

[0034] Furthermore, if Figure 1 , Figure 2 , Figure 8 , Fig. 9 As shown, the end faces of the floating slab transition plate 2 and the floating slab standard plate 1 facing the wet joint 5 are provided with grooves, and the end faces of the floating slab transition plate 2 and the floating slab standard plate 1 and the groove surface can be roughened on site or roughened in the factory to increase the surface roughness, thereby increasing the connection strength between the new and old concrete. The end faces can also be added with a retarder during factory prefabrication, and a rough surface with aggregates can be formed by spraying with a water gun, thereby increasing the connection strength between the new and old concrete.

[0035] In specific implementation, the floating plate standard plate 1 and the floating plate transition plate 2 are both 3600mm long, 2600mm wide and 340mm high. The floating plate transition plate 2 is close to the tunnel invert structure 13 at the plate seam end, and a shared vibration isolator installation space and a shear hinge installation hole are set symmetrically along the center line of the line. The specific dimensions of the shared vibration isolator installation space are 270mm long, 350mm wide and 100mm high. The floating plate standard plate 1 and the floating plate transition plate 2 are both equipped with built-in circular vibration isolator outer sleeves. The longitudinal arrangement spacing of the circular vibration isolator 12 is twice the spacing of the fastener 2, 1200mm, and the horizontal arrangement spacing is 1860mm. Two pairs are arranged in total, and the whole is located outside the rail 3, which is convenient for later maintenance and repair.

[0036] In specific implementation, the assembled steel spring floating plate track is assembled with N standard floating plate plates 1 (N≥0) with a standard length of 3.6m (4.8m) + 2 floating plate transition plates 2, and connected with cast-in-place wet joints 5 to form long floating plate units with a modulus of 3.6m (4.8m). Plate seams are reserved between the long floating plate units, and they are connected through square shared vibration isolators 12 and shear hinges 9 to ensure smooth and coordinated deformation of adjacent floating plate long plate units, effectively improve driving safety and stability, and meet the special vibration reduction requirements of rail transit. A grounding terminal 10 is set on each side of the floating plate transition plate 2 adjacent to the other long floating plate units. The fastener system 4 uses a fastener type that matches the floating plate long plate unit, and the fastener spacing is 600mm.

[0037] like Fig.10 As shown, on the other hand, the present invention provides a wet joint construction method for an assembled steel spring floating plate track, comprising the following steps: Step 1: The connection position between the floating slab transition plate 2 and the floating slab standard plate 1 is prefabricated in the factory to form a groove and design a rough surface to improve the connection strength between the wet joint 5 and the new and old concrete of the floating slab; Step 2: Before roughly laying the floating plate transition plate 2 and the floating plate standard plate 1 of the long floating plate unit, pre-treat the lower foundation to meet the installation conditions of the built-in circular vibration isolator 12; Step 3: Position and install the built-in circular vibration isolator 12, and hoist and roughly lay the floating plate standard plate 1, the integrated construction steel formwork 6-1, and the floating plate transition plate 2 in sequence, and adjust the length of the wet joint 5 according to the line conditions, and then adjust the length of the assembled long plate floating plate unit; Step 4: fine-tune the assembled long plate floating plate unit by adjusting the circular vibration isolator 12, and the floating plate transition plate 2 and the floating plate standard plate 1 are tied and fixed by the floating plate extension steel bars 6-3 and the transverse steel bars 6-4 at the wet joint 5; Step 5: Bolt holes are preset on the side and bottom outer sides of the connection position between the floating plate transition plate 2 and the floating plate standard plate 1, and the integrated construction steel formwork 6-1 can be connected to the floating plate transition plate 2 and the floating plate standard plate 1 by fixing bolts 6-2, and the ends of the floating plate transition plate 2 and the floating plate standard plate 1 are connected; Step 6: pouring wet joint UHPC high-strength concrete and performing wet joint 5 curing; Step 7: Install the plate side lateral limit device 7 and the plate middle limit device 8; Step 8: After the wet joint maintenance is completed, the integrated construction steel formwork 6-1 can be removed from the fixing bolts 6-2 for reuse, and can also become the external connection structure of the wet joint 5 to further enhance the stability and strength of the connection between the plates.

[0038] The plate side lateral limiting device of the present invention can work together with the plate middle limiting device, can effectively constrain the lateral displacement of the floating plate, and constrain the longitudinal displacement of the floating plate within a certain range. The outer side of the limiting elastic buffer layer plate is closely attached to the floating plate transition plate and the floating plate standard plate, which can reduce the impact between the floating plate transition plate and the floating plate standard plate and the plate middle limiting device; the upper part of the plate middle limiting device is provided with an inspection cover plate, which can facilitate daily inspection and maintenance by line maintenance personnel.

[0039] 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. An assembled steel spring floating plate track, comprising a tunnel invert structure, characterized in that: A plurality of long-plate floating plate units are arranged at the bottom end of the tunnel invert structure, and the plurality of long-plate floating plate units are connected end to end, and each long-plate floating plate unit comprises floating plate transition plates at both ends and a floating plate standard plate between the two floating plate transition plates, a wet joint is arranged between the floating plate transition plate and the floating plate standard plate, and grooves are arranged on the end faces of the floating plate transition plate and the floating plate standard plate facing the wet joint and are rough surfaces, and a mid-plate limit device is arranged in the middle of the floating plate transition plate and the floating plate standard plate for constraining the lateral displacement of the floating plate transition plate and the floating plate standard plate.

2. The assembled steel spring floating plate track according to claim 1, characterized in that: The mid-plate limiting device comprises a limiting plate and limiting bolts, the limiting plate is connected to the inner bottom end of the tunnel invert structure by the limiting bolts, and an inspection cover is arranged on the top of the mid-plate limiting device.

3. The assembled steel spring floating plate track according to claim 2, characterized in that: A limiting elastic buffer layer is arranged on the outer peripheral side of the limiting plate, and the outer peripheral side of the limiting elastic buffer layer is tightly attached to the floating plate transition plate or the floating plate standard plate. A protrusion is fixedly connected to the outer peripheral side of the limiting plate, and the limiting elastic buffer layer is provided with a groove at a position corresponding to the protrusion, and the protrusion is plugged and adapted to the groove.

4. The assembled steel spring floating plate track according to claim 3, characterized in that: When the width of the limit plate is consistent with the transverse width of the drainage ditch at the bottom of the tunnel, the bottom of the limit plate is closely attached to the drainage ditch, and the limit bolt is laterally connected and fixed to the bottom end of the inner side of the tunnel invert structure.

5. The assembled steel spring floating plate track according to claim 4, characterized in that: When the width of the limit plate is greater than the lateral width of the drainage ditch at the bottom of the tunnel, the bottom of the limit plate is in close contact with the inner bottom end of the tunnel invert structure, and the limit bolt is vertically connected and fixed to the inner bottom end of the tunnel invert structure.

6. The assembled steel spring floating plate track according to claim 1, characterized in that: An integrated wet joint construction template is provided at the wet joint, and the integrated wet joint construction template includes an integrated construction steel template wrapped at the wet joint and fixing bolts, and the two sides of the integrated construction steel template are respectively connected to the floating plate transition plate and the floating plate standard plate through fixing bolts.

7. The assembled steel spring floating plate track according to claim 6, characterized in that: A plurality of transverse steel bars in a vertical track direction are arranged in the middle of the integrated wet joint construction template, and a plurality of floating plate extension steel bars are arranged on the end faces of the floating plate transition plate and the floating plate standard plate facing the wet joint. The floating plate extension steel bars are U-shaped, and the floating plate extension steel bars are overlapped on the transverse steel bars. The transverse steel bars are tied with the floating plate extension steel bars to form a whole.

8. The assembled steel spring floating plate track according to claim 1, characterized in that: The floating plate transition plate and the floating plate standard plate are also provided with plate side lateral limiting devices on their sides. One end of the plate side lateral limiting device is connected to the floating plate transition plate or the floating plate standard plate through a first fastener, and the other end is connected to the inner wall of the tunnel invert structure through a second fastener.

9. The assembled steel spring floating plate track according to claim 1, characterized in that: Plate seams are arranged between the long plate floating plate units, a shared vibration isolator is arranged on one side of the plate seam end of the floating plate transition plate close to the tunnel invert structure, the long plate floating plate units are connected by shear hinges, and circular vibration isolators are arranged in both the floating plate transition plate and the floating plate standard plate.

10. A wet joint construction method for an assembled steel spring floating plate track according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: The connection position between the floating plate transition plate and the floating plate standard plate is prefabricated in the factory to form a groove and the rough surface is designed; Step 2: Before roughly laying the floating slab transition slab and the floating slab standard slab of the long floating slab unit, pre-treat the lower foundation to meet the installation conditions of the built-in circular vibration isolator; Step 3: Position and install the built-in circular vibration isolator, hoist and roughly lay the standard floating plate, integrated construction steel formwork, and floating plate transition plate in sequence, adjust the wet joint length according to the line conditions, and then adjust the length of the assembled long floating plate unit; Step 4: fine-tune the assembled long plate floating plate unit by adjusting the circular vibration isolator, and the floating plate transition plate and the floating plate standard plate are tied and fixed by the floating plate extension steel bars and the transverse steel bars at the wet joint position; Step 5: Bolt holes are preset on the sides and bottom outer sides of the connection position between the floating plate transition plate and the floating plate standard plate, and the integrated construction steel formwork can be connected to the floating plate transition plate and the floating plate standard plate by fixing bolts, and the ends of the floating plate transition plate and the floating plate standard plate are connected; Step 6: pour wet joint UHPC high-strength concrete and perform wet joint curing; Step 7: Install the side lateral limit device and the middle limit device of the board; Step 8. After the wet joint maintenance is completed, the integrated construction steel formwork can be removed and fixed with bolts for reuse, and can also become the external connection structure of the wet joint to further enhance the stability and strength of the connection between the panels.

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