Advanced vibration reduction prefabricated slab adjusting structure and ballast bed construction method based on same

Abstract

The invention discloses a high-grade vibration reduction prefabricated slab adjusting structure and a ballast bed construction method based on the structure, and relates to the technical field of ballast bed construction. The device comprises a first adjusting assembly and a second adjusting assembly, the first adjusting assembly is composed of a swing component and a lifting component, the swing component comprises a first mounting base, a swing oil cylinder and a second mounting base, the lifting component comprises a lifting oil cylinder and a lifting frame, and a supporting base is arranged at the movable end of the lifting oil cylinder; the lifting frame is composed of a mounting plate and a guide seat, a penetrating guide slide way is arranged in the guide seat, a supporting slide beam is arranged on the supporting seat, the supporting slide beam is fixedly connected into the guide slide way when the elevation and the angle of the prefabricated plate are adjusted, and the supporting slide beam is slidably mounted in the guide slide way when the center line position of the prefabricated plate is adjusted. The adjusting device has the beneficial effects that the adjusting device can be suitable for adjusting a linear track prefabricated slab and can also be suitable for adjusting a curve track prefabricated slab.

Description

Technical Field

[0001] This invention relates to the field of track bed construction technology, and in particular to an advanced vibration-damping precast slab adjustment structure and a track bed construction method based on the structure. Background Technology

[0002] To eliminate vibrations and noise generated during track operation, and since ordinary precast slabs lack corresponding vibration damping devices, existing precast slabs are being gradually replaced with vibration-damping track slabs. The core principle of vibration-damping track slabs is to isolate the track load from the foundation structure using elastic elements (such as springs or rubber), forming a vibration isolation system. This reduces the propagation of vibration energy to the surrounding environment, significantly reducing vibration and noise transmission, making it particularly suitable for tracks located near sensitive areas (such as residential areas, hospitals, or schools). Vibration-damping track slabs are generally classified into three types based on their vibration reduction level: ordinary track slabs, high-grade vibration-damping track slabs, and special vibration-damping track slabs. Ordinary track slabs use a one-time cast-in-place structure, resulting in limited vibration reduction; high-grade vibration-damping track slabs improve vibration reduction performance by placing vibration-damping pads between the base and the slab; special vibration-damping track slabs have an internal spring system, providing the best vibration reduction effect. Currently, in urban rail transit construction, high-grade and higher-grade vibration-damping track slabs are typically selected. The construction of existing vibration-damping track beds mostly involves pouring a concrete filling layer between the precast (vibration-damping) slab and the foundation (tunnel shield wall) to fix the two together, thus forming the final track bed structure.

[0003] Before casting precast slabs, their orientation typically needs adjustment to ensure the post-cast track bed meets design requirements. Current adjustment methods usually involve actuators (such as lead screws, fine-tuning devices, and jacks) directly acting on the precast slab. For straight track sections, the precast slab is horizontal, and the actuators move in the same direction as the slab's lifting, allowing for adjustment. However, increasingly more tracks include curved sections, where the precast slabs are tilted. The core function of this tilt is to achieve superelevation. By adjusting the tilt angle of the track bed relative to the horizontal plane, the outer rail is made higher than the inner rail, creating superelevation. Therefore, tilting the precast slabs for curved tracks is a crucial technical measure in track engineering, primarily used to achieve superelevation, balancing the centrifugal force generated when trains pass through curves, and ensuring smooth and safe operation. For curved tracks, the current method of adjustment is mostly to use straight tracks. In this case, the plane of the precast slab is inclined. Compared with ordinary track slabs, high-grade vibration-damping precast slabs are heavier due to the addition of vibration-damping structures. If the adjustment is done directly, it will result in "hard-top" operation, which can easily cause inaccurate adjustment of the precast slabs and, in severe cases, damage to the precast slabs. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an advanced vibration-damping precast slab adjustment structure and a track bed construction method based on the structure, which can be applied to the adjustment of precast slabs for both straight and curved tracks.

[0005] The objective of this invention is achieved through the following technical solution: an adjustment structure for a high-grade vibration-damping precast slab, comprising a first adjustment component for adjusting the elevation of the precast slab and a second adjustment component for adjusting the centerline position of the precast slab. The first and second adjustment components are arranged in pairs on both sides of the precast slab. Each first adjustment component consists of a swinging component and a lifting component. The swinging component includes a first mounting base, a swing cylinder mounted on the first mounting base, and a second mounting base mounted on the output end of the swing cylinder. The first mounting base serves as the mounting foundation for the swing cylinder, and the second mounting base serves as the mounting foundation for the lifting cylinder. Installed on the tunnel shield wall (tunnel shield wall below the precast slab), the lifting component includes a lifting cylinder and a lifting frame. The fixed end of the lifting cylinder is installed on the second mounting seat, and the movable end of the lifting cylinder is provided with a support seat. The lifting frame consists of a mounting plate and a guide seat integrated with the mounting plate. A through guide slide is provided in the guide seat. The mounting plate is fixed to the side wall of the precast slab by a first fastener. A support slide beam that cooperates with the guide slide is provided on the support seat. The support slide beam is placed in the guide slide. Each second adjustment component consists of a horizontally or inclined bidirectional adjusting screw.

[0006] When adjusting the elevation and angle of the precast slab, the supporting slide beam is fixedly connected to the guide slide.

[0007] When adjusting the centerline position of the precast slab, the support slide beam is slidably installed in the guide slide.

[0008] The precast slab has multiple mounting holes on its sidewalls for installing first fasteners, typically lock nuts. Preferably, these mounting holes are symmetrically arranged on the sidewalls of the precast slab with the central axis of the supporting slide beam as the reference. The mounting plate has through holes for the supporting slide beam to pass through. After passing through these through holes, the supporting slide beam is either fixedly connected to the guide rail or slidably installed in the guide rail. Traverse rail supports are symmetrically arranged on the tunnel shield wall (the tunnel shield wall on the side of the precast slab). One end of the bidirectional adjusting screw rests against the sidewall of the precast slab, and the other end rests against the traverse rail support or the tunnel shield wall below the traverse rail support. Traveling rails are laid on the traverse rail supports, allowing related rail trolleys to transfer materials. The supporting slide beam has threaded holes, and the guide seat has slots for exposing the threaded holes. The supporting slide beam is fixedly connected to the guide slide by a second fastener. Since the supporting slide beam has threaded holes, it is a solid beam. The supporting slide beam can be either circular or square, and the shape of the corresponding guide slide matches. It should be noted that since the second fastener needs to fix the supporting slide beam, it at least includes a screw inserted into the threaded hole and a locking nut on the screw to engage the slot. Preferably, the second fastener also includes a pressure plate that presses against the guide seat to fix the supporting slide beam to the guide seat. Preferably, the guide seat, supporting slide beam, and guide slide all have a square structure to facilitate the installation of the pressure plate. If the guide seat, supporting slide beam, and guide slide all have a circular structure, then the corresponding pressure plate can be arc-shaped. This part is a common fixing structure and will not be described in detail here.

[0009] When the supporting sliding beam is fixedly connected to the guide slide, the supporting sliding beam protrudes from the guide slide, and the protruding part of the supporting sliding beam is the connecting part. A connecting beam, such as a flange connection or bolt connection, can also be detachably connected between the connecting parts of two supporting sliding beams. It should be noted that the connecting beam can only be installed when the supporting sliding beam is fixedly connected to the guide slide (including the angle and height adjustment of the precast slab) to further improve the stability of the overall structure. When the supporting sliding beam is slidably installed in the guide slide (centerline adjustment of the precast slab), the supporting sliding beam will move left and right during the centerline adjustment process, and the connecting beam is not installed at this time. The connecting beam can be selectively connected according to the actual situation. The precast slab is also symmetrically provided with multiple lifting holes, and auxiliary support bars are selectively installed in the lifting holes. The bottom end of the auxiliary support bar is supported on the tunnel shield wall. The lifting frame is also provided with an installation plate, and the installation plate is provided with an anti-floating tie rod. One end of the anti-floating tie rod is fixed to the installation plate, and the other end of the anti-floating tie rod is fixed to the tunnel shield wall.

[0010] A method for constructing a track bed with a high-level vibration-damping precast slab adjustment structure includes the following steps:

[0011] S101. The precast slabs are hoisted to the pouring location using a track-laying gantry crane.

[0012] S102. Install a precast slab adjustment structure between the precast slab and the tunnel shield wall to ensure that the upper surface of the second mounting base is horizontal.

[0013] S103. Adjustment of precast slab posture: The precast slab posture includes adjustment of the posture of the precast slab in straight sections or adjustment of the posture of the precast slab in curved sections.

[0014] During the adjustment of the posture of the precast slab in the straight section, the swing cylinder does not move and keeps the upper surface of the second mounting seat in a horizontal state. The support slide beam is fixedly connected to the guide slide. The elevation of the precast slab is adjusted by the lifting cylinder. Then the fasteners between the support slide beam and the guide slide are removed. The support slide beam is slidably installed in the guide slide. The centerline position of the precast slab is adjusted by the second adjustment component.

[0015] During the adjustment of the posture of the precast slab in the curved section, the support slide beam is fixedly connected to the guide slide, the angle of the track bed slab is adjusted by the swing cylinder, and then the elevation of the precast slab is adjusted by the lifting cylinder. Then the fasteners between the support slide beam and the guide slide are removed, and the support slide beam is slidably installed in the guide slide. The centerline position of the precast slab is adjusted by the second adjustment component.

[0016] S104. After the attitude adjustment of the precast slab meets the design requirements, install the anti-floating device.

[0017] S105. Steel Fiber Reinforced Concrete Construction: Steel fiber reinforced concrete is poured through the grouting holes on the precast slab. The steel fiber reinforced concrete is poured 30-50mm higher than the base plate of the precast slab, and the concrete height at the grouting hole is flush with the upper surface of the precast slab. Before pouring, the pouring formwork is laid. During pouring, an immersion vibrator is used for compaction, using vertical point vibration. Horizontal dragging of the vibrator is strictly prohibited. The quality of concrete vibration at the vibration isolator area should be strengthened. The quality of concrete vibration should be determined when the concrete surface no longer settles, begins to show slurry, and no air bubbles overflow, indicating that the concrete is compacted.

[0018] S106. After the steel fiber reinforced concrete is poured, the track bed shall be formed and cured. This forming and curing includes, but is not limited to, covering with geotextile. The curing time with the formwork shall not be less than 24 hours. After demolding, measures such as wrapping with geotextile, covering with a curing film, or spraying with a curing agent shall be taken to maintain moisture and heat. The concrete surface should be kept sufficiently moist, generally every 1-2 hours during the day and every 4 hours at night, with natural curing for no less than 14 days. Existing methods shall be used for this forming and curing, which will not be elaborated upon here.

[0019] Before construction begins, preparations should be made, including cleaning the tunnel shield wall, measuring and setting out the position of the precast slabs, applying the waterproof isolation layer, and transporting the precast slabs.

[0020] The inclination angle of the precast slab in the curved section is 1%-3%. It should be noted that a swing cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy to achieve reciprocating rotation at a limited angle. Its core working principle is to convert the linear motion of the piston into the swing rotation of the output shaft through a specific mechanical structure. Swing cylinders typically have two output ends. In this design, second mounting seats are installed on the two output ends of the swing cylinder, allowing for angle adjustment of the second mounting seats, thereby achieving the final angle adjustment of the precast slab. Furthermore, the swing angle of the swing cylinder should not be less than the inclination angle of the precast slab in the curved section. Generally, the inclination angle of track bed slabs is relatively small; therefore, setting the working swing angle of the swing cylinder within this range is sufficient to avoid the impact of large-angle swings on the precast slab. The working angle of the cylinder can be preset in advance, which will not be elaborated upon here.

[0021] As can be seen, this scheme considers the angle adjustment of the precast slab, adding a swing component and a lifting section. When adjusting the elevation and angle of the precast slab, the support slide beam and guide slide need to be fixed in position. At this time, the support slide beam and guide slide are fixedly connected. When adjusting the centerline position of the precast slab, the swing cylinder and lifting cylinder no longer operate (at this time, the swing cylinder and lifting cylinder support the precast slab), maintaining the elevation and angle position of the precast slab. Then, the support slide beam and guide slide are installed in a sliding manner. If the precast slab is tilted, the second adjustment component is arranged with the same tilt angle. If the precast track slab is horizontal, the second adjustment component can be arranged horizontally. The basic structure of the bidirectional adjusting screw used in the second adjustment component consists of two screws with opposite directions of rotation and an adjusting sleeve that screws into both screws simultaneously. Rotating the adjusting sleeve can make the screws move closer or further apart. One end of one screw rests on the precast track slab, thereby achieving the purpose of adjusting the centerline of the precast track slab. The bidirectional adjusting screw is a commonly used adjusting device in the engineering field, and its specific structure can be achieved using existing methods.

[0022] The beneficial effects of this invention are: by adding a swinging component and a lifting component, and in conjunction with the second adjustment group, it is possible to adjust both the angle and elevation of the precast slab, as well as the centerline of the precast slab, thus achieving the purpose of being applicable to the adjustment of precast slabs on both straight and curved tracks. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic diagram showing the arrangement of the first adjustment component and the second adjustment component of the present invention;

[0025] Figure 3 This is a schematic diagram of the installation structure of the first adjustment component in Embodiment 1 of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure after the second adjustment component is installed in Embodiment 1 of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure after installing the anti-floating tie rod in Embodiment 1 of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure after the connecting beam is installed in Embodiment 1 of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the present invention, which involves installing auxiliary support bars on a precast slab.

[0030] Figure 8 This is a schematic diagram of the surface of the prefabricated slab of the present invention;

[0031] Figure 9 This is a schematic diagram of the adjusted structure in Embodiment 2 of the present invention.

[0032] In the diagram, 1-precast slab, 2-first adjustment component, 3-second adjustment component, 4-traverse rail support, 101-mounting hole, 102-lifting hole, 103-auxiliary support bar, 104-grouting hole, 105-limiting hole, 201-lifting cylinder, 202-lifting frame, 203-support seat, 204-mounting plate, 205-guide seat, 206-first fastener, 207-support slide beam, 208-through hole, 209-strip hole, 210-threaded hole, 211-second fastener, 212-connecting part, 213-mounting plate, 214-anti-floating tie rod, 215-first mounting seat, 216-swing cylinder, 217-second mounting seat, 218-guide slide, 219-connecting beam, 301-bidirectional adjusting screw. Detailed Implementation

[0033] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but the scope of protection of the present invention is not limited to the following description.

[0034] Example 1

[0035] like Figures 1-5As shown, for the construction of straight track sections, an adjustment structure for a high-level vibration-damping precast slab includes a first adjustment component 2 for adjusting the elevation of the precast slab 1 and a second adjustment component 3 for adjusting the centerline position of the precast slab 1. The first adjustment component 2 and the second adjustment component 3 are arranged in pairs on both sides of the precast slab 1. Each first adjustment component 2 consists of a swinging component and a lifting component. The swinging component includes a first mounting base 215, a swinging cylinder 216 mounted on the first mounting base 215, and a second mounting base 217 mounted on the output end of the swinging cylinder 216. The first mounting base 215 is mounted on the tunnel shield wall. The lifting component includes a lifting cylinder 201 and a lifting frame 20. 2. The fixed end of the lifting cylinder 201 is mounted on the second mounting base 217. The movable end of the lifting cylinder 201 is provided with a support base 203. The lifting frame 202 is composed of a mounting plate 204 and a guide seat 205 integrated with the mounting plate 204. A through guide slide 218 is provided in the guide seat 205. The mounting plate 204 is fixed to the side wall of the precast slab 1 by a first fastener 206. A support slide beam 207 is provided on the support base 203 to cooperate with the guide slide 218. The support slide beam 207 is placed in the guide slide 218. Each second adjustment component 3 is composed of a horizontally or inclined bidirectional adjusting screw 301.

[0036] When adjusting the elevation of the precast slab 1, the support slide beam 207 is fixedly connected to the guide slide 218;

[0037] When adjusting the centerline position of the precast slab 1, the support slide beam 207 is slidably installed in the guide slide 218.

[0038] In this scheme, the precast slab 1 is a high-level vibration-damping precast slab, which can achieve a vibration reduction effect of more than 10dB. The precast slab 1 adopts a base plate, vibration damping pad and track bed slab to form an integral structure. The precast slab is 4.7m long, 2.3m wide and 500mm thick.

[0039] The precast slab 1 has multiple mounting holes 101 on its sidewall for installing the first fastener 206. The mounting plate 204 has through holes 208 for supporting the sliding beam 207. The tunnel shield wall has symmetrically arranged traveling rail supports 4. One end of the bidirectional adjusting screw 301 rests against the sidewall of the precast slab 1, and the other end rests against the traveling rail support 4 or the tunnel shield wall below the traveling rail support 4.

[0040] The supporting slide beam 207 is provided with a threaded hole 210, and the guide seat 205 is provided with a slot 209 for exposing the threaded hole 210. The supporting slide beam 207 is fixedly connected to the guide slide 218 by a second fastener 211. Figure 6 As shown, when the support slide beam 207 is fixedly connected to the guide slide 218, the support slide beam 207 protrudes from the guide slide 218. The protruding part of the support slide beam 207 is the connecting part 212. A connecting beam 219 can also be detachably connected between the connecting parts 212 of the two support slide beams 207. Figure 7 As shown, the precast slab 1 is symmetrically provided with multiple lifting holes 102. Auxiliary support bars 103 are selectively installed in the lifting holes 102. The bottom end of the auxiliary support bar 103 is supported on the bottom tunnel shield wall. It should be noted that the auxiliary support bar 103 serves as an auxiliary support, and a flexible hose needs to be fitted over it. After pouring, the auxiliary support bar 103 is removed, leaving the flexible hose in the poured layer. The lifting frame 202 is also provided with an installation plate 213. An anti-floating tie rod 214 is installed in the installation plate 213. One end of the anti-floating tie rod 214 is fixed to the installation plate 213, and the other end is fixed to the tunnel shield wall. A ground anchor hook is pre-reserved on the tunnel shield wall. The bottom of the anti-floating tie rod 214 adopts a hook structure. The hook on the anti-floating tie rod 214 hooks together with the ground anchor hook to form an anti-floating device, thereby preventing the precast slab 1 from floating during concrete pouring.

[0041] A method for constructing a track bed with a high-level vibration-damping precast slab adjustment structure includes the following steps:

[0042] S101. The precast slab 1 is hoisted to the pouring location using a track-laying gantry crane;

[0043] S102. Install the precast slab 1 adjustment structure between the precast slab 1 and the tunnel shield wall. Specifically, first install the first mounting seat 215 on the tunnel shield wall, then install the swing cylinder 216 and the second mounting seat 217 on the first mounting seat 215, and at the same time install the lifting frame 202 on the precast slab 1. Connect the oil circuit to make the swing cylinder 216 move to ensure that the upper surface of the second mounting seat 217 is in a horizontal state. Then install the lifting cylinder 201 on the second mounting seat 217 so that the support slide beam 207 passes through the guide slide 218. Finally, arrange the second adjustment component 3 horizontally between the precast slab 1 and the tunnel shield wall.

[0044] S103. Adjustment of the posture of precast slab 1: The posture of precast slab 1 includes the adjustment of the posture of the straight segment precast slab 1;

[0045] During the adjustment of the posture of the precast slab 1 in the straight section, the swing cylinder 216 does not move and keeps the upper surface of the second mounting base 303 in a horizontal state. The support slide beam 207 is fixedly connected to the guide slide 218. The elevation of the precast slab 1 is adjusted by the lifting cylinder 201. Then, the fasteners between the support slide beam 207 and the guide slide 218 are removed, and the support slide beam 207 is slidably installed in the guide slide 218. The centerline position of the precast slab 1 is adjusted by the second adjustment component 3.

[0046] S104. After the attitude adjustment of the precast slab 1 meets the design requirements, the anti-floating device is installed. The anti-floating device is an anti-floating tie rod 214. For those skilled in the art, the anti-floating tie rod 214 can also be replaced by other types of anti-floating structures.

[0047] S105, Steel Fiber Reinforced Concrete Construction: (e.g.) Figure 8 As shown, steel fiber reinforced concrete is poured through the grouting hole 104 on the precast slab 1. The steel fiber reinforced concrete grade is C40. When the filling concrete has initially set, the limiting steel bar is inserted into the limiting hole 105 of the precast slab 1 and concrete is poured again until it is flush with the slab surface to form a limiting pile for subsequent operations.

[0048] S106. After the steel fiber reinforced concrete is poured, the track bed will be formed and cured.

[0049] During pouring, PTN sealing and waterproofing material is applied to the perimeter of the precast slab 1 where it meets the concrete. The application width is 100mm on each side of the joint, and the thickness is 3mm. A tetrahydroxy complex resin isolation layer is applied to the bottom and sides of the precast slab 1. The isolation layer is sprayed in the factory and shipped with the slab. The isolation layer thickness is 2mm.

[0050] Example 2

[0051] For the construction of curved tracks, a high-level vibration-damping precast slab adjustment structure is provided. The specific form of the adjustment structure is described in Example 1. The inclination angle of the precast slab 1 in the curved section is 1%-3%. When adjusting the elevation and angle of the precast slab 1, as follows... Figure 9 As shown, the support slide beam 207 is fixedly connected to the guide slide 218; when adjusting the centerline position of the precast slab 1, the support slide beam 207 is slidably installed in the guide slide 218.

[0052] A method for constructing a track bed with a high-level vibration-damping precast slab adjustment structure includes the following steps:

[0053] S101. The precast slab 1 is hoisted to the pouring location using a track-laying gantry crane;

[0054] S102. Install the precast plate 1 adjustment structure between the precast plate 1 and the tunnel shield wall to ensure that the upper surface of the second mounting base 217 is horizontal.

[0055] S103. Adjustment of the posture of precast slab 1: The posture of precast slab 1 includes the adjustment of the posture of the curved segment precast slab 1;

[0056] During the adjustment of the posture of the precast slab 1 in the curved section, the support slide beam 207 is fixedly connected to the guide slide 218, the angle of the track bed slab 1 is adjusted by the swing cylinder 216, and then the elevation of the precast slab 1 is adjusted by the lifting cylinder 201. Then the fasteners between the support slide beam 207 and the guide slide 218 are removed, and the support slide beam 207 is slidably installed in the guide slide 218. The centerline position of the precast slab 1 is adjusted by the second adjustment component 3.

[0057] S104. After the attitude adjustment of precast slab 1 meets the design requirements, install the anti-floating device.

[0058] S105. Construction of steel fiber reinforced concrete: Steel fiber reinforced concrete is poured through the grouting holes on the precast slab 1.

[0059] S106. After the steel fiber reinforced concrete is poured, the track bed will be formed and cured.

[0060] The first mounting base 215 and the ground anchor hook of the anti-buoyancy device are directly installed on the tunnel shield wall. The positions of the first mounting base 215 and the ground anchor hook of the anti-buoyancy device are located on both sides of the precast slab 1. For such connection positions, an isolation template is installed before pouring. After the main structure is poured, the first mounting base 215, the ground anchor hook of the anti-buoyancy device and the isolation template are removed, and secondary pouring can be carried out in the isolated area.

[0061] As illustrated above with reference to the accompanying drawings, one embodiment of the present invention has been described by way of example. However, those skilled in the art should understand that various improvements can be made to the embodiment proposed above without departing from the scope of the present invention, or equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the content of the appended claims.

Claims

1. An adjustment structure for a high-level vibration-damping precast slab, comprising a first adjustment component (2) for adjusting the elevation of the precast slab (1) and a second adjustment component (3) for adjusting the centerline position of the precast slab (1), characterized in that, The first adjustment component (2) and the second adjustment component (3) are arranged in pairs on both sides of the precast slab (1). Each first adjustment component (2) consists of a swing component and a lifting component. The swing component includes a first mounting base (215), a swing cylinder (216) mounted on the first mounting base (215), and a second mounting base (217) mounted on the output end of the swing cylinder (216). The first mounting base (215) is mounted on the tunnel shield wall. The lifting component includes a lifting cylinder (201) and a lifting frame (202). The fixed end of the lifting cylinder (201) is mounted on the second mounting base (217). 1) The movable end is provided with a support seat (203). The lifting frame (202) is composed of a mounting plate (204) and a guide seat (205) integrated with the mounting plate (204). The guide seat (205) is provided with a through guide slide (218). The mounting plate (204) is fixed to the side wall of the precast plate (1) by a first fastener (206). The support seat (203) is provided with a support slide beam (207) that cooperates with the guide slide (218). The support slide beam (207) is placed in the guide slide (218). Each second adjustment component (3) is composed of a bidirectional adjusting screw (301) arranged horizontally or inclined. When adjusting the elevation and angle of the precast slab (1), the supporting slide beam (207) is fixedly connected to the guide slide (218); When adjusting the centerline position of the precast slab (1), the support slide beam (207) is slidably installed in the guide slide (218).

2. The advanced vibration-damping precast slab adjustment structure according to claim 1, characterized in that, The precast slab (1) has a plurality of mounting holes (101) on its side wall for mounting the first fastener (206).

3. The advanced vibration-damping precast slab adjustment structure according to claim 1, characterized in that, The mounting plate (204) is provided with a through hole (208) for supporting the slide beam (207) to pass through.

4. The advanced vibration-damping precast slab adjustment structure according to claim 1, characterized in that, The tunnel shield wall is symmetrically arranged with traveling rail supports (4). One end of the bidirectional adjusting screw (301) is against the side wall of the precast slab (1), and the other end of the bidirectional adjusting screw (301) is against the traveling rail support (4) or the tunnel shield wall below the traveling rail support (4).

5. The advanced vibration-damping precast slab adjustment structure according to claim 1, characterized in that, The support slide beam (207) is provided with a threaded hole (210), and the guide seat (205) is provided with a strip hole (209) for exposing the threaded hole (210). The support slide beam (207) is fixedly connected to the guide slide (218) by a second fastener (211).

6. The advanced vibration-damping precast slab adjustment structure according to claim 1, characterized in that, When the support slide beam (207) is fixedly connected to the guide slide (218), the support slide beam (207) protrudes out of the guide slide (218), and the protruding part of the support slide beam (207) is the connecting part (212). A connecting beam (219) can also be detachably connected between the connecting parts (212) of the two support slide beams (207).

7. The advanced vibration-damping precast slab adjustment structure according to claim 1, characterized in that, The precast slab (1) is also symmetrically provided with multiple hoisting holes (102), and auxiliary support bars (103) are selectively installed in the hoisting holes (102). The bottom end of the auxiliary support bars (103) is supported on the tunnel shield wall.

8. The advanced vibration-damping precast slab adjustment structure according to claim 1, characterized in that, The lifting frame (202) is also provided with an installation plate (213), and an anti-floating tie rod (214) is provided in the installation plate (213). One end of the anti-floating tie rod (214) is fixed on the installation plate (213), and the other end of the anti-floating tie rod (214) is fixed on the tunnel shield wall.

9. A method for constructing a track bed with a high-grade vibration-damping precast slab adjustment structure according to any one of claims 1-8, characterized in that, Includes the following steps: S101. The precast slab (1) is hoisted to the pouring location by a track-laying gantry crane; S102. Install the precast plate (1) between the precast plate (1) and the tunnel shield wall to adjust the structure and ensure that the upper surface of the second mounting seat (217) is horizontal. S103. Adjustment of the posture of the precast slab (1): The posture of the precast slab (1) includes the adjustment of the posture of the straight section precast slab (1) or the adjustment of the posture of the curved section precast slab (1); During the adjustment of the posture of the precast slab (1) in the straight section, the swing cylinder (216) does not move and keeps the upper surface of the second mounting base (303) in a horizontal state. The support slide beam (207) is fixedly connected to the guide slide (218). The elevation of the precast slab (1) is adjusted by the lifting cylinder (201). Then the fasteners between the support slide beam (207) and the guide slide (218) are removed. The support slide beam (207) is slidably installed in the guide slide (218). The centerline position of the precast slab (1) is adjusted by the second adjustment component (3). During the adjustment of the posture of the precast slab (1) in the curved section, the support slide beam (207) is fixedly connected to the guide slide (218), the angle of the track bed slab (1) is adjusted by the swing cylinder (216), and then the elevation of the precast slab (1) is adjusted by the lifting cylinder (201). Then the fasteners between the support slide beam (207) and the guide slide (218) are removed, and the support slide beam (207) is slidably installed in the guide slide (218). The centerline position of the precast slab (1) is adjusted by the second adjustment component (3). S104. After the attitude adjustment of the precast slab (1) meets the design requirements, install the anti-floating device. S105, Steel fiber concrete construction: Steel fiber concrete is poured through the grouting holes on the precast slab (1); S106. After the steel fiber reinforced concrete is poured, the track bed will be formed and cured.

10. The track bed construction method according to claim 9, characterized in that, The inclination angle of the precast curved slab (1) is 1%-3%.

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