Fluid-isolated vibration-damping track bed and method of construction thereof

Abstract

The present application relates to a kind of damping bed based on fluid isolation and its construction method.The existing damping measure is limited in reducing track bed noise and vibration.The upper part of the present application is provided with anchoring block groove, steel spring, bag and wing angle anchoring block are arranged in anchoring block groove;Steel spring is located in the bottom of anchoring block groove, wing angle anchoring block is located above steel spring, bag is clamped between steel spring and wing angle anchoring block;Wing angle anchoring block is fixed with the sleeper above by bolt.The present application is provided with wing angle anchoring block below rail and sleeper, bag is arranged in the lower part of wing angle anchoring block and is injected with specific fluid, rail, sleeper, wing angle anchoring block and ordinary track bed are effectively isolated by fluid with certain pressure, effectively avoid the physical hard contact between conventional track, track bed and lining structure, wing angle anchoring block above is effectively isolated based on the idea of soft against hard, simple structure, convenient process, vibration isolation effect is controllable and significant.

Description

Technical Field

[0001] This invention relates to the field of track engineering technology, specifically to a vibration-damping track bed based on fluid isolation and its construction method. Background Technology

[0002] Urban rail transit typically operates in core urban areas, surrounded by dense structures and in sensitive environments. In recent years, noise and vibration from urban rail trains have become a major source of urban environmental pollution. In some large cities, the inability to effectively control train noise and vibration has even led to the demolition of nearby residential buildings. Guided by the goals of green urban rail, environmentally friendly infrastructure, and high-quality development, the environmental pollution caused by train wheel-rail vibration must be addressed effectively and promptly.

[0003] Given that the basic properties and performance of existing steel wheels and rails cannot be effectively improved, even with the highest-grade steel spring vibration-damping track bed, the reduction effect on the vibration frequency caused by train operation is only around 20Hz. Therefore, there is an urgent need to design new vibration-damping track bed structures, especially when the line passes by sensitive buildings and structures such as hospitals, schools, and laboratories, to further reduce noise and vibration impacts. Summary of the Invention

[0004] The purpose of this invention is to provide a vibration-damping track bed based on fluid isolation and its construction method, so as to solve the problem that existing vibration reduction measures have limited effectiveness in reducing track bed noise and vibration.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] The vibration-damping track bed based on fluid isolation has an anchor block groove in the upper middle part, and a steel spring, a bladder, and an anchor block with wing corners are installed in the anchor block groove.

[0007] The steel spring is located at the bottom of the groove of the anchor block, the winged anchor block is located above the steel spring, and the pouch is sandwiched between the steel spring and the winged anchor block;

[0008] The winged corner anchor block is fixed to the sleeper above it by bolts.

[0009] Furthermore, the upper space of the anchor block groove is larger than the lower space, and the outer periphery of the winged anchor block is provided with a protruding wing, which is located in the upper space of the anchor block groove.

[0010] Furthermore, a wedge-shaped block is installed on the upper side of the groove of the anchor block, and the bottom surface of the wedge-shaped block is an inclined surface;

[0011] The top surface of the wing corner of the wing-angled anchor block is also an inclined surface. The wedge block is located above the wing-angled anchor block, and the inclined surface of the wedge block matches the inclined surface of the wing corner.

[0012] Furthermore, the top surface of the wedge block is provided with a recessed hand hole, and an oblique reserved bolt hole is provided between the hand hole and the side surface of the wedge block;

[0013] The side of the track bed that connects with the wedge block is provided with a pre-embedded sleeve. The wedge block is installed on the upper side of the groove of the anchor block by inserting a bolt assembly into the reserved bolt hole and the pre-embedded sleeve.

[0014] Furthermore, the bag is connected to a horizontal grouting pipe, which is laid in a pre-set pipe within the track bed, and the grouting port of the grouting pipe is located on the transverse side of the track bed.

[0015] Furthermore, a one-way valve is installed on the grouting pipe.

[0016] Furthermore, the two transverse bladders are connected in series via the grouting pipe.

[0017] Furthermore, a steel plate is provided on the top of the steel spring;

[0018] The steel spring and the pouch are separated by a steel plate, which slides freely within the groove of the anchor block.

[0019] Furthermore, the steel spring, the bladder, and the winged corner anchor block constitute a vibration damping assembly, and two sets of vibration damping assemblies are provided under each sleeper in a symmetrical manner.

[0020] On the other hand, a method for constructing a vibration-damping track bed based on fluid isolation is provided, the method comprising:

[0021] Precast wedge blocks and winged anchor blocks;

[0022] Tunnel excavation construction forms the tunnel lining;

[0023] Construct the track bed foundation at the bottom of the tunnel arch;

[0024] The track bed reinforcement is tied above the track bed foundation, the track bed with pre-reserved anchor block grooves is poured, side ditches are reserved on both sides, and corresponding channels for grouting pipes are reserved in advance at the corresponding positions.

[0025] A steel spring and a steel plate are placed inside the groove of the anchor block;

[0026] Place grouting bags on the steel plate and install grouting pipes;

[0027] Place the winged corner anchor block above the bag, at which point the top of the winged corner anchor block is flush with the top of the track bed;

[0028] Install a wedge block on the upper side of the anchor block groove;

[0029] The sleeper is bolted to the top of the winged corner anchor block;

[0030] The rails are installed above the sleepers using fasteners;

[0031] By injecting fluid into the bladder, the wing angle and the inclined surface of the wedge block are brought into direct contact, and the wing angle anchor block reaches its maximum vertical height; the relative displacement between the wing angle and the wedge block is the height to which the wing angle anchor block and the rail system rise.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] This invention provides a vibration-damping track bed based on fluid isolation and its construction method. Winged anchor blocks are installed below the rails and sleepers. A bladder is placed at the bottom of the winged anchor blocks and injected with a specific fluid. The rails, sleepers, winged anchor blocks, and ordinary track bed are effectively isolated by the pressurized fluid, effectively avoiding physical hard contact between the conventional track, track bed, and lining structure. Based on the principle of "using flexibility to overcome rigidity," the upper winged anchor blocks and sleepers are effectively isolated. The structure is simple, the process is convenient, and the vibration isolation effect is controllable and significant. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a typical cross-sectional layout diagram of tunnel lining and track bed.

[0036] Figure 2 This is a schematic diagram of the track bed before the bag is filled.

[0037] Figure 3 This is a schematic diagram of the track bed after the bags are filled.

[0038] Figure 4 This is a schematic diagram of the connection between the wedge block and the track bed.

[0039] Figure 5 This is a detailed drawing of the bolt.

[0040] Figure 6 This is a plan view of the grouting bag containing the grouting pipe.

[0041] The diagram is labeled as follows:

[0042] 1-Tunnel lining, 2-Slab foundation, 3-Slab, 31-Embedded sleeve, 4-Side ditch, 5-Central ditch, 6-Rail, 7-Fastener, 8-Sleeve, 9-Bolt, 10-Anchor block groove, 11-Wedge block, 111-Handhole, 112-Reserved bolt hole, 113-Bolt assembly, 12-Anchor block with wing, 13-Grouting pipe, 14-Bag, 15-Steel plate, 16-Steel spring, 17-Hexagonal nut, 18-Threaded rod, 19-Screw. Detailed Implementation

[0043] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0044] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "setting," etc., should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] In a specific implementation, the direction of the line is defined as longitudinal, and the direction perpendicular to the line is defined as transverse.

[0047] like Figure 1 During railway tunnel excavation, after the tunnel lining 1 is formed, a track bed needs to be constructed at the arch. Specifically, a track bed foundation 2 is poured at the bottom of the arch of the tunnel lining 1, with a central trench 5 reserved. Then, the track bed 3 is constructed above the track bed foundation 2, and sleepers 8 are installed on the top surface of the track bed 3. This invention provides a vibration-damping track bed based on fluid isolation, which, as a novel track bed structure, possesses significant noise reduction and vibration damping functions.

[0048] like Figure 2The track bed 3 has an anchoring block groove 10 in its upper middle part, with the upper space of the groove being larger than the lower space. A steel spring 16, a bladder 14, and a winged anchor block 12 are installed within the anchoring block groove 10. The steel spring 16 is located at the bottom of the groove, the winged anchor block 12 is located above it, and the bladder 14 is sandwiched between the steel spring 16 and the winged anchor block 12. A steel plate 15 is installed on top of the steel spring 16, and the edge of the steel plate 15 is fixed to the track bed 3. The steel plate 15 can slide freely up and down within the anchoring block groove 10, effectively isolating the reserved groove space where the steel spring 16 and the bladder 14 are located, forming a physically vertically integrated structure. This effectively isolates the instantaneous pressure caused by the micro-vibrations of train operation. A protruding wing is provided on the upper outer side of the winged anchor block 12, located within the upper space of the anchoring block groove 10. A wedge-shaped block 11 is installed on the upper side of the anchoring block groove 10, and the bottom surface of the wedge-shaped block 11 is inclined. The top surface of the wing angle of the wing-angled anchoring block 12 is also inclined. The wedge-shaped block 11 is located above the wing-angled anchoring block 12, and the inclined surface of the wedge-shaped block 11 matches the inclined surface of the wing angle. Figure 4 The top surface of the wedge block 11 is provided with a recessed hand hole 111, and the wedge block 11 is provided with an obliquely oriented reserved bolt hole 112. A pre-embedded sleeve 31 is provided in the track bed 3 on the side of the anchor block groove 10. The wedge block 11 is installed onto the upper side of the anchor block groove 10 by inserting the bolt assembly 113 into the reserved bolt hole 112 and the pre-embedded sleeve 31. Figure 5 The bolt assembly 113 consists of a hexagonal nut 17, a screw 18 and a bolt 19. The length of the bolt 19 matches that of the pre-embedded sleeve 31. Each wedge block 11 is fixedly connected by at least two bolt assemblies 113.

[0049] The winged anchor block 12 is fixed to the sleeper 8 above it by bolts 9. The steel spring 16, the pocket 14, and the winged anchor block 12 constitute a vibration damping assembly. Two sets of vibration damping assemblies are installed symmetrically on both sides below each sleeper 8. The rail 6 is effectively connected to the sleeper 8 by fasteners 7. The rail 6, fasteners 7, and sleeper 8 are all conventional train running components. Fasteners 7 could be considered to be type DZⅢ fasteners.

[0050] like Figure 2 and Figure 3 The upper surfaces of the two wing-shaped anchor blocks 12 are downwardly inclined, with a slope matching the slope of the bottom of the wedge block 11. The upper limit displacement of the wing-shaped anchor block 12 is determined by the position of the bottom slope of the wedge block 11, and its lower limit displacement is determined by the position of the bottom of the reserved anchor block groove 10. The vertical displacement adjustment is achieved by injecting a specific fluid into the bladder 14. The vertical movement range of the wing-shaped anchor block 12 within the anchor block groove 10 matches the maximum distance from the bottom of the wedge block 11 to the side of the wing.

[0051] In addition, cork pads can be installed at the wing corners of the anchor block 12, the upper and lower inclined edges at the junction of the wedge block 11, and the perimeter of the block to prevent the concrete contact area from breaking and to increase the sealing effect of the contact area.

[0052] The bag 14 can be made of sheepskin material with a certain degree of elasticity, possessing high extensibility and high strength. The bag 14 is connected to a grouting pipe 13, which is installed within a pre-set pipeline within the track bed 3. The grouting port of the grouting pipe 13 is located on the transverse side of the track bed 3. A one-way valve is installed on the grouting pipe 13. Two horizontally oriented bags 14 can be connected in series via the grouting pipe 13, such as... Figure 6 Two bags 14 can be grouped together. The longitudinal spacing of the bags 14 is consistent with the longitudinal arrangement spacing of the sleepers 8 in the tunnel, generally considered to be 600mm. A specific fluid can be injected into the bags 14, such as reclaimed water with antifreeze function. After the fluid pressure rises to a certain stage, the winged anchor block 12 is slowly lifted up with the upper rail system until the wedge block 11 and the wing are in close contact.

[0053] A small liquid pressure monitor can be installed at the connection between the bladder 14 and the grouting pipe 13 to monitor the pressure inside the bladder 14 in real time and transmit it wirelessly to the ground monitoring station. Based on the pressure monitoring, fluid can be injected into the bladder 14 in a timely manner to ensure that the wing corner of the winged anchor block 12 is in close contact with the wedge block 11.

[0054] Under the combined action of pressurized fluid and steel spring, the above structure has significant vibration reduction and noise reduction functions. The horizontal displacement of the rail system is achieved by the constraint of the pre-reserved groove in the track bed by the winged anchor block. During train operation, the low-frequency vibration transmitted from the rail is absorbed and dissipated by the fluid with a certain pressure below the anchor block. At the same time, the vibration transmitted by the fluid to the steel spring below will be greatly reduced or dissipated. The specific vibration reduction can be further adjusted by adjusting the expansion volume of the bag and the fluid pressure as needed to achieve the goal of effectively isolating the low-frequency vibration of train operation by the new type of vibration-damping track bed.

[0055] In the above structure, bolts, grouting pipes, steel plates, steel springs and rail systems can all be made of Q235 steel, sleepers, track bed (including subbase) and tunnel lining structures can be made of C35 or higher grade concrete, and their internal reinforcement can be made of ordinary HRB335 steel bars. Rail 6 fasteners 7 can be made of composite materials or rubber materials as needed.

[0056] The construction method for the aforementioned track bed specifically includes the following steps:

[0057] Step 1: Based on the shape and size of the anchoring block groove 10 as required by the design, prefabricate the wedge block 11 and the winged anchor block 12 in the factory. The plane width of a single winged anchor block 12 is generally not less than 1 / 3 of the width of the segmented sleeper 8, which can be considered as 200mm. The wing angle of the winged anchor block 12 and the width of the wedge block 11 are generally about 60-70mm. The angle between the inclined surface of the wing angle and the horizontal plane can generally be considered as 30-60°, which is conducive to "interlocking".

[0058] Step 2: Carry out shield tunneling or other construction methods according to design requirements to form the tunnel lining 1;

[0059] Step 3: After the tunnel is completed, construct the track bed foundation 2 within a certain range of the tunnel arch bottom area, and reserve the center ditch 5 for the track bed foundation 2;

[0060] Step 4: Based on the dimensions of the overall track bed 3 segments and the positions of the anchor block grooves 10, tie the reinforcing steel bars of the track bed 3 on site and pour the overall track bed 3 with the reserved anchor block grooves 10. The cross-section of the anchor block groove 10 is an open groove structure. The length of a single overall track bed 3 segment is generally considered to be 25m, and the longitudinal spacing of the anchor block grooves 10 is generally considered to be 600mm. Along the longitudinal direction of the tunnel, the distance from the center of the anchor block groove 10 to the edge of a single track bed 3 segment is controlled at 0.5m. A total of 25 rows of anchor block grooves 10 can be arranged on a single track bed 3 segment.

[0061] Step 5: According to the design requirements, steel spring 16 and steel plate 15 need to be placed in advance at the middle of the depth of the anchor block groove 10 to ensure that the steel plate 15 can slide freely up and down in the anchor block groove 10 around its perimeter; a hole for later insertion of grouting pipe 13 should be reserved above the steel plate 15 at the middle of the groove.

[0062] Step 6: According to the design requirements, side ditches 4 are formed at the junctions of the track bed 3 and the tunnel lining 1 on both sides;

[0063] Step 7: Place a bag 14 on the steel plate 15 inside the anchor block groove 10. The plane area of ​​the bag 14 is equivalent to the bottom cross-section of the anchor block groove 10. A one-way valve is installed on the pipeline between the bag 14 and the grouting pipe 13. Then, place the pre-made winged anchor blocks 12 in the anchor block grooves 10 on both sides of the track bed 3, with 4 winged anchor blocks 12 placed in each row.

[0064] Step 8: Fix the pre-fabricated wedge block 11 to the corresponding position of the track bed 3 above the anchor block groove 10 using bolt assembly 113; the bolt assembly 113 consists of hexagonal nut 17, screw 18 and screw 19. The hand hole 111 and the reserved bolt hole 112 on the wedge block 11 need to be reserved in advance during the factory prefabrication stage along with the wedge block 11. At the same time, the pre-embedded sleeve 31 for inserting the bolt assembly 113 needs to be pre-embedded in the corresponding position of the track bed 3.

[0065] Step 9: Screw the separate sleeper 8 and the upper steel pad together into the winged corner anchor block 12 with bolts 9. Each sleeper 8 is anchored and connected by two bolts 9.

[0066] Step 10: Secure the rail 6 to the sleeper 8 using fasteners 7;

[0067] Step 11: Insert the grouting pipe 13 with a one-way valve into the reserved hole in the track bed 3 from the side ditch 4, and then inject a specific fluid. After the fluid pressure rises to a certain value, the winged corner anchor block 12 and the upper rail system can be slowly lifted together until the winged corner anchor block 12 and the wedge block 11 are tightly fitted.

[0068] Step 12: During train operation on rail 6, monitor the fluid pressure inside bag 14 in real time, and replenish the injection fluid in a timely manner as necessary based on the monitoring values ​​to ensure the vertical stability and controllability of the rail system.

[0069] The following points should be noted during the implementation of the method:

[0070] 1. Based on the stability and load-bearing capacity requirements of the train operation on the rail 6 and the track system, adjust the wing angle dimensions of the wedge block 11 and the wing-angled anchor block 12 in a timely manner and ensure that the two fit tightly together.

[0071] 2. Based on the fluid pressure monitoring inside the bladder 14, fluid should be replenished and injected in a timely manner using the grouting pipe 13 with a one-way valve in the side ditch 4 of the track bed 3. This ensures that the pressure value inside the bladder 14 remains relatively stable, ultimately achieving the goal of effectively dissipating low-frequency micro-vibrations caused by train operation through the fluid inside the bladder 14, thereby reducing the propagation of train vibration and noise. The fluid pressure inside the bladder 14 is crucial for maintaining the stability of the upper winged anchor block 12 and the rail system. Real-time monitoring equipment should be used, and fluid should be replenished in a timely manner when necessary to ensure the stability of the vertical and horizontal displacement of the rail system. Generally, the pressure can be set at 0.5–0.725 MPa (based on a 16-ton axle load for a type A vehicle).

[0072] The structure of this invention has the following features and advantages:

[0073] 1) This invention is based on the concept of "vertical mechanical engagement and effective lateral limiting," effectively confining the winged corner anchor block within the pre-reserved groove of the track bed. After the winged corner anchor block is placed in the pre-reserved groove, its vertical displacement is limited by the wedge-shaped blocks installed on the track bed (a cork pad is provided at the contact point between the wing and the wedge-shaped block to prevent the corner from breaking), and its horizontal displacement is controlled by the construction precision between the dimensions of the wing, the anchor block, and the pre-reserved groove (generally within 1mm).

[0074] 2) The vibration frequency caused by train operation is directly proportional to the stiffness of the spring system and inversely proportional to the unsprung mass. This invention reserves a groove space at the track position above the ballast bed. The winged anchor block is supported by a fluid-injected bladder and steel spring at the bottom. This not only effectively reduces the stiffness K of the spring system (including the fluid-injected bladder and steel spring), but also increases the structural mass m below the spring system. In other words, the remaining ballast bed mass and the lining structure mass are treated together as objects disturbed by train vibration, effectively reducing the vibration response of the tunnel structure below caused by train vibration.

[0075] 3) By setting up a bladder at the bottom of the winged corner anchor block and injecting a specific fluid, the rail, sleeper, winged corner anchor block and ordinary track bed are "effectively isolated" by a certain pressure of fluid. This can effectively avoid physical "hard contact" between the conventional track, track bed and lining structure. Based on the idea of ​​"using softness to overcome hardness", the upper winged corner anchor block is effectively isolated. The vibration and noise transmitted from the train rail are effectively isolated by a certain pressure of fluid, thereby achieving the purpose of vibration reduction and noise reduction, and effectively improving the adverse impact of train operation on the surrounding environment.

[0076] 4) During the operation of rail transit, uneven settlement and deformation of the track are common due to changes in the surrounding environment. The conventional track bed and track (including sleepers) proposed in this invention are connected by winged corner anchor blocks. The vertical displacement of the anchor blocks is achieved by the combined action of the wedge-shaped blocks and the bag filled with a specific liquid below. Since the bag has a large elasticity, if the track settles, the anchor blocks can be appropriately "lifted" and finely adjusted by continuing to inject liquid into the bag (the adjustment range is within the compressible range of the cork pad at the contact surface between the wedge-shaped blocks and the corner anchors), thus appropriately reducing the adverse effects of track settlement and deformation on operation.

[0077] 5) The track bed proposed in this invention is divided into a grooved track bed and winged anchor blocks. The plane width of the winged anchor blocks is generally considered to be 200mm, and the width of the wing and wedge blocks is generally around 60-70mm, which can be adjusted according to the support needs of the track system. The maximum expansion height of the bag after fluid injection is generally considered to be around 100mm. The length of the single integral track bed along the longitudinal direction of the tunnel, the distribution spacing of the sleepers and anchor blocks can be determined comprehensively according to the on-site installation and transportation conditions. Cork pads are used for the contact between the wedge blocks and the winged anchor blocks, and the contact between the wing and the track bed to ensure close contact and avoid local breakage. The fluid injected into the bag at a certain pressure, together with the lower steel spring, bears the upper grooved anchor blocks, sleepers and rail system, and train running load, forming a special vertical vibration reduction system of "deformation coordination and vibration isolation". The process is simple and easy to construct, with high economic and social benefits, and has broad application prospects in track engineering involving rail transit and railway projects.

[0078] The above examples illustrate the present invention only to aid in understanding it and are not intended to limit the scope of the invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the principles of this invention.

Claims

1. A vibration-damping track bed based on fluid isolation, characterized in that: The upper middle part of the track bed (3) is provided with an anchor block groove (10), and a steel spring (16), a bag (14) and an anchor block (12) with wing corners are provided in the anchor block groove (10). The steel spring (16) is located at the bottom of the anchor block groove (10), the winged anchor block (12) is located above the steel spring (16), and the pouch (14) is sandwiched between the steel spring (16) and the winged anchor block (12). The winged corner anchor block (12) is fixed to the sleeper (8) above by bolts (9); The upper space of the anchor block groove (10) is larger than the lower space, and the outer periphery of the winged anchor block (12) is provided with a protruding wing, which is located in the upper space of the anchor block groove (10). A wedge-shaped block (11) is installed on the upper side of the groove (10) of the anchor block, and the bottom surface of the wedge-shaped block (11) is an inclined surface; The top surface of the wing corner of the wing-angled anchor block (12) is also an inclined surface. The wedge block (11) is located above the wing-angled anchor block (12), and the inclined surface of the wedge block (11) matches the inclined surface of the wing corner. The bag (14) is connected to a horizontal grouting pipe (13), which is laid in a pre-set pipe in the track bed (3). The grouting port of the grouting pipe (13) is located on the transverse side of the track bed (3). A steel plate (15) is provided on the top of the steel spring (16). The steel spring (16) and the pouch (14) are separated by the steel plate (15), which slides freely within the groove (10) of the anchor block.

2. The vibration-damping track bed based on fluid isolation according to claim 1, characterized in that: The top surface of the wedge block (11) is provided with a recessed hand hole (111), and an oblique reserved bolt hole (112) is provided between the hand hole (111) and the side surface of the wedge block (11). The side of the track bed (3) that connects with the wedge block (11) is provided with a pre-embedded sleeve (31). The wedge block (11) is installed on the upper space side of the anchor block groove (10) by inserting the pre-reserved bolt hole (112) through the bolt assembly (113) and the pre-embedded sleeve (31).

3. The vibration-damping track bed based on fluid isolation according to claim 2, characterized in that: A one-way valve is installed on the grouting pipe (13).

4. The vibration-damping track bed based on fluid isolation according to claim 3, characterized in that: The two pleural bags (14) are connected in series through the grouting pipe (13).

5. The vibration-damping track bed based on fluid isolation according to claim 4, characterized in that: The steel spring (16), the bag (14) and the winged corner anchor block (12) form a vibration damping assembly. Two sets of vibration damping assemblies are provided under each sleeper (8) and are symmetrical from left to right.

6. The construction method of the vibration-damping track bed based on fluid isolation according to claim 5, characterized in that: The method includes: Precast wedge block (11) and winged corner anchor block (12); Tunnel excavation construction forms tunnel lining (1); (2) Construct the track bed foundation at the bottom of the tunnel arch. Tie the reinforcing bars of the track bed (3) above the track bed foundation (2), pour the track bed (3) with the pre-reserved anchor block groove (10), reserve side ditches (4) on both sides, and reserve the corresponding channel of the grouting pipe (13) in advance at the corresponding position; A steel spring (16) and a steel plate (15) are placed in the groove (10) of the anchor block. Place a bladder (14) on the steel plate (15) and lay grouting pipes (13). Place the winged corner anchor block (12) above the bag (14), at which point the top of the winged corner anchor block (12) is flush with the top of the track bed (3); A wedge block (11) is installed on the upper side of the groove (10) of the anchor block. The sleeper (8) is fixed to the top of the winged corner anchor block (12) by bolts (9); The rail (6) is installed on top of the sleeper (8) using fasteners (7); By injecting fluid into the bag (14), the wing angle and the inclined surface of the wedge block (11) are brought into direct contact, and the wing angle anchor block (12) reaches its maximum vertical height; the relative displacement between the wing angle and the wedge block (11) is the height at which the wing angle anchor block (12) and the rail system rise.

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