A full-section prefabricated plate vibration reduction track structure and construction method

Abstract

The present invention relates to the field of rail transit technology, and discloses a full-section prefabricated plate vibration-damping track structure and a construction method, wherein the structure includes a grouting layer, a vibration-damping cushion layer and a prefabricated track plate from bottom to top; the vibration-damping cushion layer is arranged under the prefabricated track plate, and the vibration-damping cushion layer and the prefabricated track plate are composited into one; the grouting layer is made of a self-compacting concrete material with good fluidity, and the grouting layer is used to fill the gap between the vibration-damping cushion layer and the arc-shaped shield segment; two prefabricated plate reserved guide grooves that are engaged with wedge-shaped support blocks are arranged on both sides of the prefabricated track plate; before the grouting layer is formed, the wedge-shaped support block is used to support the vibration-damping cushion layer and the prefabricated track plate; after the grouting layer is formed, the wedge-shaped support block cancels the support for the vibration-damping cushion layer and the prefabricated track plate, and realizes the contact between the vibration-damping cushion layer and the grouting layer. The full-section prefabricated plate vibration-damping track structure of the present invention has a good vibration-damping effect.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit, and in particular to a full-section prefabricated plate vibration-damping track structure and a construction method. Background Art

[0002] With the development of urban rail transit and the continuous improvement of people's living standards, the vibration and noise problems of urban rail transit have attracted more and more attention. At present, the main measure for reducing vibration and noise in urban rail transit is track structure vibration reduction. Among the track vibration reduction measures, the track structure of the ballast bed has a larger vibration mass and better vibration reduction effect. The vibration reduction pad ballast bed is a type of ballast bed type vibration reduction track.

[0003] The current vibration damping pad track mainly includes cast-in-place reinforced concrete ballast, three-layer prefabricated ballast and two-layer prefabricated ballast. The cast-in-place vibration damping pad reinforced concrete ballast has a large amount of on-site steel bar binding and concrete pouring, and the vibration damping pad laying must be completed on-site, so the construction speed is slow, the work efficiency is low, and the construction cost is high. In the prior art, when preparing the vibration damping pad reinforced concrete ballast, a temporary support device is built, and the support device is removed after the vibration damping pad reinforced concrete ballast is formed, which leads to an already complicated construction process and further reduces the efficiency.

[0004] As the main measure for reducing vibration and noise in urban rail transit, the vibration reduction effect of vibration-damping pad roadbed still needs to be further improved to meet people's higher requirements for quality of life. Therefore, laying vibration-damping pad reinforced concrete roadbed is an indispensable construction process.

[0005] Therefore, in view of the fact that there are still many defects and shortcomings in the construction efficiency, construction quality and vibration reduction effect of the vibration-damping pad track bed in the prior art, the present invention proposes a full-section prefabricated plate vibration-damping track structure and construction method. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a full-section prefabricated plate vibration-damping track structure and a construction method. The vibration-damping prefabricated track structure and the construction method of the present invention can achieve better vibration-damping effects on the basis of improving construction efficiency.

[0007] The present invention provides a full-section prefabricated plate vibration-damping track structure, which comprises, from bottom to top, an arc-shaped shield segment, a grouting layer, a vibration-damping cushion layer and a prefabricated track plate; the vibration-damping cushion layer is arranged under the prefabricated track plate, and the vibration-damping cushion layer and the prefabricated track plate are composited into one; the grouting layer is made of a dense concrete material with good fluidity, and the grouting layer is used to fill the gap between the vibration-damping cushion layer and the arc-shaped shield segment; a wedge-shaped support block is arranged in the grouting layer;

[0008] Both sides of the prefabricated track plate are provided with two prefabricated plate reserved guide grooves which are engaged with the wedge-shaped support blocks; before the filling layer is formed, the wedge-shaped support blocks are used to support the vibration-damping pad layer and the prefabricated track plate; after the filling layer is formed, the wedge-shaped support blocks cancel the support for the vibration-damping pad layer and the prefabricated track plate, thereby achieving contact between the vibration-damping pad layer and the filling layer.

[0009] Furthermore, before forming the filling layer, the wedge-shaped support blocks are used to support the vibration-damping pad layer and the prefabricated track slab, specifically including:

[0010] Four supporting bolt holes penetrating the prefabricated track plate are arranged in the reserved guide groove of each prefabricated plate, and holes coinciding with the supporting bolt holes are also arranged in the vibration-damping pad layer. Support bolts are screwed into the prefabricated track plate through the supporting bolt holes, so that one end of the supporting bolt is screwed into the vibration-damping pad layer, and the screwed-in end of the supporting bolt is flush with the surface of the vibration-damping pad layer close to the wedge-shaped support block, so that the wedge-shaped support block is used to support the vibration-damping pad layer and the prefabricated track plate.

[0011] In the present invention, the screw-in end of the support bolt is the end of the support bolt that first enters the support bolt hole when the support bolt is screwed into the support bolt hole.

[0012] Furthermore, after the filling layer is formed, the wedge-shaped support block cancels the support for the vibration-damping pad layer and the prefabricated track plate, and the contact between the vibration-damping pad layer and the filling layer is achieved specifically including:

[0013] By screwing the support bolts out of the support bolt holes of the prefabricated track slab, the vibration-damping pad layer and the filling layer are in contact, so that the wedge-shaped support blocks cancel the support for the vibration-damping pad layer and the prefabricated track slab.

[0014] Furthermore, a double-helix nylon sleeve is provided in the prefabricated track plate. The double-helix nylon sleeve is provided in the supporting bolt hole. A thread matching the shape of the supporting bolt is provided in the double-helix nylon sleeve.

[0015] Furthermore, the supporting bolt hole is perpendicular to the surface of the reserved guide groove of the prefabricated plate.

[0016] Furthermore, the theoretical angle formed by the contact surface of the support bolt and the wedge-shaped support block in contact with the support bolt is 90°. In actual implementation, the actual angle formed by the contact surface of the support bolt and the wedge-shaped support block in contact with the support bolt differs from the theoretical angle by no more than 3°.

[0017] Furthermore, the wedge-shaped support block is a wedge-shaped block, and the thickness of the wedge-shaped support block decreases along the insertion direction of the wedge-shaped support block.

[0018] Furthermore, two prefabricated plate reserved guide grooves which engage with the wedge-shaped support blocks are provided on both sides of the prefabricated track plate, specifically including: two prefabricated plate reserved guide grooves on the same side of the prefabricated track plate, which are arranged opposite to each other on the prefabricated track plate.

[0019] Further, the width of the surface of the wedge-shaped support block in contact with the reserved guide groove of the prefabricated panel is 1 / 2 of the width of the surface of the prefabricated panel in contact with the wedge-shaped support block.

[0020] Furthermore, the vibration-damping pad layer is composed of a vibration-damping pad area at the bottom of the plate, a vibration-damping pad area in the groove, a vibration-damping pad area on the side of the plate, and a vibration-damping pad area in the injection hole;

[0021] The vibration-damping pad area at the bottom of the plate is used to reduce vibration at the lower end of the prefabricated track plate;

[0022] The grooved vibration-damping pad area is used to reduce vibration in the reserved guide groove of the prefabricated plate;

[0023] The plate side vibration damping pad area and the vibration damping pad area in the injection hole are used for vibration damping pad layer displacement buffering.

[0024] Furthermore, a conical protrusion is arranged in the vibration-damping pad area at the bottom of the plate; and a strip-shaped protrusion is arranged in the vibration-damping pad area at the groove.

[0025] Furthermore, the prefabricated track plate is also provided with a pouring hole, and a pouring hole is provided in the pouring hole in the vibration damping pad area in the pouring hole in the vibration damping pad layer, and the pouring hole and the pouring hole completely overlap and are used for pouring the filling material layer.

[0026] Furthermore, the vibration damping pad layer and the prefabricated track slab are composited into one specifically as follows: the plate side vibration damping pad region is provided with a plate side vibration damping pad end edge, and the plate side vibration damping pad end edge is engaged with the vibration damping pad slot at the lower end of the prefabricated track slab, thereby realizing that the vibration damping pad layer and the prefabricated track slab are composited into one.

[0027] Furthermore, the prefabricated track plate is also provided with a reserved bolt hole, wherein the reserved bolt hole is adjacent to the vibration-damping pad slot, and the vibration-damping pad layer and the prefabricated track plate can be bolted to each other by screwing the bolt into the reserved bolt hole.

[0028] Furthermore, the hole that coincides with the supporting bolt hole is arranged in the groove vibration damping pad area.

[0029] Furthermore, secondary cast ballast beds are provided at both ends of the filling layer, and a V-shaped water-proof pad is also provided in the structure, one end of the V-shaped water-proof pad is adhered to the bolt fixing position, and the other end of the V-shaped water-proof pad is buried in the secondary cast ballast bed.

[0030] Furthermore, the prefabricated track plate is provided with two parallel steel rails, and each steel rail is fixed to the prefabricated track plate by a plurality of fasteners.

[0031] Furthermore, the surface of the secondary cast ballast bed is provided with ballast bed drainage ditches.

[0032] Furthermore, the prefabricated track slab also includes a rail support platform, and the rail support platform is used to place the rails.

[0033] Furthermore, the vibration-damping prefabricated track structure is arranged on the arc-shaped shield segment.

[0034] The present invention also provides a construction method of the full-section prefabricated plate vibration-damping track structure, the construction method comprising:

[0035] Step S1: transport the prefabricated track slab to a designated location, and roughly lay the prefabricated track slab on the laid arc shield segment;

[0036] Step S2: screwing the support bolt into the prefabricated track plate through the support bolt hole, so that one end of the support bolt is screwed into the vibration-damping pad layer, and the screwed-in end of the support bolt is flush with the surface of the vibration-damping pad layer close to the wedge-shaped support block; fine-tuning the laying position of the prefabricated track plate by a fine-tuning vehicle, and installing the wedge-shaped support block in the reserved guide groove of the prefabricated plate under the prefabricated track plate;

[0037] Step S3: grouting material is poured through the prefabricated track slab grouting holes to form a grouting layer, and the grouting layer is cured until the grouting layer reaches the design strength;

[0038] Step S4: screwing the support bolts out of the prefabricated track slab from the support bolt holes, so that the vibration-damping pad layer and the filling layer are in contact, and the wedge-shaped support blocks cancel the support for the vibration-damping pad layer and the prefabricated track slab;

[0039] Step S5: pouring secondary ballast bed at both ends of the filling layer, and laying and installing rails and fasteners on the prefabricated track slabs.

[0040] Furthermore, the prefabricated track slab in step S1 has a composite integrated vibration-damping pad layer.

[0041] Furthermore, the process of integrating the prefabricated track plate and the vibration-damping pad layer is specifically as follows: the vibration-damping pad slots on the prefabricated track plate are engaged with the plate-side vibration-damping pad end edges on the vibration-damping pad layer, and bolts are screwed into the reserved bolt holes on the prefabricated track plate to fix them.

[0042] Furthermore, the supporting bolt hole is perpendicular to the surface of the reserved guide groove of the prefabricated plate.

[0043] Furthermore, the theoretical angle formed by the support bolts and the support bolts on the contact surface of the wedge-shaped support block is 90°. In actual implementation, the difference between the actual angle formed by the support bolts and the support bolts on the contact surface of the wedge-shaped support block and the theoretical angle is no more than 3°.

[0044] Furthermore, two prefabricated plate reserved guide grooves which are engaged with the wedge-shaped support blocks are provided on both sides of the prefabricated track plate.

[0045] Furthermore, four supporting bolt holes penetrating the prefabricated track plate are arranged in the reserved guide groove of each prefabricated plate.

[0046] The embodiments of the present invention have the following technical effects:

[0047] 1. The present invention first designs a full-section prefabricated plate vibration reduction track structure. The structure of the present invention can not only achieve vibration reduction, but also avoid the removal of the wedge-shaped support block from the track structure, thereby improving construction efficiency;

[0048] In order to improve the efficiency of construction, a wedge-shaped support block is first designed. The shape of the wedge-shaped support block can improve the adaptability of the wedge-shaped support block to the bottom of the prefabricated track plate, and by adjusting the support bolts in the four wedge-shaped support blocks to adapt to different installation heights in the guide groove of the prefabricated track plate, the stability of the support of the prefabricated track plate is achieved through the wedge-shaped support block and the support bolts. Secondly, the support process for the prefabricated track plate is simple and easy to achieve. By screwing the support bolts into the vibration-damping pad layer through the support bolt holes, and the screwed-in end of the support bolts is flush with the surface of the vibration-damping pad layer close to the wedge-shaped support block, the wedge-shaped support block and the support bolts achieve a supporting function on the basis of ensuring that the vibration-damping pad layer is not deformed. By screwing the support bolts out of the support bolt holes, the supporting function of the wedge-shaped support block is cancelled, and the vibration-damping pad layer is in close contact with the filling layer. Finally, the present invention further designs the support bolt hole to be perpendicular to the surface of the reserved guide groove of the prefabricated plate during support, the theoretical angle formed by the support bolt and the contact surface of the wedge-shaped support block is 90°, and each prefabricated plate reserved guide groove is provided with 4 support bolt holes that penetrate the prefabricated track plate, thereby further improving the stability during the support process; after the support bolt is screwed out, a strip protrusion is provided in the groove vibration damping pad area on the basis of retaining the wedge-shaped support block, thereby ensuring the vibration reduction effect of the overall structure.

[0049] 2. In this technical solution, support bolts and wedge-shaped support blocks are used to temporarily support and unload the prefabricated track slabs during construction, reducing the installation and disassembly of construction machinery such as erecting and supporting prefabricated track slabs and prefabricated track slab anti-floating frames, improving construction efficiency and reducing construction costs.

[0050] 3. In this technical solution, the vibration-damping pad prefabricated track slab has a large parametric mass, a low natural frequency, and a good vibration-damping effect. The prefabricated track slab is temporarily supported during construction by an unloadable wedge-shaped support block, which reduces the installation and disassembly of construction machinery such as the erection and support of the prefabricated track slab and the anti-floating frame of the prefabricated track slab, improves construction efficiency, and reduces construction costs. The vibration-damping pad sets its parameters and performance according to the region and function to meet the vibration-damping performance and structural stress of different parts of the track bed. At the same time, the vibration-damping pad is highly applicable to prefabricated slabs of different specifications, which reduces the specifications of the vibration-damping pad and reduces investment. With fewer construction processes and a simple construction process, the construction efficiency can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0052] Figure 1 It is a structural diagram of a full-section prefabricated plate vibration-damping track structure provided in an embodiment of the present invention.

[0053] Figure 2 It is a schematic diagram of the structure of a prefabricated track slab provided in an embodiment of the present invention.

[0054] Figure 3 It is a schematic diagram of a vibration-damping cushion provided in an embodiment of the present invention.

[0055] Reference numerals:

[0056] 1-precast track slab; 2-vibration damping pad layer; 3-wedge-shaped support block; 4-pouring layer; 5-secondary pouring ballast bed; 6-support bolt; 7-rail; 8-arc shield segment; 101-precast slab reserved guide groove; 102-support bolt hole; 103-pouring hole; 104-vibration damping pad slot; 105-reserved bolt hole; 106-rail support platform; 201-plate bottom vibration damping pad area; 202-groove vibration damping pad area; 203-plate side vibration damping pad area; 204-vibration damping pad area in the pouring hole; V-shaped anti-seepage thin pad-205; 501-ballast bed drainage ditch; 203-1-plate side vibration damping pad end edge, 202-1-hole. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0058] Combine the following Figures 1 to 3 As shown, some embodiments are further described to provide a full-section prefabricated plate vibration-damping track structure.

[0059] exist Figure 1 In the document, a vibration-damping prefabricated track structure is disclosed, which includes, from bottom to top, an arc-shaped shield segment 8, a grouting layer 4, a vibration-damping cushion layer 2 and a prefabricated track plate 1; the vibration-damping cushion layer 2 is arranged under the prefabricated track plate 1, and the vibration-damping cushion layer 2 and the prefabricated track plate 1 are composited into one; the grouting layer 4 is made of a dense concrete material with good fluidity, and the grouting layer 4 is used to fill the gap between the vibration-damping cushion layer 2 and the arc-shaped shield segment 8; a wedge-shaped support block 3 is arranged in the grouting layer 4, and two prefabricated plate reserved guide grooves 101 that are engaged with the wedge-shaped support block 3 are arranged on both sides of the prefabricated track plate 1; before the grouting layer 4 is formed, the wedge-shaped support block 3 is used to support the vibration-damping cushion layer 2 and the prefabricated track plate 1; after the grouting layer 4 is formed, the wedge-shaped support block 3 cancels the support for the vibration-damping cushion layer 2 and the prefabricated track plate 1, so as to achieve contact between the vibration-damping cushion layer 2 and the grouting layer 4.

[0060] In the structure of the present invention, before the pouring layer is formed, the supporting effect of the wedge-shaped support block is conducive to pouring the pouring layer. After the pouring layer is formed, there is no need to remove the wedge-shaped support block from the reserved guide groove of the prefabricated plate, so that the vibration-damping cushion layer and the pouring layer can be closely and fully contacted, and the vibration-damping effect of the vibration-damping prefabricated track structure can be achieved. In the present invention, the pouring layer plays a supporting and limiting role for the prefabricated track plate.

[0061] The wedge-shaped support block 3 is a wedge-shaped block, and the thickness of the wedge-shaped support block 3 decreases along the insertion direction of the wedge-shaped support block 3.

[0062] In the present invention, the shape of the wedge-shaped support block is set to facilitate the adaptation of the wedge-shaped support block to the bottom of the prefabricated track slab.

[0063] Each prefabricated plate reserved guide groove 101 is provided with 4 support bolt holes 102 penetrating the prefabricated track plate 1, and the vibration-damping pad layer 2 is also provided with holes 202-1 that overlap with the support bolt holes 102. Before forming the grouting layer 4, the support bolt 6 is screwed into the prefabricated track plate 1 through the support bolt hole 102, so that one end of the support bolt 6 is screwed into the vibration-damping pad layer 2, and the screwed-in end of the support bolt 6 is flush with the surface of the vibration-damping pad layer 2 close to the wedge-shaped support block 3, so that the wedge-shaped support block 3 is used to support the vibration-damping pad layer 2 and the prefabricated track plate 1. After forming the grouting layer 4, the support bolt 6 is screwed out of the prefabricated track plate 1 from the support bolt hole 102, so that the vibration-damping pad layer 2 and the grouting layer 4 are in contact, so that the wedge-shaped support block 3 cancels the support for the vibration-damping pad layer 2 and the prefabricated track plate 1.

[0064] In the present invention, firstly, the whole supporting process is very simple and easy to implement. By screwing the supporting bolt into the vibration-damping cushion layer through the supporting bolt hole, and the screwed-in end of the supporting bolt is flush with the surface of the vibration-damping cushion layer close to the wedge-shaped supporting block, the wedge-shaped supporting block and the supporting bolt achieve a supporting function on the basis of ensuring that the vibration-damping cushion layer does not deform. By screwing the supporting bolt out of the supporting bolt hole, the supporting function of the wedge-shaped supporting block is cancelled, and the vibration-damping cushion layer is in close contact with the filling layer.

[0065] Two prefabricated plate reserved guide grooves 101 are provided on both sides of the prefabricated track plate 1, which are engaged with the wedge-shaped support block 3. The two prefabricated plate reserved guide grooves 101 on the same side of the prefabricated track plate 1 are arranged opposite to each other on the prefabricated track plate 1, and four wedge-shaped support blocks 3 are provided. In addition, four support bolt holes 102 penetrating the prefabricated track plate 1 are provided in each prefabricated plate reserved guide groove 101, and a double-helix nylon sleeve is provided in the support bolt hole 102. The double-helix nylon sleeve is provided in the support bolt hole 102, and a thread matching the shape of the support bolt 6 is provided in the double-helix nylon sleeve. The support bolt 6 can support and unload the prefabricated track plate through the support bolt hole 102 and the wedge-shaped support block 3.

[0066] In the present invention, by adjusting the screwing depth of the four wedge-shaped support blocks and the support bolts 6 to adapt to different installation heights in the guide groove of the prefabricated track plate, the wedge-shaped support blocks and the support bolts can realize the supporting effect on the surface of the prefabricated track plate and ensure the stability of the support of the prefabricated track plate. As an example, during the support process, a support bolt can be screwed into each prefabricated track plate guide groove first. When the working surface of the wedge-shaped support block cannot meet the height adjustment requirement, the second support bolt can be screwed in and adjusted until the adjustment requirement is met. The double-helix nylon sleeve can be embedded in the prefabricated track plate when the prefabricated track plate is prepared. In order to improve the stability of the connection between the double-helix nylon sleeve and the prefabricated track plate, the surface where the double-helix nylon sleeve contacts the prefabricated track plate can be set to a spiral shape.

[0067] The support bolt hole 102 is perpendicular to the surface of the reserved guide groove 101 of the prefabricated plate; the theoretical angle formed by the support bolt 6 and the contact surface of the wedge-shaped support block 3 contacted by the support bolt 6 is 90°. In actual implementation, the difference between the actual angle formed by the support bolt 6 and the contact surface of the wedge-shaped support block 3 contacted by the support bolt 6 and the theoretical angle is no more than 3°. Theoretically, when the theoretical angle formed by the support bolt on the contact surface of the wedge-shaped support block is 90°, it has better support stability. In actual operation, the error is allowed to be less than 3° in actual implementation. After the support bolt is screwed out, a strip protrusion is provided in the groove vibration damping pad area 202 on the basis of retaining the wedge-shaped support block, thereby ensuring the vibration reduction effect of the overall structure.

[0068] The width of the surface of the wedge-shaped support block 3 in contact with the reserved guide groove 101 of the precast plate is 1 / 2 of the width of the surface of the reserved guide groove 101 of the precast plate in contact with the wedge-shaped support block 3. In the present invention, the wedge-shaped support block can be prevented from acting on the pipe seam position of the arc-shaped shield segment, thereby avoiding adverse effects on the shield segment.

[0069] exist Figure 3 In the disclosure, the vibration damping pad layer 2 is composed of a plate bottom vibration damping pad area 201, a groove vibration damping pad area 202, a plate side vibration damping pad area 203, and a pouring hole vibration damping pad area 204; the plate bottom vibration damping pad area 201 is used to dampen the vibration of the lower end of the prefabricated track plate 1; the groove vibration damping pad area 202 is used to dampen the vibration in the reserved guide groove 101 of the prefabricated plate; the plate side vibration damping pad area 203 and the pouring hole vibration damping pad area 204 are used for displacement buffering of the vibration damping pad layer 2. Conical protrusions are provided in the plate bottom vibration damping pad area 201; and strip protrusions are provided in the groove vibration damping pad area 202.

[0070] In the present invention, the stiffness of different areas of the vibration damping pad layer is determined according to the force calculation of each part. The vibration damping pad area at the bottom of the plate and the vibration damping pad area in the groove mainly play a vibration damping role; the vibration damping pad area on the side of the plate and the vibration damping pad area in the pouring hole should meet the displacement requirements of the plate in all directions, in order to adapt to prefabricated plates of different specifications and sizes. In order to meet the vibration damping effect of the vibration damping pad area at the bottom of the plate, a conical protrusion is also provided in the vibration damping pad area at the bottom of the plate.

[0071] exist Figure 1 and Figure 3It is disclosed that the plate side vibration damping pad area 203 is provided with a plate side vibration damping pad end edge 203-1, and the plate side vibration damping pad end edge 203-1 is engaged with the vibration damping pad slot 104 at the lower end of the prefabricated track plate 1, so that the vibration damping pad layer 2 and the prefabricated track plate 1 are combined into one; the prefabricated track plate 1 is also provided with a reserved bolt hole 105, and the reserved bolt hole 105 is adjacent to the vibration damping pad slot 104. By screwing the bolt into the reserved bolt hole 105, the vibration damping pad layer 2 and the prefabricated track plate 1 can be bolted. A V-shaped waterproof thin pad 205 is also provided at the bolt fixing place. Through the above cooperation, the vibration damping pad layer 2 and the prefabricated track plate 1 are combined into one.

[0072] In the present invention, in order to ensure the close contact and sealing between the vibration-damping pad and the prefabricated track plate, it is prevented that the grouting material during construction enters between the prefabricated track plate and the vibration-damping pad, and that the accumulated water during operation enters between the vibration-damping pad and the prefabricated track plate or the grouting material, which affects the vibration-damping effect and durability of the vibration-damping prefabricated track structure. First, after the end edge of the vibration-damping pad on the plate side is engaged with the vibration-damping pad slot at the lower end of the prefabricated track plate, a sealing strip is used to seal the end of the vibration-damping pad; second, after the vibration-damping pad and the prefabricated track plate are bolted, a sealing strip is used to seal the joint; third, a pouring hole is provided in the vibration-damping pad area in the pouring hole as an integral cylindrical structure, which has no joints with other areas of the vibration-damping pad; fourth, a V-shaped water-proof thin pad is pasted on the side of the vibration-damping pad along the line direction, one side of the V-shaped water-proof thin pad is pasted to the vibration-damping pad, and the other side is poured into the secondary pouring track bed. In the present invention, by sealing between the vibration-damping cushion layer and the prefabricated track slab and draining the track structure, the erosion of the track structure by grouting materials and water during construction and operation is reduced, the occurrence of diseases is reduced, and the vibration-damping effect of the track structure is ensured.

[0073] exist Figure 2 and Figure 3 In the disclosure, it is disclosed that the prefabricated track plate 1 is also provided with a pouring hole 103, and a pouring hole is provided in the pouring hole in the vibration damping pad area 204 of the vibration damping pad layer 2, and the pouring hole 103 completely overlaps with the pouring hole, which is used to pour the filling layer 4. The hole 202-1 that coincides with the support bolt hole 102 is provided in the groove vibration damping pad area 202. The smooth process of forming the filling layer is ensured.

[0074] exist Figure 1 In the document, it is disclosed that two parallel rails 7 are arranged on the prefabricated track plate 1, and each rail 7 is fixed to the prefabricated track plate 1 by a plurality of fasteners; the surface of the secondary cast ballast bed 5 is provided with a ballast bed drainage ditch 501; the prefabricated track plate 1 also includes a rail support platform 106, which is used to place the rails 7; and the vibration-damping prefabricated track structure is arranged on the arc-shaped shield segment 8. The ballast bed drainage ditch 501 is used to drain the accumulated water on the prefabricated track plate, so as to prevent the wastewater on the surface of the prefabricated track plate from leaking into the gap between the prefabricated track plate, the vibration-damping cushion layer and the filling layer, which affects the durability of the entire vibration-damping structure.

[0075] In a second aspect, the present invention further provides a construction method for the full-section prefabricated plate vibration-damping track structure, the construction method comprising:

[0076] Step S1: transport the prefabricated track slab to a designated location, and roughly lay the prefabricated track slab on the laid arc shield segment;

[0077] The hoisting of the prefabricated track slab is completed through the prefabricated track slab support bolt holes and the prefabricated track slab hoist. The track slab hoist installation is completed by inserting the hoist steel rod into the support bolt hole and then pulling the hoist lock. After the hoisting is completed, the hoist lock is opened and the steel rod is pulled out. Compared with the existing anchor bolts, the hoisting and transportation efficiency of the prefabricated track slab is improved, and the construction efficiency is improved. Before the transportation of the prefabricated track slab, the construction unit first measures the center of the prefabricated track slab and roughly locates the contour of the prefabricated track slab. The transportation of the prefabricated track slab is generally carried out by tire-type pallet trucks, which can improve the efficiency of transporting the slab. When the prefabricated track slab is transported to the designated location, the prefabricated track slab is hoisted to the designated location according to the measurement and the positioning line of the prefabricated track slab contour to complete the rough laying of the prefabricated track slab. The support bolts are anchored before the rough laying of the prefabricated track slab.

[0078] Step S2: screwing the support bolt into the prefabricated track plate through the support bolt hole, so that one end of the support bolt is screwed into the vibration-damping pad layer, and the screwed-in end of the support bolt is flush with the surface of the vibration-damping pad layer close to the wedge-shaped support block; fine-tuning the laying position of the prefabricated track plate by a fine-tuning vehicle, and installing the wedge-shaped support block in the reserved guide groove of the prefabricated plate under the prefabricated track plate;

[0079] The fine-tuning of precast track slabs is usually completed by a fine-tuning vehicle to improve the fine-tuning efficiency, and can also be completed by a fine-tuning frame. The fine-tuning of precast track slabs needs to consider the impact of the vertical compression of the vibration-damping cushion on the elevation of the track slab. When installing the wedge-shaped support block, no mechanical device is required. After the fine-tuning of the precast track slab is completed, the worker manually places the wedge-shaped support block into the reserved guide groove of the precast slab to complete the installation of the wedge-shaped support block. No additional tooling and machinery are required, and the wedge-shaped support block will not be displaced after the precast track slab is lifted.

[0080] Step S3: grouting material is poured through the prefabricated track slab grouting holes to form a grouting layer, and the grouting layer is cured until the grouting layer reaches the design strength;

[0081] Before pouring the filling layer, a steel mold is required to complete the sealing around the prefabricated track slab to avoid leakage of the filling material. When pouring the filling layer, pour from the pouring holes on the upper part of the prefabricated track slab.

[0082] Step S4: screwing the support bolts out of the prefabricated track slab from the support bolt holes, so that the vibration-damping pad layer and the filling layer are in contact, and the wedge-shaped support blocks cancel the support for the vibration-damping pad layer and the prefabricated track slab;

[0083] When the filling layer reaches the required strength, the wedge-shaped support block is unloaded. When the wedge-shaped support block is unloaded, the support bolts are unscrewed by an electric wrench and the support bolt holes on the top surface of the prefabricated track plate are sealed.

[0084] Step S5: pouring a secondary ballast bed at both ends of the pouring layer, and laying and installing rails and fasteners on the prefabricated track slabs;

[0085] The ballast bed drainage ditch is a semicircular ditch, which is cast for the second time after the pouring layer is poured and reaches the strength. After the pouring layer is poured and the prefabricated track slab is laid for a certain length, generally at least one section length, the ballast bed drainage ditch on both sides is poured uniformly, and the rails and fasteners are laid and installed. When pouring the secondary ballast bed, one side of the V-shaped waterproof thin pad is poured into the ballast bed.

[0086] In some embodiments, the prefabricated track slab in step S1 has a composite integrated vibration-damping pad layer.

[0087] In some embodiments, the process of integrating the prefabricated track plate and the vibration-damping pad layer is specifically as follows: the vibration-damping pad slots on the prefabricated track plate are engaged with the plate-side vibration-damping pad end edges on the vibration-damping pad layer, and bolts are screwed into the reserved bolt holes on the prefabricated track plate for bolt fixing.

[0088] The upper part of the precast track slab contains rails and rail support platforms for mounting fasteners. As an example, the spacing of the rail support platforms along the line direction is 0.6m. Two grouting holes that penetrate the thickness direction of the precast track slab can be set on the center line of the precast track slab to be used for pouring the grouting layer during construction and to limit the longitudinal and lateral displacement of the precast track slab during operation. There are precast slab reserved guide grooves on the side of the precast track slab for the installation of unloadable wedge-shaped support blocks. Reserved bolt holes for hoisting, fixing molds or vibration damping pads are reserved at the bottom and sides of the precast track slab.

[0089] As an example, the thickness of the prefabricated track slab is determined according to the structural form and the reserved track height. It is increased as much as possible while meeting the force of the filling layer and the structural construction error, so as to improve the vibration quality and vibration reduction effect of the track structure and improve the assembly rate. The thickness of the filling layer is generally 10cm when meeting the force and 90% structural construction error. The length of the prefabricated track slab along the line direction is generally 4.7m and 3.5m.

[0090] As an example, the material of the vibration damping pad is generally rubber or polyurethane, and the stiffness of the vibration damping pad matches the mass of the prefabricated track slab; the stiffness of the groove vibration damping pad area of ​​the vibration damping pad should not be greater than the stiffness of the vibration damping pad area at the bottom of the slab, and the stiffness of the vibration damping pad area on the side of the slab and the vibration damping pad area in the pouring hole should be greater than the stiffness of the vibration damping pad area at the bottom of the slab, and should be determined according to the stress conditions of different parts.

[0091] In some embodiments, the supporting bolt hole is perpendicular to the surface of the reserved guide groove of the prefabricated plate.

[0092] In some embodiments, the theoretical angle formed by the support bolts and the support bolts on the contact surface of the wedge-shaped support block is 90°. In actual implementation, the difference between the actual angle formed by the support bolts and the support bolts on the contact surface of the wedge-shaped support block and the theoretical angle is no more than 3°.

[0093] In some embodiments, two prefabricated plate reserved guide grooves that engage with the wedge-shaped support blocks are provided on both sides of the prefabricated track plate.

[0094] In some embodiments, four supporting bolt holes penetrating the prefabricated track plate are arranged in the reserved guide groove of each prefabricated plate.

[0095] It should be noted that the terms used in the present invention are only for describing specific embodiments, rather than limiting the scope of the present application. As shown in the present specification, unless the context clearly indicates an exception, the words "one", "a", "a kind of" and / or "the" do not specifically refer to the singular, but may also include the plural. The terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method or equipment. In the absence of further restrictions, the elements defined by the sentence "include one..." do not exclude the presence of other identical elements in the process, method or equipment including the elements.

[0096] It should also be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. 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 it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention.

Claims

1. A construction method for a full-section prefabricated plate vibration-damping track structure, characterized in that: The track structure comprises, from bottom to top, an arc-shaped shield segment (8), a grouting layer (4), a vibration-damping pad (2) and a prefabricated track slab (1); the vibration-damping pad (2) is arranged under the prefabricated track slab (1), and the vibration-damping pad (2) and the prefabricated track slab (1) are composited into one body; the grouting layer (4) is used to fill the gap between the vibration-damping pad (2) and the arc-shaped shield segment (8); a wedge-shaped support block (3) is arranged in the grouting layer (4); Two prefabricated plate reserved guide grooves (101) that engage with the wedge-shaped support blocks (3) are provided on both sides of the prefabricated track plate (1); before the filling layer (4) is formed, the wedge-shaped support blocks (3) are used to support the vibration-damping cushion layer (2) and the prefabricated track plate (1); after the filling layer (4) is formed, the wedge-shaped support blocks (3) cancel the support for the vibration-damping cushion layer (2) and the prefabricated track plate (1), thereby achieving contact between the vibration-damping cushion layer (2) and the filling layer (4); Before forming the filling layer (4), the wedge-shaped support block (3) is used to support the vibration-damping cushion layer (2) and the prefabricated track slab (1) and specifically comprises: Each prefabricated plate reserved guide groove (101) is provided with four support bolt holes (102) penetrating the prefabricated track plate (1), and the vibration-damping pad layer (2) is also provided with holes (202-1) overlapping with the support bolt holes (102), and the support bolts (6) are screwed into the prefabricated track plate (1) through the support bolt holes (102), so that one end of the support bolt (6) is screwed into the vibration-damping pad layer (2), and the screwed-in end of the support bolt (6) is flush with the surface of the vibration-damping pad layer (2) close to the wedge-shaped support block (3), so that the wedge-shaped support block (3) is used to support the vibration-damping pad layer (2) and the prefabricated track plate (1); After the filling layer (4) is formed, the wedge-shaped support block (3) cancels the support for the vibration-damping cushion layer (2) and the prefabricated track plate (1), and the contact between the vibration-damping cushion layer (2) and the filling layer (4) is achieved specifically including: By screwing the support bolt (6) out of the support bolt hole (102) of the prefabricated track plate (1), the vibration-damping pad layer (2) and the filling layer (4) are in contact, so that the wedge-shaped support block (3) cancels the support for the vibration-damping pad layer (2) and the prefabricated track plate (1); The width of the surface of the wedge-shaped support block (3) in contact with the reserved guide groove (101) of the prefabricated plate is 1 / 2 of the width of the surface of the wedge-shaped support block (3) in contact with the reserved guide groove (101) of the prefabricated plate; The supporting bolt hole (102) is perpendicular to the surface of the reserved guide groove (101) of the prefabricated plate; The theoretical angle formed by the contact surface of the support bolt (6) and the wedge-shaped support block (3) in contact with the support bolt (6) is 90°. In actual implementation, the difference between the actual angle formed by the contact surface of the support bolt (6) and the wedge-shaped support block (3) in contact with the support bolt (6) and the theoretical angle is not greater than 3°. The prefabricated track plate (1) is further provided with a double-helix nylon sleeve, which is arranged in the support bolt hole (102), and a thread matching the shape of the support bolt (6) is arranged in the double-helix nylon sleeve; The vibration-damping pad layer is composed of a plate bottom vibration-damping pad area (201), a groove vibration-damping pad area (202), a plate side vibration-damping pad area (203), and a vibration-damping pad area (204) in a pouring hole; The plate bottom vibration damping pad area (201) is used to dampen vibration at the lower end of the prefabricated track plate (1); The groove vibration-damping pad area (202) is used to reduce vibration in the reserved guide groove (101) of the prefabricated plate; The plate side vibration damping pad area (203) and the in-filling hole vibration damping pad area (204) are used for displacement buffering of the vibration damping pad layer (2); A conical protrusion is provided in the plate bottom vibration damping pad area (201); and a strip-shaped protrusion is provided in the groove vibration damping pad area (202); The construction method includes: Step S1: transport the prefabricated track slab to a designated location, and roughly lay the prefabricated track slab on the laid arc shield segment; Step S2: screwing the support bolt into the prefabricated track plate through the support bolt hole, so that one end of the support bolt is screwed into the vibration-damping pad layer, and the screwed-in end of the support bolt is flush with the surface of the vibration-damping pad layer close to the wedge-shaped support block; fine-tuning the laying position of the prefabricated track plate by a fine-tuning vehicle, and installing the wedge-shaped support block in the reserved guide groove of the prefabricated plate under the prefabricated track plate; Step S3: grouting material is poured through the prefabricated track slab grouting holes to form a grouting layer, and the grouting layer is cured until the grouting layer reaches the design strength; Step S4: screwing the support bolts out of the prefabricated track slab from the support bolt holes, so that the vibration-damping pad layer and the filling layer are in contact, and the wedge-shaped support blocks cancel the support for the vibration-damping pad layer and the prefabricated track slab; Step S5: pouring secondary ballast bed at both ends of the filling layer, and laying and installing rails and fasteners on the prefabricated track slabs.

2. The construction method of the full-section prefabricated plate vibration-damping track structure according to claim 1 is characterized in that: The wedge-shaped support block (3) is a wedge-shaped block, and the thickness of the wedge-shaped support block (3) decreases along the insertion direction of the wedge-shaped support block (3); The two sides of the prefabricated track plate (1) are both provided with two prefabricated track plate reserved guide grooves (101) which are engaged with the wedge-shaped support blocks (3). Specifically, the two prefabricated track plate reserved guide grooves (101) on the same side of the prefabricated track plate (1) are arranged opposite to each other on the prefabricated track plate (1).

3. The construction method of the full-section prefabricated plate vibration-damping track structure according to claim 1 is characterized in that: The prefabricated track plate (1) is also provided with a pouring hole (103), and a pouring hole is provided in the pouring hole in the vibration damping pad area (204) of the vibration damping pad layer (2), and the pouring hole (103) completely overlaps with the pouring hole and is used for pouring the filling material layer (4).

4. The construction method of the full-section prefabricated plate vibration-damping track structure according to claim 1 is characterized in that: The vibration-damping pad layer (2) and the prefabricated track plate (1) are combined into one piece specifically as follows: the plate-side vibration-damping pad region (203) is provided with a plate-side vibration-damping pad end edge (203-1), and the plate-side vibration-damping pad end edge (203-1) is engaged with a vibration-damping pad slot (104) at the lower end of the prefabricated track plate (1), thereby achieving the vibration-damping pad layer (2) and the prefabricated track plate (1) being combined into one piece; A hole (202-1) that coincides with the support bolt hole (102) is disposed in the groove vibration damping pad region (202); The prefabricated track plate (1) is also provided with a reserved bolt hole (105), wherein the reserved bolt hole (105) is adjacent to the vibration-damping pad slot (104), and the vibration-damping pad layer (2) and the prefabricated track plate (1) can be bolted together by screwing a bolt into the reserved bolt hole (105); A secondary cast ballast bed (5) is provided at both ends of the filling layer (4), and a V-shaped water-proof thin pad (205) is also provided in the structure, one end of the V-shaped water-proof thin pad (205) is adhered to the bolt fixing position, and the other end of the V-shaped water-proof thin pad (205) is buried in the secondary cast ballast bed (5).

5. The construction method of the full-section prefabricated plate vibration-damping track structure according to claim 1 is characterized in that: The prefabricated track plate (1) is provided with two parallel steel rails (7), and each steel rail (7) is fixed to the prefabricated track plate (1) via a plurality of fasteners; A secondary cast ballast bed (5) is provided at both ends of the pouring layer (4), and a ballast bed drainage ditch (501) is provided on the surface of the secondary cast ballast bed (5); The prefabricated track slab (1) further comprises a rail support platform (106), wherein the rail support platform (106) is used for placing the steel rail (7).

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