Fabricated track structure facilitating vibration reduction upgrading and construction method

Abstract

The invention relates to a fabricated track structure facilitating vibration reduction upgrading and a construction method. According to the fabricated track structure convenient for vibration reduction upgrading, the prefabricated track plate is provided with a first supporting surface and an arrangement space, and the top surface of the base is provided with an embedded sleeve, so that a supporting adjusting piece or a special vibration reduction component can be detachably connected between the prefabricated track plate and the base through a fixing bolt; therefore, the replacement from the support adjusting piece to the special vibration reduction component can be realized, that is, common vibration reduction can be upgraded to special vibration reduction; and the corners are arranged through the prefabricated track plates, so that the second supporting surfaces of the prefabricated track plates are lower than the first supporting surfaces, and then the anti-vibration pads can be laid between the prefabricated track plates and the base after the supporting adjusting pieces are dismounted, namely common vibration reduction can be upgraded to high-level vibration reduction. According to the assembly type track structure facilitating vibration reduction and upgrading, conversion or upgrading from common vibration reduction to high-level vibration reduction and special vibration reduction can be achieved at the same time. And compared with the prior art, the replacement efficiency is high.

Description

Technical Field

[0001] The present invention relates to the field of rail transit technology, and in particular to an assembled track structure and a construction method that are convenient for vibration reduction and upgrading. Background Art

[0002] The existing rail transit prefabricated track structures mainly include III plate type ballastless track, self-compacting double-hole limited plate type ballastless track and base double-hole limited plate type ballastless track.

[0003] The III slab track is composed of rails, fasteners, track plates, isolation layers, self-compacting concrete, and a base. It is a three-layer structure of the ballast bed and uses double grooves on the base to limit the position.

[0004] The self-compacting double-hole limit plate ballastless track has the same structure as the III ballastless track, which is a three-layer trackbed structure and adopts self-compacting concrete double-hole limit.

[0005] The double-hole limit plate ballastless track at the base uses steel fiber concrete instead of self-compacting concrete and the base, and the trackbed structure is changed from three layers to two layers.

[0006] The existing rail transit prefabricated ballastless track has problems in the construction and operation stages. The main problems are as follows:

[0007] 1) Difficulty in upgrading vibration reduction. When upgrading to advanced vibration reduction, it is necessary to remove 30mm thick base concrete or self-compacting concrete, and then install vibration reduction pads. This method is difficult to construct, takes a long time to construct, affects line operation, and is prone to damage to the structure under the board. In addition, these three types of prefabricated tracks cannot be upgraded to special vibration reduction.

[0008] 2) Self-compacting concrete has high requirements and short pouring time, and the construction speed of precast panels with self-compacting concrete structure is slow.

[0009] 3) There are many types of track plates, including ordinary track plates, vibration damping plates, etc., which are not convenient for construction and operation and maintenance.

[0010] 4) Steel fiber concrete is difficult to pour, steel fibers tend to sink to the bottom, have poor workability, and are prone to bubbles.

[0011] 5) The reverse construction method is adopted, that is, the filling layer under the slab (self-compacting concrete or steel fiber concrete) is poured after the track slab is laid. The construction process is complicated and the construction efficiency is low. Summary of the invention

[0012] The purpose of the present invention is to overcome the difficulties in vibration reduction upgrading and transformation of the existing assembled ballastless track for rail transit, such as low construction efficiency and poor construction quality, and to provide an assembled track structure and construction method that are convenient for vibration reduction upgrading.

[0013] In a first aspect, the present invention provides an assembled track structure that is convenient for vibration reduction and upgrading, comprising a base, a plurality of prefabricated track plates, a rail support structure, fasteners, rails and a limit structure.

[0014] The top surface of the base is pre-buried with a plurality of vertically arranged pre-buried sleeves;

[0015] All the prefabricated track plates are arranged above the base at intervals along the length direction of the rails, and there are plate gaps between adjacent prefabricated track plates; the rail support structure is arranged on the prefabricated track plates, the rails are fixed to the rail support structure by the fasteners, and the limiting structure forms a horizontal limit for the prefabricated track plates;

[0016] All the prefabricated track plates have gaps with the top surface of the base, the bottom surface of the prefabricated track plate includes a first supporting surface and a second supporting surface, the first supporting surface is located on both sides of the prefabricated track plate, there is a setting space below the first supporting surface, a downward corner is provided at the transverse middle of the bottom of the prefabricated track plate adjacent to the setting space, and the setting space, the first supporting surface and the embedded sleeve can correspond to each other in the vertical direction;

[0017] It also includes a vibration-damping support member, which is a support adjustment member, a vibration-damping pad or a special vibration-damping component;

[0018] When the vibration-damping support member is a support adjustment member or a special vibration-damping component, the support adjustment member or the special vibration-damping component can be arranged in the arrangement space, the support adjustment member or the special vibration-damping component can be threadedly connected to the corresponding embedded sleeve through a fixing bolt, and the top of the support adjustment member or the special vibration-damping component can support the first support surface;

[0019] When the vibration-damping support member is a vibration-damping pad, the vibration-damping pad can be supported between the second supporting surface and the top surface of the base.

[0020] The assembled track structure that is easy to upgrade vibration reduction described in the present invention is a double-layer structure, and there is no direct contact between the base and the prefabricated track plate. The base and several prefabricated track plates are supported by vibration reduction support members, which can ensure the vibration reduction effect. The prefabricated track plate is provided with a first support surface and a setting space, and the top surface of the base is provided with an embedded sleeve, so that the support adjustment member or the special vibration reduction member can be detachably connected between the prefabricated track plate and the base by fixing bolts, so that the replacement from the support adjustment member to the special vibration reduction member can be realized, that is, it can be upgraded from ordinary vibration reduction to special vibration reduction; and the prefabricated track plate is provided with a turning angle, so that the second support surface of the prefabricated track plate is lower than the first support surface, so that after removing the support adjustment member, a vibration reduction pad can be laid between the prefabricated track plate and the base, that is, it can be upgraded from ordinary vibration reduction to advanced vibration reduction. This assembled track structure that is easy to upgrade vibration reduction can simultaneously meet the conversion or upgrade from ordinary vibration reduction to advanced vibration reduction and special vibration reduction, and in practical applications, compared with the prior art, its replacement efficiency is high. In addition, compared with the III slab ballastless track, the self-compacting double-hole limit slab ballastless track and the base double-hole limit slab ballastless track, this structure is simpler, the construction is faster and the construction quality is better controlled.

[0021] Preferably, the support adjustment member comprises an elastic pad, a precast steel plate, a precast concrete block and a track plate bottom pad stacked from bottom to top, the track plate bottom pad supports the first support surface, the elastic pad and the precast steel plate are connected to the embedded sleeve through the fixing bolts; the precast steel plate and the precast concrete block, and the precast concrete block and the track plate bottom pad are concave-convex matched;

[0022] The special vibration-damping component comprises the elastic pad, the prefabricated steel plate and a rubber spring from bottom to top, the top of the rubber spring supports the first supporting surface, and the bottom of the rubber spring is concave-convexly matched with the prefabricated steel plate.

[0023] The elastic pad is arranged between the base and the prefabricated steel plate to avoid hard contact between the base and the prefabricated steel plate, and to avoid damage or deformation of the base and the prefabricated steel plate. The prefabricated steel plate serves as the main support of the bottom. The prefabricated concrete block serves as the main support between the base and the prefabricated track plate, and at the same time as a height-adaptive component, the height of the prefabricated track plate can be adjusted by replacing prefabricated concrete blocks of different heights. The pad under the track plate is an elastic buffer layer to avoid hard contact between the prefabricated concrete block and the prefabricated track plate, and to avoid damage or deformation of the prefabricated concrete block and the prefabricated track plate. The concave-convex fit can achieve horizontal limiting and avoid damage to the support adjustment parts caused by sliding in the horizontal direction. The special vibration-damping component can replace only the structure above the prefabricated steel plate of the support adjustment part through the rubber spring, quickly forming a vibration reduction upgrade.

[0024] Preferably, the middle of the top surface of the precast steel plate and the precast concrete block are provided with a downward groove, and the middle of the bottom surface of the precast concrete block, the track plate bottom pad and the rubber spring are provided with a protrusion corresponding to the groove.

[0025] The above design can avoid the track slab bottom pad being too thick, thus saving costs.

[0026] Preferably, the cross-section of the groove is an isosceles trapezoid, and the notch of the groove is larger than the bottom of the groove, so as to facilitate the removal of the structure above the prefabricated steel plate during replacement.

[0027] Preferably, a height-adjusting pad is provided between the prefabricated steel plate and the prefabricated concrete block, a downward protrusion is provided in the middle of the bottom surface of the height-adjusting pad, and an upward groove is provided in the middle of the top surface of the height-adjusting pad.

[0028] Height adjustment plates allow the support adjustment to be raised and can also be used to level uneven substrates.

[0029] Preferably, the setting spaces are arranged at intervals along the length direction of the prefabricated track slab, so that the second supporting surface is enlarged, which can improve the vibration reduction effect of the prefabricated track slab itself.

[0030] Preferably, an observation port is provided on the outside of the setting space; from both sides of the prefabricated track plate to the middle, the observation port is inclined from top to bottom, which is convenient for observing the status of the supporting adjustment parts or special vibration-damping components in the setting space, and is conducive to avoiding risks in advance.

[0031] Preferably, a transversely embedded hoisting pipe is pre-embedded on the side of the prefabricated track plate, and the pre-embedded hoisting pipe is arranged between the longitudinally adjacent observation ports. The structural strength of the hoisting location is large, which can improve the stability and safety of the hoisting.

[0032] Preferably, the limiting structure comprises a plurality of prefabricated limiting columns, a buffer structure is sleeved on the outer side of the prefabricated limiting columns, and all the prefabricated limiting columns corresponding to each prefabricated track plate are arranged in a rectangular array, symmetrically in the transverse direction and symmetrically in the longitudinal direction;

[0033] The prefabricated track plate is provided with a first limiting hole vertically arranged corresponding to the prefabricated limiting column;

[0034] The base is provided with a second limiting hole vertically arranged corresponding to the prefabricated limiting column, and the prefabricated limiting column can be inserted into the corresponding first limiting hole and second limiting hole to form a horizontal limit for the prefabricated track plate; the prefabricated limiting column is inserted into the corresponding first limiting hole and second limiting hole to form a limit, which is convenient for releasing the limit during the later vibration reduction upgrade.

[0035] And / or, a drainage channel along the length direction is provided in the transverse middle part of the base, and the drainage channel is located between the vertical projections of two laterally adjacent setting spaces; it is capable of draining water from vibration-damping supports of different vibration-damping levels, thereby increasing the service life of the vibration-damping supports.

[0036] And / or, the prefabricated track slab is a common prefabricated track slab or a vibration-damping prefabricated track slab, and the common prefabricated track slab and the vibration-damping prefabricated track slab have the same plate thickness and plate length; the track slab type is unified to facilitate construction and subsequent operation and maintenance.

[0037] And / or, along the length direction of the rail, the space is set to separate two rail support structures; the safety of vibration reduction upgrade can be ensured, and compared with the space between one rail support structure, the number of support adjustment parts and special vibration reduction components required is small, and the economy is high;

[0038] And / or, the rail supporting structure is a rail supporting platform or a sleeper.

[0039] In a second aspect, the present invention provides a construction method for an assembled track structure that is convenient for vibration reduction and upgrading, which is used to construct the assembled track structure that is convenient for vibration reduction and upgrading, and comprises the following steps:

[0040] S1: Tie the base reinforcement and pour the base concrete;

[0041] S2: Install vibration-damping supports on the base to meet the laying requirements of prefabricated track slabs;

[0042] S3: placing the prefabricated track plate on the vibration-damping support, adjusting the position, and installing a limiting structure to limit the prefabricated track plate;

[0043] S4: Install fasteners on the rail-bearing structure on the prefabricated track slab;

[0044] S5: The rails are installed with fasteners and fine-tuned, and the construction is completed.

[0045] The construction method of the assembled track structure that is convenient for vibration reduction upgrading adopts a sequential construction method, that is, the base, vibration reduction support, prefabricated track plate, fasteners and rails are constructed in sequence from bottom to top, which optimizes the construction method, simplifies the construction process and improves the construction efficiency.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] 1. The present invention provides an assembled track structure that is easy to upgrade vibration reduction. By setting a first support surface and a setting space on the prefabricated track plate, and setting an embedded sleeve on the top surface of the base, the support adjustment member or the special vibration reduction member can be detachably connected between the prefabricated track plate and the base through fixing bolts, thereby enabling replacement from the support adjustment member to the special vibration reduction member, that is, upgrading from ordinary vibration reduction to special vibration reduction; and by setting an angle on the prefabricated track plate, the second support surface of the prefabricated track plate is lower than the first support surface, thereby laying a vibration reduction pad between the prefabricated track plate and the base after removing the support adjustment member, that is, upgrading from ordinary vibration reduction to advanced vibration reduction. This assembled track structure that is easy to upgrade vibration reduction can simultaneously meet the conversion or upgrade from ordinary vibration reduction to advanced vibration reduction and special vibration reduction, and in practical applications, compared with the prior art, its replacement efficiency is high. In addition, compared with the III slab ballastless track, the self-compacting double-hole limit slab ballastless track and the base double-hole limit slab ballastless track, this structure is simpler, the construction is faster and the construction quality is better controlled.

[0048] 2. The present invention provides a construction method for an assembled track structure that is convenient for vibration reduction upgrading. The method adopts a sequential construction method, that is, the base, vibration reduction support, prefabricated track plate, fasteners and rails are constructed from bottom to top in sequence, which optimizes the construction method, simplifies the construction process and improves the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic diagram of an assembled track structure that is convenient for vibration reduction upgrade (ordinary vibration reduction);

[0050] Figure 2 This is a schematic diagram of the plane laying of the prefabricated track slab;

[0051] Figure 3 It is a side schematic diagram of the prefabricated track slab;

[0052] Figure 4 It is a schematic diagram of the structure of the support adjustment member;

[0053] Figure 5 It is a schematic diagram of a prefabricated track structure that is easy to upgrade for vibration reduction (advanced vibration reduction);

[0054] Figure 6 It is a schematic diagram of a prefabricated track structure that is convenient for vibration reduction upgrade (special vibration reduction);

[0055] Figure 7 It is a structural schematic diagram of a special vibration-damping component.

[0056] Markings in the figure: 1. Base; 11. Drainage channel; 12. Embedded sleeve; 21. Support adjustment part; 211. Elastic pad; 212. Prefabricated steel plate; 213. Height adjustment pad; 214. Prefabricated concrete block; 215. Track plate bottom pad; 216. Fixing bolt; 22. Vibration damping pad; 23. Special vibration damping component; 231. Rubber spring; 3. Prefabricated track plate; 31. Setting space; 32. Observation port; 33. Prefabricated limit column; 34. Embedded lifting pipe; 35. Corner; 36. First supporting surface; 37. Second supporting surface; 4. Rail support platform; 5. Fastener; 6. Rail; 7. Plate seam. DETAILED DESCRIPTION

[0057] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0058] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or are the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0059] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0060] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0061] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0062] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0063] Example 1

[0064] like Figure 1-Figure 7 As shown, an assembled track structure that is convenient for vibration reduction upgrading includes a base 1, a plurality of prefabricated track plates 3, a track-bearing structure, fasteners 5, rails 6, a limiting structure and a vibration reduction support.

[0065] like Figure 1 As shown, a plurality of vertically arranged pre-buried sleeves 12 are pre-buried on the top surface of the base 1;

[0066] like Figure 2 and Figure 3 As shown, all the prefabricated track plates 3 are arranged above the base 1 at intervals along the length direction of the rail 6, and there is a plate gap 7 between adjacent prefabricated track plates 3; the rail support structure is arranged on the prefabricated track plates 3, wherein the rail support structure is a rail support platform 4 or a sleeper, such as Figure 2 As shown, the rail supporting structure is a rail supporting platform 4, and the rail supporting platform 4 and the prefabricated track plate 3 are an integrally formed structure, which is easy to install and has better overall force bearing capacity.

[0067] like Figure 1 As shown, the steel rail 6 is fixed to the rail support structure by the fastener 5, and this fixing method adopts the existing technical means. The limiting structure forms a horizontal limit for the prefabricated track plate 3; the limiting structure can adopt a limiting column. Generally, a limiting hole is left on the prefabricated track plate 3, and after the prefabricated track plate 3 is installed, a limiting column is formed at the limiting hole by casting. As a preferred embodiment, Figure 2As shown, the limiting structure includes a plurality of prefabricated limiting columns 33, and a buffer structure is sleeved on the outer side of the prefabricated limiting columns 33. All the prefabricated limiting columns 33 corresponding to each prefabricated track plate 3 are arranged in a rectangular array, symmetrically in the horizontal direction and symmetrically in the vertical direction; the prefabricated track plate 3 is provided with a first limiting hole vertically arranged corresponding to the prefabricated limiting column 33; the base 1 is provided with a second limiting hole vertically arranged corresponding to the prefabricated limiting column 33, and the prefabricated limiting column 33 can be inserted into the corresponding first limiting hole and the second limiting hole to form a horizontal limit for the prefabricated track plate 3; the prefabricated limiting column 33 is inserted into the corresponding first limiting hole and the second limiting hole to form a limit, which is convenient for releasing the limit during the later vibration reduction upgrade. And the buffer structure around the prefabricated limiting column 33 can prevent the prefabricated limiting column 33 from shaking relative to the prefabricated track plate 3 and the base 1 at the first limiting hole and the second limiting hole respectively, under the premise of ensuring that the prefabricated limiting column 33 can be inserted into the first limiting hole and the second limiting hole, so as to avoid damage.

[0068] like Figure 1 As shown, all the prefabricated track plates 3 have a gap with the top surface of the base 1 to avoid direct contact between the two. The bottom surface of the prefabricated track plate 3 includes a first support surface 36 and a second support surface 37. The first support surface 36 is located on both sides of the prefabricated track plate 3, and there is a setting space 31 below the first support surface 36. A downward corner 35 is provided in the horizontal middle of the bottom of the prefabricated track plate 3 near the setting space 31, so that the second support surface 37 is lower than the first support surface 36. The setting space 31, the first support surface 36 and the embedded sleeve 12 can correspond to each other in the vertical direction.

[0069] The vibration-damping support member is a support adjustment member 21, a vibration-damping pad 22 or a special vibration-damping member 23;

[0070] like Figure 1 and Figure 6 As shown, when the vibration-damping support member is a support adjustment member 21 or a special vibration-damping component 23, the support adjustment member 21 or the special vibration-damping component 23 can be arranged in the arrangement space 31, the support adjustment member 21 or the special vibration-damping component 23 can be threadedly connected to the corresponding embedded sleeve 12 through a fixing bolt 216, and the top of the support adjustment member 21 or the special vibration-damping component 23 can support the first supporting surface 36. When the support adjustment member 21 supports the first supporting surface 36, it is ordinary vibration-damping. When the special vibration-damping component 23 supports the first supporting surface 36, it is special vibration-damping.

[0071] like Figure 1 and Figure 4As shown, the support adjustment member includes an elastic pad 211, a precast steel plate 212, a precast concrete block 214 and a track plate bottom pad 215 stacked from bottom to top. The elastic pad 211 and the precast steel plate 212 are connected to the embedded sleeve 12 through the fixing bolts 216. The elastic pad 211 is arranged between the base and the precast steel plate 212 to avoid hard contact between the base and the precast steel plate 212, and to avoid damage or deformation of the base and the precast steel plate 212. The precast steel plate 212 serves as the main support of the bottom. The precast concrete block 214 serves as the main support between the base and the precast track plate 3, and also as a height adaptation component. The track plate bottom pad 215 supports the first support surface 36, and can adjust the height of the precast track plate 3 by replacing precast concrete blocks 214 of different heights. The track plate bottom pad 215 is an elastic buffer layer made of rubber material to avoid hard contact between the precast concrete block 214 and the precast track plate 3, and to avoid damage or deformation of the precast concrete block 214 and the precast track plate 3. The concave-convex fit between the precast steel plate 212 and the precast concrete block 214, and between the precast concrete block 214 and the track plate bottom pad 215 can achieve horizontal limit, avoiding damage to the support adjustment member caused by horizontal slip. The support adjustment member 21 has a large adjustment range, can adapt to areas with large civil construction errors, and can also limit the precast track plate.

[0072] As a better choice, Figure 4 For example, the middle of the top surface of the precast steel plate 212 and the precast concrete block 214 are provided with a downward groove, and the middle of the bottom surface of the precast concrete block 214 and the track plate bottom pad 215 are provided with a protrusion that matches the groove. The above design can avoid the track plate bottom pad 215 from being too thick, saving costs. Figure 4 For example, the cross-section of the groove is an isosceles trapezoid, and the groove opening of the groove is larger than the groove bottom, which is convenient for removing the structure above the prefabricated steel plate 212 during replacement, such as facilitating the removal of the prefabricated concrete block 214 from the groove of the prefabricated steel plate 212.

[0073] As a better choice, Figure 4 For example, a height adjustment pad 213 is provided between the prefabricated steel plate 212 and the prefabricated concrete block 214, and a downward protrusion is provided in the middle of the bottom surface of the height adjustment pad 213, and an upward groove is provided in the middle of the top surface of the height adjustment pad 213. The height adjustment pad 213 can adjust the height of the support adjustment member and level the uneven base.

[0074] like Figure 1 and Figure 6As shown, the special vibration-damping component 23 includes the elastic pad 211, the prefabricated steel plate 212 and the rubber spring 231 from bottom to top. The top of the rubber spring 231 supports the first supporting surface 36. The bottom of the rubber spring 231 is matched with the prefabricated steel plate 212 in a concave-convex manner. The concave-convex matching can achieve horizontal limit and avoid the support adjustment part from being damaged due to horizontal slippage. The middle part of the bottom surface of the rubber spring 231 is provided with a protrusion that matches the groove and can be adapted to Figure 4 The design in the embodiment matches the special vibration-damping component 23, which is convenient for vibration-damping upgrade and replacement. That is, the special vibration-damping component 23 can only replace the structure above the prefabricated steel plate 212 of the supporting adjustment part through the rubber spring 231, thereby quickly forming a vibration-damping upgrade.

[0075] like Figure 5 As shown, when the vibration-damping support member is a vibration-damping pad 22, the vibration-damping pad 22 can be supported between the second supporting surface 37 and the top surface of the base 1 to form a high degree of vibration reduction.

[0076] As a better choice, Figure 3 As shown, the setting spaces 31 are arranged at intervals along the length direction of the prefabricated track plate 3, so that the second supporting surface is increased, the mass of the prefabricated track plate 3 is increased, the vibration reduction effect of the prefabricated track plate 3 itself can be improved, and the vibration reduction effect of the high-level vibration reduction can be improved.

[0077] As a better choice, Figure 1 and Figure 3 As shown, an observation port 32 is provided on the outside of the setting space 31; from both sides of the prefabricated track plate 3 to the middle, the observation port 32 is inclined from top to bottom, which is convenient for observing the status of the supporting adjustment parts or special vibration-damping components 23 in the setting space 31, which is conducive to avoiding risks in advance.

[0078] As a better choice, Figure 1 and Figure 3 As shown, a transversely embedded hoisting pipe 34 is embedded in the side of the prefabricated track plate 3, and the embedded hoisting pipe 34 is arranged between the longitudinally adjacent observation ports 32. The structural strength of the hoisting part is large, which can improve the stability and safety of the hoisting.

[0079] As a better choice, Figure 1 , Figure 5 and Figure 6 As shown, a drainage channel 11 along the length direction is provided in the transverse middle part of the base 1, and the drainage channel 11 is located between the vertical projections of two laterally adjacent setting spaces 31; it can discharge water from the vibration-damping supports of three different vibration-damping levels, namely ordinary vibration-damping, advanced vibration-damping and special vibration-damping, thereby increasing the service life of the vibration-damping supports.

[0080] As a preferred choice, the prefabricated track plate 3 is a common prefabricated track plate or a vibration-damping prefabricated track plate, and the common prefabricated track plate and the vibration-damping prefabricated track plate have the same plate thickness and plate length; the track plate type is unified to facilitate construction and later operation and maintenance. If the common prefabricated track plate used in the prefabricated track plate 3 is replaced with a vibration-damping prefabricated track plate, it is more convenient. For example, the plate width of the common prefabricated track plate or the vibration-damping prefabricated track plate is 2600mm, the plate length is 3550mm or 4750mm, and the plate thickness is 330mm.

[0081] As a better choice, Figure 2 As shown, along the length direction of the rail 6, the setting space 31 is arranged at intervals of two rail support structures; the safety of vibration reduction upgrade can be ensured, and compared with the arrangement at intervals of one rail support structure, the number of support adjustment members 21 and special vibration reduction components 23 required is small, and the economy is high;

[0082] The assembled track structure for vibration reduction upgrade described in this embodiment is a double-layer structure. The base 1 and the prefabricated track slabs 3 are not in direct contact. The base 1 and the prefabricated track slabs 3 are supported by vibration reduction supports, which can ensure the vibration reduction effect. It adopts a two-layer ballast structure, cancels self-compacting concrete, does not use steel fiber concrete, uses vibration reduction supports to connect the base and prefabricated track slabs, reduces the amount of concrete pouring on site, and speeds up the construction progress. The prefabricated track plate 3 is provided with a first support surface 36 and a space 31, and an embedded sleeve 12 is provided on the top surface of the base 1, so that the support adjustment member 21 or the special vibration-damping component 23 can be detachably connected between the prefabricated track plate 3 and the base 1 through the fixing bolts 216, thereby enabling replacement from the support adjustment member 21 to the special vibration-damping component 23, that is, ordinary vibration reduction can be upgraded to special vibration reduction; and the prefabricated track plate 3 is provided with a corner 35, so that the second support surface 37 of the prefabricated track plate 3 is lower than the first support surface 36, so that after the support adjustment member 21 is removed, a vibration-damping pad 22 can be laid between the prefabricated track plate 3 and the base 1, that is, ordinary vibration reduction can be upgraded to advanced vibration reduction. This assembled track structure that is easy to upgrade vibration reduction can simultaneously meet the conversion or upgrade from ordinary vibration reduction to advanced vibration reduction and special vibration reduction. That is, in the operation stage, after sawing, dismantling, and hoisting the prefabricated track plate 3, the support adjustment part 21 can be replaced with a vibration reduction pad 22 or a special vibration reduction component 23 to achieve vibration reduction upgrade and transformation. In actual application, compared with the existing technology, its replacement efficiency is high. It can quickly upgrade advanced vibration reduction and special vibration reduction during the line operation period, reduce vibration noise, and reduce complaints from residents along the line, which can meet the needs of the current rapid development of society.

[0083] In addition, compared with the III slab ballastless track, the self-compacting double-hole limited slab ballastless track and the base double-hole limited slab ballastless track, this structure is simpler, the construction is faster and the construction quality is better controlled.

[0084] Example 2

[0085] A construction method for an assembled track structure that is convenient for vibration reduction and upgrading, used for constructing the assembled track structure that is convenient for vibration reduction and upgrading, comprises the following steps:

[0086] S1: Tie up the base 1 steel bars and pour the base 1 concrete;

[0087] S2: Install a vibration-damping support member on the base 1 to meet the laying requirements of the prefabricated track slab 3; if the vibration-damping support member is a support adjustment member 21, install the support adjustment member according to the setting space of the prefabricated track slab 3, fix it to the lower base by fixing bolts, and adjust the height of the support adjustment member according to the on-site measurement, such as by replacing prefabricated concrete blocks 214 of different heights to meet the laying requirements of the track slab; if the vibration-damping support member is a vibration-damping pad 22, lay the vibration-damping pad 22 on the base 1; if the vibration-damping support member is a special vibration-damping component 23, install the special vibration-damping component 23 according to the setting space of the prefabricated track slab 3, fix it to the lower base by fixing bolts, and meet the laying requirements of the prefabricated track slab 3;

[0088] S3: Place the prefabricated track plate 3 on the vibration-damping support, adjust the position, and then install the limiting structure to limit the prefabricated track plate 3; when the limiting structure is a prefabricated limiting column, the prefabricated track plate 3 is prefabricated with a first limiting hole; in step S1, a second limiting hole needs to be reserved according to the first limiting hole, and a corresponding embedded sleeve 12 needs to be pre-buried according to the setting space of the prefabricated track plate 3; in step S3, the prefabricated limiting column is inserted into the corresponding first limiting hole of the prefabricated track plate 3 and the corresponding second limiting hole of the base to limit the prefabricated track plate 3;

[0089] S4: Installing fasteners 5 on the rail-bearing structure on the prefabricated track slab 3;

[0090] S5: The rail 6 is installed through the fastener 5 and fine-tuned, and the construction is completed.

[0091] The construction method of the assembled track structure that is convenient for vibration reduction upgrading adopts a sequential construction method, that is, the base, vibration reduction support, prefabricated track plate, fasteners and rails are constructed in sequence from bottom to top, which optimizes the construction method, simplifies the construction process and improves the construction efficiency.

[0092] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An assembled track structure that is convenient for vibration reduction and upgrading, comprising a base (1), a plurality of prefabricated track plates (3), a track support structure, a fastener (5), a steel rail (6) and a limiting structure, characterized in that: The top surface of the base (1) is pre-buried with a plurality of vertically arranged pre-buried sleeves (12); All the prefabricated track plates (3) are arranged above the base (1) at intervals along the length direction of the steel rail (6), and there is a plate gap (7) between adjacent prefabricated track plates (3); the rail support structure is arranged on the prefabricated track plate (3), the steel rail (6) is fixed to the rail support structure by the fastener (5), and the limiting structure forms a horizontal limit for the prefabricated track plate (3); All the prefabricated track plates (3) have a gap with the top surface of the base (1); the bottom surface of the prefabricated track plate (3) comprises a first supporting surface (36) and a second supporting surface (37); the first supporting surface (36) is located on both sides of the prefabricated track plate (3); a setting space (31) is provided below the first supporting surface (36); a downward turning corner (35) is provided at the transverse middle of the bottom of the prefabricated track plate (3) adjacent to the setting space (31); the setting space (31), the first supporting surface (36) and the embedded sleeve (12) can correspond to each other in the vertical direction; It also includes a vibration-damping support member, wherein the vibration-damping support member is a support adjustment member (21), a vibration-damping pad (22) or a special vibration-damping component (23); When the vibration-damping support member is a support adjustment member (21) or a special vibration-damping component (23), the support adjustment member (21) or the special vibration-damping component (23) can be arranged in the arrangement space (31), the support adjustment member (21) or the special vibration-damping component (23) can be threadedly connected to the corresponding embedded sleeve (12) via a fixing bolt (216), and the top of the support adjustment member (21) or the special vibration-damping component (23) can support the first support surface (36); When the vibration-damping support member is a vibration-damping pad (22), the vibration-damping pad (22) can be supported between the second supporting surface (37) and the top surface of the base (1).

2. The assembled track structure that is convenient for vibration reduction upgrade according to claim 1 is characterized in that: The support adjustment member (21) comprises an elastic pad (211), a precast steel plate (212), a precast concrete block (214) and a track plate bottom pad (215) stacked from bottom to top, the track plate bottom pad (215) supports the first support surface (36), the elastic pad (211) and the precast steel plate (212) are connected to the embedded sleeve (12) through the fixing bolts (216); the precast steel plate (212) and the precast concrete block (214), and the precast concrete block (214) and the track plate bottom pad (215) are matched with each other in a concave-convex manner; The special vibration-damping component (23) comprises, from bottom to top, the elastic pad (211), the prefabricated steel plate (212) and a rubber spring (231); the top of the rubber spring (231) supports the first supporting surface (36); and the bottom of the rubber spring (231) is concavely matched with the prefabricated steel plate (212).

3. The assembled track structure that is convenient for vibration reduction upgrade according to claim 2 is characterized in that: The middle of the top surface of the precast steel plate (212) and the precast concrete block (214) are provided with a downward groove, and the middle of the bottom surface of the precast concrete block (214), the track plate bottom pad (215), and the rubber spring (231) are provided with a protrusion adapted to correspond to the groove.

4. The assembled track structure for facilitating vibration reduction upgrade according to claim 3, characterized in that: The cross section of the groove is an isosceles trapezoid, and the notch of the groove is larger than the groove bottom.

5. The assembled track structure that is convenient for vibration reduction and upgrading according to claim 4 is characterized in that: A height adjustment pad (213) is also provided between the prefabricated steel plate (212) and the prefabricated concrete block (214), the middle portion of the bottom surface of the height adjustment pad (213) is provided with the downward protrusion, and the middle portion of the top surface of the height adjustment pad (213) is provided with the upward groove.

6. The assembled track structure that is convenient for vibration reduction and upgrading according to claim 1 is characterized in that: The arrangement spaces (31) are arranged at intervals along the length direction of the prefabricated track plate (3).

7. The assembled track structure for vibration reduction upgrade according to claim 6, characterized in that: An observation port (32) is arranged outside the setting space (31); from both sides of the prefabricated track plate (3) to the middle, the observation port (32) is in an inclined state from top to bottom.

8. The assembled track structure for vibration reduction upgrade according to claim 7, characterized in that: A transversely arranged pre-buried hanging pipe (34) is pre-buried on the side surface of the prefabricated track plate (3), and the pre-buried hanging pipe (34) is arranged between the longitudinally adjacent observation ports (32).

9. An assembled track structure that is convenient for vibration reduction and upgrading according to any one of claims 1 to 8, characterized in that: The limiting structure comprises a plurality of prefabricated limiting columns (33), a buffer structure is sleeved on the outer side of the prefabricated limiting columns (33), and all the prefabricated limiting columns (33) corresponding to each prefabricated track plate (3) are arranged in a rectangular array, symmetrically in the transverse direction and symmetrically in the longitudinal direction; The prefabricated track plate (3) is provided with a first limiting hole vertically arranged corresponding to the prefabricated limiting column (33); The base (1) is provided with a second limiting hole arranged vertically corresponding to the prefabricated limiting column (33), and the prefabricated limiting column (33) can be inserted into the corresponding first limiting hole and second limiting hole to form a horizontal limit for the prefabricated track plate (3); And / or, a drainage channel (11) is provided in the transverse middle portion of the base (1) along the length direction, and the drainage channel (11) is located between the vertical projections of two laterally adjacent arrangement spaces (31); And / or, the prefabricated track plate (3) is a common prefabricated track plate or a vibration-damping prefabricated track plate, and the common prefabricated track plate and the vibration-damping prefabricated track plate have the same plate thickness and plate length; and / or, along the length direction of the steel rail (6), the setting space (31) is arranged to separate two of the rail-supporting structures; And / or, the rail supporting structure is a rail supporting platform (4) or a sleeper.

10. A construction method for an assembled track structure that is convenient for vibration reduction and upgrading, characterized in that: The method for constructing a prefabricated track structure for vibration reduction upgrade as claimed in any one of claims 1 to 9 comprises the following steps: S1: Tie the base (1) steel bars and pour the base (1) concrete; S2: Installing a vibration-damping support member on the base (1) to meet the laying requirements of the prefabricated track slab (3); S3: placing the prefabricated track plate (3) on the vibration-damping support member, adjusting the position, and installing a limiting structure to limit the prefabricated track plate (3); S4: Installing a fastener (5) on the rail support structure on the prefabricated track plate (3); S5: The rail (6) is installed by means of the fastener (5) and fine-tuned, and the construction is completed.

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