CN109853301B - Plate-type ballastless track bed with back pressure device - Google Patents
Plate-type ballastless track bed with back pressure device Download PDFInfo
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- CN109853301B CN109853301B CN201910221316.6A CN201910221316A CN109853301B CN 109853301 B CN109853301 B CN 109853301B CN 201910221316 A CN201910221316 A CN 201910221316A CN 109853301 B CN109853301 B CN 109853301B
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- track
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
- E01B1/002—Ballastless track, e.g. concrete slab trackway, or with asphalt layers
Abstract
The invention belongs to the technical field of rail transit, and discloses a slab ballastless track bed with a back pressure device, which comprises a substrate, a track slab arranged above the substrate, a slab lower filling layer arranged between the track slab and the substrate, a limit structure arranged between the track slab and the substrate, and a back pressure device, wherein the back pressure device comprises a back pressure elastic element, a connecting piece and an anchoring piece; the track slab is provided with a mounting channel, a back pressure elastic element is arranged above the track slab and corresponds to the mounting channel, an anchoring part is fixedly arranged on the substrate and corresponds to the mounting channel, and the connecting part is assembled and connected with the anchoring part through the mounting channel to compress the back pressure elastic element on the track slab. The plate-type ballastless track bed with the back pressure device has the advantages of simple structure, low vibration and noise level, good vibration and noise reduction performance and long service life, can be widely applied to various ballastless track lines of high-speed railways, and has wide market application prospect.
Description
The application is a divisional application with the application number of CN201611252811.6 and the name of 'plate-type ballastless track bed with back pressure device' filed by the applicant in 2016, 12, month and 30.
Technical Field
The invention belongs to the technical field of rail transit, and particularly relates to a plate-type ballastless track bed capable of preventing a track plate and a CA mortar adjusting layer from being stripped.
Background
In recent years, with the rapid development of the passenger dedicated line of the high-speed railway in China, the ballastless track has the advantages of high precision, high construction speed, good stability, less maintenance workload, easy quality control, low manufacturing cost, high comprehensive economic benefit and the like, is more and more widely applied to the high-speed railway at home and abroad, the laying range of the ballastless track is gradually developed to the roadbed from the beginning bridge and tunnel engineering, and the ballastless track is gradually and vigorously popularized on intercity railways, passenger dedicated lines and high-speed railways. At present, three types of plate-type ballastless tracks mainly comprising CRTSI, CRTSII and CRTSIII are more applied. The three types of basic structures comprise a steel rail, an elastic fastener, a rail plate, a plate lower filling layer and a base from top to bottom, and in addition, a limiting device is arranged between the rail plate and the base. The CRTSIII type plate ballastless track and the CRTSIII type plate ballastless track have the main differences and advantages that: (1) the material of the underfloor filling layer is changed from the prior CA mortar into self-compacting concrete, thereby simplifying the construction process, reducing the environmental pollution and reducing the engineering investment; (2) the CRTSIII type slab ballastless track adopts a limiting mode that the lower U-shaped ribs of the slab and the self-compacting concrete are matched with the grooves of the base, completely cancels the limiting bosses of the CRTSI type slab and the end limiting thorns of the CRTSII type slab, and is more concise and safer; (3) the original rail plate without the shoulder blocking plate is changed into the rail plate with the shoulder blocking plate, and the matched elastic non-separating fastener is favorable for reducing the rigidity of the rail and improving the elasticity of the rail. However, in the using process, the high-speed railway vehicle is high in running speed and strong in vibration, so that the situation that the track slab and the filling layer under the slab are peeled off and arched is caused no matter whether the filling layer under the slab is made of CA mortar or self-compacting concrete due to vibration, thermal expansion, cold contraction and other reasons after a period of operation, the track slab and the filling layer under the slab are in a suspended state after being partially peeled off, and during subsequent operation, the track slab can sink repeatedly to impact the filling layer under the slab, so that cracks are developed and enlarged continuously. Therefore, once the track slab and the underfloor filling layer are stripped, the integrity of the slab ballastless track is greatly reduced, the vibration and radiation noise of the track structure in the operation process are stronger, the comfort of a vehicle is influenced, a plurality of adverse effects are caused on the service life of the track structure, the driving safety is even endangered in serious situations, and at present, a good repairing method is not available, and only passive measures such as speed limiting can be taken.
To sum up, the market urgently needs to provide a novel plate-type ballastless track bed structure which can effectively prevent the track plate and the lower filling layer of the plate from being stripped.
Disclosure of Invention
The invention aims to solve the problems and provides a slab ballastless track bed with a back pressure device, which has better integrity and can effectively avoid the stripping of a track slab and a filling layer under the slab.
The slab ballastless track bed with the counter-pressure device is realized by the following steps that the slab ballastless track bed comprises a base, a track slab is arranged above the base, a slab lower filling layer is arranged between the track slab and the base, and a limiting structure is arranged between the track slab and the base; the anchoring piece is fixedly arranged on the substrate; the elastic back-pressure element is arranged between the connecting piece and the anchoring piece, or one end of the elastic back-pressure element acts on the track plate, the other end of the elastic back-pressure element acts on the connecting piece, and the connecting piece is connected with the substrate through the anchoring piece.
The back pressure elastic element comprises a spiral steel spring, a disc spring and an elastic block made of high polymer materials or a composite spring made of high polymer materials and metal. The high polymer material comprises elastic rubber, elastic polyurethane, elastic plastic and the like.
The back pressure device can also comprise a pressure equalizing plate, the back pressure elastic element is a compression spring, the pressure equalizing plate is arranged at the end part of the back pressure elastic element, and the connecting piece is matched with the pressure equalizing plate to provide pretightening force to press the back pressure elastic element on the track plate. Preferably, the pre-compression stroke of the compression spring in the counter-pressure device is greater than 110% of the maximum downward deformation of the track plate in the operating state. In addition, the arrangement mode of the back pressure device can be various, and the back pressure device can be arranged on two sides of the track plate; or the track plate is provided with an installation channel, the substrate is fixedly provided with an anchoring piece corresponding to the installation channel, and the connecting piece penetrates through the installation channel to be assembled and connected with the anchoring piece fixedly arranged on the substrate. In addition, a damping element may also be included in the counter-pressure device. The damping element can be of various types, and comprises a small hole throttling type damping device, a viscous damping device, an eddy current damping device, a magnetorheological damping device, a viscoelastic damping device and other specific forms.
In the present invention, the specific form of the connecting member may be various, for example, the connecting member includes a hook, an ear plate having a hooking hole, a nut, a bracket having a connecting flange, a suspension ring, a connecting rod having a hooking block, and a connecting rod having an internal thread or an external thread. Correspondingly, the anchoring part is provided with a threaded hole, a stud, a hook, an ear plate with a hanging hole, a connecting flange and a pre-buried channel or a hanging ring which are used for being assembled and connected with the connecting part.
According to the slab ballastless track bed with the counter-pressure device, the counter-pressure device is additionally arranged in the track bed system, the counter-pressure pretightening force provided by the counter-pressure device is utilized to ensure that the track slab and the underfloor filling layer of the slab are always in a close contact state, so that the stripping between the track slab and the underfloor filling layer of the slab can be effectively avoided, and the stripping can not be suspended, so that the integrity and the safety of the track bed system can be effectively improved. In addition, the back pressure elastic element arranged in the back pressure device can adopt elements with good damping performance such as a rubber elastic block, a polyurethane elastic block or a rubber-plastic metal composite spring, and the like, and the back pressure device can also be independently provided with the damping element, so that after the back pressure device with the structure is additionally arranged, the system damping of the plate-type ballastless track bed with the back pressure device can be effectively increased, the dynamic impact in the operation process of a railway vehicle can be better buffered, the vibration energy is quickly attenuated, the vibration and noise reduction effects are remarkably improved, the comfort and the safety in the operation process of the railway vehicle are favorably improved, and the service life of the track bed system is prolonged.
It should be noted that the substrate in the present invention may be a concrete slab substrate or a steel bridge deck of a steel bridge, for example, the hook may be welded on the steel bridge deck and then hooked with the back pressure elastic element, and the fixing connection mode of the anchor member and the substrate may be selected according to the specific substrate form
Particularly, in the slab ballastless track bed with the counter-pressure device, the counter-pressure pretightening force is provided by the counter-pressure device to ensure that the track slab and the underfilling layer of the slab are always in a close contact state, and the adhesion of the underfilling layer of the slab and the track slab is not depended on, so that the underfilling layer of the slab and the track slab can be arranged without adhesion, the maintenance and the replacement at the later stage are facilitated, and an isolation film and the like can be arranged between the underfilling layer of the slab and the track slab in a specific mode; in addition, the material selection range of the underfloor filling layer is wider, for example, the underfloor filling layer can be composed of high-elasticity mortar, an elastic vibration damping pad or an elastic vibration damping block, and the underfloor filling layer has the following advantages: (1) the vibration reduction performance can be better considered, and the vibration reduction and noise reduction level of the system is improved; (2) the variety of the selected materials is beneficial to reducing the construction cost and the construction difficulty; (3) the breadth of China is vast, the climate change is various, and the expansion of the material selection range is more favorable for improving the applicability of the plate-type ballastless track bed with the back pressure device; (4) and convenience is provided for later maintenance.
In summary, the slab ballastless track bed with the back pressure device has the advantages of simple structure, low vibration and noise level, good vibration and noise reduction performance and long service life, can be widely applied to various ballastless track lines of high-speed railways, and has wide market application prospect.
Drawings
Fig. 1 is a schematic structural diagram of a slab ballastless track bed with a back pressure device according to the present invention.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Fig. 3 is a second schematic structural diagram of the slab ballastless track bed with the back pressure device according to the present invention.
Fig. 4 is a third schematic structural diagram of the slab ballastless track bed with the back pressure device according to the present invention.
Fig. 5 is a fourth schematic structural diagram of the slab ballastless track bed with the back pressure device according to the present invention.
Fig. 6 is a fifth schematic structural view of the slab ballastless track bed with the back pressure device according to the present invention.
Fig. 7 is a sixth schematic structural view of the slab ballastless track bed with the back pressure device according to the present invention.
Fig. 8 is a seventh schematic structural diagram of the slab ballastless track bed with the back pressure device according to the present invention.
Fig. 9 is a sectional view taken along line B-B of fig. 8.
In the figure: 1. a track plate; 2. a substrate; 3. a underfloor fill layer; 4. a limiting structure; 5. an anchoring member; 6. a connecting member; 7. a counter-pressure resilient element; 8. a track structure; 9. a pressure equalizing plate; 10. a damping element; 11. a fastener; 12. a boss; 13. installing a channel; 14. a partial recess.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following describes the slab ballastless track bed with the back pressure device according to the present invention with reference to the accompanying drawings and specific examples.
The first embodiment is as follows:
as shown in fig. 1 and fig. 2, the slab ballastless track bed with the back pressure device of the invention includes a base 2, a track slab 1 is disposed above the base 2, a slab lower filling layer 3 is disposed between the track slab 1 and the base 2, the slab lower filling layer 3 is specifically made of a CA mortar material, a limit structure 4 is further disposed between the track slab 1 and the base 2, and the limit structure 4 is specifically a boss 12 integrally disposed with the base 2; in addition, the back pressure device is further included, the back pressure device comprises a back pressure elastic element 7, a connecting piece 6 and an anchoring piece 5, specifically, the back pressure elastic element 7 is a tensile type spiral steel spring, the connecting piece 6 and the anchoring piece 5 are both lug plates with hanging holes, the anchoring piece 5 is fixedly arranged on the substrate 2, the connecting piece 6 is fixedly arranged in the track plate 1, and the back pressure elastic element 7 is hung between the connecting piece 6 and the anchoring piece 5.
As shown in fig. 1 and 2, the track structure 8 may be fixed to the track plate 1. The track structure 8 comprises specific elements such as rails, clip systems, rail pads, etc., which are not shown for convenience of illustration and are therefore described herein since they are less relevant to the inventive aspects of the present invention.
According to the slab ballastless track bed with the counter-pressure device, the counter-pressure device is additionally arranged in the track bed system, continuous counter-pressure pretightening force is provided between the track slab 1 and the underfloor filling layer 3 by the counter-pressure device, the counter-pressure pretightening force can ensure that the track slab 1 and the underfloor filling layer 3 are always in a close contact state, stripping between the track slab 1 and the underfloor filling layer 3 can be effectively avoided, and suspension can not be generated even if stripping is carried out, so that the integrity of the track bed system can be effectively improved, the comfort and the safety of a track vehicle in the operation process can be improved, and the service life of the track bed system can be prolonged. According to the plate-type ballastless track bed with the back pressure device, continuous back pressure pretightening force is provided between the track plate 1 and the underfloor filling layer 3 by the back pressure device, the track plate 1 and the underfloor filling layer 3 are not easy to crack, even the crack occurs, the track plate 1 and the underfloor filling layer 3 are always kept in close contact without a gap under the action of the back pressure pretightening force, suspension and sinking impact does not exist during driving, the crack is slowly expanded, vibration and noise are not obviously increased, and the influence on driving is small.
Of course, based on the technical principle described in this example, the specific forms of the connecting element 6 and the anchoring element 5 in the present invention can be varied, for example, besides the mentioned ear plate with hanging hole, the connecting element 6 can also be a hook or a hanging ring; similarly, the anchoring member 5 may also be provided with a hook or a suspension loop for assembling and connecting with the connecting member 6, which can achieve the same technical effect. In addition, the specific form of the limiting structure 4 in the invention can be various, besides the mentioned boss 12 integrally arranged with the substrate 2, the limiting structure can also be an end limiting thorn of a CRTSII type plate, and a good technical effect can also be realized.
It should be noted that the base 2 of the present invention may be a concrete slab base or a steel bridge deck of a steel bridge, for example, a hook may be welded on the steel bridge deck and then hooked with the back pressure elastic element 7, and the same technical effect may be achieved by selecting a suitable fixing connection manner of the anchor 5 and the base 2 according to a specific form of the base 2, and within the scope of protection claimed by the present invention, this feature is also applicable to other embodiments of the present invention, and will not be repeated herein.
The plate-type ballastless track bed with the back pressure device has the advantages of simple structure, low vibration and noise level and long service life, can be widely applied to ballastless track lines of high-speed railways, and has wide market application prospect.
Example two:
the slab ballastless track bed with the back pressure device shown in fig. 3 is different from the first embodiment in that in the back pressure device of this embodiment, the connecting member 6 is specifically a bracket with a connecting flange, and is formed by welding the connecting flange and channel steel, correspondingly, the anchoring member 5 is a connecting flange fixedly arranged on the substrate 2 by using an anchoring rib, and the connecting member 6 and the anchoring member 5 are fixedly connected together by a fastening member 11; in addition, the backpressure elastic element 7 in the backpressure device comprises a plurality of compression type spiral steel springs, one end of the backpressure elastic element 7 acts on the track plate 1, the other end of the backpressure elastic element acts on the connecting piece 6, and the connecting piece 6 is connected with the substrate 2 through the anchoring piece 5, wherein in order to ensure that the stress of the spiral steel springs is uniform, a pressure equalizing plate 9 is further arranged in the backpressure device, the pressure equalizing plate 9 is arranged at the end part of the backpressure elastic element 7, and the connecting piece 6 is matched with the pressure equalizing plate 9 to tightly press the backpressure elastic element 7 on the track plate 1; in addition, in the counter pressure device of this example, a damping element 10 is further provided between the pressure equalizing plates 9 in parallel with the counter pressure elastic element 7, and the damping element 10 is specifically a small hole throttling type damping device. In order to ensure that the counter-pressure elastic element 7 does not move in the using process, a limiting ring (conventional structure, not specifically shown in the figure) for positioning the counter-pressure elastic element 7 is arranged on the pressure equalizing plate 9, and the pressure equalizing plate 9 and the connecting piece 6 are welded and fixed together after the installation is finished.
Compared with the first embodiment, the slab ballastless track bed with the back-pressure device in the embodiment can not only utilize the back-pressure device to provide continuous back-pressure pretightening force between the track slab 1 and the underfloor filling layer 3, but also ensure that the track slab 1 and the underfloor filling layer 3 are always in a close contact state, can effectively avoid the stripping between the track slab 1 and the underfloor filling layer 3, and can not suspend even if the stripping occurs, thereby effectively improving the integrity and the safety of a track bed system. In addition, the damping element 10 is additionally arranged in the counter-pressure device, so that the system damping of the plate-type ballastless track bed with the counter-pressure device can be effectively increased, the dynamic impact in the operation process of the rail vehicle can be better buffered, the vibration energy can be quickly attenuated, the vibration attenuation and noise reduction effects can be obviously improved, the comfort and the safety in the operation process of the rail vehicle can be favorably improved, and the service life of the track bed system can be prolonged.
Based on the technical principle of the embodiment, the compression spring in the elastic counter-pressure element 7 can be a metal coil spring, a polyurethane elastic block, a rubber elastic block, a metal disc spring, a rubber-plastic metal composite spring or other types of compression springs made of other materials besides the mentioned steel coil spring, and can be selected according to actual needs when in use, wherein the rubber-plastic metal composite spring can be a composite spring formed by high polymer materials such as elastic rubber, elastic polyurethane, elastic plastic and the like and metal; in addition, the damping element 10 included in the pressure reversing device can be a viscous damping device, an eddy current damping device, a magnetorheological damping device, a viscoelastic damping device and other specific forms besides the mentioned small-hole throttling type damping device, and can be applied to the invention as long as the system damping can be effectively improved and the purpose of fast consuming vibration energy is realized. The technical solutions above are all simple changes based on the technical principle of the present invention, and are only described herein by words, and all fall within the scope of the claims of the present invention. The above description is also applicable to other embodiments of the present invention, and is hereby incorporated by reference.
It is particularly noted that, in order to ensure that the track slab 1 and the underfilling layer 3 are always in close contact, in general, the pre-compression stroke of the compression spring in the counter-pressure device of the present invention should be greater than 110% of the maximum downward deformation of the track slab 1 in the working state, wherein the maximum downward deformation of the track slab 1 also includes thermal expansion and cold contraction deformation of the slab body of the track slab 1. The above description is equally applicable to other embodiments of the present invention, and all such descriptions are intended to be included within the scope of the invention as claimed.
Example three:
as shown in fig. 4, the slab ballastless track bed with the back pressure device is different from the second embodiment in that a boss 12 is provided on the track slab 1; in the counter-pressure device, the counter-pressure elastic element 7 is composed of a single compression type spiral steel spring, one end of the counter-pressure elastic element 7 acts on the track plate 1, the other end of the counter-pressure elastic element acts on the connecting piece 6, and the connecting piece 6 is connected with the substrate 2 through the anchoring piece 5; the underfloor filling layer 3 is formed of an elastic damping pad made of an elastic urethane material, and the underfloor filling layer 3 and the track plate 1 are not bonded to each other.
Compared with the embodiment, the technical scheme of the embodiment has the advantages that the boss 12 is arranged on the track plate 1, the back pressure device is arranged at the boss 12, the limit space on the periphery of the track structure 8 is not occupied, the structure is more compact, the limit space of the track is not influenced, and the maintenance and the overhaul of the track in the later period are facilitated; in addition, in the embodiment, the support with the connecting flange of the connecting piece 6 is used as a limiting device to limit the track slab 1 transversely, and a limiting structure 4 is not required to be arranged additionally, so that the whole track bed system is simpler in structure, convenient to construct and beneficial to reducing the construction cost; in addition, in this example, since the elastic vibration-damping pad is used as the underfloor filling layer 3, the vibration-damping performance of the system is further excellent, and the vibration noise level during operation can be significantly reduced. It should be particularly noted that, based on the technical principle of this example, it can be seen that, in the slab ballastless track bed with the back-pressure device of the present invention, the back-pressure pre-tightening force is provided by the back-pressure device to ensure that the track slab 1 and the underfloor packing layer 3 are always in a close contact state, and the adhesion with the track slab 1 is not dependent on the viscosity of the underfloor packing layer 3, so that the underfloor packing layer 3 and the track slab 1 can be arranged without adhesion, which greatly facilitates the later maintenance and replacement of the underfloor packing layer 3 or the track slab 1; in addition, because the underfloor filling layer 3 and the track slab 1 can be arranged without bonding, the range of material selection of the underfloor filling layer 3 is wider, for example, in this example, the underfloor filling layer 3 is composed of an elastic damping pad, and the material selection range is expanded, which brings advantages that: (1) the vibration reduction performance can be better considered, and the vibration reduction and noise reduction level of the system is improved; (2) the variety of the selected materials is beneficial to reducing the construction cost and the construction difficulty; (3) the breadth of China is vast, the climate change is various, and the expansion of the material selection range is more favorable for improving the applicability of the plate-type ballastless track bed with the back pressure device; (4) great convenience is provided for later maintenance. Based on the technical principle of the present example, the underfloor filling layer 3 may also be made of other types of elastic damping pads, such as rubber damping pads; further, as a specific example, as shown in fig. 5, the underfloor filling layer 3 may be further constituted by an elastic vibration damping block provided locally; of course, the underfloor filling layer 3 may be made of other materials such as high-elasticity mortar, which can achieve a good effect, and it should be noted that, when a material such as high-elasticity mortar is used, in order to achieve non-adhesion between the underfloor filling layer 3 and the track plate 1, an isolation film or the like may be provided between the underfloor filling layer 3 and the track plate 1, which is only described by characters herein, and is not shown in any drawing, which is within the protection scope of the present invention.
Example four:
as shown in fig. 6, the slab ballastless track bed with the back pressure device of the present invention is different from the second embodiment in that the underfloor filling layer 3 disposed between the track slab 1 and the base 2 is made of a self-compacting concrete material; a limiting structure 4 is further arranged between the track slab 1 and the substrate 2, and the limiting structure 4 is specifically a local bulge of the slab lower filling layer 3 embedded in the substrate 2; in addition, the track plate 1 is provided with a mounting channel 13, the substrate 2 is fixedly provided with an anchoring piece 5 corresponding to the mounting channel 13, and the connecting piece 6 penetrates through the mounting channel 13 to be assembled and connected with the anchoring piece 5 fixedly arranged on the substrate 2. The connecting piece 6 is a screw rod, and the anchoring piece 5 is provided with a threaded hole matched with the screw rod in mounting; in addition, the back pressure elastic element 7 in the back pressure device is a rubber elastic block, and two ends of the rubber elastic block are also provided with pressure equalizing plates 9.
Compared with the embodiment, in the technical scheme of the embodiment, although the damping element 10 is not additionally arranged in the back pressure device, the rubber elastic block serving as the back pressure elastic element 7 has good elasticity and damping characteristics, so that the effect of improving the damping of the track bed structure system can be achieved, the good vibration and noise reduction performance is achieved, and the structure is simpler. Of course, the technical solution described in this embodiment also has other advantages of the second embodiment, and will not be repeated here. It is noted that the counter-pressure device in this example is fitted between the track plate 1 and the base 2 via the installation channel 13, which is suitable not only for the construction of new high-speed lines, but also for the retrofitting of existing high-speed lines. The method is very convenient only by drilling a hole on the track plate of the existing high-speed rail as a mounting channel 13, fixing the anchoring piece 5 in the substrate 2 and then mounting the back pressure device.
Based on the technical principle of this example, the backpressure elastic element 7 of the present invention may be an elastic block made of other polymer materials besides rubber, such as elastic blocks made of high polymer materials like elastic polyurethane and elastic plastic, and of course, a composite spring made of the above polymer materials and metal; in addition, the connecting piece 6 can be a screw rod, or a connecting rod with an external thread arranged at the partial front end part, and the same technical effects can be realized, and the connecting piece is based on simple change of the technical principle of the invention and is also in the protection scope of the invention. In addition, based on the technical principle of this embodiment, the connecting rod and the anchoring member 5 may be connected to each other through a threaded structure, or may be connected to each other through a hooking structure, for example, the connecting rod provided with the hooking block is used to cooperate with the anchoring member 5 provided with the pre-buried channel, so as to hook the hooking block in the pre-buried channel, so that a good technical effect may be achieved.
Example five:
as shown in fig. 7, the plate-type ballastless track bed with the back pressure device is different from the fourth embodiment in that bosses 12 are arranged on both sides of the track plate 1, and the back pressure device is installed at the bosses 12; in the back pressure device, an anchoring piece 5 is a foundation bolt, a connecting piece 6 is a connecting rod with a sleeve structure with internal threads, a back pressure elastic element 7 is formed by connecting a plurality of disc springs in series, and pressure equalizing plates 9 are arranged at two ends of the back pressure elastic element.
Compared with the fourth embodiment, in the technical scheme of the embodiment, the back pressure device is arranged at the boss 12, so that the limit space of the periphery of the track structure 8 is not occupied, the limit space of the track is not influenced, and the maintenance and overhaul of the track at the later stage are facilitated; in addition, due to the arrangement of the boss 12, the boss is thinner in thickness, the installation channel 13 required for installing the connecting piece 6 is easier to process, once the connecting piece 6 and the anchoring piece 5 at a certain position are failed to be connected and cannot be repaired, a hole can be drilled nearby again to serve as a new installation channel 13, then the foundation bolt is installed and fixed on the base 2 again through the installation channel 13, then the connecting piece, the back pressure elastic element 7 and other elements are installed, and the assembly of the back pressure device is completed, so that the assembly is very convenient.
Example six:
as shown in fig. 8 and fig. 9, the difference between the slab ballastless track bed with the back pressure device and the fifth embodiment of the invention is that the track slab 1 is provided with a local groove 14; in addition, in the counter-pressure device, the counter-pressure elastic element 7 is a metal rubber composite spring, the counter-pressure elastic element 7 is arranged in the local groove 14, the lower part of the anchoring member 5 is fixed in the base 2, the upper part of the anchoring member is a stud which passes through a mounting channel 13 arranged on the track slab 1 corresponding to the local groove 14 and is matched with the connecting member 6 to press the counter-pressure elastic element 7 on the track slab 1, and the connecting member 6 is a nut.
Compared with the fifth embodiment, the technical scheme of the embodiment has the advantages that the assembly of the connecting piece 6 and the anchoring piece 5 is completed above the back-pressure elastic element 7, so that the operation is simpler and quicker; in addition, the metal rubber composite spring serving as the backpressure elastic element 7 has good elasticity and good damping characteristics, so that system damping of the ballast bed structure can be effectively improved, dynamic impact in the operation process of the rail vehicle can be buffered better, vibration energy is attenuated rapidly, vibration damping and noise reduction effects are remarkably improved, the improvement on comfort and safety in the operation process of the rail vehicle is facilitated, and the service life of the ballast bed system is prolonged.
In conclusion, the slab ballastless track bed with the back pressure device provided by the invention has the advantages that the back pressure device is additionally arranged in the track bed system, the back pressure pretightening force provided by the back pressure device is utilized to ensure that the track slab 1 and the underfloor filling layer 3 are always in a close contact state, the stripping between the track slab 1 and the underfloor filling layer 3 can be effectively avoided, the stripping can not be suspended, and the integrity and the safety of the track bed system can be effectively improved.
In addition, the back pressure elastic element 7 arranged in the back pressure device can adopt elements with good damping performance such as a rubber elastic block, a polyurethane elastic block or a rubber metal composite spring, and the like, and the back pressure device can also be independently provided with the damping element 10, so that after the back pressure device with the damping structure is additionally arranged, the system damping of the plate-type ballast ballastless track bed with the back pressure device can be effectively increased, the dynamic impact in the operation process of a railway vehicle can be better buffered, the vibration energy can be quickly attenuated, the vibration damping and noise reduction effects can be obviously improved, the comfort and the safety in the operation process of the railway vehicle can be favorably improved, and the service life of the track bed system can be prolonged. In addition, due to the fact that the back pressure device is additionally arranged, the lower filling layer 3 of the slab ballastless track bed with the back pressure device can be arranged in a non-bonding mode with the track slab 1, later-stage maintenance and replacement are facilitated, the material selection range of the lower filling layer 3 of the slab ballastless track bed with the back pressure device is wider, and the applicability and the practicability of the slab ballastless track bed with the back pressure device are greatly improved. The plate-type ballastless track bed with the back pressure device has the advantages of simple structure, low vibration and noise level, good vibration and noise reduction performance and long service life, can be widely applied to various ballastless track lines of high-speed railways, and has wide market application prospect.
In addition, the embodiments of the present invention are mainly used for facilitating understanding of the technical principles of the present invention, and are not limited to the contents described in the embodiments, and the technical contents described in the embodiments may also be used interchangeably.
Claims (10)
1. A slab ballastless track bed with a back pressure device comprises a base (2), a track slab (1) is arranged above the base (2), a slab lower filling layer (3) is arranged between the track slab (1) and the base (2), and a limiting structure (4) is arranged between the track slab (1) and the base (2), and is characterized by further comprising the back pressure device which comprises a back pressure elastic element (7), a connecting piece (6) and an anchoring piece (5); the track slab is characterized in that a mounting channel (13) is arranged on the track slab (1), a back-pressure elastic element (7) is arranged above the track slab (1) corresponding to the mounting channel (13), an anchoring piece (5) is fixedly arranged on the base (2) corresponding to the mounting channel (13), and the connecting piece (6) is assembled and connected with the anchoring piece (5) through the mounting channel (13) to compress the back-pressure elastic element (7) on the track slab (1).
2. The slab ballastless track bed with the back-pressure device according to claim 1, wherein the back-pressure elastic member (7) comprises a coil steel spring, a disc spring, an elastic block made of a polymer material or a composite spring made of a polymer material and a metal.
3. The slab ballastless track bed with the back-pressure device according to claim 1, wherein the back-pressure device further comprises a pressure equalizing plate (9), the back-pressure elastic element (7) is a compression spring, the pressure equalizing plate (9) is disposed at an end of the back-pressure elastic element (7), and the connecting member (6) cooperates with the pressure equalizing plate (9) to provide a pre-tightening force to press the back-pressure elastic element (7) on the track slab (1).
4. The ballastless track bed with back-pressure device of claim 3, wherein the pre-compression stroke of the compression spring in the back-pressure device is larger than 110% of the maximum downward deformation of the track slab (1) in the working state.
5. The slab ballastless track bed with the back-pressure device according to claim 3, characterized in that the back-pressure device further comprises a damping member (10), and the damping member (10) is disposed between the pressure equalizing plates (9) at both ends of the back-pressure elastic member (7).
6. The slab ballastless track bed with backpressure means according to claim 5, characterized in that the damping element (10) is a orifice-throttling damping device, a viscous damping device, an eddy current damping device, a magnetorheological damping device or a viscoelastic damping device.
7. The slab ballastless track bed with backpressure devices according to any of claims 1-6, characterized in that the connecting piece (6) is a nut, a connecting rod provided with a hitching block, or a connecting rod provided with internal or external threads.
8. The slab ballastless track bed with the back pressure device according to claim 1, wherein the anchoring member (5) is provided with a threaded hole, a stud or a pre-buried channel for assembling and connecting with the connecting member (6).
9. The slab ballastless track bed with backpressure means according to claim 1, characterized in that the underfloor filling layer (3) is composed of highly elastic mortar, elastic vibration-damping pads or elastic vibration-damping blocks.
10. The slab ballastless track bed with backpressure means according to claim 1, characterized in that the underfloor packing (3) and the track slab (1) are arranged without adhesion to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910221316.6A CN109853301B (en) | 2016-12-30 | 2016-12-30 | Plate-type ballastless track bed with back pressure device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910221316.6A CN109853301B (en) | 2016-12-30 | 2016-12-30 | Plate-type ballastless track bed with back pressure device |
| CN201611252811.6A CN106758553B (en) | 2016-12-30 | 2016-12-30 | Plate-type ballastless railway roadbed with backpressure device |
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| CN201611252811.6A Division CN106758553B (en) | 2016-12-30 | 2016-12-30 | Plate-type ballastless railway roadbed with backpressure device |
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| CN109853301A CN109853301A (en) | 2019-06-07 |
| CN109853301B true CN109853301B (en) | 2021-02-23 |
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| CN201910221137.2A Active CN109898370B (en) | 2016-12-30 | 2016-12-30 | Plate-type ballastless track bed with back pressure device |
| CN201611252811.6A Active CN106758553B (en) | 2016-12-30 | 2016-12-30 | Plate-type ballastless railway roadbed with backpressure device |
| CN201910221316.6A Active CN109853301B (en) | 2016-12-30 | 2016-12-30 | Plate-type ballastless track bed with back pressure device |
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| CN201611252811.6A Active CN106758553B (en) | 2016-12-30 | 2016-12-30 | Plate-type ballastless railway roadbed with backpressure device |
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| CN107190584B (en) * | 2017-07-10 | 2023-03-10 | 中铁第四勘察设计院集团有限公司 | Assembled limiting structure for ballastless track and ballastless track with same |
| CN107829338A (en) * | 2017-11-23 | 2018-03-23 | 中铁第四勘察设计院集团有限公司 | It is a kind of be used to non-fragment orbit is installed withhold anchor bolt and installation method |
| CN108360305A (en) * | 2018-04-27 | 2018-08-03 | 江苏振华轨道交通设备有限公司 | A kind of rail traffic vibration damping installation apparatus and installation method |
| CN113136746B (en) * | 2020-01-17 | 2023-04-25 | 深圳市三奇科技有限公司 | High-damping vibration isolation noise isolation type floating slab track and vibration isolation method |
| CN113550176B (en) * | 2021-07-07 | 2022-09-23 | 高速铁路建造技术国家工程实验室 | External spacing module pin-connected panel track structure |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109898370B (en) | 2021-05-07 |
| CN109898370A (en) | 2019-06-18 |
| CN106758553A (en) | 2017-05-31 |
| CN109853301A (en) | 2019-06-07 |
| CN106758553B (en) | 2019-08-09 |
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