CN111074696A - Assembly type tunnel track unit, assembly type tunnel track and deformation maintenance method thereof - Google Patents
Assembly type tunnel track unit, assembly type tunnel track and deformation maintenance method thereof Download PDFInfo
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- CN111074696A CN111074696A CN202010004560.XA CN202010004560A CN111074696A CN 111074696 A CN111074696 A CN 111074696A CN 202010004560 A CN202010004560 A CN 202010004560A CN 111074696 A CN111074696 A CN 111074696A
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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
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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
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
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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
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
- E01B19/003—Means for reducing the development or propagation of noise
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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
- E01B2/00—General structure of permanent way
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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
- E01B31/00—Working rails, sleepers, baseplates, or the like, in or on the line; Machines, tools, or auxiliary devices specially designed therefor
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- Railway Tracks (AREA)
Abstract
An assembly type tunnel track unit, an assembly type tunnel track and a deformation maintenance method thereof relate to the field of railway tracks. The assembled tunnel track unit comprises at least two blocking platforms, a prefabricated long pillow, a prefabricated track plate, a cast-in-place layer and an elastic vibration damping layer, wherein the cast-in-place layer and the elastic vibration damping layer are arranged between the prefabricated track plate and an inverted arch of a tunnel. At least two blocking platforms are arranged at intervals and form a limiting space for limiting the prefabricated track slab. The upper surface of the prefabricated long sleeper is provided with a rail bearing platform, and the surface of the rail bearing platform is provided with a fastener. The prefabricated track board includes two track board units and connecting piece, and two track board unit clearances are arranged and are formed the mounting groove that holds prefabricated long pillow, and the connecting piece sets up in the clearance department of two track board units and connects two track board units, and every track board unit is equipped with and keeps off the first breach of platform complex, and the elasticity damping layer is filled in the gap of prefabricated long pillow and mounting groove, and it has good damping and falls the function of making an uproar, the deformation adjustment ability, can reduce the construction degree of difficulty and the efficiency of construction height.
Description
Technical Field
The application relates to the field of railway tracks, in particular to an assembly type tunnel track unit, an assembly type tunnel track and a deformation maintenance method of the assembly type tunnel track.
Background
The existing tunnel track mainly comprises a plate-type ballastless track and a prefabricated long sleeper ballastless track. The plate-type ballastless track is suitable for a ballastless track of a train running at a high speed, the construction progress is fast, but the integral rigidity is relatively large, and large noise is easy to generate; compared with a plate-type ballastless track, the prefabricated long-sleeper ballastless track can effectively reduce vibration and noise, but is relatively slow in construction speed.
Therefore, it is necessary to provide a track structure that can reduce vibration and noise and improve construction efficiency.
Disclosure of Invention
The application provides an assembly type tunnel track unit, an assembly type tunnel track and a deformation maintenance method thereof, which aim to alleviate the technical problem.
According to the embodiment of the first aspect of the application, the assembled tunnel track unit comprises at least two blocking platforms, a prefabricated long sleeper, a prefabricated track plate, a cast-in-place layer and an elastic damping layer.
Wherein, at least two keep off the platform interval and set up in the inverted arch both sides in tunnel so as to form spacing space.
The upper surface of the prefabricated long sleeper is provided with at least two rail bearing platforms, and the surface of each rail bearing platform is provided with a fastener.
At least partial prefabricated track board is located spacing space, and prefabricated track board includes: two track board units and connecting piece, the inboard of every track board unit is equipped with the step groove, and two track board unit clearances are arranged to make two step grooves relative and inject the mounting groove that is used for holding prefabricated long pillow jointly, the clearance department of two track board units sets up connecting piece and connects two track board units, and the outside of every track board unit is equipped with and keeps off the first breach of platform cooperation and one-to-one.
The cast-in-place layer is used for being arranged between the prefabricated track slab and an inverted arch of the tunnel.
The elastic vibration damping layer is filled in the gap between the prefabricated long pillow and the mounting groove.
According to the assembled tunnel track unit of this application embodiment, simple structure construction convenience adopts the setting of prefabricated long pillow, prefabricated track board, effectively guarantees the component quality, not only effectively shortens the engineering time, improves the efficiency of construction, still is convenient for change, is convenient for follow-up the maintaining. The specific arrangement mode of the track slab unit and the connecting piece can reduce the dead weight of the prefabricated track slab so as to improve the laying efficiency. The elastic vibration damping layer filled in the gap between the prefabricated long sleeper and the mounting groove is adopted, so that the assembled tunnel track unit has a good vibration damping and noise reduction function and also has certain deformation adjustment capacity.
In addition, the assembled tunnel track unit according to the embodiment of the present application has the following additional technical features:
in some embodiments shown in this application, in combination with the first aspect, the outer side of the cast-in-place layer has second notches that are matched with the blocking platforms and correspond to each other one by one, and the fabricated tunnel track unit further includes a buffer layer, and the buffer layer is filled in a gap between the blocking platform and the cast-in-place layer, and/or the buffer layer is filled in a gap between the blocking platform and the prefabricated track slab.
Through the setting of above-mentioned buffer layer, in the actual work progress of being convenient for on the one hand, keep off the platform and inlay in the first breach of locating prefabricated track board and the second breach on cast-in-place layer, improve the efficiency of construction, on the other hand prevents prefabricated track board and keeps off a rigid contact to and prevent cast-in-place layer and keep off a rigid contact, improve assembled tunnel track unit's stability and durability when effective damping.
Meanwhile, most of mountain railway lines pass through tunnels with complex geological conditions, the geological conditions are complex, the surrounding rock level of the tunnels frequently changes, and more weak and broken surrounding rock zones exist, and particularly in the active fracture zone, the deformation of the foundation at the lower part of the track is not easy to control. When the fastener can not be adjusted, the conventional method is ballast bed adjustment and tunnel inverted arch adjustment (arch change), the difficulty of regulation is very high, the investment cost is high, the normal operation of opening a line is seriously influenced, the operation safety is greatly threatened, and the improvement is urgently needed.
Thus, in combination with the first aspect, in some embodiments illustrated herein, the fabricated tunnel rail unit further comprises an under-sleeper pad provided between the bottom wall of the prefabricated long sleeper and the resilient damping layer.
Through the setting of pillow lower bolster, be convenient for in the in-service use process, when the whole track bed of track was gone up to encircle/sink, can adopt the setting mode of changing, getting rid of or increasing pillow lower bolster, solve the problem of the big deformation of tunnel basis, compare in the mode operation of track bed adjustment and tunnel invert adjustment more convenient and fast simultaneously.
In connection with the first aspect, the present application illustrates some embodiments wherein the height of the rail bearing platform is greater than 30mm, in particular the height of the rail bearing platform is 35-80 mm.
By increasing the height of the rail bearing platform (the height of the existing rail bearing platform is generally 30mm), when the tunnel foundation deformation is the upward arch deformation, the surface of the rail bearing platform is ground to reach the target height according to the actual requirement, so as to solve the problem of upward arch deformation.
In combination with the first aspect, the present application shows some embodiments, the track slab unit is provided with a first notch on the outer side, and the track slab unit is symmetrically arranged along the first notch.
Under the above-mentioned condition, effectively guarantee the stability of prefabricated track board, the while is convenient for processing preparation and installation, improves the installation effectiveness.
In connection with the first aspect, the present application illustrates some embodiments wherein the connector is a hollow steel tube.
Through the arrangement, the dead weight of the prefabricated track slab is effectively reduced, and the prefabricated track slab is convenient to mount and dismount.
The assembled tunnel track according to the embodiment of the second aspect of the present application comprises a plurality of assembled tunnel track units provided according to the embodiment of the first aspect of the present application, the assembled tunnel track units are distributed at intervals along the extending direction of the tunnel, and the steel rail is fixed to the rail bearing platform through fasteners.
According to the fabricated tunnel track of the embodiment of the application, the fabricated tunnel track unit is utilized, the structure is simple, the construction efficiency is high, the good vibration and noise reduction function is realized, and a certain deformation adjustment capacity is realized.
According to the third aspect of the present application, there is provided a method for deforming and repairing the assembled tunnel rail according to the second aspect of the present application, which includes:
when the deformation is the upward arch deformation, the maintenance method comprises the following steps:
s1, adjusting by using a fastener.
S2, when the height of the fastener is not enough to offset deformation, the upper surface of the rail bearing platform is polished, and the height of the rail bearing platform is reduced.
Through the mode of polishing of above-mentioned fastener and support rail platform surface, effective adjustment is gone up to encircle and is out of shape, and convenient operation is swift simultaneously, and the degree of difficulty coefficient is low, effectively reduces cost of maintenance, reduces the influence to the normal operation of circuit simultaneously.
In combination with the third aspect, in some embodiments illustrated herein, when the fabricated tunnel rail is provided with an under-sleeper pad, the step S3 is performed when none of the adjustment amounts of the step S2 is sufficient to offset the deformation, and the step S3 includes: the rails are cut and removed, the prefabricated sleepers are removed, and the thinner sleeper lower bearing plates are replaced or removed.
When the deformation of the upper arch cannot be regulated and controlled in the steps S1 and S2, the thinner under-pillow base plate is replaced or removed, and meanwhile, since the components in the assembly type tunnel track unit can be disassembled, the construction difficulty is effectively reduced, and the adjustment efficiency is improved.
Further, when the deformation is sinking deformation, the maintenance method comprises the following steps:
s1, adjusting by using a fastener;
and S2, when the height of the fastener is not increased enough to offset deformation, cutting and removing the steel rail, taking out the prefabricated long sleeper, and replacing a thicker sleeper lower base plate.
Through the cooperation of fastener and sleeper backing plate, effectively reduce the construction degree of difficulty of sinking deformation adjustment, improve the efficiency of adjustment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of an assembled tunnel track body according to the present application;
fig. 2 is a schematic structural view of a first perspective of the fabricated tunnel track unit of the present application;
FIG. 3 is a schematic view of the cross-sectional structure taken along the line A-A in FIG. 2;
fig. 4 is a schematic sectional view of the prefabricated track slab along the direction a-a in fig. 2;
FIG. 5 is a schematic view of structural connection between a cast-in-place layer and a prefabricated track slab;
fig. 6 is a structural diagram of a second perspective view of the fabricated tunnel track unit.
Icon: 10-an assembled tunnel track body; 100-fabricated tunnel track unit; 110-a baffle table; 120-prefabricating a track slab; 121-a track plate unit; 123-step groove; 125-first gap; 127-a mounting groove; 129-connecting piece; 130-cast-in-place layer; 140-prefabricating the long pillow; 141-rail bearing table; 150-an elastomeric damping layer; 160-a buffer layer; 170-pillow lower cushion.
Detailed Description
Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
It should be noted that the terms "first," "second," and the like are used merely to distinguish one description from another, and are not intended to indicate or imply relative importance.
It should be noted that the application scenarios of the assembled tunnel track unit and the assembled tunnel track provided by the present application are not limited to the field of tunnel tracks, but may also be used in outdoor non-tunnel track scenarios such as bridges, plains, and the like. It is defined as a tunnel track because of its optimum durability within the tunnel.
Examples
Referring to fig. 1, the present embodiment provides an assembled tunnel track (not shown) including an assembled tunnel track body 10 and a steel rail (not shown).
The assembled tunnel track body 10 includes a plurality of assembled tunnel track units 100, for example, two, five, ten, fifty, etc., which can be set by those skilled in the art according to actual requirements and will not be described herein.
Referring to fig. 2 and 3, the fabricated tunnel track unit 100 mainly includes a blocking platform 110, a prefabricated long sleeper 140, a prefabricated track slab 120, a cast-in-place layer 130, and an elastic damping layer 150.
Specifically, the number of the blocking stages 110 is at least two, for example, two, three, four, etc., and the at least two blocking stages 110 (i.e., all blocking stages 110) are arranged at both sides of the inverted arch of the tunnel at intervals to form a limiting space for defining the precast track slab 120. In other words, all the blocks 110 are arranged at intervals in the lateral direction of the tunnel on both sides of the inverted arch of the tunnel to form two block groups, each of which has at least one block 110 arranged in the longitudinal direction of the tunnel, for example, each of the block groups has at least two blocks 110 arranged at intervals in the longitudinal direction of the tunnel. Optionally, the inverted arch of the tunnel is a corresponding plane at the inverted arch of the tunnel.
Alternatively, the number of the stages 110 is an even number, and the even number of stages 110 are symmetrically arranged along the axis of the tunnel.
In this embodiment, the number of the blocking platforms 110 is two, the two blocking platforms 110 are symmetrically arranged at intervals along the axis of the tunnel, and a limiting space is formed between the two blocking platforms 110.
In this embodiment, the retaining platform 110 is made of concrete, and during concrete construction, according to the design drawing and the inverted arch and the retaining platform 110 of the measurement positioning construction tunnel, the retaining platform 110 is arranged on the inverted arch of the tunnel in a pre-pouring manner, so that the retaining platform 110 is stably fixed on the inverted arch of the tunnel, and the construction efficiency is improved.
The prefabricated track plate 120 can be directly prefabricated in batches, the quality of the prefabricated track plate 120 can be guaranteed, the quality of the assembled tunnel track is guaranteed, the construction time is effectively shortened, the construction efficiency is improved, replacement is convenient, and follow-up maintenance is convenient.
Specifically, at least a portion of the pre-fabricated track slab 120 is located in the spacing space.
Referring to fig. 2, 3, 4 and 5, the prefabricated track slab 120 includes: two track plate units 121 and a connecting member 129.
Each track plate unit 121 is provided with a step groove 123 and first notches 125 which are matched with the blocking platforms 110 and correspond to each other one by one.
Each rail plate unit 121 has opposite inner and outer sides, and a stepped groove 123 is provided at the inner side of each rail plate unit 121. The two track plate units 121 are arranged in a gap and opposite manner along the transverse direction of the tunnel (i.e. the direction of a connecting line on two sides of the inverted arch of the tunnel), so that the two step grooves 123 of the two track plate units 121 are opposite and jointly define a mounting groove 127 for accommodating the prefabricated sleeper 140. Specifically, the step groove 123 penetrates through an inner side wall and an upper wall (an upper side is a side far from an inverted arch of the tunnel) of each track plate unit 121, and the two step grooves 123 are engaged with each other to form the mounting groove 127 when the two step grooves 123 are oppositely disposed. Meanwhile, the two rail plate units 121 are arranged along a lateral gap of the tunnel, that is, a gap is formed between inner sidewalls of the two rail plate units 121 in a lateral direction of the tunnel.
The first notch 125 is used to cooperate with the blocking platform 110, the first notch 125 is disposed at the outer side of each track slab unit 121, and the blocking platform 110 is embedded in the corresponding first notch 125 to limit the prefabricated track slab 120 to move in the transverse and longitudinal directions of the tunnel. The first notches 125 are disposed on the outer side wall of the track slab unit 121 and penetrate through the upper wall and the bottom wall of the track slab unit 121, and the first notches 125 correspond to the blocking platforms 110 one to one.
In this embodiment, each track plate unit 121 has a first notch 125, and the track plate units 121 are symmetrically arranged along the first notch 125 to ensure the stability of the assembly track.
In each track slab unit 121, the number of the step grooves 123 may be one or more, and when the number of the step grooves 123 is two, specifically, for example, two, three, five, etc., each step groove 123 extends along the transverse direction of the tunnel, and the step grooves 123 are distributed at intervals along the extending direction of the tunnel, and the specific number may be set by a person skilled in the art according to specific requirements, and is not described herein again.
The connecting member 129 is disposed at a gap between the two rail plate units 121, and the connecting member 129 connects the two rail plate units 121, so that the two rail plate units 121 form a whole, thereby ensuring convenience of installation and stability of the rail.
When the number of the step grooves 123 is plural, the connection member 129 may be located between adjacent two step grooves 123.
Wherein, the connecting piece 129 can be a solid steel pipe, also can be a hollow steel pipe, and in this embodiment, the connecting piece 129 is a hollow steel pipe, effectively alleviates the dead weight of prefabricated track board 120, convenient to install and dismantle. The connecting member 129 is formed by directly embedding both ends of the connecting member in concrete during casting, for example, so that the stability of connection is ensured. In the actual assembling and disassembling process, a mechanical arm or the like can be used to connect the connecting member 129 so as to hoist the prefabricated track slab 120 to the designed height.
Cast-in-place layer 130 is mainly the concrete, and its mode that adopts to pour sets up between the inverted arch in prefabricated track board 120 and tunnel, has bonding fixed action concurrently as the height adjustment layer, guarantees assembled tunnel track's stability. In an actual construction process, the prefabricated track slab 120 is lifted to a preset height, and the prefabricated track slab 120 is directly poured between the inverted arch of the tunnel.
The projection shape of the cast-in-place layer 130 on the horizontal plane may be the same as the projection shape of the prefabricated track slab 120 on the horizontal plane. That is, the cast-in-place layer 130 also needs to partially enclose the block 110. That is, the cast-in-place layer 130 has second notches (not shown) on the outer side thereof, which are matched with the blocking platforms 110 and correspond to one another.
The prefabricated long pillow 140 can be directly prefabricated in batches, the quality of the prefabricated long pillow 140 can be guaranteed, the construction time is effectively shortened, the construction efficiency is improved, and subsequent replacement and maintenance are facilitated.
Referring to fig. 2 and 3, at least two rail supporting platforms 141 are disposed on an upper surface (where the upper surface is a side away from an inverted arch of the tunnel) of the prefabricated sleeper 140, and a fastener (not shown) is disposed on a surface of each rail supporting platform 141. The fastener may be a conventional fastener commonly available in the market, and the structure, connection manner and function of the fastener can refer to the related art, which is not described herein again.
The elastic vibration damping layer 150 is used for vibration damping and noise reduction, and the assembled tunnel track unit 100 has a good vibration damping and noise reduction function and certain deformation adjustment capacity through the cooperation of the fastener and the elastic vibration damping layer 150.
Specifically, referring to fig. 2 and 3, the elastic damping layer 150 is filled in the gap between the prefabricated long sleeper 140 and the installation groove 127, so that the prefabricated long sleeper 140 is embedded in the installation groove 127 in the actual construction process, the construction efficiency is improved, the prefabricated long sleeper 140 is prevented from being in rigid contact with the prefabricated track slab 120, the cast-in-place layer 130 is prevented from being in rigid contact with the blocking platform 110, and the stability and durability of the fabricated tunnel track are improved while the vibration is effectively damped.
Optionally, in order to facilitate the detachment and installation, the elastic damping layer 150 is a rubber boot, and in the actual installation process, the rubber boot is wrapped at the position of the prefabricated long pillow 140 and the position of the under-pillow cushion 170 corresponding to the installation groove 127 and then placed in the installation groove 127, so that the installation is convenient and the prefabricated long pillow 140 is stably embedded in the installation groove 127.
The assembled tunnel track unit 100 obtained through the arrangement has the advantages of vibration reduction, noise reduction, high construction efficiency and certain deformation adjustment capacity.
Further, referring to fig. 2 and 6, the fabricated tunnel track unit 100 may further include a buffer layer 160, wherein the buffer layer 160 is filled in a gap between the blocking platform 110 and the cast-in-place layer 130, and/or the buffer layer 160 is filled in a gap between the blocking platform 110 and the prefabricated track slab 120, in this embodiment, the buffer layer 160 is filled in a gap between the blocking platform 110 and the cast-in-place layer 130, and the buffer layer 160 is filled in a gap between the blocking platform 110 and the prefabricated track slab 120. Through the arrangement of the buffer layer 160, on one hand, the stop table 110 is embedded in the first notch 125 of the prefabricated track slab 120 in the actual construction process, so that the construction efficiency is improved, on the other hand, the prefabricated track slab 120 is prevented from being in rigid contact with the stop table 110, the cast-in-place layer 130 is prevented from being in rigid contact with the stop table 110, and the stability and the durability of the assembled tunnel track unit 100 are improved while the buffer layer is effectively buffered.
The buffer layer 160 is, for example, an epoxy resin layer.
Because the mountain railway lines mostly pass through the tunnel with complex geological conditions, the geological conditions are complex, the grade of surrounding rocks of the tunnel frequently changes, and more weak and broken surrounding rock zones exist, particularly in the movable fracture zone, the deformation of the foundation at the lower part of the track is not easy to control, when the fasteners cannot be adjusted, the conventional method is the adjustment of a ballast bed and the adjustment (arch change) of an inverted arch of the tunnel, the difficulty of the adjustment is extremely high, the investment cost is high, the normal operation of opening the line is seriously influenced, the operation safety is greatly threatened, and the improvement is urgently needed.
Therefore, optionally, referring to fig. 3, the fabricated tunnel rail unit 100 further includes an under-pillow pad 170, and the under-pillow pad 170 is padded between the bottom wall of the prefabricated long pillow 140 and the elastic damping layer 150. Through the arrangement of the under-pillow backing plate 170, when the track whole track bed is arched or sunk in the actual use process, the problem of deformation of the tunnel foundation can be solved by replacing the under-pillow backing plate 170 with different thicknesses and removing or adding the under-pillow backing plate 170; and because the elastic damping layer isolates the prefabricated long sleeper 140 and the sleeper lower bolster 170 from the prefabricated track slab 120, the sleeper lower bolster 170 with different thicknesses can be replaced conveniently, and the assembled track unit can be adjusted in height quickly and in a large range.
Further alternatively, the height of the rail bearing platform 141 is greater than 30mm, specifically greater than 30mm, further, the height of the rail bearing platform 141 is 35-80mm, for example, 40mm, 50mm, 60mm, 70mm or 80mm, and the problem of the upper arch deformation is solved by heightening the height of the rail bearing platform 141 (the height of the existing rail bearing platform 141 is generally 30mm), wherein the height of the initial upper surface of the rail bearing platform 141 is H, when the tunnel foundation deformation is the upper arch deformation, grinding the upper surface of the rail bearing platform 141 according to the actual requirement, and reducing the upper surface of the rail bearing platform 141 to the target height H by grinding, wherein H is greater than H. In conclusion, the height of the assembled tunnel track is adjusted through the three-level adjusting system of the fastener, the rail bearing platform 141 and the sleeper lower cushion plate 170, and a large vertical adjusting amount can be realized.
A plurality of the fabricated tunnel rail units 100 are spaced apart in an extending direction of the tunnel to form a fabricated tunnel body. According to actual requirements, the ends of any two adjacent assembled tunnel track units 100 in the extending direction of the tunnel may be aligned or not aligned, and those skilled in the art can set the ends according to actual requirements, which is not limited herein.
The steel rail is an existing steel rail, and the steel rail is fixed to the rail bearing platform 141 through a fastener, which is specifically referred to the related art and will not be described herein.
The present invention also provides a method for maintaining a fabricated tunnel track in a deformed state, which includes:
when the deformation is the upward arch deformation, the maintenance method comprises the following steps:
s1, adjusting by using a fastener.
S2, when the height of the fastener is not increased enough to offset deformation, the upper surface of the rail bearing platform 141 is polished, and the height of the rail bearing platform 141 is reduced.
Through the mode of polishing on above-mentioned fastener and the bearing rail platform 141 surface, effective adjustment is gone up to encircle and is out of shape, and convenient operation is swift simultaneously, and the degree of difficulty coefficient is low, effectively reduces cost of maintenance, reduces the influence to the normal operation of circuit simultaneously.
Further, when the fabricated tunnel rail is provided with the tie plate 170, the step S3 is performed when none of the adjustment amounts of the step S2 is enough to offset the deformation, and the step S3 includes: the rails are cut and removed, the pre-fabricated long sleeper 140 is removed, and the thinner sleeper pad 170 is replaced or the sleeper pad 170 is removed. When the deformation of the upper arch cannot be regulated in the steps S1 and S2, the replacement of a new sleeper pad 170 thinner than the original sleeper pad 170 or the removal of the original sleeper pad 170 is performed, and at the same time, since each component in the assembled tunnel rail unit 100 can be disassembled, the construction difficulty is effectively reduced, and the adjustment efficiency is improved.
Further, when the fabricated tunnel rail does not have the under-sleeper pad 170 and is deformed to a sunken deformation, the maintenance method includes:
s1, adjusting by using a fastener;
s2, when the height of the fastener is not increased enough to offset deformation, cutting and removing the steel rail, taking out the prefabricated long sleeper 140, and adding the sleeper lower base plate 170 with proper thickness. Here, the under-pillow pad 170 having a suitable thickness means the under-pillow pad 170 having a thickness that can counteract the sinking deformation.
Further, when the fabricated tunnel rail is provided with the under-sleeper pad 170 and is deformed to a sunken deformation, the maintenance method includes:
s1, adjusting by using a fastener;
s2, when the height of the fastener is not increased enough to offset deformation, the steel rail is cut and moved away, the prefabricated long sleeper 140 is taken out, and the thicker sleeper lower backing plate 170 is replaced. Through the cooperation of fastener and sleeper backing plate 170, effectively reduce the construction degree of difficulty of sinking deformation adjustment, improve the efficiency of adjustment.
In conclusion, the assembled tunnel track unit and the assembled tunnel track provided by the application have good vibration and noise reduction effects and construction efficiency, have the deformation adjustment capability of quickly adjusting the height of the assembled track unit, are suitable for large deformation sections of long and large tunnel foundations, and have wide application prospects.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An assembled tunnel track unit comprising:
the at least two blocking platforms are arranged on two sides of the inverted arch of the tunnel at intervals to form a limiting space;
the upper surface of the prefabricated long sleeper is provided with at least two rail bearing platforms, and the surface of each rail bearing platform is provided with a fastener;
prefabricated track board, at least part prefabricated track board is located spacing space, prefabricated track board includes: the prefabricated sleeper comprises two track plate units and a connecting piece, wherein a step groove is formed in the inner side of each track plate unit, the two track plate units are arranged in a clearance mode so that the two step grooves are opposite and jointly limit a mounting groove for accommodating the prefabricated sleeper, the connecting piece is arranged in the clearance of the two track plate units and connected with the two track plate units, and first notches which are matched with blocking platforms and correspond to the two track plate units one to one are formed in the outer side of each track plate unit;
the cast-in-place layer is arranged between the prefabricated track slab and an inverted arch of the tunnel; and the number of the first and second groups,
and the elastic vibration reduction layer is filled in the gap between the prefabricated long pillow and the mounting groove.
2. The fabricated tunnel rail unit according to claim 1, wherein second notches which are matched with the blocking platforms and correspond to the blocking platforms in a one-to-one manner are formed in the outer side of the cast-in-place layer, and the fabricated tunnel rail unit further comprises a buffer layer, wherein the buffer layer is filled in gaps between the blocking platforms and the cast-in-place layer, and/or gaps between the blocking platforms and the prefabricated rail plates.
3. The fabricated tunnel rail unit of claim 1, further comprising an under-sleeper pad disposed between the bottom wall of the pre-fabricated long sleeper and the resilient vibration-damping layer.
4. The fabricated tunnel rail unit of claim 1, wherein the height of the rail bearing platform is 35-80 mm.
5. The fabricated tunnel rail unit according to claim 1, wherein the rail plate unit is provided at an outer side thereof with a first notch, and the rail plate units are symmetrically arranged along the first notch.
6. The fabricated tunnel rail unit according to any one of claims 1 to 5, wherein the connection member is a hollow steel pipe.
7. A fabricated tunnel track comprising a plurality of fabricated tunnel track units according to any one of claims 1 to 6 and a steel rail, the plurality of fabricated tunnel track units being spaced apart in an extending direction of a tunnel, the steel rail being fixed to the rail support base via a fastening member.
8. A deformation repair method of the fabricated tunnel rail of claim 7, wherein when the deformation is an upward arch deformation, the repair method comprises:
s1, adjusting by using a fastener;
s2, when the height of the fastener is not enough to offset deformation, the upper surface of the rail bearing platform is polished, and the height of the rail bearing platform is reduced.
9. The repair method of claim 8, wherein when the fabricated tunnel rail is provided with an under-sleeper pad, the step S3 is performed when none of the adjustment amounts of the step S2 is enough to offset the deformation, and the step S3 includes: and cutting and removing the steel rail, taking out the prefabricated long sleeper, and replacing the thinner sleeper lower base plate or removing the sleeper lower base plate.
10. The repair method according to claim 9, wherein when the deformation is a sinking deformation, the repair method comprises:
s1, adjusting by using a fastener;
and S2, when the height of the fastener is not increased enough to offset deformation, cutting and removing the steel rail, taking out the prefabricated long sleeper, and replacing the thicker sleeper lower backing plate.
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