CN108560330B - Secondary pouring type upgradeable general ballast bed and construction method thereof - Google Patents
Secondary pouring type upgradeable general ballast bed and construction method thereof Download PDFInfo
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- CN108560330B CN108560330B CN201810667866.6A CN201810667866A CN108560330B CN 108560330 B CN108560330 B CN 108560330B CN 201810667866 A CN201810667866 A CN 201810667866A CN 108560330 B CN108560330 B CN 108560330B
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- 238000010276 construction Methods 0.000 title claims abstract description 47
- 238000004873 anchoring Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000004570 mortar (masonry) Substances 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 239000011376 self-consolidating concrete Substances 0.000 claims description 12
- 238000007667 floating Methods 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 9
- 238000013016 damping Methods 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 6
- 239000000758 substrate Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 229920001875 Ebonite Polymers 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Railway Tracks (AREA)
- Machines For Laying And Maintaining Railways (AREA)
Abstract
The invention belongs to the field of vibration and noise control of rail transit, and particularly relates to a secondary pouring type upgradeable universal ballast bed and a construction method thereof. The combined track bed plate unit comprises a prefabricated base plate and a prefabricated track bed plate, wherein the prefabricated track bed plate is positioned above the prefabricated base plate, a height adjusting layer is arranged between the prefabricated base plate and the prefabricated track bed plate, and the height adjusting layer, the prefabricated base plate and the prefabricated track bed plate are respectively kept in a detachable state; a horizontal limiting structure is arranged between the prefabricated base plate and the prefabricated track bed plate. The invention also discloses a construction method. The secondary pouring type upgradeable general ballast bed and the construction method thereof have the advantages of high construction speed, upgradeable vibration reduction level and easier guarantee of construction quality.
Description
Technical Field
The invention belongs to the field of vibration and noise control of rail transit, and particularly relates to a plate type rail bed structure capable of conveniently changing vibration reduction level.
Background
In recent years, along with the rapid development of rail transit in China, the rail transit gradually goes into our lives. The rail transit provides quick and safe travel for people, and meanwhile, the generated vibration and noise problems seriously influence the life quality of surrounding residents, so that the safety of surrounding buildings is endangered, and meanwhile, the stability, the safety, the service life and the like of the rail transit are also adversely affected. Therefore, trying to reduce track vibration and noise, perfecting the coordination relation between the track vibration and noise and natural and living environments becomes a key to the sustainable development of track traffic. In practice, it is found that the situation that the original vibration control measures of the rail transit cannot reach the expected criticizing target due to complicated geological conditions, planning changes and the like sometimes happens, but the installation conditions, the external dimensions and the like of the conventional various ballast bed vibration reduction products are quite different, the vibration reduction measures cannot be conveniently upgraded by replacing the vibration reduction products, the vibration reduction levels cannot be changed according to the needs between ballast bed structures with different vibration reduction levels, the reconstruction is huge in cost, the construction period is quite long, the operation is seriously influenced, and the situation that the delay is not solved after the disturbance problem is often caused due to the existence of the difficulties, so that a plurality of environmental protection complaints are caused.
In addition, the existing track bed generally adopts a construction mode of pouring a substrate, pouring a track plate or placing a prefabricated track plate, on one hand, under the condition that the operation space in a tunnel, on a bridge and the like is limited, various building materials are required to be transported for multiple times in stages, and the construction progress is slower; on the other hand, the construction precision is greatly influenced by the personal ability of an on-site operator, the construction quality is not easy to guarantee, and the phenomenon that the construction error exceeds the standard sometimes occurs.
Disclosure of Invention
The invention aims to solve the problems and provide a secondary pouring type upgradeable universal ballast bed which has high construction speed, can upgrade vibration reduction level and can ensure construction quality more easily.
The secondary pouring type upgradeable general track bed is realized by comprising a combined track bed plate unit and a connecting layer, wherein the combined track bed plate unit comprises a prefabricated base plate and a prefabricated track bed plate, the prefabricated track bed plate is positioned above the prefabricated base plate, a height adjusting layer is arranged between the prefabricated base plate and the prefabricated track bed plate, and the height adjusting layer and the prefabricated base plate and the prefabricated track bed plate are respectively kept in a detachable state; a horizontal limiting structure is arranged between the prefabricated base plate and the prefabricated track bed plate, or between the prefabricated base plate and the prefabricated track bed plate and the foundation; the prefabricated base plate is connected with the foundation through a secondarily poured connecting layer, and pouring through holes for secondary pouring are correspondingly formed in the prefabricated base plate and the prefabricated road bed plate.
Preferably, the height adjusting layer is formed by an anti-slip pad.
In order to facilitate the adjustment of the track height, the prefabricated base plate can be further provided with a height adjusting device, and the height adjusting device comprises an adjusting bracket and an adjusting bolt.
The concrete form of the horizontal limiting structure can be various, for example, a limiting boss or a limiting column is fixedly arranged on the basis of the horizontal limiting structure, and correspondingly, the limiting boss or the limiting column can be arranged at two sides of the prefabricated base plate and the prefabricated road bed plate, or limiting channels are respectively arranged on the prefabricated base plate and the prefabricated road bed plate corresponding to the limiting boss or the limiting column; or the horizontal limiting structure comprises a limiting channel which is correspondingly arranged on the prefabricated road bed board, a limiting column is arranged in the limiting channel, and the lower end of the limiting column is connected with a connecting structure which is arranged on the prefabricated base plate. The concrete form of connection structure can be various equally, for example, connection structure includes the fixed anchor threaded connection spare that sets up on the prefabricated baseplate, or the anchor lumen that sets up on the prefabricated baseplate, or the fixed anchor channel that sets up on the prefabricated baseplate, or the cross section shape is the escape canal of big-end-up structure, and correspondingly, spacing post lower extreme and anchor threaded connection spare are fixed to be linked to each other, or spacing post inserts and establishes in the anchor lumen, or spacing post lower extreme sets up the link piece and links to each other with anchor channel or escape canal link, etc..
Preferably, the connection layer is composed of self-leveling mortar or self-compacting concrete.
For convenient transportation and placement, the length of the prefabricated base plate is preferably the same as that of the prefabricated road bed plate. In addition, in order to be convenient for upgrade the damping level of railway roadbed, can set up the lifting interface on prefabricated railway roadbed board, the lifting interface includes anchor lifting connecting piece or the lifting recess that sets up on the prefabricated railway roadbed board.
The second object of the invention is to provide a construction method of the secondary pouring type upgradeable general ballast bed, which comprises the following steps:
(1) Scribing on the basis;
(2) Assembling and placing the prefabricated base plate, the height adjusting layer and the prefabricated ballast bed plate together to form a combined ballast bed plate unit, and then sequentially and integrally hoisting and transporting the combined ballast bed plate unit to a designated position on a foundation;
(3) The combined ballast bed plate units are limited at least in the transverse direction of the steel rail by utilizing a horizontal limiting structure;
(4) Lifting the combined ballast bed plate unit to the designed height of the track;
(5) Pouring self-compacting concrete or self-leveling mortar between the prefabricated base plate and the foundation through pouring through holes arranged on the prefabricated base plate and the prefabricated road bed plate to form a connecting layer;
(6) And curing the self-compacting concrete or self-leveling mortar of the connecting layer until the design strength is reached, thereby forming the secondary pouring type upgradeable universal ballast bed.
When the vibration reduction level is required to be upgraded, firstly lifting the prefabricated road bed board, removing the original height adjusting layer, and rearranging the prefabricated road bed board by using an elastic vibration reduction pad with proper thickness as a new height adjusting layer to finish the upgrade from the secondary pouring type upgradeable universal road bed to the elastic pad floating road bed; when necessary, the horizontal limiting structure between the prefabricated base plate and the prefabricated track bed plate can be removed, the prefabricated track bed plate is lifted, the original height adjusting layer is removed, the prefabricated track bed plate is replaced by an elastic vibration reduction pad with proper thickness as a new height adjusting layer, the horizontal limiting structure is installed, and the secondary pouring type upgradeable general track bed is completed to the floating track bed with the elastic pad.
The secondary pouring type upgradeable universal ballast bed adopts the combined ballast bed plate units, and compared with the track ballast bed with the traditional structure, the secondary pouring type upgradeable universal ballast bed has the following beneficial technical effects: (1) In the construction process of the secondary pouring type upgradeable general track bed, only the connecting layer needs to be poured on site, so that the workload of on-site pouring and maintenance is greatly reduced, the defects of multiple construction procedures, multiple waiting time and long construction period of the traditional track bed that the substrate needs to be poured first and then the track bed is poured are overcome, the on-site workload is small, the maintenance period is short, and the construction speed is further greatly improved; (2) Because the substrate and the main body of the track bed adopt the prefabricated substrate plate and the prefabricated track bed plate produced by prefabricating the ground respectively, the influence of the operation level of site constructors is small, and the dimensional accuracy and the engineering quality are more ensured; (3) The combined track bed plate unit formed by the prefabricated base plate, the height adjusting layer and the prefabricated track bed plate can be paved in place at one time, so that the construction process is greatly reduced, the construction speed is further improved, and the construction period is shortened; (4) In the invention, the separable height adjusting layer is preset between the prefabricated base plate and the prefabricated track bed plate, and when vibration exceeds standard, the elastic vibration damping material layer can be used for replacing the original height adjusting layer at any time, so that the common track bed is transformed into the elastic pad floating track bed, and the vibration damping performance is upgraded.
In conclusion, the secondary pouring type upgradeable general ballast bed has the advantages of simple structure, short construction period, easy guarantee of engineering quality, quick upgrade of vibration reduction level, higher cost performance and the like; the construction method disclosed by the invention has the advantages of simpler and more reasonable process setting, high process integration degree, less waiting time and high construction efficiency, is favorable for greatly shortening the construction time, can be widely applied to rail transit lines such as high-speed rails, subways and the like, and has very broad market application prospects.
Drawings
FIG. 1 is a schematic diagram of a secondary casting type upgradeable universal ballast bed according to the present invention.
Fig. 2 is a cross-sectional view A-A of fig. 1.
FIG. 3 is a second schematic diagram of a secondary casting type upgradeable ballast bed according to the present invention.
Fig. 4 is a B-B cross-sectional view of fig. 3.
Fig. 5 is one of the C-C cross-sectional views of fig. 3.
FIG. 6 is a second cross-sectional view of the C-C of FIG. 3.
FIG. 7 is a third cross-sectional view of the C-C of FIG. 3.
FIG. 8 is a third schematic diagram of a secondary casting type upgradeable ballast bed according to the present invention.
Fig. 9 is a D-D cross-sectional view of fig. 8.
FIG. 10 is a schematic diagram of a secondary casting type upgradeable universal ballast bed according to the present invention.
Fig. 11 is a sectional view of E-E of fig. 10.
FIG. 12 is a schematic diagram of a two-shot upgradeable utility ballast bed according to the present invention.
FIG. 13 is a schematic diagram of a two-shot upgradeable universal ballast bed according to the present invention.
Detailed Description
Example 1
The secondary pouring type upgradeable general track bed disclosed by the invention as shown in fig. 1 and 2 comprises a combined track bed plate unit 1 and a connecting layer 2, wherein the combined track bed plate unit 1 comprises a prefabricated base plate 4 and a prefabricated track bed plate 3, the prefabricated track bed plate 3 is positioned above the prefabricated base plate 4, a height adjusting layer 5 is arranged between the prefabricated base plate 4 and the prefabricated track bed plate 3, and the height adjusting layer 5 and the prefabricated base plate 4 and the prefabricated track bed plate 3 are respectively kept in a detachable state; a horizontal limit structure is arranged between the prefabricated base plate 4 and the prefabricated track bed plate 3 and the foundation 7, the horizontal limit structure is specifically a limit boss 6 fixedly arranged on the foundation 7, and the limit boss 6 is longitudinally arranged on two sides of the end parts of the adjacent combined track bed plate units 1 along the steel rail; the prefabricated base plate 4 is connected with the foundation 7 through the connection layer 2 of secondary pouring, the connection layer 2 is composed of self-compacting concrete, and pouring through holes 8 for secondary pouring are correspondingly formed in the prefabricated base plate 4 and the prefabricated road bed plate 3. In use, the rail 9 and the fastener system 10 are placed on the prefabricated track bed 3.
In this example, the prefabricated base plate 4 and the prefabricated track bed plate 3 have the same plate body length. Of course, based on the technical principle of this example, in practical application, the lengths of the prefabricated base board 4 and the prefabricated track bed board 3 may also be different.
The secondary pouring type upgradeable general ballast bed can be constructed by the following construction method, and comprises the following steps:
(1) Scribing on the foundation 7;
(2) Assembling and placing the prefabricated base plate 4, the height adjusting layer 5 and the prefabricated track bed plate 3 together to form a combined track bed plate unit 1, and then integrally hoisting and transporting the combined track bed plate unit 1 to a designated position on a foundation 7 in sequence;
(3) The combined ballast bed plate unit 1 is limited in the transverse direction of the steel rail by utilizing a limiting boss 6;
(4) Lifting the combined ballast bed plate unit 1 to the designed height of the track;
(5) Pouring self-compacting concrete between the prefabricated base plate 4 and the foundation 7 through pouring through holes 8 arranged on the prefabricated base plate 4 and the prefabricated road bed plate 3 to form a connecting layer 2;
(6) And curing the self-compacting concrete of the connecting layer 2 until the design strength is reached, thereby forming the secondary pouring type upgradeable universal ballast bed.
When the vibration reduction level is required to be upgraded, firstly, the prefabricated road bed board 3 is lifted, the original height adjusting layer 5 is removed, the elastic vibration reduction pad with proper thickness is used as a new height adjusting layer, the prefabricated road bed board 3 is put again, and the secondary pouring type upgradeable general road bed can be upgraded to the elastic pad floating road bed, so that the method is quite convenient.
The secondary pouring type upgradeable universal ballast bed adopts the combined ballast bed plate units, and compared with the track ballast bed with the traditional structure, the secondary pouring type upgradeable universal ballast bed has the following beneficial technical effects: (1) In the construction process of the secondary pouring type upgradeable general track bed, only the connecting layer needs to be poured on site, so that the workload of on-site pouring and maintenance is greatly reduced, the defects of multiple construction procedures, multiple waiting time and long construction period of the traditional track bed that the substrate needs to be poured first and then the track bed is poured are overcome, the on-site workload is small, the maintenance period is short, and the construction speed is further greatly improved; (2) Because the substrate and the main body of the track bed adopt the prefabricated substrate plate and the prefabricated track bed plate produced by prefabricating the ground respectively, the influence of the operation level of site constructors is small, and the dimensional accuracy and the engineering quality are more ensured; (3) The combined track bed plate unit formed by the prefabricated base plate, the height adjusting layer and the prefabricated track bed plate can be paved in place at one time, so that the construction process is greatly reduced, the construction speed is further improved, and the construction period is shortened; (4) In the invention, the separable height adjusting layer is preset between the prefabricated base plate and the prefabricated track bed plate, and when vibration exceeds standard, the elastic vibration damping material layer can be used for replacing the original height adjusting layer at any time, so that the common track bed is transformed into the elastic pad floating track bed, and the vibration damping performance is upgraded.
In conclusion, the secondary pouring type upgradeable general ballast bed has the advantages of simple structure, short construction period, easy guarantee of engineering quality, quick upgrade of vibration reduction level, higher cost performance and the like; the construction method disclosed by the invention has the advantages of simpler and more reasonable process setting, high process integration degree, less waiting time and high construction efficiency, is favorable for greatly shortening the construction time, can be widely applied to rail transit lines such as high-speed rails, subways and the like, and has very broad market application prospects.
It should be noted that in the secondary pouring type upgradeable general track bed described in this example, the height adjusting layer adopts a strip-shaped continuous laying arrangement mode, and specifically, the height adjusting layer can be made of hard rubber or hard polyurethane with a larger surface friction coefficient; preferably, the height adjusting layer is formed by an anti-skid pad, for example, the anti-skid pad disclosed in China patent No. 200810238390.0 has the greatest advantages that the surface friction system of the anti-skid pad is large, displacement is not easy to occur in the use process, the anti-skid pad can be stacked layer by layer, the height is convenient to accurately adjust and compensate errors, in addition, the anti-skid pad can be detached at any time, and the operation is very convenient in the later vibration reduction and upgrading process; in addition, the connecting layer can be formed by self-leveling mortar or other materials besides self-compacting concrete, so long as secondary pouring is convenient to realize and the strength is enough to be applied to the invention; in this example, three sets of pouring through holes for secondary pouring are correspondingly arranged at the central line of the longitudinal direction of the steel rail of the prefabricated base plate and the prefabricated track bed plate, and the number and the positions of the pouring through holes can be set according to the actual requirements of engineering in practical application, and the number of the pouring through holes can be more than three, or less than three. The technical scheme is based on different modes of the technical principle of the invention, and the technical scheme is within the protection scope of the invention. The above description applies equally to other embodiments of the invention.
Example two
The present invention is also applicable to applications in tunnels, for example, as shown in fig. 3,4 and 5, the secondary pouring type upgradeable general ballast bed of the present invention is different from the first embodiment in that the foundation 7 is specifically a tunnel wall, and in order to meet the drainage requirement, two drainage ditches 11 are further provided on the prefabricated base plate 4; in addition, as shown in fig. 3 and 5, a horizontal limit structure is arranged between the prefabricated base plate 4 and the prefabricated road bed plate 3, the horizontal limit structure comprises limit channels correspondingly arranged on the prefabricated road bed plate 3, limit columns 12 are arranged in the limit channels, the lower ends of the limit columns 12 are connected with a connecting structure arranged on the prefabricated base plate 4, the connecting structure is an anchoring pipe cavity formed by an anchoring connecting pipe 14 fixedly arranged on the prefabricated base plate 4, and the bottom ends of the limit columns 12 are in wedge-shaped insertion in the anchoring pipe cavity; in addition, the limit post 12 is arranged in the middle of the plate end of the prefabricated road bed plate 3, and in order to prevent direct contact collision between the limit post 12 and the prefabricated road bed plate 3, a buffer layer 13 is further arranged between the limit post 12 and the prefabricated road bed plate 3, and the buffer layer 13 is made of a solid damping material.
The secondary pouring type upgradeable general ballast bed can be constructed by the following construction method, and comprises the following steps:
(1) Scribing on the foundation 7;
(2) Assembling and placing the prefabricated base plate 4, the height adjusting layer 5 and the prefabricated track bed plate 3 together to form a combined track bed plate unit 1, and then integrally hoisting and transporting the combined track bed plate unit 1 to a designated position on a foundation 7 in sequence;
(3) The prefabricated base plate 4 is connected with the prefabricated track bed plate 3 by using a limiting column 12, and the combined track bed plate unit 1 is limited;
(4) Lifting the combined ballast bed plate unit 1 to the designed height of the track;
(5) Pouring self-leveling mortar between the prefabricated base plate 4 and the foundation 7 through pouring through holes 8 arranged on the prefabricated base plate 4 and the prefabricated road bed plate 3 to form a connecting layer 2;
(6) And curing the self-leveling mortar of the connecting layer 2 until the design strength is reached, thereby forming the secondary pouring type upgradeable universal ballast bed.
When the vibration reduction level is required to be upgraded, the horizontal limiting structure between the prefabricated base plate and the prefabricated track bed plate can be removed, the prefabricated track bed plate is lifted, the original height adjusting layer is removed, the prefabricated track bed plate is put again by using the elastic vibration reduction pad with proper thickness as the new height adjusting layer, and the horizontal limiting structure is installed, so that the secondary pouring type upgradeable general track bed can be upgraded to an elastic pad floating track bed.
Compared with the first technical scheme, the secondary pouring type upgradeable general track bed is more compact in structure, the limiting columns are arranged in the middle of the plate ends of the prefabricated track bed plates, and each end can effectively control the transverse and vertical displacement of the steel rail only by arranging one limiting column. It is particularly pointed out that in the solution described in this example, the positions of the prefabricated base plate and the prefabricated track bed are staggered with respect to each other, so as to ensure that the limit posts 12 can be inserted into the anchoring lumens formed by the anchoring connection tubes 14 provided on the prefabricated base plate through limit channels provided on the prefabricated track bed.
Of course, in the technical solution described in this example, the connection layer may also be formed by self-compacting concrete, which is also within the scope of protection claimed in the present invention.
Example III
The secondary pouring type upgradeable general track bed disclosed by the invention as shown in fig. 6 is different from the second embodiment in that a horizontal limit structure is arranged between the prefabricated base plate 4 and the prefabricated track bed plate 3, the horizontal limit structure comprises limit channels correspondingly arranged on the prefabricated track bed plate 3, limit columns 12 are arranged in the limit channels, the lower ends of the limit columns 12 are connected with a connecting structure arranged on the prefabricated base plate 4, the connecting structure comprises an anchoring channel 15 fixedly arranged on the prefabricated base plate 4, and correspondingly, a hanging block 21 is arranged at the lower ends of the limit columns 12 and is connected with the anchoring channel 15 in a hanging manner; in addition, in order to facilitate the height adjustment and leveling of the combined track bed units, the prefabricated base plate 4 is also provided with a height adjusting device which comprises an adjusting bracket 16 and an adjusting bolt 17.
The secondary pouring type upgradeable general ballast bed can be constructed by the following construction method, and comprises the following steps:
(1) Scribing on the foundation 7;
(2) Assembling and placing the prefabricated base plate 4, the height adjusting layer 5 and the prefabricated track bed plate 3 together to form a combined track bed plate unit 1, and then integrally hoisting and transporting the combined track bed plate unit 1 to a designated position on a foundation 7 in sequence;
(3) The prefabricated base plate 4 is connected with the prefabricated track bed plate 3 by utilizing the cooperation of the limiting column 12 and the anchoring channel 15, and the combined track bed plate unit 1 is limited;
(4) Lifting the combined ballast bed plate unit 1 to the designed height of the track by utilizing an adjusting bracket 16 and an adjusting bolt 17 which are arranged on the prefabricated base plate 4;
(5) Pouring self-leveling mortar between the prefabricated base plate 4 and the foundation 7 through pouring through holes 8 arranged on the prefabricated base plate 4 and the prefabricated road bed plate 3 to form a connecting layer 2;
(6) And curing the self-leveling mortar of the connecting layer 2 until the design strength is reached, thereby forming the secondary pouring type upgradeable universal ballast bed.
When the vibration reduction level is required to be upgraded, the limiting column 12 can be rotated at first, the hanging between the hanging block 21 and the anchoring channel 15 is released, namely, the horizontal limiting structure between the prefabricated base plate and the prefabricated track bed plate is removed, then the prefabricated track bed plate is lifted, the original height adjusting layer is removed, the prefabricated track bed plate is put again by using the elastic vibration reduction pad with proper thickness as a new height adjusting layer, the hanging block 21 at the bottom end of the limiting column 12 is hung with the anchoring channel 15 again, the installation of the horizontal limiting structure is realized, and the upgrading from the secondary pouring type upgradeable general track bed to the elastic pad floating track bed can be completed.
Compared with the technical scheme of the second embodiment, in the technical scheme of the second embodiment, the height adjusting device is additionally arranged on the prefabricated base plate, so that the combined ballast bed plate unit is more rapid and accurate in height adjusting and leveling operation, and the construction efficiency is further improved. It should be noted that, in this example, the hanging block 21 at the bottom end of the limiting post 12 is matched with the anchoring channel 15 to carry out hanging connection, so that the limiting post 12 should be prevented from rotating accidentally during the use process, and the hanging failure is avoided.
Example IV
Based on the technical principles of the second embodiment and the third embodiment, in the secondary pouring type upgradeable general track bed, the connection structure between the lower end of the limit post and the prefabricated base plate can be various, and in addition, the specific structural form of the height adjusting device arranged on the prefabricated base plate can be various. For example, as shown in fig. 7, the secondary pouring type upgradeable general ballast bed of the present invention is different from the third embodiment in that the connection structure includes an anchor threaded connection 18 fixedly arranged on the prefabricated base plate 4, and correspondingly, a threaded connection hole is arranged at the lower end of the limiting post 12 and fixedly connected with the anchor threaded connection 18; in addition, in the height adjusting device arranged on the prefabricated base plate 4, the adjusting bracket 16 is specifically a steel plate, one end of the steel plate is anchored in the prefabricated base plate 4, and the adjusting bolt 17 is matched with a threaded hole arranged on the steel plate to adjust the height; in addition, a lifting interface is further arranged on the prefabricated road bed board, and the lifting interface is specifically an anchoring lifting connector 19 fixedly arranged on the prefabricated road bed board.
The secondary pouring type upgradeable general ballast bed can be constructed by the following construction method, and comprises the following steps:
(1) Scribing on the foundation 7;
(2) Assembling and placing the prefabricated base plate 4, the height adjusting layer 5 and the prefabricated track bed plate 3 together to form a combined track bed plate unit 1, and then integrally hoisting and transporting the combined track bed plate unit 1 to a designated position on a foundation 7 in sequence;
(3) The prefabricated base plate 4 is connected with the prefabricated track bed plate 3 by utilizing the cooperation of the limiting column 12 and the anchoring threaded connecting piece 18, and the combined track bed plate unit 1 is limited;
(4) Lifting the combined ballast bed plate unit 1 to the designed height of the track by utilizing an adjusting bracket 16 and an adjusting bolt 17 which are arranged on the prefabricated base plate 4;
(5) Pouring self-leveling mortar between the prefabricated base plate 4 and the foundation 7 through pouring through holes 8 arranged on the prefabricated base plate 4 and the prefabricated road bed plate 3 to form a connecting layer 2;
(6) And curing the self-leveling mortar of the connecting layer 2 until the design strength is reached, thereby forming the secondary pouring type upgradeable universal ballast bed.
When the vibration reduction level is required to be upgraded, the limiting column 12 can be rotated at first, the threaded connection between the limiting column 12 and the anchoring threaded connection piece 18 is released, namely, the horizontal limiting structure between the prefabricated base plate and the prefabricated track bed board is removed, then the prefabricated track bed board is lifted by utilizing the anchoring lifting connection piece 19 fixedly arranged on the prefabricated track bed board 3, the original height adjusting layer is removed, the prefabricated track bed board is placed again by utilizing the elastic vibration reduction pad with proper thickness as a new height adjusting layer, the limiting column 12 is connected with the anchoring threaded connection piece 18 again, the installation of the horizontal limiting structure is realized, and the upgrade from the secondary pouring type upgradeable general track bed to the elastic pad floating track bed can be completed.
Compared with the embodiment, in the technical scheme, as the lifting interface is further arranged on the prefabricated road bed, when the vibration reduction level is required to be upgraded, the prefabricated road bed board is lifted more easily.
It should be noted that, based on the technical principle of this example, a threaded column may be disposed at the lower end of the limiting column, and correspondingly, a threaded hole is disposed on the anchoring threaded connector to cooperate with the threaded column, so that the same technical effect can be achieved.
Example five
The secondary pouring type upgradeable general track bed of the invention as shown in fig. 8 and 9 is different from the third embodiment in that a horizontal limit structure is arranged between the prefabricated base plate 4 and the prefabricated track bed plates 3, the horizontal limit structure comprises two limit channels correspondingly arranged at two side ends of the plate body of each prefabricated track bed plate 3, limit columns 12 are arranged in the limit channels, the lower ends of the limit columns 12 are connected with a connecting structure arranged on the prefabricated base plate 4, the connecting structure comprises a drainage ditch 11 with a cross section shape of which the upper part is small and the lower part is large, and correspondingly, hanging blocks 21 are arranged at the lower ends of the limit columns 12 and are connected with the drainage ditch 11 in a hanging way; in addition, the prefabricated road bed board 3 is also provided with a lifting interface, and the lifting interface is specifically a lifting groove 20 arranged at the bottoms of two sides of the prefabricated road bed board 3; in addition, two groups of pouring through holes 8 for secondary pouring are correspondingly arranged at the central line of the longitudinal direction of the steel rail of the prefabricated base plate 4 and the prefabricated track bed plate 3; fourth, the height adjusting layer 5 is laid in a block-shaped interval manner.
The construction method and application method of the technical scheme described in this example are basically the same as those of the third embodiment, and are not repeated here. Compared with the three phases of the embodiment, in the technical scheme, the drainage ditch 11 with a special structure is matched and hung with the limit column 12, an anchoring channel is not required to be additionally arranged, the number of related elements is less, and the structure is simpler; in addition, the drainage ditch is only provided with one, and the position of the drainage ditch is positioned at the middle part of the prefabricated base plate, so that the structural layout is simpler and more reasonable, and adverse effects on the strength of the plate body of the prefabricated base plate caused by the plurality of drainage ditches are avoided.
Example six
The secondary pouring type upgradeable general track bed of the invention as shown in fig. 10 and 11 is different from the fifth embodiment in that the horizontal limit structure comprises two limit channels correspondingly arranged at two side ends of the plate body of each prefabricated track bed plate 3, limit columns 12 are arranged in the limit channels, the limit channels and the limit columns 12 are arranged to avoid the drainage ditch 11, and are specifically arranged at two sides of the longitudinal center line of the steel rail of the prefabricated track bed plate 3 respectively; in addition, the lower end of the limiting column 12 is connected with a connecting structure arranged on the prefabricated base plate 4, the connecting structure is an anchoring pipe cavity formed by an anchoring connecting pipe 14 fixedly arranged on the prefabricated base plate 4, and the bottom end of the limiting column 12 is made into a wedge shape and is inserted into the anchoring pipe cavity; in addition, as shown in fig. 11, a lifting interface is further arranged on the prefabricated road bed plate 3, and the lifting interface is specifically a lifting groove 20 arranged at the middle upper part of two sides of the prefabricated road bed plate 3; four groups of pouring through holes 8 for secondary pouring are symmetrically arranged on the prefabricated base plate 4 and the prefabricated road bed plate 3 along the longitudinal central line of the steel rail.
Compared with the fifth embodiment, the drainage of the technical scheme is smoother; in addition, since the number of the pouring through holes 8 is increased, the pressure required in the secondary pouring of the connecting layer can be appropriately reduced, and the fluidity requirement of the self-compacting concrete or self-leveling mortar to be used can be appropriately reduced.
Example seven
Based on the technical principles of the first embodiment and the second embodiment, as shown in fig. 12, the secondary pouring type upgradeable general track bed of the invention is characterized in that a limit channel is respectively arranged on the prefabricated base plate 4 and the prefabricated track bed plate 3 corresponding to the limit boss 6, and the limit boss 6 is embedded in the limit channel.
The construction and application methods of the technical scheme described in this example are basically the same as those described in the first embodiment, and are not repeated here. Compared with the first embodiment, the technical scheme not only can realize the transverse limit of the prefabricated base plate and the prefabricated road bed plate on the steel rail, but also can realize the longitudinal limit of the prefabricated base plate and the steel rail of the prefabricated road bed plate.
Of course, based on the technical principle of this example, besides the rectangular limit boss can be fixed on the basis, as shown in fig. 13, the cylindrical limit post 12 can also be fixed on the basis, and the limit post 12 is embedded in the limit channels arranged on the prefabricated base plate and the prefabricated road bed plate, so that the same technical effect can be achieved, and the protection scope of the invention is also claimed.
The embodiments of the present invention are mainly for facilitating understanding of the technical principles of the present invention, and are not limited to those described in the above embodiments, but the technical principles described in the above embodiments may also be used interchangeably, based on the technical principles of the present invention, those skilled in the art may recombine the technical solutions described in the above embodiments or simply replace some elements thereof with similar technologies, so long as they are within the scope of protection claimed by the present invention based on the technical principles of the present invention.
Claims (10)
1. The secondary pouring type upgradeable general track bed is characterized by comprising a combined track bed plate unit and a connecting layer, wherein the combined track bed plate unit comprises a prefabricated base plate and a prefabricated track bed plate, the prefabricated track bed plate is positioned above the prefabricated base plate, a height adjusting layer is arranged between the prefabricated base plate and the prefabricated track bed plate, the prefabricated base plate, the height adjusting layer and the prefabricated track bed plate are assembled and placed together to form the combined track bed plate unit, and the height adjusting layer and the prefabricated base plate and the prefabricated track bed plate are respectively kept in a detachable state; a horizontal limiting structure is arranged between the prefabricated base plate and the prefabricated track bed plate and comprises limiting channels correspondingly arranged on the prefabricated track bed plate, limiting columns are arranged in the limiting channels, and the lower ends of the limiting columns are connected with a connecting structure arranged on the prefabricated base plate; the prefabricated base plate is connected with the foundation through a secondarily poured connecting layer, and pouring through holes for secondary pouring are correspondingly formed in the prefabricated base plate and the prefabricated road bed plate; the prefabricated road bed board is provided with a lifting interface.
2. The secondary casting type upgradeable general ballast bed according to claim 1, wherein the height adjusting layer is composed of an anti-slip pad.
3. The secondary pouring type upgradeable general ballast bed according to claim 1, wherein a height adjusting device is arranged on the prefabricated base plate, and the height adjusting device comprises an adjusting bracket and an adjusting bolt.
4. The secondary pouring type upgradeable general track bed according to claim 1, wherein the connecting structure comprises an anchor threaded connector fixedly arranged on the prefabricated base plate, an anchor pipe cavity fixedly arranged on the prefabricated base plate, an anchor channel fixedly arranged on the prefabricated base plate, or a drainage ditch with a cross section in a small-top-large structure, and correspondingly, the lower end of the limiting column is fixedly connected with the anchor threaded connector, or the limiting column is inserted in the anchor pipe cavity, or the lower end of the limiting column is provided with a hanging block which is connected with the anchor channel or the drainage ditch in a hanging manner.
5. The secondary casting type upgradeable general ballast bed according to claim 1, wherein the connection layer is composed of self-leveling mortar or self-compacting concrete.
6. The secondary casting type upgradeable general ballast bed according to claim 1, wherein the prefabricated base slab and the prefabricated track slab have the same slab length.
7. The secondary casting type upgradeable general ballast bed according to claim 1, wherein the lifting interface comprises an anchoring lifting connector or lifting groove provided on the prefabricated track bed board.
8. A method of constructing a secondary casting type upgradeable universal ballast bed according to any one of claims 1 to 7, comprising the steps of:
(1) Scribing on the basis;
(2) Assembling and placing the prefabricated base plate, the height adjusting layer and the prefabricated ballast bed plate together to form a combined ballast bed plate unit, and then sequentially and integrally hoisting and transporting the combined ballast bed plate unit to a designated position on a foundation;
(3) The combined ballast bed plate units are limited at least in the transverse direction of the steel rail by utilizing a horizontal limiting structure;
(4) Lifting the combined ballast bed plate unit to the designed height of the track;
(5) Pouring self-compacting concrete or self-leveling mortar between the prefabricated base plate and the foundation through pouring through holes arranged on the prefabricated base plate and the prefabricated road bed plate to form a connecting layer;
(6) And curing the self-compacting concrete or self-leveling mortar of the connecting layer until the design strength is reached, thereby forming the secondary pouring type upgradeable universal ballast bed.
9. The construction method according to claim 8, wherein when the vibration reduction level is required to be upgraded, the prefabricated ballast bed plate is lifted first, the original height adjusting layer is removed, the prefabricated ballast bed plate is replaced by using an elastic vibration reduction pad with proper thickness as a new height adjusting layer, and the secondary pouring type upgradeable universal ballast bed is completed to the upgrade of the elastic pad floating ballast bed.
10. The construction method according to claim 9, wherein the horizontal limit structure between the prefabricated base plate and the prefabricated track bed plate is removed first, then the prefabricated track bed plate is lifted, the original height adjusting layer is removed, the prefabricated track bed plate is put again by using the elastic vibration damping pad with proper thickness as the new height adjusting layer, and the horizontal limit structure is installed, so that the secondary pouring type upgradeable general track bed is completed to the upgrade of the elastic pad floating track bed.
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| CN201810667866.6A CN108560330B (en) | 2018-06-26 | 2018-06-26 | Secondary pouring type upgradeable general ballast bed and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810667866.6A CN108560330B (en) | 2018-06-26 | 2018-06-26 | Secondary pouring type upgradeable general ballast bed and construction method thereof |
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| CN108560330A CN108560330A (en) | 2018-09-21 |
| CN108560330B true CN108560330B (en) | 2024-05-17 |
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| CN113584954A (en) * | 2021-04-27 | 2021-11-02 | 北京九州一轨环境科技股份有限公司 | Prefabricated assembly periodic structure for track base and construction method thereof |
| CN113355957A (en) * | 2021-06-30 | 2021-09-07 | 中铁一局集团有限公司 | Multi-level vibration reduction general prefabricated ballast bed construction method |
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| CN108560330A (en) | 2018-09-21 |
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