CN210657805U - Liftable ballastless track structure - Google Patents
Liftable ballastless track structure Download PDFInfo
- Publication number
- CN210657805U CN210657805U CN201921577795.7U CN201921577795U CN210657805U CN 210657805 U CN210657805 U CN 210657805U CN 201921577795 U CN201921577795 U CN 201921577795U CN 210657805 U CN210657805 U CN 210657805U
- Authority
- CN
- China
- Prior art keywords
- handed
- nut
- track
- base
- handed nut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The utility model discloses a liftable ballastless track structure, this structure makes through the drive adjusting nut the left-handed nut and the right-handed nut on the transfer line are close to relatively or keep away from relatively, thereby realize respectively with the interval between track board and the base that left-handed nut and right-handed nut are connected increases or reduces, the space between track board and the base is supported through setting up the cushion, can break through the regulation range limit value of prior art, effectively adapt to the large amount of values, the lasting upwarp or the settlement deformation of special districts such as inflation ground area cutting, the regulation precision is high, the precision control of especially adapted upgoing downhill path, bend circuit effectively reduces the railway speed limit operation job site, ensures the speed of railway operation, improves the factor of safety of railway operation, reduces the number of times of stopping transport overhaul, saves the operation maintenance cost, initial installation operation is convenient, the elevation adjustment operation is convenient, and the method has good application prospect.
Description
Technical Field
The utility model relates to a railway track maintains technical field, in particular to ballastless track structure of liftable.
Background
The deformation adjustment of the ballastless track of the high-speed railway is mainly realized by fasteners, the deformation adjustment capability of the existing standard fasteners is weaker, the total adjustment amount is not more than 40mm, namely, the total adjustment amount is 25mm upwards and 15mm downwards, the ballastless track structure must be subjected to speed-limited operation or maintenance beyond the limit, huge maintenance cost and operation loss are caused, long-term continuous deformation of a foundation is difficult to control in some specific areas, such as areas of settlement, expansive rocks, soft rock deep cuts and the like, particularly, the deep cuts of expansive rock soil often have continuous long-term upward arching deformation due to comprehensive factors such as expansibility, soft rock rheological property and the like, in the prior art, although a method for adjusting the continuous deformation of the cuts in the expansive areas is provided, the effect is poor, the stability is insufficient, the construction cost is too high, the construction period is prolonged, and therefore, a large-adjustment amount, a large-adjustable deformation, a large-size, and a large deformation, The ballastless track structure capable of ascending and descending has an urgent need to provide the ballastless track structure capable of ascending and descending.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the big deflection that ballastless track structure among the prior art is difficult to satisfy special area and long duration's regulation demand for the railway speed limit job site is more, threatens the safe operation of high-speed railway and so on above-mentioned not enough, provides the ballastless track structure of a liftable.
In order to achieve the above object, the present invention provides the following technical solutions:
a liftable ballastless track structure comprises a base, track boards and steel rails, wherein the steel rails are arranged on the track boards, a gap is formed between the track boards and the base, cushion blocks are arranged in the gap, each track board is provided with a vertical channel I, the base is provided with a vertical channel II, the shape and the position of each channel I are matched with the shape and the position of one channel II, a transmission rod is arranged in a channel formed by each channel I and the corresponding channel II, a left-handed thread section and a right-handed thread section are arranged on the transmission rod, a left-handed nut is in threaded connection with the left-handed thread section, a right-handed nut is in threaded connection with the right-handed thread section and is connected with the base, the right-handed nut is connected with the corresponding track boards, an adjusting nut is further arranged on the transmission rod and is arranged between the left-handed nut and the right-handed nut, the adjusting nut is driven to enable the transmission rod to rotate, the left-handed nut and the right-handed nut can be relatively close to or far away from each other, a first groove is formed in the bottom surface of each track plate, and/or a second groove is formed in the top surface of the base, a clamping block is arranged in a cavity formed by the first groove and the second groove, the shape of the clamping block is matched with that of the cavity, a clamping groove is connected to the inner side of the clamping block, and the clamping groove is clamped to the adjusting nut; when the first installation is completed, the two ends of the transmission rod respectively have gaps with the top of the first channel and the bottom of the second channel.
By adopting the liftable ballastless track structure of the utility model, the left-handed nut and the right-handed nut on the transmission rod are relatively close to or relatively far away from each other by driving the adjusting nut, so that the distance between the track plate and the base which are respectively connected with the left-handed nut and the right-handed nut is increased or reduced, after the adjustment is finished, the clamping groove on the clamping block is clamped with the adjusting nut, because the clamping block is limited by the first groove and/or the second groove, the looseness of the adjusting nut under the action of cyclic vibration load listed at the upper part can be effectively prevented, the gap between the track plate and the base is supported by arranging the cushion block, the height and the number of the cushion block are determined according to the design requirement, the cushion block is used as a temporary support of the track plate, the concentrated stress of the nut is effectively reduced, and the upper train load is dispersed, the range of the distance adjustment of the left-handed nut and the right-handed nut is determined according to the length of the left-handed thread segment and the length of the right-handed thread segment, the initial distance between the left-handed nut and the right-handed nut, and the initial gap distance between the two ends of the transmission rod and the top of the first channel and the initial gap distance between the two bottoms of the second channel, which can be designed according to specific needs, so that the adjustment range limit value of the prior art can be broken through, the device can effectively adapt to the continuous upwarp or settlement deformation of a large number of special sections such as a cutting in an expansive rock-soil area, and the like, has high adjustment precision, is particularly suitable for the precision control of an upgoing slope line and a curve line, effectively reduces the speed-limiting railway operation work point, ensures the speed of railway operation, improves the safety coefficient of the railway operation, reduces the times of overhaul, has good application prospect.
Preferably, the width of the outer side of the latch is greater than the width of the inner side of the latch.
The outer side of the clamping block is one side far away from the central line of the track, and the inner side of the clamping block is one side close to the central line of the track.
Preferably, the top surface of the clamping block is an inclined surface, and the height of the outer side of the clamping block is higher than the height of the inner side of the clamping block.
By adopting the arrangement mode, the operation of rotating the adjusting nut is convenient.
Further preferably, the included angle between the top surface and the bottom surface of the fixture block is 30-45 degrees.
Preferably, the left-handed nut is connected to the base or the track plate through a first embedded steel bar, and the right-handed nut is connected to the corresponding track plate or the base through a second embedded steel bar.
Preferably, the thread pitch of the left-handed thread section is the same as the thread pitch of the right-handed thread section, and the length of the left-handed thread section is the same as the length of the right-handed thread section.
Preferably, the left-hand thread section and the right-hand thread section are both trapezoidal threads.
Preferably, each cushion block comprises a plurality of cushion plates with the same thickness, and each cushion block is arranged between two adjacent clamping blocks on the same side.
The cushion blocks are formed by a plurality of cushion plates with the same thickness, so that the height of the cushion blocks can be adjusted by adding and subtracting the corresponding number of cushion plates after the track slab is lifted.
Preferably, the cushion blocks are symmetrically arranged along two sides of the central line of the track.
Preferably, the drive link is located outside the rail.
The steel rail support device is located on the outer side of the steel rail, operation and adjustment are convenient, steel rail support stability is convenient, and fixture block cost is saved.
A method for adjusting a liftable ballastless track structure comprises the following steps:
a. taking out the fixture block between the base and the track slab;
b. when the elevation of the track slab needs to be increased, firstly rotating the transmission rod to enable the track slab to rise to be 10-15mm higher than a target elevation, then enabling the height of the cushion block to meet the target elevation of the track slab, and then reversely rotating the transmission rod to enable the track slab to descend to the target elevation and abut against the top surface of the cushion block; when the elevation of the track slab needs to be lowered, the transmission rod is rotated to enable the track slab to rise, then the height of the cushion block meets the target elevation of the track slab, and then the transmission rod is rotated reversely to enable the track slab to fall to the target elevation and abut against the top surface of the cushion block;
c. and inserting a clamping block matched with a cavity formed by the first groove and the second groove, and locking the transmission rod to complete the height adjustment of the ballastless track structure.
Adopt a liftable ballastless track structure's adjusting method, required manual work is few, the independent operation of being convenient for, the operation link is few, accommodation process convenient and fast, very big degree shortens the activity duration, and is little to the surrounding environment influence, improves accommodation process security, maintains to the long-term operation of the railway in inflation ground area and has great meaning.
Preferably, a rotating adjusting nut is used to drive the transmission rod.
To sum up, compare with prior art, the beneficial effects of the utility model are that:
1. adopt a ballastless track structure of liftable, can break through prior art's regulation range limit value, effectively adapt to a large amount of values of special districts such as inflation ground area cutting, the last hunch or the settlement deformation of continuation, adjust the precision height, specially adapted goes up the downhill path circuit, the accuracy control of bend circuit, effectively reduce railway speed limit operation work point, guarantee railway operation's speed, improve railway operation's factor of safety, reduce the outage overhaul number of times, save the operation maintenance cost, initial installation operation is convenient, the operation is adjusted to the elevation is convenient, good application prospect has.
2. Adopt a liftable ballastless track structure's adjusting method, required manual work is few, the independent operation of being convenient for, the operation link is few, accommodation process convenient and fast, very big degree shortens the activity duration, and is little to the surrounding environment influence, improves accommodation process security, maintains to the long-term operation of the railway in inflation ground area and has great meaning.
Description of the drawings:
fig. 1 is a schematic cross-sectional view of a liftable ballastless track structure in embodiment 1;
fig. 2 is a structural top view of a liftable ballastless track structure in embodiment 1;
fig. 3 is a structural side view of a liftable ballastless track structure in embodiment 1.
The labels in the figure are: the track comprises a base 1, a track plate 2, a track plate 3, a cushion block 4, a first channel 51, a second channel 52, a transmission rod 6, an adjusting nut 61 and a clamping block 7.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the above-mentioned subject matter is limited to the following embodiments, and all the technologies realized based on the present invention are within the scope of the present invention.
Example 1
As shown in fig. 1-3, a ballastless track structure of liftable, contain base 1, track board 2 and two rail 3, a plurality of 2 concatenation of track board form whole track board, two rail 3 locates on the whole track board.
Specifically, a first vertical channel 51 is arranged on the bottom surface of each track slab 2, an opening of the first channel 51 faces downward, each first channel 51 is located on the outer side of the steel rail 3, that is, on the side away from the center line of the track slab 2, a second vertical channel 52 is arranged on the top surface of the base 1, an opening of each second channel 52 faces upward, the shape and position of each first channel 51 are matched with the shape and position of one second channel 52, the specific size and number are determined according to design requirements, for example, each track slab 2 is provided with at least four first vertical channels 51 which are symmetrically arranged on the track slab 2, in this embodiment, each track slab 2 is provided with six first channels 51, one matched second channel 52 is arranged below each first channel 51, and the depths of the first channels 51 and the second channels 52 are 170mm, the diameter is 50mm, every passageway 51 and the corresponding be equipped with the transfer line 6 in the passageway that two 52 of passageway formed, the diameter of transfer line 6 is less than the diameter of passageway 51 and two 52, if the diameter of transfer line 6 is 30-40mm, be equipped with left-handed screw thread section and right-handed screw thread section on the transfer line 6, threaded connection has left-handed nut on the left-handed screw thread section, threaded connection has right-handed nut on the right-handed screw thread section, left-handed nut connect in base 1, right-handed nut connects in corresponding track board 2, still be equipped with adjusting nut 61 on the transfer line 6, adjusting nut 61 locates between left-handed nut and the right-handed nut, the drive adjusting nut 61 can make left-handed nut and right-handed nut are close to relatively or keep away from relatively, the relative both sides on the track board 2 passageway 51 symmetry sets up, adjacent two of homonymy passageway one 51 interval equals, passageway two 52 and transfer line 6 also correspond the setting, preferably, the levogyration nut pass through embedded bar one connect in base 1 or track board 2, the dextrorotation nut passes through embedded bar two to be connected in corresponding track board 2 or base 1, embedded bar one and embedded bar two are the dotted line structure that the slant set up in base 1 or the track board 2 in picture 1 respectively by the example, the pitch of levogyration screw thread section with the pitch of dextrorotation screw thread section is the same, the length of levogyration screw thread section with the length of dextrorotation screw thread section is the same, the levogyration screw thread section with the dextrorotation screw thread section is trapezoidal thread.
Have the space between track board 2 and the base 1, be equipped with cushion 4 in the space, the height and the quantity of cushion 4 are confirmed according to the design needs, and are preferred, cushion 4 is along track central line bilateral symmetry, every cushion 4 contains the same steel backing plate of a plurality of thickness, is 10mm if every backing plate thickness, adopts the same backing plate of a plurality of thickness to form cushion 4 is convenient for after track board 2 goes up and down, can accomplish through adding and subtracting the corresponding backing plate of quantity right the regulation of cushion 4 height is equipped with between two adjacent transfer lines 6 of the homonymy of every track board 2 cushion 4.
Each track plate 2 is provided with a first groove on the bottom surface and/or the base 1 is provided with a second groove on the top surface, the embodiment adopts a structure that the first groove and the second groove are simultaneously arranged, the inner end surface of the first groove extends to the opening 51 of the first channel to be connected into a whole, the inner end surface of the second groove extends to the opening 52 of the second channel to be connected into a whole, as shown in fig. 1, a steel fixture block 7 is arranged in a cavity formed by the first groove and the second groove, the inner side of the fixture block 7 is connected with a clamping groove which is clamped in the adjusting nut 61, because the shape of the fixture block 7 is matched with the shape of the cavity, the fixture block 7 is limited by the first groove and the second groove, the adjusting nut 61 can be effectively prevented from loosening under the action of the cyclic vibration load listed on the upper part, preferably, the width of the outer side of the, namely, the width of one side of the fixture block 7, which is far away from the track center line, is greater than the width of one side of the fixture block 7, which is close to the track center line, the top surface of the fixture block 7 is an inclined surface, the bottom surface of the fixture block 7 is a horizontal plane, the height of the outer side of the fixture block 7 is greater than the height of the inner side of the fixture block 7, and if the included angle between the top surface and the bottom surface of the fixture block 7 is 30-45 degrees, the cavity is gradually enlarged from the inner side to the outer side, which.
When the primary installation is completed, the two ends of the transmission rod 6 respectively have equal gaps with the top of the first channel 51 and the bottom of the second channel 52, and the specific gap size is determined according to design requirements.
The device is adopted to overdrive the adjusting nut 61 to enable the left-handed nut and the right-handed nut on the transmission rod 6 to be relatively close to or relatively far away from each other, so that the distance between the track plate 2 and the base 1 which are respectively connected with the left-handed nut and the right-handed nut is increased or reduced, after adjustment is finished, the clamping groove on the clamping block 7 is clamped with the adjusting nut 61, the clamping block 7 is limited by the first groove and/or the second groove, the looseness of the adjusting nut 61 under the action of cyclic vibration load listed on the upper part can be effectively prevented, the gap between the track plate 2 and the base 1 is supported by arranging the cushion block 4, the cushion block 4 is used as a temporary support of the track plate 2, the concentrated stress of the nuts is effectively reduced, the load of an upper train is dispersed, and the adjustment range of the distance between the left-handed nut and the right-handed nut is adjusted according to the length, The initial interval of levogyration nut and dextrorotation nut the both ends of transfer line 6 respectively with the first 51 tops of passageway with the initial clearance distance of the second 52 bottoms of passageway is confirmed, above-mentioned parameter can be designed according to concrete needs, consequently can break through prior art's regulation range limit value, effectively adapt to the swelling ground area cutting road bed by a large amount of value, the upwarp or the settlement deformation of persistence, the regulation precision is high, the specially adapted goes up the downhill path, the accuracy control of bend circuit, effectively reduce railway speed limit operation work point, guarantee railway operation's speed, improve railway operation's factor of safety, reduce the number of times of stopping transport overhaul, save operation maintenance cost, initial installation operation is convenient, elevation regulation operation is convenient, has good application prospect.
Example 2
A ballastless track structure's of liftable adjusting method, including using as embodiment 1 a ballastless track structure of liftable contains following step:
a. taking out the fixture block 7 between the base 1 and the track plate 2;
b. when the elevation of the track slab 2 needs to be increased, firstly rotating the transmission rod 6 to enable the track slab 2 to rise to be 10-15mm higher than a target elevation, then enabling the height of the cushion block 4 to meet the target elevation of the track slab 2, and then reversely rotating the transmission rod 6 to enable the track slab 2 to descend to the target elevation and abut against the top surface of the cushion block 4; when the elevation of the track slab 2 needs to be lowered, firstly, the transmission rod 6 is rotated to enable the track slab 2 to rise, then the height of the cushion block 4 meets the target elevation of the track slab 2, and then the transmission rod 6 is rotated reversely to enable the track slab 2 to fall to the target elevation and abut against the top surface of the cushion block 4;
c. and inserting a fixture block 7 matched with a cavity formed by the first groove and the second groove, locking the transmission rod 6, and completing height adjustment of the ballastless track structure.
Firstly, taking out a fixture block 7 to be adjusted, if the elevation needs to be lowered, firstly rotating a transmission rod 6, if a stepless U-shaped open spanner is adopted to rotate an adjusting nut 61, raising the track plate 2, conveniently extracting steel base plates, lowering the height of a cushion block 4, determining the number of the extracted steel base plates according to the height required to be lowered of the track, extracting the corresponding number of the steel base plates, and then reversely rotating the adjusting nut 61 by the stepless U-shaped open spanner to lower the track plate 2 until the elevation is preset, so that the track plate 2 is tightly attached to the steel base plates; if the elevation needs to be increased, the adjusting nut 61 is directly rotated to enable the track slab 2 to rise to be 10-15mm higher than the target elevation, the number of steel base plates needing to be increased is determined according to the height of the track needing to rise, the corresponding number of steel base plates are inserted into the original steel base plates, the height of the base plates 4 is increased, the adjusting nut 61 is reversely rotated to enable the track slab 2 to descend until the height is preset, the track slab 2 is tightly attached to the steel base plates, finally, the clamping blocks 7 matched with the adjusted cavities are inserted into the corresponding cavities, and height adjustment of the ballastless track structure is completed.
In the present embodiment, when each track plate 2 has a plurality of the transmission levers 6, all the transmission levers 6 should be rotated together to raise or lower the corresponding track plate 2, but it is not required to rotate completely in synchronization.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The liftable ballastless track structure is characterized by comprising a base (1), a track plate (2) and a steel rail (3), wherein the steel rail (3) is arranged on the track plate (2), a gap is formed between the track plate (2) and the base (1), a cushion block (4) is arranged in the gap, each track plate (2) is provided with a vertical channel I (51), the base (1) is provided with a vertical channel II (52), the shape and the position of each channel I (51) are matched with the shape and the position of one channel II (52), a transmission rod (6) is arranged in a channel formed by each channel I (51) and the corresponding channel II (52), the transmission rod (6) is provided with a left-handed thread section and a right-handed thread section, the left-handed thread section is in threaded connection with a left-handed nut, and the right-handed thread section is in threaded connection with a right-handed nut, the left-handed nut is connected to the base (1), the right-handed nut is connected to the corresponding track plate (2), an adjusting nut (61) is further arranged on the transmission rod (6), the adjusting nut (61) is arranged between the left-handed nut and the right-handed nut, the adjusting nut (61) is driven to enable the transmission rod (6) to rotate, the left-handed nut and the right-handed nut can be relatively close to or far away from each other, a first groove is formed in the bottom surface of each track plate (2), and/or a second groove is formed in the top surface of the base (1), a clamping block (7) is arranged in a cavity formed by the first groove and the second groove, the shape of the clamping block (7) is matched with that of the cavity, a clamping groove is connected to the inner side of the clamping block (7), and the clamping groove is clamped to the adjusting; when the primary installation is completed, two ends of the transmission rod (6) respectively have gaps with the top of the first channel (51) and the bottom of the second channel (52).
2. The ballastless track structure of claim 1, wherein the width of the outer side of the fixture block (7) is larger than the width of the inner side of the fixture block (7).
3. The ballastless track structure of claim 1, wherein the top surface of the fixture block (7) is an inclined surface, and the height of the outer side of the fixture block (7) is higher than the height of the inner side of the fixture block (7).
4. The ballastless track structure of claim 3, wherein an included angle between the top surface and the bottom surface of the fixture block (7) is 30-45 °.
5. The ballastless track structure of any one of claims 1 to 4, wherein the left-handed nut is connected to the base (1) or the track slab (2) through a first embedded steel bar, and the right-handed nut is connected to the corresponding track slab (2) or the base (1) through a second embedded steel bar.
6. The ballastless track structure of any one of claims 1-4, wherein a thread pitch of the left-hand thread section is the same as a thread pitch of the right-hand thread section, and a length of the left-hand thread section is the same as a length of the right-hand thread section.
7. The ballastless track structure of any one of claims 1-4, wherein the left-hand thread segment and the right-hand thread segment are both trapezoidal threads.
8. The ballastless track structure of any one of claims 1-4, wherein each of the spacers (4) comprises a plurality of base plates with the same thickness, and each of the spacers (4) is arranged between two adjacent fixture blocks (7) on the same side.
9. The ballastless track structure of any one of claims 1 to 4, wherein the spacers (4) are symmetrically arranged along both sides of the track center line.
10. The ballastless track structure of any one of claims 1-4, wherein the transmission rod (6) is located outside the steel rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921577795.7U CN210657805U (en) | 2019-09-20 | 2019-09-20 | Liftable ballastless track structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921577795.7U CN210657805U (en) | 2019-09-20 | 2019-09-20 | Liftable ballastless track structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210657805U true CN210657805U (en) | 2020-06-02 |
Family
ID=70839477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921577795.7U Active CN210657805U (en) | 2019-09-20 | 2019-09-20 | Liftable ballastless track structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210657805U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110565448A (en) * | 2019-09-20 | 2019-12-13 | 中铁二院工程集团有限责任公司 | Liftable ballastless track structure and adjusting method thereof |
-
2019
- 2019-09-20 CN CN201921577795.7U patent/CN210657805U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110565448A (en) * | 2019-09-20 | 2019-12-13 | 中铁二院工程集团有限责任公司 | Liftable ballastless track structure and adjusting method thereof |
| CN110565448B (en) * | 2019-09-20 | 2024-03-12 | 中铁二院工程集团有限责任公司 | Liftable ballastless track structure and adjusting method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110565448A (en) | Liftable ballastless track structure and adjusting method thereof | |
| CN103821039B (en) | Correcting method for high speed railway ballastless track subgrade in soft soil area | |
| CN108130833B (en) | Deviation rectifying method for settlement and deviation ballastless track | |
| CN206553842U (en) | A kind of combined type mechanically device rectified a deviation for the lifting of high ferro non-fragment orbit | |
| CN210657805U (en) | Liftable ballastless track structure | |
| WO2015127740A1 (en) | Correction method and correction structure for ballastless track subgrade of high-speed railway in soft soil region | |
| CN109778612A (en) | Ballastless track structure method for correcting error in railway tunnel | |
| CN109778611B (en) | Deviation rectifying method for ballastless track structure in railway tunnel | |
| CN103174071A (en) | Construction technology of short sleeper vibration attenuation fastener with improved structure replacing elasticity short sleeper | |
| CN103821040B (en) | For the error-correction structure of soft clay area operation ballastless track of high-speed railway roadbed | |
| CN109355986A (en) | A kind of non-fragment orbit sedimentation regulation method based on rope saw cut | |
| CN109338831A (en) | A kind of non-fragment orbit method for correcting error based on rope saw cut | |
| CN201183928Y (en) | Railway open bridge floor liner plate apparatus | |
| CN210636315U (en) | Supporting cushion block for highway bridge | |
| CN103572774A (en) | Leveling ruler flat underboarding mortar bedding method | |
| CN105133439A (en) | Embedded ballastless track system for greening section | |
| CN103696333A (en) | Frame rail skeleton for use in double-block ballastless rail bed construction and manufacturing method | |
| CN203654110U (en) | Framework track panel for constructing double-block ballastless track bed | |
| CN204000471U (en) | Error-correction structure for soft clay area operation ballastless track of high-speed railway roadbed | |
| CN201317899Y (en) | Track regulator | |
| CN201648890U (en) | Anti-displacement control frame for construction of curve section of track slab | |
| CN103448883A (en) | Installation guiding and temporary fixing device of groined beam of sliding channel | |
| CN214694926U (en) | Lifting deviation rectifying mechanism for ballastless track | |
| CN204753382U (en) | Prefabricated pavement of voiced protective screen of inter -city railway | |
| CN201891086U (en) | Temporary pier top adjusting device for bridge pushing construction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |