CN114318960A - Construction method of spliced railway construction boundary beam - Google Patents
Construction method of spliced railway construction boundary beam Download PDFInfo
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- CN114318960A CN114318960A CN202111592065.6A CN202111592065A CN114318960A CN 114318960 A CN114318960 A CN 114318960A CN 202111592065 A CN202111592065 A CN 202111592065A CN 114318960 A CN114318960 A CN 114318960A
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Abstract
The application relates to a construction method of a spliced railway construction boundary beam, which relates to the field of railway construction and comprises the following steps: s1, preparing; s2, positioning and fixing the longitudinal beam; s3, mounting a cross beam; s4, fixing the cross beam and the longitudinal beam; s3 middle cross beam slides and is provided with two joint poles, the joint pole goes up and down to be provided with and is used for setting up the joint piece on the track, the crossbeam is provided with the drive two joint pole relative motion' S drive assembly. This application has the effect of being convenient for press from both sides the tight fixed to the track to ensure that the longeron is fixed firm, but the longeron circulated practicality has the effect of green construction.
Description
Technical Field
The application relates to the field of railway construction, in particular to a construction method of a spliced railway construction boundary beam.
Background
At present, with the acceleration of railways, the projects of bridge and tunnel reinforcement, bridge replacement and bridge and culvert jacking are more and more, and the construction temporary beam used by the projects is mainly a D-shaped low-height beam, and the span is limited below 24 m. For bridges with a span of more than 24m, the temporary construction temporary beam cannot be constructed in a convenient beam mode, and a 32m railway convenient beam (TB beam for short) is novel line overhead equipment developed on the basis of original D-shaped construction convenient beam and railway general convenient beam (B beam for short) which are used for a long time in China, is a temporary construction convenient beam with a first hole and a span of 32m in China at present, and can be used for engineering construction, emergency rescue, war preparation storage and the like.
The traditional Chinese patent with the patent application number of CN201810653589.3 provides a construction method of a spliced railway construction temporary beam, which comprises the following specific operation steps: determining the approximate number of the needed temporary beams according to the concrete conditions of the road sections, and preparing temporary beam materials; carrying out railway blocking, emptying ballast in a sleeper box of an existing railway track at the erection position along a railway line, and adjusting the distance between sleepers to enable the sleepers to be parallel and equal in distance; when the angle iron is used, the drainage grooves are formed in the angle iron, rainwater can flow out through the drainage grooves, rusting and corrosion are prevented, and the strength of a connecting part is guaranteed; the cross beam can slide in the adjusting grooves of the longitudinal beams, the relative position distance between the two longitudinal beams can be adjusted according to specific conditions, and the bottoms of the angle steels are aligned and fixed with the first mounting holes at different positions, so that different strength requirements are met; above-mentioned technical scheme can adjust the relative position between two longerons, realizes the rigidity between track and the just roof beam, guarantees the intensity of junction to guarantee construction safety.
To the correlation technique among the above-mentioned, the inventor thinks that fix a position the track through the constant head tank on the crossbeam, because the driving in-process, the track is followed the driving and is taken place vibrations, has the crossbeam to the spacing unstable defect of track.
Disclosure of Invention
In order to solve the problem of unstable fixation of a rail, the application provides a construction method of a splicing type railway construction boundary beam.
The construction method for the spliced railway construction boundary beam adopts the following technical scheme:
a construction method of a spliced railway construction boundary beam comprises the following steps:
s1, preparing, namely determining and preparing the number of temporary beams according to the specific conditions of the road section, hollowing ballast in a sleeper box of the existing railway track at the erection position along the railway line, and adjusting the distance between sleepers;
s2, positioning and fixing the longitudinal beam, determining the position of the longitudinal beam according to the site construction condition, and anchoring the longitudinal beam with the ground;
s3, mounting cross beams, wherein the positions of the mounting cross beams are consistent with those of sleepers, the cross beams are arranged from two ends of a longitudinal beam to the center, when the cross beams are plugged, positioning grooves of the cross beams are clamped below a track, the distance between the cross beams is adjusted to be the same as and parallel to the distance between the sleepers, and ballast is backfilled;
s4, fixing the cross beam and the longitudinal beam;
s3 middle cross beam slides and is provided with two joint poles, the joint pole goes up and down to be provided with and is used for setting up the joint piece on the track, the crossbeam is provided with the drive two joint pole relative motion' S drive assembly.
Through adopting above-mentioned technical scheme, confirm the highway section and decide after having decided just roof beam quantity, fix a position the longeron position, through carrying out the anchor to the longeron after the location is accomplished, ensure the firm effect of anchor to the longeron, install the crossbeam again, ensure that the track is located the constant head tank, take place relative motion through two joint poles of drive assembly control, joint piece motion to track side butt, the realization is to orbital tight spacing effect of clamp, ensure to orbital tight fixed effect of clamp, secondly fix crossbeam and longeron through the angle steel again.
Optionally, drive assembly includes double-end threaded rod, two sliders and locating part, double-end threaded rod with the crossbeam lateral wall rotates to be connected, double-end threaded rod's both ends respectively with two slider screw fit, the slider with crossbeam sliding connection, just the slider with joint pole fixed connection, the locating part is used for the restriction the slider rotates.
Optionally, the locating part sets up to the gag lever post, the gag lever post with double-end threaded rod is located same one side of crossbeam, the gag lever post with crossbeam fixed connection, the slider cover is located outside the gag lever post.
Through adopting above-mentioned technical scheme, when drive double threaded rod rotated, this moment under the limiting action of gag lever post, the slider all moved along the length direction of gag lever post, and two joint pieces all moved towards the track direction this moment, and two joint pieces realize the tight effect of track clamp in the constant head tank with the both sides butt of track bottom respectively this moment.
Optionally, the clamping rod is provided with a sliding hole, the clamping rod is provided with a screw rod in the sliding hole in a sliding manner, the screw rod is fixedly connected with the clamping block, the clamping rod is rotatably connected with a driving ring at the opening of the sliding hole, the driving ring is in threaded connection with the screw rod, and the clamping rod is provided with a transmission member for limiting the rotation of the screw rod.
Optionally, the transmission part is set as a transmission block, the transmission block is fixedly connected with the inner wall of the sliding hole, a transmission groove is formed in the peripheral wall of the screw rod, the transmission groove is formed in the axial direction of the screw rod, two ends of the transmission groove are closed, and the transmission block is connected in the transmission groove in a sliding mode.
Through adopting above-mentioned technical scheme, when the drive ring rotated, under driving block and driving groove mating reaction, the screw rod was driven along slide opening length direction motion, and the screw rod drives the joint piece motion to with the laminating of track bottom lateral wall upper surface, realize the fixed effect to the vertical direction position of track.
Optionally, longeron and ground are provided with anchor, anchor includes a plurality of stocks, a plurality of first expander rods, a plurality of second expander rods and slide cartridge, and anchor hole has been seted up on ground, anchor hole inner wall cross-section sets up to the T style of calligraphy, first expander rod with slide cartridge outer wall is articulated, the other end of first expander rod with the one end of second expander rod is articulated, the one end of second expander rod with stock bottom outer wall is articulated, first expander rod with the second expander rod is located in the big part of anchor hole opening, slide sleeve cover establish slide in outside the stock, the stock is provided with the drive first expander rod with the power part that the second expander rod expanded outward, the longeron with fixedly connected with fixing device between the stock.
Through adopting above-mentioned technical scheme, control first expander rod and second expander rod and move towards the stock direction, place first expander rod and second expander rod in the big part of anchor hole opening, through the motion of power component drive slide cartridge, first expander rod and second expander rod expand towards anchor hole side outside this moment, and the concrete is pour towards the downthehole concrete of anchor, forms concrete layer after waiting the concrete maintenance to accomplish, guarantees the firm effect of anchor of stock.
Optionally, the power part is a steel pipe, the steel pipe is sleeved outside the anchor rod and is located above the sliding barrel, and the bottom end of the steel pipe is abutted to the upper end of the sliding barrel.
Through adopting above-mentioned technical scheme, the steel pipe promotes the smooth section of thick bamboo downward motion, is convenient for realize the outer operation that expands of first expander bar and second expander bar.
Optionally, fixing device includes dead lever and first threaded rod, first threaded rod with stock top fixed connection, the dead lever with longeron lateral wall fixed connection, the dead lever slides the cover and is equipped with the thread bush, the thread bush with first threaded rod threaded connection, the dead lever with be provided with the joint subassembly between the thread bush.
Optionally, the joint subassembly includes joint ring and butt dish, the butt dish with the dead lever is close to in the one end fixed connection of first threaded rod, the joint ring with the thread bush is kept away from in the one end fixed connection of first threaded rod, the joint ring cover establish slide in outside the dead lever, the joint ring with the butt dish butt.
Through adopting above-mentioned technical scheme, the thread bush drives the joint ring and moves to the position with the butt of butt dish butt, and when joint ring and butt dish butt, under the effect that thread bush and first threaded rod threaded connection and joint ring and butt dish dragged each other this moment, the realization is to the fixed firm effect of longeron.
Optionally, a plurality of handles are fixedly connected to the outer walls of the threaded sleeve and the driving ring, and the length direction of the handles is arranged along the radial direction of the threaded sleeve or the driving ring.
Through adopting above-mentioned technical scheme, be convenient for drive the drive ring or the thread bush, promote work efficiency.
In summary, the present application includes at least one of the following beneficial technical effects:
1. after the road section and the number of the convenient beams are determined, the positions of the longitudinal beams are positioned, the longitudinal beams are anchored after the positioning is completed, the anchoring and stabilizing effect on the longitudinal beams is ensured, the cross beam is installed, the rail is ensured to be positioned in the positioning groove, the two clamping rods are controlled by the driving assembly to move relatively, the clamping blocks move to the side faces of the rail to abut against, the clamping and limiting effect on the rail is realized, and the clamping and fixing effect on the rail is ensured;
2. when the first expanding rod and the second expanding rod are positioned in the part with the large opening of the anchoring hole, the steel pipe pushes the sliding barrel to move downwards, the first expanding rod and the second expanding rod expand outwards towards the side wall of the anchoring hole, then concrete is poured towards the anchoring hole, and after concrete curing is finished, the anchoring work of the anchor rod is finished;
3. the thread bush drives the clamping ring to move to the position abutted with the abutting disc, and when the clamping ring is abutted with the abutting disc, under the mutual dragging effect of the thread bush and the first threaded rod in threaded connection and the clamping ring and the abutting disc, the fixing and stabilizing effect on the longitudinal beam is realized.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;
FIG. 2 is a schematic view of an anchoring device and a fixation device in an embodiment of the present application;
FIG. 3 is a front view of an embodiment of the present application;
fig. 4 is an enlarged view at a in fig. 1.
Reference numerals: 1. a stringer; 2. a cross beam; 3. positioning a groove; 4. a clamping and connecting rod; 5. a clamping block; 6. a double-headed threaded rod; 7. a slider; 8. a limiting rod; 9. a slide hole; 10. a screw; 11. a drive ring; 12. a transmission block; 13. a transmission groove; 14. an anchor rod; 15. a first spreader bar; 16. a second spreader bar; 17. a slide cylinder; 18. an anchoring hole; 19. a steel pipe; 20. fixing the rod; 21. a first threaded rod; 22. a threaded sleeve; 23. a snap ring; 24. a butting tray; 25. a handle.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses a construction method of a spliced railway construction boundary beam. Referring to fig. 1 and 2, the construction method of the spliced railway construction boundary beam comprises the following steps:
s1, preparing, namely determining and preparing the number of temporary beams according to the specific conditions of the road section, hollowing ballast in a sleeper box of the existing railway track at the erection position along the railway line, and adjusting the distance between sleepers;
referring to fig. 1 and 2, S2, positioning and fixing the longitudinal beam 1, determining the position of the longitudinal beam 1 and anchoring the longitudinal beam 1 to the ground according to the site construction condition; after the position of the longitudinal beam 1 is fixed, anchoring holes 18 are dug on the four side walls of the longitudinal beam 1, the section of the inner wall of each anchoring hole 18 is T-shaped, an anchoring device is arranged between the longitudinal beam 1 and the ground, the anchoring device comprises four anchor rods 14 and a plurality of first expansion rods 15, the anchor rod structure comprises a plurality of second expansion rods 16 and a sliding barrel 17, wherein four anchor rods 14 are respectively located in four anchoring holes 18, each anchor rod 14 corresponds to two first expansion rods 15 and two second expansion rods 16, the sliding barrel 17 is sleeved on the anchor rods 14 in a sliding mode, the outer wall of the sliding barrel 17 is hinged to one end of each first expansion rod 15, the other end of each first expansion rod 15 is hinged to one end of each second expansion rod 16, each second expansion rod 16 is hinged to the outer wall of the bottom end of each anchor rod 14, the first expansion rods 15 are hinged to the sliding barrel 17, the first expansion rods 15 are hinged to the second expansion rods 16, the second expansion rods 16 are hinged to the anchor rods 14 through hinge shafts, and the axis directions of the hinge shafts are horizontally arranged and perpendicular to the axis directions of the anchor rods 14.
Referring to fig. 1 and 2, the first expanding rod 15 and the second expanding rod 16 are located in a part with a large opening of the anchoring hole 18, the anchor rod 14 is provided with a power part for driving the first expanding rod 15 and the second expanding rod 16 to expand outward, the power part is set to be a steel pipe 19, the steel pipe 19 is sleeved outside the anchor rod 14 and is located above the sliding barrel 17, the bottom end of the steel pipe 19 is abutted to the top end of the sliding barrel 17, when the first expanding rod 15 and the second expanding rod 16 are located in the part with the large opening of the anchoring hole 18, the steel pipe 19 pushes the sliding barrel 17 to move downward, the first expanding rod 15 and the second expanding rod 16 expand outward towards the side wall of the anchoring hole 18, then concrete is poured into the anchoring hole 18, and after concrete curing is completed, the anchoring work of the anchor rod 14 is completed.
The fixing device is fixedly connected between the longitudinal beam 1 and the anchor rod 14, the fixing device comprises a fixing rod 20 and a threaded rod, the fixing rod 20 is fixedly connected with the top end of the longitudinal beam 1, a first threaded rod 21 is fixedly connected with the anchor rod 14, the fixing rod 20 is slidably sleeved with a threaded sleeve 22, the threaded sleeve 22 is in threaded connection with the first threaded rod 21, a clamping assembly is arranged between the fixing rod 20 and the threaded sleeve 22, the clamping assembly comprises a clamping ring 23 and a butting disc 24, the butting disc 24 is fixedly connected with one end, close to the first threaded rod 21, of the fixing rod 20, the clamping ring 23 is fixedly connected with one end, far away from the first threaded rod 21, of the threaded sleeve 22, the clamping ring 23 is sleeved outside the fixing rod 20, after the position of the longitudinal beam 1 is fixed, the butting disc 24 is abutted against the top end of the first threaded rod 21, a handle 25 is fixedly connected to the outer wall of the threaded sleeve 22, the handle 25 is arranged along the radial direction of the threaded sleeve 22, the handle 25 is used for applying acting force on the threaded sleeve 22 to enable the threaded sleeve 22 to rotate, the thread bush 22 drives the joint ring 23 and moves to the position of propping up with the butt joint dish 24 butt, and when joint ring 23 and butt joint dish 24 butt, under the effect that the thread bush 22 and first threaded rod 21 threaded connection and joint ring 23 and butt joint dish 24 drag each other this moment, the realization is to longeron 1's fixed firm effect.
Referring to fig. 1 and 3, S3, mounting the cross beams 2, wherein the positions of the mounting cross beams 2 are consistent with the positions of sleepers, the cross beams are arranged from two ends of the longitudinal beams 1 to the center, when the cross beams 2 are plugged in, positioning grooves 3 of the cross beams 2 are clamped below the track, the distance between the cross beams 2 is adjusted to be the same as and parallel to the distance between the sleepers, and ballast is backfilled; crossbeam 2 slides and is provided with two joint poles 4, 4 lifts and is provided with the joint piece 5 that is used for setting up on the track of joint pole, crossbeam 2 is provided with the drive assembly of two joint pole 4 relative motion of drive, drive assembly includes double threaded rod 6, two sliders 7 and locating part, double threaded rod 6 rotates with 2 lateral walls of crossbeam to be connected, the length direction of double threaded rod 6 is unanimous with 2 length direction of crossbeam, two sliders 7 respectively with two 4 fixed connection of joint poles, two sliders 7 respectively with the both ends screw fit of double threaded rod 6, the locating part is used for restricting slider 7 and rotates.
The locating part sets up to gag lever post 8, gag lever post 8 all is located same one side of crossbeam 2 with double threaded rod 6, 8 length direction of gag lever post are unanimous with double threaded rod 6's length direction, 8 length dimension of gag lever post equals double threaded rod 6's length dimension, 7 covers of slider are located outside gag lever post 8, when drive double threaded rod 6 rotates, this moment under gag lever post 8's limiting displacement, slider 7 moves along gag lever post 8's length direction, two joint piece 5 all move towards the direction of track this moment, the track sets up to the I shape, two joint piece 5 respectively with the both sides butt of track bottom this moment, the realization is to the tight effect of 3 interior track clamp of constant head tank.
Referring to fig. 3 and 4, in order to adjust the position of the clamping block 5, the clamping rod 4 is provided with a sliding hole 9, the clamping rod 4 is provided with a screw rod 10 in the sliding hole 9 in a sliding manner, the screw rod 10 is fixedly connected with one end of the clamping block 5, the clamping rod 4 is rotatably connected with a driving ring 11 at the opening of the sliding hole 9, the bottom of the driving ring 11 is fixedly connected with two rotating blocks, the top end of the clamping rod 4 is provided with a rotating hole, the inner wall of the rotating hole is arranged in a T shape, the rotating blocks are arranged in an L shape, the vertical section of each rotating block is fixedly connected with the end part of the driving ring 11, and the horizontal section of each rotating block rotates in a part with a large opening of the rotating hole, so that the effect of rotation between the driving ring 11 and the clamping rod 4 is realized;
S4, fixing the cross beam 2 and the side beam 1, and fixing the cross beam 2 and the side beam 1 by angle steel.
The implementation principle of the construction method of the spliced railway construction boundary beam in the embodiment of the application is as follows: after the position of the longitudinal beam 1 is positioned, excavating an anchoring hole 18, placing a first expanding rod 15 and a second expanding rod 16 in the anchoring hole 18, driving a sliding cylinder 17 to move downwards through a steel pipe 19, swinging the first expanding rod 15 and the second expanding rod 16 towards the side wall of the anchoring hole 18, pouring concrete towards the anchoring hole 18, and curing the concrete; the effect of fixing the longitudinal beam 1 is achieved through the threaded connection of the threaded sleeve 22 and the first threaded rod 21 and the mutual dragging of the clamping ring 23 and the abutting disc 24; in addition, after the track position is positioned in the groove 3, the double-threaded rod 6 is driven to rotate, the double-threaded rod 6 controls the two sliding blocks 7 to move relatively, and the sliding blocks 7 drive the clamping rod 4 to move towards the track; by rotating the driving ring 11, under the matching action of the driving block 12 and the driving groove 13, the clamping block 5 moves to clamp and limit the rail, and the clamping and fixing effect on the rail is ensured.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A construction method of a spliced railway construction boundary beam is characterized by comprising the following steps: the method comprises the following steps:
s1, preparing, namely determining and preparing the number of temporary beams according to the specific conditions of the road section, hollowing ballast in a sleeper box of the existing railway track at the erection position along the railway line, and adjusting the distance between sleepers;
s2, positioning and fixing the longitudinal beam (1), determining the position of the longitudinal beam (1) and anchoring the longitudinal beam (1) with the ground according to the site construction condition;
s3, mounting a cross beam (2), wherein the position of the mounting cross beam (2) is consistent with that of a sleeper, the cross beam is arranged from two ends of a longitudinal beam (1) to the center, when the cross beam (2) is plugged, a positioning groove (3) of the cross beam (2) is clamped below a track, the distance between the cross beam (2) is adjusted to be the same as and parallel to the distance between sleepers, and ballast is backfilled;
s4, fixing the cross beam (2) and the longitudinal beam (1), and fixing the cross beam (2) and the longitudinal beam (1);
the S3 middle cross beam (2) is provided with two clamping rods (4) in a sliding mode, the clamping rods (4) are provided with clamping blocks (5) used for being erected on a track in a lifting mode, and the cross beam (2) is provided with a driving assembly for driving the two clamping rods (4) to move relatively.
2. The spliced railway construction boundary beam construction method of claim 1, characterized in that: drive assembly includes double threaded rod (6), two slider (7) and locating part, double threaded rod (6) with crossbeam (2) lateral wall rotates to be connected, the both ends of double threaded rod (6) respectively with two slider (7) screw-thread fit, slider (7) with crossbeam (2) sliding connection, just slider (7) with joint rod (4) fixed connection, the locating part is used for the restriction slider (7) rotate.
3. The spliced railway construction boundary beam construction method of claim 2, characterized in that: the locating part sets up to gag lever post (8), gag lever post (8) with double-end threaded rod (6) are located same one side of crossbeam (2), gag lever post (8) with crossbeam (2) fixed connection, slider (7) cover is located outside gag lever post (8).
4. The spliced railway construction boundary beam construction method of claim 2, characterized in that: the clamping rod (4) is provided with a sliding hole (9), the clamping rod (4) is provided with a screw rod (10) in the sliding hole (9) in a sliding mode, the screw rod (10) is fixedly connected with the clamping block (5), the clamping rod (4) is rotatably connected with a driving ring (11) at the opening of the sliding hole (9), the driving ring (11) is in threaded connection with the screw rod (10), and the clamping rod (4) is provided with a transmission piece for limiting the rotation of the screw rod (10).
5. The spliced railway construction boundary beam construction method of claim 4, characterized in that: the transmission part is set as a transmission block (12), the transmission block (12) is fixedly connected with the inner wall of the sliding hole (9), a transmission groove (13) is formed in the peripheral wall of the screw rod (10), the transmission groove (13) is arranged along the axis direction of the screw rod (10) and the two ends of the screw rod are arranged in a closed mode, and the transmission block (12) is connected in the transmission groove (13) in a sliding mode.
6. The spliced railway construction boundary beam construction method of claim 1, characterized in that: the longitudinal beam (1) and the ground are provided with an anchoring device, the anchoring device comprises a plurality of anchor rods (14), a plurality of first expansion rods (15), a plurality of second expansion rods (16) and a sliding barrel (17), an anchoring hole (18) is formed in the ground, the cross section of the inner wall of the anchoring hole (18) is in a T shape, the first expansion rod (15) is hinged to the outer wall of the sliding barrel (17), the other end of the first expansion rod (15) is hinged to one end of the second expansion rod (16), one end of the second expansion rod (16) is hinged to the outer wall of the bottom end of the anchor rod (14), the first expansion rod (15) and the second expansion rod (16) are located in the part with the large opening of the anchoring hole (18), the sliding barrel (17) is sleeved and slid outside the anchor rods (14), and the anchor rods (14) are provided with power pieces for driving the first expansion rods (15) and the second expansion rods (16) to expand outwards, and a fixing device is fixedly connected between the longitudinal beam (1) and the anchor rod (14).
7. The spliced railway construction boundary beam construction method of claim 6, wherein: the power part sets up to steel pipe (19), steel pipe (19) cover is located outside stock (14) and be located slide cartridge (17) top, steel pipe (19) bottom with slide cartridge (17) upper end butt.
8. The spliced railway construction boundary beam construction method of claim 6, wherein: fixing device includes dead lever (20) and first threaded rod (21), first threaded rod (21) with stock (14) top fixed connection, dead lever (20) with longeron (1) lateral wall fixed connection, the cover that slides of dead lever (20) is equipped with thread bush (22), thread bush (22) with first threaded rod (21) threaded connection, dead lever (20) with be provided with the joint subassembly between thread bush (22).
9. The spliced railway construction boundary beam construction method of claim 8, characterized in that: the joint subassembly includes joint ring (23) and butt dish (24), butt dish (24) with dead lever (20) are close to in the one end fixed connection of first threaded rod (21), joint ring (23) with thread bush (22) are kept away from in the one end fixed connection of first threaded rod (21), slide in outside dead lever (20) is established to joint ring (23) cover, joint ring (23) with butt dish (24) butt.
10. The spliced railway construction boundary beam construction method of claim 4 or 8, characterized in that: the outer walls of the threaded sleeve (22) and the driving ring (11) are fixedly connected with a plurality of handles (25), and the length direction of each handle (25) is arranged along the radial direction of the threaded sleeve (22) or the driving ring (11).
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| CN107989037A (en) * | 2018-01-17 | 2018-05-04 | 上海智平基础工程有限公司 | A kind of enlarged footing anchor structure |
| CN110629684A (en) * | 2018-06-22 | 2019-12-31 | 郑州中原铁道工程有限责任公司 | Construction method for spliced railway construction temporary beam |
| CN213708989U (en) * | 2020-09-28 | 2021-07-16 | 房明贤 | Side hanging type insulating rail fastener |
| CN213867117U (en) * | 2020-09-29 | 2021-08-03 | 太仓中博铁路紧固件有限公司 | Railway steel rail insulating fastener |
| CN113685054A (en) * | 2021-08-25 | 2021-11-23 | 重庆市渝海建设(集团)有限公司 | Floor slab crack structure and processing method thereof |
| CN113756345A (en) * | 2021-09-25 | 2021-12-07 | 聊城市交通发展有限公司 | Construction method of underwater bridge foundation |
| CN113756205A (en) * | 2021-09-30 | 2021-12-07 | 蓝海建设集团有限公司 | Adjustable pier stud steel bar protection layer structure |
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Application publication date: 20220412 |