CN115014285A - Settlement degree measuring device for bridge construction - Google Patents
Settlement degree measuring device for bridge construction Download PDFInfo
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- CN115014285A CN115014285A CN202210941026.0A CN202210941026A CN115014285A CN 115014285 A CN115014285 A CN 115014285A CN 202210941026 A CN202210941026 A CN 202210941026A CN 115014285 A CN115014285 A CN 115014285A
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- slide rail
- bridge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
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Abstract
The invention discloses a settlement measuring device for bridge construction, which comprises a bridge pier and a lower slide rail arranged on the ground on the outer peripheral surface of the bridge pier, wherein an upper slide rail is fixedly arranged on the outer peripheral surface of the bridge pier close to the right above the lower slide rail, the lower slide rail is parallel to the upper slide rail, the lower slide rail and the upper slide rail are buckled on the bridge pier, the lower slide rail and the upper slide rail are arranged oppositely, the outer peripheral surface of the upper slide rail is uniformly and fixedly connected with a plurality of fixed guide cylinders, the outer peripheral surface of the lower slide rail is uniformly and fixedly provided with a plurality of guide installation parts of which the top ends are slidably connected on the fixed guide cylinders, and the settlement measuring device for bridge construction can detect the sinking number and the highest bottom number of the bridge pier through the arrangement of a telescopic measuring rod, a degree adjusting part, a measuring angle plate and the guide installation parts, meanwhile, the real inclination angle of the bridge pier can be detected.
Description
Technical Field
The invention relates to the technical field of bridge settlement measurement, in particular to a settlement measuring device for bridge construction.
Background
With the rapid advance of traffic infrastructure, a plurality of bridges are built in various places throughout the country. Because of wide breadth of our country and complex geological conditions, various foundation settlement problems often occur. Factors such as complex geological conditions of bridge sites, uneven load of upper structures and the like can cause uneven settlement of bridge structure foundations, so that some components are cracked and even damaged. When the bridge is designed, a settlement mark is established at a proper position of the pier body and is used for periodically detecting and monitoring the state of the bridge and reducing the structural risk caused by settlement, so that the settlement degree of the bridge pier needs to be measured.
For example, a settlement measuring device for bridge design with application number CN202111540967.5 belongs to the technical field of bridge settlement measurement. A settlement measuring device for bridge design comprises a settlement plate arranged on the bottom surface of a settlement mark, a pressure stabilizing support mechanism, a levelness measuring mechanism and a settlement monitoring mechanism, wherein a dustproof box is arranged on the outer side of the settlement plate, the pressure stabilizing support mechanism is arranged at four corners of the bottom surface of the settlement plate, and the levelness measuring mechanism is arranged on the pressure stabilizing support mechanism; the settlement monitoring mechanism is arranged below the settlement plate. According to the invention, a supported settlement plate is arranged around the settlement mark of the pier body of the bridge, the center of the settlement plate is opposite to the settlement mark, a settlement monitoring mechanism is arranged below the settlement plate, so that the descending data of the settlement plate can be monitored for a long time, the settlement of the bridge is obtained, the settlement plate is supported by uniformly distributed pressure stabilizing supporting mechanisms, a levelness measuring mechanism is arranged on the pressure stabilizing supporting mechanism to monitor whether the settlement plate is inclined or not, and the inclination deviation direction and data of the pier body are obtained.
Although the device can detect the bridge pier, the detection position is relatively fixed, but the direction of the bridge pier is uncertain when the bridge pier is inclined, so the inclination data detected by the detection device is often inaccurate.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a settlement measuring device for bridge construction, which solves the problems in the background technology.
The technical scheme of the invention is as follows:
in order to realize the purpose, the invention is realized by the following technical scheme: a settlement measuring device for bridge construction comprises a bridge pier and a lower slide rail arranged on the ground of the outer peripheral surface of the bridge pier, wherein an upper slide rail is fixedly arranged right above the outer peripheral surface of the bridge pier close to the lower slide rail, the lower slide rail is parallel to the upper slide rail, the lower slide rail and the upper slide rail are buckled on the bridge pier, the lower slide rail and the upper slide rail are arranged oppositely, the outer peripheral surface of the upper slide rail is uniformly and fixedly connected with a plurality of fixed guide cylinders, the outer peripheral surface of the lower slide rail is uniformly and fixedly provided with a plurality of guide installation parts with top ends connected to the fixed guide cylinders in a sliding manner, sliders capable of rotating around the axes of the lower slide rail and the upper slide rail are arranged in the lower slide rail, a telescopic measuring rod for measuring the distance between the upper slide rail and the lower slide rail is arranged on the upper slide rail, and the top end of the telescopic measuring rod is fixedly connected to the sliders in the upper slide rail, the bottom of flexible measuring stick articulates there is the angular adjustment part that circumference both ends homoenergetic butt is on the bridge mound, the bottom fixed mounting of flexible measuring stick can adjust its volume scute that shows the angle degree with the cooperation of angular adjustment part, the upper surface of going up the slide rail is even is provided with a plurality of conflict stabilizing part.
Optionally, the direction installation part includes the guide support post of fixed connection at lower slide rail outer peripheral face, sliding connection has the direction to adjust the bucket about the top of guide support post, the bottom of direction adjustment bucket is provided with the one end and runs through the stable bolt of direction adjustment bucket and guide support post, just the one end threaded connection who stabilizes the bolt and is close to the bridge mound has the nut.
Optionally, the telescopic measuring rod comprises a guide support measuring column fixedly connected to the sliding block in the upper sliding rail, the top end of the guide support measuring column is connected with a measuring barrel in an up-down sliding manner, the upper surface of the measuring barrel is rotatably connected with a fixed connecting rod, and the top end of the fixed connecting rod is fixedly connected to the sliding block in the upper sliding rail.
Optionally, the angle adjustment part includes that fixed connection supports the pivot of measuring post bottom at the direction, the middle part of pivot is rotated and is connected with the slope adjusting plate, the center fixedly connected with scale of direction support measuring post one side is kept away from to the slope adjusting plate, just the bottom of scale is rotated and is connected in the pivot, the one end fixedly connected with scute of direction support measuring post is kept away from in the pivot, the both ends of slope adjusting plate circumference all are provided with the butt stabilizing part that one end can the butt on the bridge mound.
Optionally, the butt stabilizing part includes the supplementary fixed block of fixed connection at slope adjusting plate circumference both ends, the one end sliding connection that supplementary fixed block is close to the bridge mound has the slope roof, one side threaded connection that supplementary fixed block kept away from the bridge mound has one end to rotate the drive bolt of connection on the slope roof, one side rotation that the slope roof is close to the bridge mound is connected with the surface can the butt supplementary ball on the bridge mound.
Optionally, the bottom end of the fixed connecting rod is fixedly connected with a ball head, the ball head is rotatably connected to the measuring barrel, and an exhaust port communicated with the inside of the measuring barrel is formed in the top end of the outer peripheral surface of the measuring barrel.
Optionally, the conflict stabilizing part includes a plurality of extrusion fixed plates of even fixed connection at last slide rail upper surface, one side threaded connection that extrusion fixed plate kept away from the bridge mound has one end can the butt at bridge mound extrusion adjustment bolt.
Advantageous effects
The invention provides a settlement measuring device for bridge construction, which has the following beneficial effects:
this a settlement measuring device for bridge construction, through the setting of flexible measuring stick, degree adjustment part, angulation board and direction installation component, can make personnel when measuring bridge mound settlement data, can detect out the bridge mound and sink the number and count with the highest bottom, can detect out the true inclination of its bridge mound simultaneously.
Drawings
FIG. 1 is a schematic cross-sectional view of the front view of the present invention;
FIG. 2 is a schematic top view of the tilt adjustment plate of the present invention;
FIG. 3 is an enlarged schematic view of FIG. 2 at A in accordance with the present invention;
FIG. 4 is a schematic bottom view of the lower slide rail of the present invention;
FIG. 5 is an enlarged view of the structure of FIG. 1 at B;
fig. 6 is a schematic view of the structure of the guiding adjustment barrel matched with the guiding support column.
In the figure: 1. bridge piers; 2. a lower slide rail; 3. an upper slide rail; 4. a guide support measuring column; 5. a measuring barrel; 6. a fixed connecting rod; 7. a angle measuring plate; 8. a tilt adjustment plate; 9. a graduated scale; 10. a guiding support column; 11. an auxiliary fixing block; 12. stabilizing the plug; 13. a guiding adjustment barrel; 14. fixing a guide cylinder; 15. extruding the adjusting bolt; 16. extruding the fixed plate; 17. an inclined top plate; 18. an auxiliary ball; 19. a drive bolt; 20. a rotating shaft.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1 to 6, the present invention provides a technical solution: a settlement measuring device for bridge construction comprises a bridge pier 1 and a lower slide rail 2 arranged on the ground on the outer peripheral surface of the bridge pier 1, an upper slide rail 3 is fixedly arranged on the outer peripheral surface of the bridge pier 1 close to the right above the lower slide rail 2, the lower slide rail 2 is parallel to the upper slide rail 3, the lower slide rail 2 and the upper slide rail 3 are both buckled on the bridge pier 1, as shown in figure 4, and the lower slide rail 2 and the upper slide rail 3 are even in the prior art, so detailed description is not repeated, wherein the lower slide rail 2 is only arranged on the ground, the lower slide rail 2 cannot touch the bridge pier 1, meanwhile, the ground is subjected to settlement-preventing reinforcement arrangement, the lower slide rail 2 and the upper slide rail 3 are oppositely arranged, a plurality of fixed guide cylinders 14 are uniformly and fixedly connected on the outer peripheral surface of the upper slide rail 3, and a plurality of guide installation components with the top ends which are slidably connected on the fixed guide cylinders 14 are uniformly and fixedly arranged on the outer peripheral surface of the lower slide rail 2, all be provided with in lower slide rail 2 and the last slide rail 3 and can center on its axle center pivoted slider, slider upper surface in the lower slide rail 2 is provided with the flexible measuring stick that is used for measuring the distance between last slide rail 3 and the lower slide rail 2, and the top fixed connection of flexible measuring stick is on the slider in last slide rail 3, the bottom of flexible measuring stick articulates there is the angular adjustment part that circumference both ends all can the butt on bridge mound 1, the bottom fixed mounting of flexible measuring stick can adjust its quantity of measurement angle 7 that shows the angle degree with the angular adjustment part cooperation, through flexible measuring stick, the degree adjustment part, the setting of quantity of measurement angle board 7 and direction installation part, can make personnel when measuring bridge mound 1 settlement degree data, can detect out bridge mound 1 settlement number and the highest base number, can detect out the true inclination of its bridge mound 1 simultaneously.
The direction installation part includes the guide support post 10 of fixed connection at 2 outer peripheral faces of lower slide rail, sliding connection has direction adjustment bucket 13 about the top of guide support post 10, the bottom of direction adjustment bucket 13 is provided with the one end and runs through the stable 12 of tying of direction adjustment bucket 13 and guide support post 10, and the one end threaded connection who stabilizes 12 and is close to bridge mound 1 has the nut, consequently, personnel are when installing slide rail 3, can be parallel and the stability that corresponds with lower slide rail 2 on bridge mound 1, personnel rotate extrusion adjustment bolt 15 simultaneously and can stabilize last slide rail 3 on bridge mound 1.
The flexible measuring stick includes that fixed connection supports measuring column 4 at the direction on the slide block in slide rail 2 down, sliding connection has measuring barrel 5 about the top of measuring column 4 is supported in the direction, measuring barrel 5's upper surface rotates and is connected with fixed link rod 6, and fixed link rod 6's top fixed connection is on the slider in last slide rail 3, consequently, personnel are when rotating direction support measuring column 4, measuring barrel 5 can be followed the direction and supported measuring column 4 and rotate together, when the slope takes place at bridge mound 1 simultaneously, it also can take place the slope to go up slide rail 3, so when direction support measuring column 4 rotates the round, can appear two data of highest point and minimum on measuring barrel 5.
The angle adjusting component comprises a rotating shaft 20 fixedly connected with the bottom end of the guide support measuring column 4, the middle part of the rotating shaft 20 is rotatably connected with an inclined adjusting plate 8, the center of one side of the inclined adjusting plate 8 far away from the guide support measuring column 4 is fixedly connected with a graduated scale 9, and the bottom end of the graduated scale 9 is rotatably connected on the rotating shaft 20, and one end of the rotating shaft 20 far away from the guide support measuring column 4 is fixedly connected with the angle measuring plate 7, so that when the bridge pier 1 is inclined, the inclination adjusting plate 8 is driven to be synchronous, so that when the person drives the guide support measuring column 4 to rotate for one circle, the inclination adjusting plate 8 drives the graduated scale 9 to have a maximum inclination angle, therefore, the scale 9 can display the maximum rotation angle on the angle plate 7 when the maximum inclination occurs, and the inclination adjustment plate 8 is provided with an abutment stabilizing member at both circumferential ends thereof, one end of which can abut against the bridge pier 1.
The abutting stabilizing component comprises auxiliary fixing blocks 11 fixedly connected to the two circumferential ends of the inclined adjusting plate 8, one end, close to the bridge pier 1, of each auxiliary fixing block 11 is connected with an inclined top plate 17 in a sliding mode, one side, far away from the bridge pier 1, of each auxiliary fixing block 11 is in threaded connection with a driving bolt 19, one end of each driving bolt is connected to the inclined top plate 17 in a rotating mode, one side, close to the bridge pier 1, of each inclined top plate 17 is connected with an auxiliary ball 18, the outer surface of each auxiliary ball can abut against the bridge pier 1 in a rotating mode, when stabilizing the tilt adjusting plate 8 on the bridge pier 1, the person is therefore required to turn the drive bolt 19, so that the inclined top plate 17 can be urged to abut against the bridge pier 1 with the auxiliary balls 18, so that, in the event of a deflection of the bridge pier 1, the inclination adjustment plate 8 can be inclined therewith, at the same time, because of the arrangement of the auxiliary balls 18, the bridge pier 1 does not move with the inclination adjustment plate 8 when moving downward.
The bottom fixedly connected with bulb of fixed link 6, the bulb rotates to be connected on measuring bucket 5, and the gas vent rather than inside intercommunication is seted up on the top of the outer peripheral face of measuring bucket 5.
Conflict stabilizing means includes a plurality of extrusion fixed plate 16 of even fixed connection at last slide rail 3 upper surface, and one side threaded connection that extrusion fixed plate 16 kept away from bridge mound 1 has one end can the butt at bridge mound 1 extrusion adjustment bolt 15, therefore the personnel only need rotate extrusion adjustment bolt 15 when stabilizing last slide rail 3 on bridge mound 1, impel extrusion adjustment bolt 15 to contradict on bridge mound 1 to slide rail 3 is stabilized on bridge mound 1 on coming the bar.
To sum up, when the device for measuring the degree of settlement for bridge construction is used, the lower slide rail 2 needs to be installed on the ground, and simultaneously, through the arrangement of the guide support pillar 10 and the guide adjusting barrel 13, a person only needs to rotate the extrusion adjusting bolt 15 to stabilize the upper slide rail 3 on the bridge pier 1, so that the graduated scale 9 and the extrusion adjusting bolt 15 are both at initial positions, then when the person needs to measure the degree of settlement, the person needs to rotate the guide support measuring pillar 4 around the bridge pier 1 for one circle, when the person rotates the guide support measuring pillar 4, if the bridge pier 1 is inclined, the guide support measuring pillar 4 will have two data of the highest point and the lowest point in the measuring barrel 5, and simultaneously before the person rotates the guide support measuring pillar 4, the displacement of the guide support measuring pillar 4 in the measuring barrel 5 is the descending data of the whole bridge pier 1, and when the person rotates the guide support measuring pillar 4, the scale 9 on the angle measuring plate 7 has a maximum rotation amount, so that the maximum inclination angle data of the bridge pier 1 is obtained.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (7)
1. The utility model provides a settlement measuring device for bridge construction, includes bridge mound (1) and lower slide rail (2) of setting on bridge mound (1) outer peripheral face, bridge mound (1) outer peripheral face is close to slide rail (2) down directly over fixed mounting have last slide rail (3), and slide rail (2) parallel with last slide rail (3) down, just slide rail (2) all are the lock on bridge mound (1) with last slide rail (3) down, and slide rail (2) set up its characterized in that with last slide rail (3) relatively down: the bridge pier angle measuring device is characterized in that a plurality of fixed guide cylinders (14) are fixedly connected to the outer peripheral surface of the upper slide rail (3) uniformly, a plurality of guide installation parts with the top ends connected to the fixed guide cylinders (14) in a sliding mode are fixedly installed on the outer peripheral surface of the lower slide rail (2) uniformly, sliders capable of rotating around the axes of the lower slide rail (2) and the upper slide rail (3) are arranged in the lower slide rail (2), a telescopic measuring rod used for measuring the distance between the upper slide rail (3) and the lower slide rail (2) is arranged on the upper surface of each slider in the lower slide rail (2), the top end of the telescopic measuring rod is fixedly connected to the sliders in the upper slide rail (3), the bottom end of the telescopic measuring rod is hinged with an angle adjusting part, the two circumferential ends of the angle adjusting part can be abutted to the bridge pier (1), and a measuring angle plate (7) capable of being matched with the angle adjusting part to adjust the angle displaying degree of the angle adjusting part is fixedly installed at the bottom end of the telescopic measuring rod, the upper surface of going up slide rail (3) is even is provided with a plurality of stable parts of contradicting.
2. The settlement measuring device for bridge construction according to claim 1, wherein: the direction installation part includes guide support post (10) of fixed connection at lower slide rail (2) outer peripheral face, sliding connection has direction adjustment bucket (13) about the top of guide support post (10), the bottom of direction adjustment bucket (13) is provided with one end and runs through stable bolt (12) of direction adjustment bucket (13) and guide support post (10), just it has the nut to stabilize one end threaded connection that bolt (12) is close to bridge mound (1).
3. The settlement measuring device for bridge construction according to claim 1, wherein: the telescopic measuring rod comprises a guide support measuring column (4) fixedly connected to a sliding block in the upper sliding rail (3), the top end of the guide support measuring column (4) is connected with a measuring barrel (5) in a vertical sliding mode, the upper surface of the measuring barrel (5) is rotatably connected with a fixed connecting rod (6), and the top end of the fixed connecting rod (6) is fixedly connected to the sliding block in the upper sliding rail (3).
4. The settlement measuring device for bridge construction according to claim 1, wherein: the angle adjustment part includes pivot (20) of fixed connection in the direction support measurement post (4) bottom, the middle part of pivot (20) is rotated and is connected with slope adjusting plate (8), center fixedly connected with scale (9) of direction support measurement post (4) one side are kept away from in slope adjusting plate (8), just the bottom of scale (9) is rotated and is connected in pivot (20), one end fixedly connected with angle gage board (7) of direction support measurement post (4) are kept away from in pivot (20), the both ends of slope adjusting plate (8) circumference all are provided with the butt stabilizing means of one end can butt on bridge mound (1).
5. The settlement measuring device for bridge construction according to claim 4, wherein: the butt stabilizing part includes auxiliary fixed block (11) of fixed connection at slope adjusting plate (8) circumference both ends, the one end sliding connection that auxiliary fixed block (11) are close to bridge mound (1) has slope roof (17), one side threaded connection that bridge mound (1) were kept away from in auxiliary fixed block (11) has one end to rotate drive bolt (19) of connection on slope roof (17), one side rotation that slope roof (17) are close to bridge mound (1) is connected with surface can butt auxiliary ball (18) on bridge mound (1).
6. The settlement measuring device for bridge construction according to claim 3, wherein: the bottom end of the fixed connecting rod (6) is fixedly connected with a ball head, the ball head is rotatably connected to the measuring barrel (5), and the top end of the outer peripheral surface of the measuring barrel (5) is provided with an exhaust port communicated with the inside of the measuring barrel.
7. The settlement measuring device for bridge construction according to claim 1, wherein: conflict stabilizing means includes a plurality of extrusion fixed plate (16) of even fixed connection at last slide rail (3) upper surface, one side threaded connection that extrusion fixed plate (16) kept away from bridge mound (1) has one end can the butt at bridge mound (1) extrusion adjustment bolt (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210941026.0A CN115014285B (en) | 2022-08-08 | 2022-08-08 | Settlement degree measuring device for bridge construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210941026.0A CN115014285B (en) | 2022-08-08 | 2022-08-08 | Settlement degree measuring device for bridge construction |
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| Publication Number | Publication Date |
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| CN115014285A true CN115014285A (en) | 2022-09-06 |
| CN115014285B CN115014285B (en) | 2022-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210941026.0A Active CN115014285B (en) | 2022-08-08 | 2022-08-08 | Settlement degree measuring device for bridge construction |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116697983A (en) * | 2023-08-09 | 2023-09-05 | 陕西建一建设有限公司 | Concrete bridge subsides detection device |
| CN116839541A (en) * | 2023-08-29 | 2023-10-03 | 西南交通建设集团股份有限公司 | Settlement degree measuring device for bridge construction |
| CN117308872A (en) * | 2023-10-27 | 2023-12-29 | 山东铁鹰建设工程有限公司 | Settlement degree measuring device for bridge construction |
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| JP2005181176A (en) * | 2003-12-22 | 2005-07-07 | Chishitsu Gijutsu Jimusho:Kk | Inclination measuring device and ground displacement monitoring apparatus |
| CN103185565A (en) * | 2011-12-30 | 2013-07-03 | 中国石油天然气股份有限公司 | Oil-gas pipeline deformation detection verification test method and device |
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| CN211178414U (en) * | 2020-01-12 | 2020-08-04 | 湖北德高工程质量检测有限公司 | Highway bridge subsides detection device |
| CN114234913A (en) * | 2021-12-16 | 2022-03-25 | 吴巨军 | Settlement degree measuring device for bridge design |
| CN216694970U (en) * | 2022-02-12 | 2022-06-07 | 汉中市公路局 | Highway bridge subsides detection device |
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2022
- 2022-08-08 CN CN202210941026.0A patent/CN115014285B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005181176A (en) * | 2003-12-22 | 2005-07-07 | Chishitsu Gijutsu Jimusho:Kk | Inclination measuring device and ground displacement monitoring apparatus |
| CN103185565A (en) * | 2011-12-30 | 2013-07-03 | 中国石油天然气股份有限公司 | Oil-gas pipeline deformation detection verification test method and device |
| CN110319809A (en) * | 2019-07-16 | 2019-10-11 | 江西省水利厅工程建设稽察事务中心 | The wire type monitoring device and its monitoring method with appearance are seen in dam |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116697983A (en) * | 2023-08-09 | 2023-09-05 | 陕西建一建设有限公司 | Concrete bridge subsides detection device |
| CN116697983B (en) * | 2023-08-09 | 2023-10-10 | 陕西建一建设有限公司 | Concrete bridge subsides detection device |
| CN116839541A (en) * | 2023-08-29 | 2023-10-03 | 西南交通建设集团股份有限公司 | Settlement degree measuring device for bridge construction |
| CN116839541B (en) * | 2023-08-29 | 2023-11-10 | 西南交通建设集团股份有限公司 | Settlement degree measuring device for bridge construction |
| CN117308872A (en) * | 2023-10-27 | 2023-12-29 | 山东铁鹰建设工程有限公司 | Settlement degree measuring device for bridge construction |
| CN117308872B (en) * | 2023-10-27 | 2024-05-14 | 山东铁鹰建设工程有限公司 | Settlement degree measuring device for bridge construction |
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| CN115014285B (en) | 2022-10-14 |
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