Road and bridge construction surveying device

Abstract

The application relates to the technical field of laser measuring instruments, and discloses a road and bridge construction measuring device, wherein the adapting mechanism comprises a hinge base, the hinge base is in sliding connection with a stand, a flat plate is hingedly connected to the bottom of the hinge base, an electromagnetic strip is fixedly arranged on the lower side edge of the flat plate, a through opening is formed in the middle of the flat plate, side plates are arranged on the sides of the flat plate and located on the side edges of the through opening, a linear driving part II is arranged on one side of each side plate, a driving seat is slidably arranged on the flat plate and screwed with the linear driving part II, a top head is fixedly mounted on the side surface of the driving seat, and a magnetic attraction frame is fixedly mounted on the side of each side plate which is close to the other side plate; according to the special inclined structure of the T-shaped beam, the heights of multiple corrugated pipes can be synchronously measured, the measuring structure does not need to be frequently adjusted during processing, and the measuring efficiency is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of laser measuring instrument technology, specifically to a road and bridge construction measuring device. Background Technology

[0002] Road and bridge engineering comprises four major components: roadbed, pavement, bridge, and ancillary facilities. Most of the work is carried out in the open field and is greatly affected by terrain, geology, weather, and traffic. Construction follows the principles of underground construction first, above-ground construction first, main structure first, and ancillary construction first, and segmented and continuous construction. The core guarantee is structural safety, smooth alignment, service life, and traffic safety. A type of T-beam commonly used in road and bridge construction requires corrugated pipes to be installed on both sides during construction. The height of the top or center of the pipes directly determines the shape of the prestressed tendons. Height deviations can alter the beam's stress, increase tension friction, and even cause problems such as cracking and abnormal cambering. This is a core, hidden process in T-beam prefabrication. Multiple corrugated pipes are set at various heights along the length of the T-beam, and the spacing between each pipe varies depending on its height. Therefore, after the corrugated pipes are positioned, the height and spacing of each pipe need to be verified when measuring their height. In existing technologies, because the T-beam is inclined on both sides, the corrugated pipes also need to be inclined, making measurement inconvenient. Furthermore, the handheld measuring devices used in existing technologies require frequent adjustments to measure each corrugated pipe, resulting in cumbersome operation, inability to perform batch measurements, and low operational efficiency. To address these shortcomings, this invention proposes a road and bridge construction measuring device. Summary of the Invention

[0003] The purpose of this invention is to provide a road and bridge construction surveying device to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: it includes a support mechanism, the support mechanism includes a frame, the bottom of the frame is provided with a traveling wheel, the top of the frame is horizontally provided with a linear drive unit, and an adapter mechanism is provided on the frame through the linear drive unit. The adapter mechanism includes a hinge base, which is slidably connected to the upright frame. A flat plate is hinged to the bottom of the hinge base. An electromagnetic strip is fixedly installed on the lower side of the flat plate. An opening is provided through the middle of the flat plate. Side plates are provided on both sides of the flat plate at the side of the opening. A linear drive unit is provided on one side of the side plate. A drive seat that is screwed to the linear drive unit is slidably installed on the flat plate. A top head is fixedly installed on the side of the drive seat. A magnetic suction frame is fixedly installed on the side of the side plates that are close to each other. A docking mechanism for connecting the top head; A measurement auxiliary mechanism for returning the laser beam; A leveling control mechanism, used to control the measurement auxiliary mechanism to perform leveling; A propulsion mechanism is used to control the measurement auxiliary mechanism to pass through the T-beam template; A measuring mechanism for performing batch measurements.

[0004] The docking mechanism includes a movable seat slidably disposed in the middle of the plate, and several movable seats are provided. A movable frame is slidably disposed on one side of the surface of the movable seat. A wedge is slidably disposed inside the movable frame. The surface of the wedge abuts against the top head. The wedge is elastically telescopically disposed on the movable frame. A contact shaft is fixedly connected to the surface of the wedge. An elastic element is movably sleeved on the wedge. The two ends of the elastic element abut against the wedge and the movable frame, respectively.

[0005] A wedge plate is provided on one side of the movable seat above the touch shaft, and the surface of the wedge plate abuts against the surface of the touch shaft. An electromagnet is fixedly connected to the other side of the movable seat, and the electromagnet is movably connected to the magnetic suction frame. A torsion spring is installed on one side of the axis of the movable seat.

[0006] The measuring auxiliary mechanism includes a rotating frame rotatably mounted at the axis of the movable seat. A torsion spring is abutted on one side of the rotating frame. An extension plate is fixedly connected to the top of the rotating frame. A spring frame is provided between the inner end of the extension plate and the rotating frame. A blocking plate is slidably mounted on the spring frame. One end of the blocking plate passes through the rotating frame and is slidably connected to it. The end of the blocking plate away from the rotating frame abuts against the spring on the spring frame.

[0007] Several baffle plates are adapted to the movable seat. The second and third baffle plates, arranged from top to bottom, are respectively provided with a first through-hole and a second through-hole. The horizontal depth of the second through-hole is greater than that of the first through-hole. A push shaft is fixedly connected to the side of one end of the baffle plate.

[0008] A turntable is provided on the movable base near the electromagnet. The turntable is rotatably connected to the movable base. A dial is fixedly installed on the surface of the turntable off-center. A conical wheel set is connected to one side of the turntable relative to the dial. A gear is fixedly connected to the side of the conical wheel set. A T-shaped rack that is slidably connected to the top of the gear is engaged with the top of the gear.

[0009] A towing frame abuts against the T-shaped rack, and the T-shaped rack is slidably connected to the towing frame. Both ends of the towing frame pass through the side plate and are slidably connected to it. A rotating arm is hinged below the connection point between the side plate and the towing frame. The two ends of the towing frame are slidably disposed inside the rotating arm. A connecting shaft passing through the side plate is fixedly connected between the two rotating arms. One end of the connecting shaft passes through the rotating arm and is connected to a power unit.

[0010] The propulsion mechanism includes symmetrically arranged support frames on the side of the side plate. A second power unit is connected to the side of one of the support frames. A lead screw is rotatably mounted on the support frame. The bottom of one of the lead screws is connected to the second power unit. A pulley set is connected to the top of the lead screw. A propulsion frame is screwed onto the lead screw. The propulsion frame abuts against the propulsion shaft.

[0011] The measuring mechanism includes an adjusting slide rail, which is located on one side of the bottom of the stand. A mounting block is driven on the adjusting slide rail, and a plurality of laser probes are linearly arrayed on the top of the mounting block. The laser probes are respectively positioned according to the positions of the second through-hole, the first through-hole, and the topmost blocking plate.

[0012] The first opening is close to the corresponding propulsion shaft, and the second opening is far away from the corresponding propulsion shaft.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: In this invention, the flat plate is attached to the inclined inner surface of the T-beam template. The linear drive unit controls the movement of the docking mechanism by pressing the pre-positioned position of the corrugated pipe. The electromagnet and magnetic suction frame limit the measurement auxiliary mechanism. After the docking mechanism is positioned, the drag frame is pulled out to make the measurement auxiliary mechanism set in a horizontal state. Then, the push mechanism pushes the blocking plate through the T-beam template to position the top height of each corresponding corrugated pipe. Based on the measuring mechanism, the first through-hole, the second through-hole, and the top blocking plate, the beam of the first laser probe passes through the first and second through-holes to reach the top blocking plate, the beam of the second laser probe passes through the first through-hole to reach the second blocking plate, and the beam of the third laser probe reaches the bottom blocking plate. The heights of multiple blocking plates are measured simultaneously, and the corresponding heights are combined to offset the height of the laser probe below relative to the ground, thus obtaining the horizontal height of each corrugated pipe. In this invention, the height of multiple corrugated pipes is measured simultaneously based on the special inclined structure of the T-beam. During processing, there is no need to frequently adjust the measuring structure, effectively improving the measurement efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the adapter mechanism of the present invention; Figure 3 This is a schematic diagram of the structure of the magnetic chuck of the present invention; Figure 4 This is a schematic diagram of the movable base and torsion spring of the present invention; Figure 5 This is a schematic diagram of the measurement auxiliary mechanism of the present invention; Figure 6 This is a schematic diagram of the docking mechanism of the present invention; Figure 7 This is a schematic diagram of the horizontal control mechanism of the present invention; Figure 8 This is a schematic diagram of the propulsion mechanism of the present invention; Figure 9 This is a schematic diagram of the structure of the first through-hole, the second through-hole, and the laser probe of the present invention; Figure 10 This is a schematic diagram of the structure of the baffle plate and the bellows of the present invention; Figure 11 This is a schematic diagram of the support mechanism of the present invention.

[0015] In the picture: 100. Support mechanism; 101. Frame; 102. Wheels; 103. Linear drive unit 1; 200. Adaptor mechanism; 201. Hinge seat; 202. Flat plate; 203. Electromagnetic strip; 204. Through port; 205. Side plate; 206. Linear drive unit two; 207. Drive seat; 208. Top head; 209. Magnetic suction bracket; 300. Docking mechanism; 301. Moving seat; 302. Movable frame; 303. Wedge block; 304. Contact shaft; 305. Elastic element; 306. Wedge plate; 307. Electromagnet; 308. Torsion spring; 400. Measuring auxiliary mechanism; 401. Rotating frame; 402. Extension plate; 403. Spring frame; 404. Blocking plate; 405. First through-hole; 406. Second through-hole; 407. Push shaft; 500. Horizontal control mechanism; 501. Turntable; 502. Dial shaft; 503. Conical wheel assembly; 504. Gear; 505. T-rack; 506. Traction frame; 507. Swing arm; 508. Connecting shaft; 509. Power unit 1; 600. Propulsion mechanism; 601. Support frame; 602. Power unit II; 603. Lead screw; 604. Pulley assembly; 605. Propulsion frame; 700. Measuring mechanism; 701. Adjusting slide rail; 702. Mounting block; 703. Laser probe. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figures 1 to 11 The present invention provides a technical solution: including a support mechanism 100, the support mechanism 100 including a frame 101, the bottom of the frame 101 is provided with a traveling wheel 102, the top of the frame 101 is provided with a linear drive unit 103, and the frame 101 is provided with an adapter mechanism 200 through the linear drive unit 103. The adapter mechanism 200 includes a hinge base 201, which is slidably connected to the upright frame 101. A flat plate 202 is hinged to the bottom of the hinge base 201. An electromagnetic strip 203 is fixedly installed on the lower side of the flat plate 202. A through opening 204 is provided through the middle of the flat plate 202. Side plates 205 are provided on both sides of the flat plate 202 on the side of the through opening 204. A linear drive unit 206 is provided on one side of the side plate 205. A drive seat 207 is slidably installed on the flat plate 202 and screwed to the linear drive unit 206. A top head 208 is fixedly installed on the side of the drive seat 207. A magnetic suction frame 209 is fixedly installed on the side of the side plates 205 that are close to each other. In this embodiment, before the measurement begins, the walking wheel 102 is controlled to move, driving the upright 101 closer to the T-beam template. The hinge 201 is located in the middle of two sets of symmetrically arranged corrugated pipes. The linear drive unit 103 is controlled to move, and the hinge 201 moves along the upright 101 towards the measurement position. During the movement, the electromagnetic strip 203 at the bottom of the plate 202 first touches the inner wall of the T-beam template. The electromagnetic strip 203 attracts the T-beam template composed of steel reinforcement, causing the hinge 201 at the top to swing the plate 202 with its bottom as the axis during the movement. Finally, the outer surface of the plate 202 is attached to the inner edge of one side of the T-beam template. Then the linear drive unit 103 stops driving, completing the positioning of the adapter mechanism 200. The docking mechanism 300 is used to connect the top head 208; Measurement auxiliary mechanism 400, which is used to return the laser beam; The horizontal control mechanism 500 is used to control the measurement auxiliary mechanism 400 for leveling. The propulsion mechanism 600 is used to control the measurement auxiliary mechanism 400 to pass through the T-beam template; Measuring mechanism 700 is used for batch measurement; The docking mechanism 300 includes a movable seat 301 slidably disposed in the middle of the plate 202. Several movable seats 301 are provided. A movable frame 302 is slidably disposed on one side of the surface of the movable seat 301. A wedge block 303 is slidably disposed inside the movable frame 302. The surface of the wedge block 303 abuts against the top head 208. The wedge block 303 is elastically telescopically disposed on the movable frame 302. A contact shaft 304 is fixedly connected to the surface of the wedge block 303. An elastic element 305 is movably sleeved on the wedge block 303. The two ends of the elastic element 305 abut against the wedge block 303 and the movable frame 302 respectively. A wedge plate 306 is provided on one side of the movable base 301 above the contact shaft 304. The surface of the wedge plate 306 abuts against the surface of the contact shaft 304. An electromagnet 307 is fixedly connected to the other side of the movable base 301. The electromagnet 307 is movably connected to the magnetic suction frame 209. A torsion spring 308 is installed on one side of the axis of the movable base 301. In this embodiment, initially, all three movable seats 301 are located at the bottom of the plate 202. After the plate 202 is in place, the linear drive unit 206 controls the drive seat 207 to move upward. During this process, the top head 208 contacts the bottom surface of the bottommost wedge block 303, simultaneously lifting several movable seats 301 upward. During the lifting of the movable seats 301, the wedge block 303 is in an outward-releasing state. When the bottommost movable seat 301 is pushed to the side of one of the bottommost bellows, the electromagnet on the bottommost movable seat 301 activates. 307 outputs outward and is attracted to the magnetic suction frame 209, limiting the movement of the movable seat 301. The top head 208 continues to push the wedge 303 upward. The contact shaft 304 on the wedge 303 contacts the wedge plate 306 and is pushed into the interior of the movable frame 302 by the wedge plate 306, so that the corresponding wedge 303 finally disengages from the top head 208, disconnecting the docking mechanism 300. The drive seat 207 continues to move upward, lifting and disconnecting the remaining docking mechanisms 300. Finally, several docking mechanisms 300 are set one-to-one with the bellows. The measuring auxiliary mechanism 400 includes a rotating frame 401 rotatably disposed at the axis of the movable seat 301. A torsion spring 308 is abutted on one side of the rotating frame 401. An extension plate 402 is fixedly connected to the top of the rotating frame 401. A spring frame 403 is disposed between one end of the extension plate 402 and the rotating frame 401. A blocking plate 404 is slidably disposed on the spring frame 403. One end of the blocking plate 404 passes through the rotating frame 401 and is slidably connected to it. The end of the blocking plate 404 away from the rotating frame 401 abuts against the spring on the spring frame 403. A number of baffle plates 404 are adapted to the movable seat 301. The second baffle plate 404 and the third baffle plate 404 arranged from top to bottom are respectively provided with a first through hole 405 and a second through hole 406. The horizontal depth of the second through hole 406 is greater than that of the first through hole 405. A push shaft 407 is fixedly connected to the side of one end of the baffle plate 404. A turntable 501 is provided on the movable base 301 near the electromagnet 307. The turntable 501 is rotatably connected to the movable base 301. A pivot 502 is fixedly installed on the surface of the turntable 501 off-center. A conical wheel set 503 is connected to one side of the turntable 501 relative to the pivot 502. A gear 504 is fixedly connected to the side of the conical wheel set 503. A T-shaped rack 505 that is slidably connected to the movable base 301 is meshed with the top of the gear 504. A towing frame 506 abuts against the T-shaped rack 505, and the T-shaped rack 505 and the towing frame 506 are slidably connected. Both ends of the towing frame 506 pass through the side plate 205 and are slidably connected to it. A rotating arm 507 is hinged below the connection between the side of the side plate 205 and the towing frame 506. The two ends of the towing frame 506 are slidably arranged inside the rotating arm 507. A connecting shaft 508 passing through the side plate 205 is fixedly connected between the two rotating arms 507. One end of the connecting shaft 508 passes through the rotating arm 507 and is connected to the power unit 509. In this embodiment, after the docking mechanism 300 is correspondingly distributed, the bottom end of the baffle plate 404 is located above the top surface of the bellows. The power unit 509 is activated, driving the rotating arms 507 at both ends of the connecting shaft 508 to swing around the axis. During this process, according to the sliding groove opened on the side plate 205 by the rotating arm 507, the towing frame 506 is pulled out to the side of the flat plate 202. Before this, the T-shaped rack 505 moves along the linear path of the towing frame 506 while following the moving seat 301. During the sliding and pulling process of the towing frame 506, the T-shaped rack 505 slides outward. During this process, through the transmission of the gear 504 and the conical wheel set 503, the turntable 501 drives the dial shaft 502 to rotate. The dial shaft 502 presses the extension plate 402 below, causing the extension plate 402 to drive the rotating frame 401 to rotate around the axis of the moving seat 301. During this process, the torque of the torsion spring 308 is overcome, and after the multiple blocking plates 404 are in a horizontal state, the operation of the power unit 509 stops. The propulsion mechanism 600 includes a support frame 601 symmetrically arranged on the side of the side plate 205. A power unit 602 is connected to the side of one of the support frames 601. A lead screw 603 is rotatably arranged on the support frame 601. The bottom of one of the lead screws 603 is connected to the power unit 602. A pulley group 604 is connected to the top of the lead screw 603. A propulsion frame 605 is screwed onto the lead screw 603. The propulsion frame 605 abuts against the propulsion shaft 407. In this embodiment, after the blocking plate 404 is set in a horizontal state, the second power unit 602 is activated, the lead screw 603 drives the push frame 605 to move closer to the plate 202, and the pulley group 604 runs synchronously with the lead screw 603 at the other end. During the movement of the push frame 605, it pushes multiple push shafts 407 to move synchronously, so that the blocking plate 404 passes through the top of the corresponding corrugated pipe and passes through the T-beam template. Several blocking plates 404 are pushed by the push frame 605 and are staggered according to the tilted state of the plate 202, and the staggered distance is equal. The measuring mechanism 700 includes an adjusting slide rail 701, which is located on one side of the bottom of the support frame 101. A mounting block 702 is driven on the adjusting slide rail 701. Several laser probes 703 are linearly arrayed on the top of the mounting block 702. The laser probes 703 are respectively arranged according to the positions of the second through-hole 406, the first through-hole 405 and the uppermost blocking plate 404. In this embodiment, the sliding rail 701 drives the mounting block 702 to move and align with the second through hole 406. The laser probe 703 is activated and emits laser beams upwards respectively, simultaneously measuring the height of several corresponding blocking plates 404. Similarly, this height is the top surface height of several corresponding corrugated pipes, thus completing the measurement of the corrugated pipe height. The first through-hole 405 is close to the corresponding propulsion shaft 407, and the second through-hole 406 is far away from the corresponding propulsion shaft 407. In this embodiment, linear drive unit 103 and linear drive unit 206 are preferably screw motor structures, power unit 1 509 and power unit 2 602 are preferably servo motor structures, elastic element 305 is preferably a spring, and the lateral width of the second through-hole 406 is greater than the lateral width of the first through-hole 405 to prevent obstruction of the emission path of the upward-emitted laser beam. The method of use and advantages of this invention: The working process of this road and bridge construction surveying device is as follows: like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 As shown: S1: Move the mobile device to the side of the T-beam template, drive the hinge 201 to move down, and the electromagnetic strip 203 at the bottom of the plate 202 adsorbs the inner wall of the template and swings adaptively to fit the inner edge of the template, thus completing the positioning of the adapter mechanism 200. S2: Drive seat 207 is lifted upward, simultaneously lifting all moving seats 301. After the moving seats 301 are in place in sequence, the electromagnet 307 is attracted and limited, and the wedge block 303 gradually disengages from the top head 208. Finally, each group of docking mechanisms 300 is arranged next to the bellows. S3: The power unit 509 drives the swing arm 507 to swing, pull out the towing frame 506, and drive the dial shaft 502 to rotate via the gear 504 and the cone wheel transmission, overcoming the torsion spring 308 to drive the blocking plate 404 to rotate to a horizontal position. S4: Power unit 2 602 drives lead screw 603 and push frame 605 forward, pushing baffle plate 404 through bellows and template; all baffle plates 404 are arranged in an equidistant staggered arrangement; S5: Adjust the slide rail 701 to align the laser probe 703, emit a laser to detect the height of the blocking plate 404, and thus obtain the height of the top surface of each corrugated pipe to complete the measurement.

[0018] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A road and bridge construction surveying device, characterized in that, The support mechanism (100) includes a support frame (101), a walking wheel (102) is driven at the bottom of the support frame (101), a linear drive unit (103) is horizontally arranged at the top of the support frame (101), and an adapter mechanism (200) is driven on the support frame (101) through the linear drive unit (103). The adapter mechanism (200) includes a hinge base (201), which is slidably connected to the upright frame (101). A plate (202) is hinged to the bottom of the hinge base (201). An electromagnetic strip (203) is fixedly installed on the lower side of the plate (202). A through opening (204) is provided in the middle of the plate (202). Side plates (205) are provided on both sides of the plate (202) on the side of the through opening (204). A linear drive unit (206) is provided on one side of the side plate (205). A drive seat (207) is slidably installed on the plate (202) and screwed to the linear drive unit (206). A top head (208) is fixedly installed on the side of the drive seat (207). A magnetic suction frame (209) is fixedly installed on the side of the side plates (205) that are close to each other. A docking mechanism (300) is used to connect to the top head (208); A measurement auxiliary mechanism (400) for returning the laser beam; A leveling control mechanism (500) is used to control the measuring auxiliary mechanism (400) to perform leveling; A propulsion mechanism (600) is used to control the measurement auxiliary mechanism (400) to pass through the T-beam template; A measuring mechanism (700) is used for batch measurement.

2. The road and bridge construction surveying device according to claim 1, characterized in that: The docking mechanism (300) includes a movable seat (301) slidably disposed in the middle of the plate (202). Several movable seats (301) are provided. A movable frame (302) is slidably disposed on one side of the surface of the movable seat (301). A wedge (303) is slidably disposed inside the movable frame (302). The surface of the wedge (303) abuts against the top head (208). The wedge (303) is elastically telescopically disposed on the movable frame (302). A contact shaft (304) is fixedly connected to the surface of the wedge (303). An elastic element (305) is movably sleeved on the wedge (303). The two ends of the elastic element (305) abut against the wedge (303) and the movable frame (302) respectively.

3. The road and bridge construction surveying device according to claim 2, characterized in that: A wedge plate (306) is provided on one side of the movable seat (301) above the touch shaft (304), and the surface of the wedge plate (306) abuts against the surface of the touch shaft (304). An electromagnet (307) is fixedly connected to the other side of the movable seat (301), and the electromagnet (307) is movably connected to the magnetic suction frame (209). A torsion spring (308) is installed on one side of the axis of the movable seat (301).

4. The road and bridge construction surveying device according to claim 1, characterized in that: The measuring auxiliary mechanism (400) includes a rotating frame (401) rotatably disposed at the axis of the movable seat (301). A torsion spring (308) abuts against one side of the rotating frame (401). An extension plate (402) is fixedly connected to the top of the rotating frame (401). A spring frame (403) is disposed between one end of the extension plate (402) and the rotating frame (401). A blocking plate (404) is slidably disposed on the spring frame (403). One end of the blocking plate (404) passes through the rotating frame (401) and is slidably connected to it. The end of the blocking plate (404) away from the rotating frame (401) abuts against the spring on the spring frame (403).

5. A road and bridge construction surveying device according to claim 4, characterized in that: The baffle plate (404) is adapted to the movable seat (301) in several ways. The second baffle plate (404) and the third baffle plate (404) arranged from top to bottom are respectively provided with a first through hole (405) and a second through hole (406). The horizontal depth of the second through hole (406) is greater than that of the first through hole (405). A push shaft (407) is fixedly connected to the side of one end of the baffle plate (404).

6. The road and bridge construction surveying device according to claim 5, characterized in that: A turntable (501) is provided on the movable base (301) near the electromagnet (307). The turntable (501) is rotatably connected to the movable base (301). A dial (502) is fixedly installed on the surface of the turntable (501) off-center. A conical wheel set (503) is connected to one side of the turntable (501) relative to the dial (502). A gear (504) is fixedly connected to the side of the conical wheel set (503). A T-shaped rack (505) that is slidably connected to the movable base (301) is engaged at the top of the gear (504).

7. A road and bridge construction surveying device according to claim 6, characterized in that: The T-shaped rack (505) abuts against the towing frame (506), and the T-shaped rack (505) and the towing frame (506) are slidably connected. The two ends of the towing frame (506) pass through the side plate (205) and are slidably connected thereto. A rotating arm (507) is hinged below the side of the side plate (205) where it connects to the towing frame (506). The two ends of the towing frame (506) are slidably arranged inside the rotating arm (507). A connecting shaft (508) passing through the side plate (205) is fixedly connected between the two rotating arms (507). One end of the connecting shaft (508) passes through the rotating arm (507) and is connected to a power unit (509).

8. A road and bridge construction surveying device according to claim 1, characterized in that: The propulsion mechanism (600) includes a support frame (601) symmetrically arranged on the side of the side plate (205). A power unit (602) is connected to the side of one of the support frames (601). A lead screw (603) is rotatably arranged on the support frame (601). The bottom of one of the lead screws (603) is connected to the power unit (602) for transmission. A pulley group (604) is connected to the top of the lead screw (603). A propulsion frame (605) is screwed onto the lead screw (603). The propulsion frame (605) abuts against the propulsion shaft (407).

9. A road and bridge construction surveying device according to claim 1, characterized in that: The measuring mechanism (700) includes an adjusting slide rail (701), which is located on the bottom side of the support frame (101). A mounting block (702) is driven on the adjusting slide rail (701). A number of laser probes (703) are linearly arrayed on the top of the mounting block (702). The laser probes (703) are respectively positioned according to the positions of the second through-hole (406), the first through-hole (405), and the uppermost blocking plate (404).

10. A road and bridge construction surveying device according to claim 9, characterized in that: The first opening (405) is close to the corresponding propulsion shaft (407), and the second opening (406) is far away from the corresponding propulsion shaft (407).

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