Bridge construction displacement detection equipment

Abstract

The invention relates to the technical field of bridge detection, and discloses bridge construction displacement detection equipment which comprises a cross beam, a main beam is fixed to the tops of the two ends of the cross beam, first reflection targets are fixed to the bottoms of the two sides of the main beam, a mounting plate is fixed to the surface of the cross beam, and an indicator plate is fixed to the bottom of the mounting plate. According to the bridge construction displacement detection equipment, the first laser transmitter corresponds to the first reflection target, the displacement deviation between the main beam and the cross beam in the length direction is detected, the second laser generator corresponds to the second reflection target, the displacement deviation between the main beam and the cross beam in the width direction is detected, and the displacement deviation between the main beam and the cross beam in the length direction is detected. The main beam can be accurately hung on the top of the cross beam due to the displacement deviation between the main beam and the cross beam, then the accuracy of main beam installation is improved, meanwhile, after installation is completed, the installation plate and the installation frame can be conveniently disassembled, and then the convenience of disassembling detection equipment during construction is reduced.

Description

Technical Field

[0001] This invention relates to the field of bridge inspection technology, specifically to a bridge construction displacement detection device. Background Technology

[0002] Bridge construction displacement detection is an engineering surveying work that uses professional measurement equipment and methods to continuously monitor, collect, analyze, and provide early warnings about the spatial position changes of various parts of the bridge structure throughout the entire bridge construction process. The core of the monitoring is the physical deformation of each structure under factors such as construction loads, environmental loads, and material creep, including vertical displacement (settlement, deflection), horizontal displacement (lateral or longitudinal offset), tilt (rotation), and alignment deviation. It is a core component of bridge construction monitoring.

[0003] Depending on the type of displacement, such as settlement, horizontal displacement, deflection, and rotation, different equipment is required. When detecting horizontal or settlement displacement, displacement gauges and dial gauges are commonly used. These devices need to be installed at multiple locations, such as both ends of the bridge, both ends of the piers, and the bottom of the bridge. However, during bridge construction, the installation of piers and the bridge itself is usually done in multiple sections. After construction is completed, most of these displacement detection devices need to be removed. Therefore, too many detection devices increase the workload of installation and removal, as well as the construction safety risks. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a bridge construction displacement detection device, which solves the problem of large demolition workload mentioned in the background section.

[0005] The present invention provides the following technical solution: a bridge construction displacement detection device, including a crossbeam, a main beam fixed at the top of both ends of the crossbeam, a first reflective target fixed at the bottom of both sides of the main beam, and a mounting plate fixed on the surface of the crossbeam;

[0006] An indicator plate is fixed to the bottom of the mounting plate, a threaded post is fixed to the surface of the mounting plate, a mounting bracket is slidably connected to the surface of the threaded post, a first mounting groove is opened in the vertical part of the mounting bracket, a first laser emitter is fixed inside the first mounting groove, and a second mounting groove is opened on both sides of the horizontal part of the mounting bracket, and two second laser generators are fixed inside the second mounting groove.

[0007] The two sides of the bottom of both ends of the main beam are fixed with pads, and the bottom of the pads is fixed with a fixing frame. A second reflective target is fixed on one side of the two adjacent fixing frames. A protective plate is hinged to the end of the fixing frame near the mounting plate.

[0008] Preferably, a lithium battery is embedded in the top of the fixing frame, and a storage cavity is opened inside the fixing frame. A first connector is slidably connected inside the storage cavity. A metal rod is fixed to the inner wall of one end of the storage cavity. A first electromagnet is fixed to the side of the first connector near the metal rod. A spring is fixed to the side of the first connector near the metal rod. One end of the spring is fixed to the inner wall of the storage cavity, and the metal rod and the first electromagnet are located inside the spring.

[0009] Preferably, a first lead screw is fixed to the side of the first connector away from the metal rod, a second connector is fixed to the end of the first lead screw away from the first connector, a protective frame is fixed to one side of the second connector, and a motor is fixed inside the protective frame.

[0010] Preferably, the output shaft of the motor passes through the second connector, and the output shaft of the motor is fixed with a second lead screw. The surfaces of the first lead screw and the second lead screw are both threaded with a support frame, and a circular prism is fixed to the surface of the support frame.

[0011] Preferably, an annular tube is fixed to the end of the inner side of the storage cavity away from the metal rod, and a slot is opened on the side of the annular tube near the motor, and the slot is slidably connected to the motor.

[0012] Preferably, a soft brush is fixed to the inner wall of the annular tube, and the first lead screw and the second lead screw are sleeved with the annular tube.

[0013] Preferably, the bottom of the pad near the protective plate has an embedded groove, a second electromagnet is fixed inside the embedded groove, and a wire is fixed on one side of the embedded groove, the wire being fixedly connected to the second electromagnet.

[0014] Preferably, a support column is fixed to the surface of the crossbeam, the top height of the support column is the same as the top height of both ends of the crossbeam, and bridge piers are fixed to the bottom of both ends of the crossbeam.

[0015] Preferably, the first laser emitter corresponds to the first reflective target, and the second laser generator corresponds to the second reflective target.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This bridge construction displacement detection equipment uses a first laser emitter corresponding to a first reflective target to detect the displacement deviation of the main beam in the length direction relative to the crossbeam, and a second laser generator corresponding to a second reflective target to detect the displacement deviation of the main beam in the width direction relative to the crossbeam. This allows the main beam to be accurately suspended on top of the crossbeam, thereby improving the accuracy of the main beam installation. At the same time, after installation, the mounting plate and mounting frame can be easily disassembled, thus reducing the inconvenience of dismantling the detection equipment during construction.

[0018] 2. When performing routine inspections after construction is completed, the first electromagnet is de-energized, causing the support frame and circular prism to extend to the outside of the receiving cavity. The second lead screw and circular prism are rotated by a motor, so that the two circular prisms are perpendicularly intersecting. This improves the accuracy of subsequent data on horizontal displacement and settlement displacement between the main beam and the crossbeam. When not in use, the circular prism is protected, improving the reflection of the circular prism and the accuracy of subsequent inspections. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a side view of the structure of the present invention;

[0021] Figure 3 This is a schematic diagram showing the positional relationship between the crossbeam and the mounting plate of the present invention;

[0022] Figure 4 This is an exploded view of the mounting plate and mounting bracket of the present invention;

[0023] Figure 5 This is a bottom view of the main beam of the present invention;

[0024] Figure 6 This is a schematic diagram showing the positional relationship between the second connector and the protective frame of the present invention;

[0025] Figure 7 This is an exploded view of the structure of the pad and the fixing frame of the present invention;

[0026] Figure 8 This is an internal view of the structure of the fixing frame of the present invention.

[0027] In the diagram: 1. Crossbeam; 11. Support column; 12. Pier; 2. Main beam; 21. First reflector target; 3. Mounting plate; 31. Indicator plate; 32. Threaded column; 33. Mounting frame; 34. First mounting slot; 35. First laser emitter; 36. Second mounting slot; 37. Second laser generator; 4. Pad; 41. Fixing frame; 42. Second reflector target; 43. Protective plate; 44. Lithium battery; 5. Storage cavity; 51. First connector; 52. Metal rod; 53. First electromagnet; 54. Spring; 55. First lead screw; 56. Second connector; 57. Protective frame; 58. Motor; 581. Second lead screw; 59. Support frame; 591. Circular prism; 6. Ring tube; 61. Slot; 62. Soft brush; 7. Embedded slot; 71. Second electromagnet; 72. Wire. Detailed Implementation

[0028] 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.

[0029] Example 1:

[0030] Please see Figure 1-8 A bridge construction displacement detection device includes a crossbeam 1, a main beam 2 fixed to the top of both ends of the crossbeam 1, a first reflective target 21 fixed to the bottom of both sides of the main beam 2, a mounting plate 3 fixed to the surface of the crossbeam 1, an indicator plate 31 fixed to the bottom of the mounting plate 3, a threaded column 32 fixed to the surface of the mounting plate 3, a mounting frame 33 slidably connected to the surface of the threaded column 32, a first mounting groove 34 opened in the vertical part of the mounting frame 33, a first laser emitter 35 fixed inside the first mounting groove 34, and a second mounting groove 36 opened on both sides of the horizontal part of the mounting frame 33, with two second laser generators 37 fixed inside the second mounting groove 36.

[0031] The bottom sides of both ends of the main beam 2 are fixed with pads 4, the bottom of the pads 4 are fixed with brackets 41, and the opposite side of the two adjacent brackets 41 is fixed with a second reflective target 42. The end of the bracket 41 near the mounting plate 3 is hinged with a protective plate 43. The surface of the crossbeam 1 is fixed with a support column 11. The top height of the support column 11 is the same as the top height of both ends of the crossbeam 1. The bottom of both ends of the crossbeam 1 is fixed with a pier 12. The first laser emitter 35 corresponds to the first reflective target 21, and the second laser generator 37 corresponds to the second reflective target 42.

[0032] Specifically, during the hoisting process of the crossbeam 1 and the main beam 2, the first reflective target 21 is first fixed in the middle position at the bottom of both ends of the main beam 2. Then, after the pad 4 is bonded to the fixing frame 41, the pad 4 and the fixing frame 41 are fixed to both sides of the bottom of both ends of the main beam 2 by bolts. That is, each first reflective target 21 is provided with a pad 4 and a fixing frame 41 on both sides.

[0033] Next, the mounting plate 3 is fixed to the surface of the crossbeam 1 through the construction platform, and the calibration is performed by the indicator plate 31 so that the mounting plate 3 is fixed in the middle position on the surface of the crossbeam 1. Then, the vertical part of the mounting bracket 33 is sleeved on the surface of the threaded column 32, and the horizontal part of the mounting bracket 33 is placed on the surface of the crossbeam 1. Then, the threaded column 32 and the mounting bracket 33 are fixed by bolts.

[0034] Then, the main beam 2 is hoisted to the top of the crossbeam 1 using hoisting equipment. Subsequently, the first laser emitter 35 is activated by the controller, so that the laser of the first laser emitter 35 irradiates the first reflective target 21. By measuring the distance the laser moves on the surface of the first reflective target 21, and taking the length direction of the main beam 2 as a reference, the displacement deviation between the main beam 2 and the crossbeam 1 is determined, making the hoisting of the main beam 2 more precise.

[0035] After the first laser emitter 35 has determined its installation position through the first reflective target 21, the main beam 2 is hoisted to the top of the crossbeam 1 by the hoisting equipment. Before the crossbeam 1 contacts the main beam 2, the second laser generator 37 is activated by the controller, so that the laser of the second laser generator 37 irradiates the second reflective target 42. By reflecting the laser by the second reflective target 42, the distance between the second reflective target 42 and the second laser generator 37 is determined. At this time, the displacement deviation between the main beam 2 and the crossbeam 1 is determined with the width direction of the main beam 2 as the reference.

[0036] Since there are two second laser generators 37 on the same side, when the data measured by the two second laser generators 37 on the same side are the same as those measured by the second reflective target 42, it can be confirmed that the angle between the main beam 2 and the crossbeam 1 is 90 degrees, that is, the main beam 2 and the crossbeam 1 are perpendicular. At this time, the installation positions between the main beam 2 and the crossbeam 1 are confirmed. Then, the main beam 2 can be hoisted to the top of the crossbeam 1 and the support column 11 by the hoisting equipment, thus completing the installation of the current main beam 2 and crossbeam 1.

[0037] After the main beam 2 and the cross beam 1 are installed, the mounting frame 33 is removed from the surface of the mounting plate 3 through the construction platform, and then the mounting plate 3 is removed from the surface of the cross beam 1. This ensures that only one set of equipment, the mounting plate 3, needs to be removed during the installation stages of each main beam 2 and cross beam 1, thereby improving the convenience and efficiency of the overall construction of the invention.

[0038] It should be noted that all devices in this invention are controlled by a controller, and the first laser emitter 35 and the second laser generator 37 are both connected to a display. The display can be installed inside the hoisting equipment, so that the hoisting equipment operator can intuitively know the current positional deviation of the main beam 2 and the crossbeam 1 and make subsequent adjustments, thereby improving the installation accuracy of the main beam 2 and the crossbeam 1.

[0039] Example 2:

[0040] A lithium battery 44 is embedded in the top of the fixing frame 41. A storage cavity 5 is opened inside the fixing frame 41. A first connector 51 is slidably connected inside the storage cavity 5. A metal rod 52 is fixed to the inner wall of one end of the storage cavity 5. A first electromagnet 53 is fixed to the side of the first connector 51 near the metal rod 52. A spring 54 is fixed to the side of the first connector 51 near the metal rod 52. One end of the spring 54 is fixed to the inner wall of the storage cavity 5, and the metal rod 52 and the first electromagnet 53 are located inside the spring 54.

[0041] A first lead screw 55 is fixed to the side of the first connector 51 away from the metal rod 52. A second connector 56 is fixed to the end of the first lead screw 55 away from the first connector 51. A protective frame 57 is fixed to one side of the second connector 56. A motor 58 is fixed inside the protective frame 57. The output shaft of the motor 58 passes through the second connector 56 and is fixed to a second lead screw 581. A support frame 59 is threaded onto the surfaces of the first lead screw 55 and the second lead screw 581. A circular prism 591 is fixed to the surface of the support frame 59.

[0042] Specifically, based on Embodiment 1, after the bridge construction is completed, that is, after the mounting plate 3 and the mounting frame 33 are removed from the surface of the crossbeam 1, during subsequent displacement monitoring, the controller controls the first electromagnet 53 to be de-energized, so that the first electromagnet 53 loses its attraction to the metal rod 52. At this time, the first connecting piece 51 is pushed away from the metal rod 52 by the elastic force of the spring 54.

[0043] When the first connector 51 is ejected in a direction away from the metal rod 52, the first connector 51 simultaneously pushes the first lead screw 55 to eject in a direction away from the metal rod 52, thereby causing the first lead screw 55 to drive the second connector 56, the protective frame 57, the motor 58 and the second lead screw 581 to eject synchronously, so that the first lead screw 55 and the second lead screw 581 extend from the inside of the storage cavity 5 to the outside of the storage cavity 5, thereby causing the first lead screw 55 and the second lead screw 581 to drive the support frame 59 and the circular prism 591 to extend out of the storage cavity 5;

[0044] When the support frame 59 on the surface of the first lead screw 55 and the second lead screw 581 are exposed outside the storage cavity 5, the motor 58 is started by the controller, so that the motor 58 drives the second lead screw 581 to rotate in the direction of the crossbeam 1 until the included angle between the first lead screw 55 and the second lead screw 581 becomes ninety degrees, so that the two support frames 59 are respectively located in the horizontal and vertical directions of the main beam 2.

[0045] Subsequently, the circular prism 591 is irradiated and tested using detection equipment such as a total station on a ground or sea platform to complete the subsequent testing. The horizontal offset data and settlement data of the main beam 2 and the crossbeam 1 are detected by using the reflection net composed of two circular prisms 591 in the horizontal and vertical directions.

[0046] After the routine manual monitoring is completed, the motor 58 can be controlled again to control the second lead screw 581 to flip and reset, so that the second lead screw 581 returns to the same horizontal state as the first lead screw 55. Then, the first electromagnet 53 is energized, so that the first electromagnet 53 generates magnetic force and attracts the metal rod 52 again. Since the metal rod 52 is in a fixed state, the first electromagnet 53 is energized and drives the first connecting piece 51 to move towards the metal rod 52, so that the first connecting piece 51 presses the spring 54 until the first electromagnet 53 and the metal rod 52 are attracted together.

[0047] At this time, the first connector 51 drives the first lead screw 55 and the second lead screw 581 to retract into the storage cavity 5, thereby causing the support frame 59 on the surface of the first lead screw 55 and the second lead screw 581 and the circular prism 591 to be retracted into the storage cavity 5. Then, the fixed frame 41 protects the circular prism 591, thereby preventing dust from accumulating on the surface of the circular prism 591, thus improving the reflection accuracy of the circular prism 591, and thus improving the subsequent displacement detection accuracy.

[0048] It should be noted that the lithium battery 44 supplies power to the first electromagnet 53 and the motor 58 through wires, and the power source of the lithium battery 44 can be connected to the street lighting system on the bridge surface, so that the street lighting system supplies power to the lithium battery 44 and the first electromagnet 53.

[0049] After the main beam 2 is hoisted and installed on top of the crossbeam 1, the controller can first control the first lead screw 55 and the second lead screw 581 to extend to the outside of the receiving cavity 5. Then, the support frame 59 on the surface of the first lead screw 55 and the second lead screw 581 are rotated respectively, so that the two circular prisms 591 can be adjusted to rotate with the first lead screw 55 and the second lead screw 581 as the axis. This ensures that the total station and other monitoring equipment on the ground or offshore platform can illuminate the circular prisms 591, thereby improving the accuracy of subsequent displacement detection.

[0050] The initial state of the first electromagnet 53 is energized, that is, the initial state of the first electromagnet 53 and the metal rod 52 is in a state of mutual resistance, and the initial state of the spring 54 is compressed.

[0051] Example 3:

[0052] An annular tube 6 is fixed to the end of the storage cavity 5 away from the metal rod 52. A slot 61 is opened on the side of the annular tube 6 near the motor 58. The slot 61 is slidably connected to the motor 58. A soft brush 62 is fixed to the inner wall of the annular tube 6. The first lead screw 55 and the second lead screw 581 are sleeved with the annular tube 6. An embedded groove 7 is opened at the bottom of the pad plate 4 near the protective plate 43. A second electromagnet 71 is fixed inside the embedded groove 7. A wire 72 is fixed to one side of the embedded groove 7. The wire 72 is fixedly connected to the second electromagnet 71.

[0053] Specifically, based on Embodiment 1 and Embodiment 2, when the circular prism 591 completes displacement detection in conjunction with the monitoring equipment on the ground or offshore platform, that is, when the first connecting piece 51 and the first lead screw 55 are retracted into the storage cavity 5 under the elastic force of the spring 54, the first lead screw 55 carries the motor 58 through the slot 61 and is retracted into the storage cavity 5.

[0054] The two circular prisms 591 enter the interior of the annular tube 6 and are cleaned by the soft brush 62. This removes dust and debris that may have accumulated on the outside of the storage cavity 5, further protecting the cleanliness of the surface of the circular prisms 591. This makes the subsequent reflection accuracy of the circular prisms 591 more precise, thereby improving the accuracy of subsequent displacement detection.

[0055] When the first connector 51 carries the first lead screw 55 and the second lead screw 581 to extend to the outside of the storage cavity 5, the second lead screw 581 pushes the protective plate 43, causing the protective plate 43 to flip toward the direction of the second electromagnet 71. Then, after the second electromagnet 71 is energized, the second electromagnet 71 attracts the protective plate 43, so that the support frame 59 can extend smoothly to the outside of the storage cavity 5.

[0056] After the support frame 59 is retracted into the storage cavity 5, the second electromagnet 71 is de-energized, so that the protective plate 43 returns to a vertical state under the action of gravity and seals the storage cavity 5, thereby placing the support frame 59 and the circular prism 591 in the closed space.

[0057] Furthermore, when the protective plate 43 seals the receiving cavity 5, it can block the speed at which sea surface salt spray and other substances enter the receiving cavity 5, reducing the impact of sea surface salt spray on the circular prism 591. At the same time, the high-density setting of the soft brush 62 can cover the surface of the circular prism 591, which can further reduce the impact of sea surface salt spray on the circular prism 591, thereby improving the detection accuracy of the circular prism 591 on the cross-sea bridge.

[0058] Furthermore, during routine monitoring using a total station, the system can maintain a monitoring frequency of once every 12 hours. During periods of non-monitoring, the first electromagnet 53 is in an energized and adsorbing state. When the first electromagnet 53 is energized, its operating temperature can be transferred to the first connector 51, and then to the air inside the receiving cavity 5 through the first connector 51. This causes the temperature inside the receiving cavity 5 to rise, which further reduces the adsorption of sea surface salt spray on the circular prism 591, thereby enhancing the anti-salt spray effect of the present invention and improving the accuracy of subsequent displacement detection.

[0059] It should be noted that the annular tube 6 is made of flexible material, which can buffer the force of the first electromagnet 53 driving the first connector 51 to bounce away from the metal rod 52, thereby reducing the vibration impact on the support frame 59.

[0060] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bridge construction displacement detection device, comprising a crossbeam (1), characterized in that: The top of both ends of the crossbeam (1) is fixed with a main beam (2), the bottom of both sides of the main beam (2) is fixed with a first reflective target (21), and the surface of the crossbeam (1) is fixed with a mounting plate (3). An indicator plate (31) is fixed to the bottom of the mounting plate (3). A threaded post (32) is fixed to the surface of the mounting plate (3). A mounting bracket (33) is slidably connected to the surface of the threaded post (32). A first mounting groove (34) is opened in the vertical part of the mounting bracket (33). A first laser emitter (35) is fixed inside the first mounting groove (34). A second mounting groove (36) is opened on both sides of the horizontal part of the mounting bracket (33). Two second laser generators (37) are fixed inside the second mounting groove (36). The two sides of the bottom of the main beam (2) are fixed with pads (4), the bottom of the pads (4) are fixed with a fixing frame (41), and a second reflective target (42) is fixed on one side of the two adjacent fixing frames (41). A protective plate (43) is hinged to one end of the fixing frame (41) near the mounting plate (3).

2. The bridge construction displacement detection equipment according to claim 1, characterized in that: The top of the fixing frame (41) is inlaid with a lithium battery (44). The inside of the fixing frame (41) is provided with a storage cavity (5). The storage cavity (5) is slidably connected with a first connector (51). A metal rod (52) is fixed to the inner wall of one end of the storage cavity (5). A first electromagnet (53) is fixed to the side of the first connector (51) near the metal rod (52). A spring (54) is fixed to the side of the first connector (51) near the metal rod (52). One end of the spring (54) is fixed to the inner wall of the storage cavity (5), and the metal rod (52) and the first electromagnet (53) are located inside the spring (54).

3. The bridge construction displacement detection equipment according to claim 2, characterized in that: A first lead screw (55) is fixed on the side of the first connector (51) away from the metal rod (52), and a second connector (56) is fixed on the end of the first lead screw (55) away from the first connector (51). A protective frame (57) is fixed on one side of the second connector (56), and a motor (58) is fixed inside the protective frame (57).

4. The bridge construction displacement detection equipment according to claim 3, characterized in that: The output shaft of the motor (58) passes through the second connector (56), and the output shaft of the motor (58) is fixed with a second lead screw (581). The surfaces of the first lead screw (55) and the second lead screw (581) are threaded with a support frame (59), and the surface of the support frame (59) is fixed with a circular prism (591).

5. The bridge construction displacement detection equipment according to claim 4, characterized in that: An annular tube (6) is fixed to one end of the inner side of the storage cavity (5) away from the metal rod (52). A slot (61) is provided on the side of the annular tube (6) near the motor (58). The slot (61) is slidably connected to the motor (58).

6. The bridge construction displacement detection equipment according to claim 5, characterized in that: A soft brush (62) is fixed to the inner wall of the annular tube (6), and the first lead screw (55) and the second lead screw (581) are sleeved with the annular tube (6).

7. The bridge construction displacement detection equipment according to claim 1, characterized in that: The pad (4) has an embedded groove (7) at the bottom near the protective plate (43). A second electromagnet (71) is fixed inside the embedded groove (7). A wire (72) is fixed on one side of the embedded groove (7). The wire (72) is fixedly connected to the second electromagnet (71).

8. The bridge construction displacement detection equipment according to claim 1, characterized in that: The surface of the crossbeam (1) is fixed with a support column (11), the top height of the support column (11) is the same as the top height of both ends of the crossbeam (1), and the bottom of both ends of the crossbeam (1) is fixed with a pier (12).

9. The bridge construction displacement detection equipment according to claim 1, characterized in that: The first laser emitter (35) corresponds to the first reflective target (21), and the second laser generator (37) corresponds to the second reflective target (42).

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