A bridge displacement detection device and detection method for bridge construction

Abstract

The present application relates to the technical field of bridge displacement detection during bridge construction, and in particular to a bridge displacement detection device and a detection method during bridge construction, including a mounting frame, on which a detection mechanism is arranged. In the detection mechanism designed by the present invention, a plurality of moving blocks can perform detection and processing on different positions of a bridge by cooperating with a marking pen and a paper tape, so as to increase the detection data group, reduce the singleness of the detection data, and make the detection data more representative; in the bridge displacement detection method during bridge construction designed by the present invention, the interference block is made to be a certain distance away from the bottom of the bridge (that is, the safe displacement length), so that the displacement of this section can offset the displacement of normal shaking of the bridge, so as to avoid the possibility that the shaking under the normal displacement of the bridge is mistaken for abnormal shaking.

Description

Technical Field

[0001] The present application relates to the technical field of bridge displacement detection during bridge construction, and in particular to a bridge displacement detection device and a detection method during bridge construction. Background Art

[0002] During bridge displacement detection, the length of the bridge displacement is detected to determine the length of its deformation. Then, the bridge structure condition can be detected through bridge displacement monitoring. Once a potential abnormality occurs, maintenance personnel are reminded to repair the bridge to extend the service life of the bridge.

[0003] A bridge displacement detection device is needed for bridge displacement detection. For example, a patent application with publication number CN221683999U discloses a bridge displacement detection device for bridge construction. A cross bar is sleeved on a round bar, a sleeve hole matching the round bar is penetrated at the center of the front end face of the cross bar, a limit plate is provided on the front end face of the round bar, and vertical bars are provided on both sides of the top of the cross bar; by stretching the telescopic sleeve rod, the distance between the cross bar and the base can be adjusted, so that the distance between different piers and bridges can be adapted. After the adjustment is completed, the base is fixed on the pier, and the connecting plate is connected to the preset hole of the bridge through the connecting hole, so that the telescopic sleeve rod will not shrink; when the bridge is displaced, the cross bar will be pressed down through the connecting plate and the vertical bar, causing the cross bar to appear high on one side and low on the other side. When this happens, the distance sensor at the corresponding position will sense the change in distance and transmit a signal to the controller, which will receive the signal and then control the indicator light to turn on.

[0004] The above patent application still has the following problems when detecting bridge displacement: 1. Since the span between bridge piers may be long, the above patent application can only detect and process a single area or a single position of the bridge, and the detection data is relatively single and not representative.

[0005] 2. Since the bridge will also shake to a certain extent when vehicles travel on the bridge, a certain length of safety displacement will be reserved when designing the bridge to offset this part of the shaking. The connecting plate of the above-mentioned patent application is directly connected to the bridge, which may cause an alarm even if the bridge shakes under its safety displacement, affecting the accuracy of the detection results. If the detection is carried out when there are no vehicles on the bridge, the detection data cannot reflect the displacement of the bridge in the actual use scenario, and the bridge needs to be closed when there are no vehicles on the bridge, affecting traffic.

[0006] Based on this, and in accordance with the above-mentioned viewpoints, there is still room for improvement in the existing technology for bridge displacement detection. Summary of the invention

[0007] To solve the above technical problems, the present application provides a bridge displacement detection device and a detection method for bridge construction, adopting the following technical solutions:

[0008] In a first aspect, a bridge displacement detection device for bridge construction includes an installation frame, and a detection mechanism is provided on the installation frame.

[0009] The detection mechanism includes: a moving block, a plurality of which are uniformly arranged along the length direction of the installation frame, and the moving block is slidably installed on the installation frame.

[0010] A U-shaped frame, corresponding to the moving block one by one and with the opening facing downwards, is installed on the corresponding moving block.

[0011] A marking pen, corresponding to the U-shaped frame one by one and arranged on the horizontal section of the U-shaped frame, and automatically resets.

[0012] A paper tape, corresponding to the marking pen one by one and arranged on one side of the tip of the marking pen.

[0013] Preferably, a moving rod is slidably penetrated through the horizontal section of the U-shaped frame. The marking pen extends along the width direction of the horizontal section of the U-shaped frame, and the marking pen is clamped at the bottom of the moving rod. A抵触块 (resisting block) is installed at the top of the moving rod. A reset spring is sleeved on the moving rod. One end of the reset spring is installed on the resisting block, and the other end of the reset spring is installed on the horizontal section of the U-shaped frame. A connecting rod is arranged between adjacent two moving blocks, and both ends of the connecting rod are respectively installed on the corresponding moving blocks.

[0014] Preferably, a fixed frame is installed on one side of the moving block close to the tip of the marking pen. On the end face of the fixed frame and on one side far from the corresponding moving block, winding shafts are symmetrically arranged along its length direction, and the winding shafts are installed through the fixed frame by bearings, and the winding shafts rotate.

[0015] Preferably, a gear is rotatably installed at the bottom of the circumferential surface of the winding shaft. A ratchet wheel is installed on the winding shaft and is matched with the gear. A pawl is installed on the gear and is matched with the ratchet wheel. A rack plate meshing with the gear is installed on one side of the installation frame close to the tip of the marking pen.

[0016] Preferably, vertical shafts symmetrically arranged along its length direction and guiding the paper tape are installed on the fixed frame through bearings, and the vertical shafts corresponding to each fixed frame are located on both sides of the tip of the corresponding marking pen.

[0017] Preferably, a rotating shaft is installed through a bearing at the middle position of the bottom of the installation frame. A supporting frame matched with it is also arranged at the bottom of the installation frame, and the end of the rotating shaft far from the installation frame is installed on the supporting frame by a threaded connection method.

[0018] Preferably, a plurality of support rods are evenly arranged on the supporting frame along its length direction, and the support rods are mounted on the supporting frame by threaded connection, and rubber blocks matching with the mounting frame are mounted at the bottom of the support rods.

[0019] Preferably, a distance sensor and a buzzer alarm are installed on the moving block, and the buzzer alarm is electrically connected to the distance sensor via a central control component.

[0020] Preferably, the central control component includes a central control panel (not shown in the figure) arranged on the mounting frame, buttons arranged on the central control panel, and a central control unit arranged inside the central control panel, wherein the central control unit includes a central control module, a button control module electrically connected to the central control module, a distance sensing module electrically connected to the central control module, and a buzzer alarm module electrically connected to the central control module.

[0021] The button control module is electrically connected to the button, the distance sensing module is electrically connected to the distance sensor, and the buzzer alarm module is electrically connected to the buzzer alarm.

[0022] In a second aspect, a method for detecting bridge displacement during bridge construction is provided, and its use method comprises the following steps: S1: detection preparation, placing a mounting frame under the bridge to be detected, and adjusting the height of the mounting frame so that the distance from the interference block to the bottom of the bridge is a safe distance.

[0023] S2: Installation process: installing the installation frame and the supporting frame on two bridge piers corresponding to the bridge to be inspected.

[0024] S3: Detection processing: the moving block drives the marker pen to draw lines on the paper tape during its movement.

[0025] S4: Data processing, observing the distribution of the lines on the paper tape. The oscillation of the lines reflects the displacement of the bridge.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. In the detection mechanism designed by the present invention, multiple moving blocks can cooperate with each other through marking pens and paper tapes to perform detection and processing on different positions of the bridge, so as to increase the detection data group, reduce the singleness of the detection data, and make the detection data more representative.

[0028] 2. In the bridge displacement detection method for bridge construction designed by the present invention, the resistance block is made to be a certain distance away from the bottom of the bridge (that is, the safe displacement length), so that this section of displacement can offset the displacement of normal shaking of the bridge, thereby avoiding the possibility that the shaking of the bridge under normal displacement is mistaken for abnormal shaking.

[0029] 3. In the detection mechanism designed by the present invention, if the moving rod drives the marking pen to cross the warning line on the paper tape during the movement of the moving block, the bridge undergoes abnormal deformation displacement, that is, the displacement of the bridge exceeds the safe displacement, indicating that the bridge is overloaded. At the same time, the position of the bridge deformation can be determined according to the position of the line on the paper tape that crosses the baseline, and the degree of bridge deformation can be determined according to the height of the line that crosses the baseline, reflecting the data of bridge deformation in many aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional installation structure between the present invention and the bridge pier.

[0031] Figure 2 It is a partial three-dimensional structural schematic diagram of the present invention.

[0032] Figure 3 The present invention Figure 2 A partial enlarged view of point A.

[0033] Figure 4 It is a schematic diagram of the three-dimensional installation structure between the moving block, the distance sensor and the buzzer alarm of the present invention.

[0034] Figure 5 The present invention Figure 4 A partial enlarged view of point B.

[0035] Figure 6 It is a schematic diagram of the three-dimensional installation structure between the rotating shaft, the supporting frame and the support rods of the present invention.

[0036] Figure 7 It is an electrical flow chart of the present invention.

[0037] Figure 8 It is a flow chart of the bridge displacement detection method during bridge construction of the present invention.

[0038] Explanation of the reference numerals: 1. Mounting frame; 11. Expansion screw; 12. Rotating shaft; 13. Supporting frame; 14. Support rod; 15. Rubber block; 16. Distance sensor; 17. Buzzer alarm; 18. Fixed rod; 19. Camera; 10. Indicator light; 2. Detection mechanism; 21. Moving block; 211. Fixed frame; 212. Winding shaft; 213. Gear; 214. Ratchet; 215. Pawl; 216. Rack plate; 217. Vertical shaft; 22. Profile frame; 221. Moving rod; 222. Resistance block; 223. Reset spring; 224. Connecting rod; 23. Marker pen; 24. Paper tape. DETAILED DESCRIPTION

[0039] The following is combined with Figures 1 to 8 This application is described in further detail.

[0040] An embodiment of the present application discloses a bridge displacement detection device and a detection method for bridge construction, which can detect the bridge as a whole simultaneously, increasing the quantity of detection data and making the detection data more representative. At the same time, the device is not in contact with the bridge in the initial state, reducing the possibility of misjudging the detection data.

[0041] Embodiment 1:

[0042] Refer to Figures 1 to 3 , a bridge displacement detection device for bridge construction, including an installation frame 1, and a detection mechanism 2 is arranged on the installation frame 1.

[0043] The detection mechanism 2 includes: a moving block 21, a plurality of which are evenly arranged along the length direction of the installation frame 1, and the moving block 21 is slidably installed on the installation frame 1.

[0044] A U-shaped frame 22, corresponding to the moving block 21 one by one and with the opening downward, is installed on the corresponding moving block 21.

[0045] A marking pen 23, corresponding to the U-shaped frame 22 one by one and arranged on the horizontal section of the U-shaped frame 22, and it can automatically reset.

[0046] A paper tape 24, corresponding to the marking pen 23 one by one and arranged on one side of the tip of the marking pen 23.

[0047] The multiple moving blocks 21 can cooperate with each other through the marking pen 23 and the paper tape 24 to detect different positions of the bridge, so as to increase the detection data group, reduce the singularity of the detection data, and make the detection data more representative.

[0048] Refer to Figure 3 , a moving rod 221 is slidably penetrated through the horizontal section of the U-shaped frame 22. The marking pen 23 extends along the width direction of the horizontal section of the U-shaped frame 22, and the marking pen 23 is clamped at the bottom of the moving rod 221. A抵触块 222 is installed at the top of the moving rod 221. A return spring 223 is sleeved on the moving rod 221. One end of the return spring 223 is installed on the抵触块 222, and the other end of the return spring 223 is installed on the horizontal section of the U-shaped frame 22. A connecting rod 224 is arranged between two adjacent moving blocks 21, and both ends of the connecting rod 224 are respectively installed on the corresponding moving blocks 21.

[0049] Wherein, arc-shaped protrusions matching with the bridge piers are arranged at both ends of the installation frame 1, and expansion screws 11 for fixing the installation frame 1 on the bridge piers are installed on the arc-shaped protrusions (refer to Figure 4), during specific work, the mounting frame 1 is placed under the bridge to be inspected, and the mounting frame 1 is located between the two piers corresponding to the bridge. According to the safety displacement caused by the shaking of a vehicle running on the bridge, the mounting frame 1 is moved up and down, so that the distance between the interference block 222 and the bottom of the bridge is equal to the safety displacement, and then the displacement of the interference block 222 and the bottom of the bridge can offset the displacement of the normal shaking of the bridge, thereby avoiding the possibility that the shaking of the bridge under normal displacement is mistaken for abnormal shaking.

[0050] When the mounting frame 1 is moved to the designated position, the staff uses the existing electric drill to open a threaded hole on the pier that matches the expansion screw 11. After the threaded hole is opened, the arc-shaped protrusion on the mounting frame 1 is placed at the position of the threaded hole on the pier, and then the expansion screw 11 is screwed into the threaded hole, and then the expansion screw 11 is fixed to the pier through the arc-shaped protrusion.

[0051] The present invention selects the night time when there are fewer vehicles for installation during the installation process to avoid the influence of normal shaking of the bridge on the judgment of the distance from the abutment block 222 to the bottom of the bridge, thereby reducing the generation of errors.

[0052] See also Figures 3 to 5 A fixed frame 211 is installed on the side of the moving block 21 close to the tip of the marker pen 23, and a winding shaft 212 is symmetrically arranged along its length direction on the end surface of the fixed frame 211 and away from the corresponding moving block 21. The winding shaft 212 is installed on the fixed frame 211 through a bearing, and the winding shaft 212 rotates.

[0053] A gear 213 is rotatably installed at the bottom of the circumferential surface of the winding shaft 212, a ratchet 214 matching the gear 213 is installed on the winding shaft 212, a pawl 215 matching the ratchet 214 is installed on the gear 213, and a rack plate 216 meshing with the gear 213 is installed on the side of the mounting frame 1 close to the tip of the marker pen 23.

[0054] A reference line is provided on the paper tape 24, and the sum of the distances of a single movement of each moving block 21 on the mounting frame 1 is the length of the bridge to be inspected, that is, during the movement of the moving block 21, the marking pen 23 and the paper tape 24 can be driven to cooperate with each other to inspect the entire bridge. During specific operation, after the installation of the mounting frame 1 is completed, any moving block 21 is driven to slide on the mounting frame 1 through an external drive, and during the sliding of the moving block 21, the connecting rod 224 drives the remaining moving blocks 21 to move, and during the movement of the moving block 21, the marking pen 23 is driven to draw a line on the paper tape 24 through the cooperation of the mold frame 22 and the moving rod 221.

[0055] The return spring 223 serves to return the moving rod 221 during its up and down reciprocating movement.

[0056] During the movement of the moving block 21, the winding shaft 212 is driven to move synchronously. At this time, the pawl 215 locks the ratchet 214, that is, the gear 213 and the winding shaft 212 remain relatively still. During the movement of the winding shaft 212, the gear 213 and the rack plate 216 cooperate with each other to rotate, and then the two corresponding winding shafts 212 on the same moving block 21 respectively retract and release the paper tape 24, and then the marking pen 23 can draw lines on the paper tape 24.

[0057] When the moving block 21 has completed a single stroke, the moving block 21 is reset. During the resetting process, the moving block 21 drives the winding shaft 212 to reset. At this time, the pawl 215 and the ratchet wheel 214 are released from the limit, that is, the gear 213 engages with the rack plate 216 and rotates during the movement. At this time, the gear 213 no longer drives the winding shaft 212 to rotate, that is, the paper tape 24 is in a stationary state during the resetting process of the moving block 21.

[0058] According to the markings on the paper tape 24, if the markings do not cross the warning line, it indicates that the bridge is normal at this time and the bridge has not undergone abnormal displacement. If the moving rod 221 drives the marking pen 23 to cross the warning line on the paper tape 24 during the movement of the moving block 21, the bridge has undergone abnormal deformation displacement, that is, the displacement of the bridge at this time exceeds the safe displacement, indicating that the bridge is overloaded at this time. At the same time, the position of the bridge deformation can be determined according to the position of the markings on the paper tape 24 that crosses the baseline, and the degree of deformation of the bridge can be determined according to the height of the markings that cross the baseline, which reflects the data of bridge deformation in many aspects.

[0059] Replay Figure 3 A vertical shaft 217 symmetrically arranged along its length direction and guiding the paper tape 24 is installed on the fixed frame 211 through a bearing, and the vertical shaft 217 corresponding to each fixed frame 211 is located on both sides of the pen tip of the corresponding marker pen 23.

[0060] As the paper tape 24 is wound, the two winding shafts 212 corresponding to the same moving block 21 have the same thickness only at a certain moment, and the two vertical shafts 217 cooperate with each other to ensure that the paper tape 24 in contact with the tip of the marker pen 23 does not tilt and always remains perpendicular to the marker pen 23, avoiding the paper tape 24 from tilting and failing to contact the tip of the marker pen 23, thereby improving the marking effect of the marker pen 23.

[0061] See also Figure 6When the span of the bridge between the two piers is long, the middle part of the bridge between the piers may fall due to gravity due to rain, resulting in a slightly curved structure of the bridge. At this time, the bending degree of the mounting frame 1 can be changed by the rotating shaft 12. Specifically, the rotating shaft 12 is installed at the middle position of the bottom of the mounting frame 1 through a bearing, and a supporting frame 13 matched with it is also provided at the bottom of the mounting frame 1, and the end of the rotating shaft 12 away from the mounting frame 1 is installed on the supporting frame 13 by a threaded connection.

[0062] The supporting frame 13 is provided with arc-shaped protrusions matching with the bridge piers at both ends, and the arc-shaped protrusions are equipped with expansion screws 11 for fixing the supporting frame 13 on the bridge piers. The supporting frame 13 is placed under the bridge to be inspected, so that the supporting frame 13 is located between the two bridge piers corresponding to the bridge, and under the supporting frame 13, and the mounting frame 1 is provided with multiple ones according to the distance between the bridge piers to adapt to bridge piers with different spacings. During specific operation, the rotating shaft 12 is rotated according to the bending degree of the bridge. During the rotation of the rotating shaft 12, it moves downward on the supporting frame 13 through a threaded connection. During the downward movement of the rotating shaft 12, the middle part of the mounting frame 1 is driven to move downward by a certain distance. At this time, since the two ends of the mounting frame 1 have been fixed on the bridge piers, the mounting frame 1 is an arc-shaped structure with an opening upward, and is consistent with the shape of the bridge at this time, that is, the distance between each point on the bottom of the bridge and the projection of each point to the point on the mounting frame 1 is the same.

[0063] The bending degree of the mounting frame 1 will not affect the movement effect of each moving block 21, and the spacing between the gear teeth on the gear 213 and the teeth on the rack plate 216 is large enough to ensure that when the mounting frame 1 is bent to a certain extent, the gear 213 and the rack plate 216 can continue to maintain a meshing state.

[0064] Continue reading Figure 6 A plurality of support rods 14 are evenly arranged on the supporting frame 13 along its length direction, and the support rods 14 are installed on the supporting frame 13 by threaded connection. A rubber block 15 matching the mounting frame 1 is installed at the bottom of the support rods 14.

[0065] When the mounting rack 1 is bent to a certain degree, the support rod 14 is rotated, and the support rod 14 moves upward synchronously during the rotation process. During the upward movement process, the support rod 14 cooperates with the rubber block 15 to support the mounting rack 1, so as to ensure that the mounting rack 1 is not prone to breakage due to a too long span. The support block can increase the direct contact area between the support block and the mounting rack 1, thereby ensuring the stability of the mounting rack 1.

[0066] See also Figure 4 as well as Figure 7In order to reduce the time for observing the paper tape 24, the distance sensor 16 and the buzzer alarm 17 provided by the present invention cooperate with each other to determine whether the bridge section corresponding to the paper tape 24 has abnormal displacement before observing the paper tape 24. Specifically, the distance sensor 16 and the buzzer alarm 17 are installed on the moving block 21, and the buzzer alarm 17 is electrically connected to the distance sensor 16 through the central control component.

[0067] The central control component includes a central control panel (not shown in the figure) set on the mounting frame 1, buttons set on the central control panel, and a central control unit set inside the central control panel, wherein the central control unit includes a central control module, a button control module electrically connected to the central control module, a distance sensor module electrically connected to the central control module, and a buzzer alarm module electrically connected to the central control module.

[0068] The button control module is electrically connected to the button, the distance sensing module is electrically connected to the distance sensor 16 , and the buzzer alarm module is electrically connected to the buzzer alarm 17 .

[0069] During specific operation, the button is pressed, and the button control module receives the button-open signal and transmits the signal to the central control module. At this time, the central control module is opened. When the length of the moving rod 221 moving downward is greater than the safe displacement, the distance sensor 16 receives the signal and transmits the signal to the distance sensing module. The distance sensing module processes the received signal and transmits it to the central control module. After receiving the signal, the central control module processes it and transmits it to the buzzer alarm module. At this time, the buzzer alarm module processes the signal after receiving the signal and transmits it to the buzzer alarm 17. At this time, the buzzer alarm 17 alarms, and then in the subsequent inspection of the paper tape 24, it is only necessary to check the paper tape 24 corresponding to the buzzer alarm 17, and the paper tape 24 corresponding to the buzzer alarm 17 that has not alarmed does not need to be checked, thereby reducing the time and tediousness of checking the paper tape 24.

[0070] Example 2: Reference Figure 3 as well as Figure 4On the basis of the first embodiment, an L-shaped fixed rod 18 is installed on the moving block 21, and a camera 19 is installed near the vertical section of the fixed rod 18. An indicator light 10 is installed on the marker pen 23. During specific operation, the provided camera 19 can monitor and process the marking of the marker pen 23 during the bridge detection process, and then the staff can also observe the marking situation on the paper tape 24 on the display screen coordinated with the camera 19, without the need for the tediousness of subsequent manual detection of the paper tape 24. At the same time, the method of manually monitoring the paper tape 24 is also indispensable to avoid the possibility that the marking situation of the paper tape 24 cannot be observed when the camera 19 fails. The two methods cooperate with each other to play a double guarantee role in monitoring the marking situation. At the same time, the marker pen 23 drives the indicator light 10 to swing back and forth during the movement, and then the camera 19 can also record the reciprocating swing of the indicator light 10, so that the displacement amplitude of the bridge can be obtained according to the amplitude of the reciprocating swing of the indicator light 10, and the detection data can be further recorded and processed.

[0071] Finally, see Figure 8 A method for detecting bridge displacement during bridge construction includes the following steps: S1: detection preparation, placing a mounting frame 1 under the bridge to be detected, and making the mounting frame 1 between two piers corresponding to the bridge, and moving the mounting frame 1 up and down according to the safety displacement caused by the shaking of a vehicle traveling on the bridge, so that the distance between the interference block 222 and the bottom of the bridge is equal to the safety displacement.

[0072] S2: Installation process. When the mounting frame 1 is moved to the designated position, the staff uses the existing electric drill to open a threaded hole on the pier that matches the expansion screw 11. After the threaded hole is opened, the arc-shaped protrusion on the mounting frame 1 is placed at the position of the threaded hole on the pier, and then the expansion screw 11 is screwed into the threaded hole, and then the expansion screw 11 is fixed to the mounting frame 1 on the pier through the arc-shaped protrusion.

[0073] S3: Detection processing. When the installation of the mounting frame 1 is completed, any one of the moving blocks 21 is driven to slide on the mounting frame 1 through an external drive. During the sliding process of the moving block 21, the connecting rod 224 drives the remaining moving blocks 21 to move. During the movement of the moving block 21, the mold frame 22 and the moving rod 221 cooperate with each other to drive the marking pen 23 to draw a line on the paper tape 24.

[0074] S4: Data processing, according to the markings on the paper tape 24, if the markings do not cross the warning line, it means that the bridge is normal at this time and the bridge has not undergone abnormal displacement. If the moving rod 221 drives the marking pen 23 on the paper tape 24 to cross the warning line during the movement of the moving block 21, the bridge undergoes abnormal deformation displacement, that is, the displacement of the bridge at this time exceeds the safe displacement, indicating that the bridge is overloaded at this time.

[0075] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bridge displacement detection device for bridge construction, comprising a mounting frame (1), characterized in that: The mounting frame (1) is provided with a detection mechanism (2), wherein: The detection mechanism (2) comprises: a plurality of moving blocks (21) evenly arranged along the length direction of the mounting frame (1), and the moving blocks (21) are slidably mounted on the mounting frame (1); The shaped frame (22) corresponds to the moving block (21) one by one and has an opening facing downward, and is mounted on the corresponding moving block (21); The marking pen (23) corresponds to the mold frame (22) one by one and is arranged on the horizontal section of the mold frame (22), and automatically resets; A paper tape (24) corresponding to the marking pen (23) one by one and arranged on one side of the tip of the marking pen (23); A moving rod (221) is slidably provided on the horizontal section of the shaped frame (22), a marking pen (23) extends along the width direction of the horizontal section of the shaped frame (22), and the marking pen (23) is clamped on the bottom of the moving rod (221), a resisting block (222) is installed on the top of the moving rod (221), a return spring (223) is sleeved on the moving rod (221), one end of the return spring (223) is installed on the resisting block (222), and the other end of the return spring (223) is installed on the horizontal section of the shaped frame (22), a connecting rod (224) is provided between two adjacent moving blocks (21), and the two ends of the connecting rod (224) are respectively installed on the corresponding moving blocks (21); A fixed frame (211) is installed on the side of the moving block (21) close to the tip of the marker pen (23), and a winding shaft (212) is symmetrically arranged along the length direction of the fixed frame (211) on the end surface of the fixed frame (211) and away from the corresponding moving block (21), and the winding shaft (212) is installed on the fixed frame (211) through a bearing, and the winding shaft (212) rotates. A gear (213) is rotatably mounted on the bottom of the circumferential surface of the winding shaft (212); a ratchet (214) matched with the gear (213) is mounted on the winding shaft (212); a ratchet pawl (215) matched with the ratchet (214) is mounted on the gear (213); and a rack plate (216) meshing with the gear (213) is mounted on one side of the mounting frame (1) close to the tip of the marker pen (23); The fixed frame (211) is provided with a vertical shaft (217) symmetrically arranged along its length direction and guiding the paper tape (24) through a bearing, and the vertical shaft (217) corresponding to each fixed frame (211) is located on both sides of the pen tip of the corresponding marking pen (23); A rotating shaft (12) is installed at the middle position of the bottom of the mounting frame (1) via a bearing, and a supporting frame (13) matching with the rotating shaft (1) is also provided at the bottom of the mounting frame (1), and one end of the rotating shaft (12) away from the mounting frame (1) is installed on the supporting frame (13) via a threaded connection; The mounting frame (1) is provided with arc-shaped protrusions matching with the bridge piers at both ends, and the arc-shaped protrusions are provided with expansion screws (11) for fixing the mounting frame (1) on the bridge piers. The mounting frame (1) is placed under the bridge to be inspected, and the mounting frame (1) is located between two bridge piers corresponding to the bridge. The supporting frame (13) is also provided with arc-shaped protrusions matching with the bridge piers at both ends, and the arc-shaped protrusions are equipped with expansion screws (11) for fixing the supporting frame (13) on the bridge piers. The supporting frame (13) is placed under the bridge to be inspected, so that the supporting frame (13) is located between two bridge piers corresponding to the bridge, and the supporting frame (13) is located under the installation frame (1). The installation frame (1) is provided with a plurality of them according to the distance between the bridge piers to adapt to bridge piers with different spacings. The rotating shaft (12) is rotated according to the curvature of the bridge. During the rotation process, the rotating shaft (12) moves downward on the supporting frame (13) through a threaded connection. During the downward movement of the rotating shaft (12), the middle part of the installation frame (1) is driven to move downward by a certain distance. The two ends of the installation frame (1) are fixed on the bridge piers and present an arc-shaped structure with an opening facing upward, which is consistent with the shape of the bridge at this time.

2. A bridge displacement detection device for bridge construction according to claim 1, characterized in that: The supporting frame (13) is evenly provided with a plurality of supporting rods (14) along its length direction, and the supporting rods (14) are installed on the supporting frame (13) by means of threaded connection, and a rubber block (15) matching with the mounting frame (1) is installed at the bottom of the supporting rod (14).

3. The bridge displacement detection device for bridge construction according to claim 1 is characterized by: The moving block (21) is mounted with a distance sensor (16) and a buzzer alarm (17), and the buzzer alarm (17) is electrically connected to the distance sensor (16) via a central control component.

4. The bridge displacement detection device for bridge construction according to claim 3 is characterized by: The central control assembly comprises a central control panel arranged on a mounting frame (1), buttons arranged on the central control panel, and a central control unit arranged inside the central control panel, wherein the central control unit comprises a central control module, a button control module electrically connected to the central control module, a distance sensing module electrically connected to the central control module, and a buzzer alarm module electrically connected to the central control module; the button control module is electrically connected to the buttons, the distance sensing module is electrically connected to the distance sensor (16), and the buzzer alarm module is electrically connected to the buzzer alarm (17).

5. A method for detecting bridge displacement during bridge construction, comprising a bridge displacement detection device for bridge construction as claimed in any one of claims 1 to 4, characterized in that: The method of use includes the following steps: S1: Inspection preparation, placing the mounting frame (1) under the bridge to be inspected, and adjusting the height of the mounting frame (1) so that the distance between the abutment block (222) and the bottom of the bridge is a safe distance; S2: Installation process, installing the installation frame (1) and the supporting frame (13) on two bridge piers corresponding to the bridge to be inspected; S3: Detection processing, the moving block (21) drives the marking pen (23) to draw a line on the paper tape (24) during the movement; S4: Data processing, observing the distribution of the lines on the paper tape (24), and the oscillation of the lines reflects the displacement of the bridge.

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