Steel-concrete composite beam construction pier strain monitoring device

Abstract

The invention relates to the technical field of bridge construction strain testing, and discloses a steel-concrete composite beam construction pier strain monitoring device which comprises two mounting frames, strain testers are mounted on the mounting frames, and the strain testers are connected with a plurality of strain gauges through wires; the climbing assembly is used for driving the two mounting frames to climb on the bridge pier; the mounting rack is provided with a sheet pressing assembly which is used for pressing a strain sheet on the outer wall of the bridge pier. And the dust removing assembly is used for removing dust on the outer wall of the pier before the strain gauges make contact with the outer wall of the pier. Through cooperation of the climbing assembly and the sheet pressing assembly, an operator can climb on the outer wall of a pier by using two mounting frames, so that two strain testers and strain sheets above are sent to a test point position of the pier, and then the multiple strain sheets abut against the outer wall of the pier through two mounting plates, so that strain monitoring is performed; and the operation of manually pasting the strain gauges is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction strain testing, and in particular to a pier strain monitoring device for steel-concrete composite beam construction. Background Art

[0002] Steel-concrete composite beams leverage the advantages of steel in tension and concrete in compression, offering advantages such as light weight, good seismic resistance, and high stiffness. They are widely used in various bridge projects. The construction process involves first constructing the pier foundation and pier body, then prefabricating the steel beams and concrete deck in a factory. The steel beams are hoisted and positioned on-site, and the deck is installed, secured with connectors, and wet joints are cast to form the entire structure. Construction is completed through system conversion, monitoring, and the construction of ancillary works. During construction, the forces acting on the piers are complex and constantly changing due to the increasing number of structures above them. Continuous strain monitoring of the piers is essential to timely understand the actual forces acting on various parts of the structure, determine whether they exceed the design allowable range, and effectively monitor risks. Once strain anomalies are detected, timely measures can be taken to adjust the construction plan and avoid serious safety accidents such as bridge collapse and structural damage. Existing strain monitoring techniques typically use strain gauges to monitor the piers. In practice, workers attach strain gauges to the locations to be monitored and then observe the strain data using a strain gauge.

[0003] However, the existing technology has the following problems: In the existing technology, when affixing strain gauges on bridge piers, due to the high height of some bridge piers, when the strain gauges need to be affixed to the middle part of the bridge pier, the operators may need to hang or climb. The operators use hanging equipment to hang in the air, or use climbing devices to climb on the bridge pier, move to the bridge pier monitoring point, and then manually affix the strain gauges. The operation has a high safety risk, high manpower and material resources, and is time-consuming. Summary of the Invention

[0004] The purpose of the present invention is to provide a strain monitoring device for bridge piers in steel-concrete composite beam construction in order to solve the above problems, in order to overcome the defect of the prior art that it is inconvenient to stick strain gauges on bridge piers, as described below.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: The present invention provides a strain monitoring device for bridge piers under construction of steel-concrete composite beams, comprising: two mounting frames, on which strain testers are mounted, and the strain testers are connected to a plurality of strain gauges via wires; a climbing assembly, for driving the two mounting frames to climb on the bridge pier, the climbing assembly comprising two motors and two rotating shafts, the two rotating shafts being rotatably mounted on the tops of the two mounting frames respectively, the two motors being connected to the two mounting frames respectively, the output ends of the two motors being transmission-connected to the two rotating shafts respectively, a group of rollers being connected to the outer walls of the rotating shafts, two connecting springs being connected to one of the mounting frames, a card block being connected to one end of the connecting spring away from the mounting frame connected thereto, and two card slots being connected to the other mounting frame; a pressing plate assembly being provided on the mounting frame, for pressing the strain gauge against the outer wall of the bridge pier; and a dust cleaning assembly being used to clean dust on the outer wall of the bridge pier before the strain gauge contacts the outer wall of the bridge pier.

[0006] Preferably, the two clamping blocks are respectively inserted into two clamping slots, and the clamping slots are threadedly connected with adjusting wires.

[0007] Preferably, two polished rods are slidably connected to one of the mounting frames, the two polished rods are slidably connected to the top of the other mounting frame, and two guide wheels are rotatably installed on the bottom of the mounting frame.

[0008] Preferably, the pressing assembly includes a cylinder, a square tube and a mounting plate, the cylinder is installed on the mounting frame, the square tube is connected to the output end of the cylinder, and the mounting plate is connected to the side of the square tube away from the cylinder.

[0009] Preferably, the pressing plate assemblies on the two mounting frames are mirror-imaged, and the multiple strain gauges of the two strain testers are respectively connected to the two mounting plates.

[0010] Preferably, the tabletting assembly also includes two air bags, two resistance rods, two air pipes, a liquid tank and a plurality of nozzles, the two air bags are respectively connected to the inner walls at both ends of the square tube, the two resistance rods are respectively connected to the side of the two air bags away from the cylinder, the liquid tank is connected to the inside of the square tube, the two air pipes are connected to the two ends of the liquid tank, and the ends of the two air pipes away from the liquid tank are respectively connected to the two air bags, the plurality of nozzles are all connected to the liquid tank, and the plurality of nozzles all pass through the square tube and the side of the mounting plate away from the cylinder.

[0011] Preferably, the dust cleaning assembly includes a fixed cover, a telescopic plate, a slide plate, a grinding block and two connecting rods. The fixed cover is connected to the square tube through a bracket, the telescopic plate is slidably connected to the inner wall of the mounting frame, the slide plate is slidably connected to the telescopic plate, the grinding block is slidably connected to the inner wall of the slide plate, one end of the two connecting rods is hinged to the fixed cover, and the other end of the two connecting rods is hinged to the top of the slide plate.

[0012] Preferably, the two cleaning components on the two mounting frames are mirror-imaged, and a plurality of reset springs are arranged inside the fixed cover, one end of each of the reset springs is connected to the inner wall of the fixed cover, and the other end of each of the reset springs is connected to one end of the telescopic plate located inside the fixed cover.

[0013] Preferably, the dust cleaning assembly also includes a trough plate and a sliding shaft, the trough plate is connected to the side of the grinding block close to the fixed cover, the bottom of the trough plate passes through the slide plate, a square groove is provided on the telescopic plate, the sliding shaft is installed in the square groove of the telescopic plate, a wavy sliding groove is provided on the trough plate, and the sliding shaft is slidably connected to the wavy sliding groove of the trough plate.

[0014] The beneficial effects are: 1. The strain monitoring device for bridge piers under steel-concrete composite beam construction uses a climbing assembly and a pressing assembly to enable workers to climb the outer wall of the pier using two mounting frames, thereby delivering two strain testers and the strain gauges above to the test points of the pier. Multiple strain gauges are then pressed against the outer wall of the pier through two mounting plates to perform strain monitoring. This reduces the need for manual pasting of strain gauges, making the operation safer, requiring less manpower and material resources, and improving the efficiency of strain gauge arrangement. The liquid tanks are configured so that before the strain gauges on both sides of the pier come into contact with the pier, the two liquid tanks spray a protective coating agent on the contact surface between the pier and the strain gauge through multiple nozzles, forming a protective coating layer, thereby protecting the strain gauges and improving the measurement accuracy of the strain gauges.

[0015] 2. The strain monitoring device for bridge piers under steel-concrete composite beam construction, through the provision of a dust cleaning component, enables the grinding block to move upward to grind the contact surface between the bridge pier and the strain gauge before the strain gauge contacts the bridge pier, thereby removing dust and mud on the contact surface between the bridge pier and the strain gauge, and preventing dust and mud from affecting the measurement accuracy of the strain gauge; through the cooperation of the groove plate and the sliding shaft, the grinding block can also enhance the grinding effect through horizontal reciprocating movement when moving upward for grinding, thereby ensuring the cleanliness of the contact surface between the bridge pier and the strain gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2It is a schematic structural diagram of the mounting frame of the present invention; Figure 3 is a schematic structural diagram of the climbing assembly of the present invention; Figure 4 It is a schematic diagram of the connecting spring structure of the present invention; Figure 5 2 is a schematic structural diagram of a tablet pressing assembly according to the present invention; Figure 6 It is a schematic diagram of the mounting plate structure of the present invention; Figure 7 It is a schematic diagram of the elastic rod structure of the present invention; Figure 8 It is a schematic structural diagram of the dust cleaning component of the present invention; Figure 9 It is a schematic diagram of the skateboard structure of the present invention; Figure 10 It is a schematic diagram of the slot plate structure of the present invention.

[0018] The description of the accompanying drawings is as follows: 1. Mounting frame; 2. Climbing assembly; 21. Motor; 22. Rotating shaft; 23. Roller; 24. Connecting spring; 25. Block; 26. Slot; 27. Adjusting wire; 28. Polished rod; 29. Guide wheel; 3. Pressing plate assembly; 31. Cylinder; 32. Square tube; 33. Mounting plate; 34. Air bag; 35. Resistance rod; 36. Air pipe; 37. Liquid tank; 38. Nozzle; 4. Cleaning assembly; 41. Fixed cover; 42. Telescopic plate; 43. Slide plate; 44. Grinding block; 45. Connecting rod; 46. Slot plate; 47. Sliding shaft; 5. Strain tester; 6. Strain gauge. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other implementations obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

[0020] Example 1, please refer to Figure 1 - Figure 10, a strain monitoring device for bridge piers during construction of steel-concrete composite beams, comprising: two mounting frames 1, a strain tester 5 mounted on the mounting frames 1, the strain tester 5 being connected to a plurality of strain gauges 6 via wires, the strain tester 5 and the strain gauge 6 being prior art, and being strain testing equipment well known to those skilled in the art, therefore, their specific structures and working principles will not be elaborated on herein; a climbing assembly 2, for driving the two mounting frames 1 to climb on the bridge piers, the climbing assembly 2 comprising two motors 21 and two rotating shafts 22, the two rotating shafts 22 being rotatably mounted on the tops of the two mounting frames 1, the two motors 21 being connected to the two mounting frames 1, respectively, the output ends of the two motors 21 being transmission-connected to the two rotating shafts 22, the outer wall of the rotating shaft 22 being connected to a group of rollers 23, the rollers 23 being made of a material with a high friction coefficient and having a relatively good friction relationship with the outer wall of the pier. Large friction force, one of the mounting frames 1 is connected to two connecting springs 24, and the end of the connecting spring 24 away from the mounting frame 1 connected thereto is connected to a card block 25, and the other mounting frame 1 is connected to two card slots 26, and the two card blocks 25 are respectively inserted into the two card slots 26, and the card slots 26 are threaded with adjustment wires 27. The two mounting frames 1 can form a state of hugging the outer wall of the pier, and the two groups of rollers 23 on the two mounting frames 1 remain in contact with the two outer walls of the pier. After starting the two motors 21, the two motors 21 drive the two groups of rollers 23 to rotate through the two rotating shafts 22. When the two groups of rollers 23 rotate, the friction force is used to drive the two mounting frames 1 to move upward on the pier, so that the two mounting frames 1 drive the two strain testers 5 and multiple strain gauges 6 to move upward, thereby transporting the strain testers 5 and multiple strain gauges 6 to the test point.

[0021] Furthermore, two light rods 28 are slidably connected to one of the mounting frames 1, and the two light rods 28 are slidably connected to the top of the other mounting frame 1. The two light rods 28 serve as temporary supports, thereby improving the overall stability of the two mounting frames 1. Two guide wheels 29 are rotatably installed at the bottom of the mounting frame 1. The two guide wheels 29 at the bottom of the mounting frame 1 serve as a support to prevent the mounting frame 1 from tilting.

[0022] Furthermore, a pressing plate assembly 3 is provided on the mounting frame 1 for pressing the strain gauge 6 against the outer wall of the pier; the pressing plate assembly 3 includes a cylinder 31, a square tube 32 and a mounting plate 33. The cylinder 31 is installed on the mounting frame 1 through the square tube 32, and the mounting plate 33 is connected to the side of the square tube 32 away from the cylinder 31. The pressing plate assemblies 3 on the two mounting frames 1 are mirror-imaged. The multiple strain gauges 6 of the two strain testers 5 are respectively connected to the two mounting plates 33. A pressure sensor is provided in the cylinder 31. When the pressure at the output end of the cylinder 31 reaches the limit, The cylinder 31 enters the pressure-maintaining state, thereby ensuring that the strain gauge 6 presses against the bridge pier with a fixed pressure and maintains contact with the bridge pier. Through the cooperation of the climbing component 2 and the pressing component 3, the operator can use the two mounting frames 1 to climb on the outer wall of the bridge pier, thereby delivering the two strain testers 5 and the strain gauge 6 above to the test point of the bridge pier, and then use the two mounting plates 33 to press multiple strain gauges 6 against the outer wall of the bridge pier to perform strain monitoring, reducing the operation of manually pasting the strain gauge 6, making the operation safer, and requiring less manpower and material resources, which also improves the efficiency of arranging the strain gauge 6.

[0023] In addition, the tabletting assembly 3 also includes two air bags 34, two resistance rods 35, two air pipes 36, a liquid tank 37 and a plurality of nozzles 38. The two air bags 34 are respectively connected to the inner walls at both ends of the square tube 32, the two resistance rods 35 are respectively connected to the side of the two air bags 34 away from the cylinder 31, the liquid tank 37 is connected to the inside of the square tube 32, the two air pipes 36 are connected to both ends of the liquid tank 37, and the ends of the two air pipes 36 away from the liquid tank 37 are respectively connected to the two air bags 34, and the plurality of nozzles 38 are all connected to the liquid tank 37. The plurality of nozzles 38 all penetrate the square tube 32 and the side of the mounting plate 33 away from the cylinder 31. The liquid tank 37 is filled with a protective coating agent. After the air enters the liquid tank 37, the liquid tank 37 sprays the protective coating agent through the plurality of nozzles 38 according to the positive pressure principle. Alternating with the multiple strain gauges 6, the multiple nozzles 38 spray the protective coating agent into atomized form onto the outer wall of the pier, so that before the multiple strain gauges 6 come into contact with the pier, the contact surface between the pier and the strain gauge 6 can be covered with a layer of protective coating agent. The protective coating agent can form a protective coating between the strain gauge 6 and the pier. The protective coating has good weather resistance, water resistance and electrical insulation properties, and can effectively protect the strain gauge 6, thereby improving the service life and measurement accuracy of the strain gauge 6. Through the provision of the liquid tank 37, the two liquid tanks 37 spray the protective coating agent onto the contact surface between the pier and the strain gauge 6 through the multiple nozzles 38 before the strain gauges 6 on both sides of the pier come into contact with the pier, forming a protective coating, thereby protecting the strain gauge 6 and improving the measurement accuracy of the strain gauge 6.

[0024] It is worth noting that the dust cleaning component 4 is used to clean the dust on the outer wall of the pier before the strain gauge 6 contacts the outer wall of the pier. The dust cleaning component 4 includes a fixed cover 41, a telescopic plate 42, a slide plate 43, a grinding block 44 and two connecting rods 45. The fixed cover 41 is connected to the square tube 32 through a bracket, the telescopic plate 42 is slidably connected to the inner wall of the mounting frame 1, the slide plate 43 is slidably connected to the telescopic plate 42, and the grinding block 44 is slidably connected to the inner wall of the slide plate 43. One end of the two connecting rods 45 is hinged to the fixed cover 41, and the other end of the two connecting rods 45 is hinged to the top of the slide plate 43. The two dust cleaning components 4 on the two mounting frames 1 are mirror-imaged. A plurality of return springs are provided inside the fixed cover 41. One end of the plurality of return springs is connected to the inner wall of the fixed cover 41, and the other end of the plurality of return springs is connected to one end of the telescopic plate 42 located inside the fixed cover 41. The cylinder 31 drives After the square tube 32 is reset, the telescopic plate 42 is reset by the elastic force of multiple reset springs. While the mounting plate 33 drives the multiple strain gauges 6 to approach the bridge pier, the grinding block 44 continuously moves upward to grind the contact surface between the bridge pier and the strain gauge 6, thereby grinding off the dust and mud on the bridge pier. The presence of dust and mud may change the stress state of the strain gauge 6. When the bridge pier is deformed, the uneven distribution of dust and mud may cause the strain gauge 6 to be subjected to uneven force, resulting in deviations in the measurement results, which cannot truly reflect the actual strain of the bridge pier, thereby reducing the measurement accuracy. Through the setting of the cleaning component 4, the grinding block 44 can grind the contact surface between the bridge pier and the strain gauge 6 by moving upward before the strain gauge 6 contacts the bridge pier, thereby removing the dust and mud on the contact surface between the bridge pier and the strain gauge 6, and avoiding the dust and mud from affecting the measurement accuracy of the strain gauge 6.

[0025] The bottom of the groove plate 46 passes through the slide plate 43, and the telescopic plate 42 is provided with a square groove. The slide shaft 47 is installed in the square groove of the telescopic plate 42. The groove plate 46 is provided with a wavy slide groove, and the slide shaft 47 is slidably connected to the wavy slide groove of the groove plate 46. During the upward movement of the groove plate 46, the wavy slide groove of the groove plate 46 slides upward along the slide shaft 47, so that the slide shaft 47 moves the groove plate 46 back and forth, and the groove plate 46 drives the grinding block 44 to move back and forth horizontally, thereby achieving the effect of the grinding block 44 being able to perform a small horizontal reciprocating movement while moving upward. Through the cooperation of the groove plate 46 and the slide shaft 47, the grinding block 44 can also enhance the grinding effect by horizontal reciprocating movement when moving up for grinding, thereby ensuring the cleanliness of the contact surface between the bridge pier and the strain gauge 6.

[0026] The two mounting brackets 1 are then connected to the outer wall of the pier by the two light rods 28. 8 plays a temporary supporting role, thereby improving the overall stability of the two mounting frames 1. After the two motors 21 are started, the two motors 21 drive the two sets of rollers 23 to rotate through the two rotating shafts 22. When the two sets of rollers 23 rotate, the friction force is used to drive the two mounting frames 1 to move upward on the bridge pier, so that the two mounting frames 1 drive the two strain testers 5 and multiple strain gauges 6 to move upward. The two guide wheels 29 at the bottom of the mounting frame 1 play a supporting role to prevent the mounting frame 1 from tilting. After moving to the specified position, the two cylinders 31 are started. Taking one of the pressing plate assemblies 3 as an example, after the cylinder 31 is started, it drives the square tube 32 to move in the direction close to the bridge pier. The square tube 32 drives the mounting plate 33 to move synchronously, so that the multiple strain gauges 6 on the mounting plate 33 continue to approach the bridge pier until they are against the outer wall of the bridge pier. A pressure sensor is provided in the cylinder 31. When the pressure on the output end of the cylinder 31 reaches the limit, the cylinder 31 enters the pressure maintaining state, thereby ensuring that the strain gauge 6 presses against the bridge pier with a fixed pressure and keeps fitting with the bridge pier;As the square tube 32 moves, the square tube 32 drives the two air bags 34 and the liquid tank 37 inside it to move synchronously. The air bags 34 drive the resistance rods 35 to move synchronously. Before the strain gauge 6 contacts the bridge pier, the two resistance rods 35 first contact the bridge pier, so that the two resistance rods 35 are subjected to the reverse thrust of the bridge pier and stop moving. As the two air bags 34 continue to move, the two resistance rods 35 squeeze the two air bags 34, so that the two air bags 34 inject air into the liquid tank 37 through the air pipe 36 respectively. The liquid tank 37 is equipped with a protective coating. After the air enters the liquid tank 37, the liquid tank 37 sprays the protective coating agent through multiple nozzles 38 based on the positive pressure principle. The multiple nozzles 38 are alternately arranged with the multiple strain gauges 6. The multiple nozzles 38 spray the protective coating agent into atomized form onto the outer wall of the pier, so that before the multiple strain gauges 6 come into contact with the pier, the contact surface between the pier and the strain gauges 6 can be covered with a layer of protective coating agent. The protective coating agent can form a protective coating between the strain gauges 6 and the pier. The protective coating has good weather resistance, water resistance and electrical insulation properties. It can effectively protect the strain gauge 6, thereby improving the service life and measurement accuracy of the strain gauge 6. When installing two mounting frames 1 from the top of the pier, the same principle is used to operate, and two motors 21 control two sets of rollers 23 to drive the two mounting frames 1 downward. Through the cooperation of the climbing component 2 and the pressing component 3, the operator can use the two mounting frames 1 to climb the outer wall of the pier, thereby delivering the two strain testers 5 and the strain gauge 6 above to the test point of the pier. Then, the multiple strain gauges 6 are pressed against the outer wall of the pier through the two mounting plates 33 to perform strain monitoring. This reduces the operation of manually pasting the strain gauges 6, making the operation safer, and reducing the manpower and material resources invested, and also improving the efficiency of the arrangement of the strain gauges 6. Through the provision of the liquid tank 37, the two liquid tanks 37 spray the protective coating agent on the contact surface between the pier and the strain gauge 6 through multiple nozzles 38 before the strain gauges 6 on both sides of the pier come into contact with the pier, forming a layer of protective coating, thereby protecting the strain gauge 6 and improving the measurement accuracy of the strain gauge 6.

[0027] Taking one of the dust cleaning components 4 as an example, the square tube 32 moves while driving the fixed cover 41 to move synchronously, so that the fixed cover 41 drives the telescopic plate 42 and the slide plate 43 above it to move in the direction close to the bridge pier. The grinding block 44 on the slide plate 43 keeps a close distance from the bridge pier before the square tube 32 starts to move. After the square tube 32 starts to move, the grinding block 44 directly contacts the outer wall of the bridge pier, so that the grinding block 44 stops moving horizontally. The grinding block 44 drives the slide plate 43 and the telescopic plate 42 to stop moving horizontally, so that the telescopic plate 42 shrinks in the fixed cover 41, and the distance between the slide plate 43 and the fixed cover 41 is constantly getting closer, so that the two connecting rods 45 between the slide plate 43 and the fixed cover 41 are constantly tilted. The two connecting rods 45 are tilted. During the process, the slide plate 43 is driven to slide upward on the telescopic plate 42, so that the slide plate 43 drives the grinding block 44 to move upward. The contact surface between the grinding block 44 and the bridge pier is set to a rough grinding surface. The grinding block 44 moves upward while closely adhering to the outer wall of the bridge pier, and can rub the outer wall of the bridge pier, so that the mounting plate 33 drives multiple strain gauges 6 to approach the bridge pier. At the same time, the grinding block 44 continuously moves upward to grind the contact surface between the bridge pier and the strain gauge 6, thereby grinding off the dust and mud on the bridge pier. The presence of dust and mud may change the stress state of the strain gauge 6. When the bridge pier is deformed, the uneven distribution of dust and mud may cause the strain gauge 6 to be subjected to uneven force, resulting in deviation in the measurement result, which cannot truly reflect the actual strain condition of the bridge pier. This reduces the measurement accuracy. When the grinding block 44 moves up until it is out of the motion track of the multiple strain gauges 6, the multiple nozzles 38 start to spray the protective coating agent. After the multiple strain gauges 6 are against the bridge pier, the grinding block 44 also stops moving. After the strain monitoring is completed, the cylinder 31 drives the square tube 32 to reset, and the telescopic plate 42 is reset by the elastic force of multiple reset springs, and the slide plate 43 is also reset accordingly; the grinding block 44 drives the groove plate 46 to move up when moving up. During the process of the groove plate 46 moving up, the wavy groove of the groove plate 46 slides upward along the sliding shaft 47, so that the sliding shaft 47 moves the groove plate 46 back and forth, and the groove plate 46 drives the grinding block 44 to move back and forth horizontally, thereby achieving the goal that the grinding block 44 can move back and forth horizontally with a small amplitude while moving up. The grinding block 44 moves upward and reciprocates horizontally at the same time to increase the contact area with the outer wall of the pier, so that the grinding block 44 can enhance the grinding effect by moving horizontally back and forth when it moves upward for grinding; through the setting of the dust cleaning component 4, the grinding block 44 can move upward to grind the contact surface between the pier and the strain gauge 6 before the strain gauge 6 contacts the pier, thereby removing dust and mud on the contact surface between the pier and the strain gauge 6, and avoiding the dust and mud from affecting the measurement accuracy of the strain gauge 6; through the cooperation of the groove plate 46 and the sliding shaft 47, the grinding block 44 can enhance the grinding effect by moving horizontally back and forth when it moves upward for grinding, thereby ensuring the cleanliness of the contact surface between the pier and the strain gauge 6.

[0028] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A strain monitoring device for bridge piers in steel-concrete composite beam construction, characterized in that: include: Two mounting frames (1), each mounting frame (1) having a strain gauge (5) mounted thereon, each strain gauge (5) being connected to a plurality of strain gauges (6) via wires; A climbing assembly (2) is used to drive two mounting frames (1) to climb on a bridge pier, the climbing assembly (2) comprising two motors (21) and two rotating shafts (22), the two rotating shafts (22) being rotatably mounted on the tops of the two mounting frames (1), the two motors (21) being connected to the two mounting frames (1), the output ends of the two motors (21) being transmission-connected to the two rotating shafts (22), the outer walls of the rotating shafts (22) being connected to a group of rollers (23), one of the mounting frames (1) being connected to two connecting springs (24), one end of the connecting spring (24) being away from the mounting frame (1) connected thereto being connected to a clamping block (25), and the other mounting frame (1) being connected to two clamping slots (26); The mounting frame (1) is provided with a pressing plate assembly (3) for pressing the strain gauge (6) onto the outer wall of the pier; The dust cleaning component (4) is used to clean the dust on the outer wall of the pier before the strain gauge (6) contacts the outer wall of the pier.

2. The device for monitoring strain of bridge piers during steel-concrete composite beam construction according to claim 1, characterized in that: The two clamping blocks (25) are respectively inserted into two clamping slots (26), and the clamping slots (26) are threadedly connected with adjustment threads (27).

3. The device for monitoring strain of bridge piers during steel-concrete composite beam construction according to claim 1, characterized in that: Two light rods (28) are slidably connected to one of the mounting frames (1), and the two light rods (28) are slidably connected to the top of the other mounting frame (1). Two guide wheels (29) are rotatably installed on the bottom of the mounting frame (1).

4. The strain monitoring device for bridge piers during steel-concrete composite beam construction according to claim 1 is characterized by: The tablet pressing assembly (3) comprises a cylinder (31), a square tube (32) and a mounting plate (33); the cylinder (31) is installed on the mounting frame (1); the square tube (32) is connected to the output end of the cylinder (31); and the mounting plate (33) is connected to the side of the square tube (32) away from the cylinder (31).

5. The device for monitoring strain of bridge piers during steel-concrete composite beam construction according to claim 4, characterized in that: The pressing plate assemblies (3) on the two mounting frames (1) are arranged in a mirror image, and the multiple strain gauges (6) of the two strain testers (5) are respectively connected to the two mounting plates (33).

6. The device for monitoring strain of bridge piers during steel-concrete composite beam construction according to claim 4, characterized in that: The tablet pressing assembly (3) further comprises two air bags (34), two abutting rods (35), two air pipes (36), a liquid tank (37) and a plurality of nozzles (38), wherein the two air bags (34) are respectively connected to the inner walls at both ends of the square tube (32), the two abutting rods (35) are respectively connected to the side of the two air bags (34) away from the cylinder (31), the liquid tank (37) is connected to the inside of the square tube (32), the two air pipes (36) are connected to both ends of the liquid tank (37), and the ends of the two air pipes (36) away from the liquid tank (37) are respectively connected to the two air bags (34), and the plurality of nozzles (38) are all connected to the liquid tank (37), and the plurality of nozzles (38) all penetrate the square tube (32) and the side of the mounting plate (33) away from the cylinder (31).

7. The device for monitoring strain of bridge piers during steel-concrete composite beam construction according to claim 4, characterized in that: The dust cleaning assembly (4) includes a fixed cover (41), a telescopic plate (42), a slide plate (43), a grinding block (44) and two connecting rods (45), wherein the fixed cover (41) is connected to the square tube (32) through a bracket, the telescopic plate (42) is slidably connected to the inner wall of the mounting frame (1), the slide plate (43) penetrates and is slidably connected to the telescopic plate (42), the grinding block (44) is slidably connected to the inner wall of the slide plate (43), one end of the two connecting rods (45) is hinged to the fixed cover (41), and the other end of the two connecting rods (45) is hinged to the top of the slide plate (43).

8. The device for monitoring strain of bridge piers during construction of a steel-concrete composite beam according to claim 7, characterized in that: The two dust cleaning assemblies (4) on the two mounting frames (1) are arranged in a mirror image, and a plurality of return springs are arranged inside the fixed cover (41), one end of each of the return springs is connected to the inner wall of the fixed cover (41), and the other end of each of the return springs is connected to one end of the telescopic plate (42) located inside the fixed cover (41).

9. The device for monitoring strain of bridge piers during construction of a steel-concrete composite beam according to claim 8, characterized in that: The dust cleaning assembly (4) further includes a groove plate (46) and a sliding shaft (47), wherein the groove plate (46) is connected to a side of the grinding block (44) close to the fixed cover (41), the bottom of the groove plate (46) passes through the slide plate (43), the telescopic plate (42) is provided with a square groove, the sliding shaft (47) is installed in the square groove of the telescopic plate (42), the groove plate (46) is provided with a wavy sliding groove, and the sliding shaft (47) is slidably connected to the wavy sliding groove of the groove plate (46).

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