Beam body vertical displacement monitoring system and monitoring method for replacing support of combined box girder bridge

Abstract

The invention relates to a beam body vertical displacement monitoring system and monitoring method for replacing a support of a combined box girder bridge, and belongs to the technical field of bridge displacement monitoring. Comprising a wireless high-precision laser displacement sensor used for monitoring vertical displacement of a beam body, a sensor clamp provided with the wireless high-precision laser displacement sensor is arranged on the pier top of the combined box beam or the side face of a transverse partition plate on the top of an abutment, and the projection direction of the wireless high-precision laser displacement sensor is made to be perpendicular to the horizontal plane; target spots are arranged on the pier top or the platform top of the combined box girder bridge, and the target spots are arranged under laser lenses of the wireless high-precision laser displacement sensors; and the wireless high-precision laser displacement sensor is connected with the sensor data collector through a data cable. According to the invention, the vertical displacement data of the beam body in the whole process of replacing the whole support from initial jacking to final beam falling of the beam bridge can be automatically measured, errors caused by dismounting and mounting of equipment and manual reading can be eliminated, and the vertical displacement change condition of the structure can be dynamically and truly reflected.

Description

Technical Field

[0001] The invention relates to a beam body vertical displacement monitoring system and a monitoring method for replacing combined box girder bridge supports, belonging to the technical field of bridge displacement monitoring. Background Art

[0002] Vertical displacement monitoring is an important monitoring indicator in the process of replacing the bearings of the composite box girder bridge. Usually, the monitoring means are dial indicators, pull-rope displacement sensors, laser displacement sensors (small range) or steel rulers and rigid angle rulers with a resolution of 1mm / 0.5mm. Although these types of monitoring means use different equipment, their principles are all to measure the relative displacement between the bottom of the composite box girder and the pier (platform) (reference object), and the measuring points are all set at the bottom of the beam. However, considering that the above equipment may be hit by workers or tools during the construction process, affecting the accuracy of the monitoring data, vertical displacement monitoring is usually only performed during the jacking stage and the beam dropping stage, while the monitoring equipment is usually removed during the load-holding construction stage, and the vertical displacement of the beam body is not monitored. Due to the certain errors in the removal and installation of the equipment itself, and the small allowable error of the displacement monitoring indicator, the existing conventional beam body vertical displacement monitoring method is difficult to accurately reflect the construction quality, and in the event of sudden safety accidents, such as during non-construction periods, when the jacking equipment is damaged or the structure is abnormal, it cannot be fed back to the project-related personnel in a timely manner for emergency disposal, which may cause large economic losses or personal injuries. Summary of the invention

[0003] In view of the above problems, the present invention provides a beam vertical displacement monitoring system and a monitoring method for replacing composite box girder bridge supports.

[0004] The present invention adopts the following technical solution:

[0005] A beam vertical displacement monitoring system for replacement of composite box girder bridge bearings, including a wireless high-precision laser displacement sensor for monitoring displacement, a sensor fixture for fixing the wireless high-precision laser displacement sensor, a solar cell, a sensor data collector, and a data cable;

[0006] The sensor fixture is arranged on the top of the combined box girder pier or the side of the platform top diaphragm. The sensor fixture is self-adjusted in orientation during arrangement so that the projection direction of the wireless high-precision laser displacement sensor is perpendicular to the horizontal plane.

[0007] The target point is arranged on the top of the composite box girder pier or the top of the platform, and the target point is arranged directly below the laser lens of the wireless high-precision laser displacement sensor;

[0008] The wireless high-precision laser displacement sensor is connected to the sensor data collector via a data cable;

[0009] The solar cell provides power for the wireless high-precision laser displacement sensor and the sensor data collector.

[0010] The beam vertical displacement monitoring system for replacing the combined box girder bridge bearings of the present invention also includes a server;

[0011] The sensor data collector has GPS / BDS positioning function and GPS / BDS timing function; the sensor data collector collects the vertical displacement data of the combined box girder bridge body and uploads it to the server through the 5G network for storage and retention.

[0012] The beam body vertical displacement monitoring system for replacing the combined box girder bridge bearings described in the present invention also includes a mobile phone and a computer; the mobile phone and the computer are respectively connected to a server, and the server feeds back the beam body vertical displacement data and its changes during the construction process, and receives early warning information at the same time.

[0013] The beam vertical displacement monitoring system for replacing the combined box girder bridge support of the present invention, the sensor fixture comprises a PVC transparent protective plate, a fixture base, a rotating screw, an anti-skid rubber pad, an anti-skid plate and a bubble level;

[0014] The clamp base is a box structure, and the opening of the clamp base is covered with a PVC transparent protective plate; the clamp base is provided with a parallel arranged anti-skid rubber pad and an anti-skid plate; the anti-skid rubber pad is pushed by a rotating screw located on one side of the clamp base;

[0015] A bubble level is provided on the top surface of the fixture base;

[0016] The wireless high-precision laser displacement sensor is installed and fixed between the anti-skid rubber pad and the anti-skid plate; the laser lens on the wireless high-precision laser displacement sensor is perpendicular to the horizontal plane.

[0017] The beam vertical displacement monitoring system for replacing the combined box girder bridge support of the present invention also includes a baffle fixing pointer, a screw locking device, and a screw handle; a screw handle is provided at one end of the rotating screw, and the screw locking device is arranged on the rotating screw;

[0018] A baffle fixing pointer is arranged on the surface of the opening end of the clamp base.

[0019] The beam vertical displacement monitoring system for replacing combined box girder bridge supports of the present invention comprises the target point arranged in a target point base, a box cover is provided on the target point base; the box cover is located on the target point and is provided with a light-transmitting hole.

[0020] The present invention provides a monitoring method for a beam vertical displacement monitoring system for replacing a composite box girder bridge support, and the method is as follows:

[0021] Step 1: Place the wireless high-precision laser displacement sensor into the sensor fixture and fix it; place the target into the target base and fix it;

[0022] Step 2: Install the wireless high-precision laser displacement sensor and the target point to the monitoring position of the diaphragm and the top of the pier or the top of the platform, and ensure that the laser projection direction of the lens of the wireless high-precision laser displacement sensor is aimed at the target point;

[0023] Step 3: Connect the solar cell to the wireless high-precision laser displacement sensor; connect the wireless high-precision laser displacement sensor to the sensor data collector via a data cable;

[0024] Step 4: Connect the sensor data collector to the server through the 5G network to receive relevant data collected on site;

[0025] Step 5: Set the distance between the wireless high-precision laser displacement sensor and the target point to the initial value h before the jacking construction. 初 , the actual distance between the two during construction is set to the measured value h 实 , then (h 实 -h 初 ) is the vertical displacement of the beam during the construction process. If the data exceeds the set safety threshold, an early warning message will be sent.

[0026] The monitoring method of the beam vertical displacement monitoring system for replacing the combined box girder bridge supports described in the present invention comprises the following steps: in step 2, the wireless high-precision laser displacement sensor is turned on to project its laser, the box cover on the target base is opened to expose the target, the position of the protective cover base is adjusted according to the laser projection position, the aluminum alloy box cover of the protective cover is closed to allow the laser to pass through the light-transmitting hole and irradiate the center of the target, and then the target base is fixed.

[0027] The monitoring method of the beam vertical displacement monitoring system for replacing the combined box girder bridge bearings described in the present invention is that the server stores the data transmitted by the wireless high-precision laser displacement sensor and generates data access information, and queries the vertical displacement data of the beam structure at each time period and each position and its changes during the construction process through a mobile phone and / or computer, and receives early warning information at the same time.

[0028] Beneficial Effects

[0029] The beam body vertical displacement monitoring system for composite box girder bridge bearing replacement provided by the present invention can automatically measure the beam body vertical displacement data of the beam body in real time during the entire bearing replacement process from the initial jacking to the final beam dropping, thereby eliminating the errors caused by equipment dismantling and installation and manual readings, and can dynamically and truly reflect the changes in the vertical displacement of the structure.

[0030] The beam vertical displacement monitoring system for the replacement of the combined box girder bridge support provided by the present invention can avoid the need for leveling with a level ruler by means of a bubble level, and a protective plate is added to protect the wireless high-precision laser displacement sensor from external damage or construction damage. At the same time, the target point is upgraded and modified, and a protective cover is added to also prevent it from external damage or construction damage.

[0031] The method for monitoring the vertical displacement of the beam body for the replacement of the combined box girder bridge support provided by the present invention can realize dynamic monitoring of the structural safety during the whole process of the support replacement according to the set control threshold, and provide an analysis and early warning mechanism. The system platform will actively send early warning information to the mobile phone APP terminal and the computer Web terminal, so that relevant personnel can timely discover possible safety problems in the beam body structure or jacking system. The system can effectively improve the monitoring efficiency and monitoring accuracy, and also has the characteristics of real-time early warning and immediate response. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the vertical displacement monitoring system of the present invention;

[0033] Figure 2 It is a schematic diagram of the structure of the sensor fixture of the present invention;

[0034] Figure 3 It is a schematic diagram of the internal structure of the sensor fixture of the present invention;

[0035] Figure 4 It is a schematic diagram of the side structure of the sensor fixture of the present invention;

[0036] Figure 5 It is a schematic diagram of the target and base structure of the present invention;

[0037] Figure 6 It is a schematic diagram of the top view of the target and base structure of the present invention;

[0038] Figure 7 It is a schematic diagram of the side view structure of the target and base of the present invention. DETAILED DESCRIPTION

[0039] In order to make the purpose and technical solution of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] like Figure 1As shown: a beam vertical displacement monitoring system for replacing a combined box girder bridge support, comprising a wireless high-precision laser displacement sensor 1 for monitoring displacement, a sensor fixture 3 for fixing the wireless high-precision laser displacement sensor 2, a solar cell 4, a sensor data collector 5, and a data cable 6;

[0041] The sensor fixture 2 is arranged on the top of the composite box girder pier or the side of the top diaphragm of the platform. The sensor fixture 2 is self-adjusted in orientation during arrangement so that the projection direction of the wireless high-precision laser displacement sensor 1 is perpendicular to the horizontal plane.

[0042] A target point 7 is arranged on the top surface of the composite box girder pier or the platform, and the target point 7 is arranged directly below the laser lens of the wireless high-precision laser displacement sensor 1; the wireless high-precision laser displacement sensor 1 is connected to the sensor data collector 4 through a data cable 6; and the solar cell 3 supplies power to the wireless high-precision laser displacement sensor 1 and the sensor data collector 4.

[0043] The sensor data collector 4 has GPS / BDS positioning function and GPS / BDS timing function; the sensor data collector 4 collects the vertical displacement data of the combined box girder bridge body and uploads it to the server 8 through the 5G network for storage and retention, and waits for subsequent analysis. The mobile phone 9 and the computer 10 are respectively connected to the server 8, and the server 8 feeds back the vertical displacement data of the beam body and its changes during the construction process, and receives early warning information at the same time.

[0044] like Figure 2 , Figure 3 , Figure 4 As shown: the sensor fixture 2 includes a PVC transparent protective plate 11, a fixture base 12, a rotating screw 16, an anti-skid rubber pad 17, an anti-skid plate 18 and a bubble level 19;

[0045] The clamp base 12 is a box structure, and the opening of the clamp base 12 is covered with a PVC transparent protective plate 11; the clamp base 12 is provided with a parallel arranged anti-skid rubber pad 17 and an anti-skid plate 18; the anti-skid rubber pad 17 is pushed by a rotating screw 16 located on one side of the clamp base 12;

[0046] A bubble level 19 is provided at the open end of the fixture base 12;

[0047] The wireless high-precision laser displacement sensor 1 is installed and fixed between the anti-skid rubber pad 17 and the anti-skid plate 18; the laser lens on the wireless high-precision laser displacement sensor 1 is perpendicular to the horizontal plane. A screw handle 15 is provided at one end of the rotating screw 16, and a screw locking device 14 is arranged on the rotating screw 16; a baffle fixing pointer 13 is provided on the PVC transparent protective plate 11.

[0048] like Figure 5 , Figure 6 , Figure 7 As shown: the target 7 is arranged in the target base 23, and a box cover 20 is provided on the target base 23; the box cover 20 is located on the target 7 and is provided with a light-transmitting hole 21.

[0049] The monitoring method is as follows:

[0050] Select a suitable position on the diaphragm, use structural adhesive to stick the sensor fixture 2 on the side of the diaphragm between the two combined box beams on the pier top, and adjust the position of the sensor fixture 2 according to the bubble level 19 on the sensor fixture 2 so that it is perpendicular to the vertical direction. Open the PVC transparent protective plate 11, put the wireless high-precision laser displacement sensor 1 into the fixture, and make the wireless high-precision laser displacement sensor 1 close to the surface of the base, turn the screw handle 15, adjust the screw 16 to make the two sides of the wireless high-precision laser displacement sensor 1 fit tightly with the anti-slip plate 18 and the anti-slip rubber pad 17, and make the laser projection direction of the lens of the wireless high-precision laser displacement sensor 1 perpendicular to the horizontal plane.

[0051] After confirmation, the screw locking device 14 is opened to fix the wireless high-precision laser displacement sensor 1 in the sensor fixture 2 .

[0052] Turn on the wireless high-precision laser displacement sensor 1 switch, install the target and protective cover at the laser projection position on the top surface of the pier (platform), open the aluminum alloy box cover 20 of the protective cover to expose the target 7, adjust the position of the protective cover base 23 according to the laser projection position, and close the aluminum alloy box cover 20 of the protective cover so that the laser passes through the light-transmitting hole 21 and irradiates the center of the target 22, and then glue the protective cover base 23 to this position and ensure that it does not move. The vertical displacement h of the beam body is the distance from the center of the lens of the wireless high-precision laser displacement sensor 1 fixed in the diaphragm sensor fixture 2 to the surface of the target 7. After setting a suitable sampling frequency for the wireless high-precision laser displacement sensor 1, the vertical displacement h of the beam body measured each time is transmitted to the sensor data collector 4 through the wireless wife signal.

[0053] The vertical displacement data of the beam body collected on-site is uploaded to the hard disk database in the server 8 through the 5G network for storage, and compared with the pre-set safety threshold of the vertical displacement of the beam body. The comparison result is pushed to the front-end platform. If the vertical displacement data of the beam body does not exceed the safety threshold, no warning information is sent to the front-end platform, i.e., the mobile phone 9 and the computer 10; if it exceeds the safety threshold, a warning information is sent to the front-end platform, i.e., the mobile phone 9 and the computer 10.

[0054] Users can query the vertical displacement data of the beam structure at various time periods and locations and its changes during the construction process through mobile phones 9APP and computers 10Web, and receive early warning information at the same time, so that users can promptly discover possible safety problems in the composite box girder structure or jacking system.

[0055] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A beam vertical displacement monitoring system for the replacement of composite box girder bridge bearings, characterized by: It comprises a wireless high-precision laser displacement sensor (1) for monitoring the vertical displacement of a beam body, a sensor fixture (2) for fixing the wireless high-precision laser displacement sensor (1), a solar cell (3), a sensor data collector (4), and a data cable (6); The sensor fixture (2) is arranged on the top of the combined box girder pier or the side of the top diaphragm of the platform. The sensor fixture (2) is self-adjusted in orientation during arrangement so that the projection direction of the wireless high-precision laser displacement sensor (1) is perpendicular to the horizontal plane. A target point (7) is arranged on the pier top or the platform top of the composite box girder bridge, and the target point (7) is arranged directly below the laser lens of the wireless high-precision laser displacement sensor (1); The wireless high-precision laser displacement sensor (1) is connected to the sensor data collector (4) via a data cable (6); The solar cell (3) supplies power to the wireless high-precision laser displacement sensor (1) and the sensor data collector (4).

2. The beam vertical displacement monitoring system for composite box girder bridge bearing replacement according to claim 1 is characterized in that: Also includes a server (8); The sensor data collector (4) has GPS / BDS positioning function and GPS / BDS timing function; the sensor data collector (4) collects the vertical displacement data of the combined box girder bridge body and uploads it to the server (8) through the 5G network for storage and retention.

3. The beam vertical displacement monitoring system for composite box girder bridge bearing replacement according to claim 2 is characterized in that: It also includes a mobile phone (9) and a computer (10); the mobile phone (9) and the computer (10) are respectively connected to a server (8), and the server (8) feeds back vertical displacement data of the beam body and its changes during the construction process, and receives early warning information at the same time.

4. The beam vertical displacement monitoring system for composite box girder bridge bearing replacement according to claim 1 is characterized in that: The sensor fixture (2) comprises a PVC transparent protective plate (11), a fixture base (12), a rotating screw (16), an anti-skid rubber pad (17), an anti-skid plate (18) and a bubble level (19); The clamp base (12) is a box structure, and the opening of the clamp base (12) is covered with a PVC transparent protective plate (11); the clamp base (12) is provided with a parallel arranged anti-skid rubber pad (17) and an anti-skid plate (18); the anti-skid rubber pad (17) is pushed by a rotating screw (16) located on one side of the clamp base (12); A bubble level (19) is provided at the open end of the fixture base (12); The wireless high-precision laser displacement sensor (1) is installed and fixed between the anti-skid rubber pad (17) and the anti-skid plate (18); the laser lens on the wireless high-precision laser displacement sensor (1) is perpendicular to the horizontal plane.

5. The beam vertical displacement monitoring system for composite box girder bridge bearing replacement according to claim 4 is characterized in that: It also includes a baffle fixing pointer (13), a screw locking device (14), and a screw handle (15); one end of the rotating screw (16) is provided with a screw handle (15), and the screw locking device (14) is arranged on the rotating screw (16); A baffle fixing pointer (13) is provided on the PVC transparent protection plate (11).

6. The beam vertical displacement monitoring system for composite box girder bridge bearing replacement according to claim 1 is characterized in that: The target point (7) is arranged in a target point base (23), and a box cover (20) is provided on the target point base (23); the box cover (20) is located on the target point (7) and is provided with a light-transmitting hole (21).

7. A monitoring method using the beam vertical displacement monitoring system for combined box girder bridge bearing replacement according to any one of claims 1 to 6, characterized in that: Here’s how: Step 1: Place the wireless high-precision laser displacement sensor (1) into the sensor fixture (2) and fix it; place the target (7) into the target base (23) and fix it; Step 2: Install the wireless high-precision laser displacement sensor (1) and the target point (7) at the monitoring position of the diaphragm and the pier top or the platform top, and ensure that the laser projection direction of the lens of the wireless high-precision laser displacement sensor (1) is aligned with the target point (7); Step 3: Connect the solar cell (3) to the wireless high-precision laser displacement sensor (1); connect the wireless high-precision laser displacement sensor (1) to the sensor data collector (4) via a data cable (6); Step 4: Connect the sensor data collector (4) to the server (8) via the 5G network to receive relevant data collected on site; Step 5: Set the distance between the wireless high-precision laser displacement sensor (1) and the target point (7) to an initial value h before the lifting construction. 初 , During construction, the actual spacing is set to the measured value h 实 , then (h 实 -h 初 ) is the vertical displacement of the beam during construction. If the data exceeds the set safety threshold, an early warning message will be sent.

8. The monitoring method of the beam vertical displacement monitoring system for the combined box girder bridge bearing replacement according to claim 7 is characterized in that: In step 2, the wireless high-precision laser displacement sensor (1) is turned on to project its laser, the box cover (20) on the target base (23) is opened to expose the target (7), the position of the protective cover base (23) is adjusted according to the laser projection position, the aluminum alloy box cover (20) of the protective cover is closed to allow the laser to pass through the light-transmitting hole (21) and irradiate the center of the target (7), and then the target base (23) is fixed.

9. The monitoring method of the beam vertical displacement monitoring system for composite box girder bridge bearing replacement according to claim 7 is characterized in that: The server (8) stores the data transmitted by the wireless high-precision laser displacement sensor (1) and generates data access information, and queries the vertical displacement data of the beam structure at various time periods and locations and its changes during the construction process through a mobile phone (9) and / or a computer (10), and receives early warning information at the same time.

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