Monitoring device for cast-in-cantilever beam bridge closure gap

Abstract

A monitoring device for a cast-in-cantilever beam bridge closure opening comprises an electrical cabinet, a first side detection frame and a second side detection frame, the first side detection frame and the second side detection frame each comprise a base plate, the base plates are fixed to the corresponding closure opening bridge floor, and adjusting support plates are installed on the base plates; a first side force bearing plate and a second side force bearing plate are correspondingly arranged on the adjusting support plates of the first side detection frame and the second side detection frame, and a first side assembly type horizontal rod and a second side assembly type horizontal rod are correspondingly installed on the first side force bearing plate and the second side force bearing plate in an oppositely extending mode. The first side detection frame is provided with a laser distance measuring sensor used for measuring longitudinal, transverse and vertical distances, the second side detection frame is correspondingly provided with a light reflecting plate, the laser distance measuring sensor is connected with an electrical cabinet, and the electrical cabinet is further connected with an environmental data acquisition instrument. The monitoring device is convenient to install and apply, and temperature, wind speed and longitudinal, transverse and vertical deformation displacement monitoring can be carried out on the closure gap all day and all time.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a monitoring device for the closure of a cantilever cast beam bridge. Background Art

[0002] Closure is one of the most important processes in the construction of cantilever continuous beam bridges. The construction quality of the closure section is an important factor affecting the quality of the entire beam. The length of the cantilever beam section will stretch to a certain extent when the temperature rises, and shorten when the temperature drops. In order to prevent the concrete in the closure section from being tensilely cracked due to the shortening of the completed cantilever segment beam body, the general design requires that the closure be low-temperature closure, that is, the closure mouth is locked to complete the concrete pouring when the temperature is the lowest and the closure mouth spacing is the largest, which can effectively avoid the problem of tensile cracking of the concrete in the closure section.

[0003] Before low-temperature closure, it is required to accurately grasp the changes in temperature and the distance between the closures and the relationship between the two, and determine the best closure time after statistical analysis of the data. This requires accurate observation of changes in temperature and the distance between the closures about a week before the closure, and forming data records, and recording these data needs to be done 24 hours a day. In traditional bridge closure construction, practitioners often use steel rulers and total stations to measure the displacement of the closure points. However, the measurement error of the measuring points with steel rulers is large, and due to the large number of measuring points at the closure, the workload is large, time-consuming and labor-intensive. The use of total stations for measurement has high requirements for the on-site environment. The total station needs to be adjusted to a position where the line of sight is not blocked and the distance is suitable for measurement. In addition, the manually erected total station cannot be accurately located, resulting in inaccurate measured data and difficulty in continuous monitoring. Therefore, people have adopted new observation technologies for bridge joints, for example, Chinese patent: An observation device for bridge joints and its use method, application number: 202211291524.1, application date: 2022.10.19, abstract: The present invention discloses an observation device for bridge joints and its use method, which relates to the field of bridge construction technology, and includes: at least one support assembly and at least one detection device; wherein, at least one support assembly is used to be detachably assembled on the first side of the bridge joint, and the support assembly is provided with a control unit; at least one detection device is assembled on the support assembly, and the detection device includes at least two dial indicators, and the two dial indicators are respectively used to monitor the displacement change information of the second side of the bridge joint, and transmit the displacement change information to the control unit. The observation device in the present invention continuously detects and collects the change values ​​of the longitudinal and lateral displacements at the bridge joint by setting a detachable dial indicator, so that the measurement data is more accurate and easier to adjust.

[0004] Applied research has found that the above-mentioned observation device is difficult to install and use. In severe weather such as heavy rain and wind, the detection equipment is easy to move, which will interfere with on-site observations and affect the accuracy of the observation data. It is also not convenient to continuously detect and collect the change value of the vertical displacement. Summary of the invention

[0005] The purpose of the utility model is to provide a monitoring device for the closure of a cantilever cast beam bridge. The monitoring device for the closure of a cantilever cast beam bridge is easy to install and use, can ignore the influence of weather, can monitor all day and all time, and can simultaneously measure the longitudinal, transverse and vertical directions.

[0006] The utility model is realized by adopting the following technical solutions:

[0007] A monitoring device for a closure of a cantilever cast beam bridge comprises an electrical cabinet, a first side detection frame and a second side detection frame, the first side detection frame and the second side detection frame are respectively installed and fixed on the first side and the second side of the closure, the first side detection frame and the second side detection frame are used in pairs, the first side detection frame and the second side detection frame respectively comprise a base plate, the base plate is fixedly connected to the bridge deck of the closure on the corresponding side by base plate fixing bolts, the base plate is a square plate, fixed to the bridge deck at both ends of the closure by base plate fixing bolts, the base plate fixing bolts can be pre-buried or later driven expansion bolts; an adjusting support plate is installed on the base plate, a first side bearing plate is arranged on the adjusting support plate of the first side detection frame, a second side bearing plate is arranged on the adjusting support plate of the second side detection frame, corresponding first side assembled horizontal bars and second side assembled horizontal bars are relatively extended and installed on the first side bearing plates and the first side assembled horizontal bars are relatively extended and installed on the second side bearing plates The rod and the second side assembled horizontal rod are arranged one high and one low. Three laser ranging sensors for measuring the longitudinal, transverse and vertical spacing are installed on the first side bearing plate and the first side assembled horizontal rod respectively. Reflective plates for cooperating with the laser ranging sensors for measurement are arranged on the second side bearing plate and the second side assembled horizontal rod respectively. The laser ranging sensor is connected to the electrical cabinet, and the electrical cabinet is also connected to an environmental data collector. Environmental data collection equipment, data transmission equipment and on-site early warning equipment are centrally installed on the electrical cabinet; the environmental data collection equipment includes a temperature collector and an anemometer, wherein the anemometer is installed on the top of a telescopic round rod, and the lower part of the round rod is fastened to a special electrical cabinet; the data transmission equipment adopts an integrated Internet of Things controller, which has the functions of edge computing, graphic programming PLC, 4 / 5G router, open source gateway, expandable IO and protocol converter; the on-site early warning equipment is a 4G speaker. The installation of the above-mentioned electrical cabinet and related equipment enables the simultaneous monitoring of temperature, wind speed and three-dimensional deformation and displacement data of each single closure on site, and preliminary high-frequency analysis and feedback warning; the data is further uploaded to the database to provide a data source for remote, fully automatic and accurate monitoring of closure data, joint solution and analysis, and prediction of closure time periods, thereby avoiding high-risk manual measurement operations at night.

[0008] Further preferred: the first side bearing plate and the second side bearing plate are both composed of two corresponding vertical plates, the two vertical plates are vertically connected to the adjustment support plate, and a slide rail seat is connected between the two vertical plates; a slide rail is installed on the slide rail seat, a slider is slidably installed on the slide rail, and a screw for locking the slider to the slide rail is provided on the slider; the slide rail seat connects the two vertical plates into one, and facilitates the sliding installation of the laser ranging sensor and the corresponding reflector through the slider and the slide rail.

[0009] Further preferably, the first side bearing plate and the second side bearing plate are detachably connected to the corresponding first side assembled horizontal rod and the second side assembled horizontal rod by using mounting bolts.

[0010] Further preferably, a level bubble is installed on each of the first side assembled horizontal rod and the second side assembled horizontal rod.

[0011] Further preferred: the first side assembled horizontal rod and the second side assembled horizontal rod both include an assembled connection assembly and multiple rod bodies, and two adjacent rod bodies are connected by the assembled connection assembly. The assembled connection assembly includes a connection plate and a connection bolt. The connection plate and the rod body are provided with connection holes. The connection plates are placed on both sides of the rod body, and then the bolts are passed through the connection holes and the nuts are tightened to connect the two adjacent rod bodies. The first side assembled horizontal rod and the second side assembled horizontal rod are connected with standard rod bodies according to the width of the joint to adjust the total length of the horizontal rod; the first section of the standard rod body is fastened to the load-bearing plate with bolts, and it is ensured to be parallel to the plane of the adjustment support plate and the axial axis to ensure the accuracy of the distance measurement of the laser sensor installed on the horizontal rod later.

[0012] Further preferred: the front end of the first side assembled horizontal bar is provided with a lateral extension frame, on which a laser distance measuring sensor for measuring lateral displacement is installed, and the front end of the second side assembled horizontal bar is provided with a corresponding reflector for cooperating with the laser distance measuring sensor for measuring lateral displacement. The front end bottom of the first side assembled horizontal bar is provided with a laser distance measuring sensor for measuring vertical displacement, and the front end top of the second side assembled horizontal bar is provided with a corresponding reflector for cooperating with the laser distance measuring sensor for measuring vertical displacement; the first side bearing plate is provided with a laser distance measuring sensor for measuring longitudinal displacement, and the laser distance measuring sensor is slidably installed through a slider and a slide rail and a slide rail seat between the two vertical plates of the first side bearing plate, and a reflector for cooperating with the laser distance measuring sensor for measuring longitudinal displacement is provided on the second side bearing plate, and the reflector is slidably installed through a slider and a slide rail and a slide rail seat between the two vertical plates of the second side bearing plate, so as to realize longitudinal fine adjustment for measuring the width of the joint. The laser distance measuring sensor and the reflector are provided with a rain shield to prevent rain from wetting the surface and affecting data collection.

[0013] Further preferred: the middle position of the adjustment support plate is supported and connected to the base plate through a single-rod ball joint bearing, and the adjustment support plates on both sides of the single-rod ball joint bearing are provided with arc-shaped waisted circular holes, and the adjustment support plate adjustment fastening bolts used to adjust the adjustment support plate to a limited position are passed through the arc-shaped waisted circular holes, and the adjustment support plate adjustment fastening bolts are connected to the base plate. The single-rod ball joint bearing is a single-rod TBS ball joint bearing, which has screw threads at both ends, and the base plate and the adjustment support plate are connected by screw holes in the middle of the base plate and the adjustment support plate, and the two can be universally rotated relative to each other; four arc-shaped waisted circular holes are symmetrically opened at a certain distance inward at the four corners of the adjustment support plate with the midpoint of the plate as the center of the circle; the adjustment support plate adjustment fastening bolts are welded to the corresponding positions of the diagonal of the base plate, so that the base plate and the adjustment support plate can be fastened and the horizontal and axial directions of the support can be adjusted.

[0014] Further preferably, the adjustment support plate is provided with a level bubble; there are two level bubbles, which are arranged on both sides of the top surface of the adjustment support plate respectively, for assisting in leveling the adjustment support plate.

[0015] Technical effects and advantages of the utility model:

[0016] The monitoring device of the closure of this cantilever cast-beam bridge is arranged on the bridge deck adjacent to the closure section, and will not interfere with the construction work of the closure section; the device is connected to the bridge body with bolts and is firmly installed; the device structure has a universal adjustment support, which is easy and accurate to adjust; it is equipped with an assembled horizontal rod, and the length of the horizontal rod can be freely adjusted according to the different widths of the closure; it completely replaces manual work to automatically and accurately monitor the data of the closure at multiple measurement points at high frequency around the clock, avoiding dangerous manual measurement work at night; it can automatically and continuously monitor the deformation value of the closure on site, analyze it at high frequency and quickly warn of over-limit situations, to ensure efficient monitoring of the closure and over-limit correction prompts; it can remotely and continuously record and analyze multi-factor coupled deformation displacement curves, and predict the closure period with multiple factors; in multiple closures, it can realize unmanned automatic monitoring and intelligent joint solution, provide comprehensive and highly accurate data support for closure construction, and improve the quality of closure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the installation relationship of the monitoring device at the closure of the cantilever cast beam bridge;

[0018] Figure 2 This is a schematic diagram of the structure of the monitoring device for the closure of the cantilever cast beam bridge;

[0019] Figure 3 It is a schematic diagram of the installation relationship between the base plate and the adjustment support plate;

[0020] The parts names and numbers in the figure are:

[0021] 1. Electrical cabinet; 2. Environmental data collector; 3. First side of joint; 4. Detection frame on first side; 5. Detection frame on second side; 6. Second side of joint; 7. Base plate; 8. Base plate fixing bolts; 9. Adjustment of support plate and adjustment of fastening bolts; 10. Adjustment of support plate; 11. Second side load-bearing plate; 12. Mounting bolts; 13. Level bubble; 14. Second side assembled horizontal bar; 15. Reflector; 16. Assembled connection assembly; 17. Lateral extension frame; 18. Laser ranging sensor; 19. First side assembled horizontal bar; 20. First side load-bearing plate; 21. Slide rail seat; 22. Arc-shaped waist hole; 23. Single-rod ball joint bearing; 24. Slide rail; 25. Slider. DETAILED DESCRIPTION

[0022] In order to describe the present technology more clearly, the present technology is further described in detail below with reference to the accompanying drawings and embodiments. Example

[0023] A monitoring device for a closure of a cantilever cast beam bridge comprises an electrical cabinet 1, a first side detection frame 4 and a second side detection frame 5. The first side detection frame 4 and the second side detection frame 5 are respectively mounted and fixed on a first side 3 and a second side 6 of the closure. The first side detection frame 4 and the second side detection frame 5 are used in pairs. The first side detection frame 4 and the second side detection frame 5 each comprise a base plate 7. The base plate 7 is fixedly connected to the closure bridge deck on the corresponding side by base plate fixing bolts 8. The base plate is a square plate. The base plate fixing bolts 8 are fixed to the bridge deck at both ends of the joint. The base plate fixing bolts 8 can be pre-buried or later driven expansion bolts; an adjustment support plate 10 is installed on the base plate 7, a first side bearing plate 20 is arranged on the adjustment support plate 10 of the first side detection frame 4, and a second side bearing plate 11 is arranged on the adjustment support plate 10 of the second side detection frame 5. The first side bearing plate 20 and the second side bearing plate 11 are relatively extended and installed with corresponding first side assembled horizontal rods 19 and second side assembled horizontal rods 14 The first side assembled horizontal bar 19 and the second side assembled horizontal bar 14 are arranged in a high and low arrangement. Three laser distance measuring sensors 18 for measuring the longitudinal, transverse and vertical spacings are installed on the first side bearing plate 20 and the first side assembled horizontal bar 19 respectively. The second side bearing plate 11 and the second side assembled horizontal bar 14 are correspondingly provided with a reflector 15 for cooperating with the laser distance measuring sensor 18 for measurement. The laser distance measuring sensor 18 is connected to the electrical cabinet 1, and the electrical cabinet 1 is also connected to the environmental data collector 2. The electrical cabinet 1 is centrally installed with environmental data collection equipment, data transmission equipment and on-site early warning equipment. The data transmission equipment adopts an integrated Internet of Things controller, which has the functions of edge computing, graphic programming PLC, 4 / 5G router, open source gateway, expandable IO and protocol converter; the on-site early warning equipment is a 4G speaker, and the environmental data collector 2 includes a temperature collector and an anemometer, wherein the anemometer is installed on the top of a telescopic round rod, and the lower part of the round rod is fastened to a special electrical cabinet. The installation of the above-mentioned electrical cabinet and related equipment realizes the synchronous monitoring of the on-site temperature, wind speed and three-dimensional deformation displacement data of each closure section and uploads them to the database. The analysis platform obtains data from the cloud database and automatically analyzes it. After the analysis is completed, the data is transmitted to the application terminal to draw the deformation curve of the wind force and temperature of the closure in the corresponding period, and automatically determine the best closure period.

[0024] The first side bearing plate 20 and the second side bearing plate 11 are both composed of two corresponding vertical plates, the two vertical plates are vertically connected to the adjustment support plate 10, and a slide rail seat 21 is connected between the two vertical plates; a slide rail 24 is installed on the slide rail seat 21, and a slider 25 is slidably installed on the slide rail 24, and a screw for locking the slider 25 to the slide rail 24 is provided on the slider 25; a laser ranging sensor 18 and a reflector 15 for measuring longitudinal displacement are installed on the corresponding slider 25.

[0025] The first side bearing plate 20 and the second side bearing plate 11 are detachably connected to the corresponding first side assembled horizontal rod 19 and the second side assembled horizontal rod 14 by using mounting bolts 12 .

[0026] Level bubbles 13 are installed on the first side assembled horizontal rod 19 and the second side assembled horizontal rod 14 respectively.

[0027] The first side assembled horizontal rod 19 and the second side assembled horizontal rod 14 both include an assembled connection assembly 16 and multiple rod bodies. Two adjacent rod bodies are connected by the assembled connection assembly 16. The assembled connection assembly 16 includes a connection plate and a connection bolt. The connection plate and the rod body are provided with connection holes. The connection plates are placed on both sides of the rod body, and then the bolts are inserted through the connection holes and the nuts are tightened to connect the two adjacent rod bodies. The first side assembled horizontal rod 19 and the second side assembled horizontal rod 14 are connected to the standard rod body according to the width of the joint to adjust the length of the horizontal rod; the first section of the standard rod body is fastened to the load-bearing plate with bolts, and it is ensured to be parallel to the plane and axial axis of the adjustment support plate 10 to ensure the accuracy of the distance measurement of the laser distance measurement sensor installed on the horizontal rod later.

[0028] The front end of the first side assembled horizontal bar 19 is provided with a lateral extension frame 17, on which a laser distance sensor 18 for measuring lateral displacement is installed, and the front end of the second side assembled horizontal bar 14 is provided with a corresponding reflector 15 for cooperating with the laser distance sensor 18 to measure lateral displacement. The front end bottom of the first side assembled horizontal bar 19 is provided with a laser distance sensor 18 for measuring vertical displacement, and the front end top of the second side assembled horizontal bar 14 is provided with a corresponding reflector 15 for cooperating with the laser distance sensor 18 to measure vertical displacement; the first side bearing plate 20 is provided with a laser distance sensor 18 for measuring longitudinal displacement, and the second side bearing plate 11 is provided with a corresponding reflector 15 for cooperating with the laser distance sensor 18 to measure longitudinal displacement. The laser distance sensor 18 and the reflector 15 are provided with rain shields to prevent rain from wetting the surface and affecting data collection.

[0029] The middle position of the adjustment support plate 10 is supported and connected to the base plate 7 by a single-rod ball joint bearing 23. The adjustment support plate 10 on both sides of the single-rod ball joint bearing 23 is provided with arc-shaped waisted circular holes 22. The adjustment support plate adjustment fastening bolts 9 for adjusting the adjustment support plate 10 are inserted into the arc-shaped waisted circular holes 22, and the adjustment support plate adjustment fastening bolts 9 are connected to the base plate 7. The single-rod ball joint bearing 23 is a single-rod TBS ball joint bearing, and screw threads are opened at both ends. The base plate 7 and the adjustment support plate 10 are connected by opening screw threads in the middle of the base plate 7 and the adjustment support plate 10, and the two can be universally rotated relative to each other; four arc-shaped waisted circular holes 22 are opened symmetrically at a certain distance inward at the four corners of the adjustment support plate 10 with the midpoint of the plate as the center of the circle; the adjustment support plate adjustment fastening bolts 9 are welded to the corresponding positions of the diagonal of the base plate 7, so that the base plate 7 and the adjustment support plate 10 can be adjusted, calibrated and fastened.

[0030] The adjusting support plate 10 is provided with a level bubble 13 ; there are two level bubbles 13 , which are arranged on both sides of the top surface of the adjusting support plate 10 , respectively, for assisting in leveling the adjusting support plate 10 .

[0031] The above description is not a limitation of the present application, and the present application is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present application should fall within the scope of protection of the present application.

Claims

1. A monitoring device for the closure of a cantilever cast beam bridge, characterized in that: The invention comprises an electrical cabinet (1), a first side detection frame (4) and a second side detection frame (5), wherein the first side detection frame (4) and the second side detection frame (5) are respectively mounted and fixed on a first side (3) and a second side (6) of the joint opening, wherein the first side detection frame (4) and the second side detection frame (5) each comprise a base plate (7), wherein the base plate (7) is fixedly connected to the joint opening bridge deck on the corresponding side via base plate fixing bolts (8), wherein an adjustment support plate (10) is mounted on the base plate (7), wherein a first side bearing plate (20) is arranged on the adjustment support plate (10) of the first side detection frame (4), wherein a second side bearing plate (11) is arranged on the adjustment support plate (10) of the second side detection frame (5), wherein the first side bearing plate (20) and the second side bearing plate (11) are respectively mounted on the adjustment support plate (10) of the first side detection frame (4) and the second side bearing plate (11) are respectively mounted on the adjustment support plate (10) of the second side detection frame (5), wherein the first side bearing plate (20 ... first side detection frame (4) and the second side bearing plate (11) are respectively mounted on the adjustment support plate (10) of the second side detection frame (5), wherein the first side bearing plate (20) and the second side bearing plate (11) are respectively mounted on the adjustment support plate (10) of the first side detection frame (4) and the second side bearing plate (11) are A first side assembly type horizontal rod (19) and a second side assembly type horizontal rod (14) are mounted on the side bearing plate (11) so as to extend outward from each other. The first side assembly type horizontal rod (19) and the second side assembly type horizontal rod (14) are arranged one high and one low. Three laser distance measuring sensors (18) for measuring longitudinal, transverse and vertical spacing are mounted on the first side bearing plate (20) and the first side assembly type horizontal rod (19) respectively. A reflective plate (15) for cooperating with the laser distance measuring sensor (18) for measuring is arranged on the second side bearing plate (11) and the second side assembly type horizontal rod (14) respectively. The laser distance measuring sensor (18) is connected to the electrical cabinet (1). The electrical cabinet (1) is also connected to an environmental data acquisition device (2).

2. The monitoring device for the closure of a cantilever cast beam bridge according to claim 1, characterized in that: The first side bearing plate (20) and the second side bearing plate (11) are both composed of two corresponding vertical plates, the two vertical plates are vertically connected to the adjustment support plate (10), a slide rail seat (21) is connected between the two vertical plates, a slide rail (24) is installed on the slide rail seat (21), a slider (25) is slidably installed on the slide rail (24), and a screw for locking the slider (25) and the slide rail (24) is provided on the slider (25).

3. The monitoring device for the closure of a cantilever cast beam bridge according to claim 2, characterized in that: The first side bearing plate (20) and the second side bearing plate (11) are detachably connected to the corresponding first side assembled horizontal rod (19) and the second side assembled horizontal rod (14) by means of mounting bolts (12).

4. The monitoring device for the closure of a cantilever cast beam bridge according to claim 1, characterized in that: Level bubbles (13) are respectively installed on the first side assembled horizontal rod (19) and the second side assembled horizontal rod (14).

5. The monitoring device for the closure of a cantilever cast beam bridge according to claim 4, characterized in that: The first side assembled horizontal rod (19) and the second side assembled horizontal rod (14) both include an assembled connection assembly (16) and a plurality of rod bodies. Two adjacent rod bodies are connected via the assembled connection assembly (16). The assembled connection assembly (16) includes a connection plate and a connection bolt. The connection plate and the rod body are both provided with connection holes. The connection plates are placed on both sides of the rod body. Then, bolts are inserted through the connection holes and nuts are tightened to connect the two adjacent rod bodies.

6. The monitoring device for the closure of a cantilever cast beam bridge according to claim 1, characterized in that: The front end of the first side assembled horizontal rod (19) is provided with a lateral extension frame (17), and a laser distance sensor (18) for measuring lateral displacement is installed on the lateral extension frame (17). The front end of the second side assembled horizontal rod (14) is correspondingly provided with a reflective plate (15) for cooperating with the laser distance sensor (18) to measure lateral displacement.

7. The monitoring device for the closure of a cantilever cast beam bridge according to claim 1, characterized in that: The middle position of the adjustment support plate (10) is supported and connected to the base plate (7) via a single-rod ball joint bearing (23); arc-shaped waist-shaped holes (22) are provided on the adjustment support plate (10) on both sides of the single-rod ball joint bearing (23); adjustment support plate adjustment fastening bolts (9) for adjusting the limit position of the adjustment support plate (10) are passed through the arc-shaped waist-shaped holes (22); and the adjustment support plate adjustment fastening bolts (9) are connected to the base plate (7).

8. The monitoring device for the closure of a cantilever cast beam bridge according to claim 1, characterized in that: The adjustment support plate (10) is provided with a level bubble (13).

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