Temperature and stress coupling monitoring device for flying swallow type arch bridge construction

Abstract

The invention discloses a temperature and stress coupling monitoring device for flying swallow type arch bridge construction, and relates to the field of arch bridge construction monitoring. The temperature and stress coupling monitoring device for flying swallow type arch bridge construction comprises installation blocks, monitoring mechanisms fixedly connected to the surfaces of the two installation blocks and four bolts symmetrically installed on the surfaces of the installation blocks in a matched mode, first U-shaped plates are installed on the surfaces of the two bolts in a matched mode, and second U-shaped plates are installed on the surfaces of the two bolts in a matched mode. Second U-shaped plates are installed on the surfaces of the other two bolts in a matched mode. Through the arrangement of the first rolling wheel, the second rolling wheel and the first spring, when the adjusting column is adjusted to rotate by utilizing the elastic force effect of the first spring, the connecting line can be shrunk into the first sunscreen cover and the second sunscreen cover along the round holes, so that the connecting line arranged outside the sunscreen covers can be tightly attached to the bridge floor; therefore, the installation time of the multiple monitoring mechanisms is shortened, and the installation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of arch bridge construction monitoring, and in particular to a temperature and stress coupling monitoring device for flying swallow type arch bridge construction. Background Art

[0002] The temperature and stress coupling monitoring device for the construction of swallow-type arch bridges mainly consists of sensors, data acquisition and transmission systems, data analysis and processing systems, etc. During the construction phase, the main arch, side arches, tie rods and other components of the swallow-type arch bridge are affected by factors such as sunlight, day and night temperature differences, and concrete hydration heat. Temperature changes will significantly cause structural stress redistribution, and stress changes may react on the temperature field distribution due to changes in constraint conditions. The coupled monitoring device synchronously collects temperature and stress data and combines it with a special decoupling algorithm to accurately distinguish between "pure load stress", "pure temperature stress" and the additional stress generated by the coupling of the two, avoiding errors caused by single monitoring (such as measuring only stress) (for example, mistakenly mistaking temperature-induced strain for structural stress anomaly), thereby more accurately judging the actual stress state of the structure, promptly discovering risks such as overstress and abnormal deformation, and ensuring the stability of the structure during construction (such as stress control during the arch rib closure stage).

[0003] The temperature and stress coupling monitoring devices used in existing Feiyan-style arch bridge construction are usually fixed to the surface of the bridge pier or bridge body through bolts. Depending on the actual situation of the bridge, a monitoring device is set up at intervals, and each monitoring device is connected by a wire to ensure the accuracy of the monitoring data. According to actual usage, sunscreens of corresponding specifications are also installed to protect the monitoring devices. However, existing sunscreens do not have a wire retracting function, which affects installation efficiency.

[0004] Therefore, it is necessary to propose a temperature and stress coupling monitoring device for the construction of a flying swallow arch bridge to solve the above problems. Summary of the Invention

[0005] The main purpose of the present invention is to provide a temperature and stress coupling monitoring device for the construction of a flying swallow arch bridge, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is: A temperature and stress coupling monitoring device for the construction of a swallow-type arch bridge, comprising a mounting block, a monitoring mechanism fixedly connected to the surfaces of two mounting blocks, and bolts symmetrically mounted on the surfaces of the mounting blocks, wherein there are four bolts, two of which are mounted with a first U-shaped plate on their surfaces, and the other two are mounted with a second U-shaped plate on their surfaces, the first U-shaped plate and the second U-shaped plate being slidably connected, the upper surfaces of the two first U-shaped plates being fixedly connected with a first sunscreen, the upper surfaces of the two second U-shaped plates being fixedly connected with a second sunscreen, the first sunscreen being slidably connected with the second sunscreen, and the second sunscreen The surface of the L-shaped plate is provided with a circular hole, and the wall of the circular hole is cooperated with to install a connecting wire, and one end of the connecting wire is installed in cooperation with the monitoring mechanism, and the surface of one of the second U-shaped plates is located below the connecting wire and is rotatably connected to the first roller, and the inner wall of the second sunscreen is fixedly connected to the L-shaped block, and the surface of the L-shaped block is provided with a circular groove, and the wall of the circular groove is slidably connected to a T-shaped column, and the outer side of the T-shaped column is sleeved with a first spring, and the lower end of the T-shaped column is fixedly connected to the mounting block, and the second roller is rotatably connected between the two mounting blocks, and the second roller is installed in cooperation with the connecting wire, and the surface of the second roller is fixedly connected to the adjusting column.

[0007] Preferably, rectangular grooves are symmetrically provided on the surface of the first U-shaped plate close to the second U-shaped plate, and both of the rectangular grooves are slidably connected to the second U-shaped plate.

[0008] Preferably, a connection groove is provided on the surface of the first sunscreen close to the second sunscreen, and the connection groove is slidably connected to the second sunscreen.

[0009] Preferably, the end of the surface of the adjusting column away from the mounting block is slidably connected to an adjusting wheel, the surface of the adjusting wheel close to the mounting block is fixedly connected to a connecting spring, the end of the connecting spring away from the adjusting wheel is fixedly connected to a rotating disk, the surface of the rotating disk away from the adjusting disk is rotatably connected to a slider, the slider is slidably connected to the second sunscreen cover, and the surface of the slider is provided with limiting grooves evenly distributed in an annular shape, the limiting groove walls are slidably inserted with limiting columns, and the ends of multiple limiting columns away from the slider are fixedly connected to the adjusting wheel.

[0010] Preferably, one end of the surface of the adjustment column away from the mounting block is fixedly connected with a limiting strip evenly distributed in a ring shape, and multiple limiting strips are fixedly connected to the adjustment column, and multiple limiting strips are slidably connected to the adjustment wheel.

[0011] Preferably, the initial state of the connecting spring is a stretched state.

[0012] Preferably, the monitoring mechanism includes a temperature monitoring module, a stress monitoring module, a data acquisition and transmission module, a data processing and analysis module, an early warning and decision support module, and an energy supply and protection module. Each module realizes precise monitoring of temperature and stress coupling through real-time data interaction and collaborative decision-making.

[0013] Beneficial effects Compared with the prior art, the present invention has the following beneficial effects: The temperature and stress coupling monitoring device for the construction of a flying swallow-type arch bridge is equipped with a first roller, a second roller and a first spring. By utilizing the elastic force of the first spring, when the adjustment column is rotated, the connecting line can be retracted into the first sunscreen and the second sunscreen along the circular hole, so that the connecting line placed outside the sunscreen can be close to the bridge deck, thereby shortening the time required for the installation of multiple monitoring mechanisms and improving installation efficiency.

[0014] The temperature and stress coupling monitoring device for the construction of the flying swallow-type arch bridge, through the provided connecting spring, limit column and limit groove, utilizes the elastic force of the connecting spring so that the limit column can stably cooperate with the limit groove, so that the adjusting wheel can maintain a stable state after rotation adjustment, and utilizes the friction between the second roller and the connecting line, and the friction between the circular hole and the connecting line, so that the connecting line can be in a stable state in the first sunscreen and the second sunscreen, thereby ensuring stability after the line is reeled in. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the partial structure of the first roller and the second roller of the present invention; Figure 3 This is a schematic structural diagram of the present invention from another angle; Figure 4 The present invention Figure 3 Enlarged view of point A in the middle; Figure 5 It is a partial structural diagram of the monitoring mechanism of the present invention.

[0016] In the figure: 1. Mounting block; 2. Monitoring mechanism; 3. Bolt; 4. First U-shaped plate; 5. Second U-shaped plate; 6. First sunscreen; 7. Second sunscreen; 8. Round hole; 9. Connecting line; 10. First roller; 11. L-shaped block; 12. Round groove; 13. T-shaped column; 14. Second roller; 15. Adjusting column; 16. Adjusting wheel; 17. Connecting spring; 18. Rotating disk; 19. Slider; 20. Limiting groove; 21. Limiting column; 22. Limiting strip. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0018] See also Figures 1 to 5 A temperature and stress coupling monitoring device for the construction of a swallow-type arch bridge includes a mounting block 1, a monitoring mechanism 2 fixedly connected to the surfaces of two mounting blocks 1, and bolts 3 symmetrically mounted on the surfaces of the mounting blocks 1. There are four bolts 3, two of which are mounted with a first U-shaped plate 4 on the surface of two bolts 3, and a second U-shaped plate 5 is mounted with the surface of the other two bolts 3. The first U-shaped plate 4 is slidably connected to the second U-shaped plate 5. The upper surfaces of the two first U-shaped plates 4 are fixedly connected to a first sunscreen 6, and the upper surfaces of the two second U-shaped plates 5 are fixedly connected to a second sunscreen 7. The first sunscreen 6 is slidably connected to the second sunscreen 7, and the surface of the second sunscreen 7 is open. A circular hole 8 is provided, and a connecting line 9 is installed on the wall of the circular hole 8. One end of the connecting line 9 is installed in cooperation with the monitoring mechanism 2. The surface of one of the second U-shaped plates 5 is located below the connecting line 9 and is rotatably connected to the first roller 10. The inner wall of the second sunscreen 7 is fixedly connected to an L-shaped block 11. A circular groove 12 is provided on the surface of the L-shaped block 11. A T-shaped column 13 is slidably connected to the wall of the circular groove 12. A first spring is sleeved on the outer side of the T-shaped column 13. The lower end of the T-shaped column 13 is fixedly connected to the mounting block 1. A second roller 14 is rotatably connected between the two mounting blocks 1. The second roller 14 is installed in cooperation with the connecting line 9, and an adjusting column 15 is fixedly connected to the surface of the second roller 14.

[0019] Rectangular grooves are symmetrically formed on the surface of the first U-shaped plate 4 close to the second U-shaped plate 5 , and both rectangular grooves are slidably connected to the second U-shaped plate 5 .

[0020] A connecting groove is provided on the surface of the first sunscreen 6 close to the second sunscreen 7, and the connecting groove is slidably connected to the second sunscreen 7; It should be noted that the arrangement of the connecting groove and the rectangular groove can facilitate the coordinated installation and removal of the first sunshade 6 and the second sunshade 7, and the coordinated installation and removal of the first U-shaped plate 4 and the second U-shaped plate 5; It should be noted that the first U-shaped plate 4 and the first sunshade 6 can be fixedly connected by bolts 3 , and the second U-shaped plate 5 and the second sunshade 7 can be fixedly connected by bolts 3 , which facilitates disassembly and assembly.

[0021] An adjusting wheel 16 is slidably connected to one end of the surface of the adjusting column 15 away from the mounting block 1, and a connecting spring 17 is fixedly connected to the surface of the adjusting wheel 16 close to the mounting block 1. An end of the connecting spring 17 away from the adjusting wheel 16 is fixedly connected to a rotating disk 18, and a surface of the rotating disk 18 away from the adjusting disk is rotatably connected to a slider 19, and the slider 19 is slidably connected to the second sunscreen 7. A limiting groove 20 evenly distributed in an annular shape is opened on the surface of the slider 19, and a limiting column 21 is slidably inserted into the groove wall of the limiting groove 20, and the ends of the multiple limiting columns 21 away from the slider 19 are all fixedly connected to the adjusting wheel 16; It should be noted that, by simply pulling the adjusting wheel 16 in a direction away from the slider 19, the connecting spring 17 is further stretched, and relative movement occurs between the limiting column 21 and the limiting groove 20. After the limiting column 21 is separated from the limiting groove 20, the adjusting wheel 16 can be adjusted to rotate, and the adjusting column 15 rotates as the adjusting wheel 16 rotates, thereby driving the second roller 14 to rotate. The initial state of the first spring is a compressed state, so that the second roller 14 can be pressed toward the connecting line 9 to ensure that there is sufficient friction between the connecting line 9 and the second roller 14. The rotation of the second roller 14 can drive the connecting line 9 to shrink toward the inside of the first sunscreen 6 and the second sunscreen 7, so that the whole has a winding function, thereby shortening the time required for the installation of multiple monitoring mechanisms 2 and improving the installation efficiency.

[0022] The end of the surface of the adjustment column 15 away from the mounting block 1 is fixedly connected to a ring-shaped uniformly distributed limiting strip 22, and multiple limiting strips 22 are fixedly connected to the adjustment column 15, and multiple limiting strips 22 are slidably connected to the adjustment wheel 16; It should be noted that the setting of the limiting strip 22 can ensure that when the adjusting wheel 16 rotates, the adjusting column 15 can be stably driven to rotate, and thus the second roller 14 can be stably driven to rotate.

[0023] The initial state of the connecting spring 17 is a stretched state; It should be noted that the reaction force generated by the extension of the connecting spring 17 acts on the surface of the adjusting wheel 16 , so that the limiting column 21 and the limiting groove 20 are stably matched.

[0024] Monitoring mechanism 2 includes a temperature monitoring module, a stress monitoring module, a data acquisition and transmission module, a data processing and analysis module, an early warning and decision support module, and an energy supply and protection module. Each module achieves precise monitoring of temperature and stress coupling through real-time data interaction and collaborative decision-making; It should be noted that the temperature monitoring module can collect the temperature field distribution of key parts of the bridge (such as arch ribs, tie rods, hangers, and concrete pouring layers) in real time. It uses high-precision fiber Bragg grating temperature sensors or distributed fiber optic temperature measurement systems to cover the entire bridge section. For the concrete hydration heat stage, wireless embedded temperature sensors are added to monitor the internal temperature rise gradient. Combined with environmental temperature sensors (such as wind speed and solar radiation sensors), it analyzes the impact of external climate on structural temperature. The stress monitoring module dynamically monitors the stress state of the bridge structure under construction loads, temperature deformation, and other factors. Vibrating wire strain gauges or fiber Bragg grating strain sensors are embedded on or inside key components such as arch ribs and tie rods. Magnetic flux sensors or pressure rings are used to measure the cable tension in the suspenders in real time. Dynamic stress changes caused by structural vibration are monitored using integrated acceleration sensors. The data acquisition and transmission module can synchronously collect temperature and stress data and transmit them to the central processing unit via wired or wireless means. It uses a multi-channel data acquisition instrument and supports high sampling rates (≥100Hz) to capture transient responses. It achieves remote real-time transmission via industrial Ethernet, LoRa or 5G communication technology, and is equipped with data caching and breakpoint resume functions to ensure data integrity. The data processing and analysis module can pre-process the raw data, extract features, and analyze coupling effects. It uses wavelet transform or Kalman filtering to eliminate environmental noise interference, establishes a mathematical model based on thermoelasticity theory, quantifies the impact of temperature deformation on stress distribution, and uses machine learning algorithms (such as LSTM neural networks) to predict the long-term trend of structural stress changes with temperature. The early warning and decision support module can generate safety warnings based on analysis results and provide construction adjustment suggestions. It sets multi-level thresholds (such as yellow warning and red alert) and triggers sound and light alarms when stress or temperature exceeds the safe range. It combines the BIM model to visualize stress-temperature cloud maps, assisting engineers in locating risk points and outputting decision-making suggestions for optimizing construction parameters (such as concrete pouring time and tensioning sequence). The energy supply and protection module can provide a stable power supply for the monitoring equipment and ensure its reliability in harsh environments. It adopts a solar + battery dual power supply system to meet the needs of long-term outdoor monitoring. The sensor housing adopts IP68 protection level, has lightning protection, corrosion resistance, and anti-electromagnetic interference capabilities, and has an integrated self-heating function to prevent the sensor from freezing and failure in low temperature environments. Data flow relationship: The temperature monitoring module and the stress monitoring module collect data in parallel, and upload the data to the data processing and analysis module synchronously through the data acquisition and transmission module; The data processing and analysis module performs fusion analysis on temperature-stress data and generates a coupling effect report; The early warning and decision support module triggers early warnings based on analysis results and feeds back decision suggestions to the construction control system; Collaborative control relationship: The temperature monitoring module monitors the hydration heat rise of concrete in real time. When the internal temperature gradient exceeds the threshold, the early warning and decision support module is triggered to recommend adjustment of maintenance measures (such as spray cooling); When the stress monitoring module detects abnormal cable tension in the boom, the data processing and analysis module combines the current temperature data to determine whether it is caused by temperature deformation to avoid false alarms; The energy supply and protection module automatically adjusts the sensor operating mode according to the ambient temperature (such as starting self-heating at low temperatures) to ensure data acquisition stability; Closed-loop feedback relationship: The output of the early warning and decision support modules can be linked to the control system of construction machinery (such as tensioning equipment and concrete pump trucks) to achieve dynamic adjustment of construction parameters; The adjusted construction data (such as tensioning force and pouring speed) are fed back to the data processing and analysis module through the data acquisition and transmission module to verify the control effect and optimize the model parameters.

[0025] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A temperature and stress coupling monitoring device for the construction of a flying swallow arch bridge, comprising a mounting block (1), a monitoring mechanism (2) fixedly connected to the surfaces of two mounting blocks (1), and bolts (3) symmetrically mounted on the surfaces of the mounting blocks (1), characterized in that: There are four bolts (3), wherein the surfaces of two of the bolts (3) are fitted with first U-shaped plates (4), and the surfaces of the other two of the bolts (3) are fitted with second U-shaped plates (5), the first U-shaped plates (4) and the second U-shaped plates (5) are slidably connected, the upper surfaces of the two first U-shaped plates (4) are fixedly connected with first sunshades (6), the upper surfaces of the two second U-shaped plates (5) are fixedly connected with second sunshades (7), the first sunshade (6) and the second sunshade (7) are slidably connected, a circular hole (8) is provided on the surface of the second sunshade (7), and a connecting wire (9) is fitted with the wall of the circular hole (8), one end of the connecting wire (9) is connected to the monitoring mechanism ( 2) Coordinated installation, wherein the surface of one of the second U-shaped plates (5) is located below the connecting line (9) and is rotatably connected to a first roller (10), the inner wall of the second sunscreen (7) is fixedly connected to an L-shaped block (11), a circular groove (12) is provided on the surface of the L-shaped block (11), a T-shaped column (13) is slidably connected to the wall of the circular groove (12), a first spring is sleeved on the outer side of the T-shaped column (13), the lower end of the T-shaped column (13) is fixedly connected to a mounting block (1), a second roller (14) is rotatably connected between the two mounting blocks (1), the second roller (14) is cooperatively installed with the connecting line (9), and an adjustment column (15) is fixedly connected to the surface of the second roller (14).

2. The temperature and stress coupled monitoring device for the construction of a flying swallow arch bridge according to claim 1, characterized in that: Rectangular grooves are symmetrically provided on the surface of the first U-shaped plate (4) close to the second U-shaped plate (5), and both of the rectangular grooves are slidably connected to the second U-shaped plate (5).

3. The temperature and stress coupled monitoring device for the construction of a flying swallow arch bridge according to claim 1, characterized in that: A connection groove is provided on the surface of the first sunscreen (6) close to the second sunscreen (7), and the connection groove is slidably connected to the second sunscreen (7).

4. The temperature and stress coupled monitoring device for the construction of a flying swallow arch bridge according to claim 1, characterized in that: The end of the surface of the adjusting column (15) away from the mounting block (1) is slidably connected to the adjusting wheel (16), the surface of the adjusting wheel (16) close to the mounting block (1) is fixedly connected to the connecting spring (17), the end of the connecting spring (17) away from the adjusting wheel (16) is fixedly connected to the rotating disk (18), the surface of the rotating disk (18) away from the adjusting disk is rotatably connected to the slider (19), the slider (19) is slidably connected to the second sunscreen (7), the surface of the slider (19) is provided with limiting grooves (20) uniformly distributed in an annular shape, the groove wall of the limiting groove (20) is slidably inserted with limiting columns (21), and the ends of the plurality of limiting columns (21) away from the slider (19) are all fixedly connected to the adjusting wheel (16).

5. The temperature and stress coupled monitoring device for the construction of a flying swallow arch bridge according to claim 4, characterized in that: An end of the surface of the adjustment column (15) away from the mounting block (1) is fixedly connected to a limiting strip (22) evenly distributed in a ring shape, and a plurality of the limiting strips (22) are fixedly connected to the adjustment column (15), and a plurality of the limiting strips (22) are slidably connected to the adjustment wheel (16).

6. The temperature and stress coupled monitoring device for the construction of a flying swallow arch bridge according to claim 4, characterized in that: The initial state of the connecting spring (17) is a stretched state.

7. The temperature and stress coupled monitoring device for the construction of a flying swallow arch bridge according to claim 1, characterized in that: The monitoring mechanism (2) includes a temperature monitoring module, a stress monitoring module, a data acquisition and transmission module, a data processing and analysis module, an early warning and decision support module, and an energy supply and protection module. Each module realizes accurate monitoring of temperature and stress coupling through real-time data interaction and collaborative decision-making.

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