A monitoring type water level warning device for a foundation pit of a underpass

Abstract

The application relates to the technical field of water level monitoring devices, and discloses a monitoring type underpass tunnel foundation pit water level warning device and a method thereof, which comprises a base, a support column is arranged on the top of the base, a top plate is arranged on the top of the support column, and an alarm is arranged on the top of the top plate; a mounting mechanism is arranged between the support column and the base, the base is in an arc shape and can adapt to the shape of a tunnel foundation pit, the mounting mechanism comprises a dismounting assembly, a rotating assembly and a limiting assembly, the dismounting assembly is arranged on the top of the base, the rotating assembly is arranged in the dismounting assembly, and the limiting assembly is arranged between the support column and the base; through the arc design of the base, the base can better adapt to the shape of the tunnel foundation pit; through the arrangement of the dismounting assembly, the mutual cooperation of the abutting blocks and the dismounting plates facilitates the dismounting of the base, the base can be flexibly matched according to the radii of different foundation pits, the adhesion of the device to the surface of the foundation pit is greatly improved, and the installation of the device in the foundation pit is more firm and stable.

Description

Technical Field

[0001] This invention relates to the field of water level monitoring equipment technology, specifically to a monitoring-type water level warning device for underpass tunnel foundation pits. Background Technology

[0002] In urban transportation construction, underpasses are important infrastructure for alleviating traffic pressure and improving urban traffic flow. They can monitor the water level in the pit in real time. Once the water level reaches or exceeds the preset safety threshold, a warning signal will be issued quickly, providing a reliable basis for relevant personnel to take timely countermeasures and ensure the safety of tunnel pit construction and operation.

[0003] Traditional devices are installed in suitable locations within the tunnel pit, with the base and components secured, power supply and necessary wiring connected. Water level monitoring thresholds and warning mechanisms are set according to pit safety standards. Real-time automatic monitoring of the pit's water level then begins, with sensors continuously collecting data and transmitting it to the control unit for analysis. If the water level reaches the threshold, the device issues preset audible and visual warnings, prompting personnel to take appropriate measures. After handling the situation, the device can be reset to continue monitoring. However, installing such devices within the tunnel pit is difficult due to the varying curvature of the pit, resulting in poor fit between the device and the pit surface. This leads to insecure installation, causing shaking, displacement, or even tipping during subsequent use, affecting the device's normal operation and lifespan. Furthermore, unsuitable bases can cause sensor misalignment, hindering accurate water level detection and resulting in inaccurate monitoring data. This, in turn, affects the timeliness and reliability of pit water level assessment and early warning. Summary of the Invention

[0004] The purpose of this invention is to provide a monitoring-type underpass tunnel foundation pit water level warning device, which solves the problem in the prior art that when installing the above-mentioned device in the tunnel foundation pit, it is difficult to change the base according to the curvature of different foundation pits, resulting in poor fit between the device and the foundation pit surface, and thus the device is not firmly installed in the foundation pit.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A monitoring-type underpass tunnel foundation pit water level warning device includes:

[0007] The base has a support column installed on its top, a top plate is provided on the top of the support column, an alarm is installed on the top of the top plate, and a water level ring one and a water level ring two are provided on the outer wall of the support column.

[0008] An adjustment mechanism is located between the top plate and the support column and is used to adjust the height of the alarm.

[0009] An installation mechanism is located between a support column and a base, and is used to install the base. The base is arc-shaped and can adapt to the shape of the tunnel pit. The installation mechanism includes a disassembly / assembly component, a rotation component, and a limiting component. The disassembly / assembly component is located at the top of the base and is used to separate the base from the support column. The rotation component is located inside the disassembly / assembly component and is used to facilitate the disassembly / assembly of the disassembly / assembly component. The limiting component is located between the support column and the base and is used to limit the support column. The rotation component includes a support plate fixedly installed at the bottom of the rotating seat. A hinge seat is fixedly installed at the bottom of the support plate. An adjusting shaft is fixedly installed in the middle of the hinge seat. Adjusting seats are installed on both sides of the adjusting shaft. A positioning seat is fixedly installed at the bottom of the joint seat. The positioning seat, which is fixed together by two adjusting seats, can be flexibly adjusted in angle and position according to the actual installation situation, so that the device can better adapt to the foundation pit with different curvatures during installation. The disassembly and assembly assembly includes a mounting plate fixedly installed at the bottom of the positioning seat, and a disassembly plate fixedly installed at the bottom of the mounting plate. The top of the base has a mounting groove for inserting the disassembly plate. An abutting component is provided between the positioning seat and the mounting groove to abut the disassembly plate. The abutting component between the positioning seat and the mounting groove can further fix the disassembly plate. Through the action of the abutting component, the disassembly plate can be firmly fixed in the mounting groove, ensuring the firmness of the device installation, and also facilitating the disassembly plate when needed. For disassembly and replacement, the abutment assembly includes a movable groove formed on one side of the mounting groove. The positioning seat is U-shaped, and a control sleeve is fitted on the outer wall of the positioning seat. Two connecting blocks are fixedly installed at the bottom of the control sleeve. The two connecting blocks extend into the interior of the movable groove and jointly fix the abutment block. A compression spring connects the abutment block and the movable groove. When the control sleeve moves, the connecting blocks will drive the abutment block to move within the movable groove. Through the elastic force of the compression spring connecting the abutment block and the movable groove, during installation, the compression spring can make the abutment block tightly abut against the disassembly plate, enhancing the stability of the connection. During disassembly, the elastic force of the spring can be overcome by operating the control sleeve, facilitating disassembly. The limiting assembly includes an insert plate fixedly installed on one side of the mounting seat. An extension block is fixedly installed on one side of the base, and a limiting seat is fixedly installed on the top of the extension block. A limiting cavity is opened in the middle of the limiting seat, and a sliding plate is slidably installed inside the limiting cavity. Limiting plates are fixedly installed on both sides of the sliding plate, and the top of the limiting plate has a socket for inserting a plate. When the plate is inserted into the socket, it can further limit the mounting base, preventing horizontal displacement of the device during use and further enhancing the overall stability of the device. Balance plates are fixedly installed on both sides of the base. Multiple balance plates are arc-shaped, and the curvature of multiple balance plates is the same as that of the base. The presence of balance plates can effectively prevent the device from tilting or shaking during use, ensuring that the device can operate stably.

[0010] Preferably, the installation mechanism further includes a mounting base fixedly installed at the bottom of the support column. Two fixing blocks are fixedly installed at the bottom of the mounting base, and a fixing rod is fixedly installed between the two fixing blocks. Two sets of rotating seats are rotatably installed on the outer wall of the fixing rod. The two sets of rotating seats are symmetrically distributed on the outer wall of the fixing rod. The symmetrical design makes the force on the device more uniform during installation, which facilitates the installation and adjustment of subsequent components and can better adapt to different installation environments and needs.

[0011] Preferably, the control sleeve has control grooves on both sides, and both the base and the control sleeve are arc-shaped with the same degree of curvature between them. The control grooves on the control sleeve provide the operator with a point of leverage for operation, facilitating the movement and adjustment of the control sleeve. The fact that both the base and the control sleeve are arc-shaped with the same degree of curvature allows the control sleeve to fit snugly against the base, resulting in a more harmonious appearance and a tighter fit between the control sleeve and the base during installation and use, preventing loosening or shaking and further improving the stability of the device installation.

[0012] Preferably, the adjustment mechanism includes an adjustment cavity formed inside the support column. An electric push rod is fixedly installed at the bottom of the adjustment cavity. The telescopic end of the electric push rod is connected to a movable column. The top of the movable column is fixedly connected to the bottom of the top plate. Multiple evenly distributed reinforcing plates are fixedly installed on the top of the movable column and the bottom of the top plate. A sealing strip is provided between the top of the support column and the movable column. The evenly distributed reinforcing plates between the movable column and the bottom of the top plate enhance the strength of the connection between them and ensure the stability of the structure. The sealing strip between the top of the support column and the movable column plays a sealing role to prevent dust, water and other debris from entering the adjustment cavity and affecting the normal operation of the electric push rod.

[0013] Preferably, water level contact strips are fixedly installed at the bottom of both water level ring one and water level ring two, and water level sensors are fixedly installed at the top of both water level ring one and water level ring two. Multiple evenly distributed reinforcing rods are fixedly installed inside both water level ring one and water level ring two. The two sets of reinforcing rods are respectively fixedly connected to the movable column and the support column. A monitoring box is fixedly installed on the top of the top plate. The monitoring box is connected to an alarm and contains a battery. A support base is fixedly installed on the top of the monitoring box, and a light is installed on one side of the support base. The water level contact strips at the bottom of water level ring one and water level ring two can directly contact the water level. When the water level rises above the specified value... When the water level rises, the water level contact strip transmits the water level information to the water level sensor at the top. The water level sensor can accurately detect changes in water level and transmit the signal to the monitoring box. The reinforcing rods evenly distributed inside the water level ring are fixedly connected to the movable column and the support column, which enhances the structural strength of the water level ring and ensures its stability during use. The monitoring box at the top of the top plate receives the signal from the water level sensor and controls the alarm to issue a warning according to the preset program. The lighting installed on one side of the support base at the top of the monitoring box makes it convenient to check the operation of the device and the water level of the foundation pit at night or in low light conditions, and also facilitates the construction work of the staff.

[0014] A monitoring-based method for warning of water level in the foundation pit of an underpass tunnel includes the following steps:

[0015] S1. Installation preparation: Select a base and balance plate with appropriate curvature according to the actual shape and size of the tunnel pit to ensure that the device fits well with the tunnel pit.

[0016] S2. Base installation: Place the base at the predetermined position in the tunnel pit, making the arc shape of the base conform to the shape of the tunnel pit, and use the balance plates on both sides of the base to ensure the stability of the device.

[0017] S3. Hold the rotating seat and rotate it around the fixed rod to adjust the angle of the support plate, thereby moving the adjusting seat and the positioning seat so that the disassembly plate at the bottom of the mounting plate is aligned with the mounting groove at the top of the base.

[0018] S4. Insert the disassembly plate into the mounting slot, and at the same time control the control sleeve to make the connecting block slide in the moving slot, which will drive the abutment block to squeeze the compression spring until the disassembly plate is fully inserted into the mounting slot. At this time, release the control sleeve, the compression spring will rebound, and the abutment block will abut the disassembly plate, completing the initial connection between the support column and the base.

[0019] S5. Insert the insert plate on one side of the mounting base into the insertion hole at the top of the limiting plate, and push the slide plate to slide in the limiting cavity of the limiting base so that the insert plate is fully inserted into the insertion hole and fixed, further strengthening the connection stability between the support column and the base.

[0020] S6. Start the electric push rod. The telescopic end of the electric push rod drives the movable column to move up and down in the adjustment cavity of the support column, thereby adjusting the height of the top plate and the alarm installed on the top plate to adapt to different monitoring needs. During the adjustment process, the sealing strip between the top of the support column and the movable column is used to prevent dust and water from entering the adjustment cavity.

[0021] S7. Fix water level ring one and water level ring two to the movable column and support column respectively through the reinforcing rod to ensure that the water level contact strip can contact the water in the tunnel pit;

[0022] S8. Connect the power supply to the monitoring box, start the water level sensor, simulate different water level conditions, observe whether the alarm works normally, and whether the lighting works normally to ensure that the entire water level monitoring system is operating normally.

[0023] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0024] 1. The device features an arc-shaped base, which better adapts to the shape of the tunnel pit. The detachable components, utilizing the interaction between the contact block and the disassembly plate, facilitate easy disassembly of the base. This allows for flexible matching to different pit curvatures, significantly improving the device's fit to the pit surface. This results in a more secure and stable installation within the pit, preventing shaking, displacement, or even tipping during subsequent use. This provides a solid guarantee for the normal operation of the device and effectively extends its service life. Furthermore, the limiting components ensure greater stability of the installed top plate, preventing tipping.

[0025] 2. By improving the adaptability of the base, this device avoids the problem of sensor installation position deviation caused by an unsuitable base. The water level contact strip at the bottom of water level ring one and water level ring two, as well as the water level sensor at the top, can be accurately installed in the appropriate position, thereby accurately sensing water level changes, ensuring the accuracy of monitoring data, greatly improving the timeliness and reliability of early warning, and enabling staff to take timely countermeasures to ensure the safety and stability of the tunnel foundation pit. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a cross-sectional view of the monitoring and control system of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the second water level ring of the present invention;

[0029] Figure 4 This is a schematic diagram of the adjustment mechanism of the present invention;

[0030] Figure 5This is a schematic diagram of the overall structure of the installation mechanism of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the limiting component of the present invention;

[0032] Figure 7 This is a schematic diagram of the rotating component of the present invention;

[0033] Figure 8 This is one of the structural schematic diagrams of the disassembly component of the present invention;

[0034] Figure 9 This is the second structural schematic diagram of the disassembly component of the present invention;

[0035] Figure 10 This is a flowchart of the entire invention.

[0036] The components include: 1. Base; 2. Mounting mechanism; 3. Balance plate; 4. Support column; 5. Water level ring one; 6. Water level ring two; 7. Top plate; 8. Alarm; 9. Monitoring box; 10. Lighting; 11. Support base; 12. Battery; 13. Water level contact strip; 14. Reinforcing rod; 15. Water level sensor; 16. Movable column; 17. Sealing strip; 18. Electric push rod.

[0037] 21. Extension block; 22. Mounting base; 23. Mounting plate; 24. Positioning base; 25. Support plate; 26. Rotating base; 27. Limiting plate; 28. Insert plate; 29. ​​Slide plate; 210. Limiting base; 211. Fixing block; 212. Fixing rod; 213. Hinge base; 214. Adjusting shaft; 215. Adjusting base; 216. Control sleeve; 217. Disassembly plate; 218. Abutment block; 219. Compression spring; 220. Moving groove; 221. Connecting block. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] refer to Figures 1-4 A monitoring-type underpass tunnel foundation pit water level warning device, comprising:

[0040] The base 1 has a support column 4 installed on its top, a top plate 7 installed on the top of the support column 4, an alarm 8 installed on the top of the top plate 7, and a water level ring 1 5 and a water level ring 2 6 installed on the outer wall of the support column 4.

[0041] An adjustment mechanism is located between the top plate 7 and the support column 4 and is used to adjust the height of the alarm 8. The adjustment mechanism includes an adjustment cavity opened inside the support column 4. An electric push rod 18 is fixedly installed at the bottom of the adjustment cavity. The telescopic end of the electric push rod 18 is connected to a movable column 16. The top of the movable column 16 is fixedly connected to the bottom of the top plate 7. Multiple evenly distributed reinforcing plates are fixedly installed between the top of the movable column 16 and the bottom of the top plate 7. A sealing strip 17 is provided between the top of the support column 4 and the movable column 16.

[0042] Furthermore, balance plates 3 are fixedly installed on both sides of the base 1. The multiple balance plates 3 are all arc-shaped, and the curvature of the multiple balance plates 3 is the same as that of the base 1.

[0043] Furthermore, such as Figure 2 and Figure 3 As shown, water level contact strips 13 are fixedly installed at the bottom of water level ring 5 and water level ring 6, and water level sensors 15 are fixedly installed at the top of water level ring 5 and water level ring 6. Multiple evenly distributed reinforcing rods 14 are fixedly installed inside water level ring 5 and water level ring 6. The two sets of reinforcing rods 14 are fixedly connected to the movable column 16 and the support column 4 respectively. A monitoring box 9 is fixedly installed on the top of the top plate 7. The monitoring box 9 is connected to the alarm 8, and a battery 12 is installed inside the monitoring box 9. A support base 11 is fixedly installed on the top of the monitoring box 9, and a lighting lamp 10 is installed on one side of the support base 11.

[0044] refer to Figures 5-9 The installation mechanism 2 is located between the support column 4 and the base 1 and is used to install the base 1. The base 1 is arc-shaped and can adapt to the shape of the tunnel pit. The installation mechanism 2 includes a disassembly assembly, a rotation assembly, and a limiting assembly. The disassembly assembly is located on the top of the base 1 and is used to separate the base 1 from the support column 4. The rotation assembly is located inside the disassembly assembly and is used to facilitate the disassembly and assembly of the disassembly assembly. The limiting assembly is located between the support column 4 and the base 1 and is used to limit the support column 4.

[0045] The mounting mechanism 2 also includes a mounting base 22 fixedly installed at the bottom of the support column 4. Two fixing blocks 211 are fixedly installed at the bottom of the mounting base 22, and a fixing rod 212 is fixedly installed between the two fixing blocks 211. Two sets of rotating seats 26 are rotatably installed on the outer wall of the fixing rod 212, and the two sets of rotating seats 26 are symmetrically distributed.

[0046] Furthermore, the rotating assembly includes a support plate 25 fixedly installed at the bottom of the rotating seat 26, a hinge seat 213 fixedly installed at the bottom of the support plate 25, an adjusting shaft 214 fixedly installed at the middle of the hinge seat 213, adjusting seats 215 installed on both sides of the adjusting shaft 214, and a positioning seat 24 fixedly installed at the bottom of the two adjusting seats 215.

[0047] Furthermore, the disassembly and assembly components include a mounting plate 23 fixedly installed at the bottom of the positioning seat 24, a disassembly plate 217 fixedly installed at the bottom of the mounting plate 23, a mounting groove for inserting the disassembly plate 217 is provided at the top of the base 1, and an abutting component for abutting the disassembly plate 217 is provided between the positioning seat 24 and the mounting groove.

[0048] Furthermore, the abutment component includes a movable groove 220 formed on one side of the mounting groove, a positioning seat 24 in the shape of a U, and a control sleeve 216 fitted on the outer wall of the positioning seat 24. Two connecting blocks 221 are fixedly installed at the bottom of the control sleeve 216. The two connecting blocks 221 extend into the interior of the movable groove 220 and are fixedly installed together with an abutment block 218. A compression spring 219 is connected between the abutment block 218 and the movable groove 220. Based on this, control grooves are formed on both sides of the control sleeve 216. Both the base 1 and the control sleeve 216 are arc-shaped, and the arc degree between the control sleeve 216 and the base 1 is the same.

[0049] Furthermore, as shown in the figure, the limiting component includes an insert plate 28 fixedly installed on one side of the mounting base 22, an extension block 21 fixedly installed on one side of the base 1, a limiting seat 210 fixedly installed on the top of the extension block 21, a limiting cavity opened in the middle of the limiting seat 210, a sliding plate 29 slidably installed inside the limiting cavity, limiting plates 27 fixedly installed on both sides of the sliding plate 29, and an insertion hole for inserting the insert plate 28 opened on the top of the limiting plate 27;

[0050] A monitoring-based method for warning of water level in the foundation pit of an underpass tunnel includes the following steps:

[0051] S1. Installation preparation: Based on the actual shape and size of the tunnel foundation pit, select a base 1 and a balance plate 3 with appropriate curvature to ensure that the device fits well with the tunnel foundation pit.

[0052] S2. Base Installation: Place base 1 at the predetermined position in the tunnel pit, ensuring that the arc shape of base 1 conforms to the shape of the tunnel pit. The stability of the device is ensured by using the balancing plates 3 on both sides of base 1.

[0053] S3. Hold the rotating seat 26 and rotate it around the fixed rod 212 to adjust the angle of the support plate 25, thereby driving the adjusting seat 215 and the positioning seat 24 to move so that the disassembly plate 217 at the bottom of the mounting plate 23 is aligned with the mounting groove at the top of the base 1.

[0054] S4. Insert the disassembly plate 217 into the mounting slot, and at the same time control the control sleeve 216 to make the connecting block 221 slide in the moving slot 220, which will drive the abutment block 218 to squeeze the compression spring 219 until the disassembly plate 217 is fully inserted into the mounting slot. At this time, release the control sleeve 216, the compression spring 219 will rebound, and the abutment block 218 will abut the disassembly plate 217, thus completing the initial connection between the support column 4 and the base 1.

[0055] S5. Insert the insert plate 28 on one side of the mounting base 22 into the insertion hole at the top of the limiting plate 27, and push the sliding plate 29 to slide in the limiting cavity of the limiting base 210 so that the insert plate 28 is fully inserted into the insertion hole and fixed, further strengthening the connection stability between the support column 4 and the base 1.

[0056] S6. Start the electric push rod 18. The telescopic end of the electric push rod 18 drives the movable column 16 to move up and down in the adjustment cavity of the support column 4, thereby adjusting the height of the top plate 7 and the alarm 8 installed on the top plate 7 to adapt to different monitoring needs. During the adjustment process, the sealing strip 17 between the top of the support column 4 and the movable column 16 is used to prevent dust and water from entering the adjustment cavity.

[0057] S7. Water level ring 15 and water level ring 26 are fixedly connected to movable column 16 and support column 4 respectively through reinforcing rod 14 to ensure that water level contact strip 13 can contact the water in the tunnel pit.

[0058] S8. Connect the power supply to the monitoring box 9, start the water level sensor 15, simulate different water level conditions, observe whether the alarm 8 alarms normally, and whether the lighting 10 works normally, to ensure that the entire water level monitoring system operates normally.

[0059] The overall working principle of this invention is as follows:

[0060] Water level ring 5 and water level ring 6 are distributed on the outer wall of the support column 4. When the water level in the pit rises and contacts the water level contact strip 13 at the bottom of water level ring 5 or water level ring 6, the water level sensor 15 will sense the water level change and transmit the water level information to the monitoring box 9. After receiving the information, the monitoring box 9 will analyze and process it. The monitoring box 9 also uses the finite element structural analysis software Midas. The GTS simulation verification of the anti-buoyancy design scheme establishes a qualitative and quantitative analysis model to predict and evaluate the stability of the foundation pit excavation and urban vehicular underpass construction process. Based on the geological survey results, qualitative and quantitative analysis is conducted to analyze geological data and perform anti-buoyancy structure design analysis for the tunnel. From geological and hydrological research to the selection of anti-buoyancy structure and the verification of anti-buoyancy capacity, the construction process is simulated using finite element analysis software to verify the original anti-buoyancy design. The buoyancy force of groundwater on the structure at different construction stages is analyzed to guide construction. The selection of anti-buoyancy scheme, the determination method of anti-buoyancy design water level and buoyancy force, and the design points of anti-buoyancy piles are also discussed. At the same time, the simulation analysis can also be performed during the tunnel operation period, including the pumping and drainage capacity of the vehicular underpass tunnel and the stability analysis of the tunnel itself under extreme weather conditions such as rainstorms, to ensure the safety of the tunnel structure and transportation during the operation period.

[0061] Battery 12 provides power to the entire monitoring and warning device. If the water level reaches the set danger value, the monitoring box 9 will trigger the alarm 8 to issue a warning signal, reminding staff to take timely measures. In addition, the lighting 10 on one side of the top support 11 of the top plate 7 can provide lighting at night or in low light conditions, making it easier for staff to check the situation on site.

[0062] The adjustment mechanism is used to adjust the height of the alarm 8 to adapt to different monitoring needs. When the height needs to be adjusted, the electric push rod 18 is activated to drive the movable column 16 to move up and down. The up and down movement of the movable column 16 causes the top plate 7 to move synchronously. The movement of the top plate 7 can drive the water level ring 6 to move synchronously, so as to adapt to different water level alarms. The sealing strip 17 can prevent debris and water from entering the adjustment chamber, thereby protecting the electric push rod 18 and other components.

[0063] When it is necessary to disassemble the base 1, first pull the control sleeve 216 to drive the two connecting blocks 221 to move synchronously. The movement of the connecting blocks 221 drives the abutment block 218 to move. The movement of the abutment block 218 causes the compression spring 219 to contract. The contraction of the compression spring 219 causes the abutment block 218 to move within the moving groove 220. The movement of the abutment block 218 separates it from the mounting groove, thus separating it synchronously from the disassembly plate 217. Then, move the mounting plate 23 to drive the disassembly plate 217 to move within the mounting groove and the moving groove 220. When the disassembly plate 217 and the moving groove 220 correspond to each other, pull the positioning seat 24 to drive the mounting plate 23 to move. The movement of the mounting plate 23 drives the disassembly plate 217 to move synchronously until it separates from the moving groove 220, thus disassembling the base 1. Similarly, by using the elastic force of the compression spring 219, different bases 1 can be installed when replacing them.

[0064] By setting the fixing rod 212, the support plate 25 and the rotating seat 26 can rotate in a circle around the fixing rod 212. By setting the adjusting shaft 214, the mounting plate 23 and the disassembly plate 217 can rotate in a circle around the adjusting shaft 214. Therefore, this device can adapt to and replace bases 1 of different specifications, greatly improving the flexibility of the invention.

[0065] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A monitoring-type underpass tunnel foundation pit water level warning device, characterized in that, include: The base (1) has a support column (4) installed on its top, a top plate (7) is provided on the top of the support column (4), an alarm (8) is installed on the top of the top plate (7), and a water level ring one (5) and a water level ring two (6) are provided on the outer wall of the support column (4). An adjustment mechanism is located between the top plate (7) and the support column (4) and is used to adjust the height of the alarm (8); The installation mechanism (2) is located between the support column (4) and the base (1) and is used to install the base (1). The base (1) is arc-shaped and can adapt to the shape of the tunnel pit. The installation mechanism (2) includes a disassembly assembly, a rotation assembly, and a limiting assembly. The disassembly assembly is located on the top of the base (1) and is used to separate the base (1) from the support column (4). The rotation assembly is located inside the disassembly assembly and is used to facilitate the disassembly assembly and disassembly of the disassembly assembly. The limiting assembly is located between the support column (4) and the base (1) and is used to limit the support column (4). The rotation assembly includes a support plate (25) fixedly installed at the bottom of the rotating seat (26). A hinge seat (213) is fixedly installed at the bottom of (25). An adjusting shaft (214) is fixedly installed in the middle of the hinge seat (213). Adjusting seats (215) are installed on both sides of the adjusting shaft (214). A positioning seat (24) is fixedly installed at the bottom of the two adjusting seats (215). The disassembly assembly includes a mounting plate (23) fixedly installed at the bottom of the positioning seat (24). A disassembly plate (217) is fixedly installed at the bottom of the mounting plate (23). An installation groove for inserting the disassembly plate (217) is provided at the top of the base (1). An abutting component for abutting the disassembly plate (217) is provided between the positioning seat (24) and the installation groove. The abutting component includes components provided on the mounting plate (25). The moving groove (220) on one side of the groove, the positioning seat (24) is U-shaped, and the outer wall of the positioning seat (24) is fitted with a control sleeve (216). Two connecting blocks (221) are fixedly installed at the bottom of the control sleeve (216). The two connecting blocks (221) extend into the interior of the moving groove (220) and are jointly fixedly installed with an abutment block (218). A compression spring (219) is connected between the abutment block (218) and the moving groove (220). The limiting assembly includes an insert plate (28) fixedly installed on one side of the mounting seat (22). An extension block (21) is fixedly installed on one side of the base (1). A limiting seat (210) is fixedly installed on the top of the extension block (21). The limiting seat (210) has... A limiting cavity is provided in the middle, and a sliding plate (29) is slidably installed inside the limiting cavity. Limiting plates (27) are fixedly installed on both sides of the sliding plate (29). The top of the limiting plate (27) is provided with a socket for inserting a plate (28). The adjustment mechanism includes an adjustment cavity opened inside the support column (4). An electric push rod (18) is fixedly installed at the bottom of the adjustment cavity. The telescopic end of the electric push rod (18) is connected to a movable column (16). The top of the movable column (16) is fixedly connected to the bottom of the top plate (7). Multiple evenly distributed reinforcing plates are fixedly installed on the top of the movable column (16) and the bottom of the top plate (7). A sealing strip (17) is provided between the top of the support column (4) and the movable column (16).Balance plates (3) are fixedly installed on both sides of the base (1). Each balance plate (3) is arc-shaped, and the curvature of each balance plate (3) is the same as that of the base (1).

2. The monitoring-type underpass tunnel foundation pit water level warning device according to claim 1, characterized in that: The installation mechanism (2) also includes a mounting base (22) fixedly installed at the bottom of the support column (4). Two fixing blocks (211) are fixedly installed at the bottom of the mounting base (22). A fixing rod (212) is fixedly installed between the two fixing blocks (211). Two sets of rotating seats (26) are rotatably installed on the outer wall of the fixing rod (212). The two sets of rotating seats (26) are symmetrically distributed.

3. The monitoring-type underpass tunnel foundation pit water level warning device according to claim 1, characterized in that: The control sleeve (216) has control slots on both sides. The base (1) and the control sleeve (216) are both arc-shaped, and the arc degree between the control sleeve (216) and the base (1) is the same.

4. A monitoring-type underpass tunnel foundation pit water level warning device according to any one of claims 1-3, characterized in that: Water level contact strips (13) are fixedly installed at the bottom of water level ring 1 (5) and water level ring 2 (6), and water level sensors (15) are fixedly installed at the top of water level ring 1 (5) and water level ring 2 (6). Multiple evenly distributed reinforcing rods (14) are fixedly installed inside water level ring 1 (5) and water level ring 2 (6). The two sets of reinforcing rods (14) are fixedly connected to the movable column (16) and the support column (4) respectively. A monitoring box (9) is fixedly installed on the top of the top plate (7). The monitoring box (9) is connected to the alarm (8), and a storage battery (12) is installed inside the monitoring box (9). A support base (11) is fixedly installed on the top of the monitoring box (9), and a lighting lamp (10) is installed on one side of the support base (11).

5. A method for monitoring the water level in the foundation pit of an underpass tunnel, using a monitoring device for monitoring the water level in the foundation pit of an underpass tunnel as described in any one of claims 1-4, characterized in that, Includes the following steps: S1. Installation preparation: Based on the actual shape and size of the tunnel foundation pit, select a base (1) and a balance plate (3) with appropriate curvature to ensure that the device fits well with the tunnel foundation pit; S2. Base installation: Place the base (1) at the predetermined position in the tunnel pit, so that the arc shape of the base (1) is adapted to the shape of the tunnel pit, and use the balance plates (3) on both sides of the base (1) to ensure the stability of the device. S3. Hold the rotating seat (26) and rotate it around the fixed rod (212) to adjust the angle of the support plate (25), thereby driving the adjustment seat (215) and the positioning seat (24) to move, so that the disassembly plate (217) at the bottom of the mounting plate (23) is aligned with the mounting groove at the top of the base (1). S4. Insert the disassembly plate (217) into the mounting slot, and at the same time control the control sleeve (216) to make the connecting block (221) slide in the moving slot (220), which will drive the abutment block (218) to squeeze the compression spring (219) until the disassembly plate (217) is fully inserted into the mounting slot. At this time, release the control sleeve (216), the compression spring (219) will rebound, and the abutment block (218) will abut the disassembly plate (217), thus completing the initial connection between the support column (4) and the base (1). S5. Insert the insert plate (28) on one side of the mounting base (22) into the insertion hole at the top of the limiting plate (27), and push the sliding plate (29) to slide in the limiting cavity of the limiting base (210) so that the insert plate (28) is fully inserted into the insertion hole and fixed, further strengthening the connection stability between the support column (4) and the base (1). S6. Start the electric push rod (18). The telescopic end of the electric push rod (18) drives the movable column (16) to move up and down in the adjustment cavity of the support column (4), thereby adjusting the height of the top plate (7) and the alarm (8) installed on the top plate (7) to adapt to different monitoring needs. During the adjustment process, the sealing strip (17) between the top of the support column (4) and the movable column (16) is used to prevent dust and water from entering the adjustment cavity. S7. Connect water level ring 1 (5) and water level ring 2 (6) to the movable column (16) and the support column (4) respectively by means of reinforcing rod (14) to ensure that the water level contact strip (13) can contact the water in the tunnel pit; S8. Connect the power supply of the monitoring box (9), start the water level sensor (15), simulate different water level conditions, observe whether the alarm (8) alarms normally, and whether the lighting (10) works normally, to ensure that the entire water level monitoring system operates normally.

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