An inspection system for a diversion tunnel gate slot under moving water operating conditions

Abstract

This invention discloses an inspection system for diversion tunnel gate slots under dynamic water operation conditions. The system includes a hoisting device, a measuring frame, and a measuring device. An inspection slot and a gate well platform are constructed on the diversion tunnel. The inspection slot faces the gate slot and is adapted to the measuring frame. The gate well platform is located above and connected to the inspection slot. The hoisting device is mounted on the gate well platform. The measuring frame is detachably connected to the hoisting device, and the measuring device is fixed to the measuring frame. The hoisting device can lower at least one measuring frame along the inspection slot into the diversion tunnel, or lift a measuring frame located inside the diversion tunnel. This inspection system for diversion tunnel gate slots under dynamic water operation conditions uses a measuring frame instead of an earth-rock cofferdam, reducing workload, eliminating the need for large earthmoving machinery, and allowing inspection without personnel entering the measuring frame. This solves the problems of high construction difficulty, high cost, and high risk associated with existing diversion tunnel gate slot construction.

Description

Technical Field

[0001] This invention belongs to the field of inspection equipment technology, specifically relating to an inspection system for the gate slot of a diversion tunnel under dynamic water operation conditions. Background Technology

[0002] A diversion tunnel is a tunnel used for diverting water during construction. Engineering diversion tunnels have a designed safe operating lifespan; if they exceed this lifespan, significant safety hazards will arise in the tunnel structure. To ensure the safe diversion of water from diversion tunnels that have exceeded their service life, underwater inspection of the entire tunnel section and the portal area is necessary to ensure the integrity of the tunnel structure and thus guarantee the safety of water diversion. Therefore, underwater inspection of the portal area structure is a necessary and significant task.

[0003] In the past, the conventional method for inspecting the operation of the diversion tunnel portal slot of a dam was to seal the tunnel entrance and exit with earth and rock cofferdams and then conduct dry-land testing. This method is based on the premise that the diversion tunnel is usually divided into two sections, and that there are no maintenance gates installed at the inlet sections of the two sections. One diversion tunnel is used for flow, while the inlet and outlet of the other diversion tunnel are blocked by earth and rock cofferdams. During the inspection, it is ensured that the tunnel on that side is dry and free of water to provide dry-land construction conditions. The same method is used to inspect the other section of the tunnel.

[0004] However, in actual construction, the water flow velocity at the diversion tunnel inlet is very fast, and the construction of temporary cofferdams presents certain difficulties in soil extraction, road repair, soil transportation, unloading, and compaction. From an economic and applicability perspective, the cost investment is relatively large. Moreover, the underwater seepage prevention treatment of the upstream earth-rock cofferdam is not ideal, making it difficult to create a dry construction environment. After the cofferdam is used, the above-water part of the cofferdam can be dismantled normally, but the dismantling of the underwater earth-rock cofferdam is not ideal, often causing safety hazards for long tunnel crossings. In addition, the method of filling cofferdams to create dry construction is difficult, time-consuming, and labor-intensive, and both construction personnel and equipment are subject to certain dangers. Summary of the Invention

[0005] The purpose of this invention is to provide an inspection system for diversion tunnel portals under dynamic water operation conditions, which solves the problems of high construction difficulty, high cost and high risk of existing diversion tunnel portal construction.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An inspection system for the portal slot of a diversion tunnel under dynamic water operation conditions includes a hoisting device, a measuring frame, and a measuring device;

[0008] An inspection slot and a gate well platform are provided on the diversion tunnel. The inspection slot is directly opposite the gate slot and is adapted to the measuring frame. The gate well platform is located above the inspection slot and is connected to the inspection slot.

[0009] The hoisting device is set on the gate well platform, the measuring frame is detachably connected to the hoisting device, and the measuring device is fixed on the measuring frame;

[0010] The hoisting device can lower at least one measuring frame into the diversion tunnel along the inspection groove, or lift the measuring frame located in the diversion tunnel.

[0011] In one possible design, the gate well platform is divided into a hoisting platform, a locking platform and a track construction platform from top to bottom. The hoisting device is located on the hoisting platform, the measuring frame is located on the locking platform, and the guide rail is laid down from the track construction platform.

[0012] The locking platform is equipped with a first trough, and the track construction platform is equipped with a second trough. The upper end of the first trough is connected to the hoist platform, and the lower end of the first trough is connected to the second trough.

[0013] The guide rail is located on the side wall of the inspection slot; the first slot and the second slot form a sliding slot for the measuring frame to slide up and down, and the sliding slot is connected to the inspection slot.

[0014] In one possible design, the lower end of the first tank is provided with a placement platform; the lower end of the second tank is provided with a construction platform, and correspondingly, the locking platform and the track construction platform are provided with ladders extending from the hoist platform to the construction platform.

[0015] In one possible design, the measuring frame includes a box beam and a lifting section, wherein the lifting section includes two lifting frames and a lifting frame, the lifting frames are located at both ends of the lifting frame respectively, and the lifting frames are detachably connected to the box beam; the box beam and the lifting frames are each provided with several pulleys.

[0016] In one possible design, the pulley includes rollers and side wheels, wherein several rollers are provided on both sides of the box beam and on both sides of the lifting frame, and several side wheels are also provided on each side of the box beam.

[0017] The rollers are oriented in a first direction, and the side rollers are oriented in a second direction, wherein the first direction is parallel to the width direction of the inspection groove, and the second direction is parallel to the length direction of the inspection groove.

[0018] In one possible design, both the box girder and the lifting frame are set as a frame structure composed of steel pipes and I-beams; the lifting frame includes at least two square frames.

[0019] In one possible design, the measuring device is a three-dimensional fixed-point side-scan sonar, with a water shield on the measuring frame, and the three-dimensional fixed-point side-scan sonar located inside the water shield.

[0020] In one possible design, the lifting equipment includes a gantry, a winch, a power supply structure, and a crane;

[0021] The gantry includes a main beam and a locking beam that can be movably mounted on the main beam. The main beam is equipped with a guide anchor. The wire rope of the winch passes through the guide anchor and connects to the measuring frame. The measuring frame is lowered by moving the locking beam.

[0022] The power supply structure electrically connects the gantry and the winch, and supplies power to the gantry and the winch; the crane is used to lift the measuring frame.

[0023] In one possible design, a pulley system is also provided on the main beam, and a steel wire rope is routed around the pulley system to connect to the measuring frame.

[0024] In one possible design, the inspection system further includes a communication module, a storage module, and a processing module, wherein the communication module is communicatively connected to the measuring device, and the processing module is electrically connected to both the communication module and the storage module.

[0025] Beneficial effects:

[0026] This inspection system for the diversion tunnel portal under dynamic water operation conditions uses a measuring frame dynamic water operation instead of an earth-rock cofferdam, greatly reducing the workload. It eliminates the need for large earthmoving machinery; only the steel structure needs to be prefabricated at the factory and transported to the site, where it is lifted using cranes. Inspection can be carried out without personnel entering the measuring frame. Furthermore, it avoids the impact on the local ecology and water quality caused by constructing a cofferdam.

[0027] Meanwhile, its use is not limited by the operating conditions of the power station, does not require water diversion construction, saves construction time, water resources, and electricity resources, and reduces project costs. In addition, the overall structure is easy to manufacture, install, and use, is reusable, and is economical and reliable. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of an inspection system for a diversion tunnel portal under dynamic water operation conditions.

[0029] Figure 2 This is a structural schematic diagram of a gantry crane.

[0030] Figure 3 This is a schematic diagram of the measuring frame.

[0031] Figure 4 This is a schematic diagram of the front view of a portion of the measurement frame.

[0032] Figure 5 for Figure 4 A magnified schematic diagram of the structure at point A in the middle.

[0033] In the picture:

[0034] 1. Lifting device; 2. Measuring frame; 21. Box girder; 22. Lifting unit; 221. Lifting frame; 222. Lifting frame; 231. Roller; 232. Side wheel; 31. Inspection slot; 32. Hoist platform; 33. Locking platform; 34. Track construction platform; 35. Ladder; 301. Placement platform; 302. Construction platform. Detailed Implementation

[0035] Example:

[0036] like Figure 1-5 As shown, an inspection system for a diversion tunnel gate slot under dynamic water operation conditions includes a hoisting device 1, a measuring frame 2, and a measuring device. An inspection slot 31 and a gate well platform are provided on the diversion tunnel. The inspection slot 31 is directly opposite the gate slot and adapted to the measuring frame 2. The gate well platform is located above the inspection slot 31 and communicates with the inspection slot 31. The hoisting device 1 is set on the gate well platform. The measuring frame 2 is detachably connected to the hoisting device 1, and the measuring device is fixed on the measuring frame 2. The hoisting device 1 can lower at least one measuring frame 2 along the inspection slot 31 into the diversion tunnel, or lift the measuring frame 2 located in the diversion tunnel.

[0037] The structure of the diversion tunnel is improved by opening an inspection slot 31 and a gate well platform. The inspection slot 31 is located above the gate slot of the diversion tunnel so that the measuring frame 2 can descend along the inspection slot 31 to the gate slot of the diversion tunnel. The gate well platform provides both installation space and operation space.

[0038] The hoisting device 1 is installed on the gate well platform and used for the vertical movement of the measuring frame 2. Since the space inside the gate well platform is relatively narrow and limited, the hoisting device 1 must be adapted to the structure and volume of the gate well platform. Using the measuring frame 2 as a platform, the measuring frame 2 can move up and down with the driving force provided by the hoisting device 1. The measuring device is placed on the measuring frame 2 and moves up and down along the inspection groove 31 with the measuring frame 2. When the measuring frame 2 moves down to the diversion tunnel gate groove, the measuring device scans and inspects the gate groove structure, the surrounding concrete damage, the gate groove bottom plate, the gate pier, and other parts. Furthermore, the data measured by the measuring device can be stored and summarized, and handed over to relevant personnel for defect inspection and summarization, forming a database and inspection report, thereby providing scientific guidance for the construction and maintenance of the diversion tunnel.

[0039] During operation, workers operate the equipment on the gate well platform. Measuring frame 2 is placed on the platform and connected to hoisting device 1, while the measuring device is installed on measuring frame 2. Workers use hoisting device 1 to lower measuring frame 2, which passes through inspection slot 31 and moves to the diversion tunnel gate slot. The measuring device then inspects the diversion tunnel gate slot and measures and collects data. After the inspection is complete, workers use hoisting device 1 to lift measuring frame 2 back up. The connection between measuring frame 2 and hoisting device 1 can be maintained as needed for further inspection.

[0040] The inspection system for the diversion tunnel portal under dynamic water operation conditions does not require inspection personnel to go into the water, which can ensure the safety of personnel and equipment. Dynamic water operation is not affected by the power station's operation status or hydrological conditions. The site layout inside the diversion tunnel can be quick and the construction period can be shortened, which greatly reduces the construction difficulty. In addition, all construction personnel operate on land, and construction safety is effectively guaranteed.

[0041] The inspection process is explained below in conjunction with the specific structure of each device:

[0042] In this embodiment, the gate well platform is divided into three layers from top to bottom: a hoisting platform 32, a locking platform 33, and a track construction platform 34. The gate well platform has three distinct functional layers. The uppermost layer is the hoisting platform 32, which is used to house the hoisting device 1, store the measuring frame 2, provide access for workers, and store other equipment. It is evident that the hoisting platform 32 is designed for a large number of people and equipment; therefore, it is crucial to rationally divide the space to maximize space utilization and improve work safety. Below the hoisting platform 32 is the locking platform 33, used to temporarily place the measuring frame 2 and connect it to the hoisting device 1. At the bottom is the track construction platform 34, which has a relatively large space. This provides space for placing equipment, facilitating the opening of the top of the diversion tunnel to allow the measuring frame 2 to enter. Furthermore, it allows for easy guidance of workers during the lowering of the measuring frame 2, ensuring it is quickly aligned and enters the inspection slot 31, thus improving inspection efficiency.

[0043] In one possible implementation, the hoisting device 1 is located on the hoist platform 32, the measuring frame 2 is located on the locking platform 33, and the guide rail is laid downward from the track construction platform 34; the locking platform 33 is provided with a first groove, and the track construction platform 34 is provided with a second groove, the upper end of the first groove is connected to the hoist platform 32, and the lower end of the first groove is connected to the second groove; the guide rail is located on the side wall of the inspection groove 31; the first groove and the second groove form a sliding groove for the measuring frame 2 to slide up and down, and the sliding groove is connected to the inspection groove 31.

[0044] Obviously, the relatively large weight of the measuring frame 2 is beneficial for maintaining stability under dynamic water conditions. However, this also means that the measuring frame 2 is only connected to the hoisting device 1 during the inspection process to protect the hoisting device 1 and ensure operational safety. Therefore, when the measuring frame 2 is connected to the hoisting device 1, at least part of the measuring frame 2 must be placed inside the locking platform 33, that is, the first groove. Optionally, the first groove is provided with a protrusion for placing the measuring frame 2, thereby facilitating the placement of the measuring frame 2.

[0045] The width of the sliding groove, namely the first groove and the second groove, is greater than the width of the measuring frame 2. Therefore, the frictional resistance experienced by the measuring frame 2 when sliding up and down along the sliding groove is small, so a guide rail is not required. However, the width of the inspection groove 31 is smaller, and the frictional resistance experienced by the measuring frame 2 when sliding up and down along the inspection groove 31 is larger. Therefore, a guide rail is required to improve the service life of the measuring frame 2.

[0046] Meanwhile, when the measuring frame 2 slides in the sliding groove, it may shake due to various reasons. At least at the junction of the second groove and the inspection groove 31, the measuring frame 2 may come into contact with the bottom of the second groove, and the measuring frame 2 cannot accurately enter the inspection groove 31. Therefore, at least at the second groove, that is, at the track construction platform 34, several workers can be arranged to guide the work.

[0047] Optionally, the first groove body is also provided with a secondary protrusion located on the opposite side of the protrusion. That is, after the measuring frame 2 is separated from the protrusion, it will sway left and right. At this time, a worker and / or corresponding equipment can be set on the secondary protrusion to make the measuring frame 2 quickly stabilize.

[0048] Optionally, the lower end of the first tank is provided with a placement platform 301; the lower end of the second tank is provided with a construction platform 302. The placement platform 301 is the aforementioned protrusion, and the construction platform 302 is the bottom of the second tank, which is the junction of the second tank and the inspection tank 31. The functions and roles of the two have been explained and will not be repeated here.

[0049] Accordingly, the locking platform 33 and the track construction platform 34 are equipped with ladders 35 extending from the self-starting hoist platform 32 to the construction platform 302. Alternatively, an elevator can be used instead of ladders 35, which can be selected according to the actual construction conditions.

[0050] In this embodiment, the measuring frame 2 includes a box beam 21 and a lifting part 22. The lifting part 22 includes two lifting frames 221 and a lifting frame 222. The lifting frames 221 are located at both ends of the lifting frame 222, and the lifting frames 221 are detachably connected to the box beam 21. The box beam 21 and the lifting frames 221 are each provided with a number of pulleys.

[0051] The measuring frame 2 is designed as a statically indeterminate truss structure, and its structural strength has been fully guaranteed through hydraulic calculations and stress verification to ensure its use under dynamic water conditions. Furthermore, the measuring frame 2 comprises two parts: a box girder 21 and a lifting section 22, which improves transport performance (see [reference]). Figure 3 The measuring frame 2 is U-shaped, and the disassembled box beam 21 and lifting part 22 are both cuboids, with more regular shapes, which is conducive to storage and placement, and transportation is also more convenient. On the other hand, it realizes modular design, which effectively reduces the cost of use.

[0052] Therefore, when the measuring frame 2 is placed on the locking platform 33, two operations are required: the lower end of the lifting part 22 is connected to the box beam 21, and the upper end of the lifting part 22 is connected to the hoisting device 1. Specifically, the lifting frame 221 is used to connect the box beam 21, and the lifting frame 222 is used to connect the hoisting device 1. Optionally, any suitable detachable connection method can be used to achieve the connection.

[0053] A practical connection scheme is presented here. The lower end of the lifting frame 221 has several rows of first screw holes, with a certain number of holes in each row. Correspondingly, the upper end of the box girder 21 has second screw holes adapted to the first screw holes. The lifting frame 221 is lowered so that the first and second screw holes are coaxial, and the first and second screw holes are arranged in a one-to-one correspondence, thus achieving connection through bolts or screws. Simultaneously, the hoisting device 1 includes a wire rope, which is lowered and wound around the lifting frame 222, thus connecting the hoisting device 1 to the lifting frame 222.

[0054] In addition, the pulley is adapted to the guide rail, so that when the measuring frame 2 slides up and down, the pulley effectively reduces the frictional resistance experienced by the measuring frame 2.

[0055] In one possible implementation, the pulley includes rollers 231 and side wheels 232. Several rollers 231 are provided on both sides of the box beam 21 and on both sides of the lifting frame 221, and several side wheels 232 are also provided on each side of the box beam 21. The rollers 231 are arranged facing a first direction, and the side wheels 232 are arranged facing a second direction. The first direction is parallel to the width direction of the inspection groove, and the second direction is parallel to the length direction of the inspection groove.

[0056] The pulleys are divided into two types: rollers 231 and side wheels 232. Rollers 231 are adapted to the guide rail to reduce the frictional resistance experienced by the lifting frame 222 during lifting and lowering, thus protecting the lifting frame 222 and reducing the difficulty of lifting and lowering. It is easy to understand that the rollers 231 on the box beam 21 and the rollers 231 on the lifting frame 221 must be correspondingly positioned to connect to the guide rail in order to connect them.

[0057] The side wheel 232 can be fixed to the box beam 21 by welding and serves as a limit. That is, when the measuring frame 2 is working, the flow channel is under dynamic water conditions and the measuring frame 2 is constantly impacted by the water flow. The measuring frame 2 can move freely along the length of the inspection groove 31. However, when the end of the measuring frame 2 moves to the outside of the inspection groove 31, that is, when the end of the measuring frame 2 moves into the flow channel, the measuring frame 2 will tilt under the impact of the water flow. As a result, the measuring frame 2 cannot complete the detection work normally and it is difficult to retrieve the measuring frame 2.

[0058] Therefore, by using the side wheel 232 to restrict the movement of the measuring frame 2 along the length direction of the inspection groove 31, on the one hand, the measuring frame 2 has a certain degree of freedom and can move a certain distance, and on the other hand, it avoids the end of the measuring frame 2 from moving outward into the guide hole.

[0059] Optionally, both the box girder 21 and the lifting frame 221 are configured as a frame structure composed of steel pipes and I-beams; it is readily understood that the frame structure can be constructed in any suitable shape and structure, and the present invention does not impose any restrictions on this.

[0060] Optionally, the lifting frame 222 includes at least two square frames. The specific number of square frames can be increased or decreased as needed based on actual usage.

[0061] In this embodiment, a three-dimensional fixed-point side-scan sonar is selected as the measuring device. A water shield is provided on the measuring frame 2, and the three-dimensional fixed-point side-scan sonar is located inside the water shield.

[0062] During water flow operations, the diversion tunnel is characterized by high flow velocity and poor flow conditions. Under the impact of the water flow, the measuring device is in an unstable state. The measuring device can only guarantee the validity and accuracy of the detection data when it is in a stable state. Therefore, a water-blocking cover is installed on the measuring frame 2. The measuring device is placed inside the water-blocking cover and connected to the measuring frame 2. This not only blocks the direct impact of the water flow on the measuring device, reducing the impact on the device and minimizing the possibility of it being washed away, thus effectively improving the service life of the measuring device, but also stabilizes the water flow, keeping the measuring device in a relatively stable state and improving the measurement effect.

[0063] Meanwhile, the volume covered by the water shield can be larger than the volume of the measuring device, and space is reserved inside the water shield for the measuring device to rotate. The measuring device can then rotate in multiple positions during the inspection process, enabling multi-position inspection, providing more inspection data, and helping to improve the accuracy of the inspection results.

[0064] It is easy to understand that the measuring device can be set at any suitable position on the measuring frame 2, and can be selected according to the actual inspection conditions. Preferably, the measuring device is installed on the bottom surface of the box beam 21 to reduce the influence of the measuring frame 2 on the scanning range of the measuring device. Correspondingly, a water shield is set at the corresponding position of the measuring frame 2, and the water shield can be constructed into any suitable shape.

[0065] Optionally, the BV-5000 model of three-dimensional fixed-point side-scan sonar is selected. The BV-5000 can detect and record, collecting a variety of data that can be cross-referenced to improve the accuracy of the inspection. In addition, the measuring device includes, but is not limited to, the three-dimensional fixed-point side-scan sonar, or any other suitable equipment can be selected.

[0066] In this embodiment, the hoisting device 1 includes a gantry frame, a winch, a power supply structure, and a crane; the gantry frame includes a main beam and a locking beam movably mounted on the main beam, and a guide anchor is provided on the main beam. The wire rope of the winch passes through the guide anchor and connects to the measuring frame 2. The locking beam is moved to lower the measuring frame 2; the power supply structure is electrically connected to the gantry frame and the winch, and supplies power to the gantry frame and the winch; the crane is used to hoist the measuring frame 2.

[0067] Given the limited space on the hoist platform 32, both the gantry and the winch were chosen to be relatively small. Furthermore, considering the frictional resistance from the guide rails on the measuring frame 2 after it enters the water, a pulley system was designed at the wire rope for construction. This system supports the load exerted by the frictional resistance on the wire rope and also facilitates the hoisting of the measuring frame 2 in confined spaces.

[0068] When lowering the measuring frame 2, after the measuring frame 2 is assembled on the locking platform 33, it is lifted by a winch and moved to the outside of the placement platform 301, so that the measuring frame 2 is in a movable state. The measuring frame 2 is lowered at a uniform speed by moving the locking beam. After the measuring frame 2 moves to the construction platform 302, a worker guides the measuring frame 2 to slide and connect it to the guide rail, so that the measuring frame 2 moves down along the inspection groove 31 into the diversion tunnel door groove.

[0069] Furthermore, it is readily understood that any suitable commercially available model of crane can be used. And the power supply structure can be any suitable method; this invention does not impose any limitations in this regard.

[0070] In this embodiment, the inspection system further includes a communication module, a storage module, and a processing module. The communication module is communicatively connected to the measuring device, and the processing module is electrically connected to both the communication module and the storage module. Specifically, the storage module stores the data measured by the measuring device. The communication module can be used for data transmission and to relay instructions issued by the operator during the inspection process. The processing module can be any suitable commercially available processor.

[0071] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An inspection system for the portal slot of a diversion tunnel under dynamic water operation conditions, characterized in that, It includes a hoisting device (1), a measuring frame (2), and a measuring device; An inspection slot (31) and a gate well platform are provided on the diversion tunnel. The inspection slot (31) is directly opposite the gate slot and is adapted to the measuring frame (2). The gate well platform is located above the inspection slot (31) and is connected to the inspection slot (31). The hoisting device (1) is set on the gate well platform, and the measuring frame (2) is detachably connected to the hoisting device (1). The measuring device is fixed on the measuring frame (2). The hoisting device (1) can lower at least one measuring frame (2) into the diversion hole along the inspection groove (31), or lift the measuring frame (2) located in the diversion hole. The gate well platform is divided into a hoisting platform (32), a locking platform (33) and a track construction platform (34) from top to bottom. The hoisting device (1) is located on the hoisting platform (32), the measuring frame (2) is located on the locking platform (33), and the guide rail is laid down from the track construction platform (34). The locking platform (33) is provided with a first trough, and the track construction platform (34) is provided with a second trough. The upper end of the first trough is connected to the hoist platform (32), and the lower end of the first trough is connected to the second trough. The guide rail is located on the side wall of the inspection groove (31); the first groove and the second groove form a sliding groove for the measuring frame (2) to slide up and down, and the sliding groove is connected to the inspection groove (31).

2. The inspection system for the diversion tunnel portal under dynamic water operation conditions according to claim 1, characterized in that, The lower end of the first tank is provided with a placement platform (301); the lower end of the second tank is provided with a construction platform (302). Correspondingly, the locking platform (33) and the track construction platform (34) are provided with ladders (35) extending from the self-starting hoist platform (32) to the construction platform (302).

3. The inspection system for the diversion tunnel portal under dynamic water operation conditions according to claim 1, characterized in that, The measuring frame (2) includes a box beam (21) and a lifting part (22). The lifting part (22) includes two lifting frames (221) and a lifting frame (222). The lifting frames (221) are located at both ends of the lifting frame (222) and the lifting frames (221) are detachably connected to the box beam (21). The box beam (21) and the lifting frames (221) are each provided with several pulleys.

4. The inspection system for the diversion tunnel portal under dynamic water operation conditions according to claim 3, characterized in that, The pulley includes rollers (231) and side wheels (232). Several rollers (231) are provided on both sides of the box beam (21) and on both sides of the lifting frame (221). Several side wheels (232) are also provided on both sides of the box beam (21). The roller (231) is set in a first direction, and the side roller (232) is set in a second direction, wherein the first direction is parallel to the width direction of the inspection groove, and the second direction is parallel to the length direction of the inspection groove.

5. The inspection system for the diversion tunnel portal groove under dynamic water operation conditions according to claim 3, characterized in that, Both the box girder (21) and the lifting frame (221) are set as frame structures composed of steel pipes and I-beams; the lifting frame (222) includes at least two square frames.

6. The inspection system for the diversion tunnel portal under dynamic water operation conditions according to claim 1, characterized in that, The measuring device is a three-dimensional fixed-point side-scan sonar. A water shield is provided on the measuring frame (2), and the three-dimensional fixed-point side-scan sonar is located inside the water shield.

7. The inspection system for the diversion tunnel portal under dynamic water operation conditions according to claim 1, characterized in that, The hoisting equipment (1) includes a gantry crane, a winch, a power supply structure, and a crane; The gantry includes a main beam and a locking beam that can be moved and set on the main beam. The main beam is equipped with a guide anchor. The wire rope of the winch passes through the guide anchor and connects to the measuring frame (2). The measuring frame (2) is lowered by the moving locking beam. The power supply structure is electrically connected to the gantry and the winch, and supplies power to the gantry and the winch; the crane is used to lift the measuring frame (2).

8. The inspection system for the diversion tunnel portal under dynamic water operation conditions according to claim 7, characterized in that, The main beam is also equipped with a pulley system, and the steel wire rope passes around the pulley system to connect to the measuring frame (2).

9. The inspection system for the diversion tunnel portal under dynamic water operation conditions according to claim 1, characterized in that, The inspection system further includes a communication module, a storage module, and a processing module. The communication module is connected to the measuring device, and the processing module is electrically connected to both the communication module and the storage module.

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