Air bag sealing structure of tidal zone water passing culvert and implementation method thereof

Abstract

The application relates to a gas bag blocking structure of a water passing culvert in a tidal area and an implementation method thereof, which comprises an inflation gas bag structure, inflation equipment, a culvert mouth protection structure and a traction fixing structure; the inflation gas bag structure is arranged in the water passing culvert and comprises an inflation gas bag and first and second plugs arranged at two ends of the inflation gas bag; the second plug is provided with an inflation hose which is used for connecting the inflation equipment; the two ends of the inflation gas bag structure are connected to the traction fixing structure respectively, and the traction fixing structure is connected to the culvert mouth protection structure; the culvert mouth protection structure is arranged at the two ends of the water passing culvert and is used for intercepting water garbage and marine organisms from entering the water passing culvert; the application has the advantages that the inflation gas bag structure, the culvert mouth protection structure and the traction fixing structure can not only realize the rapid blocking of the water passing culvert in the tidal area, but also realize the functions of bearing bidirectional water head pressure and repeated opening and closing.

Description

Technical Field

[0001] This invention belongs to the field of water conservancy and waterway engineering technology, and relates to the airbag sealing structure and its implementation method for tidal culverts. Background Technology

[0002] For near-shore water conservancy and waterway projects, temporary internal water systems are often formed within the project area. To maintain the ecology of these internal water systems, they need to be connected to the open sea to ensure water circulation. However, if the internal water system is polluted due to construction or other reasons, the connecting channels should be closed immediately to prevent pollutants from leaking into the open sea and affecting the marine ecosystem. The channels should be reopened after the pollutants have been disposed of to maintain water circulation. Due to their good economic efficiency and applicability, culverts are commonly used as water system connecting channels in engineering projects.

[0003] The culverts located in tidal zones are affected by tidal rise and fall. During the culvert closure period, they need to withstand bidirectional water head. Considering the diffusion efficiency of pollutants in the water, the culvert closure structure needs to have functions such as bearing bidirectional water head, rapid closure, and repeated opening and closing. Conventional engineering techniques such as steel flap gates and bagged soil closures cannot meet the above requirements.

[0004] Currently, airbag-sealed pipelines are widely used, mainly in the fields of municipal pipeline repair and pipeline inspection. They are used to temporarily seal the upstream and downstream ports of the pipeline being repaired or inspected, in order to form a relatively closed dry work area.

[0005] Airbag-sealed pipelines are currently rarely used in water conservancy and waterway engineering. Their sealing structures, particularly those installed in tidal culverts, must be able to withstand bidirectional water head, repeated opening and closing, and rapid sealing. Therefore, compared to existing airbag-sealing technologies, their application scenarios and functional requirements have changed significantly, necessitating targeted improvements and optimizations. Summary of the Invention

[0006] The purpose of this invention is to solve the above-mentioned problems existing in the prior art and to provide an airbag sealing structure for tidal culverts and its implementation method.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] An airbag sealing structure for a tidal culvert includes a dike structure and a culvert installed within the dike structure. It also includes an inflatable airbag structure, an inflation device, a culvert opening protection structure, and a traction and fixing structure. The inflatable airbag structure is installed inside the culvert and includes an inflatable airbag and a first plug and a second plug fixedly installed at both ends of the inflatable airbag. An inflation hose is provided on the second plug, and the inflation hose is used to connect to the inflation device.

[0009] Both the first plug and the second plug are fixedly provided with pull rings. The pull rings are connected to one end of the traction fixing structure, and the other end of the traction fixing structure is connected to the culvert opening protection structure. The pull rings are used to fix the inflatable airbag in the culvert by traction. The culvert opening protection structure is set at both ends of the culvert to intercept garbage and marine life in the water from entering the culvert.

[0010] Preferably, a protective steel pipe is fixedly installed on the side slope of the embankment structure, wherein one end of the inflatable hose is connected to the second plug on the inflatable airbag, and the other end passes through the protective steel pipe and is connected to the inflation device.

[0011] Preferably, the second plug is provided with an air inlet, one end of which is connected to the inflatable airbag, and the other end is also connected to the inflatable hose.

[0012] Preferably, the inflation hose is equipped with a pressure gauge, a check valve, and a gas pressure reducing valve at one end near the inflation device; wherein, the pressure gauge is used to monitor the pressure inside the inflation bladder structure in real time; the check valve is used to open and close the connection between the inflation bladder structure and the outside world to maintain the pressure inside the inflation bladder structure; and the gas pressure reducing valve is used to control the pressure inside the inflation bladder structure to be lower than the maximum working pressure to ensure inflation safety.

[0013] Preferably, the traction fixing structure consists of a traction rope and hanging rings at both ends of the traction rope; the hanging rings are used to connect the pull rings; the two ends of the traction rope are respectively connected to an inflatable airbag and a culvert opening protection structure.

[0014] Preferably, the length of the traction rope should be the length from the end of the inflatable airbag structure to the adjacent side opening of the culvert, plus a margin of safety.

[0015] Preferably, the "excess length" is 1-2 times the diameter of the culvert.

[0016] Preferably, the culvert inlet protection structure consists of a perforated grating, a connecting ring, a connecting plate, and a fixing structure; wherein, the connecting ring is fixedly disposed at the lower end of the perforated grating; one end of the connecting plate is fixedly connected to the top end of the perforated grating, and the other end is connected to the fixing structure via a rotating shaft; wherein, the fixing structure is fixedly connected to the inlet of the culvert.

[0017] Preferably, the connecting ring is connected to one end of the hanging ring on the traction fixing structure, and the porous grid plate is rotated around the rotating shaft on the fixing structure by lifting the other end of the traction fixing structure, so as to realize the opening or closing of the culvert opening protection structure for the culvert opening.

[0018] Another objective of this invention is to provide a method for airbag sealing of tidal culverts.

[0019] To achieve the second objective mentioned above, the technical solution adopted by the present invention is as follows:

[0020] A method for airbag sealing of a tidal culvert, the method comprising the following steps:

[0021] S1: Preparations before sealing: Determine the specifications of the inflatable airbag according to the inner diameter of the culvert and the maximum tidal range of the sea area, check the airtightness of the inflatable airbag, clean up the garbage, attached marine organisms and protrusions on the inner wall of the culvert, and ensure that the inner wall of the culvert is clean.

[0022] S2: Install protective structures: During low tide, install protective structures at both ends of the culvert and keep the protective structures at the culvert openings open. Install protective steel pipes on the side of the dike.

[0023] S3: Inflatable airbag accessory connection: The two ends of the inflatable airbag are connected to the traction fixing structure, the inflation hose is inserted into the protective steel pipe, one end of the inflation hose is connected to the air inlet of the inflatable airbag, and the other end is connected to the pressure gauge, the air stop valve and the gas pressure reducing valve, and connected to the inflation equipment.

[0024] S4: Inflatable airbag into the culvert: During low tide, place the connected inflatable airbag and its accessories into the designed position inside the culvert, connect the traction and fixing structures at both ends of the inflatable airbag to the culvert opening protection structure, and close the culvert opening protection structure.

[0025] S5: Water culvert sealing process: Keep the air stop valve open, turn on the inflation device and provide positive pressure until the pressure inside the airbag reaches the working pressure. The pressure inside the airbag can be maintained in the following two ways: First, close the air stop valve to maintain the pressure inside the inflated airbag and pay attention to the pressure gauge. When the pressure inside the airbag drops to the lower limit of the working pressure, open the air stop valve and replenish air through the inflation device; Second, keep the air stop valve open, and the inflation device continues to inflate. The pressure inside the airbag is maintained within the working pressure range through the gas pressure reducing valve.

[0026] S6: Water culvert connection process: Keep the air stop valve open, turn on the inflation equipment and provide negative pressure until the gas in the airbag is completely discharged to the negative pressure state, close the air stop valve, and maintain the small volume state of the inflated airbag under negative pressure.

[0027] S7: Replacement of Damaged Parts: During low tide, open the protective structures at both ends of the culvert, disconnect the airbag fixing structure from the culvert opening protective structure, remove the inflatable airbag and accessories from the culvert, replace the damaged parts and reinstall them into the culvert, and close the culvert opening protective structure.

[0028] Due to the adoption of the above technical solution, the beneficial effects obtained by the present invention include:

[0029] This invention has a simple structure and is easy to operate. Through the setting of an inflatable airbag structure, a culvert opening protection structure and a traction fixing structure, it can not only achieve rapid sealing of culverts in tidal areas, but also bear bidirectional water head pressure and perform repeated opening and closing functions. Attached Figure Description

[0030] Figure 1 This is a three-dimensional state diagram of the airbag sealing structure for a tidal culvert of the present invention during use.

[0031] Figure 2 This is a cross-sectional schematic diagram of the airbag sealing structure for a tidal culvert of the present invention in use.

[0032] Figure 3 This is a schematic diagram showing the connection between the inflatable airbag structure, the inflatable hose, and the accessories in this invention.

[0033] Figure 4 This is a schematic diagram showing the connection between the inflatable airbag structure and the traction fixing structure in this invention.

[0034] Figure 5 This is a schematic diagram of the culvert opening protection structure in this invention.

[0035] Figure 6 This is a schematic diagram showing the connection between the dual-inflatable airbag structure and the traction fixation structure in this invention.

[0036] The attached figures are labeled as follows:

[0037] 1. Culvert; 2. Embankment structure; 3. Inflatable airbag structure; 31. Inflatable airbag; 32. First plug; 33. Second plug; 4. Culvert opening protection structure; 41. Perforated grating plate; 42. Connecting ring; 43. Connecting plate; 44. Fixing structure; 5. Traction fixing structure; 51. Connecting rope; 52. Hanging ring; 6. Inflatable hose; 61. Pressure gauge; 62. Connector; 63. Air stop valve; 64. Gas pressure reducing valve; 7. Protective steel pipe; 8. Inflating equipment. Detailed Implementation

[0038] Please see Figure 1 , Figure 2 As shown, this embodiment of the invention discloses an airbag sealing structure for a tidal culvert, including a dike structure and a culvert installed in the dike structure. The airbag sealing structure also includes an inflatable airbag structure 3, a culvert opening protection structure 4, a traction fixing structure 5, an inflatable hose 6, a protective steel pipe 7, and an inflation device 8.

[0039] The inflatable airbag structure 3 is set at a predetermined position inside the culvert 1; the culvert opening protection structure 4 is fixedly installed on the openings at both ends of the culvert 1 to intercept garbage and marine life in the water from entering the culvert; the protective steel pipe 7 is fixedly installed on the slope of the side of the dike structure 2, with its top extending to the top of the dike and its bottom extending to the middle of the culvert. The inflatable hose is led out from the culvert, runs through the protective steel pipe and extends to the top of the dike. The protective steel pipe can protect the inflatable hose 6 exposed on the side of the dike, slow down the aging of the inflatable hose caused by sunlight, and prevent the inflatable hose from being damaged by external forces.

[0040] In this embodiment, both ends of the inflatable airbag structure 3 are detachably connected to one end of the traction fixing structure 5, and the other end of the traction fixing structure 5 is also detachably connected to the culvert opening protection structure 4. Through the above measures, the inflatable airbag structure 3 is fixed in a predetermined position within the culvert 1, and tension is provided to both ends of the inflatable airbag structure 3 to withstand the bidirectional water pressure or bidirectional water flow force generated by tidal rise and fall. One end of the inflation hose 6 is connected to the air inlet of the inflatable airbag structure 3, and the other end passes through the protective steel pipe 7 and is connected to the inflation device 8.

[0041] The process of sealing the culvert: The inflation device 8 provides positive pressure to the inflatable airbag structure 3 until the inflatable airbag structure 3 reaches the working pressure and completely seals the culvert 1, maintaining the gas pressure inside the inflatable airbag structure 3 within the working pressure range.

[0042] The process of connecting the water culvert: the inflation device 8 provides negative pressure to the inflatable airbag structure 3 until the gas inside the inflatable airbag structure 3 is emptied and the negative pressure state is maintained, thus maintaining the reduced volume of the inflatable airbag structure 3.

[0043] By adopting the above technical solutions, it is possible to conveniently and quickly block or connect water culverts.

[0044] Please see Figure 3 The inflation hose 6 is equipped with a pressure gauge 61, a stop valve 63, and a gas pressure reducing valve 64 at one end near the inflation device 8. The pressure gauge 61 is used to monitor the pressure inside the inflation bladder structure 3 in real time. The stop valve 63 can be opened or closed to control the connection or closure of the inflation hose. The gas pressure reducing valve 64 is used to control the pressure inside the inflation hose.

[0045] Specifically: pressure gauge 61 can monitor the pressure value inside the inflatable airbag 31 in real time. When the pressure of the inflatable airbag 21 is lower than the working pressure, it can replenish the air in time; the air stop valve 63 closes when the airbag is fully inflated and fully deflated to maintain the pressure inside the airbag and keep the airbag in a swollen or compressed state; the gas pressure reducing valve is used to limit the maximum pressure inside the inflatable airbag. When the pressure exceeds the design threshold, the gas pressure reducing valve starts to release gas and reduce pressure to prevent the inflatable airbag from bursting and ensure construction safety.

[0046] Please see Figure 4 The inflatable airbag structure 3 has two detachable ends that can be connected to the traction and fixing structure 5. The inflatable airbag structure 3 consists of an inflatable airbag 31 and a first plug 32 and a second plug 33 located at both ends. The second plug has an air inlet (not explicitly shown in the figure for simplicity), one end of which is connected to the inflatable airbag, and the other end is connected to the inflation hose. The traction and fixing structure 5 consists of a traction rope 51 and hanging rings 52 (with opening and closing functions) located at both ends of the traction rope. Pull rings should be provided on the first plug 32 and the second plug 33 for connecting the hanging rings 52. The hanging rings 52 should have convenient opening and closing functions to facilitate the connection and disassembly of the components. By adopting the above technical solution, the traction and fixing structure can fix the inflatable airbag by connecting the pull rings on the first and second plugs, and provide tension to the inflatable airbag to maintain its stability.

[0047] Furthermore, the traction rope 51 should have sufficient strength and toughness, and the length of a single traction rope 51 is the distance from the end of the inflatable airbag 31 to the culvert opening protection structure 4 plus a margin; and this "margin" is 1 to 2 times the diameter of the culvert.

[0048] In addition, the regular rise and fall of the tides in the open sea will create a bidirectional water head between the internal water system and the open sea. In the blocked state, the inflatable airbag 31 needs to bear the bidirectional water pressure, and in the connected state, the inflatable airbag 31 needs to bear the bidirectional water flow force. The traction fixing structure 5 set at both ends of the inflatable airbag 31 can provide tension for the inflatable airbag to bear the bidirectional water flow force and bidirectional water pressure. Specifically, one end of the traction fixing structure 5 is connected to the inflatable airbag, and the other end is connected to the culvert opening protection structure, so that the tension provided by the inflatable airbag 31 is transferred to the culvert opening protection structure. The culvert opening protection structure 4 is fixedly connected to the culvert opening to bear the tension transmitted from the traction fixing structure 5.

[0049] In this embodiment, the inflation device 8 should have the function of outputting positive pressure and negative pressure; and during the process of sealing the culvert, the inflation device 8 outputs positive pressure gas, so that the inflatable airbag reaches the working pressure and seals the culvert; during the process of connecting the culvert, the inflation device 8 outputs negative pressure, empties the gas in the inflatable airbag and maintains a certain negative pressure, so that the inflatable airbag 31 is kept in a compressed state, reducing the water resistance rate of the inflatable airbag.

[0050] Please see Figure 5 The culvert opening protection structure 4 consists of a perforated grating plate 41, a connecting ring 42, a connecting plate 43, and a fixing structure 44. The connecting ring 42 is fixedly installed at the lower end of the perforated grating plate 41. One end of the connecting plate 43 is fixedly connected to the top end of the perforated grating plate 41, and the other end is connected to the fixing structure 44 through a rotating shaft. The fixing structure 44 is fixedly connected to the opening of the culvert 1.

[0051] In this embodiment, the connecting ring 42 is connected to one end of the hanging ring on the traction fixing structure, and the porous grid plate 41 is rotated around the rotating shaft on the fixing structure 44 by lifting the other end of the traction fixing structure 5, so as to realize the opening or closing of the culvert opening protection structure 4 to the culvert 1 opening.

[0052] In this embodiment, the culvert opening protection structure 5 should have high water permeability and good interception performance, and a porous grid structure can be adopted.

[0053] As a preferred option, the culvert opening protection structure 4 should have an opening and closing function. During the operation of the structure, the culvert opening protection structure should remain closed, and during structural maintenance or component replacement, the culvert opening protection structure should remain open.

[0054] Furthermore, the porous grid structure should provide connection points for the inflatable airbag fixing structure, and the grid holes at the connection points should be reinforced.

[0055] The above technical solution can ensure that while water is flowing through, garbage and attached marine organisms are prevented from entering the water passage culvert, thus avoiding damage to the inflatable airbag and affecting the watertightness of the airbag seal, and ensuring the reliability of the sealing structure.

[0056] Please see Figure 6 To improve the reliability of the airbag sealing structure of the culvert, a double inflatable airbag can be installed inside the culvert 1. The double inflatable airbag adopts the component connection method of "traction fixing structure 5 + inflatable airbag structure 3 + traction fixing structure 5 + inflatable airbag structure 3 + traction fixing structure 5". It should be ensured that the end of the inflatable airbag structure 3 with the inflation port plug 33 faces the direction of the pipe opening adjacent to the culvert 1, so as to ensure that the inflation hose 6 and the inflatable airbag 31 do not cross.

[0057] It should be noted that the present invention has a simple structure and is easy to operate. It can not only achieve rapid sealing of tidal culverts, but also bear bidirectional water head pressure and perform repeated opening and closing. In addition, the materials used in the airbag sealing structure in this embodiment are all located in seawater or in areas where the seawater level fluctuates, and the materials used in the structure should also be designed with anti-corrosion measures to be added within the design service life.

[0058] Example 2

[0059] See you again Figure 1 , Figure 2 As shown, the present invention also proposes a method for airbag sealing of tidal culverts, comprising the following steps:

[0060] S1: Preparations before sealing: Determine the specifications of the inflatable airbag structure 3 based on the inner diameter of the culvert 1 and the maximum tidal range of the sea area; check the airtightness of the inflatable airbag structure 3 to ensure good airtightness and a clean surface. During low tide, conduct underwater operations to clean up garbage, attached marine organisms, protruding burrs, stones, and other sharp objects inside the culvert 1 to ensure cleanliness inside the culvert 1.

[0061] S2: Install protective structures: During low tide, install protective structures 4 at both ends of the culvert 1 and protective steel pipes 7 on the side slopes of the dike structure 2.

[0062] S3: Connection and Leakage Inspection of Inflatable Airbag Structure Components: Connect one end of the inflation hose 6 to the inflatable airbag structure 3, and the other end to the pressure gauge 61, check valve 63, and gas pressure reducing valve 64. Inflate the inflatable airbag structure 3 using the inflation device 8 until it reaches its maximum working pressure. Close the check valve 63. Apply soapy water evenly to the surface of the inflatable airbag structure 3 and the connection points of its components, and check for leaks. If no leaks are found, remove the pressure gauge 61, check valve 63, and gas pressure reducing valve 64. Connect the traction fixing structure 5 to both ends of the inflatable airbag structure 3, ensuring that the length of the traction rope 51 meets the requirements.

[0063] S4: Inflatable airbag structure 3 enters culvert 1: During low tide, underwater operation is carried out, keeping the culvert opening protection structure 4 open, inflatable airbag structure 3 and connector 62 are placed into culvert 1, the traction and fixing structures 5 at both ends of inflatable airbag structure 3 are connected to culvert opening protection structure 4, the inflation hose 6 is passed out from the protective steel pipe 7, and pressure gauge 61, air stop valve 63, gas pressure reducing valve 64 and inflation equipment 8 are connected, and culvert opening protection structure 4 is closed.

[0064] S5: Culvert sealing process: Ensure the air stop valve 63 is open, start the inflation device 8 and maintain positive pressure until the maximum working pressure is reached inside the inflation bag 31. The pressure inside the inflation bag 31 can be maintained in the following two ways: First, close the air stop valve 63 and pay attention to the pressure gauge 61. When the pressure inside the inflation bag 31 drops to the lower limit of the working pressure, open the air stop valve 63 and replenish air through the inflation device 8 to the maximum working pressure; Second, keep the air stop valve 63 open, and the inflation device 8 continues to inflate. The pressure inside the inflation bag 31 is maintained within the working pressure range through the gas pressure reducing valve 64.

[0065] S6: Water culvert connection process: Ensure that the air stop valve 63 is open, start the inflation device 8 and maintain negative pressure until the gas in the inflation bag 31 is completely discharged to the negative pressure state, close the air stop valve 63 to maintain the small volume state of the inflation bag 31 under negative pressure.

[0066] S7: Replacement of damaged parts: During low tide, underwater operations are carried out to open the culvert opening protection structure 4 at both ends of the culvert 1, disconnect the traction fixing structure 5 from the culvert opening protection structure 4, remove the parts from the culvert, replace the damaged parts and reinstall them into the culvert 1, and close the culvert opening protection structure 4.

[0067] The foregoing descriptions and embodiments are provided to enable those skilled in the art to understand and apply the present invention. It will be apparent to those skilled in the art that various modifications can be easily made to these contents, and the general principles described herein can be applied to other embodiments without creative effort. Therefore, the present invention is not limited to the foregoing descriptions and embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from its scope should be within the protection scope of the present invention.

Claims

1. An airbag sealing structure for a tidal culvert, comprising a dike structure and a culvert disposed within the dike structure, characterized in that, It also includes inflatable airbag structures, inflation equipment, culvert opening protection structures, and traction fixing structures; The inflatable airbag structure is installed inside the water passage pipe. The inflatable airbag structure includes an inflatable airbag and a first plug and a second plug that are respectively fixed at both ends of the inflatable airbag. The second plug is provided with an inflation hose, which is used to connect to the inflation device. Both the first plug and the second plug are fixedly provided with pull rings. The pull rings are connected to one end of the traction fixing structure, and the other end of the traction fixing structure is connected to the culvert opening protection structure, which is used to fix the inflatable airbag in the culvert by traction. The culvert opening protection structure is installed at both ends of the culvert to prevent garbage and marine life from entering the culvert. The culvert inlet protection structure consists of a perforated grating, a connecting ring, a connecting plate, and a fixing structure; wherein, the connecting ring is fixedly installed at the lower end of the perforated grating; one end of the connecting plate is fixedly connected to the top end of the perforated grating, and the other end is connected to the fixing structure via a rotating shaft; wherein, the fixing structure is fixedly connected to the inlet of the culvert; the traction fixing structure consists of a traction rope and hanging rings installed at both ends of the traction rope; The connecting ring is connected to one end of the hanging ring on the traction fixing structure, and the porous grid plate is rotated around the rotating shaft on the fixing structure by lifting the other end of the traction fixing structure, so as to realize the opening or closing of the culvert opening protection structure for the water-passing culvert opening.

2. The airbag sealing structure for tidal culverts according to claim 1, characterized in that, Protective steel pipes are fixedly installed on the side slopes of the embankment structure. One end of the inflatable hose is connected to the second plug on the inflatable airbag, and the other end passes through the protective steel pipe and is connected to the inflation device.

3. The airbag sealing structure for tidal culverts according to claim 1, characterized in that, The second plug is provided with an air inlet, one end of which is connected to the inflatable airbag, and the other end is also connected to the inflatable hose.

4. The airbag sealing structure for tidal culverts according to claim 1, characterized in that, The inflation hose is equipped with a pressure gauge, a check valve, and a gas pressure reducing valve at one end near the inflation device. The pressure gauge is used to monitor the pressure inside the inflatable airbag structure in real time; the air stop valve is used to open and close the connection between the inflatable airbag structure and the outside world to maintain the pressure inside the inflatable airbag structure; and the gas pressure reducing valve is used to control the pressure inside the inflatable airbag structure to be lower than the maximum working pressure to ensure inflation safety.

5. The airbag sealing structure for tidal culverts according to claim 1, characterized in that, The length of the traction rope should be the length from the end of the inflatable airbag structure to the adjacent side opening of the culvert, plus any extra length.

6. The airbag sealing structure for tidal culverts according to claim 5, characterized in that, The "excess length" is 1-2 times the diameter of the culvert.

7. A method for airbag sealing of a tidal culvert, characterized in that, The method is based on the airbag sealing structure for tidal culverts as described in claim 1, and includes the following steps: S1: Preparations before sealing: Determine the specifications of the inflatable airbag according to the inner diameter of the culvert and the maximum tidal range of the sea area, check the airtightness of the inflatable airbag, clean up the garbage, attached marine organisms and protrusions on the inner wall of the culvert, and ensure that the inner wall of the culvert is clean. S2: Install protective structures: During low tide, install protective structures at both ends of the culvert and keep the protective structures at the culvert openings open, and install protective steel pipes on the side of the dike. S3: Inflatable airbag accessory connection: The two ends of the inflatable airbag are connected to the traction fixing structure, the inflation hose is inserted into the protective steel pipe, one end of the inflation hose is connected to the air inlet of the inflatable airbag, and the other end is connected to the pressure gauge, the air stop valve and the gas pressure reducing valve, and connected to the inflation equipment. S4: Inflatable airbag into the culvert: During low tide, place the connected inflatable airbag and its accessories into the designed position inside the culvert, connect the traction and fixing structures at both ends of the inflatable airbag to the culvert opening protection structure, and close the culvert opening protection structure. S5: Water culvert sealing process: Keep the air stop valve open, turn on the inflation device and provide positive pressure until the pressure inside the airbag reaches the working pressure. Maintain the pressure inside the airbag in the following two ways: First, close the air stop valve to maintain the pressure inside the inflated airbag and monitor the pressure gauge. When the pressure inside the airbag drops to the lower limit of the working pressure, open the air stop valve and replenish air through the inflation device; Second, keep the air stop valve open, and the inflation device continues to inflate, maintaining the pressure inside the airbag within the working pressure range through the gas pressure reducing valve. S6: Water culvert connection process: Keep the air stop valve open, turn on the inflation equipment and provide negative pressure until the gas in the airbag is completely discharged to the negative pressure state, close the air stop valve, and maintain the small volume state of the inflated airbag under negative pressure. S7: Replacement of Damaged Parts: During low tide, open the protective structures at both ends of the culvert, disconnect the airbag fixing structure from the culvert opening protective structure, remove the inflatable airbag and accessories from the culvert, replace the damaged parts and reinstall them into the culvert, and close the culvert opening protective structure.

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