A method for cleaning the holes of cast-in-place piles of a ramp wharf on an inland river in a mountainous area by using an air compressor and a conduit

Abstract

The present application relates to the field of pile hole construction technology, and relates to a method for using an air compressor and a catheter to clean the hole of a cast-in-place pile of a ramp wharf in a mountainous area, which comprises the following steps: S1, initial hole cleaning: applying pressure to the mud and inputting it into the pile hole, and simultaneously extracting and filtering the mud mixed with slag at the bottom of the pile hole, transferring the slag, and re-inputting the filtered mud into the pile hole; S2, secondary hole cleaning: after the steel cage is installed in place, a catheter is set inside the mud pipe, and the outlet of the catheter is extended to the bottom of the pile hole and then lifted 20cm, after which the mud is extracted through the mud pipe and sieved through the mud separator, and then returned to the pile hole from the outside of the mud pipe, and the air of the air compressor is simultaneously input through the catheter to the bottom of the mud pipe and the inside of the mud pipe is in a negative pressure state; S3, repeating step S2 until the content of slag in the mud in the pile hole is reduced to the construction requirements. While reducing the pollution to the river, the present application relatively fully removes the relatively heavy sediment.

Description

Technical Field

[0001] The present application relates to the field of pile hole construction technology, and in particular to a method for cleaning the holes of cast-in-place piles of a ramp wharf on an inland river in a mountainous area by using an air compressor in combination with a catheter. Background Art

[0002] A wharf is a building built on the riverside or seaside for the flow of passengers and goods. However, the geological conditions in different regions are different, especially for rivers in mountainous areas, the geological environment is relatively complex, especially in inland river areas where the water level changes greatly during the flood season and the dry season. The construction of the wharf often needs to take the change of water level into consideration. Therefore, in the prior art, a ramp is often used to build a ramp at the wharf, and the ramp part extends into the river, so that ships can still dock at the wharf and allow passengers and goods to flow regardless of the flood season or the dry season.

[0003] In the process of building the ramp, it is necessary to build a pile foundation to serve as the foundation of the ramp. Cast-in-place piles are a relatively widely used type of pile foundation. Before pouring cast-in-place piles, the pile holes often need to be cleaned to avoid the influence of the relatively large amount of debris in the pile holes on the quality of the cast-in-place piles. Therefore, in the prior art, in order to clean the pile holes, the commonly used method is to use mud circulation to remove the debris in the pile holes by replacing the mud. In this process, the replaced mud will be precipitated through the mud pool, so that the mud that meets the requirements is re-transported to the pile hole, thereby realizing the cleaning of the debris in the pile hole.

[0004] However, in the inland river area of ​​mountainous areas, on the one hand, since some pile foundations are close to the river, it is relatively inconvenient to build a mud pool and it is easy to pollute the river. On the other hand, the rock content in the slag in some riverside areas is relatively high, and the weight is heavier than the common slag, which is not easy to be replaced with the mud cycle. Therefore, how to reduce the pollution to the river while relatively fully removing the relatively heavy sediment is an urgent problem to be solved in the current hole cleaning construction. Summary of the invention

[0005] In order to reduce pollution to the river and relatively fully remove the relatively heavy sediment, the present application provides a method for cleaning the holes of cast-in-place piles of a ramp wharf on an inland river in a mountainous area by using an air compressor in conjunction with a catheter.

[0006] The present application provides a method for cleaning the bored piles of a mountain inland river ramp wharf by using an air compressor in combination with a conduit, which adopts the following technical solution:

[0007] A method for cleaning the holes of cast-in-place piles of a mountain inland river ramp wharf by using an air compressor in conjunction with a conduit comprises the following steps:

[0008] S1. Preliminary hole cleaning: Apply pressure to the mud and input it into the pile hole. Simultaneously, the mud mixed with debris at the bottom of the pile hole is extracted and filtered, the debris is transferred, and the filtered mud is re-input into the pile hole.

[0009] S2. Secondary hole cleaning: After the steel cage is installed in place, a catheter is set inside the mud pipe. The outlet of the catheter is extended to the bottom of the pile hole and then lifted 20 cm. After that, the mud is pumped out through the mud pipe and screened by the mud separator to separate the debris. Then, the mud pipe returns to the pile hole from the outside of the mud pipe. At the same time, the air from the air compressor is input into the bottom of the mud pipe through the catheter to make the inside of the mud pipe in a negative pressure state.

[0010] S3, repeat step S2 until the content of slag in the mud in the pile hole is reduced to the construction requirement.

[0011] By adopting the above technical scheme, during the hole cleaning process, temporary transfer is first used instead of setting up a mud pool in the riverside area during the hole cleaning process, thereby effectively avoiding the pollution of mud to the water in the river channel; at the same time, during the secondary hole cleaning process, air is introduced into the mud pipe through a conduit, and the negative pressure generated by the air is combined to increase the suction force in the process of mud being extracted, thereby optimizing the suction force on the debris in the pile hole, thereby relatively fully removing the debris in the mud.

[0012] Optionally, during the mud return process in at least step S2, clean water is added to reduce the specific gravity of the mud in the pile hole.

[0013] By adopting the above technical solution, during the mud circulation process, the mud specific gravity can be effectively reduced by adding clean water, so as to reduce the impact on subsequent concrete pouring.

[0014] Optionally, the conduit outputs gas in an intermittent manner.

[0015] By adopting the above technical solution, air is injected into the mud pipe at intervals, which causes the suction force on the debris at the bottom of the pile hole to change periodically, so that when the mud circulates, it can periodically flush the debris and further relatively fully clean the debris.

[0016] Optionally, both the outer side of the mud pipe and the conduit output gas into the pile hole, and the gas output from the outer side of the mud pipe and the gas output from the conduit into the mud pipe are output alternately.

[0017] By adopting the above technical scheme, due to the consolidation of part of the debris, some consolidated debris will still remain at the bottom of the pile hole after the debris cleaning is completed. At this time, the process of breaking the bubbles generated by the externally injected gas can effectively produce an impact effect on the debris, so as to further fully clean the debris. At the same time, since the bubbles formed by the gas in the pile hole flow upward under their own buoyancy, and the transaction input method, after the air is injected outside the mud pipe, the suction inside the mud pipe increases, so that the mud is discharged from the bottom of the mud pipe, and at least part of the bubbles outside the mud pipe can enter the mud pipe from the outside of the mud pipe. In this process, the bubbles can be further relatively fully contacted with the debris at the bottom of the pile hole and the mud can be extracted in the process of increasing suction, thereby achieving the purpose of optimizing the debris cleaning effect.

[0018] Optionally, the output port of the air compressor is provided with a diverter mechanism, and the diverter mechanism includes a control component and a diverter component arranged on the outside of the bottom of the mud pipe, the control component is provided with a gas input port and two gas output ports, the gas input port is connected to the output port of the air compressor, one of the gas output ports is connected to the conduit, and the other gas output port is connected to the input end of the diverter component, and the output end of the diverter component is located at the bottom of the mud pipe, and the control component is used to control the gas to flow alternately into the diverter component and the conduit.

[0019] By adopting the above technical solution, when cleaning the hole, the air output by the air compressor can be made to flow alternately into the diverter and the conduit through the control member, so as to achieve alternate injection into the inside and outside of the mud pipe.

[0020] Optionally, the diverter component includes a diverter pipe and an outer sleeve and is fixedly connected to a diverter ring of the mud pipe, wherein both ends of the diverter pipe are respectively connected to one of the output ends of the control component and the diverter ring, and the diverter ring is provided with a lower opening and an annular groove arranged around the mud pipe, and the annular groove is connected to the diverter pipe.

[0021] By adopting the above technical solution, when injecting air into the outside of the mud pipe, the shunt pipe only needs to guide the gas output by the control component into the annular groove in the shunt ring and then introduce the gas into the mud outside the mud pipe through the annular groove.

[0022] Optionally, a rotating spray ring mounted on the mud pipe is rotatably provided on the opening edge of the annular groove, the rotating spray ring covers the annular groove, and the rotating spray ring is provided with a plurality of injection holes connected to the annular groove, the injection direction of the injection holes is staggered with the central axis of the rotating spray ring and is used to drive the rotating spray ring to rotate.

[0023] By adopting the above technical solution, since the gas output by the air compressor is a relatively high-pressure gas, in the process of the gas being ejected through the injection hole, it will also generate thrust on the rotating spray ring and push the rotating spray ring to rotate, so as to achieve relatively thorough cleaning of the bottom of the pile hole.

[0024] Optionally, a sealing ring made of a flexible material is fixedly connected to the outer edge of the annular groove, and the inner edge of the sealing ring overlaps the rotating spray ring.

[0025] By adopting the above technical solution, under the pressure of external mud, the sealing ring will fit relatively tightly to the rotating spray ring to achieve a sealing effect.

[0026] Optionally, the inner and outer side walls of the annular groove parallel to the central axis are respectively formed with mounting annular grooves, and the rotating spray ring is fixedly connected to a connecting ring rotatably arranged on the inner side of the mounting annular groove.

[0027] By adopting the above technical solution, the connecting ring can be restricted by the mounting ring groove, so that the rotating spray ring can be rotatably connected to the diverter ring.

[0028] Optionally, the position of the output end of the injection hole of the rotating spray ring is arranged to protrude along the radial direction of the rotating spray ring.

[0029] By adopting the above technical solution, the torque generated by the thrust of the injection holes on the rotating spray ring is increased, so as to facilitate the rotation of the rotating spray ring.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] 1. In the initial hole cleaning process, the large amount of debris generated by drilling in the pile hole is mainly cleaned to avoid the possibility that the distance between the steel cage and the pile hole is too large due to excessive debris at the bottom of the pile hole after installation. In this process, the replaced mud is directly screened so that the debris can be directly transported or shipped away;

[0032] 2. During the secondary hole cleaning process, the air compressor uses the control components to alternately allow high-pressure gas to pass through the conduit and the diversion pipe respectively. In this process, the gas in the diversion pipe enters the rotating spray ring through the annular groove and is rotated and sprayed out through the injection hole, thereby realizing the alternating input of gas inside and outside the mud pipe. At the same time, the rotation of the rotating spray ring itself can also achieve relatively sufficient flushing of the bottom of the pile hole, so as to achieve relatively sufficient cleaning of the debris in the pile hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a flowchart of the method in Example 1 of the present application.

[0034] Figure 2 This is a schematic diagram of the first hole cleaning in Example 1 of the present application.

[0035] Figure 3 This is a schematic diagram of the second hole cleaning in Example 2 of the present application.

[0036] Figure 4 It is a schematic cross-sectional structural diagram of the air compressor, diversion mechanism and mud pump in Example 2 of the present application.

[0037] Figure 5 It is a schematic diagram of the cross-sectional structure of the rotating spray ring and the diverter in Example 2 of the present application.

[0038] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure of part A.

[0039] Figure 7 It is a schematic diagram of the explosion structure of the diverter ring and the rotating spray ring in Example 2 of the present application.

[0040] Explanation of the reference numerals: 1. conduit; 2. mud pipe; 3. air compressor; 4. diverter mechanism; 41. control component; 411. gas inlet; 412. gas outlet; 42. diverter component; 421. diverter pipe; 422. diverter ring; 423. ring groove; 424. sealing ring; 425. mounting ring groove; 43. rotating spray ring; 431. injection hole; 5. mud pump. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-7 This application is described in further detail.

[0042] The embodiment of the present application discloses a method for cleaning the holes of cast-in-place piles of a ramp wharf on an inland river in a mountainous area by using an air compressor in conjunction with a catheter.

[0043] Example 1, reference Figure 1 and Figure 2 The method of using an air compressor and a conduit to clean the holes of cast-in-place piles for the ramp wharf in the mountainous area includes the following steps:

[0044] S1. Preliminary hole cleaning: Apply pressure to the mud and input it into the pile hole. Simultaneously, the mud mixed with debris at the bottom of the pile hole is extracted and filtered, the debris is transferred, and the filtered mud is re-input into the pile hole.

[0045] Specifically, the mud pump 5 can be used to pump out the mud in the pile hole, and the extracted mud is separated on site by a screen or a sand and gravel separator. The slag is transported by a transport vehicle or a prefabricated container, such as a slag temporary storage pit pre-cast with concrete in a flat area, and the slag is transferred to the slag temporary storage pit through a pipeline; or a metal buffer box is used to buffer the slag, and then transported by a transport vehicle. Through step S1, the slag retained in the process of drilling the pile hole is cleaned to facilitate the subsequent installation of the steel cage, etc., and reduce the possibility of the mud output from the pile hole polluting the river water quality.

[0046] S2. Secondary hole cleaning: After the steel cage is installed in place, a conduit 1 is set inside the mud pipe 2, and the outlet of the conduit 1 is extended to the bottom of the pile hole and then lifted 20 cm, so that the outlet of the conduit 1 is relatively accurately located inside the pile hole. After that, the mud is pumped out through the mud pipe 2 and sifted by the mud separator to return to the pile hole from the outside of the mud pipe 2. At the same time, the air of the air compressor 3 is input to the bottom of the mud pipe 2 through the conduit 1 to make the inside of the mud pipe 2 in a negative pressure state.

[0047] In step S2, during the installation of the steel cage, it will contact the inner wall of the pile hole, causing a certain amount of debris to be re-generated in the pile hole. During this process, the mud pipe 2 also extracts mud through the mud pump 5, and separates the debris through the mud separator. At the same time, the air pumped into the mud pipe 2 by the air compressor 3 through the conduit 1 will cause negative pressure to be generated inside the mud pipe 2. Under the action of the buoyancy of the bubbles formed by the air inside the mud pipe 2, the force of extracting mud from the mud pipe 2 will change periodically in cooperation with the mud pump 5, so that it can have a relatively better impact effect on the relatively large debris at the bottom of the pile hole, so as to relatively fully clean the debris. Among them, when using the air compressor 3 to cooperate with the conduit 1 to clean the hole, it is necessary to survey the geology in advance, and it is necessary to carry out in areas with relatively stable geology.

[0048] At the same time, when the mud is returned to the pile hole in steps S1 and S2, clean water is added in at least one step to reduce the specific gravity of the mud in the pile hole. In the embodiment of the present application, in step S2, clean water is added when the mud is returned to gradually reduce the specific gravity of the mud as the mud circulates before concrete pouring.

[0049] S3, repeat step S2 until the content of slag in the mud in the pile hole is reduced to the construction requirement.

[0050] Specifically, the specific gravity of the slurry before pouring concrete is as follows:

[0051] Sediment at the bottom of the hole: column depth ≤5cm.

[0052] Mud density: 1.03~1.1.

[0053] Sand content is less than 2%.

[0054] Viscosity: 17s~20s.

[0055] The implementation principle of Example 1 of the present application is: in the initial hole cleaning process, the large amount of debris generated in the pile hole due to drilling is mainly cleaned to avoid the possibility that the distance between the steel cage and the pile hole is too large due to excessive debris at the bottom of the pile hole after the installation of the steel cage, and in this process, the replaced mud is directly screened so that the debris can be directly transported or shipped away.

[0056] During the secondary hole cleaning, the air compressor 3 cooperates with the conduit 1 to drive the mud in the pile hole to pulse-impact the debris in the pile hole, so that the debris can be relatively fully extracted along with the mud. The extracted mud is separated by the mud separator and the debris is transported. In this process, some debris blocks that are partially bonded together can be broken during the bubble bursting process to reduce the load on the mud separator that screens the debris due to slurry replacement, so as to achieve the effect of reducing pollution to the river while relatively fully removing the relatively heavy sediment.

[0057] Example 2, reference Figure 2 and Figure 3 The difference from Example 1 is that during the hole cleaning process, a diversion mechanism 4 is further provided at the top of the mud pipe 2, and the diversion mechanism 4 includes a control member 41 and a diversion member 42 provided on the outer side of the bottom of the mud pipe 2.

[0058] Reference Figure 3 and Figure 4 The control part 41 is provided with a gas input port 411 and two gas output ports 412. The gas input port 411 is connected to the output port of the air compressor 3 through a pipeline. One of the gas output ports 412 is connected to the guide tube 1 through a pipeline penetrating into the mud pipe 2, and the other gas output port 412 is connected to the diverter 42 and is used to transport gas from the outside of the mud pipe 2. The control part 41 is a gas reversing valve, so that the control part 41 can alternately pass gas into the guide tube 1 and the diverter 42, so that the gas inside the guide tube 1 is output in intervals, and the inside and outside of the mud pipe 2 are alternately output to the pile hole.

[0059] During the secondary hole cleaning, since the inside and outside of the mud pipe 2 will alternately output gas through the conduit 1 and the diverter 42 respectively, when the air is output from the outside of the mud pipe 2, the gas output from the conduit 1 on the inside of the mud pipe 2 is discharged, resulting in the increase of suction on the outside of the mud pipe 2. At this time, the bubbles on the outside of the mud pipe 2 can be sucked into the inside of the mud pipe 2 along with the mud. In this process, the bubbles will break into smaller bubbles, and can have an impact and crushing effect on the debris at the bottom of the pile hole located outside the mud pipe 2, so as to further optimize the adequacy of cleaning the debris, and can also further reduce the debris content in the replaced mud, thereby reducing the possibility of pollution to the river channel, and can also further relatively fully clean the debris in the pile hole.

[0060] Of course, in other embodiments, two air compressors 3 may be respectively controlled in pulse mode to input gas to the inside and outside of the mud pipe 2 , so as to achieve alternating input of gas to the inside and outside of the mud pipe 2 .

[0061] Specifically, the flow divider 42 includes a flow divider pipe 421 and a flow divider ring 422. One end of the flow divider pipe 421 is fixed and connected to the gas outlet 412 of the control member 41, and the other end of the flow divider pipe 421 is fixedly connected to the top of the flow divider ring 422. The flow divider ring 422 is coaxially sleeved and fixedly connected to the end of the mud pipe 2 located at the bottom of the pile hole. The flow divider ring 422 is fixedly connected to the outer wall of the mud pipe 2 by bolts, and the flow divider ring 422 is provided with an annular groove 423 with a lower opening, and the flow divider pipe 421 is connected to the annular groove 423.

[0062] Reference Figure 5 and Figure 7 , the annular groove 423 is arranged around the mud pipe 2, and the two side walls of the annular groove 423 parallel to the central axis are respectively provided with mounting annular grooves 425. At the same time, a rotating spray ring 43 is rotatably arranged at the opening edge of the annular groove 423, and the rotating spray ring 43 is arranged on the mud pipe 2. The rotating spray ring 43 is coaxially fixedly connected with a connecting ring, and the connecting ring is coaxially clamped and rotatably arranged in the mounting annular groove 425. Among them, bearings are respectively arranged at both ends of the connecting ring along the axial direction, and the ends of the two bearings that are far away from each other are respectively abutted against the inner wall of the mounting annular groove 425, so as to reduce the resistance of the rotating spray ring 43 to the rotation of the diverter ring 422.

[0063] At the same time, a plurality of injection holes 431 are provided inside the rotating spray ring 43 to spray the airflow inside the annular groove 423 toward the inner wall of the pile hole. Specifically, the injection holes 431 first pass through the rotating spray ring 43 along a path parallel to the central axis of the rotating spray ring 43 in a direction away from the central axis of the diverter ring 422, and the output port of the injection hole 431 is tilted in a direction away from the diverter ring 422 and the output port direction of the injection hole 431 is staggered with the central axis of the rotating spray ring 43, so that when the injection hole 431 outputs air, it can push the rotating spray ring 43 to rotate relative to the diverter ring 422.

[0064] Furthermore, in order to relatively fully promote the rotation of the rotating spray ring 43 and reduce the resistance during rotation, the position of the output end of the injection hole 431 of the rotating spray ring 43 corresponding to the rotating spray ring 43 is provided with a radial protrusion along the rotating spray ring 43, and the protruding portion is annular, so as to increase the torque when the gas is output from the injection hole 431 and relatively fully promote the rotation of the rotating spray ring 43. At the same time, the protruding setting can effectively reduce the resistance of the mud to the rotation of the rotating spray ring 43 during rotation compared to directly using a nozzle.

[0065] Reference Figure 5 and Figure 6In addition, in order to seal between the rotating spray ring 43 and the diverter ring 422 and reduce the mud and the like entering the mounting ring groove 425 and causing obvious resistance to the rotation of the rotating spray ring 43, the outer edge and the inner edge of the ring groove 423 are fixedly connected with a sealing ring 424 made of a flexible material, and the inner edges of the two sealing rings 424 are overlapped with the rotating spray ring 43. The sealing ring 424 is made of a flexible material, such as rubber, silicone, etc. When in use, since the rotating spray ring 43 will generate pressure on the inner ring of the sealing ring 424 located on the inner side when rotating, and the external mud and the like will generate pressure on the inner ring of the sealing ring 424 located on the outer side, the sealing ring 424 can be attached to the rotating spray ring 43 under the external pressure, so as to achieve the effect of self-sealing while reducing the influence on the rotation of the rotating spray ring 43.

[0066] The implementation principle of Example 2 of the present application is as follows: when cleaning the hole, the air compressor 3 uses the control component 41 to alternately allow the high-pressure gas to pass through the conduit 1 and the diverter pipe 421 respectively, and in this process, the gas in the diverter pipe 421 enters the rotating spray ring 43 through the annular groove 423 and is ejected through the injection hole 431, thereby realizing the alternating input of gas from the inside and outside of the mud pipe 2, and can also achieve relatively sufficient flushing of the bottom of the pile hole through the rotation of the rotating spray ring 43 itself, so as to achieve relatively sufficient cleaning of the debris in the pile hole through alternating flushing.

[0067] Of course, during the hole cleaning process, according to the alternating time, a one-way valve may be provided at the output port of the conduit 1 and the output port of the injection hole 431 to reduce the possibility of mud backflow.

[0068] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for cleaning the holes of cast-in-place piles of a ramp wharf in a mountainous area by using an air compressor in combination with a catheter, characterized in that: The following steps are involved: S1. Preliminary hole cleaning: Apply pressure to the mud and input it into the pile hole, and simultaneously extract and filter the mud mixed with debris at the bottom of the pile hole, transfer the debris, and re-input the filtered mud into the pile hole; S2, secondary hole cleaning: after the steel cage is installed in place, a guide tube (1) is arranged inside the mud pipe (2), the outlet of the guide tube (1) is extended to the bottom of the pile hole and then lifted up by 20 cm, after which the mud is pumped out through the mud pipe (2) and the mud is screened by the mud separator and then flows back into the pile hole from the outside of the mud pipe (2), and at the same time, air from the air compressor (3) is input into the bottom of the mud pipe (2) through the guide tube (1) so that the inside of the mud pipe (2) is in a negative pressure state; S3, repeat step S2 until the content of slag in the mud in the pile hole is reduced to the construction requirement; The outer side of the mud pipe (2) and the conduit (1) both output gas into the pile hole, and the gas output from the outer side of the mud pipe (2) and the gas output from the conduit (1) into the mud pipe (2) are output alternately; The outlet of the air compressor (3) is provided with a flow dividing mechanism (4), the flow dividing mechanism (4) comprising a control member (41) and a flow dividing member (42) arranged outside the bottom of the mud pipe (2), the control member (41) being provided with a gas input port (411) and two gas output ports (412), the gas input port (411) being connected to the outlet of the air compressor (3), one of the gas output ports (412) being connected to the conduit (1), and the other gas output port (412) being connected to the input end of the flow dividing member (42), and the output end of the flow dividing member (42) being located at the bottom of the mud pipe (2), the control member (41) being used to control the gas to alternately flow into the flow dividing member (42) and the conduit (1); The flow dividing member (42) comprises a flow dividing pipe (421) and a flow dividing ring (422) which is fixedly connected to the mud pipe (2) and has an outer sleeve. The two ends of the flow dividing pipe (421) are respectively connected to one of the output ends of the control member (41) and the flow dividing ring (422). The flow dividing ring (422) is provided with a lower opening and an annular groove (423) which is arranged around the mud pipe (2). The annular groove (423) is connected to the flow dividing pipe (421).

2. The method for cleaning the bored piles of a mountain inland river ramp wharf using an air compressor in conjunction with a catheter according to claim 1, characterized in that: During the mud reflux process in at least step S2, clean water is added to reduce the specific gravity of the mud in the pile hole.

3. The method for cleaning the bored piles of a mountain inland river ramp wharf using an air compressor in conjunction with a catheter according to claim 1, characterized in that: The conduit (1) outputs gas in an intermittent manner.

4. The method for cleaning the bored piles of a mountain inland river ramp wharf using an air compressor and a catheter according to claim 1, characterized in that: A rotating spray ring (43) sleeved on the mud pipe (2) is rotatably arranged at the opening edge of the annular groove (423); the rotating spray ring (43) covers the annular groove (423), and the rotating spray ring (43) is provided with a plurality of spray holes (431) connected to the annular groove (423); the spray directions of the spray holes (431) are staggered with respect to the central axis of the rotating spray ring (43) and are used to drive the rotating spray ring (43) to rotate.

5. The method for cleaning the bored piles of a mountain inland river ramp wharf using an air compressor in conjunction with a catheter according to claim 4, characterized in that: A sealing ring (424) made of a flexible material is fixedly connected to the outer edge of the annular groove (423), and the inner edge of the sealing ring (424) overlaps the rotating spray ring (43).

6. The method for cleaning the bored piles of a mountain inland river ramp wharf using an air compressor and a catheter according to claim 4, characterized in that: The inner and outer side walls of the annular groove (423) parallel to the central axis are respectively formed with mounting annular grooves (425), and the rotating spray ring (43) is fixedly connected to a connecting ring rotatably arranged inside the mounting annular groove (425).

7. The method for cleaning the bored piles of a mountain inland river ramp wharf using an air compressor and a catheter according to claim 4, characterized in that: The position of the output end of the rotating spray ring (43) corresponding to the spray hole (431) is arranged to protrude along the radial direction of the rotating spray ring (43).

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