Method for cleaning pile hole of cast-in-place pile of ramp wharf of inland river in mountainous area using air compressor

Abstract

A method for cleaning a pile hole of a cast-in-place pile for a wharf or ramp in water. The method comprises a first step of preliminary cleaning consisting of injecting pressurised slurry into the pi

Description

METHOD FOR CLEANING PILE HOLE OF CAST-IN-PLACE PILE OF RAMP WHARF OF INLAND RIVER IN MOUNTAINOUS AREA USING AIR COMPRESSOR AND CONDUIT TECHNICAL FIELD

[0001] The present application relates to the field of pile hole construction technology, and in particular, to a method for cleaning a pile hole of a cast-in-place pile of a ramp wharf of an inland river in a mountainous area by using an air compressor and a conduit. BACKGROUND ART

[0002] Wharf is a building built on the riverside or seaside for passenger flow and cargo circulation, but the geological conditions are different in different regions, especially for rivers in mountainous areas, and the geological environment is relatively complex, especially for inland river areas where the water level changes greatly in wet period and dry period, the wharf construction often needs to take into account the water level changes. Therefore, in the prior art, it is common to construct a ramp at the wharf, with the ramp extending partially into a river channel, so that a vessel can still be docked at the wharf for passenger flow and cargo circulation, whether in wet period or dry period.

[0003] In the process of constructing the ramp, a pile foundation needs to be constructed to be used as the foundation of the ramp. The cast-in-place pile is a relatively widely used type of pile foundation at present. Before the cast-in-place pile is poured, it is often necessary to perform hole cleaning processing on the pile hole to avoid the influence of the muck in the pile hole on the quality of cast-in-place pile. Therefore, in the prior art, in order to perform the hole cleaning processing for the pile hole, a method of using a slurry circulation method is commonly used, and the muck and other matters in the pile hole are removed by means of slurry exchange and in this process, the replaced slurry is precipitated through a slurry pool, so that qualified slurry is re-conveyed into the pile hole, thereby achieving the cleaning of the muck in the pile hole.

[0004] However, in the areas of inland rivers in mountainous areas, on the one hand, the construction of the slurry pool is relatively inconvenient and easy to pollute the rivers due to some pile foundations approaching the rivers, and on the other hand, the muck in some riverside areas is relatively rich in rock content, and compared with relatively common muck the weight thereof is heavier, so it is not easy to be replaced along with the slurry circulation. Therefore, how to reduce the pollution to the rivers while relatively sufficiently remove the relatively heavy sediment is a current problem to be solved urgently. SUMMARY

[0005] In order to reduce the pollution to the rivers while relatively sufficiently remove the relatively heavy sediment, the present application provides a method for cleaning a pile hole of a cast-in-place pile of a ramp wharf of an inland river in a mountainous area by using an air compressor and a conduit.

[0006] The present application provides a method for cleaning a pile hole of a cast-in-place pile of a ramp wharf of an inland river in a mountainous area by using an air compressor and a conduit, using the following technical solution:

[0007] a method for cleaning a pile hole of a cast-in-place pile of a ramp wharf of an inland river in a mountainous area by using an air compressor and a conduit, including the steps of

[0008] SI, preliminary pile hole cleaning: applying pressure to slurry and inject the slurry into a pile hole, and synchronously pumping out and filtering the slurry mixed with muck at a bottom of the pile hole, transferring the muck, and inject the filtered slurry into the pile hole again;

[0009] S2, secondary pile hole cleaning: after a steel reinforcement cage is mounted in place, providing a conduit on an inner side of a slurry pipe, an outlet of the conduit extending to the bottom of the pile hole and then is lifted up by 20 cm, after which the slurry is pumped out through the slurry pipe, the muck is sieved by a slurry separator, and the slurry flows back from an outer side of the slurry pipe to the pile hole, and synchronously injecting air of the air compressor to a bottom of the slurry pipe through the conduit such that an interior of the slurry pipe is in a negative pressure state;

[0010] S3, repeating step S2 until a content of the muck in the slurry in the pile hole meets a construction requirement.

[0011] By adopting the above-mentioned technical solution, in the process of hole cleaning, the method of temporary transfer is firstly used, instead of setting a slurry pool in the riverside area in the process of hole cleaning, so as to effectively avoid the pollution of slurry to the water in the river channel; at the same time, in the process of secondary pile hole cleaning, air is also introduced into the interior of the slurry pipe through the conduit, in cooperation with the negative pressure generated by the air, so as to raise the suction force in the process of pumping slurry out, and optimize the suction force on the muck in the pile hole, thereby relatively sufficiently removing the muck in the slurry.

[0012] Optionally, at least during a process of the slurry flowing back in step S2, the method further comprises: filling the pile hole with clear water to reduce a specific gravity of the slurry in the pile hole.

[0013] By adopting the above-mentioned technical solution, in the mud circulation process, by adding clear water, the specific gravity of slurry can be effectively reduced, so as to reduce the influence on subsequent concrete pouring.

[0014] Optionally, the conduit outputs gas at intervals.

[0015] By adopting the above-mentioned technical solution, air is injected into the slurry pipe at intervals, so that the suction force on the muck at the bottom of the pile hole changes periodically, so that the muck can be washed periodically and further cleaned relatively sufficiently when the slurry circulates and flows.

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

[0017] By adopting the above-mentioned technical solution, since part of the muck is consolidated, the partially consolidated muck will remain at the bottom of the pile hole after the muck cleaning is completed. At this time, through the process of bubble breaking generated by the gas injected from the outside, an impact effect can be effectively generated on the muck to further sufficiently clean the muck, and at the same time, since the bubbles formed by the gas in the pile hole flow upwards under their own buoyancy, the way of exchanging and injecting will make the suction force inside the slurry pipe increase after the air is injected outside the slurry pipe so that the slurry is discharged from the bottom of the slurry pipe. At least part of the bubbles on the outside of the slurry pipe can enter the slurry pipe from the outside of the slurry pipe, and in the process, the air bubbles can be further brought into contact with the muck at the bottom of the pile hole relatively sufficiently and the slurry can be pumped out during the increase of the suction force, so as to achieve the purpose of optimizing the cleaning effect of the slag.

[0018] Optionally, an outlet of the air compressor is provided with a flow dividing mechanism, the flow dividing mechanism includes a control member and a flow dividing member provided outside the bottom of the slurry pipe, the control member is provided with one gas inlet and two gas outlets, the gas inlet is in communication with the outlet of the air compressor, wherein one of the gas outlets is in communication with the conduit, and the other of the gas outlets is in communication with an input end of the flow dividing member, and an output end of the flow dividing member is located at the bottom of the slurry pipe, and the control member is configured for controlling the gas alternately flowing into the flow dividing member and the conduit.

[0019] By adopting the above-mentioned technical solution, during hole cleaning, it is possible to enable the air output from the air compressor to flow alternately into the flow dividing member and the conduit respectively via the control member, so as to realize the alternate injection of the inner side and the outer side of the slurry pipe.

[0020] Optionally, the flow dividing member includes a flow dividing pipe and a flow dividing ring sleeved and fixedly connected to the slurry pipe, two ends of the flow dividing pipe are respectively in communication with one of output ends of the control member and the flow dividing ring, the flow dividing ring is provided with an annular groove with a lower opening and provided around the slurry pipe, and the annular groove is in communication with the flow dividing pipe.

[0021] By adopting the above-mentioned technical solution, when air is injected outside the slurry pipe, it is only necessary for the flow dividing pipe to introduce the gas output by the control member into the annular groove in the flow dividing ring and to introduce the gas into an interior of the slurry outside the slurry pipe through the annular groove.

[0022] Optionally, a rotary spray ring is rotatably arranged around an opening edge of the annular groove, the rotary spray ring is sleeved on the slurry pipe, the rotary spray ring covers the annular groove, and the rotary spray ring is provided with a plurality of spray holes in communication with the annular groove, and a spray direction of the spray hole is offset from a central axis of the rotary spray ring and is configured for driving the rotary spray ring to rotate.

[0023] By adopting the above-mentioned technical solution, since the gas output from the air compressor is gas with a relatively high pressure, a thrust force is also generated to the rotary spray ring and the rotary spray ring is pushed to rotate during the gas ejection through the spray holes, so as to achieve a relatively sufficient cleaning of the bottom of the pile hole.

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

[0025] By adopting the above-mentioned technical solution, under the pressure of the external slurry, the sealing ring is relatively closely fitted to the rotary spray ring, so as to achieve the sealing effect.

[0026] Optionally, an inner side wall and an outer side wall of the annular groove parallel to the central axis are respectively formed with a mounting annular groove, and the rotary spray ring is fixedly connected with a connection ring rotatably provided on an inner side of the mounting annular groove.

[0027] By adopting the above-mentioned technical solution, the rotary spray ring can be rotatably connected to the flow dividing ring through the restriction of the mounting annular groove by the connection ring.

[0028] Optionally, the rotary spray ring protrudes along a radial direction of the rotary spray ring at a position corresponding to an output end of the spray hole.

[0029] By adopting the above-mentioned technical solution, the moment generated by the thrust force of the spray holes on the rotary spray ring is increased so as to facilitate the rotation of the rotary spray ring.

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

[0031] 1 .in the preliminary pile hole cleaning process, a large amount of muck generated in the pile hole due to drilling is mainly cleaned, so as to avoid the possibility of excessive spacing between the steel reinforcement cage and the pile hole due to excessive muck at the bottom of the pile hole after the steel reinforcement cage is mounted, and in this process, the muck is directly conveyed away or transported away by directly sieving the replaced slurry; and

[0032] 2.in the process of secondary pile hole cleaning, the air compressor alternately makes the high-pressure gas pass through the conduit and the flow dividing pipe through the control member, and in this process, the gas in the flow dividing pipe enters the rotary spray ring through the annular groove and is sprayed out through the spray holes, so as to realize the alternate input of gas in the outer side of the slurry pipe, and at the same time, the relatively sufficient scouring of the bottom of the pile hole can be realized through the rotation of the rotary spray ring itself, so as to realize the relatively sufficient cleaning of the muck in the pile hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Fig. 1 is a block flowchart of a method according to embodiment 1 of the present disclosure.

[0034] Fig. 2 is a schematic diagram of a first hole cleaning according to embodiment 1 of the present disclosure.

[0035] Fig. 3 is a schematic diagram of a second hole cleaning according to embodiment 2 of the present disclosure.

[0036] Fig. 4 is a cross-sectional schematic structural diagram of an air compressor, a flow dividing mechanism and a slurry pump according to embodiment 2 of the present disclosure.

[0037] Fig. 5 is a schematic structural cross-sectional diagram of a rotary spray ring and a flow dividing member according to embodiment 2 of the present disclosure.

[0038] Fig. 6 is an enlarged structural schematic diagram at portion A in Fig. 5.

[0039] Fig. 7 is an exploded schematic structural diagram of a flow dividing ring and a rotary spray ring according to embodiment 2 of the present disclosure.

[0040] Description of reference numbers: 1, conduit; 2, slurry pipe; 3, air compressor; 4, flow dividing mechanism; 41, control member; 411, gas inlet; 412, gas outlet; 42, flow dividing member; 421, flow dividing pipe; 422, flow dividing ring; 423, annular groove; 424, sealing ring; 425, mounting annular groove; 43, rotary spray ring; 431, spray hole; 432, connection ring; 5, slurry pump. DETAILED DESCRIPTION

[0041] The present disclosure is further illustrated in combination with Figs. 1-7.

[0042] The embodiments of the present application disclose a method for cleaning a pile hole of a cast-in-place pile of a ramp wharf of an inland river in a mountainous area by using an air compressor and a conduit.

[0043] For embodiment 1, with reference to Figs. 1 and 2, a method for cleaning a pile hole of a cast-in-place pile of a ramp wharf of an inland river in a mountainous area by using an air compressor and a conduit includes the following steps:

[0044] SI, preliminary pile hole cleaning: pressure is applied to slurry to inject the slurry into a pile hole, and the slurry mixed with muck at a bottom of the pile hole is synchronously pumped out and filtered, the muck is transferred, and filtered slurry is input into the pile hole again.

[0045] Specifically, a slurry pump 5 can be used to pump out the slurry in the pile hole, and the muck after the slurry is separated on-site by a screen mesh or a sand-stone separator is transported through a transport vehicle or a pre-fabricated container. For example, a muck temporary storage pit pre-poured with concrete in a gentle area is used, and the muck is transferred into the muck temporary storage pit through a pipeline; or a metal buffer tank is used for buffering the muck and thereafter the muck is transported by the transport vehicle. Through the step SI, the residual muck remaining in the process of drilling the pile hole is cleaned, so as to facilitate the subsequent mounting of the steel reinforcement cage, etc. and reduce the possibility of the slurry discharged from the pile hole polluting a water quality of the river.

[0046] S2, secondary pile hole cleaning: after a steel reinforcement cage is mounted in place, a conduit 1 is provided on an inner side of a slurry pipe 2, an outlet of the conduit 1 extends to the bottom of the pile hole and then is lifted up by 20 cm, such that the outlet of the conduit 1 is relatively accurately positioned inside the pile hole. Hereafter, the slurry is pumped out through the slurry pipe 2, the muck is sieved by a slurry separator, and the slurry flows back from an outer side of the slurry pipe 2 to the pile hole, and synchronously air of the air compressor 3 is input to a bottom of the slurry pipe 2 through the conduit 1 such that an interior of the slurry pipe 2 is in a negative pressure state.

[0047] In step S2, since a certain amount of muck is regenerated in the pile hole due to contact of the steel reinforcement cage with an inner wall of the pile hole during the mounting of the steel reinforcement cage, during this process, the slurry pipe 2 also pumps out the slurry through the slurry pump 5 and separates the muck through the slurry separator. At the same time, the air pumped by the air compressor 3 through the conduit 1 will generate a negative pressure at the inner side of the slurry pipe 2, and under the action of the buoyancy of the bubbles on their own formed by the air at the inner side of the slurry pipe 2, the force for pumping out the slurry at the inner side of the slurry pipe 2 will periodically change in cooperation with the slurry pump 5, so that a relatively better impact effect can be exerted on the relatively large muck at the bottom part of the pile hole, so as to relatively sufficiently clean the muck. When the air compressor 3 is used in combination with the conduit 1 for hole cleaning, the geology needs to be investigated in advance, and the cleaning shall be carried out in areas where the geology is relatively stable.

[0048] At the same time, when the slurry blows back to the pile hole in steps SI and S2, clear water is added in at least one step for reducing the specific gravity of the slurry in the pile hole, and in the embodiment of the present application, it is performed in step S2, wherein clear water is added when the slurry flows back for successively reducing the specific gravity of the slurry with the slurry circulation before the concrete pouring.

[0049] S3, step S2 is repeated until a content of the muck in the slurry in the pile hole meets a construction requirement.

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

[0051] Hole bottom sediment: column pile depth< 5 cm.

[0052] Slurry specific gravity: 1.03-1.1 g / cm3.

[0053] Sand content: <2%.

[0054] Viscosity: 17 Pa-s-20 Pa-s.

[0055] The implementation principle of embodiment 1 of the present application is as follows: in the preliminary pile hole cleaning process, a large amount of muck generated in the pile hole due to drilling is mainly cleaned, so as to avoid the possibility of excessive spacing between the steel reinforcement cage and the pile hole due to excessive muck at the bottom of the pile hole after the steel reinforcement cage is mounted, and in this process, the muck is directly conveyed away or transported away by directly sieving the replaced slurry.

[0056] In the secondary pile hole cleaning, the slurry in the pile hole is driven by the air compressor 3 in combination with the conduit 1 to pulse impact the muck in the pile hole, so that the muck can be relatively sufficiently extracted along with the slurry, and the slurry pumped out is separated by the slurry separator and the muck is transported, and in this process, the partially bonded muck blocks can also be broken in the process of bubble breaking, so as to reduce the load of the slurry separator for screening the muck due to slurry exchange, so as to achieve the effect of relatively sufficiently removing the relatively heavy sediment while reducing the pollution to the river.

[0057] Embodiment 2, with reference to Figs. 2 and 3, differs from embodiment 1 in that the flow dividing mechanism 4 is further provided at a top of the slurry pipe 2 during the hole cleaning, the flow dividing mechanism 4 including a control member 41 and a flow dividing member 42 provided at an outer side of the bottom of the slurry pipe 2.

[0058] Referring to Figs. 3 and 4, the control member 41 is provided with one gas inlet 411 and two gas outlets 412, the gas inlet 411 being in communication with an outlet of the air compressor 3 via a pipe, one of the gas outlets 412 being in communication with the conduit 1 via a pipe penetrating into an interior of the slurry pipe 2, and the other gas outlet 412 being in communication with the flow dividing member 42 and serving to convey gas from the outer side of the slurry pipe 2. The control member 41 is a gas reversing valve, so that the control member 41 can alternately introduce the gas into the conduit 1 and the flow dividing member 42, so that the gas at the inner side of the conduit 1 is output at intervals, and at the same time, the inner side and the outer side of the slurry pipe 2 alternately output gas to the pile hole.

[0059] During the secondary pile hole cleaning, since the inner side and the outer side of the slurry pipe 2 alternately output gas via the conduit 1 and the flow dividing member 42, when the outer side of the slurry pipe 2 outputs air, the gas output by the conduit 1 at the inner side of the slurry pipe 2 is discharged, resulting in the time when the suction force on the outer side of the slurry pipe 2 increases. At this time, the bubbles outside the slurry pipe 2 can follow the slurry to be sucked into the inner side of the slurry pipe 2, and during this process the bubbles will be broken into smaller bubbles in the process, and the muck at the bottom of the pile hole at the outer side of the slurry pipe 2 can be impacted and broken, so as to further optimize the adequacy of the muck cleaning, while at the same time the muck content of the displaced slurry can be further reduced, thereby reducing the possibility of pollution to the river channel and at the same time allowing a further relatively sufficient cleaning of the muck in the pile hole.

[0060] Of course, in other embodiments, it is also possible to use two air compressors 3 to pulse and control the gas input to the inner side and the outer side of the slurry pipe 2, respectively, to achieve an alternating input of gas to the inner side and the outer side of the slurry pipe 2.

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

[0062] Referring to Figs. 5 and 7, an annular groove 423 is provided around the slurry pipe 2, and two side walls of the annular groove 423 parallel to the central axis are respectively provided with a mounting annular groove 425. Meanwhile, a rotary spray ring 43 is rotatably arranged around an opening edge of the annular groove 423, and the rotary spray ring 43 is sleeved on the slurry pipe 2. A connection ring 432 is fixedly and coaxially connected to the rotary spray ring 43, and the connection ring 432 is coaxially clamped and rotatably provided in the mounting annular groove 425. Two ends of the connection ring 432 in the axial direction are respectively provided with bearings, and one ends, away from each other, of the two bearings respectively abut against an inner wall of the mounting annular groove 425, so as to reduce the resistance for rotating the rotary spray ring 43 against the flow dividing ring 422.

[0063] Meanwhile, a plurality of spray holes 431 are formed at an inside of the rotary spray ring 43 to spray an air flow inside the annular groove 423 toward the inner wall of the pile hole. Specifically, the spray holes 431 first pass out of the rotary spray ring 43 in a direction away from a central axis of the flow dividing ring 422 along a path parallel to the central axis of the rotary spray ring 43, and outlets of the spray holes 431 are provided obliquely in a direction away from the flow dividing ring 422 and the outlet ports of the spray holes 431 are disposed in a direction offset from the central axis of the rotary spray ring 43 so that the rotary spray ring 43 can be urged to rotate relative to the flow dividing ring 422 when the spray holes 431 output air.

[0064] Further, in order to relatively sufficiently push the rotary spray ring 43 to rotate and reduce the resistance to the rotation, the rotary spray ring 43 protrudes along a radial direction of the rotary spray ring 43 at a position corresponding to an output end of the spray hole 431 and the protruded portion is annular, so as to increase a moment when the gas is output from the spray hole 431 and relatively sufficiently push the rotary spray ring 43 to rotate, and at the same time, the resistance of the slurry to the rotation of the rotary spray ring 43 during the rotation can be effectively reduced by the protruded arrangement compared with a direct use of a spray head.

[0065] Referring to Figs. 5 and 6, in addition, in order to make a seal between the rotary spray ring 43 and the flow dividing ring 422, reduce a significant resistance to the rotation of the rotary spray ring 43 due to the slurry or the like entering into the mounting annular groove 425, a sealing ring 424 made of a flexible material is fixedly connected to both an outer side edge and an inner side edge of the annular groove 423, and inner ring edges of both sealing rings 424 overlap the rotary spray ring 43. The sealing ring 424 is made of a flexible material, such as rubber, silica gel, etc. In use, since the rotary spray ring 43 is rotated to generate a pressure on an inner ring of the sealing ring 424 located at the inner side, and the slurry or the like at the outer side generates a pressure on the inner ring of the sealing ring 424 located at the outer side, the sealing ring 424 can be fitted to the rotary spray ring 43 under an external pressure to achieve a self-sealing effect and reduce the influence on the rotation of the rotary spray ring 43.

[0066] The implementation principle of embodiment 2 of the present disclosure is as follows: during the hole cleaning, the air compressor 3 alternately enables a high-pressure gas to respectively pass through the conduit 1 and the flow dividing pipe 421 via the control member 41, and during this process, the gas in the flow dividing pipe 421 enters the rotary spray ring 43 via the annular groove 423 and is sprayed out via the spray holes 431, so as to achieve the purpose of alternately injecting the gas at the inner side and the outer side of the slurry pipe 2, and at the same time, relatively sufficient scouring at the bottom of the pile hole can be achieved via the rotation of the rotary spray ring 43 itself, so that relatively sufficient cleaning of the muck in the pile hole can be achieved via the alternating scouring.

[0067] Of course, a one-way valve may also be provided at the outlet of the conduit 1 as well as at the outlet of the spray hole 431, depending on the alternating time, in order to reduce the possibility of back flow of slurry, in particular during hole cleaning.

[0068] The foregoing contents are preferred embodiments of the present disclosure, and are not intended to limit the scope of protection of the present disclosure. Any equivalent changes made according to the structure, shape and principle of the present disclosure are to be embraced within the scope of protection of the present disclosure.

Claims

1. A method for cleaning a pile hole of a cast-in-place pile of a ramp wharf of an inland river in a mountainous area by using an air compressor and a conduit, characterized by comprising steps of:SI, preliminary pile hole cleaning: applying pressure to slurry and inject the slurry into a pile hole and synchronously pumping out and filtering the slurry mixed with muck at bottom of the pile hole, transferring the muck, and injecting the filtered slurry into the pile hole again;S2, secondary pile hole cleaning: after a steel reinforcement cage is mounted in place, arranging a conduit (1) on an inner side of a slurry pipe (2) such that an outlet of the conduit (1) extends to the bottom of the pile hole and is lifted up by 20 cm, pumping out the slurry with the slurry pipe (2), sieving the muck in the slurry by a slurry separator, and the slurry flows back from an outer side of the slurry pipe (2) into the pile hole, and synchronously supplying air from an air compressor (3) to bottom of the slurry pipe (2) through the conduit (1) such that an interior of the slurry pipe (2) is in a negative pressure state;S3, repeating the step S2 until a content of the muck in the slurry in the pile hole meets a construction requirement.

2. The method for cleaning a pile hole of a cast-in-place pile of a ramp wharf of an inland river in a mountainous area by using an air compressor and a conduit according to claim 1, characterized in that, at least during a process of the slurry flowing back in step S2, the method further comprises: filling the pile hole with clear water to reduce a specific gravity of the slurry in the pile hole.

3. The method for cleaning a pile hole of a cast-in-place pile of a ramp wharf of an inland river in a mountainous area by using an air compressor and a conduit according to claim 1, characterized in that, the conduit (1) outputs air at intervals.

4. The method for cleaning a pile hole of a cast-in-place pile of a ramp wharf of an inland river in a mountainous area by using an air compressor and a conduit according to claim 1,characterized in that, the air is supplied into the pile hole through an outer side of the slurry pipe (2) and the conduit (1), and the air is supplied into the pile hole alternately through the outer side of the slurry pipe (2) and the conduit (1).

5. The method for cleaning a pile hole of a cast-in-place pile of a ramp wharf of an inland river in a mountainous area by using an air compressor and a conduit according to claim 4, characterized in that, an outlet of the air compressor (3) is provided with a flow dividing mechanism (4), the flow dividing mechanism (4) comprises a control member (41) and a flow dividing member (42) provided outside the bottom of the slurry pipe (2), the control member (41) is provided with one gas inlet (411) and two gas outlets (412), the gas inlet (411) is in communication with an outlet of the air compressor (3), one of the two gas outlets (412) is in communication with the conduit (1), and the other of the two gas outlets (412) is in communication with an input end of the flow dividing member (42), and an output end of the flow dividing member (42) is located at the bottom of the sluriy pipe (2), and the control member (41) is configured for controlling gas to alternately flow into the flow dividing member (42) and the conduit (1).

6. The method for cleaning a pile hole of a cast-in-place pile of a ramp wharf of an inland river in a mountainous area by using an air compressor and a conduit according to claim 5, characterized in that, the flow dividing member (42) comprises a flow dividing pipe (421) and a flow dividing ring (422), the flow dividing ring (422) is sleeved on and fixedly connected to the slurry pipe (2), two ends of the flow dividing pipe (421) are respectively in communication with one of output ends of the control member (41) and the flow dividing ring (422), the flow dividing ring (422) is provided with an annular groove (423) with a lower opening that is provided around the slurry pipe (2), and the annular groove (423) is in communication with the flow dividing pipe (421).

7. The method for cleaning a pile hole of a cast-in-place pile of a ramp wharf of an inland river in a mountainous area by using an air compressor and a conduit according to claim 6,characterized in that, a rotary spray ring (43) is rotatably arranged around an opening edge of the annular groove (423) , the rotary spray ring (43) is sleeved on the slurry pipe (2), the rotary spray ring (43) covers the annular groove (423), and the rotary spray ring (43) is provided with a plurality of spray holes (431) in communication with the annular groove (423), and a spray direction of each of the plurality of spray holes (431) is offset from a central axis of the rotary spray ring (43) and is configured for driving the rotary spray ring (43) to rotate.

8. The method for cleaning a pile hole of a cast-in-place pile of a ramp wharf of an inland river in a mountainous area by using an air compressor and a conduit according to claim 7, characterized in that, a sealing ring (424) made of a flexible material is fixedly connected to an edge of an outer side of the annular groove (423), and an inner side edge of the sealing ring (424) overlaps the rotary spray ring (43).

9. The method for cleaning a pile hole of a cast-in-place pile of a ramp wharf of an inland river in a mountainous area by using an air compressor and a conduit according to claim 7, characterized in that, an inner side wall and an outer side wall of the annular groove (423) parallel to the central axis of the rotary spray ring (43) are respectively formed with a mounting annular groove (425), and the rotary spray ring (43) is fixedly connected with a connection ring (432) rotatably provided on an inner side of the mounting annular groove (425).

10. The method for cleaning a pile hole of a cast-in-place pile of a ramp wharf of an inland river in a mountainous area by using an air compressor and a conduit according to claim 7, characterized in that, the rotary spray ring (43) protrudes along a radial direction of the rotary spray ring (43) at a position corresponding to an output end of the spray hole (431).

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