A device for cleaning the hole of a large-diameter bored cast-in-place pile and its using method

Abstract

The present application discloses a large-diameter bored cast-in-place pile hole cleaning device and its usage method, which relates to the technical field of bored pile hole cleaning. It includes a retaining wall cylinder embedded at the opening of the pile hole. A load-bearing ring plate is fixedly sleeved on the peripheral wall of the retaining wall cylinder. A bearing frame is erected at one end of the retaining wall cylinder far from the inner bottom wall of the pile hole, and a slurry pump is detachably fixed on the bearing frame. The slurry suction port of the slurry pump is detachably and fixedly connected to a slurry guide pipe. The length direction of the slurry guide pipe is arranged parallel to the length direction of the pile hole, and one end of the slurry guide pipe close to the inner bottom wall of the pile hole extends to the bottom of the pile hole where the drilling slag is located. A disturbance assembly for disturbing the drilling slag is arranged at one end of the slurry guide pipe located at the drilling slag. The slurry outlet of the slurry pump is connected to a slurry inlet pipe, and a sand removal mechanism is connected between the slurry outlet of the slurry pump and the slurry inlet pipe. The present application has the effect of improving the problems of high sediment content at the bottom of the hole and long construction period during the hole cleaning of large-diameter bored cast-in-place piles in complex geological conditions, resulting in low quality of the pile body of the bored cast-in-place pile.

Description

Technical Field

[0001] This application relates to the technical field of bored pile hole cleaning, and particularly to a large-diameter bored pile hole cleaning device and its usage method. Background Art

[0002] During the construction of bored piles, a drill is used to drill holes. After the drilling is completed, a large amount of drill cuttings will remain at the bottom of the pile hole. Currently, the drill cuttings at the bottom of the pile hole are often cleaned by directly sucking the drill cuttings or by mud circulation.

[0003] The mud circulation method includes positive circulation and reverse circulation. In positive circulation, circulating slurry is injected from inside the drill pipe. The mud descends along the drill pipe to the bottom of the pile hole, and the drill cuttings at the bottom of the pile hole rise with the mud to the top of the pile hole and are discharged into the mud pool. Some of the larger-sized drill cuttings precipitate in the mud pool. At the same time, the mud above the mud pool is pumped to the top of the drill pipe by a positive circulation pump, thus completing the process of mud circulation. In reverse circulation, a slurry pump is installed at the top of the drill pipe, and then the drill cuttings at the bottom of the pile hole are extracted through the drill pipe and discharged into the mud pool. At the same time, the mud in the mud pool is pumped to the top of the pile hole and injected into the pile hole by a reverse circulation pump, thereby replenishing the mud liquid level in the pile hole.

[0004] When constructing bridge piles, due to the large diameter of the bridge piles and the complex geology of the construction site, in order to construct the bridge piles on the bottom rock layer with high compressive strength, the drill needs to pass through the silt layer and sand layer during drilling, resulting in a high content of drill cuttings, sand, and gravel at the bottom of the pile hole. To ensure the drilling strength of the drill pipe, the wall thickness of the drill pipe is large during design, resulting in a small mud flow rate during hole cleaning in the pile, low hole cleaning efficiency, and an increase in sand leakage and hole collapse in the pile hole as the hole cleaning construction period increases, leading to low pile body quality of the bored pile. Moreover, during the mud circulation process, the natural precipitation effect of the sand and gravel in the mud in the sedimentation tank is not good, resulting in a high content of mud, sand, and sediment at the bottom of the pile hole. It is necessary to further increase the number of mud circulation times for hole cleaning to reduce the content of mud, sand, and sediment at the bottom of the pile hole to within the specified content.

[0005] When traditional mud circulation is used for hole cleaning of large-diameter bored piles with complex geological conditions, there are problems of high mud, sand, and sediment content at the bottom of the pile hole and an extended construction period, resulting in low pile body quality of the bored pile. Summary of the Invention

[0006] In order to improve the problems of high mud, sand, and sediment content at the bottom of the hole and an extended construction period leading to low pile body quality of the bored pile when cleaning the hole of large-diameter bored piles with complex geological conditions, this application provides a large-diameter bored pile hole cleaning device and its usage method.

[0007] In a first aspect, a large-diameter bored pile hole cleaning device provided by this application adopts the following technical solutions:

[0008] A hole cleaning device for large-diameter bored cast-in-place piles, including a retaining wall cylinder embedded at the opening of the pile hole. A load-bearing ring plate with a plate surface for abutting against the ground is fixedly sleeved on the peripheral wall of the retaining wall cylinder. A bearing frame is erected at one end of the retaining wall cylinder away from the inner bottom wall of the pile hole, and a slurry pump is detachably fixed on the bearing frame.

[0009] The slurry suction port of the slurry pump is detachably and fixedly connected to a slurry guide pipe. The length direction of the slurry guide pipe is arranged parallel to the length direction of the pile hole, and one end thereof close to the inner bottom wall of the pile hole extends to the bottom of the pile hole where the drill cuttings are located. A disturbance assembly for disturbing the drill cuttings is arranged at one end of the slurry guide pipe located at the drill cuttings.

[0010] The slurry outlet of the slurry pump is connected to a slurry inlet pipe for introducing slurry into the pile hole. A sand removal mechanism for separating sand and gravel in the slurry pumped by the slurry pump is connected between the slurry outlet of the slurry pump and the slurry inlet pipe.

[0011] By adopting the above technical solutions, when cleaning the drill cuttings at the bottom of the pile hole, the retaining wall cylinder and the load-bearing ring plate support the slurry pump and the slurry guide pipe. The slurry pump is started, and the slurry pump mixes and sucks the drill cuttings and slurry at the bottom of the pile hole through the slurry guide pipe. Then, the sand and gravel in the slurry are separated by the sand removal mechanism. Finally, the slurry separated from the sand and gravel is re-introduced into the pile hole through the slurry inlet pipe, reducing the sand content of the slurry flowing back into the pile hole. The slurry circulates in the pile hole, driving the disturbance assembly to disturb the drill cuttings at the bottom of the pile hole. On the one hand, the drill cuttings at the bottom of the pile hole are dispersed, and on the other hand, the agglomerated drill cuttings extracted are dispersed in the slurry, improving the carrying effect of the slurry on the drill cuttings. Since the slurry guide pipe does not need to bear the huge torque like a rotating rod during drilling, the corresponding inner diameter is enlarged, improving the extraction efficiency of the bottom drill cuttings. Combined with the disturbance assembly, the dispersion range of the drill cuttings at the bottom of the pile hole is increased, thereby improving the cleaning efficiency and effect of the drill cuttings with a large distribution diameter and a high sand and gravel content at the bottom of the large-diameter pile hole. Furthermore, it is possible to avoid the phenomenon of sand leakage or even collapse of the hole wall caused by an overly long construction period as much as possible, and improve the problem of low pile body quality of the cast-in-place pile caused by a high mud and sand content at the bottom of the hole and an extended construction period when cleaning the large-diameter cast-in-place pile in complex geological conditions.

[0012] Optionally, the sand removal mechanism includes a hydrocyclone with a feed inlet connected to the slurry outlet of the slurry pump, a vibrating screen for separating sand and water from the mortar at the sand outlet of the hydrocyclone, and a collection box. The collection box is used to collect the slurry at the slurry outlet of the hydrocyclone and the slurry and water screened by the vibrating screen, and the slurry inlet pipe is connected to the collection box.

[0013] By adopting the above technical solution, when the extracted mortar is desanded, the mortar enters the cyclone along the circumferential direction of the top of the cyclone. Under the action of the cyclone, the mud with smaller particles is discharged from the top of the cyclone into the collection box, and the mud with high sand and gravel content is discharged from the bottom of the cyclone into the vibrating screen. Under the action of the vibrating screen, the sand and gravel are discharged along the screen and piled on the ground. The slurry flows into the collection box through the mesh and mixes with the mud. Finally, the desanded mud flows into the pile hole through the slurry inlet pipe, thereby reducing the sand and gravel content in the mud, reducing the mud density, and improving the efficiency of the circulating mud in the pile hole to clean the drilling cuttings.

[0014] Optionally, the slurry guide pipe includes a short conduit connected and fixed to the slurry pump suction port, a concrete conduit threadedly connected to the short conduit, and a slurry suction pipe threadedly connected to the concrete conduit. There are multiple concrete conduits, and the multiple concrete conduits are threadedly connected. The disturbance component is arranged at one end of the slurry suction pipe away from the short conduit.

[0015] By adopting the above technical solution, on the one hand, the short guide tube, concrete guide tube and slurry extraction pipe are connected by threads when cleaning the hole, which is convenient for selecting the number of concrete guide tubes for pile holes of different depths, improving the convenience of installation while also improving the sealing effect between the pipes; on the other hand, after the hole is cleaned, the slurry pump is removed through the short guide tube and the concrete guide tube at the top, and concrete can be poured through the concrete guide tube at the top, thereby shortening the cycle between hole cleaning and concrete pouring, avoiding as much as possible the leakage of sand or even collapse of the inner wall of the pile hole caused by too long a cycle, and improving the quality of the cast-in-place pile body.

[0016] Optionally, a clamping ring is fixedly sleeved on the peripheral wall of the concrete conduit, and a clamping plate is slidably connected in the supporting frame for abutting the end face of the clamping ring close to the pile hole. There are two clamping plates, and arc grooves are provided on the sides of the two clamping plates close to each other. A first screw is rotatably connected to the supporting frame, and the first screw is threaded through the two clamping plates respectively, and the threads at both ends are rotated in opposite directions. A clamping drive part for driving the first screw to rotate is provided on the supporting frame. When the two clamping plates abut each other, the inner wall of the arc groove abuts against the peripheral wall of the concrete conduit.

[0017] By adopting the above technical solution, when the slurry pump needs to be installed, the slurry pump is hoisted to the bearing frame, and the slurry pump is driven to drive the concrete conduit to descend until the lower end face of the clamping ring is located at the plane where the upper surface of the clamping plate is located. Then, the clamping driving member is started, and the clamping driving member drives the first screw rod to rotate. The rotation of the first screw rod drives the two clamping plates to move towards each other until they abut against each other. At the same time, the concrete conduit slowly descends until the lower end face of the clamping ring abuts against the clamping plate. At this time, the inner wall of the arc-shaped groove of the clamping plate fits against the peripheral wall of the concrete conduit, thereby supporting the slurry pump and the short conduit and the slurry guiding pipe connected thereto. And during the process that the two clamping plates move synchronously and simultaneously to clamp the concrete conduit to complete the centering of the slurry guiding pipe, on the one hand, it is possible to avoid as much as possible the collapse of the sand and gravel on the inner wall of the pile hole caused by the swinging of the slurry pump and the slurry guiding pipe during the slag pumping process. On the other hand, the bearing effect on the slurry pump and the slurry guiding pipe is improved.

[0018] Optionally, two arc-shaped plates for supporting the concrete conduit are slidably arranged in the bearing frame. The arc-shaped plates are located on the side of the clamping plate close to the pile hole. The inner arc surface of the arc-shaped plate faces the concrete conduit. A buffer block for abutting against the concrete conduit is arranged on the inner arc surface of the arc-shaped plate. An elastic member is arranged on the side of the buffer block away from the concrete conduit. The buffer block is elastically connected to the arc-shaped plate through the elastic member. A driving assembly for driving the two arc-shaped plates to move towards each other is arranged on the bearing frame.

[0019] By adopting the above technical solution, when the concrete conduit needs to be supported, the driving assembly is used to drive the two arc-shaped plates to move towards each other until the buffer block moves to abut against the peripheral wall of the concrete conduit. Then, the two arc-shaped plates are continuously driven to move towards each other, and the buffer block compresses the elastic member. When the slurry carrying the drill cuttings is conveyed through the concrete conduit, the sand and gravel in the drill cuttings impact the inner wall of the concrete conduit, and the concrete conduit vibrates. At this time, the buffer block and the elastic member buffer the concrete conduit, avoiding as much as possible the damage caused by the vibration of the concrete conduit and improving the stability of the concrete conduit during the slurry extraction process.

[0020] Optionally, the driving assembly includes driving rods respectively fixed to the two arc-shaped plates, a second screw rod sequentially threaded through the two driving rods, and a pressing driving member for driving the second screw rod to rotate. The two driving rods are arranged parallel to each other. The second screw rod is rotatably connected to the bearing frame and the thread directions at both ends thereof are opposite.

[0021] By adopting the above technical solution, when it is necessary to drive the two arc-shaped plates to move towards each other, the pressing driving member is used to drive the second screw rod to rotate. The rotation of the second screw rod drives the two driving rods to move towards each other through the two ends with opposite thread directions, thereby driving the arc-shaped plates to move towards each other. At this time, under the action of thread self-locking, the stability of the arc-shaped plates is improved.

[0022] Optionally, the disturbance assembly includes a mounting ring threadedly connected to the slurry suction pipe and an elastic bag for containing a liquid having a density consistent with that of the initial slurry, and the elastic bag is closed.

[0023] By adopting the above technical solution, when the mud carrying drill cuttings circulates in the pile hole, under the combined action of the suction force of the slurry pump and the thrust of the mud sinking in the pile hole, on the one hand, the elastic bag installed on the slurry suction pipe through the mounting ring swings repeatedly, thereby disturbing the drill cuttings at the bottom of the pile hole and lifting the drill cuttings deposited at the bottom of the pile hole; on the other hand, the mud is stirred to improve the dispersion effect of the drill cuttings in the mud.

[0024] Optionally, one end of the elastic bag away from the mounting ring is connected to a counterweight block for driving the elastic bag to swing toward the direction close to the bottom wall of the pile hole.

[0025] By adopting the above technical solution, under the combined action of the suction force of the slurry pump and the thrust of the mud sinking, the elastic bag swings in an inclined state, and the counterweight block drives the elastic bag to swing back in the vertical direction, shortening the distance between the elastic bag and the drill cuttings below, and improving the effect of the elastic bag on disturbing the drill cuttings.

[0026] Optionally, both ends of the slurry pump are fixedly connected to end plates, and multiple steel bars are fixedly connected between the two end plates. One end of the steel bar is passed through the end plate located at the end of the slurry pump away from the slurry guide pipe, and the ends of the multiple steel bars away from the slurry guide pipe are inclined toward the extension line of the axis of the slurry guide pipe, and are fixedly connected at the mutual abutment points.

[0027] By adopting the above technical solution, when the slurry pump is lifted after being connected to the slurry guide pipe, the lifting rope is fixed to the fixed connection of multiple steel bars. The slurry pump bears the tension of the lifting rope through the end plate and the steel bars, thereby avoiding as much as possible the damage to the slurry pump caused by directly lifting the slurry pump due to the excessive weight of the slurry guide pipe, thereby improving the carrying capacity of the slurry pump when being lifted.

[0028] In the second aspect, the present application provides a method for using a large-diameter bored pile hole cleaning device using the following technical solutions:

[0029] A method for using a large-diameter bored pile hole cleaning device comprises the following steps:

[0030] S1: Pile hole wall protection, installing the wall protection tube and the load-bearing ring plate at the pile hole;

[0031] S2: slurrying, preparing the hole protection slurry in the pile hole, and stopping the slurrying when the slurry level in the pile hole rises to the opening of one end of the wall protection tube away from the bottom wall of the pile hole;

[0032] S3: Installation. First, determine the number of the concrete conduits and the lift height of the slime pump according to the depth of the pile hole. Then, connect the slime pump, the short conduit, several concrete conduits, the slurry suction pipe, the installation ring, the elastic capsule, and the counterweight in sequence.

[0033] Then, place the bearing frame on the retaining wall cylinder, hoist the slime pump above the pile hole through the steel bars and the end plate. The construction worker stands on the bearing frame and pulls the slurry suction pipe to align with the center of the pile hole, and lower the slime pump until the clamping ring on the concrete conduit is located at the clamping plate. Slowly lower the slime pump. When the clamping ring descends to the clamping plate, drive the arc-shaped groove of the clamping plate to abut against the peripheral wall of the concrete conduit through the clamping driving part, and stop lowering the slime pump. Drive the arc-shaped plate to drive the buffer block to support the concrete conduit through the tightening driving part.

[0034] Finally, install the sand removal mechanism on the ground, and connect the slurry outlet of the slime pump and the cyclone with a hose, and fix the outlet end of the slurry inlet pipe at the top opening of the retaining wall cylinder.

[0035] S4: Slag removal. First, start the vibrating screen, and then start the slime pump.

[0036] S5: Concrete pouring. After the drill slag at the bottom of the pile hole is cleaned up, separate the short conduit and the concrete conduit connected thereto, and then directly carry out concrete pouring through the concrete conduit.

[0037] By adopting the above technical solution, slurry is directly made in the pile hole and the slurry is circulated through the slime pump and the slurry guiding pipe, and the sand and gravel carried in the slurry are separated by the sand removal mechanism during the circulation process to clean the drill slag. On the one hand, the elastic capsule is used to improve the dispersion effect of the drill slag in the slurry, and combined with the sand removal mechanism, the cleaning efficiency and effect of the drill slag are improved compared with the sedimentation tank. On the other hand, slurry is directly made in the hole and sand is removed by the sand removal mechanism, eliminating the use of the sedimentation tank, improving the cleanliness of the construction site and the space utilization rate. In addition, after the drill slag in the pile hole is cleaned up, the short conduit and the slime pump are removed from the concrete conduit, and then concrete pouring can be directly started, shortening the time interval between the hole cleaning process and the concrete pouring process, reducing the amount of sand leakage on the inner wall of the pile hole after hole cleaning, shortening the construction period and improving the quality of the cast-in-place pile.

[0038] In summary, the present application includes at least one of the following beneficial technical effects:

[0039] 1. Because the grouting pipe does not need to bear the huge torque required by rotary rod drilling, the correspondingly enlarged inner diameter improves the extraction efficiency of the bottom drill cuttings. Combined with the disturbance component, the dispersion range of the drill cuttings at the bottom of the pile hole is increased, thereby improving the efficiency and effectiveness of cleaning the drill cuttings with large diameters and high sand and gravel content at the bottom of large-diameter pile holes. This minimizes sand leakage and even hole collapse caused by excessive construction periods. This also improves the problem of low pile quality caused by high sand content at the bottom of the hole and extended construction periods when cleaning large-diameter cast-in-place piles in complex geological conditions.

[0040] 2. Under the action of the cyclone, the mud with smaller particles is discharged from the top of the cyclone into the collection box, and the mud with high sand and gravel content is discharged from the bottom of the cyclone into the vibrating screen. Under the action of the vibrating screen, the sand and gravel are discharged along the screen and piled on the ground. The slurry flows through the mesh into the collection box and mixes with the mud. Finally, the mud after desanding flows into the pile hole through the slurry inlet pipe, thereby reducing the sand and gravel content in the mud, lowering the mud density, and improving the efficiency of the circulating mud in the pile hole to clean the drilling cuttings;

[0041] 3. Drill cuttings are cleaned by directly creating slurry in the pile hole and circulating the slurry through a slurry pump and slurry pipe. During the circulation process, the sand and gravel carried in the slurry are separated by a sand removal mechanism. On the one hand, the elastic bladder improves the dispersion of drill cuttings in the mud, and the sand removal mechanism improves the efficiency and effectiveness of drill cuttings cleaning compared to a sedimentation tank. On the other hand, creating slurry directly in the hole and removing sand through the sand removal mechanism eliminates the need for a sedimentation tank, improving the cleanliness of the construction site and space utilization. In addition, after the drill cuttings in the pile hole are cleaned, the short guide tube and slurry pump are removed from the concrete guide tube, and concrete pouring can be started directly. This shortens the time interval between the hole cleaning process and the concrete pouring process, reduces the amount of sand leaking from the inner wall of the pile hole after hole cleaning, shortens the construction period, and improves the quality of the bored piles. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0043] Figure 2 It is a structural schematic diagram used to show the sand removal mechanism, slurry inlet pipe, collection pipe and slurry inlet pump in Example 1 of the present application.

[0044] Figure 3 It is a structural schematic diagram used to display the slurry pump, end plate, steel bar, load-bearing frame, clamping plate, load-bearing plate, limit rod, first screw, clamping drive member, slurry guide pipe, clamping ring, drive assembly, disturbance assembly and counterweight block in Example 1 of the present application.

[0045] Figure 4 It is a structural schematic diagram used to show the slurry suction pipe, disturbance assembly, counterweight block and lifting ring in Example 1 of the present application.

[0046] Figure 5 It is a schematic structural diagram for showing the concrete conduit and the clamping ring in the first embodiment of the present application.

[0047] Figure 6 It is a cross-sectional view for showing the bearing frame, the bearing plate, the clamping plate, the limiting rod, the driving assembly, the arc-shaped plate, the elastic member, the buffer block and the first screw rod in the first embodiment of the present application.

[0048] Figure 7 It is a flowchart of the second embodiment of the present application.

[0049] Reference numerals: 1, retaining wall cylinder; 2, load-bearing ring plate; 3, sand removal mechanism; 31, cyclone; 32, vibrating screen; 33, collection box; 4, bearing frame; 5, slurry guide pipe; 51, short conduit; 52, concrete conduit; 53, slurry suction pipe; 6, driving assembly; 61, driving rod; 62, second screw rod; 63, pressing driving member; 7, slurry pump; 8, bearing plate; 9, disturbing assembly; 91, mounting ring; 92, elastic capsule; 10, clamping plate; 11, slurry inlet pump; 12, slurry inlet pipe; 13, collection pipe; 14, limiting rod; 15, counterweight; 16, end plate; 17, steel bar; 18, lifting ring; 19, clamping ring; 20, first screw rod; 21, clamping driving member; 22, arc-shaped plate; 23, elastic member; 24, buffer block; 25, arc-shaped groove. Detailed implementation manners

[0050] The following further elaborates on the present application in conjunction with the attached Figure 1-7 for a more detailed description.

[0051] The embodiment of the present application discloses a large-diameter bored cast-in-place pile hole cleaning device and its usage method.

[0052] Embodiment 1

[0053] The first embodiment of the present application discloses a large-diameter bored cast-in-place pile hole cleaning device.

[0054] Refer to Figure 1 , Figure 2 and Figure 3, A device for cleaning the hole of a large-diameter bored cast-in-place pile includes a retaining wall cylinder 1 embedded at the opening of the pile hole. A load-bearing ring plate 2 with a plate surface for abutting against the ground is fixedly sleeved on the peripheral wall of the retaining wall cylinder 1. When the retaining wall cylinder 1 is inserted into the pile hole, the load-bearing ring plate 2 closely adheres to the ground, and at this time, the upper end of the retaining wall cylinder 1 extends outside the pile hole. A bearing frame 4 is erected at one end of the retaining wall cylinder 1 away from the bottom wall of the pile hole. The bearing frame 4 is formed by welding I-beams end to end, and a slurry pump 7 is detachably fixed on the bearing frame 4; a slurry suction port of the slurry pump 7 is detachably and fixedly connected to a guide slurry pipe 5. The length direction of the guide slurry pipe 5 is arranged parallel to the length direction of the pile hole, and one end thereof close to the bottom wall of the pile hole extends to the bottom of the pile hole where the drill cuttings are located. A disturbing component 9 for disturbing the drill cuttings is arranged at one end of the guide slurry pipe 5 located at the drill cuttings. A slurry inlet pipe 12 for feeding slurry into the pile hole is connected to the slurry outlet of the slurry pump 7, and a sand removal mechanism 3 for separating the sand and gravel in the slurry pumped by the slurry pump 7 is connected between the slurry outlet of the slurry pump 7 and the slurry inlet pipe 12.

[0055] Before cleaning the drill cuttings in the pile hole, first connect the slurry pump 7 and the guide slurry pipe 5 and make slurry in the pile hole until the slurry rises to a position close to the bearing frame 4 at the top of the retaining wall cylinder 1. Then hoist the slurry pump 7 and the guide slurry pipe 5 into the pile hole and fix the slurry pump 7 on the retaining wall cylinder 1. Finally, start the slurry pump 7. The slurry pump 7 pumps the drill cuttings at the bottom of the pile hole through the slurry to the sand removal mechanism 3 for cleaning the sand and gravel, and finally feeds the slurry with the sand and gravel removed into the pile hole through the slurry inlet pipe 12 to form a slurry circulation. During the slurry circulation process, the disturbing component 9 disturbs the drill cuttings at the bottom of the pile hole to improve the dispersion effect of the drill cuttings in the slurry.

[0056] For cleaning the sand and gravel in the slurry, refer to Figure 2 , The sand removal mechanism 3 includes a hydrocyclone 31 with a feed inlet connected to the slurry outlet of the slurry pump 7, a vibrating screen 32 for separating the sand and water from the mortar at the sand outlet of the hydrocyclone 31, and a collection box 33. The collection box 33 is placed on the ground and has an opening at the top. The vibrating screen 32 is fixed above the collection box 33 and its sieve plate is aligned with the opening of the collection box 33. The hydrocyclone 31 is obliquely fixed on the side of the vibrating screen 32 close to the pile hole, and its sand outlet is arranged above the sieve plate of the vibrating screen 32 and faces the vibrating screen 32. The slurry outlet of the slurry pump 7 is connected to the feed inlet on the peripheral side above the hydrocyclone 31 through a hose. A collection pipe 13 is fixedly connected to the slurry outlet at one end of the hydrocyclone 31 away from the sand outlet, and the collection pipe 13 guides the slurry with the sand and gravel separated into the collection box 33. To facilitate the collection box 33 to convey slurry into the pile hole, a slurry inlet pump 11 is fixedly connected to the bottom of the collection box 33, and the slurry inlet pipe 12 is connected to the collection box 33 through the slurry inlet pump 11.

[0057] When the mud extracted by the slurry pump 7 is transported to the cyclone 31, the sand and gravel part of the mud falls from the sand outlet of the cyclone 31 onto the sieve plate of the vibrating screen 32, and the mud part flows from the mud outlet of the cyclone 31 into the collection box 33 through the collection pipe 13; under the action of the vibrating screen 32, the water in the sand and gravel is separated from the sand and gravel, and the sand and gravel move along the sieve plate to the outside of the vibrating screen 32 and are piled on the ground, and the water passes through the sieve plate and falls into the collection box 33 to mix with the mud; finally, the mud in the collection box 33 is input into the pile hole from above the wall protection tube 1 through the slurry inlet pipe 12 under the action of the slurry inlet pump 11.

[0058] Before installing the slurry pump 7 on the bearing frame 4, the slurry pump 7 and the slurry guide pipe 5 need to be connected together. In order to avoid the slurry pump 7 and the slurry guide pipe 5 from being damaged during the hoisting, refer to Figure 3 , both ends of the slurry pump 7 are fixedly connected to a rectangular end plate 16, and a plurality of steel bars 17 are fixedly connected between the two end plates 16. In the embodiment of the present application, four steel bars 17 are provided, and the four steel bars 17 are respectively located at the four corners of the end plates 16. In order to facilitate the setting of the lifting point, the four steel bars 17 are fixedly connected to the end plate 16 at one end close to the slurry guide pipe 5, and the other end is passed through the end plate 16 at the end of the slurry pump 7 away from the slurry guide pipe 5. The ends of the four steel bars 17 away from the slurry guide pipe 5 are all inclined in the direction of the extension line of the axis of the slurry guide pipe 5 and are welded at the joints. When the slurry pump 7 and the slurry guide pipe 5 need to be hoisted, the joints of the four steel bars 17 can be lifted.

[0059] Before cleaning the hole, the slurry pipe 5 and the slurry pump 7 need to be installed. Figure 3 The slurry guide pipe 5 includes a short pipe 51 connected to the slurry extraction port of the slurry pump 7, a concrete pipe 52 threadedly connected to the short pipe 51, and a slurry extraction pipe 53 threadedly connected to the concrete pipe 52. There are multiple concrete pipes 52. In the embodiment of the present application, there are two concrete pipes 52, and their length is two meters. The two concrete pipes 52 are threadedly connected. In other embodiments, the number of concrete pipes 52 can be adaptively adjusted according to the depth of the pile hole, and can be five, ten, or fifteen. In the embodiment of the present application, the length of the slurry extraction pipe 53 is set to four meters to avoid as much as possible that the slurry extraction pipe 53 is buried in the concrete during the subsequent concrete pouring, which reduces the quality of the concrete when it is removed.

[0060] Reference Figure 4, the disturbing component 9 is arranged at one end of the slurry extraction pipe 53 far away from the short conduit 51. In the embodiment of the present application, the disturbing component 9 includes a mounting ring 91 threadedly connected to the slurry extraction pipe 53 and an elastic capsule 92 for containing a liquid with the same density as the initial slurry, and the elastic capsule 92 is hermetically arranged. Specifically, the elastic capsule 92 is arranged in a strip shape, there are four elastic capsules 92, and the four elastic capsules 92 are evenly distributed along the circumference of the mounting ring 91 and are suspended on the mounting ring 91 through suspension rings 18. When making slurry for the pile hole, slurry liquid is filled in the elastic capsule 92.

[0061] In other embodiments, the disturbing component 9 includes a flexible net and a spring. The flexible net surface is in a cylindrical shape and one end of it is fixedly wound along the circumferential wall of the slurry extraction pipe 53. The spring is suspended at the end of the flexible net far away from the slurry extraction pipe 53 and its head and tail are connected. On the one hand, under the action of gravity, the spring drives the flexible net to move towards the direction close to the drill cuttings. On the other hand, during the process of slurry circulation, under the impact of sand and gravel, the spring drives the end of the flexible net far away from the slurry extraction pipe 53 to contract, thereby disturbing the drill cuttings and the slurry and improving the dispersion effect of the drill cuttings in the slurry.

[0062] To further improve the disturbing effect of the elastic capsule 92 on the drill cuttings, refer to Figure 4 , a counterweight 15 for driving the elastic capsule 92 to swing towards the direction close to the bottom wall of the pile hole is connected to the end of the elastic capsule 92 far away from the mounting ring 91. The counterweight 15 is arranged as a steel ball, and it is suspended at the end of the elastic capsule 92 far away from the mounting ring 91 through a suspension ring 18.

[0063] After connecting the slurry pump 7 with the guide slurry pipe 5, it is necessary to hoist the guide slurry pipe 5 into the pile hole. To fix the slurry pump 7 on the bearing frame 4, refer to Figure 3 , Figure 5 and Figure 6 , a clamping ring 19 is fixedly sleeved on the circumferential wall of the concrete conduit 52. A clamping plate 10 for abutting against the end face of the clamping ring 19 close to the pile hole is slidably connected in the bearing frame 4. Arc-shaped grooves 25 are formed on the side faces of the two clamping plates 10 close to each other. A first screw rod 20 is rotatably connected to the bearing frame 4. The first screw rod 20 respectively threadedly penetrates through the two clamping plates 10, and the thread directions at both ends of it are opposite. A clamping driving member 21 for driving the first screw rod 20 to rotate is arranged on the bearing frame 4. When the two clamping plates 10 abut against each other, the inner wall of the arc-shaped groove 25 abuts against the circumferential wall of the concrete conduit 52. In the embodiment of the present application, the clamping driving member 21 is arranged as a first rotating motor, and the output end of the first rotating motor is coaxially fixed with the first screw rod 20. In other embodiments, the clamping driving member 21 can also be arranged as a corrugated hand wheel coaxially fixed with the first screw rod 20.

[0064] Furthermore, to facilitate the downward movement of the concrete conduit 52 as the thickness of the drill cuttings decreases during the hole cleaning process, refer to Figure 5, a plurality of clamping rings 19 are provided on the concrete conduit 52, and the plurality of clamping rings 19 are arranged on the concrete conduit 52 at intervals along the length direction of the concrete conduit 52. In the embodiment of the present application, two clamping rings 19 are provided on one concrete conduit 52. When starting to clean the hole, select a suitable clamping ring 19 to fix the concrete conduit 52 and the slurry pump 7 according to the detected thickness of the drilling slag, and reserve a spare clamping ring 19 above it. Judge the reduction rate of the thickness of the drilling slag by the speed of separating sand and gravel on the sieve plate of the vibrating screen 32. When the speed of separating sand and gravel on the sieve plate drops significantly, lift the slurry pump 7, release the fixed support of the concrete conduit 52 through the clamping driving member 21, and then lower the slurry pump 7 and the concrete conduit 52 to the position of the spare clamping ring 19, and then fix the concrete conduit 52, thereby improving the cleaning efficiency of the drilling slag.

[0065] During the process of cleaning the drilling slag, since the sand and gravel in the drilling slag are pumped out through the concrete conduit 52 along with the slurry, the impact of the sand and gravel on the concrete conduit 52 causes the concrete conduit 52 to vibrate. To facilitate buffering the vibration of the concrete conduit 52, refer to Figure 6 , two arc-shaped plates 22 for supporting the concrete conduit 52 are slidably arranged in the bearing frame 4. The arc-shaped plates 22 are located on the side of the clamping plate 10 close to the pile hole, and the inner arc surfaces of the arc-shaped plates 22 face the concrete conduit 52. When the two arc-shaped plates 22 are in contact with each other, they are combined into a circular ring. A buffer block 24 for abutting against the concrete conduit 52 is arranged on the inner arc surface of the arc-shaped plate 22. An elastic member 23 is arranged on the side of the buffer block 24 away from the concrete conduit 52. The buffer block 24 is elastically connected to the arc-shaped plate 22 through the elastic member 23. A driving assembly 6 for driving the two arc-shaped plates 22 to move towards each other is arranged on the bearing frame 4. Specifically, the buffer block 24 is made of a damping material and is arc-shaped, and its outer arc surface faces the inner arc surface of the arc-shaped plate 22. Three buffer blocks 24 are arranged, and the three buffer blocks 24 are evenly arranged along the circumferential direction of the inner arc surface of the arc-shaped plate 22. The elastic member 23 can be a spring or an elastic telescopic cylinder. In the embodiment of the present application, the elastic member 23 is preferably a spring. One end of the spring is fixedly connected to the inner arc surface of the arc-shaped plate 22, and the other end is fixedly connected to the outer arc surface of the buffer block 24.

[0066] To facilitate driving the two arc-shaped plates 22 to move towards each other, refer to Figure 6, in the embodiment of the present application, the driving assembly 6 includes a driving rod 61 respectively fixed to the two arc-shaped plates 22, a second screw rod 62 sequentially threaded through the two driving rods 61, and a pressing driving member 63 for driving the second screw rod 62 to rotate. The two driving rods 61 are arranged parallel to each other. The length direction of the second screw rod 62 is arranged along the width direction of the bearing frame 4. The second screw rod 62 is rotatably connected to the bearing frame 4 and the thread directions at both ends are opposite. A limiting rod 14 is fixedly connected to the middle of the outer arc surface of the arc-shaped plate 22. The length direction of the limiting rod 14 is arranged along the width direction of the bearing frame 4, and its cross section is rectangular. The limiting rod 14 is slidably inserted through the peripheral wall of the bearing frame 4. The driving rod 61 is fixed to the limiting rod 14 along the length direction of the bearing frame 4. The ends of the two driving rods 61 away from the limiting rod 14 connected thereto are respectively threadedly connected to the two ends with opposite thread directions of the second screw rod 62. The pressing driving member 63 can be a second rotating motor, a servo motor or a corrugated handwheel. In the present application, the pressing driving member 63 is set as the second rotating motor, and the output end of the second rotating motor is coaxially fixed to the second screw rod 62.

[0067] When it is necessary to drive the two arc-shaped plates 22 to move towards each other or away from each other, start the second rotating motor. The second rotating motor drives the second screw rod 62 to rotate. The rotation of the second screw rod 62 drives the driving rods 61 to move towards each other or away from each other, so as to drive the two arc-shaped plates 22 to move towards or away from each other along the width direction of the bearing frame 4 through the limiting rod 14. When the two arc-shaped plates 22 are in contact with each other, the two arc-shaped plates 22 are combined into a circular ring. At this time, the spring presses the buffer block 24 against the peripheral wall of the concrete conduit 52.

[0068] For the convenience of construction workers to stand on the bearing frame 4 for operation, refer to Figure 6 , bearing plates 8 are hinged at both ends of the bearing frame 4. When the two clamping plates 10 move towards each other to contact the concrete conduit 52, rotate the bearing plates 8 to overlap on the upper surface of the bearing frame 4, so as to shield both ends of the bearing frame 4.

[0069] The implementation principle of the first embodiment of the present application, a large-diameter bored pile hole cleaning device is: before making slurry in the pile hole, insert the protection cylinder 1 into the top of the pile hole and connect the guide slurry pipe 5 and the slag slurry pump 7.

[0070] When making slurry in the pile hole until the slurry rises to the top of the retaining wall cylinder 1, place the bearing frame 4 on the retaining wall cylinder 1. Then, hoist and lower the slurry pump 7 and the slurry guide pipe 5 through the steel bars 17 and the pressing plate until the counterweight 15 at the bottom of the slurry pump 7 reaches the position of the drilling slag. Then, start the first rotating motor, which drives the two clamping plates 10 to move towards each other until they abut against the circumferential wall of the concrete conduit 52. At this time, the two clamping plates 10 abut against the lower surface of the clamping ring 19. Finally, start the second rotating motor, which drives the two arc-shaped plates 22 to move towards each other until they abut against each other. At this time, the buffer block 24 abuts against the circumferential wall of the concrete conduit 52, and the spring is in a compressed state. After the slurry pump 7 is installed, connect the slurry outlet of the slurry pump 7 and the feed inlet of the cyclone 31 through a hose, and fix the slurry inlet pipe 12 at the upper opening of the retaining wall cylinder 1.

[0071] Start the slurry pump 7, and the slurry in the pile hole carries the drilling slag and is pumped through the slurry guide pipe 5 and the hose to the feed inlet of the cyclone 31. The slurry outlet at the top of the cyclone 31 transports the separated slurry into the collection box 33. At the same time, its sand removal outlet feeds the mortar into the vibrating screen 32. The vibrating screen 32 separates the sand and gravel from the slurry, and the slurry passes through the sieve plate and flows into the collection box 33. When the slurry in the collection box 33 accumulates, then start the slurry inlet pump 11 to feed the slurry in the collection box 33 into the pile hole through the slurry inlet pipe 12, forming a slurry circulation in the pile hole. During the slurry circulation process, the elastic bladder 92 and the counterweight 15 disturb the slurry and the bottom drilling slag, thereby improving the dispersion effect of the drilling slag in the slurry.

[0072] Embodiment 2

[0073] The second embodiment of the present application discloses a method for using a large-diameter bored cast-in-place pile hole cleaning device.

[0074] Refer to Figure 7 , a method for using a large-diameter bored cast-in-place pile hole cleaning device includes the following steps:

[0075] S1: Pile hole retaining wall. Install the retaining wall cylinder 1 and the load-bearing ring plate 2 at the pile hole. First, clean and level the ground at the pile hole orifice, then hoist the retaining wall cylinder 1 fixed with the load-bearing ring plate 2 to the pile hole orifice, and lower the retaining wall cylinder 1 into the pile hole until the load-bearing ring plate 2 abuts against the ground.

[0076] S2: Slurry making. Make the hole-protecting slurry in the pile hole, and stop making slurry when the height of the slurry in the pile hole rises to the opening at one end of the retaining wall cylinder 1 away from the inner bottom wall of the pile hole.

[0077] S3: Installation. First, determine the number of concrete conduits 52 and the lift of the slurry pump 7 according to the depth of the pile hole, and then connect the slurry pump 7, the short conduit 51, several concrete conduits 52, the slurry extraction pipe 53, the installation ring 91, the elastic bladder 92 and the counterweight 15 in sequence.

[0078] Then, place the bearing frame 4 on the retaining wall cylinder 1, hoist the slurry pump 7 above the pile hole through the steel bars 17 and the end plate 16. The construction workers stand on the bearing frame 4 and pull the slurry suction pipe 53 to align it with the center of the pile hole, and lower the slurry pump 7 until the clamping ring 19 on the concrete conduit 52 is located at the clamping plate 10. At this time, a spare clamping ring 19 for the subsequent descent of the concrete conduit 52 is reserved above the concrete conduit 52. Then, slowly lower the slurry pump 7. When the clamping ring 19 descends to the clamping plate 10, start the first rotating motor to drive the arc groove 25 of the clamping plate 10 to abut against the peripheral wall of the concrete conduit 52, stop lowering the slurry pump 7, and start the second rotating motor to drive the arc plate 22 to drive the buffer block 24 to support the concrete conduit 52.

[0079] Finally, install the sand removal mechanism 3 on the ground, and connect the slurry outlet of the slurry pump 7 and the hydrocyclone 31 with a hose, and fix the outlet end of the slurry inlet pipe 12 at the top opening of the retaining wall cylinder 1.

[0080] S4: Desanding. First, start the vibrating screen 32, and then start the slurry pump 7. The slurry pump 7 extracts the drill cuttings at the bottom of the pile hole through the concrete conduit 52 and the slurry suction pipe 53. When the slurry is pumped into the hydrocyclone 31, the slurry level in the pile hole is not lower than the lowest end of the retaining wall cylinder 1. At this time, the slurry is desanded through the hydrocyclone 31 and the vibrating screen 32, and enters the pile hole through the slurry inlet pipe 12 to start the slurry circulation.

[0081] In order to lower the concrete conduit 52 as the thickness of the drill cuttings at the bottom of the pile hole decreases, observe the discharge speed of the separated sand and gravel at the vibrating screen 32, so as to judge the cleaning condition of the drill cuttings at the bottom of the pile hole. When the discharge speed of the sand and gravel at the vibrating screen 32 significantly slows down, use a crane to hoist the steel bar 17 on the slurry pump 7, start the second rotating motor to release the abutment of the buffer block 24 and the concrete conduit 52, start the first rotating motor to drive the two clamping plates 10 to move away from each other, then drive the slurry pump 7 and the concrete conduit 52 to descend to the alignment position of the spare clamping ring 19 and the clamping plate 10, and finally drive the clamping plate 10 and the buffer block 24 to abut against the peripheral wall of the concrete conduit 52 again. Furthermore, when the distance between the bottom end of the slurry suction pipe 53 and the drill cuttings increases, the bottom end of the slurry suction pipe 53 is lowered to the drill cuttings again, and the distance between the disturbance assembly 9 and the drill cuttings is shortened, improving the efficiency of cleaning the drill cuttings.

[0082] S5: Concrete pouring. After the drill cuttings at the bottom of the pile hole are cleaned, the short pipe 51 is separated from the connected concrete pipe 52, and then concrete pouring is carried out directly through the concrete pipe 52. Specifically, the slurry pump 7 and the short pipe 51 are lifted off the concrete pipe 52, and a funnel is threadedly connected to the end of the concrete pipe 52 away from the bottom wall of the pile hole. Concrete is then poured from the funnel into the concrete pipe 52, thereby pouring the concrete into the pile hole through the concrete pipe 52 and the slurry extraction pipe 53. During the pouring process, the concrete pipe 52 is lifted as the concrete rises and fixed to the support frame 4 via the clamping plate 10. The redundant concrete pipes 52 are then removed to complete the concrete pouring process.

[0083] After the drilling debris at the bottom of the pile hole is cleaned, the short guide tube 51 and the slurry pump 7 are removed and the concrete pouring can be carried out, which greatly shortens the time period between the hole cleaning process and the concrete pouring process, and avoids as much as possible the need to replace and debug equipment after the hole cleaning is completed, thereby extending the construction period and causing the pile hole inner wall to collapse and leak sand, thereby avoiding as much as possible the situation that the sand content in the mud after cleaning increases and the quality of the poured concrete pile is reduced.

[0084] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A hole cleaning device for large-diameter bored cast-in-place piles, characterized in that: It includes a retaining wall cylinder (1) embedded at the opening of the pile hole. A load-bearing ring plate (2) with a plate surface for abutting against the ground is fixedly sleeved on the peripheral wall of the retaining wall cylinder (1). A bearing frame (4) is erected at one end of the retaining wall cylinder (1) away from the inner bottom wall of the pile hole. A slurry pump (7) is detachably fixed on the bearing frame (4); The slurry suction port of the slurry pump (7) is detachably fixedly communicated with a slurry guide pipe (5). The length direction of the slurry guide pipe (5) is arranged parallel to the length direction of the pile hole, and one end thereof close to the inner bottom wall of the pile hole extends to the bottom of the pile hole where the drilling slag is located. A disturbance assembly (9) for disturbing the drilling slag is arranged at one end of the slurry guide pipe (5) located at the drilling slag; The slurry outlet of the slurry pump (7) is communicated with a slurry inlet pipe (12) for introducing slurry into the pile hole. A sand removal mechanism (3) for separating the sand and gravel in the slurry pumped by the slurry pump (7) is communicated between the slurry outlet of the slurry pump (7) and the slurry inlet pipe (12); The slurry guide pipe (5) includes a short conduit (51) fixedly connected to the slurry suction port of the slurry pump (7), a concrete conduit (52) threadedly connected to the short conduit (51), and a slurry suction pipe (53) threadedly connected to the concrete conduit (52). A plurality of the concrete conduits (52) are threadedly connected. The disturbance assembly (9) is arranged at one end of the slurry suction pipe (53) away from the short conduit (51); The disturbance assembly (9) includes a mounting ring (91) threadedly connected to the slurry suction pipe (53) and an elastic capsule (92) for containing a liquid with the same density as the initial slurry. The elastic capsule (92) is hermetically arranged.

2. The hole cleaning device for large-diameter bored cast-in-place piles according to claim 1, characterized in that: The sand removal mechanism (3) includes a hydrocyclone (31) with a feed inlet communicated with the slurry outlet of the slurry pump (7), a vibrating screen (32) for separating the sand and water of the mortar at the sand outlet of the hydrocyclone (31), and a collection box (33). The collection box (33) is used for collecting the slurry at the slurry outlet of the hydrocyclone (31) and the slurry water screened by the vibrating screen (32). The slurry inlet pipe (12) is communicated with the collection box (33).

3. The hole cleaning device for large-diameter bored cast-in-place piles according to claim 2, wherein: A clamping ring (19) is fixedly sleeved on the peripheral wall of the concrete conduit (52). A clamping plate (10) for abutting against the end face of the clamping ring (19) close to the pile hole is slidably connected in the bearing frame (4). There are two clamping plates (10). Arc-shaped grooves (25) are formed on the side surfaces of the two clamping plates (10) close to each other. A first screw rod (20) is rotatably connected to the bearing frame (4). The first screw rod (20) threadedly penetrates through the two clamping plates (10) respectively, and the thread directions at both ends thereof are opposite. A clamping driving member (21) for driving the first screw rod (20) to rotate is arranged on the bearing frame (4). When the two clamping plates (10) abut against each other, the inner wall of the arc-shaped groove (25) abuts against the peripheral wall of the concrete conduit (52).

4. The hole cleaning device for large-diameter bored cast-in-place piles according to claim 3, wherein: Two arc-shaped plates (22) for supporting the concrete conduit (52) are slidably arranged in the bearing frame (4). The arc-shaped plates (22) are located on the side of the clamping plate (10) close to the pile hole. The inner arc surface of the arc-shaped plate (22) faces the concrete conduit (52). A buffer block (24) for abutting against the concrete conduit (52) is arranged on the inner arc surface of the arc-shaped plate (22). An elastic member (23) is arranged on the side of the buffer block (24) away from the concrete conduit (52). The buffer block (24) is elastically connected to the arc-shaped plate (22) through the elastic member (23). A driving assembly (6) for driving the two arc-shaped plates (22) to move towards each other is arranged on the bearing frame (4).

5. The hole cleaning device for large-diameter bored cast-in-place piles according to claim 4, characterized in that: The driving assembly (6) includes driving rods (61) respectively fixed to the two arc-shaped plates (22), a second screw rod (62) sequentially threaded through the two driving rods (61), and a pressing driving member (63) for driving the second screw rod (62) to rotate. The two driving rods (61) are arranged parallel to each other. The second screw rod (62) is rotatably connected to the bearing frame (4) and the thread directions at both ends are opposite.

6. The hole cleaning device for large-diameter bored cast-in-place piles according to claim 5, wherein: A counterweight block (15) for driving the elastic capsule (92) to swing towards the inner bottom wall of the pile hole is connected to one end of the elastic capsule (92) away from the mounting ring (91).

7. The hole cleaning device for large-diameter bored cast-in-place piles according to claim 6, wherein: End plates (16) are fixedly connected to both ends of the slurry pump (7). A plurality of steel bars (17) are fixedly connected between the two end plates (16). One end of the steel bar (17) penetrates through the end plate (16) at the end of the slurry pump (7) away from the slurry guide pipe (5). The ends of the plurality of steel bars (17) away from the slurry guide pipe (5) are all inclined towards the extension direction of the axis of the slurry guide pipe (5) and are fixedly connected at the abutting positions.

8. A method for using a hole cleaning device for large-diameter bored cast-in-place piles, the hole cleaning device for large-diameter bored cast-in-place piles according to claim 7, characterized in that: Including the following steps: S1: Pile hole wall protection. Install the retaining wall cylinder (1) and the load-bearing ring plate (2) at the pile hole. S2: Slurry making. Manufacture the hole protection slurry in the pile hole and stop slurry making when the slurry height in the pile hole rises to the opening at one end of the retaining wall cylinder (1) away from the inner bottom wall of the pile hole. S3: Installation. First, determine the number of the concrete conduits (52) and the lift of the slurry pump (7) according to the pile hole depth, and then sequentially connect the slurry pump (7), the short conduit (51), several concrete conduits (52), the slurry extraction pipe (53), the mounting ring (91), the elastic capsule (92) and the counterweight block (15). Then, place the bearing frame (4) on the retaining wall cylinder (1), hoist the slurry pump (7) above the pile hole through the steel bars (17) and the end plate (16). The construction worker stands on the bearing frame (4) and pulls the slurry suction pipe (53) to align with the center of the pile hole, and lower the slurry pump (7) until the clamping ring (19) on the concrete conduit (52) is located at the clamping plate (10). Slowly lower the slurry pump (7). When the clamping ring (19) descends to the clamping plate (10), drive the arc-shaped groove (25) of the clamping plate (10) to abut against the peripheral wall of the concrete conduit (52) through the clamping driving member (21), stop lowering the slurry pump (7), and drive the arc-shaped plate (22) to drive the buffer block (24) to support the concrete conduit (52) through the pressing driving member (63); Finally, install the sand removal mechanism (3) on the ground, and connect the slurry outlet of the slurry pump (7) to the cyclone (31) with a hose, and fix the outlet end of the slurry inlet pipe (12) at the top opening of the retaining wall cylinder (1); S4: Desanding, first start the vibrating screen (32), and then start the slurry pump (7); S5: Concrete pouring, after the drill cuttings at the bottom of the pile hole are cleared, separate the short conduit (51) from the concrete conduit (52) connected thereto, and then directly conduct concrete pouring through the concrete conduit (52).

Images