Cast-in-place large-diameter tubular pile construction equipment for slurry extraction and construction method thereof

Abstract

The invention discloses cast-in-place large-diameter tubular pile construction equipment for mud extraction and a construction method thereof, and belongs to the technical field of pile foundation construction, the cast-in-place large-diameter tubular pile construction equipment comprises a walking system, a chassis, a mast, a main winch, an auxiliary winch, an auxiliary winch, a power head, an external vibration exciter, an internal vibration exciter, a spiral structure, an outer sleeve, an inner sleeve, a fluid director, a channel A, a channel B and a channel C; the power head is connected with the main winch through a steel strand, the spiral structure is connected with the power head, the external vibration exciter is installed on the outer side of the upper portion of the outer sleeve, and the internal vibration exciter is installed on the inner side of the upper portion of the inner sleeve and connected with the auxiliary winch through a steel strand. The method comprises the following specific construction steps: measuring a pile placement position; drilling construction is conducted; lifting up the spiral structure; shifting the equipment; inserting a reinforcement cage and pouring concrete; pulling out the inner sleeve; pulling out the outer sleeve; and backfilling concrete. The technical problems that in hard soil area construction, vibration die sinking resistance is large, equipment is overloaded, and the pile end is not sealed tightly are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of pile foundation construction, and in particular to a mud extraction cast-in-place large-diameter pipe pile construction device and a construction method thereof. Background Art

[0002] Cast-in-place concrete large-diameter pipe piles (referred to as cast-in-place large-diameter pipe piles) use vibration to sink a double-layer steel casing cavity structure (pile form) into the foundation's designed depth, protected by a closed flap pile shoe. Concrete is evenly injected into the structure through a concrete diverter. The cavity is then vibrated out, and the flap pile shoe automatically separates as the cavity is pulled out. Concrete is then injected into the annular groove formed by the pullout, forming the cast-in-place large-diameter pipe pile. Cast-in-place large-diameter pipe piles typically have an outer diameter of 1.0 to 1.5 meters, a wall thickness of 10 to 15 centimeters, and can be driven to a depth of 20 to 30 meters. Cast-in-place large-diameter pipe piles achieve high bearing capacity with a low concrete consumption, making them an economical and cost-effective pile type. This technology has been successfully applied in large-scale soft foundation treatment projects such as highways and high-speed railways.

[0003] At present, cast-in-place large-diameter pipe piles are mainly used in soft soil areas. The current equipment and technology are not suitable for construction in hard soil layers. The main reasons are as follows: (1) Large resistance to vibration sinking: Hard soil layers have high shear strength, and the excitation force required for vibration sinking pipes increases significantly, which can easily lead to slow sinking speed or even failure to reach the designed depth; (2) Equipment overload: More powerful vibration equipment is required, but long-term high-load operation will accelerate mechanical wear and increase the risk of failure; (3) Pile end sealing is not tight: The flap pile shoe may not be fully opened in hard soil, resulting in incomplete pouring of pile bottom concrete, affecting the end resistance. Based on this, the present invention proposes a mud-extraction cast-in-place large-diameter pipe pile construction equipment and a construction method thereof. Summary of the Invention

[0004] In response to the above technical problems existing in the prior art, the present invention proposes a mud-extraction cast-in-place large-diameter pipe pile construction equipment and a construction method thereof, which overcomes the shortcomings of the prior art. By setting a spiral structure, and in the process of drilling, the spiral structure is in front and the inner and outer sleeves are in the back, the soil is taken in advance by the spiral, which reduces the vibration sinking resistance; by setting internal and external exciters and power heads, a dual-power structure is formed, and the sinking and pulling-out processes of the inner and outer sleeves are independent, rather than both being pulled up at the same time, which reduces the equipment load; the lower ends of the inner and outer sleeves are not provided with a valve structure, but are directly opened, which can further reduce the sinking resistance, take soil by the spiral structure, and prepare the soil into a cavity formed by mud extraction, and pour concrete in the cavity to avoid incomplete concrete pouring at the bottom of the pile.

[0005] A cast-in-situ large-diameter pipe pile construction equipment for mud extraction, characterized in that it includes a walking system, a chassis, a mast, a main winch, an auxiliary winch, an auxiliary winch, a power head, an external vibrator, an internal vibrator, a spiral structure, an outer sleeve, an inner sleeve, a deflector, a channel A, a channel B, and a channel C; the deflector is divided into a rotating part and a fixed part, the walking system is connected to the chassis, the chassis is connected to the mast, the main winch and the auxiliary winch are both connected to the chassis, the power head is connected to the main winch through a steel strand, the spiral structure is connected to the rotating part of the deflector, and the deflector rotates The A part is connected to the power head, the deflector fixing part is connected to the power head shell, the external vibrator is installed on the outside of the upper part of the outer sleeve, and is connected to the outer sleeve through a pin shaft, the internal vibrator is installed on the inner side of the upper part of the inner sleeve, and is connected to the inner sleeve through a pin shaft, the internal vibrator is connected to the auxiliary winch through a steel strand, the auxiliary winch is installed on the power head, and the outer sleeve is connected to the auxiliary winch through a steel strand; the A channel and the B channel are arranged on the spiral structure and are connected to the mud pump, the C channel is arranged on the spiral structure, and a nozzle is arranged at the intersection of the C channel and the spiral blade.

[0006] Preferably, the walking system is a crawler type or a walking type.

[0007] Preferably, the power head is a hollow structure, the deflector is a hollow structure, the deflector is a three-channel structure, and the three channels are respectively connected to channel A, channel B, and channel C, wherein channel A and channel B are gas channels and slurry channels, the gas in the gas channel flows from the deflector to the mud pump, the slurry in the slurry channel flows from the mud pump to the deflector, and channel C is a water channel, and the water in the water channel flows from the deflector to the nozzle.

[0008] Preferably, the spiral structure includes a vertical pipe and spiral blades, the spiral blades are welded to the vertical pipe, and the spiral blades are arranged at a height of 0.5-1.5m below the vertical pipe.

[0009] Preferably, the internal vibrator is connected to the auxiliary winch through a steel strand, one end of the steel strand is fixed to the auxiliary winch, passes through the hollow structure of the power head, and the other end is fixed to the internal vibrator.

[0010] Preferably, the power head is connected to the main winch through a steel wire rope, which is divided into two routes. One end of the first route is fixed at the lower part of the power head, bypasses the pulley at the lower part of the mast and is connected to the main winch. One end of the second route is fixed at the upper part of the power head, bypasses the pulley at the upper part of the mast and is connected to the main winch.

[0011] Preferably, the outer sleeve is connected to the auxiliary winch through a steel wire rope, and the routing path of the steel wire rope is: one end is fixed on the auxiliary winch, downward and around the pulley fixed on one side of the upper part of the outer sleeve, then upward around the pulley fixed on one side of the lower part of the power head, then horizontally around the pulley fixed on the other side of the lower part of the power head, then downward around the pulley fixed on the other side of the upper part of the outer sleeve, and finally upward fixed to the power head.

[0012] Preferably, the number of external vibrators and internal vibrators is 1-8, which is determined according to the magnitude of the exciting force and the space.

[0013] A construction method of a slurry extraction cast-in-place large-diameter pipe pile construction equipment, using the slurry extraction cast-in-place large-diameter pipe pile construction equipment for construction, the specific construction method is as follows: Step 1: Measure and place pile positions According to the design requirements, the center of the inner sleeve is aligned with the design point; Step 2: Drilling The spiral structure, inner sleeve, and outer sleeve are coaxially arranged. The lower parts of the inner sleeve and outer sleeve are designed to be blade-shaped. The spiral structure is located between the inner and outer sleeves, and the lower part of the spiral structure extends 5cm-30cm beyond the inner and outer sleeves. The first line of the main winch retracts the steel strand while the second line releases the steel strand. The power head drives the spiral structure to rotate and move downward. The auxiliary winch and the auxiliary winch release the steel strand. The external vibrator and the internal vibrator vibrate the outer and inner sleeves downward until they reach the designed depth. During the drilling process, water is sprayed out through the nozzle through the C channel, and the spiral blades turn up the soil to form mud. The mud is discharged from the B channel through the mud pump. The mud pump is a pneumatic pump, and the gas in the A channel is connected to the mud pump. Step 3: Lift the spiral structure The first line of the main winch releases the steel strand while the second line retracts the steel strand. The power head drives the spiral structure to rotate and move upward until the lower end of the spiral structure is higher than the upper ends of the outer casing and the inner casing. Step 4: Equipment relocation Remove the connection between the internal vibrator and the steel strand, release a sufficient length of steel strand with the auxiliary winch, and rotate or move the equipment to avoid the space above the upper end of the outer casing; Step 5: Insert the steel cage and pour concrete Use a crane to insert the steel cage between the outer casing and the inner casing, and pour concrete between the outer casing and the inner casing. Turn on the external vibrator and the internal vibrator during the concrete pouring process. Step 6: Pull out the inner sleeve The steel strand is retracted through the auxiliary winch, driving the inner casing to move upward. The auxiliary winch releases the steel strand to ensure that the outer sleeve does not move upward with the power head. At the same time, the internal vibrator is kept on until the upper end of the inner casing is flush with the upper end of the spiral structure. The auxiliary winch and the internal vibrator are stopped. Step 7: Pull out the outer sleeve Retract the steel strands through the auxiliary winch, driving the outer casing upwards while keeping the external vibrator on until the upper end of the outer casing is flush with the upper end of the inner casing, stop the auxiliary winch, and stop the external vibrator; Step 8: Backfill Concrete After the outer casing is pulled out, backfill the concrete according to the concrete liquid level to ensure that the concrete structure reaches the designed elevation and complete the construction.

[0014] The beneficial technical effects brought about by the present invention are: By setting up a spiral structure, and in the process of drilling, the spiral structure is in front and the inner and outer casings are in the back, and the soil is taken in advance by the spiral, the vibration sinking resistance is reduced; by setting up internal and external vibrators and power heads, a dual-power structure is formed, and the sinking and pulling out processes of the inner and outer casings are independent, rather than both being pulled up at the same time, which reduces the equipment load; the lower ends of the inner and outer casings are no longer provided with a valve structure, but are directly opened, which can further reduce the sinking resistance, and the soil is taken through the spiral structure, and the soil is prepared into mud for extraction to form a cavity, and concrete is poured in the cavity to avoid incomplete concrete pouring at the bottom of the pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of equipment for cast-in-place large-diameter pipe pile construction using slurry extraction and a construction method thereof according to the present invention.

[0016] Figure 2 This is a structural diagram of the deflector in the mud extraction cast-in-place large-diameter pipe pile construction equipment and construction method of the present invention.

[0017] Among them, 1-walking system, 2-chassis, 3-mast, 4-main winch, 5-auxiliary winch, 6-auxiliary winch, 7-power head, 8-external exciter, 9-internal exciter, 10-spiral structure, 11-outer casing, 12-inner casing, 13-deflector, 14-A channel, 15-B channel, 16-C channel. DETAILED DESCRIPTION Example 1:

[0018] like Figures 1 and 2As shown, a cast-in-situ large-diameter pipe pile construction equipment for mud extraction is characterized in that it includes a walking system 1, a chassis 2, a mast 3, a main winch 4, an auxiliary winch 5, an auxiliary winch 6, a power head 7, an external vibrator 8, an internal vibrator 9, a spiral structure 10, an outer sleeve 11, an inner sleeve 12, a deflector 13, a channel A 14, a channel B 15, and a channel C 16; the deflector 13 is divided into a rotating part and a fixed part, the walking system 1 is connected to the chassis 2, the chassis 2 is connected to the mast 3, the main winch 4 and the auxiliary winch 5 are both connected to the chassis 2, the power head 7 is connected to the main winch 4 through a steel strand, the spiral structure 10 is connected to the rotating part of the deflector 13, and the deflector The rotating part of the device 13 is connected to the power head 7, the fixed part of the deflector 13 is connected to the outer shell of the power head 7, the external vibrator 8 is installed on the outside of the upper part of the outer sleeve 11, and is connected to the outer sleeve 11 through a pin shaft, the internal vibrator 9 is installed on the inner side of the upper part of the inner sleeve 12, and is connected to the inner sleeve 12 through a pin shaft, the internal vibrator 9 is connected to the auxiliary winch 5 through a steel strand, the auxiliary winch 6 is installed on the power head 7, and the outer sleeve 11 is connected to the auxiliary winch 6 through a steel strand; the A channel 14 and the B channel 15 are arranged on the spiral structure 10 and are connected to the mud pump, the C channel 16 is arranged on the spiral structure 10, and a nozzle is arranged at the intersection of the C channel 16 and the spiral blade.

[0019] Preferably, the walking system 1 is a crawler type or a walking type.

[0020] Preferably, the power head 7 is a hollow structure, the deflector 13 is a hollow structure, the deflector 13 is a three-channel structure, and the three channels are respectively connected to channel A 14, channel B 15, and channel C 16, wherein channel A 14 and channel B 15 are gas channels and slurry channels, the gas in the gas channel flows from the deflector 13 to the mud pump, the slurry in the slurry channel flows from the mud pump to the deflector 13, and channel C 16 is a water channel, and the water in the water channel flows from the deflector 13 to the nozzle.

[0021] Preferably, the spiral structure 10 includes a vertical pipe and spiral blades, the spiral blades are welded to the vertical pipe, and the spiral blades are arranged at a height of 0.5-1.5 m below the vertical pipe.

[0022] Preferably, the internal vibrator 9 is connected to the auxiliary winch 5 through a steel strand, one end of the steel strand is fixed to the auxiliary winch 5 , passes through the hollow structure of the power head 7 , and the other end is fixed to the internal vibrator 9 .

[0023] Preferably, the power head 7 is connected to the main winch 4 through a steel wire rope, and the steel wire rope is divided into two routes. One end of the first route is fixed at the lower part of the power head 7, bypasses the pulley at the lower part of the mast 3 and is connected to the main winch 4. One end of the second route is fixed at the upper part of the power head 7, bypasses the pulley at the upper part of the mast 3 and is connected to the main winch 4.

[0024] Preferably, the outer sleeve 11 is connected to the auxiliary winch 6 through a steel wire rope, and the routing path of the steel wire rope is: one end is fixed on the auxiliary winch 6, downward and around the pulley fixed on one side of the upper part of the outer sleeve 11, then upward around the pulley fixed on one side of the lower part of the power head 7, then horizontally around the pulley fixed on the other side of the lower part of the power head 7, then downward around the pulley fixed on the other side of the upper part of the outer sleeve 11, and finally fixed upward on the power head 7.

[0025] Preferably, the number of external exciters 8 and internal exciters 9 is 1-8, which is determined according to the magnitude of the exciting force and the space.

[0026] A construction method of a slurry extraction cast-in-place large-diameter pipe pile construction equipment, using the slurry extraction cast-in-place large-diameter pipe pile construction equipment for construction, the specific construction method is as follows: Step 1: Measure and place pile positions According to the design requirements, the center of the inner sleeve is aligned with the design point; Step 2: Drilling The spiral structure 10, the inner sleeve and the outer sleeve are coaxially arranged. The lower parts of the inner sleeve and the outer sleeve are designed to be blade-shaped. The spiral structure 10 is between the inner sleeve 12 and the outer sleeve 11. The lower part of the spiral structure 10 exceeds the inner sleeve and the outer sleeve by 5cm-30cm. The first line of the main winch 4 retracts the steel strand while the second line releases the steel strand. The power head 7 drives the spiral structure 10 to rotate and move downward. The auxiliary winch 5 and the auxiliary winch 6 release the steel strand. The external vibrator 8 and the internal vibrator 9 vibrate the outer sleeve 11 and the inner sleeve 12 downward until the designed depth is reached. During the drilling process, water is sprayed out through the nozzle through the C channel 16, and the spiral blades turn over the soil to form mud. The mud is discharged from the B channel 15 through the mud pump. The mud pump is a pneumatic pump, and the gas in the A channel 14 is connected to the mud pump. Step 3: Lift the spiral structure 10 The first line of the main winch 4 releases the steel strand while the second line retracts the steel strand. The power head 7 drives the spiral structure 10 to rotate and move upward until the lower end of the spiral structure 10 is higher than the upper ends of the outer sleeve 11 and the inner sleeve 12; Step 4: Equipment relocation Remove the connection between the internal exciter 9 and the steel strand, release the steel strand of sufficient length from the auxiliary winch 6, and rotate or move the equipment to avoid the space above the upper end of the outer sleeve 11; Step 5: Insert the steel cage and pour concrete A crane is used to insert the steel cage between the outer casing 11 and the inner casing 12, and concrete is poured between the outer casing 11 and the inner casing 12. During the concrete pouring process, the external vibrator 8 and the internal vibrator 9 are turned on; Step 6: Pull out the inner sleeve 12 The steel strand is retracted by the auxiliary winch 5, driving the inner sleeve 12 to move upward, and the auxiliary winch 6 releases the steel strand to ensure that the outer sleeve does not move upward with the power head 7. At the same time, the internal vibrator 9 is kept open until the upper end of the inner sleeve 12 is flush with the upper end of the spiral structure 10, and the auxiliary winch 5 is stopped, and the internal vibrator 9 is stopped; Step 7: Pull out the outer sleeve 11 The steel strand is retracted by the auxiliary winch 6, driving the outer sleeve 11 upward, while keeping the external vibrator 8 turned on, until the upper end of the outer sleeve 11 is flush with the upper end of the inner sleeve 12, then the auxiliary winch 5 is stopped, and the external vibrator 8 is stopped; Step 8: Backfill Concrete After the outer sleeve 11 is pulled out, backfill the concrete according to the concrete liquid level to ensure that the concrete structure reaches the designed elevation and the construction is completed. Example 2:

[0027] like Figures 1 and 2 As shown, compared with construction in soft soil areas, construction in hard soil areas requires much more equipment and has a more complex construction process. Taking the geological conditions of interbedded clay and sand in the north as an example, the construction process of a project with a construction depth of 20m is as follows: A cast-in-situ large-diameter pipe pile construction equipment for mud extraction is characterized in that it includes a walking system 1, a chassis 2, a mast 3, a main winch 4, an auxiliary winch 5, an auxiliary winch 6, a power head 7, an external vibrator 8, an internal vibrator 9, a spiral structure 10, an outer sleeve 11, an inner sleeve 12, a deflector 13, an A channel 14, a B channel 15, and a C channel 16; the deflector 13 is divided into a rotating part and a fixed part, the walking system 1 is connected to the chassis 2, the chassis 2 is connected to the mast 3, the main winch 4 and the auxiliary winch 5 are both connected to the chassis 2, the power head 7 is connected to the main winch 4 through a steel strand, the spiral structure 10 is connected to the rotating part of the deflector 13, and the deflector The rotating portion 13 is connected to the power head 7, and the fixed portion of the deflector 13 is connected to the power head 7 housing. The external vibrator 8 is mounted on the outer side of the upper portion of the outer sleeve 11 and is connected to the outer sleeve 11 via a pin. The internal vibrator 9 is mounted on the inner side of the upper portion of the inner sleeve 12 and is connected to the inner sleeve 12 via a pin. The internal vibrator 9 is connected to the auxiliary winch 5 via a steel strand. The auxiliary winch 6 is mounted on the power head 7, and the outer sleeve 11 is connected to the auxiliary winch 6 via a steel strand. The internal and external vibrators 8 and the power head 7 form a dual-power structure. In addition, the sinking and extraction processes of the inner and outer sleeves 11 are independent, rather than both being pulled up simultaneously, reducing equipment load. The A channel 14 and B channel 15 are mounted on the spiral structure 10 and connected to the mud pump. The C channel 16 is mounted on the spiral structure 10, and a nozzle is located at the intersection of the C channel 16 and the spiral blades. The nozzle breaks up the soil turned up by the spiral blades and mixes it into mud, which is then extracted by the mud pump.

[0028] Preferably, the walking system 1 is a crawler type or a walking type.

[0029] Preferably, the power head 7 is a hollow structure, the deflector 13 is a hollow structure, the deflector 13 is a three-channel structure, and the three channels are respectively connected to channel A 14, channel B 15, and channel C 16, wherein channel A 14 and channel B 15 are gas channels and slurry channels, the gas in the gas channel flows from the deflector 13 to the mud pump, the slurry in the slurry channel flows from the mud pump to the deflector 13, and channel C 16 is a water channel, and the water in the water channel flows from the deflector 13 to the nozzle.

[0030] Preferably, the spiral structure 10 includes a vertical tube and spiral blades, which are welded to the vertical tube and are provided at a height of 0.5-1.5 m below the vertical tube. By providing the spiral structure 10, with the spiral structure 10 leading the way and the inner and outer casings 11 trailing during the drilling process, the spiral structure 10 allows for early soil removal, reducing vibration sinking resistance. The lower spiral blades are provided to facilitate advance drilling and to facilitate the smooth pouring of soil from the drilling process between the inner and outer casings 12, 11, through a section of the spiral blades. The core process remains dry drilling.

[0031] Preferably, the outer sleeve 11 is connected to the auxiliary winch 6 through a steel wire rope, and the routing path of the steel wire rope is: one end is fixed on the auxiliary winch 6, downward and around the pulley fixed on one side of the upper part of the outer sleeve 11, then upward around the pulley fixed on one side of the lower part of the power head 7, then horizontally around the pulley fixed on the other side of the lower part of the power head 7, then downward around the pulley fixed on the other side of the upper part of the outer sleeve 11, and finally fixed upward on the power head 7.

[0032] Preferably, the number of external exciters 8 and internal exciters 9 is 1-8, which is determined according to the magnitude of the exciting force and the space.

[0033] A construction method of a slurry extraction cast-in-place large-diameter pipe pile construction equipment, using the slurry extraction cast-in-place large-diameter pipe pile construction equipment for construction, the specific construction method is as follows: Step 1: Measure and place pile positions According to the design requirements, the center of the inner sleeve is aligned with the design point; Step 2: Drilling The spiral structure 10, the inner sleeve and the outer sleeve are coaxially arranged. The lower parts of the inner sleeve and the outer sleeve are designed to be blade-shaped. The spiral structure 10 is between the inner sleeve 12 and the outer sleeve 11. The lower part of the spiral structure 10 exceeds the inner sleeve and the outer sleeve by 5cm-30cm. The first line of the main winch 4 retracts the steel strand while the second line releases the steel strand. The power head 7 drives the spiral structure 10 to rotate and move downward. The auxiliary winch 5 and the auxiliary winch 6 release the steel strand. The external vibrator 8 and the internal vibrator 9 vibrate the outer sleeve 11 and the inner sleeve 12 downward. Move until it reaches the designed depth; during the drilling process, water is sprayed out through the nozzle through the C channel 16, and the spiral blades turn over the soil to form mud, and the mud is discharged from the B channel 15 through the mud pump. The mud pump is a pneumatic pump, and the gas of the A channel 14 is connected to the mud pump; the lower end of the inner and outer sleeves 11 is no longer provided with a valve structure, but is directly opened, which can further reduce the sinking resistance, and the soil is taken through the spiral structure 10, and the soil is prepared into mud for extraction to form a cavity, and concrete is poured in the cavity to avoid incomplete concrete pouring at the bottom of the pile.

[0034] Step 3: Lift the spiral structure 10 The first line of the main winch 4 releases the steel strand while the second line retracts the steel strand. The power head 7 drives the spiral structure 10 to rotate and move upward until the lower end of the spiral structure 10 is higher than the upper ends of the outer sleeve 11 and the inner sleeve 12; Step 4: Equipment relocation Remove the connection between the internal exciter 9 and the steel strand, release the steel strand of sufficient length from the auxiliary winch 6, and rotate or move the equipment to avoid the space above the upper end of the outer sleeve 11; Step 5: Insert the steel cage and pour concrete A crane is used to insert the steel cage between the outer casing 11 and the inner casing 12, and concrete is poured between the outer casing 11 and the inner casing 12. During the concrete pouring process, the external vibrator 8 and the internal vibrator 9 are turned on; Step 6: Pull out the inner sleeve 12 The steel strand is retracted by the auxiliary winch 5, driving the inner sleeve 12 to move upward, and the auxiliary winch 6 releases the steel strand to ensure that the outer sleeve does not move upward with the power head 7. At the same time, the internal vibrator 9 is kept open until the upper end of the inner sleeve 12 is flush with the upper end of the spiral structure 10, and the auxiliary winch 5 is stopped, and the internal vibrator 9 is stopped; Step 7: Pull out the outer sleeve 11 The steel strand is retracted by the auxiliary winch 6, driving the outer sleeve 11 upward, while keeping the external vibrator 8 turned on, until the upper end of the outer sleeve 11 is flush with the upper end of the inner sleeve 12, then the auxiliary winch 5 is stopped, and the external vibrator 8 is stopped; Step 8: Backfill Concrete After the outer sleeve 11 is pulled out, backfill the concrete according to the concrete liquid level to ensure that the concrete structure reaches the designed elevation and the construction is completed.

[0035] In the description of the embodiments of the present invention, it should be understood that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood based on specific circumstances.

[0036] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention also fall within the scope of protection of the present invention.

Claims

1. A slurry extraction cast-in-place large-diameter pipe pile construction equipment, characterized in that: It includes a walking system, a chassis, a mast, a main winch, an auxiliary winch, an auxiliary winch, a power head, an external vibrator, an internal vibrator, a spiral structure, an outer sleeve, an inner sleeve, a deflector, a channel A, a channel B, and a channel C; the deflector is divided into a rotating part and a fixed part, the walking system is connected to the chassis, the chassis is connected to the mast, the main winch and the auxiliary winch are connected to the chassis, the power head is connected to the main winch through a steel strand, the spiral structure is connected to the rotating part of the deflector, the rotating part of the deflector is connected to the power head, the deflector The fixed part is connected to the power head casing, the external vibrator is installed on the outside of the upper part of the outer sleeve and is connected to the outer sleeve through a pin shaft, the internal vibrator is installed on the inside of the upper part of the inner sleeve and is connected to the inner sleeve through a pin shaft, the internal vibrator is connected to the auxiliary winch through a steel strand, the auxiliary winch is installed on the power head, and the outer sleeve is connected to the auxiliary winch through a steel strand; the A channel and the B channel are arranged on the spiral structure and are connected to the mud pump, the C channel is arranged on the spiral structure, and a nozzle is arranged at the intersection of the C channel and the spiral blade.

2. The slurry extraction cast-in-place large-diameter pipe pile construction equipment according to claim 1, characterized in that: The walking system is a crawler type or a walking type.

3. The slurry extraction cast-in-place large-diameter pipe pile construction equipment according to claim 1, characterized in that: The power head is a hollow structure, the deflector is a hollow structure, and the deflector is a three-channel structure. The three channels are connected to channel A, channel B, and channel C respectively, among which channel A and channel B are gas channels and slurry channels. The gas in the gas channel flows from the deflector to the mud pump, and the slurry in the slurry channel flows from the mud pump to the deflector. Channel C is a water channel, and the water in the water channel flows from the deflector to the nozzle.

4. The cast-in-place large-diameter pipe pile construction equipment for slurry extraction according to claim 1, characterized in that: The spiral structure includes a vertical pipe and spiral blades. The spiral blades are welded to the vertical pipe. The spiral blades are arranged at a height of 0.5-1.5m below the vertical pipe.

5. The slurry extraction cast-in-place large-diameter pipe pile construction equipment according to claim 1, characterized in that: The internal vibrator is connected to the auxiliary winch through a steel strand, one end of the steel strand is fixed to the auxiliary winch, passes through the hollow structure of the power head, and the other end is fixed to the internal vibrator.

6. The slurry extraction cast-in-place large-diameter pipe pile construction equipment according to claim 1, characterized in that: The power head is connected to the main winch through a steel wire rope. The steel wire rope is divided into two routes. One end of the first route is fixed at the lower part of the power head, bypasses the pulley at the lower part of the mast and connects to the main winch. One end of the second route is fixed at the upper part of the power head, bypasses the pulley at the upper part of the mast and connects to the main winch.

7. The slurry extraction cast-in-place large-diameter pipe pile construction equipment according to claim 1, characterized in that: The outer casing is connected to the auxiliary winch through a steel wire rope. The routing path of the steel wire rope is: one end is fixed on the auxiliary winch, downward and around the pulley fixed on one side of the upper part of the outer casing, then upward around the pulley fixed on one side of the lower part of the power head, then horizontally around the pulley fixed on the other side of the lower part of the power head, then downward around the pulley fixed on the other side of the upper part of the outer casing, and finally upward fixed to the power head.

8. The slurry extraction cast-in-place large-diameter pipe pile construction equipment according to claim 1, characterized in that: The number of external exciters and internal exciters is 1-8, which is determined according to the magnitude of the exciting force and the space.

9. A construction method for cast-in-situ large-diameter pipe pile construction equipment using slurry extraction, characterized in that: The construction is carried out using cast-in-place large-diameter pipe pile construction equipment with mud extraction. The specific construction method is as follows: Step 1: Measure and place pile positions According to the design requirements, the center of the inner sleeve is aligned with the design point; Step 2: Drilling The spiral structure, inner sleeve, and outer sleeve are coaxially arranged. The lower parts of the inner sleeve and outer sleeve are designed to be blade-shaped. The spiral structure is located between the inner and outer sleeves, and the lower part of the spiral structure extends 5cm-30cm beyond the inner and outer sleeves. The first line of the main winch retracts the steel strand while the second line releases the steel strand. The power head drives the spiral structure to rotate and move downward. The auxiliary winch and the auxiliary winch release the steel strand. The external vibrator and the internal vibrator vibrate the outer and inner sleeves downward until they reach the designed depth. During the drilling process, water is sprayed out through the nozzle through the C channel, and the spiral blades turn up the soil to form mud. The mud is discharged from the B channel through the mud pump. The mud pump is a pneumatic pump, and the gas in the A channel is connected to the mud pump. Step 3: Lift the spiral structure The first line of the main winch releases the steel strand while the second line retracts the steel strand. The power head drives the spiral structure to rotate and move upward until the lower end of the spiral structure is higher than the upper ends of the outer casing and the inner casing. Step 4: Equipment relocation Remove the connection between the internal vibrator and the steel strand, release a sufficient length of steel strand with the auxiliary winch, and rotate or move the equipment to avoid the space above the upper end of the outer casing; Step 5: Insert the steel cage and pour concrete Use a crane to insert the steel cage between the outer casing and the inner casing, and pour concrete between the outer casing and the inner casing. Turn on the external vibrator and the internal vibrator during the concrete pouring process. Step 6: Pull out the inner sleeve The steel strand is retracted through the auxiliary winch, driving the inner casing to move upward. The auxiliary winch releases the steel strand to ensure that the outer sleeve does not move upward with the power head. At the same time, the internal vibrator is kept on until the upper end of the inner casing is flush with the upper end of the spiral structure. The auxiliary winch and the internal vibrator are stopped. Step 7: Pull out the outer sleeve Retract the steel strands through the auxiliary winch, driving the outer casing upwards while keeping the external vibrator on until the upper end of the outer casing is flush with the upper end of the inner casing, stop the auxiliary winch, and stop the external vibrator; Step 8: Backfill Concrete After the outer casing is pulled out, backfill the concrete according to the concrete liquid level to ensure that the concrete structure reaches the designed elevation and complete the construction.

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