CN113153191A - Long spiral drilling machine and construction method of air-entrapping CFG pile - Google Patents
Long spiral drilling machine and construction method of air-entrapping CFG pile Download PDFInfo
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- CN113153191A CN113153191A CN202110205543.7A CN202110205543A CN113153191A CN 113153191 A CN113153191 A CN 113153191A CN 202110205543 A CN202110205543 A CN 202110205543A CN 113153191 A CN113153191 A CN 113153191A
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- pressure
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- hollow shaft
- air
- drill rod
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/16—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using gaseous fluids
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/22—Rods or pipes with helical structure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterized by means for land transport with their own drive, e.g. skid mounting or wheel mounting
Abstract
The application relates to the field of drilling machine equipment, in particular to a long spiral drilling machine and a construction method of an air-entrapping CFG pile. A long spiral drilling machine comprises a drill rod, wherein the drill rod comprises a hollow shaft and spiral blades, the spiral blades are arranged on the circumferential surface of the hollow shaft and comprise high-pressure vent pipes vertically arranged on the hollow shaft and high-pressure air-making devices capable of conveying high-pressure air to the interior of the high-pressure vent pipes, the high-pressure air-making devices are communicated with the upper ends of the high-pressure vent pipes, and the bottom ends of the high-pressure vent pipes are arranged at positions close to the bottom end of the hollow shaft; the construction method of the air-entrapping CFG pile comprises the following steps: s1, processing the ground to be flat; s2, moving the long spiral drilling machine to a lofting area, and opening a valve of an air outlet of the high-pressure air storage tank when the drill rod is screwed into the underground hard stratum until the drill rod reaches a certain depth; s3, pumping the concrete into the hole through the drill rod, and pulling out the drill rod at a constant speed; the aim of reducing the possibility of locking the drill rod in the running process is fulfilled.
Description
Technical Field
The application relates to the field of CFG pile construction, in particular to a long spiral drilling machine and a construction method of an aerated CFG pile.
Background
The long spiral drilling machine is special drilling equipment mainly used for underground drilling of coal mines, drilling of hydroelectric engineering, grouting and drilling of dams, bridges and tunnel foundations and the like.
The long and medium spiral drilling machine in the related art comprises a drilling machine frame, a slide way and a driving head capable of sliding up and down along the slide way are arranged on the drilling machine frame, and an output shaft of the driving head is connected with a hollow drilling rod. The driving head drives the drill rod to rotate and move downwards along the slide way, so that the drill rod is screwed into the ground, and then the drill rod is taken out from the ground upwards, and meanwhile, the concrete is poured into the hole in the ground through the center of the drill rod.
In view of the above-mentioned related art solutions, the inventors found that: when a drill rod of a long spiral drilling machine drills holes in hard formations such as argillaceous sandstone and the like, the drill rod can break the argillaceous sandstone and then is screwed into the ground, when the drill rod deviates in the hole, the edge of the drill rod is rubbed with the side wall of the hole, and the argillaceous sandstone on the side wall of the hole locks the drill rod to influence the normal operation of drilling operation.
Disclosure of Invention
In order to reduce the possibility of the drill rod being locked during operation, the application provides a long auger drilling machine.
The long spiral drilling machine provided by the application adopts the following technical scheme:
the utility model provides a long auger drilling machine, includes the drilling rod, and the drilling rod includes hollow shaft and helical blade, and helical blade sets up on the global of hollow shaft, including vertical setting on the hollow shaft high-pressure vent pipe and can be to the inside high-pressure system gas device who carries high-pressure air of high-pressure vent pipe, high-pressure system gas device is linked together with high-pressure vent pipe's upper end, and high-pressure vent pipe's bottom setting is in the position that is close to the hollow shaft bottom.
By adopting the technical scheme, when the drill rod drills in hard formations such as argillaceous sandstone and the like, the high-pressure gas making device is used for making high-pressure gas, the high-pressure vent pipe is used for introducing the made high-pressure gas to the bottom of the drill rod, and then the high-pressure gas can be diffused underground; as the drill rod is screwed into the ground from the ground surface, high-pressure gas can be diffused along the drill rod, an annular airflow protection layer is formed on the circumferential direction of the drill rod, and the argillaceous sandstone which locks the hollow shaft and the helical blade is impacted and loosened, so that the possibility that the drill rod is locked by an underground structure in the drilling operation process is reduced.
Preferably, the high-pressure vent pipe penetrates through the helical blade, the peripheral surface of the high-pressure vent pipe is abutted to the peripheral surface of the hollow shaft, and the high-pressure vent pipe is fixedly connected with the helical blade and the hollow shaft respectively.
Through adopting above-mentioned technical scheme, the global of high-pressure vent pipe is laminated with the global of hollow shaft mutually, consequently when hollow shaft and helical blade are in the screw in underground, the resistance that high-pressure vent pipe received will be offset partly by the hollow shaft, and then reduce the wearing and tearing of underground structure to high-pressure vent pipe, increase high-pressure vent pipe's life, compare in placing high-pressure vent pipe inside the hollow shaft, install high-pressure vent pipe in the hollow shaft outside and not only made things convenient for high-pressure vent pipe's installation and maintenance, the impact wear of concrete to high-pressure vent pipe when pouring concrete has been reduced simultaneously, high-pressure vent pipe's life has been increased.
Preferably, the high-pressure gas making device comprises an air compressor and a high-pressure gas storage tank with a valve, the air compressor is communicated with one end of the high-pressure gas storage tank, and a gas outlet with the valve of the high-pressure gas storage tank is communicated with the high-pressure vent pipe.
Through adopting above-mentioned technical scheme, air compressor is linked together with high-pressure gas holder, air compressor can continuously carry out the pump gas to high-pressure gas holder inside, make high-pressure gas holder inside deposit high-pressure gas, the end of giving vent to anger of high-pressure gas holder is linked together with high-pressure breather pipe, consequently when needs let in high-pressure gas to high-pressure breather pipe inside, only need with high-pressure gas holder inside gaseous carry to high-pressure breather pipe can, make directly make high-pressure gas and take high-pressure gas separately, the work efficiency is improved, and also can reduce the possibility that can't carry high-pressure gas to high-pressure breather pipe because of air compressor trouble.
Preferably, be provided with connecting device between high-pressure system gas device and high-pressure vent pipe, connecting device is including following high-pressure vent pipe pivoted pipeline of giving vent to anger, the admission line that is connected with high-pressure system gas device and being used for connecting the gas delivery subassembly of pipeline of giving vent to anger and admission line.
Through adopting above-mentioned technical scheme, be connected high-pressure system gas device and high-pressure vent pipe through connecting device, the pipeline of giving vent to anger is connected with high-pressure vent pipe, and the pipeline of giving vent to anger can follow high-pressure vent pipe and rotate, and admission line and high-pressure system gas device are linked together, and through the gas delivery subassembly between admission line and the pipeline of giving vent to anger, the pipeline of giving vent to anger is when carrying out the pivoted, and high-pressure gas also can enter into the pipeline of giving vent to anger from the admission line.
Preferably, the gas conveying assembly comprises a rotating shell and a fixed shell, the rotating shell is connected with the hollow shaft, vent grooves are formed in the circumferential surface of the rotating shell and communicated with the gas outlet pipeline, the fixed shell is sleeved outside the rotating shell, the outer wall of the rotating shell is abutted to the inner wall of the fixed shell, the rotating shell can rotate inside the fixed shell, and the gas inlet pipeline is arranged on the fixed shell and communicated with the vent grooves.
Through adopting above-mentioned technical scheme, the outer wall of rotation shell and the mutual butt of inner wall of set casing have seted up the air channel on rotating the global of shell, and the admission line all communicates inside the air channel with the pipeline of giving vent to anger, consequently when rotating shell and set casing support and rotate, inside high-pressure gas of admission line still can enter into the pipeline of giving vent to anger through the air channel.
Preferably, a fixing flange is provided on the upper end surface of the fixing housing.
Through adopting above-mentioned technical scheme, be provided with mounting flange on the set casing, make through mounting flange and can be connected between the organism of set casing and long auger drilling machine, long auger drilling machine can drive and rotate the shell and rotate, makes the admission line who is connected with high-pressure gas making device can carry out conveying gas at fixed position.
Preferably, a sealing ring is disposed between the rotating case and the stationary case, and the sealing ring is provided with two sides respectively located at the vent grooves.
Through adopting above-mentioned technical scheme, be provided with the sealing ring on the both sides position of air channel, the sealing ring can increase the leakproofness between rotation shell and the set casing, and then reduces the possibility that high-pressure gas takes place to leak gas when air channel is inside to pass through.
Preferably, two ends of the two sealing rings, which are far away from each other, are respectively provided with a limiting ring.
Through adopting above-mentioned technical scheme, two spacing ring settings can increase the leakproofness between rotation shell and the set casing on the one hand at the both ends that two sealing rings kept away from each other, and on the other hand can restrict the sealing ring, reduces the sealing ring and rotates the shell and rotate the time-out when the shell rotates with the set casing, and the sealing ring drops mutually with the rotation shell possibility.
Preferably, a protective rib is arranged on the edge of the helical blade remote from the hollow shaft.
Through adopting above-mentioned technical scheme, the protection muscle can increase helical blade intensity when the screw in is underground, reduces the possibility of helical blade damage, increases helical blade's life.
The second invention of the application aims to provide a method for constructing an air-entrapping CFG pile, which adopts the following technical scheme:
a construction method of an aerated CFG pile utilizes the long auger drilling machine to carry out drilling construction, and comprises the following steps:
s1, processing the ground to be flat so as to facilitate the construction of the long auger drilling machine and carry out measurement lofting;
s2, moving the long spiral drilling machine to a lofting area, starting the long spiral drilling machine and drilling underground, and opening a valve at an air outlet of a high-pressure air storage tank when a drill rod is screwed into an underground hard stratum to enable high-pressure air to flow to a high-pressure vent pipe until the drill rod reaches a certain depth;
and S3, pumping the concrete into the hole through the hollow shaft of the drill rod, and simultaneously pulling out the drill rod at a constant speed.
In summary, the present application has the following technical effects:
1. by arranging the high-pressure vent pipe, the high-pressure vent pipe leads the manufactured high-pressure gas to the bottom of the drill rod, then the high-pressure gas can diffuse from the ground, the high-pressure gas can diffuse along the drill rod, and the argillaceous sandstone which locks the hollow shaft and the helical blade is impacted and loosened, so that the drill rod can continue to operate;
2. through having set up rotation shell and set casing, the air channel has been seted up on rotation shell global, and the admission line all communicates inside the air channel with the pipeline of giving vent to anger, consequently when rotation shell and set casing support rotate, inside high-pressure gas of admission line still can enter into the pipeline of giving vent to anger through the air channel inside.
Drawings
FIG. 1 is an overall block diagram of a drilling machine in an embodiment of the present application;
FIG. 2 is an exploded view of a connection structure in an embodiment of the present application;
fig. 3 is a partially enlarged view of a portion a in fig. 2.
In the figure, 1, a drill rod; 11. a hollow shaft; 12. a helical blade; 13. protecting the ribs; 2. a high pressure vent pipe; 21. a connecting flange; 3. a high pressure gas generating device; 31. an air compressor; 32. a high pressure gas storage tank; 4. a connecting device; 41. an air outlet pipe; 42. an air intake duct; 43. a gas delivery assembly; 44. rotating the shell; 45. a stationary case; 451. a vent channel; 452. a sealing groove; 453. a seal ring; 454. a limiting groove; 455. a limiting ring; 456. and (5) fixing the flange.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
Referring to fig. 1 and 2, the application provides a long auger drilling machine, which comprises a drilling machine body, a driving head and a drill rod 1, wherein the driving head is arranged on the drilling machine body, the drill rod 1 is arranged on the driving head, and the driving head can drive the drill rod 1 to rotate and drill holes on the ground.
Referring to fig. 2 and 3, the drill rod 1 comprises a hollow shaft 11 and helical blades 12, the hollow shaft 11 is vertically arranged, a driving head can drive the hollow shaft 11 to rotate, the helical blades 12 are sleeved at the position, close to the bottom end, of the hollow shaft 11 and fixedly connected with the hollow shaft 11, and the helical blades 12 are provided with protection ribs 13 on the edge, far away from the hollow shaft 11, of the helical blades 12, so that when the helical blades 12 rotate underground and drill holes, abrasion and damage of an underground structure to the helical blades 12 can be reduced, and the service life of the helical blades 12 is prolonged. The high-pressure vent pipe 2 is arranged on the circumferential surface of the hollow shaft 11, the high-pressure vent pipe 2 is arranged in parallel with the hollow shaft 11, the helical blade 12 is provided with a mounting hole, the high-pressure vent pipe 2 penetrates through the helical blade 12 from the inside of the mounting hole, and the circumferential surface of the high-pressure vent pipe 2 is abutted to the circumferential surface of the hollow shaft 11. The drilling machine body is provided with a high-pressure gas making device 3, and the high-pressure gas making device 3 is connected with the high-pressure vent pipe 2.
Referring to fig. 2 and 3, when the hollow shaft 11 and the helical blade 12 are drilled in a hard formation such as a muddy sandstone, the high-pressure gas can be produced by the high-pressure gas producing device 3, then the high-pressure gas is introduced into the bottom end of the hollow shaft 11 through the high-pressure vent pipe 2, the high-pressure gas is diffused upwards and outwards after entering the bottom end of the hollow shaft 11, the hollow shaft 11 and the helical blade 12 are located underground, the periphery of the hollow shaft 11 is solid, the gas is difficult to diffuse, and the hollow shaft 11 and the helical blade 12 enter the underground from the ground surface, so that the helical blade 12 weakens the underground structure, the high-pressure gas enters the hollow shaft 11 and the helical blade 12 and diffuses towards the ground along the hollow shaft 11 and the helical blade 12, and the high-pressure gas forms an annular air flow at the edge position of the helical blade 12 far away from the hollow shaft 11, and then the argillaceous sandstone at the periphery of the hollow shaft 11 and the helical blades 12 is loosened, the helical blades 12 are isolated from the side wall of the hole, the acting force of the argillaceous sandstone on the hollow shaft 11 and the helical blades 12 is reduced, and the possibility that the argillaceous sandstone locks the hollow shaft 11 and the helical blades is further reduced.
Referring to fig. 2 and 3, the high pressure gas generating device 3 includes an air compressor 31 and a high pressure gas tank 32, an air outlet end of the air compressor 31 is connected to an air inlet end of the high pressure gas tank 32, a connection device 4 is disposed on the air outlet end of the high pressure gas tank 32, and the connection device 4 is connected to the high pressure vent pipe 2. The air compressor 31 compresses air and then pumps the compressed air into the high-pressure air storage tank 32, and the high-pressure air storage tank 32 stores high-pressure air, so that when the air compressor 31 fails, the high-pressure air storage tank 32 can still introduce the high-pressure air into the high-pressure vent pipe 2. The valve is arranged at the air outlet end of the high-pressure air storage tank 32, and when the air needs to be ventilated inside the high-pressure vent pipe 2, the valve can be opened to release the high-pressure air inside the high-pressure air storage tank 32 into the high-pressure vent pipe 2 through the connecting device 4.
Referring to fig. 2 and 3, the connection device 4 includes an air outlet pipe 41, an air inlet pipe 42 and a gas delivery assembly 43, the air inlet pipe 42 is connected to an air outlet end of the high-pressure gas pressure tank, the air outlet pipe 41 is communicated with the high-pressure vent pipe 2, a pair of connection flanges 21 are arranged between the high-pressure vent pipe 2 and the air outlet pipe 41, and the two connection flanges 21 are respectively fixedly connected to the high-pressure vent pipe 2 and the air outlet pipe 41; the high-pressure vent pipe 2 and the air outlet pipe 41 pass through the connecting flange 21, so that the sealing performance between the high-pressure vent pipe 2 and the air outlet pipe 41 is better, and the high-pressure vent pipe 2 and the air outlet pipe 41 can be detached. Gas delivery assembly 43 is disposed between inlet conduit 42 and outlet conduit 41 and is capable of delivering high pressure gas within inlet conduit 42 and outlet conduit 41.
Referring to fig. 2 and 3, when ventilation needs to be performed to the inside of the high-pressure vent pipe 2, a valve at the upper gas outlet end of the high-pressure gas storage tank 32 is opened, then high-pressure gas inside the high-pressure gas storage tank 32 enters the gas inlet pipeline 42, then the high-pressure gas is conveyed to the gas outlet pipeline 41 through the gas conveying assembly 43, and then the high-pressure gas enters the inside of the high-pressure vent pipe 2 from the gas outlet pipeline 41, so that the high-pressure gas can push the argillaceous sandstone around the drill rod 1, and the possibility that the hollow shaft 11 and the helical blade 12 are locked by the argillaceous sandstone is reduced.
Referring to fig. 2 and 3, the gas delivery assembly 43 includes a rotating housing 44 and a fixed housing 45, the rotating housing 44 is a hollow sleeve structure, the rotating housing 44 is fixedly connected with the hollow shaft 11, a vent groove 451 is circumferentially formed on the rotating housing 44 near the middle, and the gas outlet pipe 41 is disposed on the rotating housing 44 and is communicated with the vent groove 451. The fixed shell 45 is of a sleeve structure, the fixed shell 45 is sleeved on the outer side of the rotating shell 44, the upper end of the rotating shell 44 is connected with the machine body of the driving head, and the inner wall of the fixed shell 45 is abutted with the outer wall of the rotating shell 44, so that the rotating shell 44 and the fixed shell 45 are kept sealed; the rotating shell 44 can rotate inside the fixed shell 45, the air inlet pipeline 42 is arranged on the fixed shell 45, the air inlet pipeline 42 is located on the outer side of the hollow shaft 11, abrasion of concrete to the air outlet pipeline 42 is reduced when the hollow shaft 11 is poured with concrete, and the air inlet pipeline 42 penetrates through the fixed shell 45 and is communicated with the vent groove 451.
Referring to fig. 2 and 3, high-pressure gas can enter the inside of the vent groove 451 between the rotating case 44 and the stationary case 45 from the inlet duct 42, and the high-pressure gas is transported from the vent groove 451 to the inside of the outlet duct 41; the fixed shell 45 is fixed with the body of the driving head, when the driving head drives the rotating shell 44 to rotate, the rotating shell 44 can drive the hollow shaft 11 to rotate, and meanwhile, the inner wall of the fixed shell 45 is abutted to the outer wall of the rotating shell 44, so that the vent groove 451 between the rotating shell 44 and the fixed shell 45 is still in a sealing state, and therefore high-pressure gas can still enter the gas outlet pipeline 41 from the gas inlet pipeline 42 through the vent groove 451, and further the high-pressure gas is conveyed to the inside of the high-pressure vent pipe 2.
Referring to fig. 2 and 3, a sealing groove 452 and a limiting groove 454 are formed in the rotating casing 44, the sealing groove 452 is formed with two opposite sealing grooves 452, the two sealing grooves 452 are located at two sides of the vent groove 451, a sealing ring 453 is disposed inside the sealing groove 452, the sealing ring 453 can increase the sealing performance at two sides of the vent groove 451 when the rotating casing 44 and the fixing casing 45 rotate, so as to reduce the possibility of air leakage of high-pressure air through the vent groove 451, the two limiting grooves 454 are formed with two opposite limiting grooves 454, the two limiting grooves 454 are respectively disposed at one side of the sealing groove 452 away from the vent groove 451, a limiting ring 455 is disposed inside the limiting groove 454, the limiting ring 455 is made of a hard material, the limiting ring 455 can increase the sealing performance between the rotating casing 44 and the fixing casing 45, and can limit the sealing ring 453 to reduce mutual rotation between the rotating casing 44 and the fixing casing 45, the possibility that the seal ring 453 is dropped off from the rotation case 44.
Referring to fig. 2 and 3, a fixing flange 456 is arranged above the fixing shell 45, the upper end of the fixing flange 456 is fixedly connected with a machine body of the driving head, the bottom end of the fixing flange 456 is detachably connected with the fixing shell 45, the fixing shell 45 is fixedly connected with the machine body of the driving head of the long spiral drilling machine through the fixing flange 456, a limiting ring 455 is fixedly connected below the fixing shell 45, the rotating shell 44 is limited inside the fixing shell 45 through the limiting ring 455 and the machine body of the driving head, the rotating shell 44 is fixedly connected with an output shaft of the driving head, and the driving head drives the rotating shell 44 to rotate through the output shaft.
To sum up, the application process of this application is: the method comprises the steps of drilling a hole on the ground of muddy sandstone soil by using a long spiral drilling machine, enabling an air compressor 31 to work when a drill rod 1 is screwed into a hard stratum structure such as underground muddy sandstone, continuously pumping air into a high-pressure air storage tank 32, then opening an air outlet end valve of the high-pressure air storage tank 32, enabling high-pressure air in the high-pressure air storage tank 32 to enter an air inlet pipeline 42, enabling the high-pressure air to enter a ventilation groove 451 between a rotating shell 44 and a fixed shell 45 from the air inlet pipeline 42, then enabling the high-pressure air to enter an air outlet pipeline 41 and a high-pressure ventilation pipe 2 from the ventilation groove 451, finally enabling the high-pressure air to enter the ground from the high-pressure ventilation pipe 2 and to be diffused upwards along a spiral blade 12, and scattering the underground structure which is locked with the spiral blade 12 and a hollow shaft 11 until the hollow shaft 11 and the spiral blade 12 are screwed into the ground to a certain depth.
The embodiment of the application also discloses a construction method of the air-entrapping CFG pile, which is used for drilling by using the long spiral drilling machine and comprises the following steps:
s1, processing the ground to be flat so as to facilitate the construction of the long auger drilling machine and carry out measurement lofting;
s2, moving the long spiral drilling machine to a lofting area, starting the long spiral drilling machine and drilling towards the underground, and opening a valve at an air outlet of the high-pressure air storage tank 32 when the drill rod 1 is screwed into an underground hard stratum to enable high-pressure air to flow to the high-pressure vent pipe 2 until the drill rod 1 reaches a certain depth;
s3, pumping concrete into the hole through the hollow shaft 11 of the drill rod 1, and simultaneously pulling out the drill rod 1 at a constant speed;
and S4, if the CFG pile is designed with a reinforcement cage, vibrating the reinforcement cage into the concrete pile through a vibration hammer.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. The utility model provides a long auger drilling machine, includes drilling rod (1), and drilling rod (1) includes hollow shaft (11) and helical blade (12), and helical blade (12) set up on the global of hollow shaft (11), its characterized in that: including vertical high-pressure vent pipe (2) that sets up on hollow shaft (11) and can be to high-pressure gas device (3) of inside transport high-pressure air of high-pressure vent pipe (2), high-pressure gas device (3) are linked together with the upper end of high-pressure vent pipe (2), and the bottom setting of high-pressure vent pipe (2) is in the position that is close to hollow shaft (11) bottom.
2. A long auger drilling machine according to claim 1, wherein: the high-pressure vent pipe (2) penetrates through the helical blade (12), the peripheral surface of the high-pressure vent pipe (2) is abutted against the peripheral surface of the hollow shaft (11), and the high-pressure vent pipe (2) is fixedly connected with the helical blade (12) and the hollow shaft (11) respectively.
3. A long auger drilling machine according to claim 2, wherein: the high-pressure gas making device (3) comprises an air compressor (31) and a high-pressure gas storage tank (32) with a valve, the air compressor (31) is communicated with one end of the high-pressure gas storage tank (32), and a gas outlet with a valve of the high-pressure gas storage tank (32) is communicated with the high-pressure vent pipe (2).
4. A long auger drilling machine according to claim 1, wherein: a connecting device (4) is arranged between the high-pressure gas making device (3) and the high-pressure vent pipe (2), and the connecting device (4) comprises a gas outlet pipeline (41) capable of rotating along with the high-pressure vent pipe (2), a gas inlet pipeline (42) connected with the high-pressure gas making device (3) and a gas conveying assembly (43) used for connecting the gas outlet pipeline (41) and the gas inlet pipeline (42).
5. The long auger drilling machine of claim 4, wherein: gas conveying subassembly (43) are including rotating shell (44) and set casing (45), it is connected with hollow shaft (11) to rotate shell (44), air channel (451) have been seted up on the global of rotating shell (44), air channel (451) are linked together with outlet duct (41), set casing (45) cover is established and is rotated the shell (44) outside, the outer wall of rotating shell (44) and the inner wall looks butt of set casing (45), and rotate shell (44) and can rotate in set casing (45) inside, inlet duct (42) set up on set casing (45) and be linked together with air channel (451).
6. The long auger drilling machine of claim 5, wherein: a fixing flange (456) is arranged on the upper end face of the fixing shell (45).
7. The long auger drilling machine of claim 6, wherein: a sealing ring (453) is arranged between the rotating shell (44) and the fixed shell (45), and the sealing ring (453) is provided with two sides which are respectively positioned on the vent groove (451).
8. A long auger drilling machine according to claim 7, wherein: limiting rings (455) are respectively arranged at two ends of the two sealing rings (453) which are far away from each other.
9. A long auger drilling machine according to claim 1, wherein: the edge of the helical blade (12) far away from the hollow shaft (11) is provided with a protective rib (13).
10. A construction method of an aerated CFG pile is characterized by comprising the following steps: drilling construction with the long auger drilling machine according to any one of claims 1 to 9, comprising the steps of:
s1, processing the ground to be flat, and performing measurement lofting;
s2, drilling holes underground by using the drill rod (1) in the lofting area, and opening a valve at an air outlet of the high-pressure air storage tank (32) when the drill rod (1) is screwed into an underground hard stratum to enable high-pressure air to flow to the high-pressure vent pipe (2) until the drill rod (1) reaches a certain depth;
and S3, pumping the concrete into the hole through the drill rod (1), and pulling out the drill rod (1) at a constant speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110205543.7A CN113153191A (en) | 2021-02-24 | 2021-02-24 | Long spiral drilling machine and construction method of air-entrapping CFG pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110205543.7A CN113153191A (en) | 2021-02-24 | 2021-02-24 | Long spiral drilling machine and construction method of air-entrapping CFG pile |
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Application publication date: 20210723 |