CN111155935B - Drilling device for liquefying saturated soil - Google Patents
Drilling device for liquefying saturated soil Download PDFInfo
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- CN111155935B CN111155935B CN202010068664.7A CN202010068664A CN111155935B CN 111155935 B CN111155935 B CN 111155935B CN 202010068664 A CN202010068664 A CN 202010068664A CN 111155935 B CN111155935 B CN 111155935B
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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
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
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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
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/14—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using liquids and gases, e.g. foams
Abstract
The invention discloses a drilling device for liquefying saturated soil, which comprises: the drilling rod comprises an inner rod and an outer rod which are coaxially arranged, a plurality of water spray ports are formed in the bottom of the drilling rod and communicated to the inner rod, a plurality of air spray ports are formed in the side of the bottom end of the outer rod and communicated to the position between the outer rod and the inner rod, spiral blades are arranged on the lower portion of the outer rod, and a cutting disc is fixed in the middle of the outer rod. The invention has the advantages that the earth is quickly broken and the slag is discharged in the form of gas-liquid mixture, and the efficient positive circulation drilling is realized.
Description
Technical Field
The invention relates to an earth drilling device, in particular to a drilling device for liquefying saturated soil.
Background
With the rapid advance of urban construction, the construction land is more and more tense, the price is high, and some land is remarkably high. In urban construction and transformation, soft soil foundations with high underground water level and relatively large foundation soil softness degree of wet lands such as old riverways and mudflats are often abandoned by developers. This is not in accordance with the policy of making full use of land resources, saving land and continuing development.
Through a scientific construction method and technology, the wading soft soil foundation is developed and applied, so that the original waste land is changed into a treasure land, and the method has profound significance for implementing national policies on saving land resources to the maximum extent and protecting the ecological environment of human beings. For the wading soft soil which is a liquefied saturated land, the foundation is usually constructed by grouting after drilling and wall fixing by underwater guniting to form a pile, and the technology plays a very important role in applying wetland foundations such as riverways, mudflats and the like. For the liquefied saturated soil of the type, the drilling is different from other types of soil quality, and the operation is usually carried out by using a submersible drilling machine, for example, the prior art publication No. CN105672877A discloses a submersible drilling machine for positive circulation deslagging, which comprises a square drill rod, an overground transverse constraint is arranged between the square drill rod and pile foundation equipment, a speed change mechanism driven by a motor is arranged at the bottom end of the square drill rod, a drill rod is connected to the bottom end of the speed change mechanism, a conical drill bit is arranged at the upper part of the drill rod, and a drill bit tip is arranged at the bottom of the drill rod; the length from the bottom end of the drill rod to the bottom end of the conical drill is 0.6-3.0 m or about 1-3 times of the diameter of the conical drill; an input port is arranged on the side surface of the drilling machine, and communicated axial pipelines are arranged at the joint from the input port to the drill bit rod and in the drill bit rod; the outer side surface of the drill bit rod is provided with a slag discharge groove. The conical drill bit rotates and drills downwards under the upper and lower horizontal constraints, and the perpendicularity of the formed hole is guaranteed. The drill bit continuously stirs the earth-rock drill into drill slag which can be carried out of the hole opening through the airflow and the water/slurry circulating flow under the action of the airflow and the water/slurry circulating flow, and finally a vertical round hole with a specified size and a verticality meeting the requirement is drilled. The drilling machine for drilling and deslagging in the positive circulation has certain defects, the drainage route of the slurry is relatively direct, the efficiency of carrying broken slag and the carrying amount are not ideal, and meanwhile, the operation performance of the slurry in the hole is not in the most efficient state due to the matched operation mode of firstly inputting air flow and then inputting the slurry.
Disclosure of Invention
The invention aims to provide a drilling device for liquefied saturated soil, which can rapidly break soil and remove slag in a gas-liquid mixture mode and realize high-efficiency positive circulation drilling.
The invention is realized by the following technical scheme.
A drilling apparatus for liquefying saturated soil, comprising: the drilling rod comprises an inner rod and an outer rod which are coaxially arranged, a plurality of water spray ports are formed in the bottom of the drilling rod and communicated to the inner rod, a plurality of air spray ports are formed in the side of the bottom end of the outer rod and communicated to the position between the outer rod and the inner rod, spiral blades are arranged on the lower portion of the outer rod, and a cutting disc is fixed in the middle of the outer rod.
The drill rod is divided into an inner rod and an outer rod, the drill tip rotationally cuts soil in liquefied saturated soil, the inner rod serves as a water channel to spray high-pressure water from the bottom of the drill rod through a water spray nozzle, a space between the outer rod and the inner rod serves as an air channel to spray high-pressure air flow from the side of the bottom of the outer rod through the air spray nozzle to form a gas-liquid mixture, and the cutting disc in the middle of the outer rod continuously rotationally cuts gradually liquefied soil.
Furthermore, the included angle between the drilling teeth fixed on the drilling petals and the horizontal plane is gradually increased from top to bottom, each drilling petal is provided with at least three drilling teeth, the included angle between the drilling tooth positioned at the lowest position and the horizontal plane is 70-80 degrees, and the included angle between the drilling tooth positioned at the highest position and the horizontal plane is 10-20 degrees.
The drilling teeth of the scraper plate gradually transition from the top to the bottom in a relatively horizontal outward direction to a relatively vertical downward direction, and the contact area between the drilling teeth of the drilling tip and soil can be increased.
Further, the cutting disc comprises a disc body and a plurality of scraping plates, the disc body is fixed on the outer rod, a plurality of hollowed-out areas are arranged on the disc body, the hollowed-out areas are located in the area, where the middle of the disc body is located, of the disc body, the inner ends of the scraping plates are fixed in the middle of the disc body, the outer ends of the scraping plates are fixed on the periphery of the disc body, and a plurality of drilling teeth are fixed at the bottom of the scraping plates.
The hollow area of the inner ring can enable the gas-liquid mixture to be rapidly discharged upwards, and the scraper of the outer ring carries out rotary cutting on the soil.
Furthermore, the height of the inner end of the scraper is smaller than that of the outer end of the scraper, and the scraper is fixed on the bottom surface of the disc body.
The scraper blade with the structure can cut soil and simultaneously squeeze and push peripheral soil inwards.
Furthermore, the bottom edge of the scraper is in an inwards concave arc shape, and the direction of the drill teeth is perpendicular to a tangent line of the drill teeth corresponding to the bottom edge.
The arrangement enables the scraper blade to gradually increase the tendency of pushing and pushing the cut soil from the inner end to the outer end to the inner periphery.
Further, the drill teeth at the bottom of the scraper are fixed on two side surfaces of the scraper in a staggered mode, the drill teeth are arranged obliquely relative to the scraper, the cutting angle is 5-30 degrees, and the inclination angle of each drill tooth is the same.
Furthermore, an underreaming mechanism is fixed to the upper portion of the outer rod and comprises a first locating ring, a second locating ring and a plurality of inclined scrapers, the first locating ring and the second locating ring are fixed to the drill rod and coaxial with the drill rod, the first locating ring is higher than the second locating ring, the caliber of the first locating ring is larger than that of the second locating ring, the top end and the lower end of each inclined scraper are fixed to the first locating ring and the second locating ring respectively, and a plurality of drilling teeth are fixed to the side face, facing the rotation direction of the drill rod, of each inclined scraper.
The drilling and cutting mechanism is arranged, so that secondary more detailed drilling and cutting can be performed on the gas-liquid mixture discharged by cutting through the cutting disc, and the effect similar to stirring can be generated on the gas-liquid mixture.
Furthermore, the drilling and cutting mechanism further comprises a fixing sleeve, the fixing sleeve is sleeved and fixed on the outer rod, and the first positioning ring and the second positioning ring are fixed on the fixing sleeve through connecting rods.
Furthermore, a plurality of scraping rods are fixedly connected between the oblique scraper and the fixing sleeve, a plurality of scraping blades are fixed on the scraping rods, the upper portions of the scraping blades are located above the scraping rods, the lower portions of the scraping blades are located below the scraping rods, and the scraping blades are perpendicular to a vertical plane where the scraping rods are located.
The scraping rod and the scraping blade are arranged between the oblique scraper and the sleeve, the stirring performance of the drilling and cutting mechanism can be improved by the scraping rod, and the drilling and cutting performance of the drilling and cutting mechanism can be improved by the scraping blade.
Furthermore, the scraping blade and the scraping rod form an included angle, the upper portion of the scraping blade is inclined towards the outer end of the scraping rod, the included angles between the scraping rod and the scraping blade are the same, the included angles between the scraping rod and the scraping blade from bottom to top are gradually reduced, at least three scraping rods are arranged, the included angle between the scraping rod located at the lowest position and the scraping blade is 10-20 degrees, and the included angle between the scraping rod located at the highest position and the scraping blade is 50-60 degrees.
In the rotary drilling and cutting process of the drilling and cutting mechanism, the scraping blade positioned below has the capacity of pushing the gas-liquid mixture to the periphery, so that the gas-liquid mixture in the space where the drilling and cutting mechanism is positioned is homogenized, the height of the drilling rod is increased, the pushing trend is gradually reduced, and finally the gas-liquid mixture positioned at the upper part of the drilling and cutting mechanism is upwards discharged in a relatively even distribution, and the forward-circulation deslagging is completed.
The invention has the beneficial effects that:
after the ground is broken, a gas-liquid mixture is quickly formed at the bottom of the drill bit and is upwards discharged in a spiral diffusion mode, positive-cycle slag discharging is completed through the cutting disc and the drilling and cutting mechanism, the gas-liquid mixture is quickly diffused, the drilling slag carrying capacity is high, the overall slag discharging efficiency is high, and the using effect is good.
Drawings
FIG. 1 is a schematic elevation view of a drilling apparatus for liquefying saturated soil;
FIG. 2 is a schematic front view of a drill bit;
FIG. 3 is a front cross-sectional view of the bottom of the drill pipe;
FIG. 4 is a schematic top view of a cutting disk;
FIG. 5 is a front view of the cutting disk;
FIG. 6 is a schematic top view of the drill mechanism;
fig. 7 is a front cross-sectional view of a drill-cut structure.
Detailed Description
The invention is explained in more detail below with reference to the figures and examples.
Referring to fig. 1 to 7, a drilling apparatus for liquefying saturated soil includes: the drilling rod 1, the drill bit 2, the cutting disc 3 and the drilling and cutting mechanism 4. The drill bit 2 is fixedly arranged at the bottom end of the drill rod 1, the cutting disc 3 is fixed in the middle of the drill rod 1, and the drilling and cutting mechanism 4 is fixed at the upper part of the drill rod 1.
For the drill bit 2, the drill tip of the four drill petals 21 of the drill bit 2 has at least three drill petals 21, usually three or four drill petals 21, and more than four drill petals are preferably arranged for the soil with more rocks, so that the force required for breaking the soil can be satisfied by arranging four drill petals, because the liquefied saturated soil is used in the present embodiment. The drill bit 21 is fixed with a plurality of drill teeth 22, in the embodiment, the drill teeth 22 are tungsten steel drill teeth, tungsten carbide, cobalt carbide, niobium carbide, titanium carbide and tantalum carbide are common components of tungsten steel, the tungsten steel has a series of excellent performances such as high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and the like, particularly the high hardness and the wear resistance of the tungsten steel are basically kept unchanged even at the temperature of 500 ℃, and the tungsten steel still has high hardness at the temperature of 1000 ℃. Therefore, the tungsten steel is more suitable for the complex working environment of the drill bit 2 and has better breakthrough drilling performance. Usually at least three drill teeth 22 are provided per drilling lamella 21, in the present embodiment four in combination with the soil properties and the drilling requirements. In order to increase the contact area between the drilling teeth of the drill tip and the soil and improve the soil breaking efficiency and the soil breaking range of the drill tip, the included angle between the drilling teeth 22 fixed on the drill petal 21 and the horizontal plane is gradually increased from top to bottom, the included angle between the drilling tooth 22 positioned at the lowest position and the horizontal plane is 70-80 degrees, the included angle between the drilling tooth 22 positioned at the highest position and the horizontal plane is 10-20 degrees, in the embodiment, the included angles between the drilling tooth 22 and the horizontal plane are respectively 20 degrees, 40 degrees, 60 degrees and 80 degrees from the highest position to the lowest position, and the included angles are gradually increased in an equal difference mode. Intuitively, the drill teeth 22 gradually transition from a horizontal outward pointing direction to a vertical downward pointing direction from top to bottom.
The drilling rod 1 comprises an inner rod 11 and an outer rod 12 which are coaxially arranged, four water spraying ports 11-A are arranged at the bottom of the drilling rod 1 and communicated to the inner rod 11, the four water spraying ports 11-A are respectively positioned between two adjacent drilling petals 21, the spraying directions of the water spraying ports 11-A are slightly inclined outwards, and high-pressure water sprayed out through the water spraying ports 11-A can be rapidly diffused to the periphery below the bottom of the drilling rod 1. The drill point head rotates to cut soil in the liquefied saturated soil, soil is quickly broken to form soil particles, soil blocks, drill residues and the like, the inner rod 11 serves as a water channel to spray high-pressure water from the bottom of the drill rod 1 through the water spray opening 11-A, and the high-pressure water can be quickly mixed with the soil particles in the hole to form slurry due to the fact that the liquefied saturated soil is high in moisture content, and the slurry is quickly diffused from the bottom of the drill rod 1 to the periphery.
Four air nozzles 12-A are arranged on the side of the bottom end of the outer rod 12 and communicated between the outer rod 12 and the inner rod 11, the lower part of the outer rod 12 is provided with a helical blade 121, and the middle part of the outer rod 12 is fixed with a cutting disc 3. The space between the outer rod 12 and the inner rod 11 is used as an air passage and is sprayed from the side of the bottom of the outer rod 12 through an air nozzle 12-A to be mixed with slurry to form a gas-liquid mixture and accelerate the gas-liquid mixture to diffuse to the periphery, the gas-liquid mixture spirally rises along with the spiral blade 121 in a gradual diffusion mode and carries drilling slag and other substances along with the continuous rotation of the drill rod 1 and the drill tip, due to the holding effect of the high-pressure air flow, the water has the tendency of diffusing to the outside, namely, the soil is gradually liquefied from the inner periphery to the periphery, and the cutting disc 3 in the middle of the outer rod 12 continuously performs rotary cutting on the gradually liquefied soil.
Obviously, the inner rod 11 is required to be externally connected with a high-pressure water source as a water channel, and high-pressure air is required to be externally connected between the inner rod 11 and the outer rod 12 as an air channel. In order to improve the overall strength of the drill rod 1 and the structural stability between the inner rod 11 and the outer rod 12, the reinforcing rods 13 are fixedly connected between the outer rod 12 and the inner rod 11, the reinforcing rods 13 can be arranged at equal intervals according to the height of the drill rod 1, the intervals can be set to be 20-30cm, the number of the reinforcing rods 13 is reasonably set according to the actual length of the drill rod 1 and the intervals of the reinforcing rods 13, the reinforcing rods 13 at the same layer height are not required to be set too much, and generally three or four reinforcing rods 13 are required to be set, so that the flow rate of high-pressure air flow at the position is not influenced by too much setting.
For the cutting disc 3, the cutting disc 3 includes a disc body 31 and four scrapers 32, the disc body 31 is fixed to the outer rod 12, the disc body 31 is provided with four hollow-out areas 310, the hollow-out areas 310 are located in an area where the inner periphery of the disc body 31 belongs to, the inner ends of the scrapers 32 are fixed to the middle of the disc body 31, the outer ends of the scrapers 32 are fixed to the periphery of the disc body 31, a plurality of drilling teeth 33 are fixed to the bottom of the scrapers 32, and the drilling teeth 33 are tungsten steel drilling teeth.
Set up disk body 31 into two regions, the inner circle sets up fretwork district 310, and the outer lane sets up scraper blade 32 and is as the working part, and the scraper blade 32 of outer lane then carries out the rotary cutting to soil, and the fretwork district 310 of inner circle can make the earth and the gas-liquid mixture of cutting upwards discharge rapidly.
In this embodiment, the four scraping plates 32 are symmetrically arranged with respect to the drill rod 1, that is, the included angle between the adjacent scraping plates 32 is 90 °, and the four hollow-out areas 310 are also symmetrically arranged with respect to the drill rod 1 and are located in the area between the adjacent scraping plates 32, the hollow-out areas 310 are in a fan shape, and the plate body 31 between the adjacent hollow-out areas 310 is in a long strip shape, so that the thickness of the plate body can be increased to serve as a reinforcing rib to support the structural strength of the cutting disc 3. The number of the scrapers 32 and the hollow-out areas 310 may be three or more, the number is mainly set according to the cutting strength required by the cutting disk 3, and generally, the number of the scrapers 32 is not less than three.
The inner end of the scraper 32 is lower than the outer end of the scraper 32, the scraper 32 is fixed on the bottom surface of the disc body 31, and the scraper 32 with the structure can cut soil and extrude and push peripheral soil inwards, so that the peripheral soil can contact with and partially mix with gas-liquid mixture in the inner periphery, the liquefaction speed is increased, slurry is gradually formed and is upwards discharged from the hollow area 310.
In order to further enhance the soil cutting and pushing performance, the bottom edge 32-A of the scraper 32 is in a concave arc shape, and the direction of the drill teeth 33 is perpendicular to the tangent line of the drill teeth 33 corresponding to the bottom edge 32-A. The bottom edge 32-A of the scraper 32 is set to be an inwards concave arc line and the angle of the drill teeth 33 is set, so that the trend that the scraper 32 pushes and pushes the cut soil from the inner end to the outer end to the inner periphery is gradually enhanced, and the contact efficiency of the soil and the gas-liquid mixture can be improved.
For the enhancement of the cutting performance of the scraper 32, the drill teeth 33 at the bottom of the scraper 32 are fixed on two sides of the scraper 32 in a staggered manner, the drill teeth 33 are arranged obliquely relative to the scraper 32, the cutting angle is 5-30 degrees, and the inclination angle of each drill tooth 33 is the same. The arrangement of the drilling teeth 33 on the scraper 32 is set to be in a left-right staggered mode, so that the contact area of the scraper 32 and soil can be enlarged, the cutting capacity is improved, the structural strength of the bottom of the scraper 32 can be improved, and the damage strength is reduced.
For the drilling and cutting mechanism 4 fixed on the upper portion of the outer rod 12, the drilling and cutting mechanism 4 includes a first positioning ring 41, a second positioning ring 42, a fixing sleeve 43, four inclined scrapers 44 and a plurality of scrapers 45, the fixing sleeve 43 is sleeved and fixed on the outer rod 12, the fixing sleeve 43 can be fixed on the outer rod 12 by welding or riveting, if a riveting fixing mode is used, considering that an air passage is formed between the outer rod 12 and the inner rod 11, the sealing performance needs to be improved by adopting an interference sealing riveting mode. The first positioning ring 41 and the second positioning ring 42 are coaxial with the drill rod 1 and are all fixed on the fixing sleeve 43 through a connecting rod 40, the first positioning ring 41 is higher than the second positioning ring 42, the caliber of the first positioning ring 41 is larger than that of the second positioning ring 42, the top ends and the lower ends of the four inclined scrapers 44 are respectively fixed on the first positioning ring 41 and the second positioning ring 42, the four inclined scrapers 44 are symmetrically arranged relative to the drill rod 1, the number of the inclined scrapers 44 is determined according to actual conditions and is usually not less than three, a plurality of drill teeth 441 are fixed on the side surface of the inclined scrapers 44 facing the rotation direction of the drill rod 1, and the drill teeth 441 are made of tungsten steel.
The drilling and cutting mechanism 4, which is a working part of the last step of the drilling device, performs secondary and more detailed drilling and cutting on the gas-liquid mixture discharged by cutting through the cutting disc 3, and can generate an effect similar to stirring on the gas-liquid mixture, so as to promote dissolution of soil particles, soil blocks and water and improve the slurrying degree of the gas-liquid mixture.
Four scraping rods 45 are fixedly connected between the inclined scraper 44 and the fixed sleeve 43, a plurality of scraping blades 451 are fixed on the scraping rods 45, the scraping rods 45 and the scraping blades are arranged between the inclined scraper 44 and the fixed sleeve 43, the scraping rods 45 can improve the stirring performance of the drilling and cutting mechanism 4, and the scraping blades 451 can improve the drilling and cutting performance of the drilling and cutting mechanism 4. Because the length of each scraping bar 45 is different, the quantity of the scraping blades fixed by each scraping bar 45 is different, but the distance between the horizontally adjacent scraping blades 451 is generally the same, the upper part of each scraping blade 451 is positioned above the scraping bar 45, the lower part of each scraping blade 451 is positioned below the scraping bar 45, and the scraping blades 451 are perpendicular to the vertical plane where the scraping bars 45 are positioned.
For the scraping blade 451, an included angle is formed between the scraping blade 451 and the scraping rod 45, the upper portion of the scraping blade 451 is inclined towards the outer end of the scraping rod 45, the included angle between the scraping rod 45 and the scraping blade 451 is the same at the same height, the included angle between the scraping rod 45 and the scraping blade 451 from bottom to top is gradually reduced, the included angle between the scraping rod 45 located at the lowest position and the scraping blade 451 is 20 degrees, the included angle between the scraping rod 45 located at the highest position and the scraping blade 451 is 50 degrees, the included angles between the scraping rod 45 and the scraping blade 451 from bottom to top are respectively 20 degrees, 30 degrees, 40 degrees and 50 degrees, and the included angles are gradually increased in a climbing manner.
The angle between the scraping blades 451 and the scraping rods 45 is set, so that the scraping blades 451 positioned below the drilling and cutting mechanism 4 have the capability of pushing the gas-liquid mixture to the periphery in the rotary drilling and cutting process, so that the gas-liquid mixture in the space where the drilling and cutting mechanism 4 is located is homogenized, the height of the drilling rod 1 is increased, the pushing trend is gradually reduced, and finally the gas-liquid mixture positioned at the upper part of the drilling and cutting mechanism 4 is upwards discharged in a relatively even distribution, and the forward circulation deslagging is completed.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (8)
1. A drilling apparatus for liquefying saturated soil, comprising: the drill bit is a drill point head with at least three drilling petals, a plurality of drilling teeth are fixed on the drilling petals, the drill rod comprises an inner rod and an outer rod which are coaxially arranged, a plurality of water outlets are formed in the bottom of the drill rod and communicated with the inner rod, a plurality of air nozzles are formed in the side of the bottom end of the outer rod and communicated between the outer rod and the inner rod, a helical blade is arranged at the lower part of the outer rod, and a cutting disc is fixed in the middle of the outer rod; the cutting disc comprises a disc body and a plurality of scraping plates, the disc body is fixed on the outer rod, a plurality of hollowed-out areas are arranged on the disc body and are positioned in an area which is surrounded to the middle of the disc body, the inner ends of the scraping plates are fixed in the middle of the disc body, the outer ends of the scraping plates are fixed on the periphery of the disc body, and a plurality of drilling teeth are fixed at the bottom of the scraping plates; the height of the inner end of the scraper is smaller than that of the outer end of the scraper, and the scraper is fixed on the bottom surface of the tray body.
2. The drilling device for liquefying saturated soil according to claim 1, wherein the drilling teeth fixed on the drilling petals gradually increase in angle with the horizontal plane from top to bottom, each drilling petal is provided with at least three drilling teeth, the drilling tooth at the lowest position forms an angle of 70-80 degrees with the horizontal plane, and the drilling tooth at the highest position forms an angle of 10-20 degrees with the horizontal plane.
3. The drilling device for liquefying saturated soil according to claim 1, wherein the bottom edge of the scraper is in a concave arc shape, and the direction of the drill teeth is perpendicular to a tangent line of the drill teeth at the position corresponding to the bottom edge.
4. The drilling device for liquefying saturated soil according to claim 3, wherein the drilling teeth at the bottom of the scraper are fixed on two sides of the scraper in a staggered manner, the drilling teeth are arranged obliquely relative to the scraper, the tangential angle is 5-30 degrees, and the inclination angle of each drilling tooth is the same.
5. The drilling device for liquefying saturated soil according to claim 1, wherein an under-drill cutting mechanism is fixed on the upper part of the outer rod, the under-drill cutting mechanism comprises a first positioning ring, a second positioning ring and a plurality of oblique scrapers, the first positioning ring and the second positioning ring are fixed on the drill rod and are coaxial with the drill rod, the first positioning ring is higher than the second positioning ring, the caliber of the first positioning ring is larger than that of the second positioning ring, the top end and the lower end of each oblique scraper are respectively fixed on the first positioning ring and the second positioning ring, and a plurality of drill teeth are fixed on the side surface, facing the rotation direction of the drill rod, of each oblique scraper.
6. The drilling device for liquefying saturated soil according to claim 5, wherein the drilling and cutting mechanism further comprises a fixing sleeve, the fixing sleeve is sleeved and fixed on the outer rod, and the first positioning ring and the second positioning ring are fixed on the fixing sleeve through connecting rods.
7. The drilling device for liquefying saturated soil according to claim 6, wherein a plurality of scraping rods are fixedly connected between the oblique scraping blades and the fixing sleeve, a plurality of scraping blades are fixed on the scraping rods, the upper parts of the scraping blades are positioned above the scraping rods, the lower parts of the scraping blades are positioned below the scraping rods, and the scraping blades are perpendicular to a vertical plane in which the scraping rods are positioned.
8. The drilling device for liquefying saturated soil according to claim 7, wherein the scraping blades and the scraping rods have included angles, the upper parts of the scraping blades are inclined towards the outer ends of the scraping rods, the scraping rods at the same height have the same included angles with the scraping blades, the included angles between the scraping rods and the scraping blades from bottom to top are gradually reduced, the number of the scraping rods is at least three, the included angle between the scraping rod at the lowest position and the scraping blade is 10-20 degrees, and the included angle between the scraping rod at the highest position and the scraping blade is 50-60 degrees.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010068664.7A CN111155935B (en) | 2020-01-21 | 2020-01-21 | Drilling device for liquefying saturated soil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010068664.7A CN111155935B (en) | 2020-01-21 | 2020-01-21 | Drilling device for liquefying saturated soil |
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| CN111155935A CN111155935A (en) | 2020-05-15 |
| CN111155935B true CN111155935B (en) | 2022-02-15 |
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| CN205936422U (en) * | 2016-08-17 | 2017-02-08 | 曲春林 | Double -walled drilling rod |
| CN106894769B (en) * | 2017-03-06 | 2019-06-21 | 中国石油大学(华东) | A kind of fast joint type double-layer drill rod |
| CN206816180U (en) * | 2017-05-25 | 2017-12-29 | 中铁建大桥工程局集团第四工程有限公司 | A kind of boring three wings drag bit |
| CN108104737A (en) * | 2018-02-06 | 2018-06-01 | 高九华 | The self-positioning drilling rod of binary channels |
| CN109882092A (en) * | 2019-03-25 | 2019-06-14 | 无锡市安曼工程机械有限公司 | Two fluid grouting drilling tool |
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2020
- 2020-01-21 CN CN202010068664.7A patent/CN111155935B/en active Active
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Denomination of invention: Drilling device for liquefied saturated soil Effective date of registration: 20220810 Granted publication date: 20220215 Pledgee: Zhejiang Tailong Commercial Bank Co.,Ltd. Huzhou balidian small and micro enterprise franchise sub branch Pledgor: ZHEJIANG QIAOXING CONSTRUCTION GROUP Co.,Ltd. Registration number: Y2022330001707 |
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Date of cancellation: 20230906 Granted publication date: 20220215 Pledgee: Zhejiang Tailong Commercial Bank Co.,Ltd. Huzhou balidian small and micro enterprise franchise sub branch Pledgor: ZHEJIANG QIAOXING CONSTRUCTION GROUP Co.,Ltd. Registration number: Y2022330001707 |