CN111810079A - Double-liquid rotary jet drilling tool and double-liquid rotary jet grouting reinforcement method - Google Patents
Double-liquid rotary jet drilling tool and double-liquid rotary jet grouting reinforcement method Download PDFInfo
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- CN111810079A CN111810079A CN202010695678.1A CN202010695678A CN111810079A CN 111810079 A CN111810079 A CN 111810079A CN 202010695678 A CN202010695678 A CN 202010695678A CN 111810079 A CN111810079 A CN 111810079A
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- 238000005553 drilling Methods 0.000 title claims abstract description 61
- 239000007788 liquid Substances 0.000 title claims abstract description 36
- 230000002787 reinforcement Effects 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000012530 fluid Substances 0.000 claims abstract description 82
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 11
- 239000012466 permeate Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 67
- 238000002347 injection Methods 0.000 claims description 61
- 239000007924 injection Substances 0.000 claims description 61
- 239000004568 cement Substances 0.000 claims description 49
- 239000002002 slurry Substances 0.000 claims description 45
- 238000005507 spraying Methods 0.000 claims description 35
- 238000007789 sealing Methods 0.000 claims description 27
- 239000007921 spray Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 2
- 230000009977 dual effect Effects 0.000 claims 6
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000011440 grout Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
- E21B10/61—Drill bits characterised by conduits or nozzles for drilling fluids characterised by the nozzle structure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B17/18—Pipes provided with plural fluid passages
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention provides a double-liquid rotary jet drilling tool and a double-liquid rotary jet grouting reinforcement method, which are used for solving the problem of multi-directional drilling grouting reinforcement. The double-liquid rotary jet grouting reinforcement method is realized through a double-liquid rotary jet drilling tool, a first high-pressure fluid is conveyed through an inner cavity of an inner drill rod, a second high-pressure fluid is conveyed through an annular gap between the inner drill rod and an outer drill rod and is simultaneously sprayed, the second high-pressure fluid rapidly permeates into a hole wall under the impact of the first high-pressure fluid, and meanwhile, the first high-pressure fluid and the second high-pressure fluid are mixed to jointly complete grouting reinforcement on a drilled hole. The invention transmits the power of the drill bit and transmits high-pressure double liquid at the same time, the inner hollow drill rod and the outer hollow drill rod realize ultrahigh-pressure transmission, can finish the reinforcement of the drill hole in different directions and cannot be limited to the vertical direction; the inner hollow drill rod and the outer hollow drill rod can be disassembled and assembled at once, so that the maintenance and the carrying are convenient; the cutting of the first high-pressure fluid and the osmosis of the second high-pressure fluid are carried out simultaneously, and the two fluids can be mixed with each other, so that the reinforcing effect is good.
Description
Technical Field
The invention belongs to the field of constructional engineering and drilling tool equipment, and particularly relates to a double-liquid rotary jet drilling tool and a double-liquid rotary jet grouting reinforcement method.
Background
In the construction earlier stage of tunnel engineering, ocean engineering or well drilling, especially when the engineering meets soft soil, the built building can not be borne or the natural invasion can not be resisted. Therefore, it is necessary to reinforce the foundation or the wall surface to be constructed. Conventionally, a hole is drilled in a construction surface by a drill, and at the same time, a cement slurry is sprayed by a drill bit with a nozzle to the drilled hole. At present, a single-liquid or double-liquid rotary jet drilling tool adopted for reinforcing a construction surface is generally provided with a pipeline in the drilling tool, reinforcing materials are conveyed through the pipeline, rotary jet is carried out at a drill bit, and the reinforcement of a drill hole is completed.
The application number is 201520565524.5's chinese patent, discloses a biliquid type high pressure spouts machine soon, through sodium silicate pipeline and grout pipeline, carries the discharge gate of drill bit bottom with two kinds of materials simultaneously, and two kinds of materials intensive mixing when spouting soon accelerates the solidification of grout, improves cement slip casting effect. However, the cement slurry is conveyed by the pipeline, the vertical drilling direction is generally required to be kept, when the cement slurry is required to be drilled in other directions, the pipeline is extremely easy to block, when the cement slurry is blocked, the conveying pipeline needs to be replaced, and the difficulty in equipment maintenance is high.
Disclosure of Invention
In order to solve the problem of multi-directional drilling reinforcement, the embodiment of the invention provides a double-fluid rotary jet drilling tool and a double-fluid rotary jet grouting reinforcement method. The dual-liquid conveying mode of the inner hollow drill rod and the outer hollow drill rod can finish the reinforcement of the drill hole in different directions, is not limited in the vertical direction, and realizes ultrahigh-pressure multi-angle rotary spraying of the drill hole; meanwhile, the equipment can be disassembled and assembled immediately, and is convenient to maintain and carry; the cutting of high-pressure water and the infiltration of high-pressure cement slurry are carried out simultaneously, and the reinforcing effect is good.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
in a first aspect, an embodiment of the present invention provides a dual-fluid jet grouting drilling tool, including a driving connecting shaft and a housing, the dual-fluid jet grouting drilling tool further including: the device comprises a first injection pipe, a second injection pipe, a hollow inner drill rod, a hollow outer drill rod, an inner drill bit, an outer drill bit and a double-liquid rotary spraying device with a vertical nozzle, a horizontal nozzle, a third nozzle and a sealing element; wherein the content of the first and second substances,
one end of the driving connecting shaft is connected with an external driving device, and the other end of the driving connecting shaft is coaxially and fixedly connected with the hollow inner drill rod and the hollow outer drill rod and penetrates through the shell;
the first injection pipe is positioned on the periphery of the upper part of the shell and communicated with the inner cavity of the hollow inner drill rod; the second injection pipe is positioned on the periphery of the lower part of the shell and communicated with an annular gap between the hollow outer drill rod and the hollow inner drill rod;
the hollow inner drill rod is fixedly connected with the inner drill bit, and the hollow outer drill rod is fixedly connected with the outer drill bit;
the vertical nozzle and the horizontal nozzle of the double-liquid rotary spraying device are communicated with the inner cavity of the hollow inner drill rod at the central point of the double-liquid rotary spraying device, and the third nozzle is communicated with the annular gap; the vertical nozzles extend to the bottom of the inner drill bit along the direction of the inner drill bit, the horizontal nozzles are perpendicular to the vertical nozzles and are uniformly distributed on the periphery of the outer drill bit, and the third nozzles are positioned on the upper side, the lower side or the periphery of the horizontal nozzles; the seal seals against the vertical nozzle when fluid within the inner drill rod is sprayed through the horizontal nozzle.
As a preferred embodiment of the present invention, the number of the first injection pipes is at least two, and the first injection pipes are uniformly distributed on the outer circumference of the upper portion of the housing; the number of the second injection pipes is at least two, and the second injection pipes are uniformly distributed on the periphery of the lower portion of the shell.
As a preferred embodiment of the present invention, the first injection pipe injects high pressure water, and the second injection pipe injects high pressure cement slurry.
As a preferred embodiment of the present invention, the housing has a first annular groove at a position communicating with the first water injection pipe; the shell is provided with a second annular groove at the position communicated with the second injection pipe.
In a preferred embodiment of the present invention, the horizontal nozzles have at least two nozzles uniformly distributed on the upper periphery of the outer drill.
As a preferred embodiment of the invention, the sealing element is spherical, and the diameter of the sealing element is 1-3 mm larger than that of the vertical nozzle.
In a preferred embodiment of the present invention, the two end faces of the fixed connection are respectively provided with opposite saw-tooth-shaped slots, and the detachable fixed connection is realized by a saw-tooth engagement manner.
In a second aspect, the invention also provides a double-fluid rotary jetting grouting reinforcement method, wherein a first high-pressure fluid is conveyed through the inner cavity of the inner drill rod, and a second high-pressure fluid is conveyed through the annular gap between the inner drill rod and the outer drill rod; during drilling operation, a first fluid is sprayed through a vertical nozzle arranged at the bottom of an inner drill bit and communicated with an inner cavity of an inner drill rod to complete drilling; during rotary spraying operation, the vertical nozzle is sealed, first high-pressure fluid and second high-pressure fluid are sprayed through a horizontal nozzle and a third nozzle which are arranged on the outer side of the outer drill bit, and the third nozzle for spraying the second high-pressure fluid is arranged on the upper side, the lower side or the periphery of the horizontal nozzle; under the impact of the first high-pressure fluid, the second high-pressure fluid rapidly permeates into the hole wall, and meanwhile, the first high-pressure fluid and the second high-pressure fluid are mixed to jointly complete grouting reinforcement of the drilled hole.
In a preferred embodiment of the present invention, the first high-pressure fluid is high-pressure water, and the second high-pressure fluid is high-pressure cement slurry.
As a preferred embodiment of the invention, the double-liquid rotary jet grouting reinforcement method comprises the following steps:
step S1, connecting a high-pressure water injection pipe with high-pressure water, and connecting a high-pressure cement slurry injection pipe with high-pressure cement slurry;
step S2, high-pressure water enters the inner cavity of the hollow inner drill rod through the water injection pipe, and high-pressure cement slurry enters the annular columnar gap between the hollow inner drill rod and the hollow outer drill rod through the cement slurry injection pipe;
step S3, when the double-fluid rotary jet drilling tool is in a drilling state, the high-pressure water vertical nozzle of the double-fluid rotary jet device is opened, and high-pressure water flows through the double-fluid rotary jet device from the inner cavity of the inner drill rod to enter the inner drill bit so as to provide high-pressure water for drilling operation;
step S4, completing the drilling operation, and when performing the rotary spraying operation, sealing the high-pressure water vertical nozzle by a sealing element, sealing the high-pressure water vertical nozzle, opening the horizontal nozzle, and spraying the high-pressure water from the horizontal nozzle of the double-liquid rotary spraying device through the inner cavity of the inner drill rod;
step S5, rotating and spraying high-pressure water on the inner wall of the drill hole along with the rotation of the drill rod; and the cement slurry nozzles distributed on two sides or around the horizontal nozzle simultaneously spray high-pressure cement slurry, and the cement slurry seeps into the inner wall of the drilled hole in a high-pressure state and is mixed with high-pressure water to complete filling and reinforcing of the drilled hole. .
In summary, the biliquid rotary jetting drilling tool and the biliquid rotary jetting grouting reinforcement method of the embodiment of the invention transmit the power of the drill bit and transmit high-pressure water and high-pressure cement paste at the same time, and the biliquid transmission mode of the inner and outer hollow drill rods realizes ultrahigh pressure transmission, can finish the reinforcement of the drill hole in different directions, and cannot be limited to the vertical direction; the inner hollow drill rod and the outer hollow drill rod can be disassembled and assembled at once, so that the maintenance and the carrying are convenient; the cutting of high-pressure water and the infiltration of high-pressure cement slurry are carried out simultaneously, and the reinforcing effect is good.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of a dual-fluid jet grouting drilling tool according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view taken along line A-A' of FIG. 1;
FIG. 3 is a schematic cross-sectional view of B-B' in FIG. 1;
FIG. 4 is an enlarged view of a first exemplary structure shown in FIG. 1 at area C;
FIG. 5 is an enlarged view of a second exemplary structure shown in FIG. 1 at area C;
fig. 6 is a schematic flow chart of a double-fluid jet grouting reinforcement method according to an embodiment of the present invention.
Description of reference numerals:
1. a drive connection shaft; 2. a housing; 3. a first injection pipe; 31. a groove; 4. a second injection pipe; 41. a groove; 5. a hollow inner drill rod; 6. a hollow outer drill rod; 61. an annular gap; 71. an inner drill bit; 72. an outer drill bit; 8. a double-liquid rotary spraying device; 81. a vertical spout; 82. a horizontal spout; 83. a third nozzle; 84. and a seal.
Detailed Description
The technical problems, aspects and advantages of the invention will be explained in detail below with reference to exemplary embodiments. The following exemplary embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The embodiment of the invention provides a biliquid rotary jetting drilling tool and a biliquid rotary jetting grouting reinforcement method. The drilling rod carries water in the cavity, and the grout is carried in the clearance of drilling rod and outer drilling rod in the cavity, when appearing blockking up, directly with the outer drilling rod of cavity dismantle the clearance can, need not change the part. The reinforcement of the drill hole can be completed in different directions and can not be limited to the vertical direction; the cutting of high-pressure water and the osmosis of high-pressure cement slurry are carried out simultaneously, so that a good reinforcing effect is ensured.
The present invention will be described in further detail below with reference to specific embodiments and drawings.
First embodiment
The embodiment provides a double-liquid rotary jet drilling tool. Fig. 1 is a schematic structural diagram of the double-fluid jet grouting drilling tool. As shown in fig. 1, the double-fluid jet rotary drilling tool includes: the device comprises a driving connecting shaft 1, a shell 2, a first injection pipe 3, a second injection pipe 4, a hollow inner drill rod 5, a hollow outer drill rod 6, an inner drill bit 71, an outer drill bit 72 and a double-liquid rotary spraying device 8 with a vertical nozzle 81, a horizontal nozzle 82, a third nozzle 83 and a sealing member 84. One end of the driving connecting shaft 1 is used for connecting an external driving device; the other end is fixedly connected with the hollow inner drill rod 5 and the hollow outer drill rod 6 and penetrates through the shell 2. The number of the first injection pipes 3 is at least two, the first injection pipes are uniformly distributed on the circumference of the upper part of the shell 2 and are communicated with the inner cavity of the hollow inner drill rod 5; the hollow inner drill rod 5 is fixedly connected with the driving connecting shaft 1 coaxially, extends to the first injection pipe 3 positioned at the upper end of the shell 2 and is communicated with the first injection pipe; the number of the second injection pipes 4 is at least two, the second injection pipes are uniformly distributed on the circumference of the lower part of the shell 2 and are communicated with an annular gap 61 between the hollow outer drill rod 6 and the hollow inner drill rod 5; the hollow outer drill rod 6 is sleeved outside the hollow inner drill rod 5 and is coaxially and fixedly connected with the driving connecting shaft 1 and the hollow inner drill rod 5.
In the above-described embodiment, the first injection pipe 3 injects high-pressure water, and the second injection pipe 4 injects high-pressure cement slurry; alternatively, the first injection pipe 3 is injected with cement paste, and the second injection pipe 4 is injected with water glass. In practical application, the liquid injected into the first injection pipe and the second injection pipe is determined according to actual requirements. In the following description, the present embodiment will be described by taking the example in which the first injection pipe 3 injects high-pressure water and the second injection pipe 4 injects high-pressure cement slurry. The following description applies equally to the case where other fluids are used.
The high pressure in the embodiment is higher than the normal water pressure, and preferably, the pressure of the high-pressure water or the high-pressure cement slurry in the embodiment is 10-40 MPa.
FIG. 2 is a schematic structural view of the section A-A' in FIG. 1; FIG. 3 is a schematic structural view of a section B-B' shown in FIG. 1. As shown in fig. 2, the housing 2 has a first annular groove 31 at a position communicating with the high-pressure water injection pipe 3. Before high-pressure water is injected into the inner cavity of the hollow inner drill rod 5 from the water injection pipe 3, a water ring is formed at the first annular groove 31 of the shell 2, and the high-pressure water is injected into the inner cavity of the inner drill rod from the water ring through the shell 2 and the first through hole of the inner drill rod 5. Preferably, the high pressure water injection pipes 3 are eight in number and are uniformly distributed on the outer circumference of the upper portion of the casing 2. As shown in fig. 3, the housing 2 has a second annular groove 41 at a position communicating with the high pressure slurry injection pipe 4. Before the high-pressure cement slurry is injected into the annular gap 61 from the injection pipe 4, a cement slurry ring is formed at the second annular groove 41 of the shell 2, and the high-pressure cement slurry ring is injected into the annular gap through the second through holes of the shell 2 and the outer drill rod 6. Preferably, the high-pressure cement slurry injection pipes 4 are eight in number and are uniformly distributed on the outer circumference of the lower portion of the casing 2. The water injection pipe, the cement paste injection pipe and the through holes are uniformly distributed in the drilling tool, and the stability of the drilling tool is ensured under a high-pressure operation state. Meanwhile, the inner and outer drill rods are used as double-liquid conveying channels, so that the laying of a conveying pipeline is omitted, the coaxiality of the inner and outer drill rods is equivalent to that of the double-liquid conveying pipeline, and the inner pressure and the outer pressure can be influenced mutually, so that the ultrahigh pressure conveying is realized. In this embodiment, the pressure of the high-pressure water or high-pressure cement slurry to be delivered can reach 40 MPa.
The drill bit consists of an outer drill bit 72 and an inner drill bit 71, wherein the outer drill bit 72 is fixedly connected with the hollow outer drill rod 5, and the inner drill bit 71 is fixedly connected with the hollow inner drill rod 5.
The fixed connection in this embodiment is detachable connection. For example, the connecting ends of the outer drill bit and the hollow outer drill bit are respectively provided with opposite sawtooth-shaped clamping grooves, and the detachable fixed connection is realized in a sawtooth meshing mode.
In the above embodiment, the double-fluid rotary spraying device 8 is located at the upper part of the drill bit, the central axis of the vertical drilling tool penetrates through the upper parts of the inner drill bit 71 and the outer drill bit 72, the high-pressure water nozzle comprises a vertical nozzle 81 and a horizontal nozzle 82, the vertical nozzle 81 is located at the bottom of the inner drill bit 71, and the diameter of the vertical nozzle is 8-10 times that of the horizontal nozzle; the number of the horizontal nozzles 82 is at least two, and the horizontal nozzles are perpendicular to the vertical nozzles 81 and are uniformly distributed on the periphery of the side surface of the outer drill bit 72; the third nozzles 83 are high-pressure cement slurry nozzles, and the high-pressure cement slurry nozzles 83 are located on the upper and lower sides or the periphery of the horizontal nozzle 82 and are uniformly distributed on the periphery of the side surface of the outer drill bit 72. When drilling is carried out, the double-liquid rotary spraying device 8 is communicated with the inner cavity of the hollow inner drill rod 5 and the inner cavity of the inner drill bit 71, and high-pressure water is sprayed out from the vertical nozzle 81; when the rotary spraying operation is carried out, the double-liquid rotary spraying device 8 enables the inner cavity of the hollow inner drill rod 5 to be communicated with the horizontal high-pressure water nozzle 82, seals the vertical nozzle 81 and enables the annular gap 51 to be communicated with the high-pressure cement nozzle 83.
The dual-fluid rotary spraying device 8 is further provided with a sealing member 84, and when the drilling operation is completed and the rotary spraying operation state is adjusted, the sealing member 84 seals the vertical nozzle 81. The sealing element 84 is spherical, the diameter of the sealing element is slightly larger than the inner diameter of a channel of the vertical nozzle 81 in the inner drill bit 71, preferably, the diameter of the spherical sealing element is 1-3 mm larger than that of the vertical nozzle, so that the sealing element can play a role in sealing, and when the drilling tool works in other directions, the sealing element 84 can be firmly plugged in the inner drill bit 71 and cannot fall back into the inner cavity of the inner drill rod 5 under the action of self gravity. Preferably, the seal 84 is made of a rubber material.
Fig. 4 is an enlarged view showing a first structure example in the region C of fig. 1. As shown in fig. 4, the third nozzle holes 83 are located at the upper and lower sides of the horizontal nozzle hole 82, and the horizontal nozzle hole 82 and the third nozzle hole 83 are uniformly distributed on the outer circumference of the outer drill 72. Fig. 5 is an enlarged view showing a second exemplary structure in the region C of fig. 1. As shown in fig. 5, the surface of the outer drill 72 has at least two rectangular grooves, a horizontal nozzle 82 and a third nozzle 83 are disposed in the rectangular grooves, the third nozzle is annular, the horizontal nozzle 82 is located at the center of the annular third nozzle 83, and the rectangular grooves, the horizontal nozzle and the third nozzle are uniformly distributed on the periphery of the outer drill 72.
The rectangular groove, the horizontal nozzles and the third nozzles are uniformly distributed, so that the stability of the drilling tool is ensured under a high-pressure operation state.
According to the double-liquid rotary spraying device disclosed by the embodiment of the invention, the inner drill rod and the outer drill rod are arranged into a hollow sleeve type, so that ultrahigh pressure conveying can be realized, and the pressure reaches 40 MPa; the inner hollow drill rod and the outer hollow drill rod can be freely disassembled, so that the equipment is convenient to disassemble, assemble, maintain, repair and transport; through the sealing of the vertical nozzle, such as the adoption of a rubber ball shape, on one hand, the sealing element is in close elastic contact with the vertical nozzle, on the other hand, the pressure of high-pressure water further compresses the sealing element, the sealing effect is improved, the drilling direction of the drilling tool can be changed at will, and the sealing element cannot fall off due to gravity; the high-pressure cement slurry is sprayed to penetrate into the inner wall of the drill hole and is quickly adhered to the inner wall of the drill hole under the guide effect of high-pressure water, so that the drill hole is filled and reinforced.
Second embodiment
The embodiment provides a double-liquid rotary jet grouting reinforcement method, which is realized based on the double-liquid rotary jet drilling tool of the first embodiment. The double-fluid rotary spraying grouting reinforcement method comprises the steps of conveying a first fluid through an inner cavity of an inner drill rod, conveying a second fluid through an annular gap between the inner drill rod and an outer drill rod, simultaneously spraying the first fluid and the second fluid through a horizontal nozzle and a third nozzle which are arranged on the outer side of a drill bit, and arranging the third nozzle for spraying the second fluid on the upper side and the lower side of or around the horizontal nozzle. Under the impact of the first fluid, the second fluid rapidly permeates into the hole wall, and meanwhile, the first fluid and the second fluid are mixed to jointly complete grouting reinforcement of the drilled hole.
The dual-fluid rotary grouting reinforcement method of the present embodiment will be further described in detail by taking the first fluid as high-pressure water and the second fluid as high-pressure cement slurry as an example. Fig. 6 is a schematic flow chart of the dual-fluid jet grouting reinforcement method. As shown in fig. 6, the method includes the steps of:
step S1, connecting a high-pressure water injection pipe with high-pressure water, and connecting a high-pressure cement slurry injection pipe with high-pressure cement slurry;
step S2, high-pressure water enters the inner cavity of the hollow inner drill rod through the water injection pipe, and high-pressure cement slurry enters the annular columnar gap between the hollow inner drill rod and the hollow outer drill rod through the cement slurry injection pipe;
step S3, when the double-fluid rotary jet drilling tool is in a drilling state, the high-pressure water vertical nozzle of the double-fluid rotary jet device is opened, and high-pressure water flows through the double-fluid rotary jet device from the inner cavity of the inner drill rod to enter the inner drill bit so as to provide high-pressure water for drilling operation;
step S4, completing the drilling operation, and when the rotary spraying operation is needed, sealing the high-pressure water vertical nozzle by using a sealing element, sealing the high-pressure water vertical nozzle, opening the horizontal nozzle, and spraying the high-pressure water from the horizontal nozzle through the double-liquid rotary spraying device from the inner cavity of the inner drill rod;
step S5, rotating and spraying high-pressure water on the inner wall of the drill hole along with the rotation of the drill rod; the cement slurry nozzles distributed on two sides or around the horizontal nozzle simultaneously spray high-pressure cement slurry, the cement slurry seeps into the inner wall of the drilled hole in a high-pressure state, is quickly adhered to the inner wall of the drilled hole by virtue of the flow guiding effect of high-pressure water, and is mixed with the high-pressure water to complete filling and reinforcing of the drilled hole.
The method for reinforcing by double-fluid jet grouting in this embodiment corresponds to the method for reinforcing by double-fluid jet grouting drilling tool in the first embodiment, and the above description of the double-fluid jet grouting drilling tool is also applicable to the method for reinforcing by double-fluid jet grouting in this embodiment, and will not be described herein again.
The present invention has been described in detail with reference to the embodiments, but the description is only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The scope of the invention is defined by the claims. The technical solutions of the present invention or those skilled in the art, based on the teaching of the technical solutions of the present invention, should be considered to be within the scope of the present invention, and all equivalent changes and modifications made within the scope of the present invention or equivalent technical solutions designed to achieve the above technical effects are also within the scope of the present invention. It should be noted that for the sake of clarity, parts of the description of the invention have been omitted where there is no direct explicit connection with the scope of protection of the invention, but where components and processes are known to those skilled in the art.
Claims (10)
1. The utility model provides a biliquid jet grouting drilling tool, includes drive connecting axle, shell, its characterized in that biliquid jet grouting drilling tool still includes: the device comprises a first injection pipe, a second injection pipe, a hollow inner drill rod, a hollow outer drill rod, an inner drill bit, an outer drill bit and a double-liquid rotary spraying device with a vertical nozzle, a horizontal nozzle, a third nozzle and a sealing element; wherein the content of the first and second substances,
one end of the driving connecting shaft is connected with an external driving device, and the other end of the driving connecting shaft is coaxially and fixedly connected with the hollow inner drill rod and the hollow outer drill rod and penetrates through the shell;
the first injection pipe is positioned on the periphery of the upper part of the shell and communicated with the inner cavity of the hollow inner drill rod; the second injection pipe is positioned on the periphery of the lower part of the shell and communicated with an annular gap between the hollow outer drill rod and the hollow inner drill rod;
the hollow inner drill rod is fixedly connected with the inner drill bit, and the hollow outer drill rod is fixedly connected with the outer drill bit;
the vertical nozzle and the horizontal nozzle of the double-liquid rotary spraying device are communicated with the inner cavity of the hollow inner drill rod at the central point of the double-liquid rotary spraying device, and the third nozzle is communicated with the annular gap; the vertical nozzles extend to the bottom of the inner drill bit along the direction of the inner drill bit, the horizontal nozzles are perpendicular to the vertical nozzles and are uniformly distributed on the periphery of the outer drill bit, and the third nozzles are positioned on the upper side, the lower side or the periphery of the horizontal nozzles; the seal seals against the vertical nozzle when fluid within the inner drill rod is sprayed through the horizontal nozzle.
2. The dual fluid jet rotary drilling tool as claimed in claim 1, wherein the number of the first injection pipes is at least two and is uniformly distributed on the outer circumference of the upper portion of the casing; the number of the second injection pipes is at least two, and the second injection pipes are uniformly distributed on the periphery of the lower portion of the shell.
3. The dual fluid jet rotary drilling tool of claim 1, wherein the first injection pipe injects high pressure water and the second injection pipe injects high pressure cement slurry.
4. The dual fluid jet rotary drilling tool as claimed in claim 1, wherein the casing has a first annular groove at a position where it communicates with the first water injection pipe; the shell is provided with a second annular groove at the position communicated with the second injection pipe.
5. The dual fluid jet rotary drilling tool as claimed in claim 1, wherein the horizontal nozzles are at least two and uniformly distributed on the upper periphery of the outer drill bit.
6. The dual fluid jet rotary drilling tool of claim 1, wherein the seal is spherical and has a diameter 1-3 mm greater than a diameter of the vertical jet.
7. The double-fluid rotary jetting drilling tool as claimed in any one of claims 1 to 6, wherein the fixed connection is formed by arranging opposite sawtooth-shaped clamping grooves on two end faces of the connection respectively, and the detachable fixed connection is realized by means of sawtooth engagement.
8. A double-liquid rotary jet grouting reinforcement method is characterized in that a first high-pressure fluid is conveyed through an inner cavity of an inner drill rod, and a second high-pressure fluid is conveyed through an annular gap between the inner drill rod and an outer drill rod; during drilling operation, a first fluid is sprayed through a vertical nozzle arranged at the bottom of an inner drill bit and communicated with an inner cavity of an inner drill rod to complete drilling; during rotary spraying operation, the vertical nozzle is sealed, first high-pressure fluid and second high-pressure fluid are sprayed through a horizontal nozzle and a third nozzle which are arranged on the outer side of the outer drill bit, and the third nozzle for spraying the second high-pressure fluid is arranged on the upper side, the lower side or the periphery of the horizontal nozzle; under the impact of the first high-pressure fluid, the second high-pressure fluid rapidly permeates into the hole wall, and meanwhile, the first high-pressure fluid and the second high-pressure fluid are mixed to jointly complete grouting reinforcement of the drilled hole.
9. The dual hydro-rotary grouting reinforcement method of claim 8, wherein the first high pressure fluid is high pressure water and the second high pressure fluid is high pressure cement slurry.
10. The dual-fluid rotary grouting reinforcement method according to claim 9, characterized in that the dual-fluid rotary grouting reinforcement method comprises the following steps:
step S1, connecting a high-pressure water injection pipe with high-pressure water, and connecting a high-pressure cement slurry injection pipe with high-pressure cement slurry;
step S2, high-pressure water enters the inner cavity of the hollow inner drill rod through the water injection pipe, and high-pressure cement slurry enters the annular columnar gap between the hollow inner drill rod and the hollow outer drill rod through the cement slurry injection pipe;
step S3, when the double-fluid rotary jet drilling tool is in a drilling state, the high-pressure water vertical nozzle of the double-fluid rotary jet device is opened, and high-pressure water flows through the double-fluid rotary jet device from the inner cavity of the inner drill rod to enter the inner drill bit so as to provide high-pressure water for drilling operation;
step S4, completing the drilling operation, and when performing the rotary spraying operation, sealing the high-pressure water vertical nozzle by a sealing element, sealing the high-pressure water vertical nozzle, opening the horizontal nozzle, and spraying the high-pressure water from the horizontal nozzle of the double-liquid rotary spraying device through the inner cavity of the inner drill rod;
step S5, rotating and spraying high-pressure water on the inner wall of the drill hole along with the rotation of the drill rod; and the cement slurry nozzles distributed on two sides or around the horizontal nozzle simultaneously spray high-pressure cement slurry, and the cement slurry seeps into the inner wall of the drilled hole in a high-pressure state and is mixed with high-pressure water to complete filling and reinforcing of the drilled hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010695678.1A CN111810079A (en) | 2020-07-17 | 2020-07-17 | Double-liquid rotary jet drilling tool and double-liquid rotary jet grouting reinforcement method |
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| CN202010695678.1A CN111810079A (en) | 2020-07-17 | 2020-07-17 | Double-liquid rotary jet drilling tool and double-liquid rotary jet grouting reinforcement method |
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| CN111810079A true CN111810079A (en) | 2020-10-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116752934A (en) * | 2023-08-21 | 2023-09-15 | 中煤科工集团沈阳研究院有限公司 | Drilling inner wall spraying hole protection technology |
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