CN114960632A - Horizontal drilling rotary jet grouting pile forming device and construction method thereof - Google Patents
Horizontal drilling rotary jet grouting pile forming device and construction method thereof Download PDFInfo
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- CN114960632A CN114960632A CN202210670837.1A CN202210670837A CN114960632A CN 114960632 A CN114960632 A CN 114960632A CN 202210670837 A CN202210670837 A CN 202210670837A CN 114960632 A CN114960632 A CN 114960632A
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- 238000005553 drilling Methods 0.000 title claims abstract description 102
- 238000010276 construction Methods 0.000 title claims abstract description 37
- 230000007246 mechanism Effects 0.000 claims abstract description 74
- 239000002002 slurry Substances 0.000 claims abstract description 26
- 238000005507 spraying Methods 0.000 claims description 19
- 238000002347 injection Methods 0.000 claims description 18
- 239000007924 injection Substances 0.000 claims description 18
- 238000009527 percussion Methods 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 24
- 230000008569 process Effects 0.000 abstract description 20
- 239000011440 grout Substances 0.000 description 22
- 239000002689 soil Substances 0.000 description 10
- 239000004568 cement Substances 0.000 description 8
- 230000003014 reinforcing effect Effects 0.000 description 8
- 239000011435 rock Substances 0.000 description 8
- 238000007569 slipcasting Methods 0.000 description 7
- 230000005641 tunneling Effects 0.000 description 6
- 230000002411 adverse Effects 0.000 description 4
- 238000007596 consolidation process Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000000670 limiting effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004035 construction material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
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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
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
-
- 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
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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
- 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
-
- 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
- E21B6/00—Drives for drilling with combined rotary and percussive action
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Structural Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
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- Earth Drilling (AREA)
Abstract
The invention relates to the field of geotechnical engineering construction, and discloses a horizontal drilling rotary jet grouting pile forming device which comprises a travelling mechanism, an azimuth angle adjusting mechanism, a height and elevation angle adjusting mechanism and a rotary jet grouting mechanism, wherein the rotary jet grouting mechanism comprises a carriage, a front power head, a wall protection sleeve pipe, a rear power head, a drill rod and a drill bit, the carriage is connected with the front power head and the rear power head in a sliding manner, the front power head is detachably connected with the wall protection sleeve pipe and is used for driving the wall protection sleeve pipe to move in the front-rear direction, the rear power head is detachably connected with one end of the drill rod and is used for driving the drill rod to rotate and move in the front-rear direction, the drill rod and the wall protection sleeve pipe are coaxially arranged, and the other end of the drill rod is detachably connected with a drilling drill bit or a grouting drill bit. The invention can effectively prevent the collapse of the drilled hole, reduce the slurry abandoning amount in the construction process, and has stable pile forming quality and pile diameter meeting the design requirement.
Description
Technical Field
The invention relates to the field of geotechnical engineering construction, in particular to a horizontal drilling rotary jet grouting pile-forming device and a construction method thereof.
Background
In the underground tunneling project, adverse geological conditions such as mud outburst and water gushing, sand gushing, silt, broken rock stratum and the like are often encountered, and the adverse geological conditions bring great difficulty to tunneling construction and simultaneously bring great potential safety hazards to safety production work.
In the process of underground tunneling under the adverse geological conditions, advanced small conduits, pipe shed supporting or advanced consolidation grouting and other modes are generally adopted, but certain construction limitations exist in the mode adopted by part of adverse geological sections, and the safe tunneling process cannot be guaranteed. For example, when a pipe shed advance support silt layer is adopted, a certain gap exists between a steel pipe and the steel pipe, so that a small advance guide pipe is often adopted in an auxiliary mode to fill cement grout for consolidation, but the geological rock mass is relatively dense, and the cement grout is difficult to permeate and uniformly diffuse, so that even if the pipe shed support is adopted to support part of rock soil, the possibility of collapse still exists. Particularly, if advanced consolidation grouting or advanced curtain grouting is directly adopted for surrounding rocks of a water-containing fine sand layer, the grout is difficult to diffuse by adopting a pure pressure type grouting method under the condition that the surrounding rocks are relatively dense, and even if partial diffusion exists, the cement grout can also exist in the form of grout veins or grout bags, so that the effect of supporting the soil body is not obvious, and the phenomenon of collapse is easy to occur.
Practice proves that the construction method of replacing a small advanced conduit, a pipe shed support or advanced consolidation grouting by the horizontal jet grouting pile can obviously make up for the defects of the process in the unfavorable geological tunneling process. The construction process of the existing horizontal jet grouting pile generally comprises the following steps: drilling according to the depth and the angle required by design in advance, withdrawing a drilling drill rod after hole forming, replacing a rotary spraying drill rod to carry out a rotary spraying grouting process, or matching a hole leading drilling machine, and allowing the rotary spraying drilling machine to operate after the hole leading drilling machine completes the drilling. After the rotary spraying drill rod extends into the bottom of the hole, part of the rotary spraying drill rod end is provided with an orifice closing device, and the orifice closing device can achieve the effects of reducing the slurry return amount and abandoning the slurry collection and centralized treatment. However, the following disadvantages of this process still exist: because the district that deals with is unfavorable geology section, the hole collapses in the drilling after the pore-forming extremely easily, after the drilling rod back-out hole of drilling, change after the whirl drilling rod, downthehole hole still can collapse, the drilling rod and pore wall clearance can be filled up to grit, make the mixing space of grout and grit reduce, produce high pressure state in the drilling, at this moment, grout can backward flow to drill way pressure release, if do not have the pressure release mouth, will lead to the slip casting pipe to burst, the slip casting machine overload shuts down or the ground warp scheduling problem. The small mixing space of cement slurry in the drill hole finally causes poor pile forming effect, which generally shows that the pile diameter is small, the cement slurry is not uniformly mixed, the slurry is more discarded and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a horizontal drilling rotary jet grouting pile-forming device and a construction method thereof.
In order to achieve the above object, one aspect of the present invention provides a horizontal drilling rotary jet grouting pile-forming device, including:
the traveling mechanism is used for adjusting the position of the rotary spraying grouting mechanism;
the azimuth angle adjusting mechanism is used for adjusting the azimuth angle of the rotary jet grouting mechanism;
the height elevation angle adjusting mechanism is used for adjusting the height and the elevation angle of the rotary jet grouting mechanism;
jet grouting mechanism includes balladeur train, preceding unit head, dado sleeve pipe, back unit head, drilling rod and drill bit, sliding connection has on the balladeur train preceding unit head and back unit head, preceding unit head can be dismantled and be connected with the dado sleeve pipe, preceding unit head is used for driving the dado sleeve pipe and removes along the fore-and-aft direction, the one end that is connected with the drilling rod can be dismantled to back unit head, back unit head is used for driving the drilling rod rotation and removes along the fore-and-aft direction, the drilling rod sets up with the dado sleeve pipe axle center, just the external diameter of drilling rod is less than dado sheathed tube inner wall diameter, the other end of drilling rod can be dismantled and be connected with the drill bit, the drill bit is including creeping into drill bit and slip casting drill bit.
Furthermore, the drilling bit comprises an impactor and an impact bit, the other end of the drill rod, the impactor and the impact bit are sequentially detachably connected during drilling, and the impactor penetrates through the wall protection sleeve;
during grouting, the other end of the drill rod is detachably connected with the grouting drill bit, and the grouting drill bit penetrates through the retaining wall sleeve.
Further, a gas injection channel and a grouting channel are arranged in the drill rod, the gas injection channel is selectively communicated with the impactor during drilling, and the gas injection channel and the grouting channel are selectively communicated with the grouting drill bit during grouting.
Further, the slip casting drill bit includes:
the gas inlet channel is selectively communicated with the gas injection channel;
the air outlet is arranged along the radial direction of the grouting drill bit and communicated with the air inlet channel;
the slurry inlet channel is selectively communicated with the grouting channel;
and the slurry outlet hole is arranged along the radial direction of the grouting drill bit and communicated with the slurry inlet channel.
Furthermore, the rotary spraying grouting mechanism further comprises a pipe shoe, the pipe shoe is of a hollow annular structure, the outer wall of the pipe shoe is in a step shape, the small-diameter end of the pipe shoe is detachably connected with one end, far away from the front power head, of the wall protecting sleeve, the diameter of the inner wall of the pipe shoe is smaller than that of the inner wall of the drill rod, and the diameter of the inner wall of the pipe shoe is larger than or equal to that of the outer wall of the impactor;
the outer wall of the middle of the grouting drill bit is provided with an annular bulge, the diameter of the inner wall of the annular bulge is smaller than or equal to that of the inner wall of the retaining wall sleeve, and the diameter of the outer wall of the annular bulge is larger than that of the inner wall of the pipe boot.
Further, the travelling mechanism is a crawler travelling mechanism;
the azimuth angle adjusting mechanism comprises a support, a support bracket, a first power telescopic part, a rotating rod, a first gear and a first rack, wherein the support is fixedly arranged above the crawler traveling mechanism, the support bracket is fixedly arranged on the upper surface of the support and is in an inverted omega shape, the rotating rod is rotatably connected in the support bracket, the first gear is coaxially and fixedly connected on the outer side wall of the rotating rod, the fixed end of the first power telescopic part is fixedly connected on the upper surface of the support, the movable end of the first power telescopic part is fixedly connected with the first rack, the first rack is slidably connected with the upper surface of the support, and the first rack is meshed with the first gear;
the height elevation angle adjusting mechanism comprises a second power telescopic piece and a third power telescopic piece, the lower end of the second power telescopic piece is hinged with the side wall of the rear end of the rotating rod, and the upper end of the second power telescopic rod is hinged with the front end of the sliding frame; the lower end of the third power telescopic piece is hinged to the side wall of the front end of the rotating rod, and the upper end of the third power telescopic rod is hinged to the rear end of the sliding frame.
Furthermore, the front power head and the rear power head are detachably connected through a fastener.
Compared with the prior art, the invention at least has the following advantages:
the horizontal drilling rotary jet grouting pile-forming device is provided with the wall protection sleeve, so that the phenomenon of borehole collapse when the drill rod and the drilling bit are withdrawn from the borehole is avoided; the grouting drill bit passes through the wall protection sleeve, so that the situation that the grouting drill bit passes through a collapsed hole is avoided, the situations of drill holding and drill clamping of the grouting drill bit cannot occur, and the service life of the grouting drill bit is prolonged; in the construction process, the drill rod is not required to be disassembled and assembled, and only the drill bit is required to be replaced, so that the engineering construction speed can be quickly improved; the arrangement of the wall protection sleeve can also reduce the phenomenon of slurry waste caused by pressure relief of slurry from the orifice in the traditional construction process, reduce the slurry discarding amount in the construction process and reduce the construction material cost; the pile forming device by horizontal drilling, rotary jetting and grouting has stable pile forming quality, and the pile diameter meets the design requirement.
The invention also provides a construction method of the horizontal drilling rotary jet grouting pile-forming device based on the right, which comprises the following steps:
s1, paying off, and marking drilling point positions;
s2, installing the wall protection sleeve and the drill rod, installing the wall protection sleeve on the front power head, and installing the drill rod on the rear power head;
s3, positioning, namely controlling the travelling mechanism to adjust the position of the rotary jet grouting mechanism; controlling the azimuth angle adjusting mechanism to adjust the azimuth angle of the rotary jet grouting mechanism; controlling the height elevation angle adjusting mechanism to adjust the height and elevation angle of the rotary spraying grouting mechanism;
s4, installing the drilling bit at the other end of the drill rod, sliding the front power head and the rear power head to the rear end of the sliding frame, sleeving the drill rod in the wall protection sleeve, and arranging the drilling bit through the wall protection sleeve to enable the drill rod to be arranged towards the direction of the drilling point;
s5, drilling to form a hole, controlling the front power head and the rear power head to move towards the front end of the sliding frame at the same time, driving the protective wall sleeve to drill a hole in the structural layer by the drilling bit, and stopping drilling until the designed hole depth is reached;
s6, replacing the grouting drill bit, controlling the rear power head to slide to the rear end of the sliding frame, replacing the drill bit with the grouting drill bit, and controlling the rear power head to slide to the front end of the sliding frame, so that the grouting drill bit penetrates through the retaining wall sleeve;
s7, performing rotary jetting and retreating, injecting air and slurry into the drill hole through the drill rod and the grouting drill bit, and controlling the front power head and the rear power head to enable the wall protection sleeve and the grouting drill bit to withdraw from the drill hole;
s8, plugging the drilling hole;
and repeating the steps S3 to S8 until the construction is finished.
Further, the step S5 includes inputting air into the drill bit through the drill rod;
in step S7, the front power head and the rear power head are moved back intermittently to withdraw the retaining wall sleeve and the grouting drill from the borehole.
Further, in the steps S5 and S7, the front power head and the rear power head are connected by a fastener; in other steps, the front power head and the rear power head are not connected.
The horizontal drilling rotary jet grouting pile-forming construction method and the horizontal drilling rotary jet grouting pile-forming device have the same advantages compared with the prior art, and are not repeated herein.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described 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 without inventive exercise.
FIG. 1 is a schematic perspective view of a horizontal drilling rotary jet grouting pile-forming device (when a drilling bit is used) according to the present invention;
FIG. 2 is a schematic cross-sectional view of a horizontal drilling rotary jet grouting pile-forming device (when a drilling bit is used) according to the present invention;
FIG. 3 is a schematic illustration of the construction of the present invention in use with a drilling bit, drill pipe and retaining wall sleeve;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3 in accordance with the present invention;
FIG. 5 is an enlarged view of a portion of the area B of FIG. 4 in accordance with the present invention;
FIG. 6 is a schematic perspective view of a horizontal drilling rotary jet grouting pile-forming device (when a grouting drill bit is used) according to the present invention;
FIG. 7 is a schematic view of the construction of the present invention in use with a grouting bit, drill pipe and retaining wall sleeve;
FIG. 8 is a cross-sectional view taken along line C-C of FIG. 7 in accordance with the present invention;
FIG. 9 is an enlarged view of a portion of the invention taken in the area D of FIG. 8;
FIG. 10 is a flow chart of the construction method of the horizontal drilling rotary jet grouting pile-forming device of the invention.
Reference numerals: 1. a carriage; 2. a front power head; 3. a retaining wall bushing; 4. a rear power head; 5. a drill stem; 6. drilling a drill bit; 7. grouting a drill bit; 8. a pipe boot; 9. a crawler travel mechanism; 10. a support; 11. a support bracket; 12. a first powered telescoping member; 13. a rotating rod; 14. a first gear; 15. a first rack; 16. supporting the square pipe; 17. a reinforcing member; 18. a second powered telescoping member; 19. a third power pack; 101. a slide rail; 102. a second rack; 103. a third rack; 201. a first drive motor; 202. a second gear; 203. a second drive motor; 401. a third drive motor; 402. a third gear; 501. a gas injection channel; 502. grouting a channel; 601. an impactor; 602. a percussion drill bit; 603. a crossover sub; 701. an air intake passage; 702. an air outlet; 703. a slurry inlet channel; 704. and (6) slurry outlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1 and 6, in one aspect, the invention provides a horizontal drilling rotary jet grouting pile-forming device, which comprises a traveling mechanism, an azimuth angle adjusting mechanism, a height elevation angle adjusting mechanism and a rotary jet grouting mechanism.
The travelling mechanism adopts a crawler travelling mechanism 9, and the rotary jet grouting pile-forming device moving mechanism can drive the rotary jet grouting mechanism to move, has large landing area of the crawler, can reduce the pressure on the ground, and is convenient to travel on soft muddy or uneven ground.
With combined reference to fig. 2, the azimuth angle adjusting mechanism is used to adjust the azimuth angle of the jet grouting mechanism. Specifically, the azimuth angle adjusting mechanism includes a bracket 10, a support bracket 11, a first power expansion member 12, a rotating rod 13, a first gear 14, and a first rack 15. The bracket 10 is fixedly connected with the upper surface of the walking mechanism 9. The upper surface of the support 10 is fixedly provided with a support bracket 11, the support bracket 11 is inverted omega-shaped, a reinforcing member 17 is arranged between the middle of the support bracket 11 and the support 10, the reinforcing member 17 is inverted U-shaped, the middle bottom of the reinforcing member 17 is fixedly connected with the support 10, a support square tube 16 is arranged between the two ends of the reinforcing member 17 and the support 10, the bottommost side wall of the support square tube 16 is fixedly connected with the support 10, the topmost side wall of the support square tube 16 is connected with a reinforcing member 17, the upper surface of the reinforcing member 17 is attached to the lower surface of the support bracket 11, and the support square tube 16 and the reinforcing member 17 are arranged to ensure the stability of the support bracket 11. The middle part of the support bracket 11 is arc-shaped and is arc-shaped, that is, the central angle of the arc-shaped middle part of the support bracket 11 is larger than 180 degrees. The middle part of the support bracket 11 is rotatably connected with a rotating rod 13, and the outer side wall of the rotating rod 13 is coaxially and fixedly connected with a first gear 14. The fixed end of the first power extensible member 12 is fixedly connected to the upper surface of the support 10, the movable end of the first power extensible member 12 is fixedly connected with the first rack 15, the first rack 15 is slidably connected with the upper surface of the support 10, the first rack 15 and the rotating rod 13 are perpendicular to each other, and the first rack 15 is meshed with the first gear 14. A height elevation angle adjusting mechanism and a rotary spraying grouting mechanism are arranged above the rotating rod 13. When the rotating rod 13 is used, the movable end of the first power telescopic part 12 stretches and retracts to drive the first rack 15 to move, so that the first rack 15 is driven to rotate, the rotating rod 13 rotates to drive the height elevation angle adjusting mechanism and the rotary jetting grouting mechanism to rotate, and the azimuth angle of the rotary jetting grouting mechanism is adjusted.
Optionally, the number of the support brackets 11 is two along the axial direction of the rotating rod 13, the rotating rod 13 is circumferentially provided with a limit protrusion, the limit protrusion is annular, and the support brackets 11 are provided with limit grooves which are slidably connected with the limit protrusion. The limiting groove and the limiting protrusion are arranged, so that the displacement of the rotating rod 13 along the axis direction can be limited. The rotation rod 13 is prevented from being released from the support bracket 11.
The height elevation angle adjusting mechanism adopts a telescopic scissor fork mechanism. Specifically, the height elevation angle adjusting mechanism comprises a second power telescopic piece 18 and a third power telescopic piece 19, the second power telescopic piece 18 and the third power telescopic piece 19 form a scissor fork mechanism, the rotary jet grouting mechanism comprises a sliding frame 1, a rotary jet grouting assembly is arranged above the sliding frame 1, the lower end of the second power telescopic piece 18 is hinged with the side wall of the rear end of the rotating rod 13, and the upper end of the second power telescopic rod is hinged with the front end of the sliding frame 1; the lower end of the third power expansion piece 19 is hinged with the side wall of the front end of the rotating rod 13, and the upper end of the third power expansion piece is hinged with the rear end of the sliding frame 1. When the second power telescopic element 18 and the third power telescopic element 19 are equally long, the carriage 1 is in a horizontal state; when the length of the second power expansion piece 18 is smaller than that of the third power expansion piece 19, the carriage 1 is in an inclined state, and the device is suitable for hole distribution construction with an elevation angle. Generally, the angle of the hole arrangement is 2 to 5 degrees in elevation angle or according to the design requirement.
In the embodiment of the present invention, two second power expansion members 18 are provided, two second power expansion members 18 are arranged in parallel, and the second power expansion members 18 can simultaneously achieve the expansion function, so as to ensure the stability of the carriage 1.
It should be noted that the first power expansion element 12, the second power expansion element 18 and the third power expansion element 19 are components capable of controlling expansion and contraction, such as an electric push rod, a pneumatic push rod or a hydraulic push rod.
The rotary spraying grouting mechanism further comprises a front power head 2, a wall protection sleeve 3, a rear power head 4, a drill rod 5 and a drill bit. The lower surface of the sliding frame 1 is respectively hinged with the upper ends of a second power telescopic piece 18 and a third power telescopic piece 19, and the upper surface of the sliding frame 1 is connected with a front power head 2 and a rear power head 4 in a sliding mode. Preferably, the upper surface of the carriage 1 is provided with a slide rail 101 arranged along the front-back direction, the lower surfaces of the front power head 2 and the rear power head 4 are provided with slide grooves, the slide grooves are matched with the slide rail 101, and the front power head 2 and the rear power head 4 are connected with the slide rail 101 in a sliding manner by arranging the slide grooves. Specifically, the upper surface of the carriage 1 is fixedly connected with a second rack 102, the second rack 102 is arranged in parallel with the slide rail 101, the front power head 2 is used for driving the retaining wall sleeve 3 to move along the front-back direction, the front power head 2 comprises a first supporting frame, first driving motor 201 and second driving motor 203, first support frame is hollow structure, hollow structure sets up along the fore-and-aft direction, first driving motor 201 of fixedly connected with on the first support frame, the output shaft transmission of first driving motor 201 is connected with second gear 202, second gear 202 and the meshing of second rack 102, first driving motor 201 drives second gear 202 and rotates and can drive first support frame and remove along the fore-and-aft direction of balladeur train 1, first support frame and second driving motor 203 fixed connection, the output shaft of second driving motor 203 runs through hollow structure and sets up, the output shaft and the dado sleeve 3 of second driving motor 203 can dismantle and be connected. Optionally, an external thread is arranged at one end, close to the wall protection sleeve 3, of an output shaft of the second driving motor 203, an internal thread is arranged at one end, close to the second driving motor 203, of the wall protection sleeve 3, the output shaft of the second driving motor 203 and one end, close to the second driving motor 203, of the wall protection sleeve 3 are in threaded connection, and the output shaft of the second driving motor 203 rotates in the forward and reverse directions to achieve the process of fast dismounting and mounting of the wall protection sleeve 3. The outer diameter of the retaining wall casing 3 is adjusted according to the size of a pile, the outer diameter is usually 150mm-220mm, and the retaining wall casing 3 is used for preventing a drilled hole from collapsing and simultaneously leaving enough space for subsequent cement slurry injection. The upper surface of the carriage 1 is also fixedly connected with a third rack 103, and the third rack 103 is arranged parallel to the slide rail 101. The rear power head 4 is detachably connected with one end of a drill rod 5, the rear power head 4 is used for driving the drill rod 5 to rotate and move along the front-back direction, and the drill rod 5 and the wall protection sleeve 3 are coaxially arranged. The rear power head 4 comprises a second support frame, a third driving motor 401 and a fourth driving motor (not shown in the figure), the side wall of the second support frame is fixedly connected with the third driving motor 401, an output shaft of the third driving motor 401 is connected with a third gear 402 in a transmission manner, the third gear 402 is meshed with a third rack 103, the third driving motor 401 drives the third gear 402 to rotate so as to drive the second support frame to move along the front-back direction of the sliding frame 1, the first support frame is fixedly connected with the fourth driving motor, and an output shaft of the fourth driving motor is detachably connected with the drill rod 5. The third driving motor 401 is used for driving the drill rod 5 to move in the front-back direction, and the fourth driving motor is used for driving the drill rod 5 to rotate. The outer diameter of the drill rod 5 is smaller than the inner wall diameter of the wall protection sleeve 3, the other end of the drill rod 5 is detachably connected with a drill bit, and the drill bit comprises a drilling drill bit 6 and a grouting drill bit 7.
The sliding length of the front power head and the rear power head on the sliding frame is larger than the depth of the design hole, and a drill rod does not need to be folded and installed in the construction process. When the conventional drilling machine operates, a drill rod with the hole depth of 30m is disassembled and assembled, the time is about 60 minutes, but the device only needs to replace a drill bit, and the construction efficiency can be greatly improved.
The drilling bit 6 comprises an impactor 601 and a percussion bit 602, when drilling, the other end of the drill rod 5, the impactor 601 and the percussion bit 602 are sequentially detachably connected, the impactor 601 penetrates through the wall protection casing 3, the impactor 601 is a pneumatic impactor and can provide power for the impactor 601 through inputting high-pressure air, the impactor 601 is directly connected with the percussion bit 602 to drill into a soft soil layer in an impacting mode, and the drill drills comprehensively in a low-speed rotation non-coring mode.
When the rotary jet grouting pile is formed, the other end of the drill rod 5 is detachably connected with a grouting drill bit 7, and the grouting drill bit 7 penetrates through the retaining wall casing 3. In the grouting process, grouting slurry and air are sprayed out of the grouting drill bit 7, and the drill rod 5 and the wall protection sleeve are withdrawn from the drilled hole in an intermittent withdrawing mode.
When drilling, the other end of the drill rod 5 is connected with a drilling bit 6, the drill rod 5 and the wall protection sleeve 3 are simultaneously drilled into a drilled hole, after the designed hole depth is reached, the drill rod 5 is withdrawn from the wall protection sleeve 3, the wall protection sleeve 3 is ensured to be still remained in the drilled hole, the drilling bit 6 at the other end of the drill rod 5 is replaced by a grouting bit 7, the drill rod 5 is controlled to penetrate into the wall protection sleeve 3 again, the head end part of the grouting bit 7 is ensured to penetrate through the wall protection sleeve 3, during grouting, the drill rod 5 and the wall protection sleeve 3 are withdrawn from the drilled hole in an intermittent retreating mode, high-pressure air and grout are injected into a soil body through the drill rod 5 and the grouting bit 7, the construction pressure is more than 40MPa, the grout adopts cement grout or double-liquid cement grout, when the wall protection sleeve 3 is communicated with the drill rod 5 to retreat, a cavity can be formed in bedrock, the grout can be injected into the soil body while the soil body is collapsed on the upper part and mixed with the soil body, in the collapse process, upper rock soil can be loosened layer by layer, grout can be injected easily, the grout can be stirred and mixed with upper bedrock after filling a drilling cavity to achieve compactness and then generate high pressure, the wall protection sleeve 3 can be pushed backwards to retreat (namely, the wall protection sleeve 3 moves backwards) after the high pressure is generated, the cavity is reserved again, the operation is circulated, and sealing operation is performed after grouting and pile forming. The mixed depth of the lower rock soil is much shallower than that of the upper layer, so that a lot of materials are saved, and the excavation contour line is required to be cleared.
By adopting the horizontal drilling rotary jet grouting pile-forming device, the wall protection sleeve 3 is arranged, so that the phenomenon of borehole collapse when the drill rod 5 and the drilling bit 6 are withdrawn from the borehole is avoided; the grouting drill bit 7 penetrates through the wall protection sleeve 3, so that the situation that the grouting drill bit 7 penetrates through a collapsed hole is avoided, the grouting drill bit 7 cannot embrace and clamp the drill, and the service life of the grouting drill bit 7 is prolonged; in the construction process, the drill rod 5 is not required to be disassembled and assembled, and only the drill bit is required to be replaced, so that the engineering construction speed can be quickly improved; due to the arrangement of the retaining wall sleeve 3, the phenomenon of slurry waste caused by pressure relief of slurry from an orifice in the traditional construction process can be reduced, the slurry discarding amount in the construction process is reduced, and the construction material cost is reduced; the horizontal drilling rotary jet grouting pile forming device is suitable for treating bad sections such as silt, clay or gravel and the like in underground tunneling engineering, and has the advantages of stable pile forming quality and pile diameter meeting design requirements.
Preferably, referring to fig. 3 to 5 and fig. 7 to 9, in the present invention, a gas injection channel 501 and a grouting channel 502 are provided in the drill pipe 5, the gas injection channel 501 and the grouting channel 502 are both parallel to the axial direction of the drill pipe 5, and the gas injection channel 501 and the grouting channel 502 are used for delivering high-pressure air and grout, respectively. When the other end of the drill rod 5 is connected with the impactor 601, the gas injection channel 501 is communicated with the impactor 601, and high-pressure air is conveyed into the impactor 601 through the gas injection channel 501 to provide power for the impactor 601; when the other end of the drill rod 5 is communicated with the grouting drill bit 7, high-pressure air is conveyed into the grouting drill bit 7 through the air injection channel 501, and grout is conveyed into the grouting drill bit 7 through the grouting channel 502 to realize the rotary injection grouting process.
Optionally, the grouting drill 7 is provided with an air outlet 702 and a grout outlet 704 arranged along the radial direction, and the grouting drill 7 is further provided with an air inlet passage 701 and a grout inlet passage 703, wherein the air inlet passage 701 and the grout inlet passage 703 are respectively communicated with the air outlet 702 and the grout outlet 704. During grouting, the other end of the drill rod 5 is communicated with a grouting drill bit 7, the air inlet passage 701 is communicated with the air injection passage 501, and the grout inlet passage 703 is communicated with the grouting passage 502.
Preferably, the rotary spraying grouting mechanism further comprises a pipe shoe 8, the pipe shoe 8 is of a hollow annular structure, the outer wall of the pipe shoe 8 is in a step shape, an external thread is arranged at the small-diameter end of the pipe shoe 8, an internal thread is arranged at one end, far away from the front power head 2, of the retaining wall sleeve 3, and the small-diameter end of the pipe shoe 8 is detachably connected with one end, far away from the front power head 2, of the retaining wall sleeve 3 through a thread. The inner wall diameter of the pipe shoe 8 is smaller than that of the drill rod 5, after the pipe shoe 8 is assembled, the inner wall of the pipe shoe 8 and the inner wall of the retaining wall casing 3 form a stepped structure, and in the drilling process, the pipe shoe 8 provides a stress point for the drill rod 5, so that the drill rod 5 can provide jacking power for the retaining wall casing 3 by means of the stress point. The diameter of the inner wall of the pipe shoe 8 is greater than or equal to the diameter of the outer wall of the impactor 601, and the impactor 601 can be disposed through the pipe shoe 8. If necessary, the impactor 601 may be connected to the other end of the retaining sleeve 3 by means of an adapter 603.
The outer wall of the middle part of the grouting drill bit 7 is provided with an annular bulge, the diameter of the inner wall of the annular bulge is smaller than or equal to that of the inner wall of the retaining wall sleeve 3, and the diameter of the outer wall of the annular bulge is larger than that of the inner wall of the pipe shoe 8. During the slip casting, annular arch forms seal structure with pipe shoe 8 butt, can prevent that the slip casting from spouting the in-process soon, and the thick liquid flows back to in the dado sleeve pipe 3, has improved the utilization efficiency of thick liquid.
In the scheme, the front power head 2 and the rear power head 4 are detachably connected through fasteners (not shown in the figure), and the fasteners can be buckles. Specifically, first support frame passes through the fastener with the second support frame and can dismantle the connection, and drilling and slip casting in-process are together fixed with preceding unit head 2 and back unit head 4, can realize that drilling rod 5 and dado sleeve pipe remove simultaneously.
Referring to fig. 10, the invention provides a construction method based on the horizontal drilling rotary jet grouting pile forming device in another aspect. The method comprises the following specific steps:
s1, paying off, and marking drilling point positions;
s2, installing the wall protection sleeve 3 and the drill rod 5, installing the wall protection sleeve 3 on the front power head 2, and installing the drill rod 5 on the rear power head 4;
s3, positioning, and controlling a traveling mechanism to adjust the position of the rotary spraying grouting mechanism; controlling an azimuth angle adjusting mechanism to adjust the azimuth angle of the rotary spraying grouting mechanism; controlling a height elevation angle adjusting mechanism to adjust the height and elevation angle of the rotary spraying grouting mechanism;
s4, installing a drilling bit 6, installing the drilling bit 6 at the other end of the drill rod 5, sliding the front power head 2 and the rear power head 4 to the rear end of the carriage 1, so that the drill rod 5 is sleeved in the wall protection sleeve 3, and the drilling bit 6 penetrates through the wall protection sleeve 3, so that the drill rod 5 is arranged towards the direction of a drilling point;
s5, drilling to form a hole, controlling the front power head 2 and the rear power head 4 to move towards the front end of the sliding frame 1 at the same time, driving the protective wall sleeve 3 to drill a hole in the structural layer by the drilling bit 6, and stopping drilling until the designed hole depth is reached; high-pressure air is filled into the impactor 601 through the drill rod 5 to impact and crush rock soil, and the high-pressure air is used for discharging the fragments to be jacked into the retaining wall casing 3.
S6, replacing the grouting drill bit 7, controlling the rear power head 4 to slide to the rear end of the sliding frame 1, replacing the grouting drill bit 7 with the drill bit, and controlling the rear power head 4 to slide to the front end of the sliding frame 1, so that the grouting drill bit 7 penetrates through the retaining wall sleeve 3;
s7, performing rotary jetting and retreating, injecting high-pressure air and slurry into the drill hole through the drill rod 5 and the grouting drill bit 7, and controlling the front power head 2 and the rear power head 4 to enable the retaining wall sleeve 3 and the grouting drill bit 7 to withdraw from the drill hole;
s8, plugging the hole of the drilling hole;
and repeating the steps S3 to S8 until the construction is finished.
Compared with the prior art, the horizontal drilling rotary jet grouting pile-forming construction method and the horizontal drilling rotary jet grouting pile-forming device have the same advantages, and the detailed description is omitted. In addition, by adopting the construction method, the drilling hole does not need to be provided with a hole opening sealing device, and the slurry can not return to the hole opening under the control of reasonable advancing and retreating speed.
Further, step S5 includes inputting air into the drill bit 6 through the drill rod 5;
in step S7, the front power head 2 and the rear power head 4 are moved back intermittently to withdraw the retaining wall sleeve 3 and the grouting drill 7 from the borehole, and the distance of each backward movement is 10 cm.
Further, in steps S5 and S7, the front power head 2 and the rear power head 4 are connected by fasteners; in the other steps, the front power head 2 and the rear power head 4 are not connected. During drilling and jet grouting, the front power head 2 and the rear power head 4 are connected through a buckle to realize synchronous advance and retreat, and the stability of pore-forming is improved.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (10)
1. A horizontal drilling rotary jet grouting pile-forming device is characterized by comprising:
the traveling mechanism is used for adjusting the position of the rotary spraying grouting mechanism;
the azimuth angle adjusting mechanism is used for adjusting the azimuth angle of the rotary jet grouting mechanism;
the height elevation angle adjusting mechanism is used for adjusting the height and the elevation angle of the rotary jet grouting mechanism;
the rotary spraying grouting mechanism comprises a sliding frame (1), a front power head (2), a wall protection sleeve (3), a rear power head (4), a drill rod (5) and a drill bit, the sliding frame (1) is connected with the front power head (2) and the rear power head (4) in a sliding way, the front power head (2) is detachably connected with a wall protection sleeve (3), the front power head (2) is used for driving the wall protection sleeve (3) to move along the front-back direction, the rear power head (4) is detachably connected with one end of a drill rod (5), the rear power head (4) is used for driving the drill rod (5) to rotate and move along the front and rear directions, the drill rod (5) and the wall protection sleeve (3) are coaxially arranged, and the outer diameter of the drill rod (5) is smaller than the diameter of the inner wall of the wall protection sleeve (3), the other end of the drill rod (5) is detachably connected with a drill bit, and the drill bit comprises a drilling drill bit (6) and a grouting drill bit (7).
2. The horizontal drilling rotary jet grouting pile-forming device as claimed in claim 1,
the drilling drill bit (6) comprises an impactor (601) and a percussion drill bit (602), the other end of the drill rod (5), the impactor (601) and the percussion drill bit (602) are sequentially detachably connected during drilling, and the impactor (601) penetrates through the wall protection sleeve (3);
during grouting, the other end of the drill rod (5) is detachably connected with the grouting drill bit (7), and the grouting drill bit (7) penetrates through the retaining wall sleeve (3).
3. The horizontal drilling rotary jet grouting pile forming device as claimed in claim 2, characterized in that a gas injection channel (501) and a grouting channel (502) are arranged in the drill rod (5), the gas injection channel (501) is selectively communicated with the impactor (601) during drilling, and the gas injection channel (501) and the grouting channel (502) are selectively communicated with the grouting drill bit (7) during grouting.
4. Horizontal drilling rotary jet grouting pile forming device according to claim 1, characterized in that the grouting drill bit (7) comprises:
an air intake passage (701) selectively communicating with the air injection passage (501);
the air outlet hole (702) is arranged along the radial direction of the grouting drill bit (7) and is communicated with the air inlet channel (701);
a slurry inlet channel (703) selectively communicating with the grouting channel (502);
and the slurry outlet hole (704) is arranged along the radial direction of the grouting drill bit (7) and is communicated with the slurry inlet channel (703).
5. The horizontal drilling rotary jet grouting pile-forming device as claimed in claim 4,
the rotary spraying grouting mechanism further comprises a pipe shoe (8), the pipe shoe (8) is of a hollow annular structure, the outer wall of the pipe shoe (8) is in a step shape, the small-diameter end of the pipe shoe (8) is detachably connected with one end, far away from the front power head (2), of the wall protecting sleeve (3), the diameter of the inner wall of the pipe shoe (8) is smaller than that of the inner wall of the drill rod (5), and the diameter of the inner wall of the pipe shoe (8) is larger than or equal to that of the outer wall of the impactor (601);
the outer wall of the middle of the grouting drill bit (7) is provided with an annular bulge, the diameter of the inner wall of the annular bulge is smaller than or equal to that of the inner wall of the retaining wall casing (3), and the diameter of the outer wall of the annular bulge is larger than that of the inner wall of the pipe shoe (8).
6. The horizontal drilling rotary jet grouting pile-forming device as claimed in claim 5,
the travelling mechanism is a crawler travelling mechanism (9);
the azimuth angle adjusting mechanism comprises a support (10), a support bracket (11), a first power telescopic part (12), a rotating rod (13), a first gear (14) and a first rack (15), wherein the support (10) is fixedly arranged above the crawler traveling mechanism (9), the support bracket (11) is fixedly arranged on the upper surface of the support (10), the support bracket (11) is inverted omega-shaped, the rotating rod (13) is connected in the support bracket (11) in a rotating way, the first gear (14) is fixedly connected on the outer side wall of the rotating rod (13) in a coaxial way, the fixed end of the first power telescopic part (12) is fixedly connected on the upper surface of the support (10), the movable end of the first power telescopic part (12) is fixedly connected with the first rack (15), and the first rack (15) is connected with the upper surface of the support (10) in a sliding way, and the first rack (15) is meshed with the first gear (14);
the height and elevation angle adjusting mechanism comprises a second power telescopic piece (18) and a third power telescopic piece (19), the lower end of the second power telescopic piece (18) is hinged with the side wall of the rear end of the rotating rod (13), and the upper end of the second power telescopic rod is hinged with the front end of the sliding frame (1); the lower end of the third power telescopic piece (19) is hinged to the side wall of the front end of the rotating rod (13), and the upper end of the third power telescopic rod is hinged to the rear end of the sliding frame (1).
7. The horizontal drilling rotary jet grouting pile-forming device as claimed in claim 1, wherein the front power head (2) and the rear power head (4) are detachably connected through a fastener.
8. A construction method based on the horizontal drilling rotary jet grouting pile forming device of any one of claims 1-7 is characterized by comprising the following steps:
s1, paying off, and marking drilling point positions;
s2, installing the wall protection sleeve (3) and the drill rod (5), installing the wall protection sleeve (3) on the front power head (2), and installing the drill rod (5) on the rear power head (4);
s3, positioning, namely controlling the travelling mechanism to adjust the position of the rotary jet grouting mechanism; controlling the azimuth angle adjusting mechanism to adjust the azimuth angle of the rotary spraying grouting mechanism; controlling the height elevation angle adjusting mechanism to adjust the height and elevation angle of the rotary spraying grouting mechanism;
s4, installing a drilling bit (6), installing the drilling bit (6) at the other end of the drill rod (5), sliding the front power head (2) and the rear power head (4) to the rear end of the sliding frame (1), so that the drill rod (5) is sleeved in the wall protection sleeve (3), and the drilling bit (6) penetrates through the wall protection sleeve (3) to be arranged, so that the drill rod (5) is arranged towards the drilling point position;
s5, drilling to form a hole, controlling the front power head (2) and the rear power head (4) to move towards the front end of the sliding frame (1) simultaneously, driving the protective wall sleeve (3) to drill a hole in the structural layer by the drilling bit (6), and stopping after the hole is drilled to the designed hole depth;
s6, replacing the grouting drill bit (7), controlling the rear power head (4) to slide to the rear end of the sliding frame (1), replacing the grouting drill bit (7) with the rear power head (4), and controlling the rear power head (4) to slide to the front end of the sliding frame (1) so that the grouting drill bit (7) penetrates through the retaining wall sleeve (3);
s7, performing rotary jetting and retreating, injecting air and slurry into the drill hole through the drill rod (5) and the grouting drill bit (7), and controlling the front power head (2) and the rear power head (4) to enable the wall protection sleeve (3) and the grouting drill bit (7) to withdraw from the drill hole;
s8, plugging the drilling hole;
and repeating the steps S3 to S8 until the construction is finished.
9. The horizontal drilling rotary jet grouting pile-forming construction method as claimed in claim 8,
the step S5 further includes inputting air into the drilling bit (6) through the drill rod (5);
in step S7, the front power head (2) and the rear power head (4) withdraw the retaining wall sleeve (3) and the grouting drill bit (7) from the borehole in an intermittent withdrawal manner.
10. The horizontal drilling rotary jet grouting pile-forming construction method as claimed in claim 9, wherein in the steps S5 and S7, the front power head (2) and the rear power head (4) are connected by a fastener; in other steps, the front power head (2) and the rear power head (4) are not connected.
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| CN202210670837.1A CN114960632A (en) | 2022-06-15 | 2022-06-15 | Horizontal drilling rotary jet grouting pile forming device and construction method thereof |
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| CN202210670837.1A CN114960632A (en) | 2022-06-15 | 2022-06-15 | Horizontal drilling rotary jet grouting pile forming device and construction method thereof |
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| CN116290123A (en) * | 2023-05-17 | 2023-06-23 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Device and method for preventing soil layer above bedrock hole from collapsing |
| CN117052306A (en) * | 2023-10-10 | 2023-11-14 | 中国建筑一局(集团)有限公司 | Tunnel water detection drilling equipment and advanced drilling water detection grouting water shutoff method |
| CN117328797A (en) * | 2023-12-01 | 2024-01-02 | 山西八建集团有限公司 | Pile foundation collapse prevention perforating device for pile foundation construction |
| CN117514197A (en) * | 2023-12-11 | 2024-02-06 | 济南中优城市发展投资集团有限公司 | Reinforcement device for jet grouting and reinforcement method thereof |
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| CN117514197A (en) * | 2023-12-11 | 2024-02-06 | 济南中优城市发展投资集团有限公司 | Reinforcement device for jet grouting and reinforcement method thereof |
| CN117514197B (en) * | 2023-12-11 | 2024-04-02 | 济南中优城市发展投资集团有限公司 | Reinforcement device for jet grouting and reinforcement method thereof |
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