CN114164825A - High-pressure rotary jet grouting machine and application method thereof - Google Patents
High-pressure rotary jet grouting machine and application method thereof Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000003780 insertion Methods 0.000 claims description 54
- 230000037431 insertion Effects 0.000 claims description 54
- 238000005553 drilling Methods 0.000 claims description 46
- 239000007921 spray Substances 0.000 claims description 46
- 239000007788 liquid Substances 0.000 claims description 45
- 238000003860 storage Methods 0.000 claims description 30
- 239000002689 soil Substances 0.000 claims description 29
- 238000005507 spraying Methods 0.000 claims description 28
- 239000002002 slurry Substances 0.000 claims description 25
- 239000004568 cement Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000009826 distribution Methods 0.000 claims description 10
- 238000013461 design Methods 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- 239000011435 rock Substances 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 10
- 239000004927 clay Substances 0.000 abstract description 7
- 230000000875 corresponding effect Effects 0.000 description 3
- 230000036961 partial effect Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000007596 consolidation process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000010959 steel Substances 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
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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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
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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
- E21B7/04—Directional drilling
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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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- 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
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Soil Sciences (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention belongs to the technical field of foundation engineering, and relates to a high-pressure rotary jet grouting machine and a using method thereof. The method has the advantages that the diameter of the jet grouting pile can be controlled, the phenomena of low reliability and hole collapse of the high-pressure jet grouting pile under the geology with stronger flow plasticity or plastic clay property can be effectively avoided, the engineering cost can be saved, and the orderly construction can be ensured.
Description
Technical Field
The invention belongs to the technical field of foundation engineering, and relates to a high-pressure rotary jet grouting machine tool and a using method thereof, in particular to a high-pressure rotary jet grouting machine tool capable of quickly and locally plugging and reinforcing a stratum in a water-rich weak and broken zone and a using method thereof.
Background
At present, under the geological conditions of silt, mucky soil, plastic soft plastic or plastic cohesive soil, silt, sandy soil, loess, plain filling soil, gravel soil and the like, in the projects of foundation reinforcement treatment, foundation pit bottom reinforcement and the like of existing buildings and newly-built buildings, high-pressure jet grouting piles are generally adopted for improving the bearing capacity of the foundation.
The rotary jet grouting pile is formed by rotary jet grouting, the conventional rotary jet grouting is to drill a hole (with the aperture of 50-127 mm, for example) in a soil layer, then the rotary jet grouting slurry is sprayed out through a drill rod through a nozzle (with the diameter of 1.5-2.5 mm, for example) to form a high-speed jet flow, the slurry jet flow cuts foundation soil, the cut foundation soil can be stirred and mixed with the grouting slurry, the nozzle is used for spraying, rotating and lifting simultaneously, and finally, a soil body is cemented to form a columnar consolidation body, namely the rotary jet grouting pile, and the maximum diameter of the columnar consolidation body can reach 4 m.
However, the existing high-pressure jet grouting machine directly damages the soil body by high-pressure jet flow, and due to the fluidity of grouting cement slurry, the diameter of the finally formed jet grouting pile is generally larger, and the grouting requirement cannot be met in the foundation engineering needing to pour the small-diameter jet grouting pile. In addition, in the geological condition that the flowing plastic soft plasticity or the plastic clay property is stronger, the reliability of the rotary spraying pile poured in the actual construction of the existing high-pressure rotary spraying grouting machine is lower, the hole collapse phenomenon often occurs, the engineering cost can be directly increased, and the construction period is delayed.
To sum up, in order to better pour the jet grouting pile under the geological conditions of flow plastic soft plasticity or plastic clay property, control the construction cost of foundation engineering, and guarantee the normal construction period delivery of the engineering, the high-pressure jet grouting machine suitable for pouring the small-diameter jet grouting pile under the geological conditions of silt, mucky soil, flow plastic soft plastic or plastic cohesive soil, silt, sandy soil, loess, plain filling soil, gravel soil and the like needs to be researched and developed, which becomes the problem to be solved urgently.
Disclosure of Invention
The high-pressure jet grouting machine and the use method thereof can control the diameter of the jet grouting pile, can effectively avoid the phenomena of low reliability and hole collapse of the high-pressure jet grouting pile under the geology with stronger flow plasticity or mouldability clay, can save the engineering cost and ensure the orderly construction.
The technical scheme of the invention comprises the following steps: high pressure jet grouting machines, including the spray tube, the entrance point of spray tube is connected with mixed liquid storage tank through pipeline, and the outside of spray tube is equipped with radially to leave the space between intubate and spray tube and the intubate, the pipe wall of intubate is equipped with the trompil, the distribution density that the trompil distributes and the trompil along axial and circumferential direction is negative relevant with the diameter of intubate, mixed liquid in mixed liquid storage tank passes through pipeline and gets into behind the spray tube through the spray tube gap between spray tube and the intubate and forms the jet body by the trompil blowout of intubate.
The technical scheme of the invention also comprises: the mixed liquid storage tank comprises a first mixed liquid storage tank for storing high-pressure water and air and a second mixed liquid storage tank for storing ultrahigh-pressure cement slurry and air, the first mixed liquid storage tank is communicated with the inlet end of the spray pipe through a first mixed liquid conveying pipeline, and the second mixed liquid storage tank is communicated with the inlet end of the spray pipe through a second mixed liquid conveying pipeline.
The technical scheme of the invention also comprises: the jet pipe is connected with a control system for controlling the rotary jet speed, the lifting speed and/or the jet pressure of the jet pipe, the control system is connected with the mixed liquid storage tank and/or the conveying pipeline, and a display interface of the control system comprises the initial setting time of slurry, the grouting flow, the grouting pressure, the rotary jet speed, the lifting speed and/or the jet pressure information.
The invention also provides a use method of the high-pressure jet grouting machine, the insertion pipe and the jet pipe are inserted into the stratum to a preset depth, the control system controls the jet pipe to jet grouting in a jet mode to form a jet grouting pile, and the jet grouting pile is formed by the insertion pipe and injected cement paste.
The technical scheme of the invention also comprises: before the insertion pipe and the spray pipe are inserted to the preset depth of the stratum, a drilling machine is used for drilling, the formed drilled hole is required to ensure that the deflection of the spray pipe is not more than 1.5%, and the caliber size of the drilled hole is 20-50 mm larger than the outer diameter size of the insertion pipe.
The technical scheme of the invention also comprises: the drilling machine is kept vertical at the drilling hole position, the deviation of the drilling position and the design position is not more than 50mm,
among them, in sandy soil and cohesive soil layers, a rotary vibration drilling machine is used, and in hard ground layers, a geological drilling machine is used.
The technical scheme of the invention also comprises: when the rotary vibration drilling machine is used for drilling, drilling and inserting the insertion pipe are carried out simultaneously, and then the spray pipe is inserted into the insertion pipe to a preset depth;
when the geological drilling machine is used for drilling, after drilling is finished, the rock core pipe is pulled out, the insertion pipe is inserted to the preset depth of the stratum, and then the spray pipe is inserted to the preset depth of the insertion pipe.
The technical scheme of the invention also comprises: when the spray pipe is inserted, the pipe is inserted while water is jetted, and the pressure of the jetted water is not more than 1 MPa.
The technical scheme of the invention also comprises: and the control system controls the spray pipe to carry out rotary spraying grouting to form the rotary spraying pile, and whether the initial setting time of the slurry, the grouting flow, the grouting pressure and the rotating lifting speed meet the design requirements or not and whether the open pore of the insertion pipe is blocked and recorded or not are checked.
The technical scheme of the invention also comprises: and after the control system controls the jet pipe to carry out jet grouting to form the jet pile, washing the residual cement slurry in the jet pipe.
The invention has the following beneficial effects: the insertion pipe is arranged on the outer side of the jet pipe, and the hole is formed in the insertion pipe, so that injected cement slurry cannot be directly sprayed to the soil body through the jet pipe, but can be blocked by the insertion pipe firstly, and then is sprayed to the soil body through the hole in the insertion pipe. Therefore, the insertion pipes with different sizes can be selected according to the diameter of the jet grouting pile required by the engineering, the diameter of the jet grouting pile can be controlled, the problem that the existing jet grouting machine is difficult to manufacture the small-diameter jet grouting pile is solved, the density of the opening of the insertion pipe and the diameter of the insertion pipe are designed in a negative correlation mode, namely, if the diameter of the jet grouting pile required by the actual engineering is smaller, the insertion pipe with the small diameter can be used, the distribution density of the opening is increased at the moment, and normal slurry return and slurry outflow during jet are guaranteed; when the jet grouting pile diameter that needs is great, can use the intubate of major diameter, the distribution density of trompil reduces this moment to can form the jet grouting pile who stabilizes the solidification with the soil body on every side after guaranteeing to spray, and then guarantee the safety improvement foundation of ground's bearing capacity. In addition, the injected cement paste is firstly blocked by the insertion pipe before being sprayed to the soil body, so that the direct impact force on the soil body can be properly weakened, and the phenomena of low reliability and hole collapse of the high-pressure jet grouting pile under the geology with stronger flow plasticity or mouldability clay are avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be 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 inventive labor.
Fig. 1 is a schematic diagram of an embodiment.
Wherein:
1. the device comprises a control system, 2, a first mixed liquid storage tank, 3, a second mixed liquid storage tank, 4, a second mixed liquid conveying pipeline, 5, a first mixed liquid conveying pipeline, 6, a spray pipe, 7, an insertion pipe, 71, a hole, 8, a mud discharging system, 9, a spraying body, 10 and a drill bit.
Detailed Description
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
In this document, terms such as "upper, lower, left, right, inner, and outer" are established based on the positional relationship shown in the drawings, and the corresponding positional relationship may vary depending on the drawings, and therefore, the terms are not to be construed as an absolute limitation of the protection scope; moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements. In the embodiments of the present invention, "above", "below", and the like include the present numbers.
As shown in fig. 1, the high-pressure rotary jet grouting machine according to the embodiment of the present invention includes a nozzle 6, and an inlet end of the nozzle 6 is connected to a mixed liquid storage tank through a transfer pipe, so that the mixed liquid can be supplied from the mixed liquid storage tank to the nozzle 6 through the transfer pipe, and specifically, a nozzle is installed on the nozzle 6, and the mixed liquid can be finally sprayed from the nozzle installed on the nozzle 6.
In order to meet the construction requirement of a small-diameter jet grouting pile in engineering and avoid the phenomena of low reliability and hole collapse of the jet grouting pile under the geological condition of relatively strong flow plastic soft plasticity or plastic clay property, the insertion pipe 7 is arranged on the outer side of the jet pipe 6, and a gap is reserved between the jet pipe 6 and the insertion pipe 7 in the radial direction, wherein the radial direction refers to the radial direction of the jet pipe 6 or the insertion pipe 7. And, there are openings 71 in the tube wall of the cannula 7, and this opening 71 distributes in axial and circumferential direction and the distribution density of the opening 71 is inversely correlated with the diameter of the cannula 7. The axial direction and the circumferential direction refer to the axial direction and the circumferential direction of the insertion tube 7, and as for the distribution mode of the holes 71 on the insertion tube 7, the holes can be distributed regularly or randomly as required. However, the distribution density of the openings 71 needs to be distributed according to a rule with negative correlation with the diameter of the insertion pipe 7, specifically, if the diameter of the jet grouting pile required in the actual engineering is smaller, the insertion pipe 7 with a small diameter can be used, and the distribution density of the openings 71 is increased at the moment so as to ensure normal slurry return and slurry outflow during the spraying; when the required jet grouting pile is large in diameter, the large-diameter insertion pipe 7 can be used, and the distribution density of the opening holes 71 is reduced, so that the jet grouting pile can form a stably solidified jet grouting pile with the surrounding soil body after jet, and the safety of the foundation is guaranteed, and the bearing capacity of the foundation is improved.
In this embodiment, the flow path of the mixed liquid (e.g., cement slurry) is such that the mixed liquid in the mixed liquid storage tank first enters the nozzle 6 through the transfer pipe, is ejected through the nozzle of the nozzle 6, then enters the gap between the nozzle 6 and the insert pipe 7, and then is ejected through the opening 71 of the insert pipe 7 to form the ejection body 9. The injected mixed liquid can not be directly sprayed to the soil body, but is firstly blocked by the insertion pipe 7, so that the direct impact force on the soil body can be properly weakened, and the phenomena of low reliability and hole collapse of the high-pressure jet grouting pile under the geology with stronger flow plasticity or plastic clay property are avoided.
In the embodiment of the present invention, the mixed liquid storage tank includes a first mixed liquid storage tank 2 for storing high-pressure water and air and a second mixed liquid storage tank 3 for storing ultra-high pressure water slurry and air, wherein the first mixed liquid storage tank 2 is communicated with the inlet end of the spray pipe 6 through a first mixed liquid delivery pipe 5 to supply the high-pressure water and air into the spray pipe 6, and the second mixed liquid storage tank 3 is communicated with the inlet end of the spray pipe 6 through a second mixed liquid delivery pipe 4 to supply the cement slurry and air into the spray pipe 6.
In the embodiment of the invention, a control system 1 is further designed, and the control system 1 is connected with a spray pipe 6, a first mixed liquid storage tank 2, a second mixed liquid storage tank 3, a first mixed liquid conveying pipeline 5 and a second mixed liquid conveying pipeline 4, so that one or more parameters of the rotary spraying speed, the lifting speed, the spraying pressure and the like of the spray pipe 6 in the rotary spraying grouting can be adjusted, and parameters of the slurry initial setting time, the grouting flow, the grouting pressure and the like can be controlled. Of course, this embodiment is only an example, and other parameters may be specifically controlled and adjusted according to requirements, or when grouting parameters need to be controlled in a focused manner, the control system 1 may be selectively connected to the mixed liquor storage tank or the corresponding delivery pipe separately, or connected to the mixed liquor storage tank and the corresponding delivery pipe simultaneously.
On the other hand, the invention also provides a use method of the high-pressure rotary jet grouting machine, and the specific structure of the high-pressure rotary jet grouting machine is as described above and is not repeated.
In the embodiment of the invention, when the construction of the jet grouting pile of the foundation engineering is required, the construction can be carried out according to the following steps:
drilling: and (3) drilling holes at the hole site positions designed by the drawing by using a drilling machine, wherein the drilling machine is kept vertical to the drilling hole sites in the drilling process, and the formed drilling holes ensure that the deflection of the subsequent spray pipes 6 is not more than 1.5 percent. In addition, the caliber size of the drilled hole is designed to be 20-50 mm larger than the outer diameter size of the insertion pipe 7.
In the drilling, the deviation of drilling position and design position must not be more than 50mm, and when in sand and cohesive soil layer, use rotatory vibration drilling machine, specifically can select for use 76 type rotatory vibration drilling machine. Alternatively, when drilling in a relatively hard formation, a geological drilling rig is used.
Grouting: the insertion pipe 7 and the spray pipe 6 are inserted into the stratum to the preset depth, the control system 1 controls the spray pipe 6 to carry out rotary jet grouting and form a rotary jet grouting pile, wherein the rotary jet grouting pile is formed by the insertion pipe 7 and injected cement together, namely the insertion pipe 7 is embedded into soil and the injected cement together form the rotary jet grouting pile.
The insertion mode of the insertion tube 7 may be different according to the drilling mode, and specifically, when the rotary vibration drilling machine is used for drilling, the drilling and the insertion tube 7 insertion are performed simultaneously, that is, two processes of drilling and insertion of the insertion tube 7 are performed, and the two processes are one, and the insertion operation of the insertion tube 7 is performed simultaneously when the drilling operation is completed. The nozzle 6 is then inserted into the cannula 7 to a predetermined depth for jet grouting.
When the geological drilling machine is used for drilling, after the drilling is finished, the core barrel needs to be pulled out, then the steel structure insertion pipe 7 with the opening 71 is replaced and inserted into the predetermined depth, and finally the jet pipe 6 is inserted into the predetermined depth in the insertion pipe 7 for rotary jet grouting.
In addition, during the insertion process of the insertion pipe 7, in order to prevent sand blockage, the insertion pipe can be inserted while water is jetted, and the pressure of the jetted water is generally not more than 1MPa, so that the collapse of the drill hole due to too much water pressure is avoided.
After the spray pipe 6 is inserted into a preset depth, the rotary spraying grouting work can be carried out from top to bottom. In the grouting process, the rotary spraying speed and the lifting speed of the spray pipe 6 are set according to certain engineering experience and data and controlled by the control system 1, so that the formed rotary spraying cement pile is compact and firm, and the requirements for later strength and pressure resistance are met. And in consideration of meeting the requirements of engineering, in the rotary spraying process, the rotary spraying speed and the lifting speed can be adjusted, the spraying pressure is increased or decreased, or the hole diameter of the nozzle is changed to change the flow, so that the formed solidification body is in a shape required by design. And in the rotary spraying process, engineering operators on duty must constantly pay attention to check whether parameters such as the initial setting time of the grout, the grouting flow, the grouting pressure, the rotation lifting speed and the like displayed by the control system 1 meet design requirements and whether plugging phenomenon of the pipe inserting hole structure occurs or not, make real-time records and draw an operation process curve.
A washing step: after the rotary spraying grouting forms the rotary spraying pile, the rotary spraying pile operation of one hole site is completed, and the high-pressure rotary spraying grouting machine can be washed by considering the use requirement of subsequent operation on the high-pressure rotary spraying grouting machine. Specifically, after the rotary jet grouting work of a hole site is finished, machines such as the rotary jet pipe 6 and the like are washed clean, and cement slurry does not remain in the machine in the jet pipe 6. The general flushing method is to change the slurry into water and spray the water on the ground so as to completely clean the slurry in the slurry pump, the spray pipe 6 and the hose, and facilitate the next construction and use. When other hole sites of the project need to be subjected to rotary spraying grouting, only the equipment such as a drilling machine and the like needs to be moved to the position of the next hole site, and then the steps are repeated.
In the case that the embodiments are not contradictory, at least some of the technical solutions in the embodiments may be recombined to form the essential technical solution of the present invention, and of course, the embodiments may also be cited or included in each other. Moreover, it should be noted that adaptive modifications (such as partial addition, partial deletion, and partial modification) made by those skilled in the art when recombining technical means described in each embodiment will also fall within the scope of the present invention.
The technical principles of the present invention have been described above in connection with specific embodiments, but it should be noted that the above descriptions are only for the purpose of explaining the principles of the present invention, and should not be construed as specifically limiting the scope of the present invention in any way. Based on the explanations herein, those skilled in the art will appreciate that other embodiments of the present invention or equivalents thereof without inventive step, are also within the scope of the present invention.
Claims (10)
1. The utility model provides a high pressure jet grouting machines which characterized in that: including spray tube (6), the entrance point of spray tube (6) is connected with mixed liquid storage tank through pipeline, and the outside of spray tube (6) is equipped with intubate (7) and radially leaves the space between spray tube (6) and intubate (7), the pipe wall of intubate (7) is equipped with trompil (71), trompil (71) are along the diameter negative correlation of axial and circumference direction distribution and the distribution density of trompil (71) and intubate (7), mixed liquid in the mixed liquid storage tank passes through pipeline and gets into behind spray tube (6) through the clearance between spray tube (6) and intubate (7) and is formed by trompil (71) blowout injection body (9) of intubate (7).
2. The high-pressure jet grouting machine of claim 1, wherein: the mixed liquid storage tank comprises a first mixed liquid storage tank (2) for storing high-pressure water and air and a second mixed liquid storage tank (3) for storing ultrahigh-pressure cement paste and air, wherein the first mixed liquid storage tank (2) is communicated with the inlet end of the spray pipe (6) through a first mixed liquid conveying pipeline (5), and the second mixed liquid storage tank (3) is communicated with the inlet end of the spray pipe (6) through a second mixed liquid conveying pipeline (4).
3. The high-pressure jet grouting machine of claim 1, wherein: the jet pipe (6) is connected with a control system (1) for controlling the rotary jet speed, the lifting speed and/or the jet pressure of the jet pipe (6), the control system (1) is connected with a mixed liquid storage tank and/or a conveying pipeline, and a display interface of the control system (1) comprises the initial setting time of slurry, the grouting flow, the grouting pressure, the rotary jet speed, the lifting speed and/or the jet pressure information.
4. A method for using a high-pressure rotary jet grouting machine as claimed in any one of claims 1 to 3, characterized in that: the method comprises the steps of inserting an insertion pipe and a spray pipe to a preset depth of a stratum, and controlling the spray pipe to carry out rotary spraying grouting to form a rotary spraying pile by a control system, wherein the rotary spraying pile is formed by the insertion pipe and injected cement slurry together.
5. The use method of the high-pressure rotary jet grouting machine and tool as claimed in claim 4, characterized in that: before the insertion pipe and the spray pipe are inserted to the preset depth of the stratum, a drilling machine is used for drilling, the formed drilled hole is required to ensure that the deflection of the spray pipe is not more than 1.5%, and the caliber size of the drilled hole is 20-50 mm larger than the outer diameter size of the insertion pipe.
6. The use method of the high-pressure rotary jet grouting machine and tool as claimed in claim 5, characterized in that: the drill is kept vertical at the drilling hole position, the deviation of the drilling position from the design position is not more than 50mm, wherein, in sandy soil and cohesive soil layers, a rotary vibration drill is used, and in hard strata, a geological drill is used.
7. The use method of the high-pressure rotary jet grouting machine and tool as claimed in claim 6, characterized in that: when the rotary vibration drilling machine is used for drilling, drilling and inserting the insertion pipe are carried out simultaneously, and then the spray pipe is inserted into the insertion pipe to a preset depth;
when the geological drilling machine is used for drilling, after drilling is finished, the rock core pipe is pulled out, the insertion pipe is inserted to the preset depth of the stratum, and then the spray pipe is inserted to the preset depth of the insertion pipe.
8. The use method of the high-pressure rotary jet grouting machine and tool as claimed in claim 4, characterized in that: when the spray pipe is inserted, the pipe is inserted while water is jetted, and the pressure of the jetted water is not more than 1 MPa.
9. The use method of the high-pressure rotary jet grouting machine and tool as claimed in claim 4, characterized in that: and the control system controls the spray pipe to carry out rotary spraying grouting to form the rotary spraying pile, and whether the initial setting time of the slurry, the grouting flow, the grouting pressure and the rotating lifting speed meet the design requirements or not and whether the open pore of the insertion pipe is blocked and recorded or not are checked.
10. The use method of the high-pressure rotary jet grouting machine and tool as claimed in claim 4, characterized in that: and after the control system controls the jet pipe to carry out jet grouting to form the jet pile, washing the residual cement slurry in the jet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010947727.6A CN114164825A (en) | 2020-09-10 | 2020-09-10 | High-pressure rotary jet grouting machine and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010947727.6A CN114164825A (en) | 2020-09-10 | 2020-09-10 | High-pressure rotary jet grouting machine and application method thereof |
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| CN114164825A true CN114164825A (en) | 2022-03-11 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100894988B1 (en) * | 2008-05-30 | 2009-04-30 | 피에스엔지니어링(주) | Reinforcing method using helical-pile for direct-boring grouting |
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