CN114941503A - High-pressure jet grouting pile drill bit - Google Patents
High-pressure jet grouting pile drill bit Download PDFInfo
- Publication number
- CN114941503A CN114941503A CN202210740715.5A CN202210740715A CN114941503A CN 114941503 A CN114941503 A CN 114941503A CN 202210740715 A CN202210740715 A CN 202210740715A CN 114941503 A CN114941503 A CN 114941503A
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- pipe
- drill bit
- jet grouting
- pressure jet
- grouting pile
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- 238000005507 spraying Methods 0.000 claims abstract description 48
- 239000002002 slurry Substances 0.000 claims abstract description 38
- 239000002689 soil Substances 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 12
- 239000004568 cement Substances 0.000 claims description 56
- 230000005540 biological transmission Effects 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 239000007921 spray Substances 0.000 claims description 9
- 239000011268 mixed slurry Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 12
- 238000003756 stirring Methods 0.000 abstract description 8
- 238000005086 pumping Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 15
- 239000010410 layer Substances 0.000 description 7
- 230000008602 contraction Effects 0.000 description 5
- 239000011440 grout Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000004566 building material Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000004537 pulping Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
-
- 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
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Paleontology (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a high-pressure jet grouting pile drill bit which comprises an upper section of rod body, a drill blade base and a lower section of rod body, wherein the stress state and the rotation mode of the three parts are changed in the drilling process of the drill bit to cause the relative positions of the upper section of rod body, the drill blade base and the lower section of rod body to change, so that the drill bit can work by two high-pressure jet grouting liquids and two changed structures, and the function of a pre-drilling diameter-increasing high-pressure jet grouting pile drill bit for pumping soil is realized. According to the technical scheme, high-pressure rotary spraying is matched with a drill blade to stir and prepare slurry according to designed parameters, a quantitative pump sucks soil to form a preformed hole, high-pressure diameter-increasing rotary spraying is carried out, and slurry is prepared layer by layer to form the pile.
Description
Technical Field
The invention relates to the technical field of construction of a jet grouting pile, in particular to a preformed hole diameter-increasing high-pressure jet grouting pile drill bit for pumping soil removal.
Background
The high-pressure rotary jet grouting pile is characterized in that high-pressure cement slurry is sprayed into a soil layer through a rotary nozzle to achieve the purpose of cutting a soil body and a mixed soil body, and finally a continuously lapped cement reinforcing body is formed. The rotary jet drill bit is a key component of high-pressure rotary jet pile construction equipment.
A rotary jet drill bit used for high-pressure rotary jet pile construction at the present stage is generally of a rod-shaped cavity structure, a conical tip is arranged at the front end of the drill bit, one or more nozzles are arranged at the neck of the drill bit, high-pressure cement slurry is continuously sprayed from the nozzles to cut surrounding soil bodies and discharge redundant soil bodies in an overflow mode along with the rotation of the drill bit, sufficient cement slurry needs to be continuously sprayed in the construction process, and the cement content in the pile body is gradually increased along with the fact that more and more soil bodies are mixed in the middle of the cement slurry and discharged from an orifice in the overflow mode. With this slow and inefficient replacement process, a large amount of cement-soil mixed slurry is discharged from the orifice, a large amount of construction solid waste is formed at the construction site, a large amount of cement and water are wasted, and finally, the overflowed cement-soil mixed slurry is solidified to form construction waste which is difficult to dispose. And because a large amount of cement is discharged from the orifice and discarded, the cement content of the pile body cannot be accurately measured, so that the quality of the high-pressure jet grouting pile is difficult to control. In addition, because the state of a nozzle on the drill bit can not be adjusted, high-pressure cement slurry can be repeatedly and rotatably sprayed in a fixed mode to cut surrounding soil bodies, the influence range of the high-pressure cement slurry jet is limited to the periphery of the drill bit, and the effect of constructing the large-diameter rotary spraying pile is often unsatisfactory.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art and provide a preformed hole diameter-increasing high-pressure rotary jet grouting pile drill bit for pumping soil, wherein firstly, in the descending process of the drill bit, high-pressure water rotary jet is utilized to fully stir soil and water to be replaced into slurry in a drilling blade stirring and pulping mode; a pumping mode is adopted, the drilling fluid is removed through an opening arranged on a drill bit, and a cavity is formed around the drill rod until the design depth is reached; and then the position of the cement paste nozzle is adjusted through the rotary spraying pipe capable of controlling swinging, so that the nozzle spans the cavity area and is close to the soil body to spray high-pressure cement paste jet, and the soil body cutting by the high-pressure cement paste is directly, quickly and efficiently completed. And when the drill bit finishes the rotary spraying from the bottom of the hole upwards layer by layer, the construction of the whole high-pressure rotary spraying pile is finished. The method replaces the existing slow and inefficient mixing and replacing process, can avoid the waste of building materials such as cement, water and the like, can accurately measure the cement content of the pile body, enlarges the influence range of the nozzle for spraying high-pressure cement paste, expands the diameter of the rotary spraying pile, and can accurately control the cement content of the rotary spraying pile body.
The invention is realized by the following technical scheme:
firstly, a rotary spraying pipe capable of controlling swing shrinks in a cylinder groove of a lower section rod body, water is used as a medium, and soil and water to be replaced are prepared into slurry in a drilling blade stirring and pulping mode through a water nozzle on the surface of a drill bit rotary pipe in the downward process of a drill bit by utilizing high-pressure water rotary spraying. When the high-pressure jet grouting pile drill bit drills to the designed depth, a cavity with a smaller aperture and removed soil is formed.
Then, the drill bit is pulled, the lower section rod body of the drill bit is separated from the upper section rod body of the drill bit due to gravity, the rotary spraying pipe is synchronously unfolded, the medium channel is switched, the annular channel between the first pipe and the second pipe is always communicated to the cement paste nozzle at the tip of the rotary spraying pipe, high-pressure cement paste is used as a medium, and the cement paste nozzle at the end part of the rotary spraying pipe is passed through. From bottom to top, the pile diameter is increased by high-pressure water jet grouting, and the slurry is formed layer by jet grouting.
According to the technical scheme, the soil removal amount, the diameter of the pre-formed hole, the diameter of the pile body and the cement spraying amount which need to be replaced can be accurately controlled according to designed parameters, slurry is not overflowed in the construction process, building materials are saved, the using amount of cement is the cement content of the pile body, and the construction process is clean, environment-friendly, efficient, scientific and reliable.
In order to achieve the technical scheme, the high-pressure jet grouting pile drill bit is divided into an upper section rod body, a drill blade base and a lower section rod body. The upper section rod body and the rod-shaped cavity structure are of standard composite double-pipe interfaces, the interfaces are communicated with a double pipe and a double pipe in the upper section rod body, and the lower ends of the double pipe and the double pipe are connected with a diversion pipe throat. A heavy pipe passes through the throat and is communicated with two symmetrically-arranged openings on the outer surface of the upper rod body. The double pipe is sleeved outside the double pipe and passes through the pipe throat, and the double pipe is communicated with an upper port in the force transmission column at the lower end of the upper-section rod body. The force transmission column at the lower end of the upper section rod body is of a rectangular hollow structure, and two slide rail grooves are formed in the lower end of the force transmission column.
The lower section rod body is of a rod-shaped cavity structure and consists of a hollow cylinder body at the upper part, a cone at the lower part and a rotary spray pipe. The barrel is the tubular structure of inside square excircle, and the both sides of symmetry are provided with the barrel groove, and the barrel inslot is for holding the whirl shower of contraction state, and the inner chamber is for the rectangle structure with biography power post external diameter assorted, link up to the cone downwards. The cone is a conical cavity structure, a lower port is arranged in the cone, and the cone is connected with the upper port through a hose. The lower port is connected with the cavity channel in the cone and communicated with the fixed pipe. The fixed tubes are divided into two branches, fixed on the upper part of the cone and positioned at the two symmetrical sides of the outer part of the cylinder. The pipe wall is provided with an opening, and the tail end is closed. The rotary spraying pipe consists of a cement slurry nozzle, a cement slurry spraying pipe, a pipe sleeve, a rotary pipe and a rotating handle, is symmetrically arranged in the barrel grooves on two sides of the barrel, is arranged outside the fixed pipe through the rotary pipe sleeve, is vertically arranged in the barrel groove when the cement slurry spraying pipe is in a shrinkage state, and can be in a straight state after being swung open by 90 degrees. The pipe wall of each rotating pipe is provided with two openings, one is a water nozzle, the other is a cement hole, the position is 90 degrees, and the water-spraying cement hole is connected with the cement-slurry-spraying pipe and communicated with the cement-slurry nozzle. The rotating pipe is sleeved outside the fixed pipe, the direction handle is fixed outside the rotating pipe, and the tail end of the direction handle is hung in the sliding rail groove and can slide.
The drill blade base is annular, four drill blades are arranged on the drill blade base, a pair of upper edge bulges are arranged on the upper edge, a pair of lower edge bulges are arranged on the lower edge, and a hanging lug is arranged on the upper edge bulges. When the high-pressure jet grouting pile drill bit drills downwards, the drill rod rotates clockwise, the drill blade enables the drill blade base and the drill rod to generate a rotation speed difference due to resistance generated by stirring, the upper edge of the drill blade base protrudes and can rotate to a locking position, when the upper edge protrudes and is tightly locked and limited by the upper section of rod body, the hanging lug of the drill blade base can hang the upper edge of the barrel body to protrude, so that the upper section of rod body and the lower section of rod body are in a locking state, and the lower edge of the drill blade base protrudes and covers the tip part of the guniting pipe in a contraction state in the barrel groove of the lower section of rod body, so that the jet grouting pipe in the contraction state in a high-speed rotation state is prevented from being thrown out of the barrel groove due to centrifugal force when the high-pressure jet grouting pile drill bit drills downwards; if the drill rod rotates anticlockwise, the drill blade enables the drill blade base and the drill rod to generate rotation speed difference due to resistance generated by stirring, the protrusion of the upper edge of the drill blade base can rotate to an unlocking position, when the protrusion of the upper edge is close to the unlocking limit of the upper section rod body, the hanging lug on the lower edge of the drill blade base can be separated from the protrusion of the upper edge of the barrel body of the lower section rod body, the L-shaped hanging lug on the lower edge of the drill blade base can rotate to deviate from the groove of the barrel body, the rotary spraying pipe in the contraction state is completely exposed, and the drill bit is in the unlocking state. Only in the unlocking state, the rotary jet pipe can be unfolded by stopping rotation and lifting the drill bit. If the rotary jet pipe is not required to be unfolded, the drill pipe can be rotated clockwise to continue drilling.
Furthermore, the high-pressure jet grouting pile drill bit is provided with a rotary jet pipe capable of controlling swing, namely, the rotary pipe sleeved on the outer side of the fixed pipe is controlled to rotate by controlling the rotating handle through the slide rail groove at the lower end of the force transmission column. The rotation of the rotary pipe can enable the opening of the fixed pipe to be switched between the water nozzle and the mud spraying hole on the rotary pipe, so that different spraying paths of the high-pressure water and the high-pressure mud are changed, and the high-pressure water and the high-pressure mud are sprayed by the corresponding nozzles. Specifically, when the rotary spraying pipe is in a contracted state and is positioned in the cylinder groove, the water nozzle on the rotary pipe is just coincided and communicated with the opening of the fixed pipe, and the cement slurry hole is in a closed state at the moment. High-pressure water formed by pressurization of a ground plunger pump sequentially passes through a pipe throat, an upper port, a hose, a lower port, a cavity and a fixed pipe through an annular passage between a double pipe and a double pipe, finally enters a rotary pipe through an opening and is sprayed from a water nozzle; when the rotating pipe rotates outwards by 90 degrees, the rotary spraying pipe synchronously rotates outwards by 90 degrees to be in an extending state, the cement paste hole in the rotating pipe is just coincided with the hole of the fixed pipe to be communicated, and the water nozzle is in a closed state at the moment. The ground plunger pump changes the rotary spraying medium, and the pressurized high-pressure cement slurry is sprayed from the cement slurry nozzle.
Furthermore, the stress states of the upper and lower sections of rod bodies of the high-pressure jet grouting pile drill bit are different in two working states of downward drilling and upward drilling, and the mutual position is changed. When drilling downwards, the high-pressure jet grouting pile drill bears pressure, the upper section rod body and the lower section rod body are tightly attached together, the lower end of the force transmission column conducts the pressure to a soil layer through the cone inner cavity attached to the force transmission column, the rotating handle is at a low position under the restraint of the sliding rail groove, at the moment, the sliding rail groove, the rotating handle and the rotating pipe which are combined together are all at an initial position, and the jet grouting pipe is in a contraction state and is vertically arranged in the groove. Under the state, high-pressure water discharged by a plunger pump is a rotary spraying medium and is sprayed by a water nozzle on a rotary pipe, so that soil around a drill rod is stirred by the rotation of the drill blades to form slurry, and the slurry is pumped away by a slurry pump arranged on the ground through an opening communicated with a heavy pipe. When the high-pressure jet grouting pile is drilled upwards, the high-pressure jet grouting pile drill bears the tensile force, and the lower section rod body is separated from the upper section rod body due to the gravity. And the rotating handle is hung in a slide rail groove at the lower end of the force transmission column, the rotating handle is restrained by the slide rail groove and rotates 90 degrees from the lower part to the upper part, at the moment, the rotating handle drives the rotating pipe to rotate 90 degrees, the guniting pipes connected with the rotating pipe synchronously swing outwards, finally, the whole guniting pipe rotates 90 degrees along the fixed pipe and stops, the two guniting pipes are unfolded and are in a straight state, and a grout nozzle at the tip of the rotating guniting pipe swings to the edge position of a formed hole. High-pressure cement slurry discharged from the plunger pump is a jet-grouting medium, is jetted from a cement slurry nozzle, and is further expanded and cut to the annular soil body on the outer side to form cement soil body mixed slurry to fill all gaps, so that a large-diameter cement soil reinforced pile body is formed.
The high-pressure jet grouting pile drill bit has the advantages that the upper section rod body and the lower section rod body are kept to rotate synchronously all the time in the jet grouting process because the force transmission column and the inner cavity of the cylinder body are similar to rectangles, and the force transmission column and the inner cavity of the cylinder body are poor in matched size and have high rigidity, so that the force transmission column and the cylinder body can be sleeved together and can only slide up and down and rotate synchronously.
Furthermore, the pressure step is arranged between the force transmission column and the inner cavity of the cylinder body, so that the pressing surface of the force transmission column can be tightly attached to the pressed surface of the cylinder body, and the effective transmission of pressure and selective grabbing torque is guaranteed. In addition, the inner cavity of the force transmission column is provided with a spring ring which is embedded in the two pins which are bilaterally symmetrical. The corresponding position of the cylinder body is provided with a bolt hole. When the upper rod body and the lower rod body of the high-pressure jet grouting pile drill bit are separated from each other, the force transmission column sleeved in the barrel body slides upwards, when the bolt on the force transmission column is aligned with the bolt hole of the barrel body, the two bolts can be instantly inserted into the bolt hole of the barrel body under the elastic action of the spring ring, so that the force transmission column of the drill bit in an unfolded state and the barrel body are locked together again, and the relative position of the force transmission column and the barrel body is fixed. Meanwhile, the rotary handle rotates 90 degrees, so that the rotary spraying pipe contracted in the cylinder groove rotates 90 degrees, and the switching of a high-pressure rotary spraying slurry path (from a water path to a cement slurry path) is completed.
Furthermore, the rotary spraying pipe is of a blade-shaped structure, the middle of the rotary spraying pipe is provided with a cement slurry spraying pipe, the tip of the rotary spraying pipe is provided with a cement slurry spraying nozzle, and the fixed end of the rotary spraying pipe is provided with a rotary pipe and a fixed pipe which are sleeved together. The peripheral pipe sleeve improves the rigidity and the stability of the guniting pipe during rotation and protects the guniting pipe and a cement paste nozzle. When the spray pipe is unfolded, the same rotating radius of the guniting pipe and the drill blade is ensured, so that the lengths of the guniting pipe and the drill blade must be matched with the cutting range of the high-pressure jet flow of the rotary spray.
Furthermore, the materials of the drilling blade, the spray pipe and the pipe sleeve can be changed into high-elasticity materials, so that the effectiveness of construction on a soil layer mixed with rock blocks can be further improved. If the accelerating agent is required to be added, the accelerating agent can be added through a heavy pipe when the high-pressure jet grouting pile drill bit moves upwards, and the accelerating agent is mixed into the slurrying mixed liquid of cement and soil from the open hole, so that the solidification period of the jet grouting pile is shortened.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the high-pressure jet grouting pile drill bit disclosed by the invention can accurately control the soil removal amount to be replaced, the diameter of a pre-formed hole, the diameter of a pile body and the cement injection amount according to designed parameters no matter in the construction of a high-pressure jet grouting pile with large, medium and small diameters, and does not generate slurry overflow in the construction process, so that the building material is saved, and the construction process is clean, environment-friendly, efficient, scientific, reliable and rapid;
2. the high-pressure jet grouting pile drill bit provided by the invention has the advantages that the construction level of the high-pressure jet grouting pile at the present stage is obviously improved, and the development space of the high-pressure jet grouting pile is further expanded.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic structural diagram of an initial state of the present invention;
FIG. 2 is a schematic view of the base structure of the drill blade of the present invention;
FIG. 3 is a schematic view of the expanded state of the lower section of the rod body of the present invention;
FIG. 4 is a side view of the contracted state of the rotary spray pipe of the present invention;
FIG. 5 is a side view of the rotary spray pipe of the present invention in a deployed state;
FIG. 6 is a cross-sectional view of a lower section of the present invention;
FIG. 7 is a cross-sectional view of a vertebral body of the present invention;
reference numbers and corresponding part names in the drawings:
1-heavy pipe, 2-drilling blade base, 3-force transmission column, 4-cylinder, 5-rotary spraying pipe, 6-cone, 7-double pipe, 8-pipe throat, 9-upper port, 10-opening, 11-hose, 12-locking limit, 13-unlocking limit, 20-drilling blade, 21-upper edge projection, 22-lower edge projection, 23-hanging ear, 31-spring ring, 32-force transmission column outer wall, 33-bolt, 34-force transmission column inner wall, 35-slide rail groove, 41-bolt hole, 42-cylinder inner wall, 43-cylinder outer wall, 44-cylinder groove, 45-upper edge outer projection, 51-water nozzle, 52-rotary handle, 53-grout spraying pipe, 54-rotary pipe and 55-grout nozzle, 56-pipe sleeve, 57-cement hole, 61-lower port, 62-fixed pipe and 63-cavity channel.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, and the exemplary embodiments and descriptions thereof are only for explaining the present invention and are not to be construed as limiting the present invention.
Example 1
As shown in fig. 1, which is a structural schematic diagram of an initial state of the present invention, a heavy pipe 1 is sleeved inside a double pipe 7, the lower end of the heavy pipe 1 is communicated with an opening 10 through a pipe throat 8, the lower end of the double pipe 7 is communicated with an upper port 9 through the pipe throat 8, the opening 10 is located outside a drill, the lower end is a drill base 2, 4 drill blades 20 are arranged on the drill base 2, a rotary spray pipe 5 is in an upright state, and a water nozzle 51 on a rotary pipe 54 is exactly coincided with a pipe wall opening on a fixed pipe 62. The high-pressure water enters the annular passage between the double-layer pipe 7 and the single-layer pipe 1, sequentially passes through the pipe throat 8, the upper port 9, the lower port 61, the cavity 63 and the fixed pipe 62, finally enters the rotary pipe 54 through the pipe wall hole on the fixed pipe 62, and is laterally sprayed from the water nozzle 51. The soil around the drill rod is formed into a mixed slurry of water and mud by the action of the rotating jet of the water nozzle 51, and after the rotating agitation of the blade 20, holes filled with mud are formed around the drill bit, and the mud can enter the throat 8 through the opening 10 and then be pumped to the ground through the heavy pipe 1 by means of a pump, so that a cavity is formed around the drill bit.
As shown in fig. 2, which is a schematic structural diagram of the base of the drill blade of the present invention, when the drill bit starts to rotate clockwise, the resistance is generated due to the stirring action of the drill blade 20, so that the base 2 of the drill blade starts to rotate synchronously with the drill bit when the upper edge protrusion 21 abuts against the upper rod locking limit 12. At the moment, the lower edge protrusion 22 rotates to the outer edge of the cylinder groove 44, and the hanging lug 23 on the lower edge protrusion 22 clamps the upper edge outer protrusion 45, so that the upper and lower end rod bodies of the drill bit are locked. When the drill bit starts to rotate in the anticlockwise direction, resistance is generated due to the stirring action of the drill blade 20, so that the drill blade base 2 and the drill bit start to rotate synchronously when the upper edge bulge 21 abuts against the upper section rod body unlocking limit 13. At the moment, the lower edge projection 22 is moved away from the outer edge area of the cylinder groove 44, and the hanging lugs 23 on the lower edge projection 22 are separated from the upper edge outer projections 45, so that the upper and lower end rod bodies of the drill bit are unlocked.
As shown in fig. 3, which is a schematic structural diagram of the unfolded state of the lower section rod body of the present invention, after the upper and lower section rod bodies of the drill bit are unlocked, if the drill bit drills to a designed depth, the rotation and the water spraying are stopped, the drill bit is pulled to make the high pressure jet grouting pile drill bit bear the tensile force, and the lower section rod body is separated from the upper section rod body due to the gravity. When the upper rod body and the lower rod body of the high-pressure jet grouting pile drill bit are separated from each other, when the bolts 33 are aligned with the bolt holes 41, the two bolts 33 can be instantly inserted into the bolt holes 41 under the elastic force of the spring ring 31, so that the drill bit in an unfolded state is locked together again. At this time, the rotating handle 52 drives the rotating pipe 54 to rotate 90 degrees on the fixed pipe 62, the rotary spraying pipes 5 connected with the rotating pipe are synchronously swung outwards, finally, the whole rotary spraying pipe 5 rotates 90 degrees along the fixed pipe 62 and stops, the two rotary spraying pipes 5 are unfolded at the same time and are in a straight state, and the cement paste nozzle 55 at the tip of the rotary spraying pipe 5 swings to the edge position of the formed hole. The cement slurry hole on the rotating pipe 54 is just coincided and communicated with the opening of the fixed pipe 62, high-pressure cement slurry passes through the lower port 61, the cavity 63, the fixed pipe 62 and the rotating pipe 54 and is finally sprayed through the cement slurry nozzle 55 to further expand and cut the annular soil body on the outer side, and cement soil body mixed slurry is formed to fill all gaps, so that the cement soil body reinforced pile body is formed.
As shown in FIG. 4, the hose 11 is in a spiral state in the power transmission column 3 in a side view of the contracted state of the rotary jet nozzle of the present invention, and communicates the upper port 9 with the lower port 61. The swirl tube 5 is located in the barrel groove 44.
As shown in FIG. 5, the hose 11 is in a stretched condition inside the power transmission column 3 in a side view of the expanded condition of the jet grouting pipe of the present invention, and communicates the upper port 9 with the lower port 61. And the rotating handle 52 is hung on the slide rail groove 35, the rotating handle 52 is restrained by the slide rail groove 35 and rotates 90 degrees from the lower part to the upper part, at the moment, the rotating handle 52 drives the grout spraying pipe 53 to rotate 90 degrees and is in a straight state, so that the grout spraying nozzle 55 swings to the edge position of the formed hole. The rotary spraying pipe 5 rotates outwards by 90 degrees and is in an extending state, and the cement slurry hole 57 is just coincided with and communicated with the opening on the wall of the fixed pipe. High pressure cement slurry passes through the upper port 9, then sequentially through the hose 11, the lower port 61, the channel 63, and finally through the cement slurry holes 57, and is ejected from the cement slurry nozzle 55.
As shown in fig. 6, which is a cross-sectional view of the lower rod body of the present invention, the cylinder 4 is symmetrically provided with two cylinder grooves 44, the cylinder 4 is in a cylindrical structure with an outer circle and an inner square, and the force transmission column 3 is in a rectangular tubular structure. The inner wall 42 of the cylinder body is attached to the outer wall 32 of the force transmission column 3, and the cylinder body 4 is sleeved with the force transmission column 3 and keeps rotating in the same direction, and the cylinder body and the force transmission column can slide up and down.
Referring to fig. 7, which is a cross-sectional view of the cone of the present invention, the slide groove 35 is located at the extreme end of the force transmission column 3, and when the drill bit is in a contracted state, the stem 52 is held down by the slide groove 35, and at this time, the slide groove 35 and the stem 52 connected thereto, the rotating tube 54 and the fixed tube 62, which are sleeved together, are both in the initial position. At this time, the high-pressure water pumped out by the plunger pump is a jet medium, passes through the lower port 61, the channel 63, and the fixed pipe 62 in sequence, and is jetted through the water nozzle 51 on the rotary pipe 54.
The above-mentioned embodiments are intended to illustrate the objects and technical solutions of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a high pressure jet grouting pile drill bit which characterized in that: including the upper segment body of rod, bore leaf base and hypomere body of rod, bore the leaf base and set up between the upper segment body of rod and hypomere body of rod, the upper segment body of rod cup joints as an organic whole through dowel post and hypomere body of rod.
2. A high pressure jet grouting pile drill bit according to claim 1, characterized in that: the upper section rod body comprises an inner cavity structure and a force transmission column at the lower end.
3. The high pressure jet grouting pile drill bit according to claim 2, wherein: the cavity structure comprises a heavy pipe and a double pipe which are sleeved together below a double pipe interface, the lower ends of the heavy pipe and the double pipe are connected with a pipe throat, the pipe throat penetrates through the heavy pipe and an opening, meanwhile, an annular channel between the heavy pipe and the double pipe penetrates through the pipe throat to the upper end, the force transmission column is of a rectangular tubular structure and is inserted into the lower section of a rod body, and the lower end of the force transmission column is provided with a slide rail groove.
4. A high pressure jet grouting pile drill bit according to claim 1, characterized in that: the drill blade base is of an annular structure and comprises more than one pair of drill blades, an upper edge bulge and a lower edge bulge, and the plurality of pairs of drill blades synchronously rotate in the process that the drill blade base rotates along with the upper section of rod body, so that water-soil mixed slurry around the drill rod can be stirred.
5. The high-pressure jet grouting pile drill bit according to claim 4, characterized in that: the drill blade base slides to a locking position, the hanging lug arranged on the lower edge protrusion can hang the upper edge protrusion arranged on the lower barrel body, so that the upper section rod and the lower section rod body are locked together, the drill blade base slides to an unlocking position, the hanging lug can be separated from the upper edge protrusion of the barrel body of the lower section rod body, and the upper section rod and the lower section rod body can be pulled apart.
6. A high pressure jet grouting pile drill bit according to claim 1, characterized in that: the lower section rod body comprises a cylinder body, a cone and a rotary spraying pipe, a cylinder body groove is formed in the outer side of the cylinder body and used for accommodating the rotary spraying pipe, the cylinder body is sleeved with the force transmission column and keeps rotating in the same direction, the cylinder body and the drill leaf base can slide up and down, the cylinder body and the drill leaf base are sleeved together and can rotate mutually and also slide up and down mutually.
7. The high-pressure jet grouting pile drill bit according to claim 6, characterized in that: the bolt hole that sets up on the barrel and the bolt that sets up on the power transmission post, the position coincidence is right, and under the spring coil elasticity effect, the bolt can insert the bolt hole in the twinkling of an eye, makes power transmission post and barrel locking together.
8. The high-pressure jet grouting pile drill bit according to claim 6, characterized in that: the cone is fixed at the lower end of the cylinder body, is positioned at the lower section of the rod body and comprises a lower port, the lower port is connected with a cavity, and the cavity is connected with a fixed pipe.
9. A high pressure jet grouting pile drill bit according to claim 8, characterized in that: the rotating pipe sleeve is arranged on the outer side of the fixed pipe and can rotate around the fixed pipe, the wall of the rotating pipe is provided with a water nozzle and a cement slurry hole, the water nozzle and the cement slurry hole are 90 degrees in position, the rotating handle of the rotating spraying pipe is hung in the sliding rail groove and can slide in the sliding rail groove along with the position change of the rotating handle, and meanwhile, the rotating handle rotates.
10. A high pressure jet grouting pile drill bit according to claim 9, characterized in that: the rotating handle slides in the sliding rail groove, and simultaneously rotates, so that the rotating pipe synchronously rotates to rotate around the fixed pipe, and the rotating spray pipe extends from the barrel groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210740715.5A CN114941503A (en) | 2022-06-28 | 2022-06-28 | High-pressure jet grouting pile drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210740715.5A CN114941503A (en) | 2022-06-28 | 2022-06-28 | High-pressure jet grouting pile drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114941503A true CN114941503A (en) | 2022-08-26 |
Family
ID=82910819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210740715.5A Pending CN114941503A (en) | 2022-06-28 | 2022-06-28 | High-pressure jet grouting pile drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114941503A (en) |
-
2022
- 2022-06-28 CN CN202210740715.5A patent/CN114941503A/en active Pending
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