CN109372421B - Multi-power composite drilling tool, preparation method and pile - Google Patents
Multi-power composite drilling tool, preparation method and pile Download PDFInfo
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- CN109372421B CN109372421B CN201811186080.9A CN201811186080A CN109372421B CN 109372421 B CN109372421 B CN 109372421B CN 201811186080 A CN201811186080 A CN 201811186080A CN 109372421 B CN109372421 B CN 109372421B
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- 238000005553 drilling Methods 0.000 title claims abstract description 189
- 239000002131 composite material Substances 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000004567 concrete Substances 0.000 claims abstract description 27
- 238000010276 construction Methods 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 239000002689 soil Substances 0.000 claims description 82
- 238000007599 discharging Methods 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 18
- 150000001875 compounds Chemical class 0.000 claims description 2
- 230000008569 process Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000002310 elbow joint Anatomy 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- E21B3/00—Rotary drilling
- E21B3/02—Surface drives for rotary drilling
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/22—Rods or pipes with helical structure
-
- 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to the technical field of civil engineering, in particular to a multi-power composite drilling tool, a preparation method and a pile. The multi-power composite drilling tool comprises a lower power drilling tool, a middle power drilling tool and an upper power drilling tool which are coaxially sleeved in sequence; the lower power drilling tool, the middle power drilling tool and the upper power drilling tool are respectively provided with a power mechanism, and the power mechanisms can independently drive the corresponding drilling tools to rotate. When the multi-power composite drilling tool is used for construction, each drilling tool is converted into an active driving mode from a traditional linkage mode, so that hole forming and concrete pressing and grouting pile forming can be completed at one time, the automation degree is high, and the improvement of work efficiency is realized; the diameter of the pile body is changed, and the construction method is reasonable, so that the bearing capacity of a single pile is further improved, and the cost is reduced; the above comprehensive factors shorten the construction period.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to a multi-power composite drilling tool, a preparation method and a pile.
Background
In the innovated open tide, the construction industry has rapidly developed, the design and construction requirements of the construction engineering on foundation bases are higher and higher, the concrete piles, reinforced concrete pile foundations and composite foundations are widely applied to projects such as high-rise buildings, bridges, ports, railways, highways, airports, water conservancy and hydropower facilities and the like, and in order to enable the concrete piles and reinforced concrete piles to meet the design requirements of bending resistance, shearing resistance, bearing capacity, earthquake resistance and the like, people continuously improve the shapes of the concrete piles and reinforced concrete piles so as to further meet the design requirements, save raw material consumption, improve engineering quality and shorten construction progress. The vertical and horizontal section of the traditional pile built by the existing equipment and technology is a cylindrical or square column pile which does not change along with the length of the pile, and the bearing capacity of the pile is mainly composed of the friction resistance of the pile side and the end resistance of the pile end. The existing equipment has single function, low automation degree and cannot treat foundation soil according to local conditions, so that certain cost is wasted, and the single pile bearing capacity exerting effect is affected.
The technology of the soil extrusion and discharge composite drilling tool is cited in the patent: the utility model is as follows: 201820124401.1, name of utility model: a composite drilling tool for extruding and discharging soil and a CFG extruding and discharging soil pile. (inventive patent is in the examination stage)
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a multi-power composite drilling tool, a preparation method and a pile, which are used for solving the technical problems of low equipment automation degree, single construction method, single pile type, poor adaptability and low single pile bearing capacity in the prior art.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
In a first aspect, the present invention provides a multi-powered compound drilling tool comprising: a lower power drilling tool, a middle power drilling tool and an upper power drilling tool which are coaxially sleeved in sequence; the lower power drilling tool, the middle power drilling tool and the upper power drilling tool are respectively provided with a power mechanism, and the power mechanisms can independently drive the corresponding drilling tools to rotate.
As a further aspect, the lower power drill includes: a lower power head and an outer sleeve drilling tool; the lower power head is arranged at the upper end of the outer sleeve drilling tool and used for driving the outer sleeve drilling tool to rotate.
As a further aspect, the lower power drill further includes: a lower soil discharging groove; the lower soil discharging groove is arranged at the upper end of the lower power head.
As a further technical solution, the medium power drilling tool includes: the middle power head, the middle sleeve drilling tool and the middle lifting device; the middle power head is arranged at the upper end of the middle sleeve drilling tool and used for driving the middle sleeve drilling tool to rotate; the middle lifting device is arranged at the lower end of the middle power head and is used for driving the lower power drilling tool to lift.
As a further technical solution, the medium power drilling tool further includes: the middle soil discharging groove and the middle limiting device are arranged at the upper end of the middle power head; the middle limiting device is arranged at the lower end of the middle power head.
As a further aspect, the upper power drill includes: the device comprises an upper power head, a central drilling tool and an upper lifting device; the upper power head is arranged at the upper end of the central drilling tool and is used for driving the central drilling tool to rotate; the upper lifting device is arranged at the lower end of the upper power head and is used for driving the middle power drilling tool to lift.
As a further technical solution, the upper power drill further includes: an upper limit device; the upper limiting device is arranged at the lower end of the upper power head.
As a further technical scheme, the method further comprises the following steps: and a pressurizing device provided to any one of the upper power drill and the middle power drill.
In a second aspect, the present invention also provides a swage stake prepared according to the multi-power composite drilling tool, comprising: a main body pile body;
At least two inverted cone step-shaped bodies are arranged on the pile body of the main body;
the angle range of the inclined plane extension line of the inverted cone disk of the inverted cone step type body and the central axis of the pile body of the main body is as follows: 5-90 deg.
In a third aspect, the present invention also provides a method of preparing a swage stake according to the multi-powered composite drilling tool, comprising: according to the requirements of the stratum on the construction method, the upper power drilling tool, the middle power drilling tool and the lower power drilling tool sequentially drill to the respective designed depths, so that a plurality of back taper step type drilling holes can be formed; starting a concrete pump, pressing and pouring concrete, lifting an upper power drilling tool, a middle power drilling tool and a lower power drilling tool in sequence while pressing and pouring concrete, and lifting the bottom ends of the power drilling tools synchronously after the bottom ends are flush in sequence until the elevation of an orifice is mentioned, and simultaneously, pressing and pouring concrete into piles to the designed elevation, thereby realizing the completion of hole forming and concrete pressing and pouring into piles at one time.
By adopting the technical scheme, the invention has the following beneficial effects:
The invention provides a multi-power composite drilling tool, which comprises a lower power drilling tool, a middle power drilling tool and an upper power drilling tool, wherein the lower power drilling tool, the middle power drilling tool and the upper power drilling tool are respectively provided with a power mechanism; the adaptability is strong, and the popularization and the application are facilitated.
The invention provides a pile prepared according to a multi-power composite drilling tool, wherein the bearing capacity of the pile comprises pile side friction and pile end bearing capacity of a traditional pile body, and the inclined surface of a reverse cone disc of a reverse cone step-shaped body can decompose part of vertical downward force into tangential force and normal force of a conical surface, and the surrounding soil of the pile forms a passive compression stress state and a squeezing and expanding state, so that the pile surrounding friction is increased, the bearing capacity of a single pile is improved, and the settlement amount can be reduced. The pile shallow inverted cone section bearing capacity can be calculated by using a shallow foundation bearing capacity formula of a Terzaghi. By the composite drilling tool, overlapping and combined construction can be completed, hole forming and concrete pressing and grouting pile forming can be completed at one time, so that the work efficiency is improved, the bearing capacity of a single pile is further improved, the cost is reduced, and the construction period is shortened.
The invention provides a preparation method of a multi-power composite drilling tool, which sequentially drills an upper power drilling tool, a middle power drilling tool and a lower power drilling tool to respective designed depths according to the requirements of stratum on a construction method, so that a plurality of reverse taper step type drilling holes can be formed; starting a concrete pump, pressing and pouring concrete, sequentially lifting an upper power drilling tool, a middle power drilling tool and a lower power drilling tool while pressing and pouring concrete, and synchronously lifting the bottom ends of the power drilling tools after being sequentially leveled until the elevation of an orifice is mentioned, and simultaneously pressing and pouring concrete into piles to the designed elevation, so that the hole forming and concrete pressing and pouring into piles are completed at one time, and the pile with the structure and the function is formed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will briefly explain the drawings needed in the embodiments or the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an initial state of a multi-power composite drilling tool according to an embodiment of the present invention;
FIG. 2 is a schematic view of a drilling state of a multi-power composite drilling tool according to an embodiment of the present invention;
FIG. 3 is a schematic view of an upper motor according to an embodiment of the present invention;
fig. 4 is a schematic front view of an upper power head according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a middle power drilling tool according to an embodiment of the present invention;
fig. 6 is a schematic front view of a middle power head according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a middle soil discharging groove according to an embodiment of the present invention;
FIG. 8 is a schematic view of a lower power drilling tool according to an embodiment of the present invention;
fig. 9 is a schematic front view of a lower power head according to an embodiment of the present invention;
fig. 10 to 14 are schematic views of construction steps of a drilling tool according to an embodiment of the present invention;
fig. 15 to 24 are schematic views of different types of piles according to the embodiment of the present invention.
Icon: 1-a power drilling tool; 2-a medium power drilling tool; 3-lower power drilling tool; 4-type piles; 5-concrete pump; 11-upper power head; 12-a central drilling tool; 13-upper lifting means; 14-an upper limit device; 15-a pressurizing device; 21-a medium power head; 22-middle sleeve drilling tool; 23-a middle lifting device; 24-a middle limiting device; 26-a middle soil discharge groove; 31-a lower power head; 32-an outer sleeve drilling tool; 36-a lower soil discharging groove; 41-main body pile body; 42-back taper step profile.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
Example 1
As shown in fig. 1 to 9, the present embodiment provides a multi-power composite drilling tool including: a lower power drilling tool 3, a middle power drilling tool 2 and an upper power drilling tool 1 which are coaxially sleeved in sequence (sleeved in sequence from outside to inside); the lower, middle and upper power drills 3, 2, 1 are each provided with a power mechanism capable of independently driving their respective drills to rotate. Therefore, each drilling tool is converted into an active driving mode by a passive linkage mode, so that the automatic drilling tool has high degree of automation and strong adaptability, and is beneficial to popularization and application.
Preferably, the lower power drill 3 includes: a lower power head 31 and an outer sleeve drill 32; the lower power head 31 is disposed at an upper end of the outer sleeve drilling tool 32, and is used for driving the outer sleeve drilling tool 32 to perform a rotation motion.
Further, the lower power drill 3 further includes: a lower dumping groove 36; the lower soil discharging groove 36 is provided at the upper end of the lower power head 31.
The specific form of the lower power head 31 is not limited, and may be a hydraulic driving device or an electric driving device. As for the structure of the lower power head 31, the housing of the lower power head 31 may have a hollow cylindrical shape having a soil discharge space therein communicating with the lower soil discharge groove 36. Specifically, the lower soil discharging groove 36 includes a soil discharging box and a soil guiding groove disposed at one side of the soil discharging box and inclined. The bottom of the soil discharging box can be communicated with the outer sleeve drilling tool 32 through the shell of the lower power head 31, namely, part of the rotary soil discharging of the middle sleeve drilling tool 22 is led out through the inner side of the outer sleeve drilling tool 32, the lower power head 31 and the lower soil discharging groove 36. The outer sleeve drill 32 discharges the earth directly to the aperture.
For the outer sleeve drilling tool 32, a third helical blade is arranged on the outer sleeve drilling tool 32, and the third helical blade is arranged on the outer wall of the outer sleeve drilling tool 32 along the axial direction of the outer sleeve drilling tool 32. The size and specific shape of the outer sleeve drilling tool 32 may be flexibly set as desired.
Preferably, the medium power drilling tool 2 includes: a middle power head 21, a middle sleeve drilling tool 22 and a middle lifting device 23; the middle power head 21 is arranged at the upper end of the middle sleeve drilling tool 22 and is used for driving the middle sleeve drilling tool 22 to rotate; the middle lifting device 23 is disposed at the lower end of the middle power head 21, and is used for driving the lower power drilling tool 3 to lift.
For the middle power head 21, the structure thereof may be referred to the description of the lower power head 31 described above.
There are various ways for the middle lifting device 23.
For example: the middle lifting device 23 comprises: a winch, which is provided at the lower end of the middle power head 21, and whose hauling rope is connected to the lower power drill 3 (preferably, the lower power head 31).
Also for example: the middle lifting device 23 comprises: a telescopic cylinder (oil cylinder) is provided at the lower end of the middle power head 21, and a telescopic rod of the telescopic cylinder is connected to the lower power drill 3 (preferably, the lower power head 31).
For the intermediate sleeve drilling tool 22, the intermediate sleeve drilling tool 22 is provided with second helical blades, which are arranged on the outer wall of the first sleeve drilling tool in the axial direction of the first sleeve drilling tool.
Preferably, the middle power drill 2 further comprises: a middle soil discharging groove 26 and a middle limiting device 24, wherein the middle soil discharging groove 26 is arranged at the upper end of the middle power head 21; the middle limiting device 24 is disposed at the lower end of the middle power head 21.
For the middle soil discharging groove 26, the middle soil discharging groove 26 comprises a soil discharging box and a soil guiding groove which is arranged at one side of the soil discharging box and is obliquely arranged. The bottom of the soil discharging box can be communicated with the middle sleeve drilling tool 22 through the shell of the middle power head 21, namely, part of the rotary soil discharging of the center drilling tool 12 is led out through the inner side of the middle sleeve drilling tool 22, the lower power head 21 and the middle soil discharging groove 26.
There are a variety of ways for the mid-stop 24. For example: the middle limiting device 24 can be a rigid connecting rod, and the length of the rigid connecting rod is flexibly set according to the actual situation. The length of the telescopic connecting rod can be adjusted randomly according to requirements.
It should be noted that the middle power drilling tool 2 may be composed of a plurality of stacked sleeves according to design requirements. When the middle power drilling tool 2 is sleeved by a plurality of overlapped parts, the structures are the same except that the diameters and the lengths of the sleeves are different.
Preferably, the upper power drill 1 includes: an upper power head 11, a center drilling tool 12 and an upper lifting device 13; the upper power head 11 is arranged at the upper end of the central drilling tool 12 and is used for driving the central drilling tool 12 to rotate; the upper lifting device 13 is disposed at the lower end of the upper power head 11, and is used for driving the middle power drilling tool 2 to lift.
For the upper power head 11, the structure and the form are basically similar to those of the power heads 21 and 31, a grouting (concrete) elbow joint is additionally arranged (one end of an elbow is communicated with a central drill central pipe, the other end of the elbow is connected with a concrete conveying high-pressure hose), a hanging point is further arranged at the top of the power head, the upper power head is connected with a main winch of a drilling machine through a steel wire rope, and no dumping groove is arranged.
There are various ways for the upper lifting means 13.
For example: the upper lifting device 13 comprises: a winch is provided at the lower end of the upper power head 11, and a hauling cable of the winch is connected to the middle power drill 2 (preferably, the middle power head 21).
Also for example: the upper lifting device 13 comprises: a telescopic cylinder (oil cylinder) is provided at the lower end of the upper power head 11, and a telescopic rod of the telescopic cylinder is connected to the middle power drill 2 (preferably, the middle power head 21).
Further, the upper power drill 1 further includes: an upper limit device 14; the upper limiting device 14 is disposed at the lower end of the upper power head 11.
There are a variety of ways for the upper stop device 14. For example: the upper spacing means 14 may be a rigid connecting rod. The length of the rigid connecting rod is flexibly set according to the actual situation. The length of the telescopic connecting rod can be adjusted randomly according to requirements.
In addition, the present embodiment further includes: and a pressurizing device 15, wherein the pressurizing device 15 is arranged on any one of the upper power drilling tool 1 and the middle power drilling tool 2.
Of course, the pressurizing device 15 may be flexibly set according to the dead weight of the power mechanism, the geological condition and the design requirement, preferably, the pressurizing device 15 may be a winch, the winch is arranged on the drilling platform, and the traction rope of the winch is connected with any one of the upper power drill 1 (the upper power head 11) and the middle power drill 2 (the middle power head 21) through a guiding wheel. The pressurizing device 15 may be a hydraulic cylinder, the cylinder barrel of the hydraulic cylinder is fixedly arranged at a proper position of the drilling tower, and the top end of the piston rod of the hydraulic cylinder is connected with any one of the upper power drilling tool 1 (the upper power head 11) and the middle power drilling tool 2 (the middle power head 21).
Example two
Fig. 10 to 14 show a method for preparing a pile 4 by using the multi-power composite drilling tool according to the second embodiment, which includes: according to the requirements of the stratum on the construction method, the upper power drilling tool 1, the middle power drilling tool 2 and the lower power drilling tool 3 are sequentially drilled to the respective designed depths; starting a concrete pump 5, starting to press and fill concrete, and sequentially lifting the upper power drilling tool 1, the middle power drilling tool 2 and the lower power drilling tool 3 while pressing and filling the concrete until the bottom ends of the power drilling tools are sequentially leveled, and synchronously lifting the elevation of an orifice, and simultaneously pressing and filling the concrete into piles to the designed elevation.
In soft foundation treatment of building structures, railways, highways and the like, foundation soil which needs to be treated is generally divided into soft and weak field soil (average shear wave velocity of soil layer is less than or equal to 140 m/s), medium soft field soil (average shear wave velocity of soil layer is less than or equal to 250 m/s) medium hard field soil (average shear wave velocity of soil layer is less than or equal to 250 m/s) and hard field soil (average shear wave velocity of soil layer is less than or equal to 500 m/s) from shallow to deep according to the change rule of equivalent shear wave velocity value.
For a diameter-variable pile:
For example: for the soil in the middle hard field (or the soil in the middle hard field in the vast majority) in the long range of the treatment pile, the soil discharging method is adopted, and the soil discharging hole is sequentially and respectively drilled by the center drilling tool 12, the middle sleeve drilling tool 22 and the outer sleeve drilling tool 32. Further, the pressurizing point of the process pressurizing device 15 is optimally arranged on the upper power head 11.
For example: for the soil in the treated pile length range, which is soft and medium soft field soil (or most of soft and medium soft field soil), the soil squeezing method is adopted, and the holes are respectively drilled by the central drilling tool 12, the middle sleeve drilling tool 22 and the outer sleeve drilling tool 32 in sequence. Further, the pressurizing point of the process pressurizing device 15 is optimally arranged on the upper power head 11. The first diameter-variable pile body hole forming method of the pile top can also adopt a soil discharging mode (mainly based on the compaction degree of the middle sleeve drilling tool 22 to the hole wall soil).
For example: the upper part of the stratum in the length range of the treated pile is soft-middle soft site soil, the lower part is middle hard site soil, the construction method of the soil squeezing and discharging is adopted, the middle sleeve drilling tool 22 (at the moment, the drill bit of the center drilling tool 12 extends out of the bottom end of the middle sleeve drilling tool 22, and the drill bit is reversed in the drilling process, so that the soil is prevented from being rotationally discharged, the functions of positioning the middle sleeve drilling tool 22 and breaking soil and drilling are only achieved), the outer sleeve drilling tool 32 sequentially drills soil squeezing holes in the soft-middle soft site soil (or the bottom end of the middle sleeve drilling tool 22 slightly penetrates through a soil squeezing area), stops drilling, and then the center drilling tool 12 rotates forwards to continuously drill the soil in a rotary discharging mode to form a pile hole, and the designed depth is reached in the middle hard site soil. Further, the first diameter-variable pile body hole forming method of the pile top can also adopt a soil discharging mode (mainly see the compaction degree of the middle sleeve drilling tool 22 to the soil of the pile hole wall). The pressurizing point of the process pressurizing device 15 is arranged on the middle power head 21.
For a threaded variable diameter pile:
For example: the stratum in the length range of the treated pile is soft and medium soft field soil (or most of soft and medium soft field soil), a screw thread soil squeezing method is adopted, and a screw thread pile hole is formed by sequentially and respectively drilling soil squeezing by adopting a synchronous technology from the center drilling tool 12, the middle sleeve drilling tool 22 and the outer sleeve drilling tool 32. Further, the pressurizing point of the process pressurizing device 15 is disposed on the upper power head 11. The first diameter-variable pile body hole forming method of the pile top can also adopt a soil discharging mode to form a pile hole with equal diameter (stress concentration of the pile top and increase the stress area of the cross section of the pile top).
For example: the upper part of the stratum in the length range of the treated pile is soft-middle soft site soil, the lower part is middle hard site soil, the upper thread is adopted to squeeze soil and the lower part is used for discharging soil, the soil squeezing and discharging method is adopted, a middle sleeve drilling tool 22 (when the drill bit of the center drilling tool 12 stretches out of the bottom end of the middle sleeve drilling tool 22, reverse rotation is prevented during drilling, the soil is prevented from being discharged in a rotating way, only the functions of positioning the middle sleeve drilling tool 22 and breaking soil are achieved), an outer sleeve drilling tool 32 sequentially and respectively adopts a synchronous technology to drill soil squeezing and forming thread pile holes, and the bottom end of the middle sleeve drilling tool 22 stops after the middle soft site soil is not penetrated or slightly penetrated, and when the center drilling tool 12 continues to forward pass and drill the soil draining and forming pile holes in the rotating way, the designed depth is reached in the middle hard site soil. Furthermore, the first diameter-variable pile body hole forming method of the pile top can also adopt a soil discharging mode to form a pile hole with equal diameter (stress concentration of the pile top and increase the stress area of the cross section of the pile top). The pressurizing point of the process pressurizing device 15 is arranged on the middle power head 21.
Example III
As shown in fig. 15 to 24, the present embodiment further provides a pile 4 prepared according to the multi-power composite drilling tool, which includes: body shaft 41; at least two inverted cone step-shaped bodies 42 are arranged on the main pile body 41; the angle range between the inclined plane extension line of the diameter-changing part of the back taper step-shaped body 42 and the central axis of the main pile body 41 is: 5-90 deg. For example: the diameter-changing part of the back taper step-shaped body 42 is positioned at the shallow part of the pile body, and the angle range value of the inclined plane extension line of the diameter-changing part of the back taper step-shaped body 42 and the central axis of the main pile body 41 is preferably 30-45 degrees. Also for example: the diameter-changing part of the back taper step-shaped body 42 is positioned at the deep part of the pile body, and the angle range of the inclined plane extension line of the diameter-changing part of the back taper step-shaped body 42 and the central axis of the main pile body 41 is 5-90 degrees (for example, 30 degrees, 45 degrees, 60 degrees and 75 degrees).
In addition, there may be various forms for main body 41.
For example, non-threaded variable diameter piles: two back taper step-shaped bodies 42 are arranged on the main pile body 41, and an included angle between an inclined plane extension line of a reducing position of the back taper step-shaped bodies 42 and the central axis of the main pile body 41 is 5-900 degrees.
For another example, a screw-type variable diameter pile: the main pile body 41 is provided with two back taper step-shaped bodies 42, which are divided into a first pile body, a second pile body and a third pile body from top to bottom, wherein at least one of the first pile body, the second pile body and the third pile body has a thread structure. The included angle between the inclined plane extension line of the diameter-changing part of the inverted cone step-shaped body 42 and the central axis of the main pile body 41 is 5-900 degrees.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (2)
1. A multi-powered compound drilling tool, comprising: a lower power drilling tool, a middle power drilling tool and an upper power drilling tool which are coaxially sleeved in sequence; the lower power drilling tool, the middle power drilling tool and the upper power drilling tool are respectively provided with a power mechanism, and the power mechanisms can independently drive the corresponding drilling tools to rotate; the lower power drill includes: a lower power head and an outer sleeve drilling tool; the lower power head is arranged at the upper end of the outer sleeve drilling tool and is used for driving the outer sleeve drilling tool to rotate; the lower power drill further includes: a lower soil discharging groove; the lower soil discharging groove is arranged at the upper end of the lower power head; the medium power drilling tool includes: the middle power head, the middle sleeve drilling tool and the middle lifting device; the middle power head is arranged at the upper end of the middle sleeve drilling tool and used for driving the middle sleeve drilling tool to rotate; the middle lifting device is arranged at the lower end of the middle power head and is used for driving the lower power drilling tool to lift; the medium power drilling tool further comprises: the middle soil discharging groove and the middle limiting device are arranged at the upper end of the middle power head; the middle limiting device is arranged at the lower end of the middle power head; the upper power drill includes: the device comprises an upper power head, a central drilling tool and an upper lifting device; the upper power head is arranged at the upper end of the central drilling tool and is used for driving the central drilling tool to rotate; the upper lifting device is arranged at the lower end of the upper power head and is used for driving the middle power drilling tool to lift; the upper power drill further includes: an upper limit device; the upper limiting device is arranged at the lower end of the upper power head; the multi-power composite drilling tool further comprises: and a pressurizing device provided to any one of the upper power drill and the middle power drill.
2. A method of preparing a swage pile using the multi-motor composite drilling tool of claim 1, comprising:
According to the requirements of the stratum on the construction method, the upper power drilling tool, the middle power drilling tool and the lower power drilling tool sequentially drill to the respective designed depths, so that a plurality of back taper step type drilling holes can be formed; starting a concrete pump, pressing and pouring concrete, lifting an upper power drilling tool, a middle power drilling tool and a lower power drilling tool in sequence while pressing and pouring concrete, and lifting the bottom ends of the power drilling tools synchronously after the bottom ends are flush in sequence until the hole elevation is reached, and simultaneously, pressing and pouring concrete into piles to the designed elevation, thereby realizing the one-time completion of hole forming and concrete pressing and pouring into piles.
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| CN201811186080.9A CN109372421B (en) | 2018-10-11 | 2018-10-11 | Multi-power composite drilling tool, preparation method and pile |
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| CN201811186080.9A CN109372421B (en) | 2018-10-11 | 2018-10-11 | Multi-power composite drilling tool, preparation method and pile |
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| JP3905294B2 (en) * | 2000-09-28 | 2007-04-18 | 新日本製鐵株式会社 | Rotating penetrating steel pipe pile |
| CN1277024C (en) * | 2004-12-29 | 2006-09-27 | 雷玉华 | Construction machinery for long spiral press pouring concrete lock pin combination piles |
| CN104763328B (en) * | 2015-04-02 | 2017-03-08 | 宁波易和桩基工程技术开发有限公司 | A kind of hydraulic pressure reaming circulation drilling machine and its reaming pile constructing process |
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|---|---|---|---|---|
| CN207296871U (en) * | 2017-06-23 | 2018-05-01 | 刘淼 | The structure-improved of full-sleeve twist bit |
| CN108035341A (en) * | 2018-01-24 | 2018-05-15 | 李广信 | Extruding and removing soil complex superposition is nested drilling tool, the back taper stepped ramp type stake of CFG reducings and method |
| CN209244498U (en) * | 2018-10-11 | 2019-08-13 | 李广信 | More Power compound drilling tools |
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Application publication date: 20190222 Assignee: Hebei cone base civil engineering Co.,Ltd. Assignor: Li Guangxin Contract record no.: 2019990000261 Denomination of invention: Multi-power compound drilling tool, production method thereof and pile License type: Exclusive License Record date: 20190801 |
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