CN109025808B - Multi-power guide linkage composite drilling tool, preparation method and pile type - Google Patents
Multi-power guide linkage composite drilling tool, preparation method and pile type Download PDFInfo
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- CN109025808B CN109025808B CN201811185498.8A CN201811185498A CN109025808B CN 109025808 B CN109025808 B CN 109025808B CN 201811185498 A CN201811185498 A CN 201811185498A CN 109025808 B CN109025808 B CN 109025808B
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- 238000005553 drilling Methods 0.000 title claims abstract description 245
- 239000002131 composite material Substances 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000004567 concrete Substances 0.000 claims abstract description 28
- 238000010276 construction Methods 0.000 claims abstract description 18
- 238000003825 pressing Methods 0.000 claims abstract description 15
- 239000002689 soil Substances 0.000 claims description 77
- 238000007599 discharging Methods 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 20
- 238000005056 compaction Methods 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 6
- 230000000670 limiting effect Effects 0.000 claims description 5
- 230000002441 reversible effect Effects 0.000 claims description 5
- 230000002829 reductive effect Effects 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 239000011150 reinforced concrete Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 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
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000002310 elbow joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 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
- E21B7/00—Special methods or apparatus for drilling
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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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/22—Rods or pipes with helical structure
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The utility model relates to the technical field of civil engineering, in particular to a multi-power guide linkage composite drilling tool, a preparation method and a pile type. The multi-power guiding linkage composite drilling tool comprises: the guide linkage drilling tool, the middle power drilling tool and the upper power drilling tool are coaxially sleeved in sequence; the upper power drilling tool and the middle power drilling tool are respectively provided with a power device, and the power devices can independently drive the corresponding drilling tools to rotate; the guide linkage drilling tool is provided with a guide device, and the guide device can realize guide linkage between the guide linkage drilling tool and the middle power drilling tool. When the composite drilling tool is used for construction, each drilling tool is converted from a traditional linkage mode into a mode of active driving and linkage assistance, and hole forming and concrete pressing and grouting pile forming can be completed at one time, so that 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 utility model relates to the technical field of civil engineering, in particular to a multi-power guide linkage composite drilling tool, a preparation method and a pile type.
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 guiding linkage device technology that this patent relates to quotes: the utility model is as follows: 201820159509.4, name of utility model: a guiding device and a drilling tool. (inventive patent is in the examination stage)
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 utility model 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 utility model aims to provide a multi-power guide linkage 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, poor adaptability and low single pile bearing capacity in the prior art.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
in a first aspect, the present utility model provides a multi-power steering linkage compound drilling tool, comprising: the guide linkage drilling tool, the middle power drilling tool and the upper power drilling tool are coaxially sleeved in sequence;
the upper power drilling tool and the middle power drilling tool are respectively provided with a power device, and the power devices can independently drive the corresponding drilling tools to rotate; the guide linkage drilling tool is provided with a guide device, and the guide device can realize guide linkage between the guide linkage drilling tool and the middle power drilling tool.
As a further technical solution, the guiding linkage drilling tool includes: an outer sleeve drilling tool and a first guide position linkage device, namely a guide position linkage rod; the periphery of the first guide position linkage device and the guide position linkage rod is provided with a guide column.
As a further technical scheme, the outer sleeve drilling tool is provided with a protective sleeve, and the verticality of the outer sleeve drilling tool is fixed and maintained through slips on the protective sleeve and the drilling tower; when the soil discharge method is adopted, a plurality of soil discharge holes are formed in the outer sleeve drilling tool; when the soil compaction method is adopted, the outer sleeve drilling tool does not need to be provided with a soil discharging hole.
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 guide linkage drilling tool to lift; the guide device comprises a second linkage device-guide linkage groove arranged on the middle sleeve drilling tool, and a guide groove and a guide ridge surface are arranged at the upper part of the second linkage device-guide linkage groove; when the guide ridge surface is contacted with the guide post on the guide linkage rod, the guide post can rotate along the guide ridge surface to enter the entrance of the guide groove, and passively moves upwards to the horn mouth of the guide groove, so that the guide linkage rod accurately enters the guide linkage groove, and the interlocking work of the linkage device is completed.
As a further technical solution, the medium power drilling tool further includes: the middle soil discharging groove is arranged at the upper 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 solution, the multi-power guiding linkage composite drilling tool includes: and a pressurizing device provided to any one of the upper power drill and the middle power drill.
In a second aspect, the present utility model provides a pile prepared according to the multi-power steering linkage 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 utility model also provides a method for preparing a pile by interlocking a composite drilling tool according to the multi-power steering, comprising:
according to the requirements of the stratum on the construction method, the upper power drilling tool, the middle power drilling tool and the guide position linkage drilling tool sequentially drill to the respective designed depths, so that a plurality of reverse 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 guide linkage drilling tool in sequence while pressing and pouring concrete, and lifting the bottom ends of the 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 utility model has the following beneficial effects:
the utility model provides a multi-power guide linkage composite drilling tool, which comprises a guide linkage drilling tool, a middle power drilling tool and an upper power drilling tool, wherein the middle power drilling tool and the upper power drilling tool of the drilling tool are respectively provided with a power mechanism, the guide linkage drilling tool is provided with a guide device, and the guide device can realize guide linkage between the guide linkage drilling tool and the middle power drilling tool. By the construction of the composite drilling tool, each drilling tool is converted from a traditional linkage mode into a mode of actively driving and adding linkage assistance, and hole forming and concrete pressure grouting pile forming can be completed at one time, so that the degree of automation is high, the improvement of work efficiency and single pile bearing capacity is realized, meanwhile, the cost is reduced, and the construction period is shortened; the adaptability is strong, and the popularization and the application are facilitated.
The utility model provides a pile prepared by a multi-power guiding linkage composite drilling tool, 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 taper disc of a reverse taper 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 is 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 utility model 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 guide linkage drilling tool to respective designed depths according to the requirements of stratum on a construction method, so that a plurality of inverted cone step-shaped 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 guide linkage drilling tool while pressing and pouring concrete, and synchronously lifting the bottom ends of the 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 utility model 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 utility model 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 diagram of an initial state structure of a multi-power guiding linkage composite drilling tool according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a drilling state structure of a multi-power guiding linkage composite drilling tool according to an embodiment of the present utility model;
FIG. 3 is a schematic view of an upper motor according to an embodiment of the present utility model;
fig. 4 is a schematic front view of an upper power head according to an embodiment of the present utility model;
fig. 5 is a schematic structural diagram of a middle power drilling tool according to an embodiment of the present utility model;
fig. 6 is a schematic front view of a middle power head according to an embodiment of the present utility model;
fig. 7 is a schematic structural diagram of a middle soil discharging groove according to an embodiment of the present utility model;
fig. 8 is a schematic structural diagram of a guide linkage drilling tool according to an embodiment of the present utility model;
FIG. 9 is a schematic diagram illustrating an initial state of a guiding device according to an embodiment of the present utility model;
FIG. 10 is a schematic diagram illustrating a working state of a guiding device according to an embodiment of the present utility model;
fig. 11 to 19 are schematic views of construction steps of a drilling tool according to an embodiment of the present utility model;
fig. 20 to 23 are schematic views of different types of piles according to the embodiment of the present utility model.
Icon: 1-a power drilling tool; 2-a medium power drilling tool; 3-guiding linkage 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; 26-a middle soil discharge groove; 27-a guide linkage groove; 32-an outer sleeve drilling tool; 37-guiding linkage rod; 38-protecting a cylinder; 41-main body pile body; 42-back taper step profile.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.
Example 1
Referring to fig. 1 to 10, a multi-power guiding linkage composite drilling tool according to a first embodiment includes: the guide linkage drilling tool 3, the middle power drilling tool 2 and the upper power drilling tool 1 are coaxially sleeved in sequence (overlapped in sequence from outside to inside); the upper power drilling tool and the middle power drilling tool 2 are respectively provided with a power device, and the power devices can independently drive the corresponding drilling tools to rotate; the pilot linkage drilling tool 3 is provided with a pilot device, and the pilot device can realize pilot linkage between the pilot linkage drilling tool 3 and the middle power drilling tool 2. Therefore, each drilling tool is converted into a mode of active driving and linkage assistance from 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 guiding linkage drilling tool 3 includes: an outer sleeve drill 32 and a first lead linkage-lead linkage rod 37; the first guide linkage device, the guide linkage rod 37, is provided with a guide column on the outer circumferential surface.
The outer sleeve drilling tool 32 is provided with a protective sleeve 38, and the verticality of the outer sleeve drilling tool 32 is fixed and maintained through slips on the protective sleeve 38 and a drilling tower; when the soil discharge method is adopted, a plurality of soil discharge holes are formed in the outer sleeve drilling tool; when the soil compaction method is adopted, the outer sleeve drilling tool does not need to be provided with a soil discharging hole.
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 arranged at the lower end of the middle power head 21 and is used for driving the guide linkage drilling tool 3 to lift; the guide device comprises a second linkage device-guide linkage groove 27 arranged on the middle sleeve drilling tool 22, and a guide groove and a guide ridge surface are arranged at the upper part of the second linkage device-guide linkage groove 27; when the guide ridge surface is contacted with the guide column on the guide linkage rod 37, the guide column can rotate along the guide ridge surface to enter the entrance of the guide groove, and passively moves upwards to the horn mouth of the guide groove, so that the guide linkage rod 37 is enabled to accurately enter the guide linkage groove 27, and the linkage device is locked in a sleeved mode.
In this embodiment, as a further technical solution, the guiding groove is axially provided on the outer wall of the guiding linkage groove 27 along the guiding linkage groove 27, and the guiding groove has a bottom that is expanded, for example: the horn mouth shape, the during operation of aggregate unit, protection guide post avoid collision damage, guide post and guide position groove reduce friction when aggregate unit is disengaged.
In this embodiment, as a further technical solution, the upper edge of the guiding ridge has an inclined arc-shaped ramp for contacting with the guiding post.
In this embodiment, as a further technical solution, the number of the guide slots is two, and the two guide slots are respectively disposed at the positions of the bisectors in the circumferential direction of the first guide linkage slot.
There are various ways for the middle lifting device 23.
For example: the middle lifting device 23 comprises: a winch is provided at the lower end of the middle power head 21, and a hauling rope of the winch is connected with a guiding and linkage drilling tool (preferably a casing 38).
Also for example: the middle lifting device 23 comprises: a telescopic cylinder (oil cylinder) is arranged at the lower end of the middle power head 21, and a telescopic rod of the telescopic cylinder is connected with a guide position linkage drilling tool (preferably a casing 38).
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, wherein the middle soil discharging groove 26 is arranged at the upper 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 discharged by the center drilling tool 12 is led out through the inner side of the middle sleeve drilling tool 22 and the middle soil discharging groove 26. For the middle power head 21, the housing of the middle power head 21 may be hollow cylindrical, and has a soil discharge space therein, which communicates with the middle soil discharge groove 26.
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 tools 2 are sleeved by a plurality of stacks, except that the middle power drilling tools 2 contacted with the guiding linkage drilling tools 3 are provided with guiding linkage grooves, other middle power drilling tools are not provided with guiding linkage grooves, and a middle limiting device is additionally arranged; except that the diameter and the length of the sleeve drilling tool are different in structure, the sleeve drilling tool is identical to the sleeve drilling tool in structure.
Further, in the overall structure of the multi-power pilot linkage composite drilling tool, the pilot linkage drilling tool 3, the middle power drilling tool 2 and the upper power drilling tool 1 are coaxially sleeved in sequence, the pilot linkage drilling tool 3 can be coaxially sleeved between the middle power drilling tool 2 and the upper power drilling tool 1 and can be normally used, but in consideration of factors such as manufacturing, assembling and operation, the overall structure is preferably that: an upper power drilling tool 1, a middle power drilling tool 2 and a guide linkage drilling tool 3 are sleeved in sequence in a coaxial mode.
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. Preferably, 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.
For the upper power head 11, the structure and the form are basically similar to those of the power head 21, 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 soil discharging 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).
There are a variety of ways for the upper stop device 14. For example: the upper limit device 14 may be a rigid connecting rod, the length of which 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 device, 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
As shown in fig. 11 to 19, a third embodiment provides a method for preparing a pile 4 by using the multi-power composite drilling tool according to the first 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 guide linkage drilling tool 3 sequentially drill to the respective designed depths; starting a concrete pump 5, starting to press and fill concrete, and lifting the upper power drilling tool 1, the middle power drilling tool 2 and the guide linkage drilling tool 3 in sequence while pressing and filling the concrete until the bottom ends of the drilling tools are sequentially leveled, and then synchronously lifting the elevation of the outlet hole, 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 length range of the treated 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 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 and respectively 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), drilling is stopped, then the center drilling tool 12 rotates positively, the soil is continuously drilled into pile holes, and 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 (mainly see the compaction degree of the middle sleeve drilling tool 22 to the hole wall soil). The pressurizing point of the process flow 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 partial screw extrusion soil working method is adopted, and a center drilling tool 12 adopts a synchronous technology to drill into screw pile holes; the middle sleeve drilling tool 22 and the outer sleeve drilling tool 32 are sequentially and respectively used for drilling holes by using soil extrusion and discharging drilling tools mainly used for soil extrusion. The middle sleeve drilling tool 22 and the outer sleeve drilling tool 32 stop drilling after the soil drilling in the soft and middle soft sites reaches the designed depth, (when the middle sleeve drilling tool 22 and the outer sleeve drilling tool 32 drill holes in the soil squeezing area, the drill bit of the center drilling tool 12 stretches out of the bottom end of the middle sleeve drilling tool 22, and reverse rotation is adopted during drilling, so that the soil is prevented from being screwed out of the hole by the center drilling tool 12, only the functions of positioning the middle sleeve drilling tool 22 and the outer sleeve drilling tool 32 and breaking the soil are achieved, and then the center drilling tool 12 rotates positively, and the soil squeezing and forming threaded pile holes are drilled by adopting a synchronous technology. Further, the pressurizing point of the process pressurizing device 15 is arranged on the middle power head 21. Furthermore, 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 hole wall soil).
Example III
As shown in fig. 20 to 23, 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 the third pile body is provided with 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 utility model, and not for limiting the same; although the utility model 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 utility model.
Claims (2)
1. A multi-power pilot linkage composite drilling tool, comprising: the guide linkage drilling tool, the middle power drilling tool, the pressurizing device and the upper power drilling tool are coaxially sleeved in sequence; the upper power drilling tool and the middle power drilling tool are respectively provided with a power device, and the power devices can independently drive the corresponding drilling tools to rotate; the guide linkage drilling tool is provided with a guide device, and the guide device can realize guide linkage between the guide linkage drilling tool and the middle power drilling tool; the guide linkage drilling tool comprises: an outer sleeve drilling tool and a first guide position linkage device, namely a guide position linkage rod; the outer circumferential surface of the first guide position linkage device, namely the guide position linkage rod, is provided with a guide post, the outer sleeve drilling tool is provided with a protective barrel, and the outer sleeve drilling tool is fixed with the drilling tower through slips on the protective barrel to keep the verticality of the outer sleeve drilling tool; when the soil discharge method is adopted, a plurality of soil discharge holes are formed in the outer sleeve drilling tool; when the soil compaction method is adopted, the outer sleeve drilling tool does not need to be provided with a soil discharging hole;
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 guide linkage drilling tool to lift; the guide linkage device comprises a second linkage device-guide linkage groove which is arranged on the middle sleeve drilling tool, and a guide groove and a guide ridge are arranged at the upper part of the second linkage device-guide linkage groove; when the guide ridge surface is contacted with the guide post on the guide linkage rod, the guide post can rotate along the guide ridge surface to enter the entrance of the guide groove, and passively moves upwards to the horn mouth of the guide groove, so that the guide linkage rod accurately enters the guide linkage groove, and the interlocking work of the linkage device is completed; the medium power drilling tool further comprises: the middle soil discharging groove is arranged at the upper 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 pressurizing device is provided to any one of the upper power drill and the middle power drill.
2. A method of preparing a profile pile using a multi-power steering linkage composite drilling tool as claimed in 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 guide position linkage drilling tool sequentially drill to the respective designed depths, so that a plurality of reverse taper step type drilling holes can be formed; starting a concrete pump, starting to press and fill concrete, lifting an upper power drilling tool, a middle power drilling tool and a guide linkage drilling tool in sequence while pressing and filling the concrete, and lifting the bottom ends of the drilling tools synchronously after the bottom ends are leveled in sequence until the hole elevation is reached, and simultaneously, pressing and filling the concrete into piles to the designed elevation, thereby realizing the completion of hole forming and concrete pressing and filling into piles at one time.
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| CN201811185498.8A CN109025808B (en) | 2018-10-11 | 2018-10-11 | Multi-power guide linkage composite drilling tool, preparation method and pile type |
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| CN201811185498.8A CN109025808B (en) | 2018-10-11 | 2018-10-11 | Multi-power guide linkage composite drilling tool, preparation method and pile type |
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| CN109025808A (en) | 2018-12-18 |
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Application publication date: 20181218 Assignee: Hebei cone base civil engineering Co.,Ltd. Assignor: Li Guangxin Contract record no.: 2019990000261 Denomination of invention: Multi-power guide linkage compound drilling tool, preparation method and pile type License type: Exclusive License Record date: 20190801 |
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