CN108266131A - Rotate soil compaction bottom expanding drill and method for constructing foundation pile - Google Patents
Rotate soil compaction bottom expanding drill and method for constructing foundation pile Download PDFInfo
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- CN108266131A CN108266131A CN201810204493.9A CN201810204493A CN108266131A CN 108266131 A CN108266131 A CN 108266131A CN 201810204493 A CN201810204493 A CN 201810204493A CN 108266131 A CN108266131 A CN 108266131A
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- soil compaction
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- joining beam
- rotatable blades
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- 239000002689 soil Substances 0.000 title claims abstract description 158
- 238000005056 compaction Methods 0.000 title claims abstract description 140
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000010276 construction Methods 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 239000003921 oil Substances 0.000 claims description 28
- 238000005553 drilling Methods 0.000 claims description 17
- 239000011435 rock Substances 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010720 hydraulic oil Substances 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000002787 reinforcement Effects 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 238000009716 squeeze casting Methods 0.000 claims description 3
- 230000015271 coagulation Effects 0.000 claims description 2
- 238000005345 coagulation Methods 0.000 claims description 2
- 238000005266 casting Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 230000010412 perfusion Effects 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 241000826860 Trapezium Species 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910052571 earthenware Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- -1 silt Substances 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
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/36—Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds
-
- 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
- E02D5/48—Piles varying in construction along their length, i.e. along the body between head and shoe, e.g. made of different materials along their length
-
- 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
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
- E21B10/322—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools cutter shifted by fluid pressure
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Earth Drilling (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention is related to rotating soil compaction bottom expanding drill and method for constructing foundation pile.Including connector, spiral cylinder soil compaction blade, cylinder core pipe, axis and apex point assembly；Equipped with rotatable blades, oil cylinder, direct acting joining beam positioning device, direct acting joining beam and slide fastener；Rotatable blades are mounted between the terminal part of spiral cylinder soil compaction blade and cutting tooth I, and rotatable blades one end is connect with axis pin, and the other end is flexibly connected by locating aperture with cylinder core pipe；Oil cylinder and direct acting joining beam positioning device are fixed on cylinder core pipe inner wall by frame and are sealed by sealing ring respectively；Direct acting joining beam positioning device positions direct acting joining beam；Slide fastener one end is fixed on rotatable blades, and the other end is fixed on direct acting joining beam, direct acting joining beam is kept to contact and opposite can be slided always with rotatable blades by slide fastener；Oil cylinder drives direct acting joining beam mobile and then drives rotatable blades rotation.The invention institute pile belongs to part soil compaction base expanding and base expanding guncreting pile, and casting is few, high capacity, at low cost, construction controllability is good.
Description
Technical field
The invention is related to building pile foundation construction field.It is more particularly to a kind of in spiral soil compaction guncreting pile is constructed,
Pass through the flow pore-forming tool and pile making method of a kind of novel reducing present walling pile that base expanding and base expanding is formed.
Background technology
In existing building pile foundation construction, spiral soil compaction guncreting pile is widely used, and due to the effect of soil compaction effect, carries
The ultimate frictional resistance standard value and standard ultimate bearing capacity, particularly bearing course at pile end of high stake week rock-soil layer are hard formation,
The bearing capacity of stake is greatly improved.But for (such as completely decomposed rock) that bearing course at pile end is middle soft rock soil layer, stake
The more common long auger guncreting pile of bearing capacity improve only 20%~40% or so.So for large bearing capacity is required
Stake can only realize that this results in the defects of of high cost, the construction period is long deeply by increasing stake diameter or lengthening stake.If by existing
Long auger base expanding and base expanding construction method is constructed for spiral soil compaction guncreting pile, and the Rock And Soil to get off is cut when equally existing base expanding and base expanding
Stake holes bottom is deposited in, if to clear up the nonlocal table that portals, needs special clear earthenware tool.When it is time-consuming, second is that easily collapse hole causes
There is the possibility bigger of accident in the higher stratum of accident, particularly level of ground water.If not clearing up direct concrete perfusion,
Bottom hole loosened soil is excessive, directly affects pile quality, and settling amount is excessive.
Invention content
In order to solve problem above, a kind of casting of the invention offer is few, high capacity, at low cost, construction is controllable
Property it is good, formed reducing present walling pile rotation soil compaction bottom expanding drill and method for constructing foundation pile.
The invention the technical solution adopted is that：Soil compaction bottom expanding drill is rotated, including connector, spiral cylinder soil compaction leaf
Piece, cylinder core pipe, axis and apex point assembly, connector are welded into one for coaxial group with cylinder core pipe upper end, spiral cylinder soil compaction blade group
The outer surface of group weldering body that connector is formed with cylinder core pipe is welded in, and cutting tooth I is equipped at lower end；Apex point assembly is around installation
Axis in cylinder core pipe bottom end rotates, and the port of cylinder core pipe is closed or opened by semi-circular plate；Equipped with rotatable blades, oil
Cylinder, direct acting joining beam positioning device, direct acting joining beam and slide fastener；The rotatable blades are mounted on the end of spiral cylinder soil compaction blade
Between end and cutting tooth I, one end of rotatable blades is connect with mounted on cylinder core pipe upper pin, and the other end is by being opened in column
Locating aperture in body core pipe is flexibly connected with cylinder core pipe；Oil cylinder is fixed on by frame I on cylinder core pipe inner wall, direct acting joining beam
Positioning device is fixed on by frame II on cylinder core pipe inner wall, is sealed between oil cylinder and direct acting joining beam positioning device by sealing ring；
Direct acting joining beam positioning device positions direct acting joining beam；Slide fastener one end is fixed on rotatable blades, and the other end is fixed on direct acting joining beam
On, direct acting joining beam is kept to contact and opposite can be slided always with rotatable blades by slide fastener；Oil cylinder is driven above and below direct acting joining beam
Mobile, direct acting joining beam, which moves up and down, drives one end rotation counter-cylinder core pipe of rotatable blades to be closed and open.
Above-mentioned rotation soil compaction bottom expanding drill, the rotatable blades are made of spiral rotating soil compaction blade and surface plate
Integral structure；Spiral rotating soil compaction blade is equipped with cutting tooth II, and the inner edge of surface plate is formed with curve slope A, rotatable blades
Side make arc surface, arc surface is concentric with pin shaft hole；Direct acting joining beam lower part is arranged with two skewbacks, the inclined-plane of skewback
It is contacted always with curve slope B for curve slope B, curve slope A；Rotatable blades and direct acting joining beam by curve slope A with
Curve slope B is opposite to be slided.
Above-mentioned rotation soil compaction bottom expanding drill, rotatable blades in the closure state, outer diameter and spiral cylinder soil compaction
Outer blade diameter is identical.
Above-mentioned rotation soil compaction bottom expanding drill, the plane in the size and rotatable blades of the locating aperture in cylinder core pipe
Board size matches, and keep rotatable blades around axis pin rotate when, locating aperture and rotatable blades fit clearance are 1.5
Between~2mm.
Above-mentioned rotation soil compaction bottom expanding drill, equipped with antiseepage sheath, antiseepage sheath one end is fixed on direct acting joining beam positioning dress
It puts, the other end is fixed on direct acting joining beam.
Above-mentioned rotation soil compaction bottom expanding drill, oil cylinder are equipped with into flowline, are blocked up by cylinder barrel, nut, piston, cylinder, piston rod
It is formed with sealing element；The piston rod of oil cylinder takes screw thread pair M rigid attachments by direct acting joining beam positioning device and direct acting joining beam, uses
Jackscrew positioning and locking.
Above-mentioned rotation soil compaction bottom expanding drill, direct acting joining beam positioning device is by housing, locating piece, end cap and sealing element group
Into；Guide groove C is equipped in housing, for locating piece displacement, locating piece is fixed on by screw thread pair on direct acting joining beam.
Above-mentioned rotation soil compaction bottom expanding drill, equipped with cone core pipe and screw cone soil compaction blade；The big end of cone core pipe
Weldering is coaxially organized with cylinder core pipe bottom end, the small end of cone core pipe is arranged with otic placode III, and axis is mounted on otic placode III, apex point assembly
It is pivoted, the portlet of cone core pipe is closed or opened by semi-circular plate；Screw cone soil compaction blade lower end is equipped with cutting tooth
Ⅲ。
A kind of method for constructing foundation pile, using above-mentioned rotation soil compaction bottom expanding drill, rotation soil compaction bottom expanding drill successively with mark
Similar spiral soil compaction drilling rod is connected with hydraulic oil gyrator, and the outer housing of hydraulic oil gyrator is fixed on power head, including as follows
Step：
(1) stake machine is in place, rotation soil compaction bottom expanding drill align piles position；
(2) start power head, rotate clockwise and discharge power head, rotate the rotatable leaf of soil compaction bottom expanding drill at this time
Piece is in fully closed condition, and master screw soil compaction drilling rod drives rotation soil compaction bottom expanding drill to make to squeeze casting brill vertically downwards
Into until stake depth is designed, rotation soil compaction bottom expanding drill keeps original place to continue to rotate in the same direction, fully squeezes stake holes bed rock soil
Layer, meanwhile, start concrete pump delivering concrete into cylinder core pipe, and keep base expanding and base expanding construction complete before, stake holes bottom is mixed
Solidifying soil pressure is not less than 5MPa；
(3) rotation soil compaction bottom expanding drill kept original place rotating Vortex after 1~3 minute, promoted rotation soil compaction bottom expanding drill
200~350mm, apex point assembly are pivoted, and semi-circular plate is opened completely；Continue revolution 1~3 in rotation soil compaction bottom expanding drill original place
Minute, under the action of stake holes bottom pressure concrete, the ground on bottom of drill bit blade is made to transmit fully up；
(4) start hydraulic control system, control continues the cylinder efficient in the rotation soil compaction bottom expanding drill of rotation, oil cylinder
Interior piston rod drives direct acting joining beam to move down, and in folding process, driving rotatable blades gradually open, until rotatable blades
It opens completely；
(5) it after rotatable blades are opened completely, is slowly promoted and rotates soil compaction bottom expanding drill, the cutting on rotatable blades
Tooth II carries out upward base expanding and base expanding cutwork until base expanding and base expanding design height requirement；During base expanding and base expanding, the ground to get off is cut off in stake
Under the action of pressure of the hole in the bottom concrete and rotation soil compaction bottom expanding drill, from bottom to top transmitted along helical blade；
(6) by hydraulic control system, the piston rod in control cylinder drives direct acting joining beam to move up, during moving up,
Driving rotatable blades are gradually closed, until rotatable blades are closed completely with cylinder core pipe；
(7) rotation soil compaction bottom expanding drill and pump concrete are continued to lift up, keeps being promoted the phase of speed and pump output
Match, carry out pile body perfusion, until design of pile top absolute altitude, stops power head rotation, rotation soil compaction bottom expanding drill is promoted and pumping is mixed
Solidifying soil；
(8) rotation soil compaction bottom expanding drill is removed, steel reinforcement cage is placed and enters in stake holes, steel reinforcement cage is pressed into vibrator and is designed
Absolute altitude completes primary construction.
By above-mentioned method for constructing foundation pile, institute into foundation pile be reducing present walling pile.
The advantageous effect of the invention is：The invention devises rotatable blades, with gear in cylinder core pipe
Structure control device drives the open and close of rotatable blades, and in foundation pile construction, can expanding a bottom outlet, that reducing is made is cast-in-place
Stake.Institute's pile belongs to part soil compaction base expanding and base expanding guncreting pile, and casting is few, high capacity, at low cost, construction controllability is good.Utilize this hair
The bright bearing capacity created formed reducing present walling pile and further improve spiral soil compaction guncreting pile, reduces cost.
Description of the drawings
Fig. 1 is 1 rotating cylinder soil compaction bottom expanding drill structure diagram (rotatable blades closed state) of embodiment.
Fig. 2 is 1 rotating cylinder soil compaction bottom expanding drill structure diagram (rotatable blades opening state) of embodiment.
Fig. 3 is 2 rotating cone soil compaction bottom expanding drill structure diagram (rotatable blades closed state) of embodiment.
Fig. 4 is 2 rotating cone soil compaction bottom expanding drill structure diagram (rotatable blades opening state) of embodiment.
Fig. 5 is rotatable blades driving principle schematic diagram.
Fig. 6 is rotatable blades structure diagram.
When Fig. 7 is rotatable blades full open position, radial axle diagrammatic cross-section.
Fig. 8 is rotatable blades drive part structure diagram.
Fig. 9 is direct acting joining beam front view.
Figure 10 is direct acting joining beam vertical view.
Figure 11 is master screw soil compaction jackrod structure schematic diagram.
Figure 12 is rotation soil compaction bottom expanding drill construction schematic diagram.
Specific embodiment
1 rotating cylinder soil compaction bottom expanding drill of embodiment
As shown in Figure 1, Figure 2, shown in Fig. 5-Figure 10, rotating cylinder soil compaction bottom expanding drill, including connector 1, spiral cylinder soil compaction leaf
Piece (2), cylinder core pipe (3), rotatable blades (4), axis (5), apex point assembly (6), axis pin (7), oil cylinder (11), frame I (12),
Direct acting joining beam positioning device (13), frame II (14), direct acting joining beam (15), slide fastener (16) and antiseepage sheath (10).
Connector (1) is welded into one for coaxial group with cylinder core pipe (3) upper end, two symmetrical group of spiral cylinder soil compaction blades (2)
The outer surface of group weldering body that connector (1) is formed with cylinder core pipe (3) is welded in, and cutting tooth I (2- 1) is equipped at lower end.
Cylinder core pipe (3) bottom end is arranged with otic placode I (3-1), and middle and lower part is arranged with otic placode II (3-2), and equipped with can
For the locating aperture (3-3) of rotatable blades (4) rotary moveable.On otic placode I (3-1), axis pin (7) is mounted on axis (5)
Otic placode II (3-2).The size of locating aperture (3-3) in cylinder core pipe (3) and the surface plate (4-3) in rotatable blades (4)
Size matches, and keep rotatable blades (4) around axis pin (7) rotate when, locating aperture (3-3) is matched with rotatable blades (4)
Gap is closed between 1.5~2mm.
Apex point assembly (6) is rotated around axis (5), and the port of cylinder core pipe (3) is closed or opened by semi-circular plate (6-1).
Rotatable blades (4) are integrally formed structure by spiral rotating soil compaction blade (4-2) and surface plate (4-3)；Composition can
The spiral rotating soil compaction blade (4-2) of rotating vane (4) outer rim be equipped with cutting tooth II (4-1), rotatable blades (4) it is interior
Edge is formed with curve slope A, and arc surface D is made in the side of rotatable blades (4), and arc surface D and pin shaft hole (4-4) are concentric.It can
Rotating vane (4) is between the terminal part of spiral cylinder soil compaction blade (2) and cutting tooth I (2-1), rotatable blades (4)
One end connect with axis pin (7), the other end around axis pin (7) rotate and pass through the locating aperture (3-3) in cylinder core pipe (3) with
Cylinder core pipe (3) is flexibly connected.Rotatable blades (4) in the closure state, maximum outside diameter and spiral cylinder soil compaction blade
(2) outer diameter is identical.
Direct acting joining beam (15) lower part is arranged with two skewbacks (15-1), and the inclined-plane of skewback (15-1) is curve slope B.Arc
Shape inclined-plane B is contacted always with the curve slope A on rotatable blades (4) and two cambered surfaces contact inclination angle matches；Rotatable blades
(4) it is slided with direct acting joining beam (15) by the way that curve slope A is opposite with curve slope B.
Slide fastener (16) one end is fixed on rotatable blades (4), and the other end is fixed on the skewback (15- of direct acting joining beam (15)
1) on, keeping curve slope A by slide fastener (16), reliable contacts opposite can simultaneously slide always with curve slope B two sides.
Oil cylinder (11) is fixed on by frame I (12) on cylinder core pipe (3) inner wall, and oil cylinder (11) is equipped with into flowline, by cylinder
Cylinder (11-1), nut (11-2), piston (11-3), cylinder block up (11-4), piston rod (11-5) and sealing element composition.
Direct acting joining beam positioning device (13) is fixed on by frame II (14) on cylinder core pipe (3) inner wall, the positioning of direct acting joining beam
Device (13) is made of housing (13-1), locating piece (13-2), end cap (13-3) and sealing element.It is equipped with and is oriented in housing (13-1)
Slot C, for locating piece (13-2) displacement, locating piece (13-2) is fixed on by screw thread pair on direct acting joining beam (15).
It is sealed between oil cylinder (11) and direct acting joining beam positioning device (13) by sealing ring.Direct acting joining beam positioning device (13) is fixed
Position direct acting joining beam (15).The piston rod (11-5) of oil cylinder (11) passes through direct acting joining beam positioning device (13) and direct acting joining beam (15)
Screw thread pair M rigid attachments are taken, with jackscrew (13-4) positioning and locking.Oil cylinder (11) drives direct acting joining beam (15) to move up and down, directly
Dynamic joining beam (15) moves up and down one end rotation for driving rotatable blades (4), and counter-cylinder core pipe (3) is closed and opens.
Antiseepage sheath (10) is a kind of scalable steel skeleton sealing element, and one end is fixed on direct acting joining beam positioning device (13)
On end cap (13-3), the other end is fixed on direct acting joining beam (15).
The section of spiral cylinder soil compaction blade (2) and spiral rotating soil compaction blade (4-2) is trapezium structure.
Rotatable blades (4) in the open state, above spiral soil compaction blade (4-2) of rotatable blades outer rim with
Horizontal plane is at an angle β in radial-axial plane, and between β=15~30 °, the cutting tooth II (4-1) in rotatable blades outer rim with
Its mounting surface is into δ angles, and between δ=105~120 °.
2 rotating cone soil compaction bottom expanding drill of embodiment
As shown in Fig. 3, Fig. 4, Fig. 5-10, rotating cone soil compaction bottom expanding drill, including connector 1, spiral cylinder soil compaction blade
(2), cylinder core pipe (3), rotatable blades (4), axis (5), apex point assembly (6), axis pin (7), cone core pipe (8), screw cone
Soil compaction blade (9), oil cylinder (11), frame I (12), direct acting joining beam positioning device (13), frame II (14), direct acting joining beam (15), slide fastener
(16) and antiseepage sheath (10).
Other structures are identical with the rotating cylinder soil compaction bottom expanding drill of embodiment 1, are a difference in that：Soil compaction base expanding and base expanding is rotated to bore
The bottom of head increases cone core pipe (8) and screw cone soil compaction blade (9).
The big end of cone core pipe (8) coaxially organizes weldering with cylinder core pipe (3) bottom end, and the small end of cone core pipe (8) is arranged with
Otic placode III (8-1), on otic placode III (8-1), apex point assembly (6) rotates axis (5) around axis (5), is closed by semi-circular plate (6-1)
Close or open the portlet of cone core pipe (8)；Screw cone soil compaction blade (9) lower end is equipped with cutting tooth III (9-1).Screw conic
The section of body soil compaction blade (9) is trapezium structure.
3 method for constructing foundation pile of embodiment
(1) operation principle of soil compaction bottom expanding drill is rotated
As shown in Fig. 1~10, rotation soil compaction bottom expanding drill uses major diameter core pipe, section as trapezoidal spiral soil compaction blade group
It closes, there is the effect for squeezing casting.The spiral rotating soil compaction blade of rotatable blades (4) outer rim in the shape of a spiral, is arranged on cylinder
The middle and lower part of core pipe makes squeezed again to be carried out at maximum diameter in institute's extrusion soil pore-forming.Its operation principle is：Vertically downwards
When soil compaction is crept into, for rotatable blades (4) in closed state, maximum outside diameter is identical with spiral soil compaction blade (2) outer diameter.At this time
By the piston rod (11-5) of hydraulic control system control cylinder (11) in retracted state, rotatable blades (4) pass through slide fastener
(16) it is tensed, and positioned by the curve slope B small ends of skewback (15-1) on direct acting joining beam (15) to tiltedly upper by direct acting joining beam (15),
Keep the stable state of rotatable blades (4).After creeping into design hole depth, drilling tool cast is kept, makes stake holes bed rock soil layer
It obtains fully compacted.Then guncreting is first pumped, and continuously pressure fills, then carries 200~350mm of drilling tool.Drilling tool keep original place after
Continuous revolution 1~3 minute or so, makes the ground on bottom of drill bit blade be passed up under the action of stake holes bottom pressure concrete.
Then by hydraulic control system, the piston rod (11-5) that driving continues the drill bit inner cylinder (11) of rotation is protruding, drives
Direct acting joining beam (15) moves down.The curve slope B of skewback (15-1) pushes the curve slope A of rotatable blades (4), and two arcs
Face is opposite to be slided, and rotatable blades (4) is caused to be rotated around axis pin (7), realizes the function of base expanding and base expanding cutting ground.In folding process
In, driving rotatable blades (4) gradually open, until cylinder piston rod (11-5) stretches out range, rotatable blades (4)
With regard to realizing maximum joint open, maximum bellout diameter value is reached.Spiral rotating soil compaction blade in rotatable blades (4) at this time
Above (4-2) with horizontal plane in radial-axial plane into β inclination angles, and between β=15~30 °, on rotatable blades (4) edge
The established angle of cutting tooth II (4-1) is δ angles, and between δ=105~120 °, and cutting tooth II (4-1) forms in base expanding and base expanding work
Very big cutting anterior angle.So as to ensure that the ground that base expanding and base expanding is cut is moved to drilling tool center position, and with the rotation of drilling tool
It is transmitted upwards along blade.The last drilling tool for slowly promoting rotation, after meeting base expanding and base expanding section design height, by hydraulic control system,
The total travel of oil cylinder (11) piston rod (11-5) is withdrawn, so as to withdraw rotatable blades (4), completes base expanding and base expanding construction.In base expanding and base expanding mistake
Cheng Zhong is cut the ground to get off under the action of pressure of the hole in the bottom concrete and rotary tools, along the upper surface of rotatable blades (4)
It is from bottom to top transmitted to spiral cylinder soil compaction blade, realizes that base expanding and base expanding surflaes passes in time.
Base expanding and base expanding is realized during continuously pump guncreting, full of pressure concrete in drill bit core pipe, using anti-
Sheath (10) is oozed by direct acting joining beam (15) top seal, prevents cement mortar from entering in direct acting joining beam positioning device (13), it is ensured that can
Rotating vane (4) closes freely.
(2) soil compaction base expanding and base expanding guncreting pile construction equipment is rotated
The construction of rotation soil compaction base expanding and base expanding guncreting pile is by long spire Squeezing Soil Pile machine, rotation soil compaction bottom expanding drill assembly, coagulation
The compositions such as native delivery pump and steel reinforcement cage vibrator assembly.Rotate soil compaction bottom expanding drill assembly by adapter flange, hydraulic oil gyrator,
The compositions such as master screw soil compaction drilling rod, rotation soil compaction bottom expanding drill, hydraulic control system.Hydraulic oil gyrator one end passes through reducing
Flange is connected with power head assembly output flange, and the other end is by master screw soil compaction drilling rod with rotating soil compaction bottom expanding drill phase
Connection.The outer housing of hydraulic oil gyrator is fixed on the hanger bracket of power head, be which is provided with into oil out port, is passed through high-pressure rubber pipe
It is connected with hydraulic control system.The inner body of hydraulic oil gyrator is rigidly connected with drilling rod, which is provided with oil inlet and outlet, utilizes high pressure
Oil pipe is connected by tube chamber in master screw soil compaction drilling rod and rotation soil compaction bottom expanding drill.Master screw soil compaction drilling rod is (as schemed
11) blade profile on is trapezoidal, and outer rim can determine the size of notch according to the classification of construction ground or not set notch.It is logical
Often in the case of, the compressibilities such as saturability ground, density ground it is small rock-soil layer construction, notch set or set less it is small or
It does not set.
(3) soil compaction base expanding and base expanding guncreting pile construction method is rotated, as shown in figure 12
(1) stake machine is in place, rotation soil compaction bottom expanding drill align piles position, as shown in Figure 12 (a)；
(2) start power head, rotate clockwise and discharge power head, rotate the rotatable blades of soil compaction bottom expanding drill at this time
(4) in fully closed condition, master screw soil compaction drilling rod drives rotation soil compaction bottom expanding drill to make to squeeze casting brill vertically downwards
Into until stake depth is designed, rotation soil compaction bottom expanding drill keeps original place to continue to rotate in the same direction, fully squeezes stake holes bed rock soil
Layer, meanwhile, start concrete pump to cylinder core pipe (3) interior delivering concrete, and keep base expanding and base expanding construction complete before, stake holes bottom
Concrete pressure is not less than 5MPa, as shown in Figure 12 (b)；
(3) rotation soil compaction bottom expanding drill kept original place rotating Vortex after 1~3 minute, then promoted rotation soil compaction bottom expanding drill
200~350mm or so, apex point assembly (6) are rotated around axis (5), and semi-circular plate (6-1) is opened completely；It is former to rotate soil compaction bottom expanding drill
Ground continues revolution 1~3 minute, under the action of stake holes bottom pressure concrete, makes ground on bottom of drill bit blade fully up
Transmission, as shown in Figure 12 (c)；
(4) start hydraulic control system, control continues oil cylinder (11) work in the rotation soil compaction bottom expanding drill of rotation, leads to
Direct acting drive links rotatable blades opening is crossed, makees base expanding and base expanding cutting.Piston rod (11-5) in oil cylinder (11) drives direct acting joining beam
(15) it moves down, in folding process, driving rotatable blades (4) gradually open, until rotatable blades (4) are opened completely；
(5) it after rotatable blades (4) are opened completely, is slowly promoted and rotates soil compaction bottom expanding drill, on rotatable blades (4)
Cutting tooth II (4-1) carries out upward base expanding and base expanding cutwork, and observation promotes hoisting rope displacement sensor, until base expanding and base expanding design is high
Degree requirement；During base expanding and base expanding, the ground that gets off is cut off in stake holes bottom pressure concrete and rotates the effect of soil compaction bottom expanding drill
Under, it is from bottom to top transmitted along helical blade；In this process simultaneously, keep the continuity of pump concrete, and meet groundwater increment with
The matching degree of speed is promoted, as shown in Figure 12 (c)；
(6) after the completion of reaming, by hydraulic control system, the piston rod (11-5) in control cylinder (11) drives direct acting connection
Bar (15) moves up, and during moving up, driving rotatable blades (4) are gradually closed, until rotatable blades (4) are completely and cylinder
Core pipe (3) is closed；
(7) rotation soil compaction bottom expanding drill and pump concrete is continued to lift up, keeps being promoted matching for speed and pump output,
Pile body perfusion is carried out, until design of pile top absolute altitude, stops power head rotation, rotation soil compaction bottom expanding drill is promoted and pumped concrete
Soil；
(8) rotation soil compaction bottom expanding drill is removed, steel reinforcement cage is placed and enters in stake holes, steel reinforcement cage is pressed into design mark with vibrator
Height completes primary construction, such as Figure 12 (d), (e).
(4) scope of application
Rotation soil compaction base expanding and base expanding guncreting pile is adapted to backfill, cohesive soil, silt, sand, gravel, completely decomposed rock, severely-weathered
The rock-soil layers such as soft rockmass.Stake diameter in the range of 450~800mm, stake is grown within 32m, bellout diameter than stake diameter increase by 150~
400mm, available for fields such as traffic engineering, Industrial and Civil Engineering.
Claims (10)
1. rotating soil compaction bottom expanding drill, including connector (1), spiral cylinder soil compaction blade (2), cylinder core pipe (3), axis (5) and bore
Sharp assembly (6)；Connector (1) is welded into one for coaxial group with cylinder core pipe (3) upper end, and spiral cylinder soil compaction blade (2) group, which is welded in, to be connect
The outer surface of group weldering body that head (1) is formed with cylinder core pipe (3), and cutting tooth I (2-1) is equipped at lower end；Apex point assembly
(6) around axis (5) rotation mounted on cylinder core pipe (3) bottom end, cylinder core pipe (3) is closed or opened by semi-circular plate (6-1)
Port；It is characterized in that：Equipped with rotatable blades (4), oil cylinder (11), direct acting joining beam positioning device (13), direct acting joining beam (15)
With slide fastener (16)；The rotatable blades (4) are mounted on the terminal part of spiral cylinder soil compaction blade (2) and cutting tooth I (2-1)
Between, one end of rotatable blades (4) is connect with mounted on cylinder core pipe (3) upper pin (7), and the other end is by being opened in cylinder core
Locating aperture (3-3) on pipe (3) is flexibly connected with cylinder core pipe (3)；Oil cylinder (11) is fixed on cylinder core pipe by frame I (12)
(3) on inner wall, direct acting joining beam positioning device (13) is fixed on by frame II (14) on cylinder core pipe (3) inner wall, oil cylinder (11) with
It is sealed between direct acting joining beam positioning device (13) by sealing ring；Direct acting joining beam positioning device (13) positioning direct acting joining beam (15)；It draws
Chain (16) one end is fixed on rotatable blades (4), and the other end is fixed on direct acting joining beam (15), keeps straight by slide fastener (16)
Dynamic joining beam (15) with rotatable blades (4) is contacted and opposite can be slided always；Oil cylinder (11) drives and is moved down on direct acting joining beam (15)
Dynamic, direct acting joining beam (15) moves up and down one end rotation for driving rotatable blades (4), and counter-cylinder core pipe (3) is closed and opens.
2. rotation soil compaction bottom expanding drill according to claim 1, it is characterised in that：The rotatable blades (4) are by spiral shell
Rotation rotation soil compaction blade (4-2) and surface plate (4-3) are integrally formed structure；Spiral rotating soil compaction blade (4-2) is equipped with cutting
Tooth II (4-1), the inner edge of surface plate (4-3) are formed with curve slope A, and arc surface D, circular arc are made in the side of rotatable blades (4)
Face D and pin shaft hole (4-4) are concentric；Direct acting joining beam (15) lower part is arranged with two skewbacks (15-1), skewback (15-1) it is oblique
Face is curve slope B, and curve slope A is contacted always with curve slope B；Rotatable blades (4) pass through arc with direct acting joining beam (15)
Shape inclined-plane A is opposite with curve slope B to be slided.
3. rotation soil compaction bottom expanding drill according to claim 1 or 2, it is characterised in that：Rotatable blades (4) are in closure
During state, outer diameter is identical with spiral cylinder soil compaction blade (2) outer diameter.
4. rotation soil compaction bottom expanding drill according to claim 2, it is characterised in that：Locating aperture in cylinder core pipe (3)
The size of (3-3) matches with surface plate (4-3) size in rotatable blades (4), and keeps rotatable blades (4) around axis pin
(7) when rotating, locating aperture (3-3) and rotatable blades (4) fit clearance are between 1.5~2mm.
5. rotation soil compaction bottom expanding drill according to claim 1, it is characterised in that：Equipped with antiseepage sheath (10), antiseepage shield
Set (10) one end is fixed in direct acting joining beam positioning device (13), and the other end is fixed on direct acting joining beam (15).
6. rotation soil compaction bottom expanding drill according to claim 1, it is characterised in that：Oil cylinder (11) equipped with into flowline, by
Cylinder barrel (11-1), nut (11-2), piston (11-3), cylinder block up (11-4), piston rod (11-5) and sealing element composition；Oil cylinder (11)
Piston rod (11-5) screw thread pair M rigid attachments are taken by direct acting joining beam positioning device (13) and direct acting joining beam (15), with top
Silk (13-4) positioning and locking.
7. rotation soil compaction bottom expanding drill according to claim 1, it is characterised in that：Direct acting joining beam positioning device (13) is by outer
Cover (13-1), locating piece (13-2), end cap (13-3) and sealing element composition；Guide groove C is equipped in housing (13-1), for locating piece
(13-2) displacement, locating piece (13-2) are fixed on by screw thread pair on direct acting joining beam (15).
8. rotation soil compaction bottom expanding drill according to claim 1, it is characterised in that：Equipped with cone core pipe (8) and screw conic
Body soil compaction blade (9)；The big end of cone core pipe (8) coaxially organizes weldering, the small end pair of cone core pipe (8) with cylinder core pipe (3) bottom end
Claim to be equipped with otic placode III (8-1), on otic placode III (8-1), apex point assembly (6) rotates axis (5) around axis (5), passes through semi-circular plate
(6-1) closes or opens the portlet of cone core pipe (8)；Screw cone soil compaction blade (9) lower end is equipped with cutting tooth III (9-1).
9. a kind of method for constructing foundation pile, which is characterized in that bored using claim 1-8 any one of them rotation soil compaction base expanding and base expanding
Head, rotation soil compaction bottom expanding drill is connect successively with master screw soil compaction drilling rod and hydraulic oil gyrator, outside hydraulic oil gyrator
Housing is fixed on power head, is included the following steps：
(1) stake machine is in place, rotation soil compaction bottom expanding drill align piles position；
(2) start power head, rotate clockwise and discharge power head, rotate the rotatable blades (4) of soil compaction bottom expanding drill at this time
In fully closed condition, master screw soil compaction drilling rod drives rotation soil compaction bottom expanding drill to make to squeeze casting drilling vertically downwards,
Until stake depth is designed, rotation soil compaction bottom expanding drill keeps original place to continue to rotate in the same direction, fully squeezes stake holes bed rock soil layer, together
When, start concrete pump to cylinder core pipe (3) interior delivering concrete, and keep base expanding and base expanding construction complete before, stake holes bottom coagulation
Soil pressure is not less than 5MPa；
(3) rotation soil compaction bottom expanding drill kept original place rotating Vortex after 1~3 minute, and promotion rotation soil compaction bottom expanding drill 200~
350mm, apex point assembly (6) are rotated around axis (5), and semi-circular plate (6-1) is opened completely；Continue to turn round in rotation soil compaction bottom expanding drill original place
1~3 minute, under the action of stake holes bottom pressure concrete, the ground on bottom of drill bit blade is made to transmit fully up；
(4) start hydraulic control system, control continues oil cylinder (11) work in the rotation soil compaction bottom expanding drill of rotation, oil cylinder
(11) piston rod (11-5) in drives direct acting joining beam (15) to move down, and in folding process, driving rotatable blades (4) are gradually opened
It opens, until rotatable blades (4) are opened completely；
(5) it after rotatable blades (4) are opened completely, is slowly promoted and rotates soil compaction bottom expanding drill, cutting on rotatable blades (4)
It cuts tooth II (4-1) and carries out upward base expanding and base expanding cutwork until the requirement of base expanding and base expanding design height；During base expanding and base expanding, the rock to get off is cut off
Soil from bottom to top transmits under the action of stake holes bottom pressure concrete and rotation soil compaction bottom expanding drill along helical blade；
(6) by hydraulic control system, the piston rod (11-5) in control cylinder (11) drives direct acting joining beam (15) to move up,
During moving up, driving rotatable blades (4) are gradually closed, until rotatable blades (4) are closed completely with cylinder core pipe (3)；
(7) rotation soil compaction bottom expanding drill and pump concrete is continued to lift up, keeps being promoted matching for speed and pump output, into
Row pile body is perfused, until design of pile top absolute altitude, stops power head rotation, rotation soil compaction bottom expanding drill is promoted and pump concrete；
(8) rotation soil compaction bottom expanding drill is removed, steel reinforcement cage is placed and enters in stake holes, steel reinforcement cage is pressed into designed elevation with vibrator,
Complete primary construction.
10. method for constructing foundation pile according to claim 9, which is characterized in that the foundation pile is reducing present walling pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810204493.9A CN108266131A (en) | 2018-03-13 | 2018-03-13 | Rotate soil compaction bottom expanding drill and method for constructing foundation pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810204493.9A CN108266131A (en) | 2018-03-13 | 2018-03-13 | Rotate soil compaction bottom expanding drill and method for constructing foundation pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108266131A true CN108266131A (en) | 2018-07-10 |
Family
ID=62774804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810204493.9A Withdrawn CN108266131A (en) | 2018-03-13 | 2018-03-13 | Rotate soil compaction bottom expanding drill and method for constructing foundation pile |
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| Country | Link |
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| CN (1) | CN108266131A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111101855A (en) * | 2020-03-05 | 2020-05-05 | 浙江大学城市学院 | Low-noise punching and reaming device for pile foundation engineering |
| CN113846632A (en) * | 2021-10-29 | 2021-12-28 | 刘守进 | Soil-squeezing pile construction method for reinforcing part of bearing layer |
| BE1028932B1 (en) * | 2020-12-23 | 2022-07-18 | Noterman Putboringen | Drilling facility and method for manufacturing an in-situ soil-displacement screw pile |
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| JPH11217829A (en) * | 1998-02-02 | 1999-08-10 | Mitani Sekisan Co Ltd | Construction of footing pile, footing pile, and precast hollow pile |
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| CN113846632A (en) * | 2021-10-29 | 2021-12-28 | 刘守进 | Soil-squeezing pile construction method for reinforcing part of bearing layer |
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Application publication date: 20180710 |