CN109723393A - A kind of spiral is at hole drill tool and bore forming method - Google Patents
A kind of spiral is at hole drill tool and bore forming method Download PDFInfo
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- CN109723393A CN109723393A CN201910135952.7A CN201910135952A CN109723393A CN 109723393 A CN109723393 A CN 109723393A CN 201910135952 A CN201910135952 A CN 201910135952A CN 109723393 A CN109723393 A CN 109723393A
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 239000002689 soil Substances 0.000 claims abstract description 177
- 238000005056 compaction Methods 0.000 claims abstract description 128
- 238000005553 drilling Methods 0.000 claims abstract description 31
- 238000004804 winding Methods 0.000 claims abstract description 3
- 239000011435 rock Substances 0.000 claims description 16
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 15
- 230000000694 effects Effects 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 230000004907 flux Effects 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 12
- 239000011148 porous material Substances 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 abstract description 2
- 230000006978 adaptation Effects 0.000 abstract 1
- 239000004576 sand Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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Abstract
The invention is related to a kind of spiral into hole drill tool and bore forming method.Spiral includes auxiliary into bore portion and main at bore portion at hole drill tool；It is described main at bore portion, the upper end of core pipe is fixed with outer tube, and drill bit door gear, the outer winding screw soil compaction blade II of core pipe is arranged in lower end, equipped with several earth-retaining soil compaction blocks, several earth-retaining soil compaction blocks are mounted on spiral soil compaction blade II and are fixed by core pipe and spiral soil compaction blade II.Drilling construction is carried out using the drilling tool of the invention, in pore forming process, most of ground is directly expressed to aperture in downward direction at apex point, the spiral soil compaction blade II of bore portion by main, small part ground is from bottom to top transmitted along the top-surface camber of spiral soil compaction blade II, in transmit process, earth-retaining soil compaction block is pressed to aperture in downward direction to ground again, so that seldom part ground is sent to auxiliary into bore portion.The invention, adaptation geological conditions is wide, and pile bearing capacity is high, energy-efficient, environmentally protective.
Description
Technical field
The invention is related to building pile foundation construction field, in particular to a kind of spiral is at hole drill tool and building pile driving construction
Method.
Background technique
In existing building pile foundation, present walling pile occupies very big ratio, especially with pump guncreting, due to tool
There is the gluing between stake and soil around pile good, is not influenced by underground water, high efficient construction, and it is greener by exploitation unit
It looks at.Common pile-type has long auger guncreting pile, screw rod pile, SDS etc..Long auger guncreting pile is complete displacement pile,
Construction can generate a large amount of surflaes, and there is loosened soil in the stake bottom end of pile, influences the bearing capacity of stake；Screw rod pile is part displacement pile,
It is complete non-casting process in construction drilling process, soil compaction negative effect is big, and the especially small rock-soil layer of compressibility can not be crept into
Pass through, institute's pile belongs to reducing stake, and the anti-horizontal shear ability of stake is weak, and bearing capacity is mentioned than long auger guncreting pile
Height, surflaes discharge amount are many compared with also having lacked；SDS are non displacement piles, are first by the rock in cylindricality stake holes at stake holes process
Soil becomes loose free shape by rotary-cut, and loose ground is pressed against stake holes wall during uploading along helical blade, entirely
Upload procedure path is very short, and soil compaction centrality is strong, and the rock-soil layer small for compressibility is difficult to penetrate, and the stake bottom of pile exists empty
Soil influences the bearing capacity of stake.For disadvantage existing for these three cast-in-place concrete pile driving constructions.
Summary of the invention
In view of the above technical problems, according to the calculation formula of bearing capacity of single pile it is found that the foundation pile long with stake with stake diameter, different
Pore-forming mode can change the bearing capacity of stake.The invention proposes the process by being changed to stake holes, Lai Tigao
It is suitable to expand stake to reach the bearing capacity for improving stake for the ultimate frictional resistance standard value and standard ultimate bearing capacity of soil around pile
The new spiral of answering property is at hole drill tool and bore forming method.
The invention the technical solution adopted is that: a kind of spiral at hole drill tool, including, squeezed by connector, outer tube and spiral
The auxiliary that native blade I forms is at bore portion, and is made of core pipe, spiral soil compaction blade II and drill bit door gear main at hole portion
Point；The core pipe upper end is fixed with outer tube, and drill bit door gear, the outer winding screw soil compaction blade II of core pipe is arranged in lower end, and spiral is squeezed
After native blade II is wrapped in core pipe, the monnolithic case that II outer rim of spiral soil compaction blade is formed is truncated cone.
Further, the spiral is equipped with several earth-retaining soil compaction blocks at hole drill tool, and several earth-retaining soil compaction blocks are mounted on
It is on spiral soil compaction blade II and fixed by core pipe and spiral soil compaction blade II.
Further, after several earth-retaining soil compaction blocks are mounted on spiral soil compaction blade II, it is small to be formed by outer diameter
In the outer diameter with diametrically spiral soil compaction blade II.
Further, the drill bit door gear includes folding group, apex point and brill door；Apex point is fixed on the lower end of core pipe,
It is equipped with U-shaped notch, in apex point two sides, the two secondary doors that bore pass through the lower end that folding group is fixed on core pipe, two secondary brill door closures respectively
U-shaped notch is sealed when state.
Further, the drill bit door gear is equipped with two secondary U-shaped coaming plates, and two secondary U-shaped coaming plates are separately fixed at apex point two
The lower end of side, U-shaped coaming plate upper end and core pipe is fixed, in U-shaped notch is enclosed in by U-shaped coaming plate, bore door outer rim and U-shaped coaming plate
Inner edge matches.
Further, core pipe is cylindricality or truncated cone.
Further, the inside of outer tube and core pipe forms the channel of the perforation poured into for concrete.
Further, the auxiliary is at bore portion, if being equipped with dry joint and several outer tubes, several outer tubes are connected by connector
After together, spiral soil compaction blade I is wrapped on connector and outer tube.
Close in, closely knit gravelly sand, circle gravel, cobble, rubble and strong-weathered rock soil layer, middle weathering soft rockmass soil layer etc.
Hard rock-soil layer, using above-mentioned spiral at hole drill tool, bore forming method is as follows:
1) stake holes position is determined；
2) spiral is connect at hole drill tool with stake mechanomotive force head device and matching pump guncreting equipment, spiral is at hole drill
Has the main apex point align piles hole location at bore portion；
3) power head device for starting spiral Squeezing Soil Pile machine, carries out drilling rotation, release power head device drive spiral at
Hole drill tool moves down, spiral at hole drill tool lower part it is main at bore portion rotary squeezing Rock And Soil direct first to moving radially below
It is dynamic, taper hole is formed, with spiral moving down at hole drill tool, the Rock And Soil of established cone-shaped wall continues to moving radially below,
The aperture of the taper hole of formation constantly expands, until design stake holes diameter；Spiral pore-forming drilling tool rotates in folding process, most of ground
Aperture is directly expressed in downward direction at apex point, the spiral soil compaction blade II of bore portion by main, and small part ground is by main at hole portion
The spiral soil compaction blade II divided squeezes removing and from bottom to top transmits at free state, and along the top-surface camber of spiral soil compaction blade II,
It is main that aperture is pressed to again in downward direction to ground at the spiral soil compaction blade II and core pipe of bore portion in transmit process,
Seldom part ground is sent to auxiliary into bore portion；
4) spiral is assisted into the spiral soil compaction blade I of bore portion and outer tube outer surface at hole drill tool to the ground sent
Continue to squeeze when passing, finally only minimal amount of ground is discharged into the outer earth's surface of stake holes as surflaes；
5) after being drilled into stake holes projected depth, spiral keeps original place to continue to rotate in the same direction at hole drill tool, abundant dense extrusion stake
Bottom hole and stake holes wall ground, while first pumping guncreting pass through pouring into for concrete of being formed of the inside of outer tube and core pipe
Channel to drilling tool bottom end, then the spiral of rotating Vortex is slowly promoted into hole drill tool, under gravity and pressure effect, concrete opening
It bores door and is fed into stake holes bottom from U-shaped notch pressure, Bian Tibian pressure is kept to fill, satisfaction promotes speed and pump pressure fills flux matched degree, up to
Design of pile top absolute altitude completes the process of one-step pore-creating pump guncreting；
6) according to design requirement, suspender slings the steel reinforcement cage being ready for or prefabricated component etc., is inserted into the stake holes being perfused
In, reach designed elevation, mobile stake machine to next pile hole location.
For soft rock-soil layers such as cohesive soil, silt, Extra-fine sand, coarse sand, middle sand, using above-mentioned spiral at hole drill tool,
Bore forming method is as follows:
1) stake holes position is determined；
2) spiral is connect at hole drill tool with stake mechanomotive force head device and matching pump guncreting equipment, spiral is at hole drill
Has the main apex point align piles hole location at bore portion；
3) power head device for starting spiral Squeezing Soil Pile machine, carries out drilling rotation, release power head device drive spiral at
Hole drill tool moves down, spiral at hole drill tool lower part it is main at bore portion rotary squeezing Rock And Soil direct first to moving radially below
It is dynamic, taper hole is formed, with spiral moving down at hole drill tool, the Rock And Soil of established cone-shaped wall continues to moving radially below,
The aperture of the taper hole of formation constantly expands, until design stake holes diameter；Spiral pore-forming drilling tool rotates in folding process, most of ground
Aperture is directly expressed in downward direction at apex point, the spiral soil compaction blade II of bore portion by main, and small part ground is by main at hole portion
The spiral soil compaction blade II divided squeezes removing and from bottom to top transmits at free state, and along the top-surface camber of spiral soil compaction blade II,
It is main that hole is pressed to again to ground at the spiral soil compaction blade II and core pipe and earth-retaining soil compaction block of bore portion in transmit process
Radially below to seldom part ground is sent to auxiliary into bore portion；
4) spiral is assisted into the spiral soil compaction blade I of bore portion and outer tube outer surface at hole drill tool to the ground sent
Continue to squeeze when passing, finally only minimal amount of ground is discharged into the outer earth's surface of stake holes as surflaes；
5) after being drilled into stake holes projected depth, spiral keeps original place to continue to rotate in the same direction at hole drill tool, abundant dense extrusion stake
Bottom hole and stake holes wall ground, while first pumping guncreting pass through pouring into for concrete of being formed of the inside of outer tube and core pipe
Channel to drilling tool bottom end, then the spiral of rotating Vortex is slowly promoted into hole drill tool, under gravity and pressure effect, concrete opening
It bores door and is fed into stake holes bottom from U-shaped notch pressure, Bian Tibian pressure is kept to fill, satisfaction promotes speed and pump pressure fills flux matched degree, up to
Design of pile top absolute altitude completes the process of one-step pore-creating pump guncreting；
6) according to design requirement, suspender slings the steel reinforcement cage being ready for or prefabricated component etc., is inserted into the stake holes being perfused
In, reach designed elevation, mobile stake machine to next pile hole location.
The beneficial effect of the invention is:
1, it is taper structure drilling tool as at the main at bore portion of hole drill tool that the present invention, which uses shape, it is to be by shape
The spiral soil compaction blade II and core pipe and shape of truncated cone are that the drill bit door gear of bullet forms.Directly to stake holes ground into
Downward squeezed of conduct, is first extruded into path taper hole, then squeezed at major diameter taper hole, until stake holes diameter, the soil around pile of institute's pile are compacted
Effect is good, and the effective forced area of bearing course at pile end is big, and pile bearing capacity is strong, in squeezing process, also strips down to extruding
Ground has the function of transmission, efficiently solves the problems, such as the soil compaction negative effect of hard rock-soil layer and at stake holes hardly possible, has energy
Function that is crowded then squeeze, cannot squeezing, pass, and squeeze when passing, soil compaction reasonability are strong.When pore-forming, two, which bore door and apex point etc., forms conelet
Body, it is directly radially lower to ground in stake holes to squeeze, it is empty to significantly reduce the storage that the ground stripped down is squeezed by apex point
Between, prevent adverse effect of the pile pile-end sediment to bearing capacity.By installing earth-retaining soil compaction block, efficiently solve not of the same race
The drilling construction of rock-soil layer expands the use scope of drilling tool of the same race, reduces the manufacturing cost of drilling tool.
2, it is wide to adapt to geological conditions for the invention.The drilling tool penetration capacity of the invention is strong, and pore-forming reasonability is strong, bears
Effect is small, is not influenced by underground water.
3, the invention pile bearing capacity is high.The drilling tool and method soil around pile created through the invention are compacted, limit side
Resistance criteria value and standard ultimate bearing capacity are greatly improved, and consolidation effect is good.
4, the invention is energy-efficient.The invention constructing operation is simple, high-efficient, drilling tool small investment, pile matter
Amount is high, and pile bearing capacity is big, at low cost.
5, the invention is environmentally protective.Few, no mud, no vibration using drilling tool and method the surflaes discharge of the invention
It is dynamic.
Detailed description of the invention
Fig. 1 is that 1 core pipe of embodiment is the spiral of boring door closure state of the circular cone stage body with earth-retaining soil compaction block into hole drill tool
Schematic diagram.
Fig. 2 is that 1 core pipe of embodiment is the spiral of boring door opening state of the circular cone stage body with earth-retaining soil compaction block into hole drill tool
Schematic diagram.
Fig. 3 is apex point structural schematic diagram.
Fig. 4 is apex point, U-shaped coaming plate and brill door connection schematic diagram.
Fig. 5 is that the spiral that 2 core pipe of embodiment is brill door closure state of the cylinder with earth-retaining soil compaction block is illustrated at hole drill tool
Figure.
Fig. 6 is that the spiral that 2 core pipe of embodiment is brill door opening state of the cylinder with earth-retaining soil compaction block is illustrated at hole drill tool
Figure
Fig. 7 be 3 core pipe of embodiment be circular cone stage body without earth-retaining soil compaction block brill door closure state spiral at hole drill
Has schematic diagram.
Fig. 8 be 3 core pipe of embodiment be circular cone stage body without earth-retaining soil compaction block brill door opening state spiral at hole drill
Has schematic diagram.
Fig. 9 is that 3 core pipe of embodiment is that cylinder shows without the spiral of the brill door closure state of earth-retaining soil compaction block at hole drill tool
It is intended to.
Figure 10 is that 3 core pipe of embodiment is that cylinder shows without the spiral of the brill door opening state of earth-retaining soil compaction block at hole drill tool
It is intended to.
Specific embodiment
Embodiment 1.
It is circular cone stage body with earth-retaining soil compaction block the present embodiment provides a kind of main core pipe at bore portion such as Fig. 1-Fig. 4
Spiral is at hole drill tool.
(1) a kind of spiral is at hole drill tool, by assisting into bore portion and main constituting at bore portion.
If assisting into bore portion to be made of dry joint 1, several outer tubes 2 and spiral soil compaction blade I 3.Several outer tubes 2 are by connecing
After first 1 links together, spiral soil compaction blade I 3 is wrapped on connector 1 and outer tube 2, is formed by the outer rim of spiral soil compaction blade I 3
Shape be cylindricality.The connector 1 of the upper end installation of the outer tube 2 of top is for spiral to be connect at hole drill tool with stake mechanomotive force head
Together.The lower end of the outer tube 2 of lowermost end and the main core pipe 4 at bore portion are fixed.Connector 1 can be flange.
It is main to be made of at bore portion core pipe 4, spiral soil compaction blade II 5 and drill bit door gear.
4 upper end of core pipe and outer tube 2 are fixed, form integral structure.Lower end is fixed with drill bit door gear.4 external spiral of core pipe twines
Around spiral soil compaction blade II 5.The present embodiment, core pipe 4 are cone.After spiral soil compaction blade II 5 is wrapped in core pipe 4, by spiral shell
The monnolithic case for revolving the outer rim formation of soil compaction blade II 5 is truncated cone.
Several earth-retaining soil compaction blocks 10 are installed on the top-surface camber of spiral soil compaction blade II 5.Earth-retaining soil compaction block 10 passes through core
Pipe 4 and spiral soil compaction blade II 5 are fixed.The effect of earth-retaining soil compaction block 10 is: in boring procedure, most of ground is by main pore-forming
Partial apex point, spiral soil compaction blade II are directly expressed to aperture in downward direction, and small part ground is by the main spiral at bore portion
Soil compaction blade II squeezes removing and from bottom to top transmits at free state, and along the top-surface camber of spiral soil compaction blade II, is transmitting
Cheng Zhong, ground encounter earth-retaining soil compaction block, are pressed to hole again radially below to ground by the soil compaction face A of earth-retaining soil compaction block
To, make only seldom part ground be sent to auxiliary at bore portion so that the ground for being discharged into earth's surface outside hole is considerably less.
It can be understood that earth-retaining soil compaction block 10 can be fixed on the top-surface camber of core pipe 4 and spiral soil compaction blade II 5,
It can be detachably mounted in core pipe 4 and spiral soil compaction blade II 5.It is formed by outer diameter and is less than with diametrically spiral soil compaction
The outer diameter of blade II 5, that is, earth-retaining soil compaction block 10 outer edge surface on the inside of the outer rim of spiral soil compaction blade II 5, do not lean out spiral shell
Revolve the outer rim of soil compaction blade II 5.
Drill bit door gear includes folding group 6, apex point 7, U-shaped coaming plate 8 and bores door 9.Apex point 7 is fixed on the lower end of core pipe 4,
It is equipped with U-shaped notch 7-1, two secondary U-shaped coaming plates 8 are separately fixed at 7 two sides of apex point, and U-shaped 8 upper end of coaming plate and the lower end of core pipe 4 are solid
Fixed, U-shaped notch 7-1 is enclosed in interior by U-shaped coaming plate 8.In 7 two sides of apex point, it is solid that two secondary one end for boring door 9 pass through folding group 6 respectively
It is scheduled on the lower end of core pipe 4, the other end for boring door 9 can be around 6 Unscrew of folding group.Bore the outer rim of door 9 and the inner edge of U-shaped coaming plate 8
Match.When two secondary brill 9 closed states of door, the inside that U-shaped coaming plate surrounds is screwed in, U-shaped notch 7-1 is sealed, formed with apex point 7
Sealed body structure.
The inside of outer tube 2 and core pipe 4 forms the channel 11 of the perforation poured into for concrete.
(2) a kind of bore forming method
The spiral of the present embodiment at hole drill tool suitable for cohesive soil, silt, Extra-fine sand, coarse sand, the soft rock-soil layer such as sand,
Construction method is as follows:
1) setting-out of engineering pile design position is pressed, determines stake holes position.
2) spiral is connect at hole drill tool with stake mechanomotive force head device and matching pump guncreting equipment, it will be assembled
Screw pile machine and in place at hole drill tool, matching pump guncreting equipment, spiral are aligned at the main apex point at bore portion of hole drill tool
Stake holes position carries out the construction of stake holes.
3) power head device for starting spiral Squeezing Soil Pile machine, carries out drilling rotation, release power head device drive spiral at
Hole drill tool moves down, spiral at hole drill tool lower part it is main at bore portion rotary squeezing Rock And Soil direct first to moving radially below
It is dynamic, path taper hole is formed, with spiral moving down at hole drill tool, the Rock And Soil of established cone-shaped wall continues to moving radially below
Dynamic, path taper hole is by gradually squeezed at major diameter taper hole, until stake holes diameter.During this, most of ground is by main at bore portion
Apex point, spiral soil compaction blade II be directly expressed to aperture in downward direction, small part ground is by the main spiral soil compaction at bore portion
Blade II squeezes removing and from bottom to top transmits at free state, and along the top-surface camber of spiral soil compaction blade II, in transmit process,
It is main that aperture is pressed to again in downward direction to ground at the spiral soil compaction blade II and core pipe and earth-retaining soil compaction block of bore portion, only
There is seldom part ground to be sent to auxiliary into bore portion.
4) spiral is assisted into the spiral soil compaction blade I of bore portion and outer tube outer surface at hole drill tool to the ground sent
Continue to squeeze when passing, finally only minimal amount of ground is discharged into the outer earth's surface of stake holes as surflaes.
5) after being drilled into stake holes projected depth, spiral keeps original place to continue to rotate in the same direction at hole drill tool, abundant dense extrusion stake
Bottom hole and stake holes wall ground, while guncreting is first pumped, it is poured by what the inside of outer tube 2 and core pipe 4 was formed for concrete
Channel 11 to drilling tool bottom end, then slowly promote the spiral of rotating Vortex into hole drill tool, under gravity and pressure effect, concrete
It opens brill door and is fed into stake holes bottom from U-shaped notch 7-1 pressure, Bian Tibian pressure is kept to fill, satisfaction promotes speed and pump pressure fills flux matched
Degree, until design of pile top absolute altitude, completes the process of one-step pore-creating pump guncreting
6) according to design requirement, suspender slings the steel reinforcement cage being ready for or prefabricated component etc., is inserted into the stake holes being perfused
In, reach designed elevation, mobile stake machine to next pile hole location.
The basic principle of the invention pore-forming:
For the big feature of complexity, the compressibility difference of soil around pile, during at stake holes, the drilling tool that is rotating
The main ground that first directly squeezed at bore portion at path taper hole, then it is squeezed at major diameter taper hole, up to stake holes diameter.In crowded process,
Most of ground directly presses to stake holes radially below by apex point, spiral soil compaction blade II, and the ground of rest part is squeezed by spiral
Native blade II squeezes removing and is split into free state, from bottom to top transmits along the top-surface camber for the spiral soil compaction blade II being rotating,
Core tube outer surface, spiral soil compaction blade II and matched earth-retaining soil compaction block press to hole wall again in transmit process, are not pressed against hole
The ground of wall is transmitted to auxiliary on bore portion.The spiral soil compaction blade I and outer tube outer surface for assisting into bore portion will transmit
The ground come is pressed to again at stake holes wall, especially the stake holes wall at the big rock-soil layer of compressibility, the ground meeting being extruded into
It is some more.In entire pore forming process, realization is first extruded into path taper hole, then squeezed at major diameter taper hole, until squeezed pile aperture, can squeeze
The function of then squeezing, cannot squeeze, pass, and squeezed when passing.The physical parameter for improving soil around pile, greatly improves soil around pile
Ultimate frictional resistance standard value and standard ultimate bearing capacity reasonably solve different geology items by adjusting earth-retaining soil compaction block
Lead to the problem of that investment cost is high, and strong at stake holes reasonability, soil compaction negative effect is smaller using a variety of drilling tools under part.
Embodiment 2.
It is the spiral that cylindricality has earth-retaining soil compaction block the present embodiment provides a kind of main core pipe at bore portion such as Fig. 5-Fig. 6
At hole drill tool.Spiral provided in this embodiment is at hole drill tool, by assisting into bore portion and main constituting at bore portion.
If assisting into bore portion to be made of dry joint 1, several outer tubes 2 and spiral soil compaction blade I 3.
It is main to be made of at bore portion core pipe 4, spiral soil compaction blade II 5 and drill bit door gear.
Drill bit door gear includes folding group 6, apex point 7, U-shaped coaming plate 8 and bores door 9.
Equipped with several earth-retaining soil compaction blocks 10.
Assist into that bore portion, the main structure at bore portion and earth-retaining soil compaction block 10 are same as Example 1, and difference is to lead
Cylindrical structure is used at the core pipe 4 of bore portion.
Spiral provided in this embodiment at hole drill tool suitable for cohesive soil, silt, Extra-fine sand, coarse sand, the soft rockmass such as sand
Soil layer, method and the principle for carrying out pile drilling are same as Example 1.
Embodiment 3.
It is circular cone stage body without earth-retaining soil compaction block the present embodiment provides a kind of main core pipe at bore portion such as Fig. 7-Fig. 8
Spiral at hole drill tool.
(1) a kind of spiral is at hole drill tool, by assisting into bore portion and main constituting at bore portion.
If assisting into bore portion to be made of dry joint 1, several outer tubes 2 and spiral soil compaction blade I 3.Several outer tubes 2 are by connecing
After first 1 links together, spiral soil compaction blade I 3 is wrapped on connector 1 and outer tube 2, is formed by the outer rim of spiral soil compaction blade I 3
Shape be cylindricality.The connector 1 of the upper end installation of the outer tube 2 of top is for spiral to be connect at hole drill tool with stake mechanomotive force head
Together.The lower end of the outer tube 2 of lowermost end and the main core pipe 4 at bore portion are fixed.Connector 1 can be flange.
It is main to be made of at bore portion core pipe 4, spiral soil compaction blade II 5 and drill bit door gear.
4 upper end of core pipe and outer tube 2 are fixed, form integral structure.Lower end is fixed with drill bit door gear.4 external spiral of core pipe twines
Around spiral soil compaction blade II 5.The present embodiment, core pipe 4 are cone.After spiral soil compaction blade II 5 is wrapped in core pipe 4, by spiral shell
The monnolithic case for revolving the outer rim formation of soil compaction blade II 5 is truncated cone.
Drill bit door gear includes folding group 6, apex point 7, U-shaped coaming plate 8 and bores door 9.Apex point 7 is fixed on the lower end of core pipe 4,
It is equipped with U-shaped notch 7-1, two secondary U-shaped coaming plates 8 are separately fixed at 7 two sides of apex point, and U-shaped 8 upper end of coaming plate and the lower end of core pipe 4 are solid
Fixed, U-shaped notch 7-1 is enclosed in interior by U-shaped coaming plate 8.In 7 two sides of apex point, it is solid that two secondary one end for boring door 9 pass through folding group 6 respectively
It is scheduled on the lower end of core pipe 4, the other end for boring door 9 can be around 6 Unscrew of folding group.Bore the outer rim of door 9 and the inner edge of U-shaped coaming plate 8
Match.When two secondary brill 9 closed states of door, the inside that U-shaped coaming plate surrounds is screwed in, U-shaped notch 7-1 is sealed, formed with apex point 7
Sealed body structure.
The inside of outer tube 2 and core pipe 4 forms the channel 11 of the perforation poured into for concrete.
(2) a kind of bore forming method
The spiral of the present embodiment at hole drill tool be suitable in close, closely knit gravelly sand, circle gravel, cobble, rubble and strong-weathered rock
Hard rock-soil layer, the construction methods such as soil layer, middle weathering soft rockmass soil layer are as follows:
1) setting-out of engineering pile design position is pressed, determines stake holes position.
2) spiral is connect at hole drill tool with stake mechanomotive force head device and matching pump guncreting equipment, it will be assembled
Screw pile machine and in place at hole drill tool, matching pump guncreting equipment, spiral are aligned at the main apex point at bore portion of hole drill tool
Stake holes position carries out the construction of stake holes.
3) power head device for starting spiral Squeezing Soil Pile machine, carries out drilling rotation, release power head device drive spiral at
Hole drill tool moves down, spiral at hole drill tool lower part it is main at bore portion rotary squeezing Rock And Soil direct first to moving radially below
It is dynamic, path taper hole is formed, with spiral moving down at hole drill tool, the Rock And Soil of established cone-shaped wall continues to moving radially below
Dynamic, path taper hole is by gradually squeezed at major diameter taper hole, until stake holes diameter.During this, most of ground is by main at bore portion
Apex point, spiral soil compaction blade II be directly expressed to aperture in downward direction, small part ground is by the main spiral soil compaction at bore portion
Blade II squeezes removing and from bottom to top transmits at free state, and along the top-surface camber of spiral soil compaction blade II, in transmit process,
It is main that aperture is pressed to again in downward direction to ground at the spiral soil compaction blade II and core pipe of bore portion, only seldom part rock
Soil is sent to auxiliary into bore portion.
4) spiral is assisted into the spiral soil compaction blade I of bore portion and outer tube outer surface at hole drill tool to the ground sent
Continue to squeeze when passing, finally only minimal amount of ground is discharged into the outer earth's surface of stake holes as surflaes.
5) after being drilled into stake holes projected depth, spiral keeps original place to continue to rotate in the same direction at hole drill tool, abundant dense extrusion stake
Bottom hole and stake holes wall ground, while guncreting is first pumped, it is poured by what the inside of outer tube 2 and core pipe 4 was formed for concrete
Channel 11 to drilling tool bottom end, then slowly promote the spiral of rotating Vortex into hole drill tool, under gravity and pressure effect, concrete
It opens brill door and is fed into stake holes bottom from U-shaped notch 7-1 pressure, Bian Tibian pressure is kept to fill, satisfaction promotes speed and pump pressure fills flux matched
Degree, until design of pile top absolute altitude, completes the process of one-step pore-creating pump guncreting
6) according to design requirement, suspender slings the steel reinforcement cage being ready for or prefabricated component etc., is inserted into the stake holes being perfused
In, reach designed elevation, mobile stake machine to next pile hole location.
Embodiment 4.
It is spiral shell of the cylindricality without earth-retaining soil compaction block the present embodiment provides a kind of main core pipe at bore portion such as Fig. 9-Figure 10
Revolve into hole drill tool.Spiral provided in this embodiment is at hole drill tool, by assisting into bore portion and main constituting at bore portion.
If assisting into bore portion to be made of dry joint 1, several outer tubes 2 and spiral soil compaction blade I 3.
It is main to be made of at bore portion core pipe 4, spiral soil compaction blade II 5 and drill bit door gear.
Drill bit door gear includes folding group 6, apex point 7, U-shaped coaming plate 8 and bores door 9.
Bore portion and main same as Example 3 at the structure of bore portion is assisted into, difference is the main core at bore portion
Pipe 4 uses cylindrical structure.
Spiral provided in this embodiment at hole drill tool be suitable in close, closely knit gravelly sand, circle gravel, cobble, rubble and high wind
Change the hard rock-soil layers such as rock-soil layer, middle weathering soft rockmass soil layer, the method for carrying out pile drilling is same as Example 3.
Claims (10)
1. a kind of spiral is at hole drill tool, including, the auxiliary pore-forming being made of connector (1), outer tube (2) and spiral soil compaction blade I (3)
Part, and be made of core pipe (4), spiral soil compaction blade II (5) and drill bit door gear main at bore portion；On the core pipe (4)
End is fixed with outer tube (2), and drill bit door gear, the outer winding screw soil compaction blade II (5) of core pipe (4) is arranged in lower end, it is characterised in that:
After spiral soil compaction blade II (5) is wrapped on core pipe (4), the monnolithic case that II (5) outer rim of spiral soil compaction blade is formed is circular cone
Platform shape.
2. a kind of spiral according to claim 1 is at hole drill tool, which is characterized in that several earth-retaining soil compaction blocks (10) are equipped with,
Several earth-retaining soil compaction blocks (10) are mounted on spiral soil compaction blade II (5) and by core pipe (4) and spiral soil compaction blades II
(5) fixed.
3. a kind of spiral according to claim 2 is at hole drill tool, which is characterized in that several earth-retaining soil compaction block (10) peaces
After on spiral soil compaction blade II (5), it is formed by outer diameter and is less than the outer diameter with diametrically spiral soil compaction blade II (5).
4. a kind of spiral according to claim 1,2 or 3 is at hole drill tool, which is characterized in that the drill bit door gear includes
Folding group (6), apex point (7) and brill door (9)；Apex point (7) is fixed on the lower end of core pipe (4), which is provided with U-shaped notch (7-1)；?
Apex point (7) two sides, the two secondary lower ends bored door (9) and be fixed on core pipe (4) by folding group (6) respectively, two secondary brill door (9) closed forms
U-shaped notch (7-1) is sealed when state.
5. a kind of spiral according to claim 4 is at hole drill tool, which is characterized in that the drill bit door gear is equipped with two secondary U
Type coaming plate (8), two secondary U-shaped coaming plates (8) are separately fixed at apex point (7) two sides, and the lower end of U-shaped coaming plate (8) upper end and core pipe (4) is solid
Calmly, U-shaped notch (7-1) is enclosed in interior by U-shaped coaming plate (8), and the inner edge of the outer rim and U-shaped coaming plate (8) of boring door (9) matches.
6. according to claim 1, a kind of spiral described in 2,3 or 5 is at hole drill tool, which is characterized in that core pipe (4) is cylindricality or circle
Taper type.
7. according to claim 1, a kind of spiral described in 2,3 or 5 is at hole drill tool, which is characterized in that outer tube (2) and core pipe (4)
Inside form the channel (11) of perforation poured into for concrete.
8. according to claim 1, a kind of spiral described in 2,3 or 5 is at hole drill tool, which is characterized in that the auxiliary at bore portion,
If equipped with dry joint (1) and several outer tubes (2), after several outer tubes (2) are linked together by connector (1), spiral soil compaction blade I
(3) it is wrapped on connector (1) and outer tube (2).
9. a kind of bore forming method, which is characterized in that using spiral described in claim 1 at hole drill tool, the method is as follows:
1) stake holes position is determined；
2) spiral is connect at hole drill tool with stake mechanomotive force head device and matching pump guncreting equipment, spiral is at hole drill tool master
At the apex point align piles hole location of bore portion；
3) power head device for starting spiral Squeezing Soil Pile machine, carries out drilling rotation, and release power head device drives spiral at hole drill
Tool moves down, spiral at hole drill tool lower part it is main at bore portion rotary squeezing Rock And Soil direct first to moving radially below,
Taper hole is formed, with spiral moving down at hole drill tool, the Rock And Soil of established cone-shaped wall continues to be formed to moving radially below
The aperture of taper hole constantly expand, until design stake holes diameter；Spiral pore-forming drilling tool rotates in folding process, and most of ground is led
Aperture is directly expressed in downward direction at the apex point of bore portion, spiral soil compaction blade II, and small part ground is by main at bore portion
Spiral soil compaction blade II squeezes removing and from bottom to top transmits at free state, and along the top-surface camber of spiral soil compaction blade II, is passing
It is main that aperture is pressed to again in downward direction to ground at the spiral soil compaction blade II and core pipe of bore portion during sending, seldom
Part ground is sent to auxiliary into bore portion；
4) spiral assists continuing the ground sent at the spiral soil compaction blade I and outer tube outer surface of bore portion at hole drill tool
Squeeze when passing, finally only minimal amount of ground is discharged into the outer earth's surface of stake holes as surflaes；
5) after being drilled into stake holes projected depth, spiral keeps original place to continue to rotate in the same direction at hole drill tool, abundant dense extrusion stake holes bottom
With stake holes wall ground, while guncreting is first pumped, passes through the channel poured into for concrete that the inside of outer tube and core pipe is formed
To drilling tool bottom end, then the spiral of rotating Vortex is slowly promoted into hole drill tool, under gravity and pressure effect, concrete, which is opened, bores door
It is fed into stake holes bottom from U-shaped notch pressure, Bian Tibian pressure is kept to fill, meets promotion speed and pump pressure fills flux matched degree, until stake top
Designed elevation completes the process of one-step pore-creating pump guncreting；
6) according to design requirement, suspender slings the steel reinforcement cage or prefabricated component being ready for, and is inserted into the stake holes being perfused, up to setting
Count absolute altitude, mobile stake machine to next pile hole location.
10. a kind of bore forming method, which is characterized in that using spiral described in Claims 2 or 33 at hole drill tool, method is such as
Under:
1) stake holes position is determined；
2) spiral is connect at hole drill tool with stake mechanomotive force head device and matching pump guncreting equipment, spiral is at hole drill tool master
At the apex point align piles hole location of bore portion；
3) power head device for starting spiral Squeezing Soil Pile machine, carries out drilling rotation, and release power head device drives spiral at hole drill
Tool moves down, spiral at hole drill tool lower part it is main at bore portion rotary squeezing Rock And Soil direct first to moving radially below,
Taper hole is formed, with spiral moving down at hole drill tool, the Rock And Soil of established cone-shaped wall continues to be formed to moving radially below
The aperture of taper hole constantly expand, until design stake holes diameter；Spiral pore-forming drilling tool rotates in folding process, and most of ground is led
Aperture is directly expressed in downward direction at the apex point of bore portion, spiral soil compaction blade II, and small part ground is by main at bore portion
Spiral soil compaction blade II squeezes removing and from bottom to top transmits at free state, and along the top-surface camber of spiral soil compaction blade II, is passing
During sending, main spiral soil compaction blade II and core pipe and earth-retaining soil compaction block at bore portion is pressed to hole radial direction to ground again
Lower direction, seldom part ground are sent to auxiliary into bore portion；
4) spiral assists continuing the ground sent at the spiral soil compaction blade I and outer tube outer surface of bore portion at hole drill tool
Squeeze when passing, finally only minimal amount of ground is discharged into the outer earth's surface of stake holes as surflaes；
5) after being drilled into stake holes projected depth, spiral keeps original place to continue to rotate in the same direction at hole drill tool, abundant dense extrusion stake holes bottom
With stake holes wall ground, while guncreting is first pumped, passes through the channel poured into for concrete that the inside of outer tube and core pipe is formed
11 to drilling tool bottom end, then slowly promotes the spiral of rotating Vortex into hole drill tool, and under gravity and pressure effect, concrete, which is opened, to be bored
Door is fed into stake holes bottom from U-shaped notch pressure, and Bian Tibian pressure is kept to fill, and satisfaction promotes speed and pump pressure fills flux matched degree, up to stake
Designed elevation is pushed up, the process of one-step pore-creating pump guncreting is completed；
6) according to design requirement, suspender slings the steel reinforcement cage or prefabricated component being ready for, and is inserted into the stake holes being perfused, up to setting
Count absolute altitude, mobile stake machine to next pile hole location.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910135952.7A CN109723393A (en) | 2019-02-25 | 2019-02-25 | A kind of spiral is at hole drill tool and bore forming method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910135952.7A CN109723393A (en) | 2019-02-25 | 2019-02-25 | A kind of spiral is at hole drill tool and bore forming method |
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| CN109723393A true CN109723393A (en) | 2019-05-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110219597A (en) * | 2019-06-25 | 2019-09-10 | 刘守进 | A kind of spiral soil compaction guncreting pile drilling rig and spiral soil compaction guncreting pile method for constructing foundation pile |
| CN110410013A (en) * | 2019-08-21 | 2019-11-05 | 刘守进 | A kind of spiral soil compaction drill bit device and its method for constructing foundation pile that torsion is closed the door |
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| CN101029559A (en) * | 2007-04-13 | 2007-09-05 | 中国京冶工程技术有限公司 | Long-spiral replaceable and extruded borehole construction |
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| CN110219597A (en) * | 2019-06-25 | 2019-09-10 | 刘守进 | A kind of spiral soil compaction guncreting pile drilling rig and spiral soil compaction guncreting pile method for constructing foundation pile |
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| CN110410013B (en) * | 2019-08-21 | 2024-05-03 | 刘守进 | Spiral soil-squeezing drill bit device with torsion door closing function and foundation pile construction method thereof |
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Application publication date: 20190507 |