CN110094169A - A kind of threaded pile drill stem for reinforcing local mud and the ground screw pile forming method comprising mud - Google Patents
A kind of threaded pile drill stem for reinforcing local mud and the ground screw pile forming method comprising mud Download PDFInfo
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- CN110094169A CN110094169A CN201910345128.4A CN201910345128A CN110094169A CN 110094169 A CN110094169 A CN 110094169A CN 201910345128 A CN201910345128 A CN 201910345128A CN 110094169 A CN110094169 A CN 110094169A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 19
- 238000005553 drilling Methods 0.000 claims abstract description 105
- 239000007921 spray Substances 0.000 claims abstract description 47
- 239000004567 concrete Substances 0.000 claims abstract description 24
- 238000005507 spraying Methods 0.000 claims abstract description 24
- 239000002689 soil Substances 0.000 claims description 30
- 238000002347 injection Methods 0.000 claims description 26
- 239000007924 injection Substances 0.000 claims description 26
- 238000013461 design Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 3
- 230000002441 reversible effect Effects 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000010412 perfusion Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000010410 reperfusion Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- 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
- E02D5/56—Screw piles
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/18—Pipes provided with plural fluid passages
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/22—Rods or pipes with helical structure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Fluid Mechanics (AREA)
- Paleontology (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Geophysics (AREA)
- Piles And Underground Anchors (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Earth Drilling (AREA)
Abstract
A kind of ground screw pile forming method the invention discloses threaded pile drill stem for reinforcing local mud and comprising mud, drilling rod shaft surface has screw thread, internal axis filling cavity up and down, drilling rod top rotation connection whirl spraying drilling tool current divider, drilling rod top shaft is socketed dynamic equipment, upper section opens up the pulvis ring cavity and air ring cavity concentric with filling cavity in the drilling rod, corresponding connection drilling rod filling cavity is set in whirl spraying drilling tool current divider, pulvis ring cavity, the channel of air ring cavity, entrance is respectively used to be correspondingly connected with high pressure fluidised form concrete pump outside each channel, high pressure pulvis pump, pressure-air pump, shaft circumferential surface in the middle part of the drilling rod sets the radial nozzles at a circle interval, nozzle face is in the center pulvis spray orifice outer ring air jet orifices of same heart shaped, pulvis spray orifice is connected to pulvis ring cavity, air jet orifices are connected to air ring cavity.Mud sandwich of layers is reinforced in pore-forming with this drill rod special, forms integrally-built Screw Pile.
Description
Technical field
The present invention relates to civil engineering pile-formation process technical fields, more specifically, it relates to a kind of reinforcing part mud
The threaded pile drill stem of layer and ground screw pile forming method comprising mud.
Background technique
Screw Pile and its pile forming method are on the basis of long screw auger drilling deposited pile and Japanese steel flat flanges full thread prefabricated pile
On new pile-type, that it changes the mode to interact between stake and the soil body, stake constitutes mechanical type with Soil Interface and is engaged, will be normal
The reason of " screw is more secured than nail " is used in pile driving construction in knowledge, is achieved its stronger feature.Screw pile
Body surface is threaded, is to be formed by the drill rod special rotary squeezing periphery soil body with thread, nothing or a little soil are discharged, after making
The stake soil that phase is formed has preferable extruding force to engage, better than Reperfu- sion pile body after common filling pile rotary digging soil.National house and city
" Screw Pile technical regulation " JGJ/T379-2016 of the Ministry of Construction, township publication, is Screw Pile stem technical regulation, the pile-type and common
Bored concrete pile compares cost-saved 30%, is modern more advanced pile-type, is now promoting and applying.
In construction using the specific stub machine for having simultaneous techniques, one spiral shell of the synchronous decline of every revolution at the uniform velocity lower brill
Away from forming screw thread in the soil body, stop to bore after drilling to completion；When at the uniform velocity mentioning brill, drilling rod reversely rotates a circle, synchronizes
A screw pitch is risen, while being pumped the concrete curing pile of fluidised form.
Foundation soil possession ball surface layer ground is the physical chemistry and biological effect by nature complexity and is formed, geology
The case where layer distributed is generally presented in surveys, and Pile Foundations Design is to make hard stratum in an end insertion ground, with ground to stake end
Resistance and pile body bearing capacity of the side friction as pile foundation, if there is the higher muddy soft soil layer of water content at middle part, not only
Drilling rod edge concrete disintegration is distributed in mud when the construction stage being pumped chutable concrete, concrete pile body occurs at this
Partial density is loose, pump pressure amount be difficult to control, existing mixing pile be prevent to disperse by mud off or immersed tube, but for
Screw Pile can not take this two kinds of measures；And the higher muddy soft soil layer of this partially aqueous amount is to concrete-pile after molding
Side friction influence very little, even if stake side be shape of threads can not provide well the carrying to stake contribution.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of reinforcing to solve the above problems part
The threaded pile drill stem of mud, can operate with the ground screw pile forming comprising mud, and when pore-forming reinforces mud sandwich of layers
To form threaded walls, while providing the ground screw pile forming method comprising mud.
To achieve the above object, the present invention provides the following technical scheme that
A kind of threaded pile drill stem for reinforcing local mud, including drilling rod, whirl spraying drilling tool current divider, dynamic equipment, drilling rod shaft table
Face has screw thread, and filling cavity, the rotation of drilling rod top connect whirl spraying drilling tool current divider, drilling rod top shaft to internal axis up and down
It is socketed dynamic equipment, upper section opens up the pulvis ring cavity and air ring cavity concentric with filling cavity in the drilling rod, and whirl spraying drilling tool shunts
The channel of corresponding connection drilling rod filling cavity, pulvis ring cavity, air ring cavity is set in device, entrance is respectively used to be correspondingly connected with outside each channel
High pressure fluidised form concrete pump, high pressure pulvis pump, pressure-air pump, and the shaft circumferential surface in the middle part of the drilling rod sets the radial direction at a circle interval
Nozzle, nozzle face are in the center pulvis spray orifice outer ring air jet orifices of same heart shaped, and pulvis spray orifice is connected to pulvis ring cavity, air spray
Hole is connected to air ring cavity.
It is that the pulvis ring cavity of upper section first divides with air ring cavity on top in drilling rod that the present invention, which is further improved technical solution,
Road direction shaft circumferential surface radially extends center pulvis through-hole outer ring air hole concentrically, turns again to extend vertically downward, with
The nozzle of lower section is connected to.It is advanced by the through-hole of small volume, finally the jet power at nozzle is stronger.
The further improved technology scheme of the present invention is to set a signal line passage, signal line passage by side wall in filling cavity
Signal cable is inside installed, signal cable bottom end is connect with the pressure sensor of drilling rod bottom, and top passes through whirl spraying drilling tool current divider
The cable passage inside set is connect with external pressure signal output.Pressure sensor surveys pressure in real time in boring procedure, is convenient for root
Appropriate operation is carried out according to actual condition.
Further improved technology scheme is the present invention, and there are apart from gap, spray for the peripheral wall of spray nozzle front end and drilling rod shaft
Mouth front end is recessed in shaft peripheral wall.First is that drilling rod wall wall surface in backspin cuts the soil body, the outer country rock of drilling rod can be further prevented
Native extruding jet nozzle blocks spray orifice；Second is that high-pressure injection pulvis and air, which can pass rapidly through loosened soil in gap, hits the outer ground of wall, with
Reach the spray penetration of design.
Further improved technology scheme is the present invention, and the center pulvis spray orifice of nozzle is horizontally disposed, outer ring air jet orifices
It is tilted from back to front to center.Air jet orifices spray air to center of orifices axis to inclination, spray with the pulvis that centre bore sprays
Fluidic vectoring thrust interferes with each other, and can enable to spray pulvis and the uniform mix of water-soil.
Further improved technology scheme is the present invention, and drilling rod bottom is in reverse taper, including bar bottom end and blocks perfusion
The valve deck of chamber sets cable passage in valve deck, the drill bit that the pressure sensor connected on valve deck is formed.Drilling rod bottom is integral into back taper
Shape, valve deck design in the conical surface, will not form loosened soil in foot of hole, the pile and ground attachment force after pile are stronger.
Further improved technology scheme is the present invention, and one side shaft side wall of bar bottom end filling cavity excavates notch, valve deck
One side top is hinged in notch, and valve deck another side sets convex clip platform, and convex clip platform is connected to bar bottom end filling cavity another side bottom and opens
If card slot in.When mentioning brill pump pressure concrete, valve deck is opened under impact, and structure is simple and good operability.
The present invention also provides the ground screw pile forming methods comprising mud, use any of claim 1 to 7
The threaded pile drill stem for reinforcing local mud carries out operation, comprising the following steps:
(1) drilling rod bottom valve deck is closed；
(2) start dynamic equipment, bore precession slowly at the ground to pile, creep into a screw pitch for each revolution；
It (3) is h1 from earth's surface to mud upper surface depth, earth's surface to mud bottom surface depth is h2, and the nozzle of drilling rod extremely bores
The distance of head is h, and when drilling is to h1+h, starting high pressure pulvis pump is pumped with pressure-air, makes high pressure pulvis, pressure-air difference
It is corresponding that pulvis ring cavity, air ring cavity are entered by outer entrance on whirl spraying drilling tool current divider, until nozzle sprays；When drilling is to h2+h
Stop injection；Drilling proceeds to projected depth and stops boring；
(4) brill is mentioned after mud initial set reaches preset fastening strength, while starts high pressure fluidised form concrete pump and passes through whirl spraying
Outer inlet pump enters chutable concrete on drilling tool current divider；Drilling process should remain a constant speed, drilling rod reversely rotate one circle should simultaneously on
Rise a screw pitch；
(5) pump pressure concrete reaches designed elevation and stops pump pressure, and when drill bit lift-off earth's surface stops boring.
The present invention is further improved scheme, and the drill bit of drilling rod bottom end is pressure sensor, when drill pressure sensor values
When reaching the larger mud weak soil value of water content that static sounding in geological exploration data measures, turn by the drilling rod of injection design
Speed, injection pressure, the amount of injection carry out injection reinforcement operation, and rod rotation speed is less than former revolving speed, and 0-7r/min sprays pressure 10-
20Mpa, the amount of injection is according to factor designs calculated values such as the different water content of mud soil property, thickness, spray penetrations.Current existing skill
Art it is not intended that layering soil property the similarities and differences, all take same detail design parameter, hierarchical design of the present invention has carried out good silt
Mud layer consolidation effect.
The present invention is further improved scheme, in step (3) when drilling is to h1+h-0.5 meter, starting high pressure pulvis pump and
Pressure-air pump, make high pressure pulvis, pressure-air respectively correspond by outer entrance on whirl spraying drilling tool current divider enter pulvis ring cavity,
Air ring cavity, until nozzle sprays；Stop spraying when drilling is to h2+h+0.5 meter.Respectively increase by 0.5 meter up and down in silt soil strata
Longitudinal spray distance be to have later period molding screw thread pile body spiro tooth part point all continuous higher to be connected with upper and lower soil layer
Pile Soil bite force.
The invention has the advantages that:
One, the application, which sprays reinforcing, is carried out in mud soft soil foundation, and surrounding medium is water and soil, although drilling rod nozzle
Place has very big injection pressure, and still quickly, cutting range is smaller for decaying, in order to expand the reinforcing scope of injection pulvis,
Coaxially increase air jet orifices around the center pulvis spray orifice of nozzle, a cricoid gas injection ring is formed, when the two is sprayed simultaneously
When penetrating, forming the protective film of air again around central-injection stream can when this injection method sprays in liquid medium
The decaying for reducing injection pressure is allowed to as close possible to Decay Rate when spraying in air, to expand radius of spray；
Another air jet orifices spray air to center of orifices axis to inclination, and the pulvis injection stream formation sprayed with centre bore interferes with each other,
It can enable to spray pulvis and the uniform mix of water-soil.
Two, the application newly creates brill gunite, and existing perfusion technique is all when promoting drilling rod from drilling rod tip pump pressure flow
State concrete can isolate in the chutable concrete of mud pump pressure and be distributed in mud, it is close in this section concrete pile body occur
Loose problem is spent, and is more difficult to form screw thread.The present invention has one in view of pulvis sprays into the higher muddy soft soil of water content
Fixed setting time, and in lower brill whirl spraying pulvis to mention bore pump pressure concrete to the spray position have certain time, when applying this
Between section be condense reinforcing body more preferably, with guarantee pump pressure chutable concrete under a certain pressure pump note it is closely knit, formation screw thread pile cutoff.
Three, the drill bit of drilling rod uses pressure sensor, ground layered structure can be detected in drilling, with geological exploration data
The larger muddy soft soil value of this layer of water content that middle static sounding measures is compared, verifies, and drilling depth operation is controllable.And such as
Fruit piling base and early period detect and wrong can also flexibly cope with.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is Section A-A schematic diagram in Fig. 1；
Fig. 3 is section B-B schematic diagram in Fig. 1；
Fig. 4 is nozzle vertical cross-section schematic diagram；
Fig. 5 is drilling rod bottom substance schematic diagram when valve deck is closed；
Fig. 6 is drilling rod bottom substance schematic diagram when valve deck is opened；
Fig. 7 is bore operation schematic diagram.
Specific embodiment
As shown in Figures 1 to 6, a kind of threaded pile drill stem for reinforcing local mud of the present invention, including drilling rod 1, rotation
Drilling tool current divider 2, dynamic equipment 3 are sprayed, 1 shaft surface of drilling rod has screw thread 11, internal axis filling cavity 12 up and down, drilling rod 1
Top rotation connection whirl spraying drilling tool current divider 2,1 top shaft of drilling rod are socketed dynamic equipment 3, and upper section is opened up and filled in the drilling rod 1
Chamber 12 concentric pulvis ring cavity 13 and air ring cavity 14 are infused, corresponding connection drilling rod filling cavity, powder are set in whirl spraying drilling tool current divider 2
Agent ring cavity, air ring cavity channel (i.e. filling cavity channel 22, pulvis ring cavity channel 23, air ring cavity channel 24) enter outside each channel
Mouth is respectively used to be correspondingly connected with high pressure fluidised form concrete pump, high pressure pulvis pump, pressure-air pump (each high-pressure pump is not shown in the figure),
The pulvis ring cavity 13 of upper section and air ring cavity 14 radially extend in concentrically in top elder generation branch to shaft circumferential surface in drilling rod
131 outer ring air hole 141 of heart pulvis through-hole turns again to extend to middle part vertically downward, the shaft circumferential surface at 1 middle part of drilling rod
If the radial nozzles 15 of a circle uniformly at intervals, 15 end face of nozzle are in the 151 outer ring air jet orifices of center pulvis spray orifice of same heart shaped
152, pulvis ring cavity 13, air ring cavity 14 center pulvis through-hole 131 outer ring air hole 141 and lower section nozzle pulvis spray orifice
151, air jet orifices 152 are connected to.
A signal line passage 16 is set by side wall in filling cavity 12, installs signal cable, signal cable in signal line passage 16
Bottom end is connect with the pressure sensor 4 of drilling rod bottom, and top passes through the cable passage 25 set in whirl spraying drilling tool current divider and outside
The connection of pressure signal delivery outlet.
For the peripheral wall of the spray nozzle front end and drilling rod shaft there are apart from gap 17, spray nozzle front end is recessed in shaft peripheral wall.Spray
The center pulvis spray orifice 151 of mouth is horizontally disposed, and outer ring air jet orifices 152 are tilted to center from back to front.
1 bottom of drilling rod sets cable in valve deck 5 including bar bottom end 18 and the valve deck 5 for blocking filling cavity in reverse taper
Channel, the drill bit that the pressure sensor 4 connected on valve deck is formed.One side shaft side wall of 18 filling cavity of bar bottom end excavates notch
181,5 one side top of valve deck sets connecting rod 51 and is hinged in notch 181 by shaft, and 5 another side of valve deck sets convex clip platform 52, convex clip
Platform 52 is connected in the card slot 182 that bar bottom end filling cavity another side bottom opens up.
Ground screw pile forming method comprising mud, operation is carried out using above-mentioned threaded pile drill stem, as shown in Figure 7:
(1) drilling rod bottom valve deck is closed；
(2) start dynamic equipment, bore precession slowly at the ground to pile, creep into a screw pitch for each revolution；
It (3) is h1 from earth's surface to mud upper surface depth, earth's surface to mud bottom surface depth is h2, and the nozzle of drilling rod extremely bores
The distance of head is h, and when drilling is to h1+h-0.5 meter, starting high pressure pulvis pump is pumped with pressure-air, makes high pressure pulvis, high pressure sky
Gas, which is respectively corresponded, enters pulvis ring cavity, air ring cavity by outer entrance on whirl spraying drilling tool current divider, until nozzle sprays, the powder being pumped into
Agent is to reinforce pulvis<such as GB175 " common portland cement ", " special cement ">and rapid hardening pulvis<such as national Chinese Academy of Sciences's recommendation
Can rapid hardening early strong " alkali-free, low alkali, alkaline accelerator " mixture, volume be reinforce pulvis quality 2.5-6% >, in advance uniformly
It is used in mixed way, without being mixed in the soil body；It reinforces pulvis and rapid hardening pulvis is met water and just solidified, there is certain continue in jet pipe
Time condenses obstruction spray road without consideration；Stop spraying when drilling is to h2+h+0.5 meter；Drilling proceeds to projected depth and stops
It bores；
(4) brill is mentioned after mud initial set reaches preset fastening strength, while starts high pressure fluidised form concrete pump and passes through whirl spraying
Outer inlet pump enters chutable concrete on drilling tool current divider；Drilling process should remain a constant speed, drilling rod reversely rotate one circle should simultaneously on
Rise a screw pitch；
(5) pump pressure concrete reaches designed elevation and stops pump pressure, and when drill bit lift-off earth's surface stops boring.
Since the drill bit of drilling rod bottom end is pressure sensor, when drill pressure sensor values reaches quiet in geological exploration data
When the larger mud weak soil value of the water content that power feeler inspection measures, carried out by the rod rotation speed of injection design, injection pressure, the amount of injection
Reinforcement operation is sprayed, rod rotation speed is less than former revolving speed, and 0-7r/min sprays pressure 10-20Mpa, and the amount of injection is according to mud soil property
The factor designs calculated value such as different water content, thickness, spray penetration.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of threaded pile drill stem for reinforcing local mud, including drilling rod (1), whirl spraying drilling tool current divider (2), dynamic equipment (3),
Drilling rod (1) shaft surface has screw thread (11), and internal axis up and down revolve by filling cavity (12), the rotation connection of drilling rod (1) top
It sprays drilling tool current divider (2), drilling rod (1) top shaft is socketed dynamic equipment (3), it is characterised in that: the interior upper section of the drilling rod (1) opens up
The pulvis ring cavity (13) and air ring cavity (14) concentric with filling cavity (12), whirl spraying drilling tool current divider (2) is interior to set corresponding connection
The channel of drilling rod filling cavity, pulvis ring cavity, air ring cavity, entrance is respectively used to be correspondingly connected with high pressure chutable concrete outside each channel
Pump, high pressure pulvis pump, pressure-air pump, and the shaft circumferential surface in the middle part of the drilling rod (1) sets the radial nozzles (15) at a circle interval, spray
Mouth (15) end face is in center pulvis spray orifice (151) outer ring air jet orifices (152) of same heart shaped, pulvis spray orifice (151) and pulvis ring
Chamber (13) connection, air jet orifices (152) are connected to air ring cavity (14).
2. a kind of threaded pile drill stem for reinforcing local mud according to claim 1, it is characterised in that: upper section in drilling rod
Pulvis ring cavity (13) and air ring cavity (14) in top elder generation branch radially extend center pulvis concentrically to shaft circumferential surface
Through-hole (131) outer ring air hole (141), turns again to extend vertically downward, is connected to the nozzle (15) of lower section.
3. a kind of threaded pile drill stem for reinforcing local mud according to claim 1, it is characterised in that: filling cavity (12)
It is interior to set a signal line passage (16) by side wall, signal cable, signal cable bottom end and drilling rod bottom are installed in signal line passage (16)
The pressure sensor (4) in portion connects, and top passes through the cable set in whirl spraying drilling tool current divider and leads to (25) road and external pressure signal
Delivery outlet connection.
4. a kind of threaded pile drill stem for reinforcing local mud according to claim 1, it is characterised in that: spray nozzle front end with
For the peripheral wall of drilling rod shaft there are apart from gap (17), spray nozzle front end is recessed in shaft peripheral wall.
5. a kind of threaded pile drill stem for reinforcing local mud according to claim 1, it is characterised in that: the center of nozzle
Pulvis spray orifice (151) is horizontally disposed, and outer ring air jet orifices (152) are tilted to center from back to front.
6. a kind of threaded pile drill stem for reinforcing local mud according to claim 1, it is characterised in that: drilling rod (1) bottom
Portion is in reverse taper, including bar bottom end (18) and blocks the valve deck (5) of filling cavity, and valve deck (5) is interior to set cable passage, connects on valve deck
The drill bit that the pressure sensor (4) connect is formed.
7. a kind of threaded pile drill stem for reinforcing local mud according to claim 6, it is characterised in that: bar bottom end (18)
One side shaft side wall of filling cavity excavates notch (181), and valve deck (5) one side top sets connecting rod (51) and is hinged on notch (181)
Interior, valve deck (5) another side is set convex clip platform (52), and convex clip platform (52) is connected to the card slot that bar bottom end filling cavity another side bottom opens up
(182) in.
8. including the ground screw pile forming method of mud, which is characterized in that use any reinforcing of claim 1 to 7
The threaded pile drill stem of local mud carries out operation, comprising the following steps:
(1) drilling rod bottom valve deck is closed；
(2) start dynamic equipment, bore precession slowly at the ground to pile, creep into a screw pitch for each revolution；
It (3) is h1 from earth's surface to mud upper surface depth, earth's surface to mud bottom surface depth is h2, and the nozzle of drilling rod extremely bores
The distance of head is h, and when drilling is to h1+h, starting high pressure pulvis pump is pumped with pressure-air, makes high pressure pulvis, pressure-air difference
It is corresponding that pulvis ring cavity, air ring cavity are entered by outer entrance on whirl spraying drilling tool current divider, until nozzle sprays；When drilling is to h2+h
Stop injection；Drilling proceeds to projected depth and stops boring；
(4) brill is mentioned after mud initial set reaches preset fastening strength, while starts high pressure fluidised form concrete pump and passes through whirl spraying
Outer inlet pump enters chutable concrete on drilling tool current divider；Drilling process should remain a constant speed, drilling rod reversely rotate one circle should simultaneously on
Rise a screw pitch；
(5) pump pressure concrete reaches designed elevation and stops pump pressure, and when drill bit lift-off earth's surface stops boring.
9. the ground screw pile forming method according to claim 8 comprising mud, it is characterised in that: drilling rod bottom end
Drill bit is pressure sensor, when to reach the water content that static sounding in geological exploration data measures larger for drill pressure sensor values
When mud weak soil value, injection reinforcement operation, rod rotation speed are carried out by the rod rotation speed of injection design, injection pressure, the amount of injection
Less than former revolving speed, 0-7r/min sprays pressure 10-20Mpa, and the amount of injection is according to the different water content of mud soil property, thickness, injection
The factor designs calculated value such as depth.
10. the ground screw pile forming method according to claim 8 comprising mud, it is characterised in that: in step (3)
When drilling is to h1+h-0.5 meter, starting high pressure pulvis pump and pressure-air pump respectively correspond high pressure pulvis, pressure-air logical
It crosses outer entrance on whirl spraying drilling tool current divider and enters pulvis ring cavity, air ring cavity, until nozzle sprays；When drilling is to h2+h+0.5 meters
Stop injection.
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| CN110847181A (en) * | 2019-11-15 | 2020-02-28 | 广东地山基础工程有限公司 | Rotary spraying reinforcement spray head, reinforcement device while drilling comprising same and construction method |
| CN115354653A (en) * | 2022-08-17 | 2022-11-18 | 江苏淮阴水利建设有限公司 | Construction method for weakening or eliminating soil squeezing stress of tubular pile |
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| CN115354653A (en) * | 2022-08-17 | 2022-11-18 | 江苏淮阴水利建设有限公司 | Construction method for weakening or eliminating soil squeezing stress of tubular pile |
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| CN110094169B (en) | 2020-08-21 |
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Application publication date: 20190806 Assignee: Jiangsu Anfa Construction Co., Ltd Assignor: HUAIYIN INSTITUTE OF TECHNOLOGY Contract record no.: X2020980007583 Denomination of invention: A kind of thread pile drill pipe for reinforcing local silt layer and its pile forming method Granted publication date: 20200821 License type: Common License Record date: 20201105 |