CN109577893A - Borehole cleaning method for the big partial size sediment in priming concrete pile hole bottom - Google Patents
Borehole cleaning method for the big partial size sediment in priming concrete pile hole bottom Download PDFInfo
- Publication number
- CN109577893A CN109577893A CN201811527498.1A CN201811527498A CN109577893A CN 109577893 A CN109577893 A CN 109577893A CN 201811527498 A CN201811527498 A CN 201811527498A CN 109577893 A CN109577893 A CN 109577893A
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- concrete pile
- pile hole
- sediment
- blade
- ventilation duct
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- 239000013049 sediment Substances 0.000 title claims abstract description 63
- 230000037452 priming Effects 0.000 title claims abstract description 40
- 238000004140 cleaning Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000009423 ventilation Methods 0.000 claims abstract description 37
- 238000004062 sedimentation Methods 0.000 claims abstract description 16
- 239000002002 slurry Substances 0.000 claims abstract description 8
- 238000010276 construction Methods 0.000 claims abstract description 5
- 238000005452 bending Methods 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 7
- 238000007664 blowing Methods 0.000 abstract description 6
- 230000002708 enhancing effect Effects 0.000 abstract description 3
- 238000010926 purge Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Classifications
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/16—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using gaseous fluids
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Cleaning In General (AREA)
Abstract
The present invention relates to the technical fields of the borehole cleaning of priming concrete pile hole bottom sediment, disclose the borehole cleaning method for the big partial size sediment in priming concrete pile hole bottom, provide borehole cleaning equipment, borehole cleaning equipment includes conduit, ventilation duct is placed in the inside of conduit, and the top of ventilation duct connects air compressor machine, and the bottom of ventilation duct has air outlet, the air outlet of ventilation duct is connected with rotary head, and the periphery of the lower end of rotary head is provided with multiple blades；Including following construction procedure: 1), placing conduit in priming concrete pile hole；2) ventilation duct, is placed in the inside of conduit, the top connection air compressor machine of ventilation duct and toward blowing inside ventilation duct；3), start the air compressor machine；4), blade rotates, and the sediment mixing slurry of driving priming concrete pile hole bottom drains into sedimentation basin；5), the pure mud on sedimentation basin top is back to inside priming concrete pile hole；By installing blade on ventilation duct, increase the driving force of air blowing, it is more practical and efficient to clear up thicker, greater particle size sediment for the driving force of enhancing purging sediment.
Description
Technical field
The invention patent relates to the technical fields of the borehole cleaning of priming concrete pile hole bottom sediment, in particular to for bored concrete pile
The borehole cleaning method of the big partial size sediment of bottom hole.
Background technique
Bored concrete pile, which refers to, to be formed in foundation soil in engineering site by means such as machine drilling, steel pipe soil compaction or manpower excavations
Stake holes, and steel reinforcement cage, concrete perfusion and the stake being made into are placed in it, however in the construction process, priming concrete pile hole bottom has
Sediment accumulation is had, and bottom hole sediment can impact the bearing capacity of bored concrete pile, and therefore, it is necessary to by drill pile hole bottom grain stillage
It removes clean.
Currently, generally using gas lift reverse circulation borehole cleaning during cast-in-situ bored pile borehole cleaning, this method is to utilize high-pressure blast
Pipe send compressed air to the steel pipe of bored concrete pile aperture, sprays from the mixer of steel pipe bottom, and gas and mud formation density are light
Mixture constantly float in hole, and then drive the mud overflow to aperture sedimentation basin containing sediment in, the sediment in sedimentation basin
After being precipitated, remaining pure mud is returned in drilling, constantly recycles, and achievees the purpose that remove sediment in mud.
In the prior art, in the scale removal process of priming concrete pile hole bottom sediment, smaller or lighter sediment can only be cleared up, for
The sediment of bottom hole greater particle size and thicker sediment inconvenience cleaning, especially quiescent time is longer, part hardenedization
Sediment is more difficult to clear up.
Summary of the invention
The purpose of the present invention is to provide the borehole cleaning methods for the big partial size sediment in priming concrete pile hole bottom, it is intended to solve existing skill
In art, the problem of the sediment of priming concrete pile hole bottom greater particle size, thicker sediment and the hardened sediment inconvenience cleaning in part.
The invention is realized in this way the borehole cleaning method for the big partial size sediment in priming concrete pile hole bottom, including following construction step
It is rapid:
1) conduit, is placed in priming concrete pile hole, the lower end of the conduit has stirring entrance, and the conduit, which has, to be extended
Extended segment above the priming concrete pile hole out, the extended segment have outlet；
2) ventilation duct, is placed in the inside of the conduit, the top of the ventilation duct connects air compressor machine, and the air compressor machine is past
It blows inside the ventilation duct；The bottom of the ventilation duct has air outlet, and the air outlet of the ventilation duct is rotatably connected to
Dynamic head, the rotary head have wind-guiding section, and the upper end of the wind-guiding section and the air outlet of ventilation duct are rotatablely connected, the rotary head
The periphery of lower end be provided with multiple blades, multiple blades along the wind-guiding section peripheral ring around；Tool in the wind-guiding section
There is the air-guiding aisle of connection air outlet, jet channel is provided on the blade, is led described in the inner end connection of the jet channel
Wind channel, the outer end of the jet channel extend to the outer edge of the blade, form puff prot；
3), start the air compressor machine, compressed air passes through the inside of the ventilation duct, leads as described in air outlet entrance
The air-guiding aisle of wind section, the jet channel of the blade is entered by the air-guiding aisle of the wind-guiding section, and then is led to by the jet
The puff prot in road sprays, and then drives the rotary head rotation, and the blade rotates with it；
4), the rotation of the blade drives the sediment mixing slurry of the priming concrete pile hole bottom to be entered by the stirring entrance
In conduit, and rise along the conduit, is drained into sedimentation basin by the outlet of the conduit；
5), after the sediment of the sediment mixing slurry precipitates in the sedimentation basin, by the pure mud on the sedimentation basin top
Slurry is back to inside the priming concrete pile hole.
Further, the blade is coiled by the bottom of the wind-guiding section along the axial direction of the wind-guiding section upward.
Further, the jet channel is in bending, and the bending direction of the jet channel and the blade are under
Direction of spiraling on and is different.
Further, the blade has upwardly disposed upper surface, and the upper of the blade is arranged in the jet channel
In end face.
Further, the upper surface of the blade is provided with multiple jet channels, multiple jet channel intervals
It is arranged around the periphery of the wind-guiding section.
Further, along the extending direction of inner end to the outer end of the jet channel, the diameter of the jet channel by
It is decrescence small.
Further, along direction from bottom to top, the outer end of the jet channel is spiraled direction bending away from the blade,
Bending section is formed, the puff prot is formed in the end of the bending section.
Further, multiple blades are arranged along the axially spaced-apart of the ventilation duct, and the blade be placed in it is described
The top of the stirring entrance of conduit.
Further, the side wall of the extended segment, which extends outwardly, discharge section, and the discharge section is in horizontally disposed, the row
The inner end of section is connected to the inside of the extended segment out, and the outer end of the discharge section forms the outlet.
Further, along the direction of inner end to the outer end of the discharge section, the bottom sidewall of the discharge section is downwardly inclined
Arrangement.
Compared with prior art, provided by the present invention for the borehole cleaning method of the big partial size sediment in priming concrete pile hole bottom, by
The periphery of the lower end of rotary head is provided with multiple blades, and when air compressor machine is toward when blowing inside ventilation duct, compressed air passes through described
The inside of ventilation duct is entered the air-guiding aisle of wind-guiding section by air outlet, is led to by the jet that the air-guiding aisle of wind-guiding section enters blade
Road, and then sprayed by the puff prot of jet channel, and then drive rotary head rotation, blade rotates with it, and increases the driving of air blowing
Power, enhancing blow afloat the driving force of sediment, so that the thicker, greater particle size of cleaning and hardened sediment are more practical and efficient.
Detailed description of the invention
Fig. 1 is the schematic front view of borehole cleaning equipment provided in an embodiment of the present invention；
Fig. 2 is the schematic front view of blade provided in an embodiment of the present invention amplification.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Realization of the invention is described in detail below in conjunction with specific embodiment.
The same or similar label correspond to the same or similar components in the attached drawing of the present embodiment；In description of the invention
In, it is to be understood that if there is the orientation or positional relationship of the instructions such as term " on ", "lower", "left", "right" for based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of description of the present invention and simplification of the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore describe the use of positional relationship in attached drawing
Language only for illustration, should not be understood as the limitation to this patent, for the ordinary skill in the art, can be with
The concrete meaning of above-mentioned term is understood as the case may be.
It is preferred embodiment provided by the invention referring to shown in figure.
Provided by the present invention for the borehole cleaning method of the big partial size sediment in priming concrete pile hole bottom, it can be used for clearing up priming concrete pile hole 16
The thicker of bottom, greater particle size and hardened sediment 20.
For the borehole cleaning method of the big partial size sediment in priming concrete pile hole bottom, including following construction procedure:
1) conduit 15, is placed in priming concrete pile hole 16, the lower end of conduit 15 has stirring entrance, and conduit 15, which has, to be extended
The extended segment 23 of 16 top of priming concrete pile hole out, extended segment 23 has outlet 22；
2) ventilation duct 12, is placed in the inside of conduit 15, the top of ventilation duct 12 connects air compressor machine 10, and air compressor machine 10 is past logical
It blows inside air hose 12；The bottom of ventilation duct 12 has air outlet 25, and the air outlet 25 of ventilation duct 12 is rotatably connected to rotary head
17, rotary head 17 has wind-guiding section 13, and the upper end of wind-guiding section 13 and the air outlet 25 of ventilation duct 12 are rotatablely connected, rotary head 17
The periphery of lower end is provided with multiple blades 18, multiple blades 18 along wind-guiding section 13 peripheral ring around；There is connection in wind-guiding section 13
The air-guiding aisle of air outlet 25, jet channel 26 is provided on blade 18, and the inner end of jet channel 26 is connected to air-guiding aisle, jet
The outer end in channel 26 extends to the outer edge of blade 18, forms puff prot 19；
3), start air compressor machine 10, compressed air passes through the inside of ventilation duct 12, enters leading for wind-guiding section 13 by air outlet 25
Wind channel is entered the jet channel 26 of blade 18 by the air-guiding aisle of wind-guiding section 13, and then by the puff prot of jet channel 26 19
It sprays, and then rotary head 17 is driven to rotate, blade 18 rotates with it；
4) 20 mixing slurry of sediment of the, rotation of blade 18, driving 16 bottom of priming concrete pile hole enters conduit 15 by stirring entrance
It is interior, and rise along conduit 15, it is drained into sedimentation basin 21 by the outlet 22 of conduit 15；
5), after the sediment 20 of 20 mixing slurry of sediment precipitates in sedimentation basin 21, the pure mud on 21 top of sedimentation basin is returned
It flow to inside priming concrete pile hole 16.
After starting air compressor machine 10, compressed air gas and mud formed the light mixture of density in conduit 15 constantly on
It is floating, and then the outlet 22 of the mud overflow containing sediment 20 to conduit 15 is driven to drain into sedimentation basin 21, sediment 20 is in sedimentation basin
After being precipitated in 21, remaining pure mud is returned in drilling, is constantly recycled, to achieve the purpose that remove sediment 20 in mud.
The borehole cleaning method for the big partial size sediment in priming concrete pile hole bottom of above-mentioned offer, by the outer of the lower end of rotary head 17
It is provided with multiple blades 18 week, when air compressor machine 10 is toward when blowing inside ventilation duct 12, compressed air passes through the ventilation duct 12
Inside is entered the air-guiding aisle of wind-guiding section 13 by air outlet 25, is led to by the jet that the air-guiding aisle of wind-guiding section 13 enters blade 18
Road 26, and then sprayed by the puff prot of jet channel 26 19, and then rotary head 17 is driven to rotate, blade 18 rotates with it, and increases
The driving force of air blowing, enhancing blow afloat the driving force of sediment 20, so that clearing up thicker, greater particle size and hardened sediment 20
It is more practical and efficient.
Blade 18 is coiled by the bottom of wind-guiding section 13 along the axial direction of wind-guiding section 13 upward, then when blade 18 rotates,
The range that gas-flow radiation can be driven bigger, and blade 18, along the coiling axially upwards of wind-guiding section 13, blade 18 rotates shape
At pressure difference, it is easier to which sediment 20 is sent out ventilation duct 12 along 13 axial direction of wind-guiding section.
In addition, jet channel 26 is in bending, and the bending direction of jet channel 26 with blade 18 spiraling from bottom to top
Direction is different, and when clearing up sediment 20, the jet direction of jet channel 26 and the direction of spiraling of blade 18 are respectively towards different
Direction to reduce bottom hole dead angle, and greatly improves the cleaning of bottom hole sediment 20 in this way, bigger range can be purged to
Effect.
Blade 18 has upwardly disposed upper surface, and blade 18 has the lower end surface arranged downward, and jet channel 26 is arranged
In the upper surface of blade 18；When 18 high-speed rotation of blade, it will drive the mud containing sediment 20 and move from the bottom to top, then just
It has part mud to be adhered on the lower end surface of blade 18, therefore jet channel 26 is arranged in the upper surface on blade face for we,
In this way, it is possible to prevente effectively from mud is adhered on blade 18 and mud enters the situation in jet channel 26, and then increase
The service life of equipment.
In addition, the upper surface of blade 18 is provided with multiple jet channels 26, multiple 26 spacer rings of jet channel are around wind-guiding section
13 periphery arranges that such jet channel 26 can be ejected into as far as possible in this way, jet channel 26 is arranged in the periphery of wind-guiding section 13
Remote distance, when blade 18 rotates, jet channel 26 can be purged to wider, realize that dead angle is not stayed in 360 ° of all standings.
Along the extending direction of inner end to the outer end of jet channel 26, the diameter of jet channel 26 is gradually reduced, air-flow from
When jet channel 26 is ejected outward by inner end, flow velocity is increased rapidly, and air flow pressure also increases rapidly, logical reaching jet
When 26 outer end of road, flow velocity and pressure increase to maximum value, the air-flow ejected in this way, on the one hand can be purged to it is farther away from
From on the other hand, purging effort is bigger, and mud upward velocity faster, can easily stir broken seethe again of big partial size sediment 20
It is dynamic to rise, thus the sediment 20, thicker sediment 20 and part of clearing up greater particle size it is hardened sediment 20 it is more easy.
Furthermore along direction from bottom to top, the outer end of jet channel 26 is spiraled direction bending away from blade 18, forms bending
Section, puff prot 19 are formed in the end of bending section, and the kinetic energy rejection to caused by of sudden change of flow speed caused by such bend can be small very
It is more, while reducing energy consumption, and it can effectively promote cleaning effect.
Multiple blades 18 are arranged along the axially spaced-apart of ventilation duct 12, and blade 18 is placed in the upper of the stirring entrance of conduit 15
Side, when blade 18 rotates, gas will soon be mixed with by the mud for being located at 18 lower section of blade, form the lighter mixing of density
Body constantly floats, and the blade 18 by axially arranging along ventilation duct 12, is transferred to 22 position of outlet.
The side wall of extended segment 23, which extends outwardly, discharge section, and in horizontally disposed, the inner end connection that section is discharged extends discharge section
The inside of section 23, the outer end that section is discharged form outlet 22, in this way, the mixture of gas and mud passes through air compressor machine 10 from conduit
15 stirring entrance enters, and realizes and float under the action of blade 18, finally floats up to outlet 22 and drains into sedimentation basin 21
It is interior.
Along the direction of inner end to the outer end of discharge section, the bottom sidewall that section is discharged is downwardly inclined arrangement, in this way, more convenient
Float up to the discharge of the mixture of the gas and mud that exclude fragment position.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. being used for the borehole cleaning method of the big partial size sediment in priming concrete pile hole bottom, which is characterized in that including following construction procedure:
1) conduit, is placed in priming concrete pile hole, the lower end of the conduit has stirring entrance, and the conduit, which has, extends institute
The extended segment above priming concrete pile hole is stated, the extended segment has outlet；
2) ventilation duct, is placed in the inside of the conduit, the top of the ventilation duct connects air compressor machine, and the air compressor machine is described in
It blows inside ventilation duct；The bottom of the ventilation duct has air outlet, and the air outlet of the ventilation duct is rotatably connected to rotary head,
The rotary head has wind-guiding section, and the upper end of the wind-guiding section and the air outlet of ventilation duct are rotatablely connected, under the rotary head
The periphery at end is provided with multiple blades, multiple blades along the wind-guiding section peripheral ring around；Have in the wind-guiding section and connects
The air-guiding aisle in pass-out air port is provided with jet channel on the blade, and it is logical that the inner end of the jet channel is connected to the wind-guiding
Road, the outer end of the jet channel extend to the outer edge of the blade, form puff prot；
3), start the air compressor machine, compressed air passes through the inside of the ventilation duct, enters the wind-guiding section by the air outlet
Air-guiding aisle, the jet channel of the blade is entered by the air-guiding aisle of the wind-guiding section, and then by the jet channel
Puff prot sprays, and then drives the rotary head rotation, and the blade rotates with it；
4), the rotation of the blade drives the sediment mixing slurry of the priming concrete pile hole bottom to enter conduit by the stirring entrance
It is interior, and rise along the conduit, it is drained into sedimentation basin by the outlet of the conduit；
5), after the sediment of the sediment mixing slurry precipitates in the sedimentation basin, the pure mud on the sedimentation basin top is returned
It flow to inside the priming concrete pile hole.
2. being used for the borehole cleaning method of the big partial size sediment in priming concrete pile hole bottom as described in claim 1, which is characterized in that the blade
By the bottom of the wind-guiding section, coiled upward along the axial direction of the wind-guiding section.
3. being used for the borehole cleaning method of the big partial size sediment in priming concrete pile hole bottom as claimed in claim 2, which is characterized in that the jet
Channel is in bending, and the bending direction of the jet channel is different with the direction of spiraling of the blade from bottom to top.
4. being used for the borehole cleaning method of the big partial size sediment in priming concrete pile hole bottom as claimed in claim 3, which is characterized in that the blade
With upwardly disposed upper surface, the jet channel is arranged in the upper surface of the blade.
5. being used for the borehole cleaning method of the big partial size sediment in priming concrete pile hole bottom as claimed in claim 4, which is characterized in that the blade
Upper surface be provided with multiple jet channels, multiple jet channel spacer rings are arranged around the periphery of the wind-guiding section.
6. being used for the borehole cleaning method of the big partial size sediment in priming concrete pile hole bottom as claimed in claim 5, which is characterized in that along described
The diameter of the extending direction of the inner end of jet channel to outer end, the jet channel is gradually reduced.
7. being used for the borehole cleaning method of the big partial size sediment in priming concrete pile hole bottom as claimed in claim 6, which is characterized in that along from lower
On direction, the outer end of the jet channel spirals direction bending away from the blade, forms bending section, the puff prot is formed
In the end of the bending section.
8. such as the described in any item borehole cleaning methods for the big partial size sediment in priming concrete pile hole bottom of claim 1-7, which is characterized in that
Multiple blades are arranged along the axially spaced-apart of the ventilation duct, and the blade is placed in the upper of the stirring entrance of the conduit
Side.
9. such as the described in any item borehole cleaning methods for the big partial size sediment in priming concrete pile hole bottom of claim 1-7, which is characterized in that
The side wall of the extended segment, which extends outwardly, discharge section, and the discharge section is in horizontally disposed, the inner end connection institute of the discharge section
The inside of extended segment is stated, the outer end of the discharge section forms the outlet.
10. being used for the borehole cleaning method of the big partial size sediment in priming concrete pile hole bottom as claimed in claim 9, which is characterized in that along described
The direction of inner end to the outer end of section is discharged, the bottom sidewall of the discharge section is downwardly inclined arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811527498.1A CN109577893A (en) | 2018-12-13 | 2018-12-13 | Borehole cleaning method for the big partial size sediment in priming concrete pile hole bottom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811527498.1A CN109577893A (en) | 2018-12-13 | 2018-12-13 | Borehole cleaning method for the big partial size sediment in priming concrete pile hole bottom |
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| Publication Number | Publication Date |
|---|---|
| CN109577893A true CN109577893A (en) | 2019-04-05 |
Family
ID=65929657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811527498.1A Pending CN109577893A (en) | 2018-12-13 | 2018-12-13 | Borehole cleaning method for the big partial size sediment in priming concrete pile hole bottom |
Country Status (1)
| Country | Link |
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| CN (1) | CN109577893A (en) |
Cited By (4)
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|---|---|---|---|---|
| CN110409422A (en) * | 2019-08-05 | 2019-11-05 | 广西路桥工程集团有限公司 | Construction method for diaphragm walls and ground-connecting-wall construction system |
| CN110409421A (en) * | 2019-08-05 | 2019-11-05 | 广西路桥工程集团有限公司 | Ultra-deep stake ground-connecting-wall construction system |
| CN113389200A (en) * | 2021-05-08 | 2021-09-14 | 深圳市工勘岩土集团有限公司 | Pile hole sediment gas lift reverse circulation equipment |
| CN116241201A (en) * | 2023-02-23 | 2023-06-09 | 安徽建筑大学 | Bored concrete pile drilling secondary cleaning device |
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| CN110409421A (en) * | 2019-08-05 | 2019-11-05 | 广西路桥工程集团有限公司 | Ultra-deep stake ground-connecting-wall construction system |
| CN113389200A (en) * | 2021-05-08 | 2021-09-14 | 深圳市工勘岩土集团有限公司 | Pile hole sediment gas lift reverse circulation equipment |
| CN113389200B (en) * | 2021-05-08 | 2022-11-18 | 深圳市工勘基础工程有限公司 | Pile hole sediment gas lift reverse circulation equipment |
| CN116241201A (en) * | 2023-02-23 | 2023-06-09 | 安徽建筑大学 | Bored concrete pile drilling secondary cleaning device |
| CN116241201B (en) * | 2023-02-23 | 2023-08-25 | 安徽建筑大学 | Bored concrete pile drilling secondary cleaning device |
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Application publication date: 20190405 |