CN206987735U - Dual-purpose drill bit for holing with slurry wall protection filling pile construction - Google Patents
Dual-purpose drill bit for holing with slurry wall protection filling pile construction Download PDFInfo
- Publication number
- CN206987735U CN206987735U CN201720950691.0U CN201720950691U CN206987735U CN 206987735 U CN206987735 U CN 206987735U CN 201720950691 U CN201720950691 U CN 201720950691U CN 206987735 U CN206987735 U CN 206987735U
- Authority
- CN
- China
- Prior art keywords
- drill bit
- dual
- drill body
- drill
- holing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model discloses the dual-purpose drill bit for holing with slurry wall protection filling pile construction.Dual-purpose drill bit includes drill bit, drill body, flank and screw thread stabilizer, and the drill body is hollow, is water-exit vertically mouth at the top of drill body, is provided with delivery port in the middle part of drill body, water outlet is provided with water fender；The serrate drill bit of band is fixed on the top of drill body by screw socket, described to have sidepiece that is multiple and being weldingly fixed on drill body at equal intervals with the flank for boring tooth.The dual-purpose drill bit for being used for holing with slurry wall protection filling pile construction has two kinds of functions, the first function：Pore-forming is crept into, second of function：Clean pile crown.Belong to pore-forming drilling and pile crown cleans dual-purpose drill bit, and the function with keyhole perpendicularity, its is simple in construction, vdiverse in function, is easy to process, cost is relatively low.
Description
Technical field
It the utility model is related to drilling field, especially a kind of dual-purpose brill for holing with slurry wall protection filling pile construction
Head.
Background technology
Holing with slurry wall protection bored concrete pile is a kind of more extensive technique, while is a kind of underwater grouting technique again, pile crown
Influx height be difficult accurately to control, particularly currently with the quickening of urbanization process, soil is more and more valuable, and building is opened
Begin to high-altitude and underground development, the more and more higher that building is built, foundation ditch is dug increasingly deeper, and holing with slurry wall protection is carried out in deep basal pit
Filling pile construction, difficulty is very big, and conventional construction method is that pile foundation construction is first carried out on ground, is entered again after pile foundation construction
Row earth excavation and pattern foundation pit supporting structure.This working procedure, the control difficulty of the pile crown height of cast-in-situ bored pile is further increased, due to
Foundation ditch is deeper, designs that the buried depth of stake top is also bigger, the bad assurance of concrete surface absolute altitude in pile body filling process, if concrete
Designed elevation could not be filled into, pile extension is carried out after excavation of foundation pit, due to level of ground water, pile extension work basically can not
Carry out, so in order to avoid the pile extension in deep basal pit as far as possible, the influx height control of concrete is typically more slightly higher than as defined in specification,
Due to the factor of the working experience deficiency of workmen and stratum difference etc., the pile crown height after pile, which often exceeds, to be set
Absolute altitude 3-4m is counted, to follow-up earth excavation, pile crown, which cuts and transported outward, brings difficulty, adds expense.
The control of borehole perpendicularity is always problem present in bored pile construction, influences the factor of borehole perpendicularity
Have a lot, can be divided mainly into preparatory stage factor and construction stage factor before construction.The influence factor of preparatory stage can before construction
To be calibrated by pretreatment works such as personnel's early stage, machinery, material, technique, places to reduce deviation, and in the construction stage
Because subsurface picture is not clear or incident is unexpected, once borehole perpendicularity, which occurs, in problem unavoidably occurs deviation, therefore constructing
During degree control measure be just particularly important.
Utility model content
In order to solve the deficiencies in the prior art, the utility model proposes two for holing with slurry wall protection filling pile construction
With drill bit, can pore-forming drilling, and can cleans pile crown, can also control the perpendicularity in drill bit drilling process to a certain extent.
The utility model adopts the following technical scheme that：
A kind of dual-purpose drill bit for holing with slurry wall protection filling pile construction, including the drill bit of threaded interface, band spiral shell
The hush panel of line interface, hollow drill body and the flank provided with brill tooth, the drill body top is water-exit vertically mouth, is opened in the middle part of drill body
There is horizontal outlet, water fender is provided with horizontal outlet, center board case is on drill body；The drill bit or hush panel pass through
Screw socket is fixed on the top of drill body, and when drill bit is fixed on the top of drill body, the water-exit vertically mouth at the top of drill body is open state
State, when hush panel is fixed on the top of drill body, hush panel blocks the water-exit vertically mouth at the top of drill body；The flank has multiple
And the sidepiece of drill body is weldingly fixed at equal intervals；The lower end of the flank is connected with the stabilizer of annular.
Preferably, the taper bit that the drill bit is made up of three drills is sharp, and sawtooth is densely covered with the drill.
Preferably, the upper end of the flank is fixed on drill body top, and the lower end of flank is connected under drill body by fixed-wing
Portion；The drill body, flank, fixed-wing form triangle and fix support.
Preferably, the stabilizer is screw thread stabilizer, and screw thread stabilizer is used to be engaged the soil body in drill bit drilling process,
Ensure the vertical to stable of drilling rod.
Preferably, the flank, which is provided with, bores tooth.
Preferably, the delivery port has two, and delivery port is a diameter of 4cm round mouth.
Preferably, the delivery port is provided with rubber seal.
Preferably, rubber seal bottom inner ring is slightly larger than delivery port, and the outer ring of rubber seal has certain song
Spend for being bonded drill body curved surface.
Preferably, the water fender internal diameter is slightly larger than drill body external diameter, and water fender is fixed on drill body by chute, water fender
Inner surface extrudes rubber seal, passes through the friction of rubber seal elasticity extruding increase water fender and drill body.
Preferably, on the drill body eminence neat with horizontal outlet and perpendicular to horizontal outlet line it is symmetrical two spot welding
There is fixing bolt, the chute is symmetrically distributed in water fender both sides, and fixing bolt coordinates with chute to be played stable water fender and hinder
Only its effect slid.
Preferably, the flank has four, and is fixed on the sidepiece of drill body in crosswise at equal intervals.
Use the advantageous effects that as above technical scheme obtains for：
The dual-purpose drill bit for being used for holing with slurry wall protection filling pile construction has two kinds of functions, the first function：Into hole drill
Enter, second of function：Clean pile crown.Belong to pore-forming drilling and pile crown cleans dual-purpose drill bit, can also control brill to a certain extent
Perpendicularity in head drilling process, and it is simple in construction, it is easy to process, cost is relatively low.
Drill bit water-exit vertically mouth is opened during normal pore-forming drilling, the delivery port of drill bit side wall is closed, makes water (flow) direction vertical
Downwards, be advantageous to improve pore-forming rate of penetration, so as to improve efficiency of construction；Drill bit water-exit vertically mouth is closed when cleaning pile crown
Close, the mouth of a river of tube wall side in the middle part of drill bit is opened, to avoid vertical current from damaging pile crown.
Brief description of the drawings
Fig. 1 is the dual-purpose drill bit structure schematic diagram for holing with slurry wall protection filling pile construction.
Fig. 2 is Fig. 1 side view.
Fig. 3 is Fig. 1 top view.
Fig. 4 is drill bit structure schematic diagram.
Fig. 5 is drill bit and drill body attachment structure schematic diagram.
Fig. 6 is drill bit, drill body, flank attachment structure schematic diagram.
Fig. 7 is the dual-purpose drill bit installation hush panel schematic diagram for holing with slurry wall protection filling pile construction.
Fig. 8 is delivery port encapsulation schematic diagram.
Fig. 9 is Fig. 8 side cut-away view.
Figure 10 is the dual-purpose drill bit structure schematic diagram for holing with slurry wall protection filling pile construction of embodiment 3.
Figure 11 is the dual-purpose drill bit installation hush panel schematic diagram that embodiment 3 is used for holing with slurry wall protection filling pile construction.
In figure, 1, drill bit, 2, water-exit vertically mouth, 3, drill body, 4, bore tooth, 5, flank, 6, stabilizer, 7, water fender, 8,
Delivery port, 9, fixed-wing, 10, hush panel, 11, rubber seal, 12, chute, 13, fixing bolt.
Embodiment
It is described further with reference to 1 to 11 pair of specific mode of having a try of the present utility model of accompanying drawing：
Embodiment 1：
A kind of dual-purpose drill bit for holing with slurry wall protection filling pile construction, including the drill bit 1 of threaded interface, band spiral shell
Hush panel 10, drill body 3 and the flank 5 of line interface, the drill body 3 is hollow, and the top of drill body 3 be water-exit vertically mouth 2, in the middle part of drill body 3
Delivery port 8 is provided with, is provided with water fender 7 at delivery port 8, water fender 7 is sleeved on drill body 3；The drill bit 3 or hush panel 10 are solid
It is scheduled on the top of drill body 3.The flank 5 has sidepiece that is multiple and being fixed on drill body 3 at equal intervals.
When drill bit 1 is fixed on the top of drill body 3, the water-exit vertically mouth 2 at the top of drill body 3 is opening-wide state, works as sealing
When plate 10 is fixed on the top of drill body 3, hush panel 10 blocks the water-exit vertically mouth 2 at the top of drill body 3.
The taper bit that drill bit is made up of three drills is sharp, is densely covered with sawtooth in the drill, adds drill bit
Drilling dynamics.
The upper end of flank is fixed on drill body top, and the lower end of flank connects the bottom of drill body by fixed-wing 9；The brill
Body, flank, fixed-wing form triangle and fix support, increase the fastness of dual-purpose drill bit.Flank, which is provided with, bores tooth, is easy to dual-purpose
The drilling of drill bit.The lower end of flank is connected with the stabilizer of annular, and flank is supported for fixed.
Delivery port has two, and symmetrical, delivery port is a diameter of 4cm round mouth.
Delivery port is provided with rubber seal 11, and rubber seal is used to block delivery port.
Rubber seal bottom inner ring is slightly larger than delivery port, can fill in hole and be not easy to loosen, top race diameter is more than
More than aperture 10mm, and there is certain curvature, guarantee to be bonded drill body curved surface.
Flank is preferably four, and is fixed on the sidepiece of drill body in crosswise at equal intervals.Now, the spacing of flank is just accord with
It is suitable, it is easy to the outer row of sandy soil, also with appropriate drilling cutting force.
Embodiment 2：
As shown in FIG. 8 and 9, on the basis of embodiment 1, water fender internal diameter is slightly larger than drill body external diameter, and water fender passes through cunning
Groove 12 is fixed on drill body, water fender inner surface extruding rubber seal, passes through rubber seal elasticity extruding increase water fender
With the friction of drill body.
Fixed spiral shell is connected to 8 neat eminence of horizontal outlet on drill body 3 and perpendicular to symmetrical two spot welding of the line of horizontal outlet 8
Bolt 13, the chute 12 are symmetrically distributed in the both sides of water fender 7, and fixing bolt 13 coordinates with chute 12 plays stable water fender 7 simultaneously
The effect for preventing it from sliding.
Fixing bolt 13 is welded on drill body, be with the neat high stud of horizontal outlet, positioned at two delivery ports
Between, left and right each one, fixing bolt line and horizontal outlet line are in cross.After on center board case, because drill bit needs
Creep into, thus it is inevitable be able to must be rubbed with the soil body, if simply simple fixed, water fender is easy for falling off,
Chute and fixing bolt therefore serves stable water fender and prevents the effect slid.
Water fender is 115mm away from drill bit side internal diameter, and nearly drill bit side internal diameter is 112mm, the wide about 60mm of plate, wall
Thick 3mm.Twice chute is provided with water fender, chute is symmetrically distributed in water fender both sides.Trough width about 8mm, is available for being located at out
The fixing bolt (diameter about 8mm) being welded and fixed of the height both sides such as mouth of a river slides.
Before the welding of drill bit flank, water fender is inserted in brill body.Before drilling perforate construction, by rubber seal plug in level
In delivery port, water fender is put, allows fixing bolt to be finally fixed on fixing end by chute.After drill bit perforate, use in time
Clear water cleans drill bit, and water fender is unloaded, and rubber seal is taken out, and water fender freely hangs.It is clear to be used for laitance in drill bit
During reason, the water-exit vertically mouth of drill bit is closed, the seal degree of logical mud test delivery port is needed before lower brill.
Embodiment 3：
As shown in Figure 10,11, on the basis of embodiment 2 and 3, the stabilizer is screw thread stabilizer, screw thread stabilizer
For being engaged the soil body in drill bit drilling process, ensure the vertical to stable of drilling rod.
In going down process, because many factors influence that drilling rod can be caused to bend or tilt, and drilling is had influence on
Perpendicularity, drilling rod is more long easier to occur such situation.Cause this reason in addition to the factor of force majeure, it is most important
Exactly because only make use of this fulcrum of rig in drilling process, drill bit is easy to swing.The design utilizes
The principle of two points one lines, set screw thread stabilizer preferable can must be engaged the soil body in drill bit drilling process, as in nearly drill bit
Place adds a fulcrum, so as to ensure the vertical to stable of drilling rod.
Dual-purpose drill bit shown in Examples 1 and 2 can be used for creeping into thin solum, and the dual-purpose drill bit shown in the present embodiment can use
In the soil layer for creeping into various depth.
Embodiment 4：
The dual-purpose drill bit elder generation pore-forming drilling for holing with slurry wall protection filling pile construction of example 1,2 or 3 is performed as described above, then
Clean drill bit.
In boring positioning, levelling of the land (such as soil body is soft to be needed to harden), rig is in place afterwards, will be used for holing with slurry wall protection filling
The dual-purpose drill bit of note pile driving construction installs, and horizontal outlet need to fill in water fender in rubber seal rear enclosure；Check bore position
With drilling rod perpendicularity it is errorless after, start rig, be passed through mud, start to creep into；Rate of penetration is formulated according to field condition, in pore-forming
The water-exit vertically mouth of drill bit is available for mud disengaging (point positive and negative circulation technology), the screw thread stabilization of annular stabilizer in drilling process
Device, by certain restraining force between screw thread soil compaction mode and the soil body be present, forms one and fixes the strong point, pass through control in drilling process
Drilling rod perpendicularity in ground processed and play a part of the overall perpendicularity of control, make drilling rod and water (flow) direction vertical.
Dual-purpose drill bit depth of setting control for holing with slurry wall protection filling pile construction is more than design stake top absolute altitude
At 0.8-1.0m.
Every meter of spin rinse time of dual-purpose drill bit for holing with slurry wall protection filling pile construction is about 1 minute, closes on ground
Face lifting speed can suitably be accelerated.
After filling concrete, conduit to be extracted, removes perfusion aperture frame, rig repositions, and dismantles drill bit,
It is replaced with the hush panel of threaded interface；Horizontal water fender is turned on, removes the rubber seal that delivery port is filled in, the outflow of mud
Direction is not downward and is horizontally oriented injection stream and goes out；By for the dual-purpose drill bit of holing with slurry wall protection filling pile construction with drilling rod
In tripping in hole, and strict controlling depth.After depth confirmation is errorless, starts rig and slush pump and slowly lifted.Protected for mud
The continuous rotational agitation of dual-purpose drill bit of wall bored pile construction, because the flushing of the rotational agitation and current of dual-purpose drill bit is made
With mortar being replaced out with mud, superfilled part is no longer concrete, but loose sand and rubble.
In actual applications, after filling concrete, conduit is extracted, removes perfusion aperture frame, rig is again
Position, the dual-purpose drill bit that this is used for holing with slurry wall protection filling pile construction install, and delivery port need to fill in rubber seal rear enclosure
Upper water fender.Check it is errorless after with drilling rod tripping in hole, dual-purpose drill bit depth of setting control is in design stake top absolute altitude above 0.8-
1.0m, this depth must be controlled strictly.After depth confirmation is errorless, starts rig and slush pump and slowly lifted, slush pump is must
Indispensable auxiliary equipment, power are advisable with 2PN；Or so dual-purpose about 1 minute spin rinse time of every meter of drill bit, close on ground and carry
Lifting speed can suitably be accelerated.
The drill body of the Stake head handling drill bit preferably selects a diameter of 108mm wall thickness 5mm steel pipes, and pipe range is more than 1.0m, to avoid
Mud pump pressure is excessive to be caused to wash out the stake top at designed elevation, and drill bit bottom drill bit is replaced by into hush panel before lower brill
10, water-exit vertically mouth is closed, while open the mouth of a river of 2 diameter about 4cm of tube wall side in the middle part of drill body.Drill bit bottom apex point
Part is connected with drill body by hickey, and the circular seal plate of threaded interface, hush panel such as bottle are replaced with when removing laitance
The general set of lid and drill bit bottom.
The outflow direction of so mud is not downward and is horizontally oriented injection stream and goes out, will not to the stake top at designed elevation
Have any impact, higher than the pile crown at elevation control, due to the rotational agitation of dual-purpose drill bit and the flushing action of current, use mud
Slurry is replaced out mortar, and superfilled part is no longer concrete, but loose sand and rubble.Even if also stake after excavation of foundation pit
Head, its intensity almost do not have, can not form tall and big pile crown, are easy to cut and transport outward, greatly reduce and cut difficulty and processing
Expense.
The dual-purpose drill bit for being used for holing with slurry wall protection filling pile construction has two kinds of functions, the first function：Into hole drill
Enter, second of function：Clean pile crown.Dual-purpose drill bit for holing with slurry wall protection filling pile construction belongs to pore-forming drilling and pile crown
Dual-purpose drill bit is cleaned, it is simple in construction, it is easy to process, cost is relatively low.
Drill bit water-exit vertically mouth is opened during normal pore-forming drilling, the delivery port of drill bit side wall is closed, makes water (flow) direction vertical
Downwards, be advantageous to improve pore-forming rate of penetration, so as to improve efficiency of construction；Drill bit water-exit vertically mouth is closed when cleaning pile crown
Close, the mouth of a river of tube wall side in the middle part of drill bit is opened, to avoid vertical current from damaging pile crown.
Using the dual-purpose drill bit, respective handling can be done to the pile crown being higher by advance, after so waiting excavation of foundation pit, carry out pile crown
When cutting, greatly reduce difficulty of construction and cut and pile crown outward transport expense, improve broken pile speed, shorten the duration.
Certainly, described above is only preferred embodiment of the present utility model, and the utility model is not limited to enumerate above-mentioned
Embodiment, it should be noted that for any those skilled in the art under the guidance of this specification, that is made is all etc.
With replacement, obvious variant, all fall within the essential scope of this specification, ought to be by protection of the present utility model.
Claims (10)
1. a kind of dual-purpose drill bit for holing with slurry wall protection filling pile construction, it is characterised in that include the brill of threaded interface
Head sharp (1), the hush panel (10) of threaded interface, hollow drill body (3) and the flank (5) provided with brill tooth (4), the drill body
(3) top is water-exit vertically mouth (2), is provided with horizontal outlet (8) in the middle part of drill body (3), horizontal outlet (8) place is provided with water fender
(7), water fender (7) is sleeved on drill body (3)；
The drill bit (1) or hush panel (10) are fixed on the top of drill body (3) by screw socket, when drill bit (1) is fixed on brill
During the top of body (3), the water-exit vertically mouth (2) at the top of drill body (3) is opening-wide state, when hush panel (10) is fixed on drill body (3)
Top when, hush panel (10) by the top of drill body (3) water-exit vertically mouth (2) block；
The flank (5) has sidepiece that is multiple and being weldingly fixed on drill body (3) at equal intervals；
The lower end of the flank (5) is connected with the stabilizer (6) of annular.
A kind of 2. dual-purpose drill bit for holing with slurry wall protection filling pile construction according to claim 1, it is characterised in that
The taper bit that the drill bit (1) is made up of three drills is sharp, and sawtooth is densely covered with the drill.
A kind of 3. dual-purpose drill bit for holing with slurry wall protection filling pile construction according to claim 1, it is characterised in that
The upper end of the flank (5) is fixed on drill body (3) top, and the lower end of flank (5) is connected under drill body (3) by fixed-wing (9)
Portion；
The drill body (3), flank (5), fixed-wing (9) form triangle and fix support.
A kind of 4. dual-purpose drill bit for holing with slurry wall protection filling pile construction according to claim 1, it is characterised in that
The stabilizer (6) is screw thread stabilizer, and screw thread stabilizer is used to be engaged the soil body in drill bit (1) drilling process, ensures to bore
Body (3) it is vertical to stable.
5. a kind of dual-purpose drill bit for holing with slurry wall protection filling pile construction according to claim 1 or 4, its feature exist
In the horizontal outlet (8) has two, and horizontal outlet (8) is a diameter of 4cm round mouth.
A kind of 6. dual-purpose drill bit for holing with slurry wall protection filling pile construction according to claim 1, it is characterised in that
The horizontal outlet (8) is provided with rubber seal (11).
A kind of 7. dual-purpose drill bit for holing with slurry wall protection filling pile construction according to claim 6, it is characterised in that
Rubber seal (11) bottom inner ring is slightly larger than horizontal outlet (8), and the outer ring of rubber seal (11) has certain song
Spend for being bonded drill body (3) curved surface.
8. a kind of dual-purpose drill bit for holing with slurry wall protection filling pile construction according to claim 6 or 7, its feature exist
In water fender (7) internal diameter is slightly larger than drill body (3) external diameter, and water fender (7) is fixed on drill body (3) by chute (12), gear
Water plate (7) inner surface extruding rubber seal (11), pass through rubber seal (11) elasticity extruding increase water fender (7) and drill body
(3) friction.
A kind of 9. dual-purpose drill bit for holing with slurry wall protection filling pile construction according to claim 8, it is characterised in that
Eminence neat with horizontal outlet (8) and fixation is connected on the drill body (3) perpendicular to symmetrical two spot welding of horizontal outlet (8) line
Bolt (13), the chute (12) are symmetrically distributed in water fender (7) both sides, and fixing bolt (13) coordinates with chute (12) to be played surely
The effect determined water fender (7) and prevent it from sliding.
10. a kind of dual-purpose drill bit for holing with slurry wall protection filling pile construction according to claim 1, its feature exist
In the flank (5) has four, and is weldingly fixed on the sidepiece of drill body (3) in crosswise at equal intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720950691.0U CN206987735U (en) | 2017-08-01 | 2017-08-01 | Dual-purpose drill bit for holing with slurry wall protection filling pile construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720950691.0U CN206987735U (en) | 2017-08-01 | 2017-08-01 | Dual-purpose drill bit for holing with slurry wall protection filling pile construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206987735U true CN206987735U (en) | 2018-02-09 |
Family
ID=61418078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720950691.0U Expired - Fee Related CN206987735U (en) | 2017-08-01 | 2017-08-01 | Dual-purpose drill bit for holing with slurry wall protection filling pile construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206987735U (en) |
-
2017
- 2017-08-01 CN CN201720950691.0U patent/CN206987735U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107246242A (en) | Dual-purpose drill bit and its application method for holing with slurry wall protection filling pile construction | |
| CN110206493A (en) | A kind of full-sleeve full-rotation construction process for bored pile | |
| CN101737005B (en) | Drilling tool for sleeving anchor cable and construction method for sleeving anchor cable with simultaneous casing | |
| CN104631438B (en) | Long auger guncreting uplift pile construction method | |
| CN108343260A (en) | Inclined building correcting and then reinforcing structure and its construction method | |
| CN105780763A (en) | Construction method of medium-hole vibrating casing wall protection type long spiral cast-in-situ bored pile | |
| CN112663600A (en) | Construction method of cast-in-situ bored pile for water-rich sandy stratum | |
| CN105064336A (en) | Hole forming construction method for three-section type pedestal pile | |
| CN107938683A (en) | One kind tilts pile pit supporting construction and its construction method | |
| CN104895583B (en) | Tunnel surrounding rock control method combining pressure relief and slip-casting reinforcement | |
| CN107489158A (en) | A kind of spiral-digging pore stirs the construction method of water spray soil occlusion curtain pile | |
| CN109024719B (en) | Pile side disturbance resistance-reducing building inclination correcting method | |
| CN110424896A (en) | A kind of hole stake drilling construction method and device suitable for high backfill Karst Geological Landscape | |
| CN110409433A (en) | The construction system and method for basement process are carried out using the bored concrete pile with steel bushing | |
| CN108240180B (en) | Positive and negative circulation anti-sticking bores three wings drag bit subassembly | |
| CN108867673A (en) | A kind of underwater prevention method in the foundation pit based on the curtain that draws water | |
| CN110886577A (en) | Construction method for perpendicularity control of rotary excavating hard secant pile in deep and thick rockfill area | |
| CN104005768A (en) | Construction strengthening method for soft geological layer in middle section of vertical shaft | |
| CN111042820B (en) | Construction method for sand layer with oversized pilot hole by vertical shaft raise-shaft method | |
| CN201459749U (en) | Stable structure for construction platform of deep water steel pipe pile | |
| CN108222843A (en) | A kind of construction method for preventing cast-in-situ bored pile bit freezing | |
| CN206987735U (en) | Dual-purpose drill bit for holing with slurry wall protection filling pile construction | |
| CN111622249B (en) | Miniature pumping device for underground water of narrow foundation pit and construction method thereof | |
| CN201190279Y (en) | Construction equipment for spiral digging small-diameter bored pile | |
| CN108316288A (en) | Half casing guncreting pile construction equipment and construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180209 Termination date: 20200801 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |