CN110273413A - A kind of efficient construction method of prefabricated pile - Google Patents
A kind of efficient construction method of prefabricated pile Download PDFInfo
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- CN110273413A CN110273413A CN201910504381.XA CN201910504381A CN110273413A CN 110273413 A CN110273413 A CN 110273413A CN 201910504381 A CN201910504381 A CN 201910504381A CN 110273413 A CN110273413 A CN 110273413A
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- Prior art keywords
- drilling
- machine
- drilling rod
- stake
- drilling machine
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/06—Foundation trenches ditches or narrow shafts
- E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
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- 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
- E02D5/24—Prefabricated piles
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/0023—Slurry
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
Abstract
The invention discloses a kind of efficient construction methods of prefabricated pile, comprising the following steps: Step 1: sinking to below ground using the casing that engineering equipment will be greater than pile body diameter；Step 2: using taking indigenous equipment to take out the original soil in casing；Step 3: being drilled using the stake machine of configuration at least 2 bench drill machines, drilling rod is connected on each drilling machine, the drilling rod lower end of one of drilling machine is auger stem, the lower end of auger stem is connected with drill bit, drilling machine with drill bit first works drilling, after the completion of the drill hole of drilling machine, continue to drill after the drilling rod of previous drilling machine is connected with the drilling rod of other drilling machines, be completed until entire stake holes drills；Water is added according to geology condition in boring procedure or adds the mixed liquor of water and additive；Step 4: carrying out reaming, base expanding and base expanding and slip casting；Step 5: carrying out plant stake.The present invention has the advantages that construction method is simple, safety, dregs discharge is few, can increase substantially construction efficiency.
Description
Technical field
The present invention relates to construction of prefabricated piles technical field, a kind of especially efficient construction method of prefabricated pile.
Background technique
Current prefabricated pile plants stake technology, has some disadvantages, such as: a plant piling method (CN 105862861
B) it is using single drilling machine progress counterbore and counterbore and to plant stake using same equipment, cannot carries out drilling simultaneously during planting stake and apply
Work plants stake low efficiency；The constructing device and construction method (CN 104947652 of long auger cement paste dado formula implantation tubular pole
It B is) using single drilling machine pore-forming, construction efficiency is low, and bore mode takes full spiral pore-forming, and mud emission amount is big；It is non-pre- to answer
It is using single drilling machine progress counterbore, and mud that pile construction method (105421445 A of CN) is planted in power centrifugal high-strength concrete stake
(dregs) discharge amount is larger, and it is half soil compaction that stiff composite pile (202298602 U of CN), which is to plant stake using after the stirring of single drilling machine,
Stake has a certain impact to ambient enviroment tool.
When present prefabricated pile plants stake punching, the connection of drilling rod is more troublesome, and substantially program is such that first segment drilling rod bores
After in place, drilling rod and drilling machine are detached from, and drilling machine promotes 15-20 meters, are sling drilling rod to be spliced together with wirerope using crane, will
Drilling rod lower end with splicing and the drilling rod for piercing underground connect, and are manually inserted firmly with bolt, mobile stake machine, below drilling machine
Interface and upper end with splicing are aligned insertion, using manually making the coaster of a machine to high-altitude, by drilling machine and drilling rod to be spliced
Bolt insertion in upper end is tightened, and removes the wirerope of crane lifting drilling rod, and splicing is completed.Connection procedure is cumbersome, and there are high-altitudes
Operation has certain security risk.
In conclusion the generally existing construction efficiency of the implanted prosthetics of current prefabricated pile is low, Squeezing Soil Pile is to surrounding enviroment
There is certain influence, non-Squeezing Soil Pile mud emission amount is bigger, and the requirement for the environmentally protective pile foundation advocated with current country is disagreed；
Therefore, the construction method of existing prefabricated pile requires further improvement.
Summary of the invention
It is simple, safe that the technical problem to be solved by the invention for the present situation of prior art is to provide construction methods, slag
Soil discharge is few, can increase substantially a kind of efficient construction method of prefabricated pile of construction efficiency.
The technical scheme of the invention to solve the technical problem is:
A kind of efficient construction method of prefabricated pile, comprising the following steps:
Step 1: sinking to below ground using the casing that engineering equipment will be greater than pile body diameter；
Step 2: using taking indigenous equipment to take out the original soil in casing；
Step 3: drilling using the stake machine of configuration at least 2 bench drill machines, it is connected with drilling rod on each drilling machine, it is one of to bore
The drilling rod lower end of machine is auger stem, and the lower end of auger stem is connected with drill bit, and the drilling machine with drill bit first works drilling, the brill
After the completion of machine drill hole, continue to drill after the drilling rod of previous drilling machine is connected with the drilling rod of other drilling machines, until entire stake holes has drilled
At；Water is added according to geology condition in boring procedure or adds the mixed liquor of water and additive；
Step 4: carrying out reaming, base expanding and base expanding and slip casting；
Step 5: carrying out plant stake.
The technical measures of optimization further include:
Above-mentioned engineering equipment is hammering and pulling-out machine, vibration hammer, static pressure machine or drilling machine.
The diameter of above-mentioned casing is greater than pile body diameter 50 mm to 250mm.
Above-mentioned casing uses Q235 steel, and thickness is in 10mm to 15mm, and the length of casing is at 5 meters to 20 meters.
Above-mentioned stake machine includes pile frame walking crossbeam, is equipped with and can walk along pile frame on the pile frame walking crossbeam
The pile frame of crossbeam planar movement main platform is vertically provided with guide rod on the main platform of the pile frame, be provided on guide rod the first drilling machine and
Second drilling machine is connected with the first drilling rod on the first drilling machine, and the second drilling rod is connected on the second drilling machine, and the lower end of the first drilling rod is spiral shell
The lower end of rotary drill bar, auger stem is connected with drill bit.
The middle and upper part of the first above-mentioned drilling rod is stirring drilling rod, and the second drilling rod is also stirring drilling rod.
Above-mentioned stake machine includes pile frame walking crossbeam, is equipped with and can walk along pile frame on the pile frame walking crossbeam
The main platform of the pile frame of crossbeam planar movement, the main platform of the pile frame are provided with Formwork Support for External frame, are provided on Formwork Support for External frame
First drilling machine, the second drilling machine, third drilling machine and the 4th drilling machine are connected with the first drilling rod on the first drilling machine, connect on the second drilling machine
It is connected to the second drilling rod, third drilling rod is connected on third drilling machine, the 4th drilling rod, the first drilling rod are connected on the 4th drilling machine
Lower end be auger stem, the lower end of auger stem is connected with drill bit.
The middle and upper part of the first above-mentioned drilling rod is stirring drilling rod, and the second drilling rod, third drilling rod and the 4th drilling rod are also to stir
Mix drilling rod.
Above-mentioned additive is bentonite, flocculant, soil body dispersing agent.
Above-mentioned reaming uses mechanical hole reaming, hydraulic reaming, high-pressure flush reaming or high pressure qi of chong channel ascending adversely reaming.
A kind of efficient construction method of prefabricated pile of the invention, construction method is simple, has the advantage that
1, it buries after casing takes out original soil and stores mud, drastically reduce the discharge of mud, it, can be with when stake is long shorter
Accomplish no mud emission, social benefit is significant.
2, counterbore operation is carried out using multiple drilling machines, when spreading and dismounting drilling rod does not need manually to carry out high altitude operation, drop
Low security risk, construction efficiency are significantly promoted.
3, by controlling bore process, so that cement slurry is sufficiently stirred with the soil body, guarantee during planting stake non-
Soil compaction.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the stake machine that the present invention is provided with 2 bench drill machines；
Fig. 2 is the drilling process figure for the stake machine that the present invention is provided with 2 bench drill machines；
Fig. 3 is the structural schematic diagram for the stake machine that the present invention is provided with 4 bench drill machines.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
It is as shown in Figure 1 to Figure 3 structural schematic diagram of the invention,
Appended drawing reference therein are as follows: pile frame walk crossbeam 1, the main platform 2 of pile frame, guide rod 3, the first drilling machine 41, the first drilling rod 41a,
Second drilling machine 42, the second drilling rod 42a, third drilling machine 43, third drilling rod 43a, the 4th drilling machine 44, the 4th drilling rod 44a, drill bit 5, purlin
Posture support frame 6, auger stem 7.
As shown in Figure 1 to Figure 3,
A kind of efficient construction method of prefabricated pile, comprising the following steps:
Step 1: heavy using the casing that engineering equipment (hammering and pulling-out machine, vibration hammer, static pressure machine or drilling machine) will be greater than pile body diameter
Enter below ground；The diameter of casing is greater than pile body diameter 50 mm to 250mm；
Step 2: using taking indigenous equipment to take out the original soil in casing；
Step 3: drilling using the stake machine of configuration at least 2 bench drill machines, it is connected with drilling rod on each drilling machine, it is one of to bore
The drilling rod lower end of machine is auger stem, and the lower end of auger stem is connected with drill bit, and the drilling machine with drill bit first works drilling, the brill
After the completion of machine drill hole, continue to drill after the drilling rod of previous drilling machine is connected with the drilling rod of other drilling machines, until entire stake holes has drilled
At；Water is added according to geology condition in boring procedure or adds the mixed liquor of water and additive；The additive is swelling
Soil, flocculant, soil body dispersing agent.
Step 4: carrying out reaming, base expanding and base expanding and slip casting；In conjunction with geological conditions, in addition to other than supporting course position carries out base expanding and base expanding,
Geological conditions preferably intermediate position soil layer (more closely knit argillic horizon, layer of sand, gravel layer, severely-weathered) carries out ream operation,
Reaming uses mechanical hole reaming, hydraulic reaming, high-pressure flush reaming or high pressure qi of chong channel ascending adversely reaming.
Step 5: carrying out plant stake.
The casing uses Q235 steel, and thickness is in 10mm to 15mm, and the length of casing is at 5 meters to 20 meters.Embedded casing
In the process, the theodolite for being mutually 90 degree using 2 is observed verticality, using detection and localization ruler to casing positioning scenarios into
Row monitoring, can refer to patent: the quiet brill of one kind takes root in stake stake in-plane displancement control tool and its control method
(201410839162.4) technical method described in is controlled, and casing top mark height is higher than nature ground 100-400mm, casing
Strengthening measure is taken outside the 300-500mm of end, 10 mm thick steel plates of welding are reinforced, and there are extravasating hole, shield-tube embedments at the top of casing
In the process, extravasating hole position and excessive stock tank are corresponding, and extra mud along extravasating hole and overflows during guarantee drilling and plant stake
Stock tank carries out unified collection after orderly discharging.
The purpose of shield-tube embedment is:
1) guarantee that the top soil body does not collapse, when especially pile-grafting machine plants stake, need the stress near stake holes, casing is well
Protect the molding of stake holes.
2) drill and plant stake during exclude dregs or mud can section store in casing, reduce mud and slag
The discharge of soil.
3) in boring procedure, drilling rod carries out in casing in casing length range, and casing plays the role of a guiding,
Improve the precision of drilling rod verticality.
4) shield-tube embedment carries out in advance, is not take up the master operation time, in-plane displancement deviation controls precision height, due to casing
Guiding role in boring procedure, can only carry out in casing, due to the high-precision of casing, ensure that the plane of drilling and pile sinking
Displacement high-precision.
It is dry in casing to take soil in step 2, including spiral drills through a cubic metre of earth formula, sleeve takes a cubic metre of earth formula.It is drilled through when using spiral
When native, can be used hammering and pulling-out machine configuration hydraulic motor, hydraulic motor configures auger stem, the diameter and helical blade of auger stem it
Between distance be adjusted according to geological condition, the diameter of auger stem is 10-30mm smaller than the internal diameter of casing, the spiral shell of auger stem
Rotation distance is between 150-350mm, and during reducing and taking soil, soil and casing combine closely to form gas in drilling tool and casing
Fill in effect, for auger using hollow and can rush high pressure gas and washed away, aperture on helical blade reduces the shape of vent plug effect
At.When taking soil using vibration hammer lower sleeve, the device that the installation of sleeve lower end can be silent can be using hydraulic or mechanical side
Formula closes lower port after sleeve is sunk to casing by vibration hammer, and after soil is taken out, silent can open carries out releasing for the soil body
It puts.After the soil body in casing takes out, it is directly placed into haulage vehicle and concentrate in place stacking or be directly transported to over-the-counter
Designated place.
The dregs or Slurry Storage being discharged during drilling and plant stake reduce the row of mud and dregs in casing
It puts, after either mud is more than the capacity of casing to the dregs of discharge, extra mud is emitted into excessive by the extravasating hole of casing
It is uniformly disposed after stock tank.
In step 3, drilling is carried out using the stake machine of configuration at least 2 bench drill machines.The number of drilling machine is selected according to drilling depth
Amount.
When being provided with 2 bench drill machine on stake machine, as shown in Figure 1, the stake machine includes pile frame walking crossbeam 1, it is described
Pile frame walking crossbeam 1 on be equipped with can along pile frame walk 1 planar movement of crossbeam the main platform 2 of pile frame, the main platform 2 of the pile frame
On be vertically provided with guide rod 3, the first drilling machine 41 and the second drilling machine 42, first drilling machine 41 are provided on the guide rod 3
On be connected with the first drilling rod 41a, be connected on second drilling machine 42 under second drilling rod 42a, the first drilling rod 41a
End is auger stem 7, and the lower end of auger stem 7 is connected with drill bit 5.
The middle and upper part of the first drilling rod 41a is stirring drilling rod, and the second drilling rod 42a is also stirring drilling rod.
Drilling rod uses auger stem and stirs the sectional rod of drilling rod, is confirmed according to geological conditions and construction operating condition,
The drilling rod for connecting drill bit position uses auger stem, and length controls 5-10 meters, so that drill bit position is drilled loose the dynamic soil body along spiral shell
Rotary drill bar is discharged upwards, accelerates penetration rate, splices stirring drilling rod on auger stem top, stirs drilling rod and be characterized on drilling rod
Stirring blade is installed, drilling machine enables the soil body is fully dispersed to open and stir evenly in drilling process.When drilling depth is big
When 40 meters, auger stem can be set in the deep position of drilling rod 40, enable the smooth discharge in soil body part, improve construction effect
Rate.
In boring procedure, it is added the mixed liquor of water or water and additive according to geological condition, at 15-20 meters of every drilling,
It needs to carry out hole flushing operation, i.e., extracts drilling machine 5-15 meters upwards, while injecting mixed liquor, reduce the friction of drilling rod and surrounding soil
Power after drilling to designed elevation, then carries out hole flushing operation, and hole flushing can guarantee that soil cement is sufficiently stirred in hole, make simultaneously
During planting stake, soil compaction effect will not occur.
It uses quick coupling to connect (quick coupling is existing frequently-used connection type) between drilling machine and drilling rod, it is convenient to tear spelling open
Fast.After its drilling process is as shown in Fig. 2, stake machine is in place, the work of the first drilling machine 41 drives the first drilling rod 41a and drill bit 5 to rotate,
Drilling downwards, after piercing in place, dismantles quick coupling and the first drilling machine 41 is separated with the first drilling rod 41a, and mobile pile frame master is flat
Platform 2 (pile frame walking crossbeam 1 remains stationary) is aligned the second drilling rod 42a with the first drilling rod 41a, and is connected by quick coupling
Afterwards, the second drilling machine 42 of starting continues to creep into, until being drilled into designed elevation.When extracting drilling rod, the second drilling machine 42 drives second to bore
Bar 42a, the first drilling rod 41a, drill bit 5 upwards extract, after the second drilling rod 42a all bassets, dismantle the second drilling rod 42a with
The quick coupling of first drilling rod 41a separates the second drilling rod 42a with the first drilling rod 41a, mobile main 2 (the pile frame walking of platform of pile frame
Crossbeam 1 remains stationary) it is aligned the first drilling machine 41 with the first drilling rod 41a, and after being connected with quick coupling, start the first drilling machine 41
Extraction is continued up, until drilling rod is all extracted.
When being provided with 4 bench drill machine on stake machine, as shown in figure 3, the stake machine includes pile frame walking crossbeam 1, it is described
Pile frame walking crossbeam 1 on be equipped with can along pile frame walk 1 planar movement of crossbeam the main platform 2 of pile frame, the main platform 2 of the pile frame
It is provided with Formwork Support for External frame 6, the first drilling machine 41, the second drilling machine 42, third drilling machine are provided on the Formwork Support for External frame 6
43 and the 4th drilling machine 44, the first drilling rod 41a is connected on first drilling machine 41, is connected on second drilling machine 42
Second drilling rod 42a is connected with third drilling rod 43a on the third drilling machine 43, is connected with the 4th on the 4th drilling machine 44
The lower end of drilling rod 44a, the first drilling rod 41a are auger stem 7, and the lower end of auger stem 7 is connected with drill bit 5.
The middle and upper part of the first drilling rod 41a is stirring drilling rod, the second drilling rod 42a, the third drilling rod 43a and the
Four drilling rod 44a are also stirring drilling rod.
Its drilling process is similar to above-mentioned 2 bench drill machine, by multiple drilling machine continuous actions, until being drilled into designed elevation.
When 3 bench drill machine is arranged on stake machine, process is similar to 4 bench drill machines of setting.
It works continuously by using multiple drilling machines, when avoiding installation and disassembly stacks, artificial high altitude operation is bored
The splicing of bar, construction efficiency are significantly promoted and eliminate the security risk of high altitude operation.
In step 5, plants stake and completed using pedrail crane or pile-grafting machine.It is single when using pedrail crane, prefabricated pile completely according to
Stake holes is sunk to by pile body self weight；When using pile-grafting machine, the pile driving pressure of pile-grafting machine is controlled, cannot be had to surrounding soil crowded
Native effect.In pedrail crane either pile-grafting machine during planting stake, pile-driving machine can carry out the drilling operation of next pile,
Cross construction is carried out, construction efficiency is improved.
Highly preferred embodiment of the present invention has illustrated, and the various change or remodeling made by those of ordinary skill in the art are not
It can depart from the scope of the present invention.
Claims (10)
1. a kind of efficient construction method of prefabricated pile, it is characterized in that: the following steps are included:
Step 1: sinking to below ground using the casing that engineering equipment will be greater than pile body diameter；
Step 2: using taking indigenous equipment to take out the original soil in casing；
Step 3: drilling using the stake machine of configuration at least 2 bench drill machines, it is connected with drilling rod on each drilling machine, it is one of to bore
The drilling rod lower end of machine is auger stem, and the lower end of auger stem is connected with drill bit, and the drilling machine with drill bit first works drilling, the brill
After the completion of machine drill hole, continue to drill after the drilling rod of previous drilling machine is connected with the drilling rod of other drilling machines, until entire stake holes has drilled
At；Water is added according to geology condition in boring procedure or adds the mixed liquor of water and additive；
Step 4: carrying out reaming, base expanding and base expanding and slip casting；
Step 5: carrying out plant stake.
2. the efficient construction method of a kind of prefabricated pile according to claim 1, it is characterized in that: the engineering equipment is to beat
Drawing machine, vibration hammer, static pressure machine or drilling machine.
3. the efficient construction method of a kind of prefabricated pile according to claim 1, it is characterized in that: the diameter of the casing is big
In pile body diameter 50 mm to 250mm.
4. the efficient construction method of a kind of prefabricated pile according to claim 3, it is characterized in that: the casing uses Q235
Steel, thickness is in 10mm to 15mm, and the length of casing is at 5 meters to 20 meters.
5. the efficient construction method of a kind of prefabricated pile according to claim 1, it is characterized in that: the stake machine includes stake
Frame is walked crossbeam (1), and the stake of crossbeam (1) planar movement that can walk along pile frame is equipped in pile frame walking crossbeam (1)
The main platform of frame (2) is vertically provided with guide rod (3) on the main platform of the pile frame (2), and the guide rod is provided with the first drilling machine on (3)
(41) and the second drilling machine (42) it, is connected with the first drilling rod (41a) on first drilling machine (41), second drilling machine (42)
On be connected with the second drilling rod (42a), the lower end of first drilling rod (41a) is auger stem (7), under auger stem (7)
End is connected with drill bit (5).
6. the efficient construction method of a kind of prefabricated pile according to claim 5, it is characterized in that: first drilling rod
The middle and upper part of (41a) is stirring drilling rod, and second drilling rod (42a) is also stirring drilling rod.
7. the efficient construction method of a kind of prefabricated pile according to claim 1, it is characterized in that: the stake machine includes stake
Frame is walked crossbeam (1), and the stake of crossbeam (1) planar movement that can walk along pile frame is equipped in pile frame walking crossbeam (1)
The main platform of frame (2), the main platform of the pile frame (2) are provided with Formwork Support for External frame (6), are arranged on the Formwork Support for External frame (6)
There are the first drilling machine (41), the second drilling machine (42), third drilling machine (43) and the 4th drilling machine (44), on first drilling machine (41)
It is connected with the first drilling rod (41a), is connected with the second drilling rod (42a) on second drilling machine (42), the third drilling machine
(43) it is connected on third drilling rod (43a), is connected with the 4th drilling rod (44a) on the 4th drilling machine (44), described first
The lower end of drilling rod (41a) is auger stem (7), and the lower end of auger stem (7) is connected with drill bit (5).
8. the efficient construction method of a kind of prefabricated pile according to claim 7, it is characterized in that: first drilling rod
The middle and upper part of (41a) is stirring drilling rod, and second drilling rod (42a), third drilling rod (43a) and the 4th drilling rod (44a) are also equal
To stir drilling rod.
9. the efficient construction method of a kind of prefabricated pile according to claim 1, it is characterized in that: the additive is swelling
Soil, flocculant, soil body dispersing agent.
10. the efficient construction method of a kind of prefabricated pile according to claim 1, it is characterized in that: the reaming uses machine
Tool reaming, hydraulic reaming, high-pressure flush reaming or high pressure qi of chong channel ascending adversely reaming.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111058443A (en) * | 2019-12-19 | 2020-04-24 | 建华建材（中国）有限公司 | Precast pile composite foundation construction method for eliminating loess collapsibility |
| CN111455979A (en) * | 2020-01-07 | 2020-07-28 | 中国电建集团港航建设有限公司 | PHC pile construction process for bottom mud treatment plant |
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| CN111058443A (en) * | 2019-12-19 | 2020-04-24 | 建华建材（中国）有限公司 | Precast pile composite foundation construction method for eliminating loess collapsibility |
| CN111058443B (en) * | 2019-12-19 | 2021-06-22 | 建华建材（中国）有限公司 | Precast pile composite foundation construction method for eliminating loess collapsibility |
| CN111455979A (en) * | 2020-01-07 | 2020-07-28 | 中国电建集团港航建设有限公司 | PHC pile construction process for bottom mud treatment plant |
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Application publication date: 20190924 |