CN108149678A - A kind of loess retaining wall does the construction method of operation pore-creating filling pile - Google Patents
A kind of loess retaining wall does the construction method of operation pore-creating filling pile Download PDFInfo
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- CN108149678A CN108149678A CN201810031111.7A CN201810031111A CN108149678A CN 108149678 A CN108149678 A CN 108149678A CN 201810031111 A CN201810031111 A CN 201810031111A CN 108149678 A CN108149678 A CN 108149678A
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- 238000010276 construction Methods 0.000 title claims abstract description 47
- 238000005553 drilling Methods 0.000 claims abstract description 101
- 238000000034 method Methods 0.000 claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- 230000002787 reinforcement Effects 0.000 claims abstract description 11
- 238000004140 cleaning Methods 0.000 claims abstract description 10
- 238000007689 inspection Methods 0.000 claims abstract description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 239000002689 soil Substances 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 6
- 238000005429 filling process Methods 0.000 claims description 3
- 230000010410 reperfusion Effects 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 2
- 239000003351 stiffener Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 8
- 239000004576 sand Substances 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000011148 porous material Substances 0.000 abstract description 4
- 230000035515 penetration Effects 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 3
- 238000012407 engineering method Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses the construction method that a kind of loess retaining wall in the stratum such as water-free round gravel, cobble, fine sand and miscellaneous fill does operation pore-creating filling pile, which includes the following steps：First time measure of pile position setting-out, for the first time embedded casing, drilling, back-filling in layers loess, second of measure of pile position setting-out, second of drilling, borehole cleaning, inspection hole, pore-forming examination, decentralization steel reinforcement cage and continuous pouring concrete, and casing is extracted after the completion of concreting, form bored concrete pile after carrying out concrete curing.The construction method innovation that loess retaining wall of the present invention in the stratum such as water-free round gravel, cobble, fine sand and miscellaneous fill does operation pore-creating filling pile is irrigated stake into holes protecting wall using loess, compared with existing mud off, loess retaining wall effectively can avoid ground environment from polluting, outstanding advantages of low, difficulty of construction is small, rate of penetration is fast, precision is high is required with pore forming process technology, the super side's amount of concrete can effectively be reduced by forming good loess hole wall.
Description
Technical field
The present invention relates to the construction method technical field of bored concrete pile, specifically for, the present invention is one kind not aqueous
The stratum such as circle gravel, cobble, fine sand and miscellaneous fill in loess retaining wall do the construction method of operation pore-creating filling pile.
Background technology
At present, cast-in-situ bored pile is the very extensive construction technology of an application in China's engineering construction, especially as
Subway is increasingly used in all kinds of bright in each metropolitan fast development in China, a part of the stake as support system
Pattern foundation pit supporting structure is dug, a large amount of promotion and application have in addition also been obtained in railway, highway and building engineering.Without underground
Doing operation pore-forming using all kinds of churning drivens in the stratum of water becomes the main method of pouring pile hole, still, since drilling fills
Note that pile driving construction process is more and to expose the aerial time longer for stake holes after pore-forming, water-free round gravel, cobble, fine sand and
In the stratum such as miscellaneous fill in stake pore forming process and after pore-forming, existing cast-in-place pile construction method frequently results in hole wall collapse etc. and asks
Topic.In addition, conventional mud construction method can cause environmental pollution.
Therefore, it how under the premise of the economy and high efficiency for ensureing construction, avoids hole wall collapse, ensure pore-forming safety
And hole quality, the emphasis for becoming the technical issues of those skilled in the art are urgently to be resolved hurrily and studying always.
Invention content
It is easily led to solve the cast-in-place pile construction method in the stratum such as water-free round gravel, cobble, fine sand and miscellaneous fill
The problem of causing hole wall collapse, the present invention innovatively propose the construction method that a kind of loess retaining wall does operation pore-creating filling pile, should
Construction method uses loess as the retaining wall in dry operation pore forming process, the problem of not only efficiently avoiding hole wall collapse, and
And the loess after use is easily cleared up, and efficiently avoids polluting the environment.
To realize above-mentioned technical purpose, the invention discloses the construction parties that a kind of loess retaining wall does operation pore-creating filling pile
Method, the construction method include the following steps,
Step 1, first time measure of pile position setting-out is carried out, to determine the center of stake；
Step 2, casing is buried, the axle center of casing is made to pass through the center of stake, and the casing is perpendicular to the ground；
Step 3, the drill bit of rotary drilling rig is enabled to be directed at the center of the stake, the is carried out to underground by the rotary drilling rig
Primary drilling, until creeping into the position of designed elevation, to form the first drilling；
Step 4, loess is backfilled in first drilling by back-filling in layers mode, using rotation during backfill
Drilling machine inversion mode is dug to be tamped；
Step 5, second of measure of pile position setting-out is carried out, to determine the center of stake；
Step 6, the drill bit of rotary drilling rig is enabled to be directed at the center of the stake, the is carried out to underground by the rotary drilling rig
Secondary drilling, so that the loess forms loess retaining wall in the inner surface of the described second drilling, until creeping into designed elevation
Position, to form the second drilling；
Step 7, the step of borehole cleaning, inspection hole and pore-forming are checked and accepted is carried out；
Step 8, the steel reinforcement cage for keeping plumbness is transferred to the described second drilling；
Step 9, the continuous pouring concrete into the described second drilling, and casing is extracted after the completion of concreting, into
Bored concrete pile is formed after row concrete curing.
The present invention, by controlling rate of penetration, glues in entire construction method in drilling process using yellow (viscous) soil is good
Knot property, forms a kind of Huang (viscous) Tu Bi on sandy gravel surface, under the protection of yellow (viscous) native retaining wall, until drilling is deep to design
Degree.First time collapse hole position can not only be filled by yellow (viscous) native retaining wall, secondary drilling collapse hole wind can also be controlled well
Danger, effectively reduces expending die, reduces cost；The present invention is advantageous to environmental protection without mud emission, especially suitable for environment
Protect more demanding area construction；And spoir is convenient, and the native slag dug out, automobile can be transported directly, avoid live miriness
Change.In addition, the entire construction process based on the present invention, the present invention also has the advantages that pore-forming expending die is low, and general control exists
Between 1.0~1.1；And loess used in present invention drilling backfill may be reused 2-3 times.
Further, in step 1, setting-out is carried out to the center of stake by total station instrument coordinate method, in the stake
Ground will be vertically squeezed into, and the surrounding in stake position sets fender pile, then carries out stake for the reinforcing bar of label on heart position
Position repetition measurement.
Further, in step 1, the step of further including correct rotary drilling rig in place, after rotary drilling rig reaches predeterminated position,
Enable the drill bit align piles position center of rotary drilling rig, and the verticality of body verticality, drilling rod verticality and the reinforcing bar for label
It is identical.
Further, in step 2, casing is buried, and the casing is protected for one-piece steel using rotary drilling rig static pressure method
Cylinder, wall thickness is 5~8cm, is highly 3m, internal diameter 180cm, casing it is suitable for reading be respectively welded with the outside at middle part together with put more energy into
Rib.
Further, in step 3, by rotary drilling rig to underground carry out for the first time creep into when, apart from 5~8m of aperture sections
Rotary digging during drilling bit of rotary-digging drilling rig verticality monitored, and having deviation to be entangled in time by the control panel of rotary drilling rig
Just.
Further, in step 4, the described first drilling is repeatedly backfilled, it is anti-by rotary drilling rig after backfill every time
The mode of turning is tamped, if drilling bit of rotary-digging drilling rig drops down onto no longer natural depression, this compacting on the native face after this backfill
Terminate.
Further, in step 4, preset height is backfilled every time, and loess is backfilled to the position of the following pre-determined distance in aperture
It puts, wherein, 50cm≤preset height≤70cm, 2m≤pre-determined distance≤4m.
Further, in step 5, setting-out carries out the center of stake by total station instrument coordinate method, and after setting-out
The surrounding setting fender pile of stake position, then carries out stake position repetition measurement.
Further, in step 7, borehole cleaning is carried out in a manner that bucket fishes for sediment repeatedly, hole device is examined by cage and is examined
Gaging hole diameter, the verticality and hole depth in hole, and enter step 8 after pore-forming acceptance(check).
Further, in step 9, by catheterized reperfusion concrete, and first pipe laying depth is more than 0.8m, filling process
Middle depth of tremie is more than 2m, and conduit is extracted after the completion of concreting.
Beneficial effects of the present invention are：Present invention innovation is irrigated stake into holes protecting wall using loess, is protected with existing mud
Wall is compared, and loess retaining wall effectively can avoid ground environment from polluting, and there is pore forming process technology to require, and low, difficulty of construction is small, bores
The super side of concrete can be measured control about 5% into outstanding advantages of speed is fast, precision is high, being formed after good loess hole wall
(under the conditions of mud off, 20%) average side's amount super per pile concrete reaches about.Therefore, compared with prior art, the present invention
Operating expenses, with good economic efficiency and social benefit can be substantially reduced.
Economic benefit：The loess retaining wall of the present invention does the construction method of operation pore-forming to surrounding enviroment less pollution, by dividing
Analysis data show that the engineering method can not only save a large amount of concrete.And the engineering method can be largely avoided after excavation of foundation pit due to stake
Body invades limit and cuts the increases such as artificial, the economic and time cost brought.
Social benefit：The present invention ensure that construction quality and construction speed, together while solving problem of environmental pollution
When explored to do operation pore-creating filling pile (except friction pile or combine all kinds of composite piles of friction pile function) construction under the conditions of similar
A kind of new construction method is gone out, has had many advantages, such as that social benefit is notable.
Description of the drawings
Fig. 1 is the flow diagram for the construction method that loess retaining wall does operation pore-creating filling pile.
Specific embodiment
Loess retaining wall of the present invention is done with reference to the accompanying drawings of the specification the construction method of operation pore-creating filling pile into
The detailed explanation and illustration of row.
As shown in Figure 1, the invention particularly discloses the construction method that a kind of loess retaining wall does operation pore-creating filling pile, sheets
Invention is suitable for circle gravel, cobble, fine sand and miscellaneous fill etc. without highway, railway, bridge, water conservancy, the room under underground water formation condition
The bored pile construction of room building, municipal public engineering etc. needs to ensure sufficient loess supply before construction, and mill can be used in drilling machine
Resistive drilling rod rotary drilling rig, 70 meters of maximum drilling depth, maximum drilling diameter are more than 2.5 meters, and can 2000 meters of height above sea level with
It constructs under conditions of upper, 40 degree of 20~﹢ of environment temperature ﹣.Specifically, which includes the following steps.
Step 1, first time measure of pile position setting-out is carried out, to determine the center of stake；In the present embodiment, pass through total powerstation
Coordinate method carries out setting-out to the center of stake, and ground will be vertically squeezed into for the reinforcing bar of label on the center of stake, this
In embodiment, which is 10mm, length is 35~40cm, and the surrounding in stake position sets fender pile, Ran Houjin
Row stake position repetition measurement, thus by control errors within 5mm；Then it marks around stake position, can not only be prevented convenient for finding
Stake point is destroyed during mechanical displacement.In addition, in this step, the step of further including correct rotary drilling rig in place, rotary drilling rig reaches pre-
If behind position, enable the drill bit align piles position center of rotary drilling rig, and body verticality, drilling rod verticality and the reinforcing bar for label
Verticality it is identical.Base plate of rotary drill rig is telescopic automatic leveling device, and has instrument accurately to show electronics in operating room
Reading, when drill bit align piles position central cross line, each item data can lock, and not need to adjust again.Drilling machine in place after drill bit
Center and pile center's reply are just accurate, and control errors are in 2cm.
Step 2, casing is buried, the axle center of casing is made to pass through the center of stake, and casing is perpendicular to the ground；In the present invention
Act as spud pile position, guiding drill bit direction and the isolation surface flow of casing enter in hole, and hole wall is protected not cave in, ensures pore-forming
Quality.In the present embodiment before embedded casing, smooth, padded, removing sundries, using rotary drilling rig static pressure is carried out to place first
Method buries casing, and casing is one-piece steel casing, and wall thickness is 5~8cm, is highly 3m, internal diameter 180cm, casing
It is suitable for reading be respectively welded with the outside at middle part together with ribbed stiffener, so as to the present invention can increase the rigidity of casing, prevent from being used in turn
In deformation.Stake position centrally through four control fender piles is led back again after shield-tube embedment, casing center is made to be overlapped with stake position center,
And with red paint mark fender pile direction line position on casing.The deviation of confirmed casing plan-position is not more than 50mm, tilts
The deviation of degree is not more than 1%, its surrounding with clay is tamped, prepares the construction of next process.
Step 3, first time drilling is carried out under the conditions of in situ matter：The center of the drill bit align piles of rotary drilling rig is enabled,
First time drilling is carried out to underground by the rotary drilling rig, until drilling drills to the position of designed elevation to form first；
When it is implemented, after drilling machine is in place accurate, that is, start to creep into, per footage per round trip, control in 60cm or so, just starts during drilling
Slow down rotary digging speed, and notice putting that bucket is steady, lift bucket is slow, pass through rotary digging during 5~8m of aperture sections of rotary digging
The control panel monitoring drilling bit of rotary-digging drilling rig verticality of drilling machine, and thering is deviation to be corrected in time；Meanwhile it carries out in whole process
Drilling time log.When footage per round trip is completed to promote drill bit, the soil in bucket fans door closure under Gravitative Loads by two, prevents soil from falling
Enter in hole.After going out aperture, by spring spiro rod on platen Pressing drill on drilling rod, hinge door is made to be opened to out in bucket native.In addition,
The present invention does not need to modify pile body after excavation of foundation pit substantially.
Step 4, loess is backfilled in the first drilling by back-filling in layers mode, churning driven is used during backfill
Machine inversion mode is tamped；It in the present embodiment, is carried out with loading machine and drilling machine when stake holes loess loads, loading machine is responsible for
It bankets, drilling machine is responsible for loess compacting；To first drilling repeatedly backfilled, every time backfill after by rotary drilling rig inversion mode into
Row compacting, if drilling bit of rotary-digging drilling rig drops down onto no longer natural depression, this compacting on the native face after this backfill and terminates, and not
It must pressurize excessive, in order to avoid cause hole wall collapse or loess is caused to become spongy soil；In the present embodiment, preset height is backfilled every time,
And loess is backfilled to the position of the following pre-determined distance in aperture, wherein, 50cm≤preset height≤70cm, 2m≤pre-determined distance≤
4m, preset height ≈ 60cm, pre-determined distance ≈ 3m in the present embodiment.In addition, it is necessary to illustrate, used in the present embodiment
Loess be the loess for best suiting actual requirement that selects according to practical geological conditions and after field test compares, than
Such as, the loess of plasticity (liquidity index 0.25~0.75) or soft plasticity (liquidity index 0.75~1).In addition, loess can be
It is reused under the premise of meeting plasticity requirements, it is general 2-3 times reusable.
Step 5, second of measure of pile position setting-out is carried out, to determine the center of stake；It is similar with step 1, the present embodiment
In, setting-out is carried out, and set and protect in the surrounding of stake position after setting-out to the center of stake by total station instrument coordinate method
Then stake carries out stake position repetition measurement.
Step 6, second is carried out under the geological conditions for having been filled with loess to creep into：Enable the drill bit align piles of rotary drilling rig
Center carries out second to underground by the rotary drilling rig and creeps into, and drilling and forming hole method, speed and requirement are the same as the first time
Drilling, to form the second drilling, using the good caking property of loess in drilling process, so that interior table of the loess in the second drilling
Face (such as sandy gravel surface) forms loess retaining wall, until drilling is to the position of designed elevation under the protection of loess retaining wall, so,
The present invention can be effectively reduced collapse hole rate in secondary pore-forming, effectively reduce expending die, reduce cost, reduce concrete
Superfilled amount and the workload that cuts of later stage pile body.In addition, hole wall is avoided collision in second of drilling process, in order to avoid cause
Molding loess hole wall collapse.
Step 7, the step of borehole cleaning, inspection hole and pore-forming are checked and accepted is carried out, it is specific as follows.
Borehole cleaning：It is high according to the designed elevation at bored piles bottom and casing top mark, drilling depth is calculated, with lining rope detection hole
It is deep, carry out borehole cleaning afterwards in place.Borehole cleaning fishes for sediment repeatedly using bucket, until its thickness meets specification and design requirement, ensures
Indices after borehole cleaning meet the needs of the practical geological condition in scene.
Examine hole：The main verticality and hole depth for checking aperture, hole.The present embodiment is using cage inspection hole device detection.Examine hole device
It is made of the steel bar meter of ф 22, outer diameter is equal to design stake diameter (D), length 4Dm.During detection, inspection hole device is sling, survey
The zero of rope lies in the top of inspection hole device, and the center at the center of inspection hole device, the center in hole and hoisting wirerope is made to be in same lead
It on vertical line, is slowly put into hole, its lowered position is judged plus the length of inspection hole device by the scale of lining rope.It is if unimpeded up and down
It is without hindrance to show drilled pile hole quality qualification, be hampered as halfway until bottom hole, show there is undergauge or hole to tilt at the position that is hampered
Phenomenon then needs that drill bit is descended to handle again.
Step 8, the steel reinforcement cage for keeping plumbness is transferred to the second drilling；In addition, in steel reinforcement cage installation process
Hole wall is avoided collision, in order to avoid cause molding loess hole wall collapse.It is tight in terms of fabrication of reinforcing cage in the present embodiment
Lattice control, and emphasis is steel reinforcement cage outer diameter and straightness, and the welding quality in main reinforcement overlap joint muscle in length and breadth crosspoint has to comply with design will
It asks.For this purpose, to check the setting of steel bar cage protecting layer cushion block, cushion block is put using cylindrical mortar pad along steel reinforcement cage every 2m
One group is put, every group of setting 4 uniformly places by 90 °, cage body can both have been avoided to collide hole wall, ensured that concrete cover is equal
Position of the even and steel reinforcement cage in pile body is correct.3 points of liftings are answered in the lifting of steel reinforcement cage, and lorhumb line is kept to overlap.When entering hole, always
Plumbness need to be kept, alignment hole position is put down gently slowly, and 2 people can be arranged to buttress steel reinforcement cage in the process, is kept stablizing, is avoided collision hole
Wall ascertains the reason immediately once being hampered, and forbids shaking and impact is transferred by force.
Step 9, the continuous pouring concrete into the second drilling, and casing is extracted after the completion of concreting, it is mixed
Bored concrete pile is formed after solidifying soil maintenance；In the present embodiment, by catheterized reperfusion concrete, and first pipe laying depth is more than 0.8m,
Depth of tremie is more than 2m in filling process, and conduit is extracted after the completion of concreting.It to be avoided in conduit hoisting process
Hole wall is collided, in order to avoid cause molding loess hole wall collapse.The necessary moderate length of conduit, ensures that bottom end is not more than away from bottom hole
2m；In addition, when concrete opens filling, the utensil that vibrates is got out, accomplishes that stake top 5m ranges are no more than 1.5m by every layer and consolidate；Coagulation
Before soil perfusion terminates, top of concrete absolute altitude is measured, design stake top absolute altitude 200mm should be higher by, superfilled part concrete is in Guan Liang
It is cut before construction, but pile crown concrete strength must reach design requirement.
The present invention is compared by multiple test pile, it is determined that the economy and reliability of engineering method construction, not aqueous
The stratum such as circle gravel, cobble, fine sand and miscellaneous fill in carry out dry operation drilling construction etc. under the conditions of, it is serious to solve pore-forming collapse hole
The problem of provide reference value, inner support and stake is added to add what the retaining designs large area such as anchor cable was popularized in open-cut foundation ditch fender post
Today, the present invention will have vast potential for future development.
In the description of this specification, reference term " the present embodiment ", " some embodiments ", " is shown " one embodiment "
The description of example ", " specific example " or " some examples " etc. mean to combine the specific features of the embodiment or example description, structure,
Material or feature are contained at least one embodiment of the present invention or example.In the present specification, above-mentioned term is shown
The statement of meaning property is necessarily directed to identical embodiment or example.Moreover, specific features, structure, material or the spy of description
Point may be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other,
Those skilled in the art can be by the different embodiments or examples described in this specification and different embodiments or examples
Feature is combined.Moreover, it relates to represent " more " of quantity, it is thus understood that " >=2 ", for example, " multiple " table
Show " at least twice " etc..
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
Any modification, equivalent replacement and simple modifications for being made in content etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of loess retaining wall does the construction method of operation pore-creating filling pile, it is characterised in that：The construction method includes as follows
Step,
Step 1, first time measure of pile position setting-out is carried out, to determine the center of stake；
Step 2, casing is buried, the axle center of casing is made to pass through the center of stake, and the casing is perpendicular to the ground；
Step 3, the drill bit of rotary drilling rig is enabled to be directed at the center of the stake, is carried out for the first time to underground by the rotary drilling rig
Drilling, until drilling is drilled to the position of designed elevation with forming first；
Step 4, loess is backfilled in first drilling by back-filling in layers mode, churning driven is used during backfill
Machine inversion mode is tamped；
Step 5, second of measure of pile position setting-out is carried out, to determine the center of stake；
Step 6, the drill bit of rotary drilling rig is enabled to be directed at the center of the stake, is carried out second to underground by the rotary drilling rig
Drilling, so that the loess forms loess retaining wall in the inner surface of the described second drilling, until creep into the position of designed elevation,
To form the second drilling；
Step 7, the step of borehole cleaning, inspection hole and pore-forming are checked and accepted is carried out；
Step 8, the steel reinforcement cage for keeping plumbness is transferred to the described second drilling；
Step 9, the continuous pouring concrete into the described second drilling, and casing is extracted after the completion of concreting, it is mixed
Bored concrete pile is formed after solidifying soil maintenance.
2. loess retaining wall according to claim 1 does the construction method of operation pore-creating filling pile, it is characterised in that：
In step 1, setting-out is carried out to the center of stake by total station instrument coordinate method, will be used on the center of the stake
The reinforcing bar of label vertically squeezes into ground, and the surrounding in stake position sets fender pile, then carries out stake position repetition measurement.
3. loess retaining wall according to claim 2 does the construction method of operation pore-creating filling pile, it is characterised in that：
In step 1, the step of further including correct rotary drilling rig in place, after rotary drilling rig reaches predeterminated position, rotary drilling rig is enabled
Drill bit align piles position center, and body verticality, drilling rod verticality and verticality for the reinforcing bar of label are identical.
4. loess retaining wall according to claim 3 does the construction method of operation pore-creating filling pile, it is characterised in that：
In step 2, casing is buried using rotary drilling rig static pressure method, and the casing is one-piece steel casing, wall thickness for 5~
8cm, highly for 3m, internal diameter 180cm, casing it is suitable for reading be respectively welded with the outside at middle part together with ribbed stiffener.
5. loess retaining wall according to claim 4 does the construction method of operation pore-creating filling pile, it is characterised in that：
In step 3, by rotary drilling rig to underground carry out for the first time creep into when, during 5~8m of aperture sections of rotary digging
Drilling bit of rotary-digging drilling rig verticality is monitored, and having deviation to be corrected in time by the control panel of rotary drilling rig.
6. loess retaining wall according to claim 5 does the construction method of operation pore-creating filling pile, it is characterised in that：
In step 4, the described first drilling is repeatedly backfilled, is rammed after backfill by rotary drilling rig inversion mode every time
It is real, if drilling bit of rotary-digging drilling rig drops down onto no longer natural depression, this compacting on the native face after this backfill and terminates.
7. loess retaining wall according to claim 6 does the construction method of operation pore-creating filling pile, it is characterised in that：
In step 4, preset height is backfilled every time, and loess is backfilled to the position of the following pre-determined distance in aperture, wherein, 50cm≤
Preset height≤70cm, 2m≤pre-determined distance≤4m.
8. loess retaining wall according to claim 7 does the construction method of operation pore-creating filling pile, it is characterised in that：
In step 5, setting-out is carried out, and the four of stake position after setting-out to the center of stake by total station instrument coordinate method
Week setting fender pile, then carries out stake position repetition measurement.
9. loess retaining wall according to claim 8 does the construction method of operation pore-creating filling pile, it is characterised in that：
In step 7, borehole cleaning is carried out in a manner that bucket fishes for sediment repeatedly, by cage examine hole device detect aperture, hole hang down
Straight degree and hole depth, and enter step 8 after pore-forming acceptance(check).
10. loess retaining wall according to claim 9 does the construction method of operation pore-creating filling pile, it is characterised in that：
In step 9, by catheterized reperfusion concrete, and first pipe laying depth is more than 0.8m, and depth of tremie is big in filling process
In 2m, and conduit is extracted after the completion of concreting.
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| CN108643171A (en) * | 2018-06-21 | 2018-10-12 | 中交公局第六工程有限公司 | A kind of pile foundation dry hole uses the construction method of tremie concrete |
| CN109113050A (en) * | 2018-09-19 | 2019-01-01 | 邹延辉 | A kind of construction method of concrete vibroflotation composite pile |
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| CN110185386A (en) * | 2019-06-27 | 2019-08-30 | 四川公路桥梁建设集团有限公司 | Rotary-digging rapid hole forming method for concrete retaining wall of loose accumulation body stratum |
| CN111441342A (en) * | 2020-03-25 | 2020-07-24 | 中国建筑第五工程局有限公司 | Drilling machine based on crossed dense-tooth drill bits and construction method of cast-in-place pile of drilling machine |
| CN112144514A (en) * | 2020-09-30 | 2020-12-29 | 北京建材地质工程有限公司 | Simple method for forming hole and pile in sand and pebble stratum easy to collapse during rotary drilling machine |
| CN112459045A (en) * | 2020-12-01 | 2021-03-09 | 南京深地智能建造技术研究院有限公司 | Construction process of rotary digging hole-forming construction method pile |
| CN114263156A (en) * | 2021-12-29 | 2022-04-01 | 中铁十二局集团建筑安装工程有限公司 | Construction method of deep-miscellaneous soil filling support pile |
| CN114855776A (en) * | 2022-06-09 | 2022-08-05 | 中国十七冶集团有限公司 | End-bearing type cast-in-situ bored pile construction method for dry-process pore forming through powder sand layer |
| CN115094886A (en) * | 2022-07-22 | 2022-09-23 | 陕西建工机械施工集团有限公司 | Construction method of C9 type lock catch steel pipe pile |
| CN115680007A (en) * | 2022-12-10 | 2023-02-03 | 中建七局交通建设有限公司 | Pile group construction method suitable for complex geology of mountain area |
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Application publication date: 20180612 |