CN108612087A - A kind of novel long screw auger pore pressure fills the construction technology of support pile - Google Patents
A kind of novel long screw auger pore pressure fills the construction technology of support pile Download PDFInfo
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- CN108612087A CN108612087A CN201810445160.5A CN201810445160A CN108612087A CN 108612087 A CN108612087 A CN 108612087A CN 201810445160 A CN201810445160 A CN 201810445160A CN 108612087 A CN108612087 A CN 108612087A
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- pile
- concrete
- reinforcement cage
- drilling machine
- steel reinforcement
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Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/36—Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/56—Screw piles
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
Abstract
The present invention relates to the construction technologies that a kind of novel long screw auger pore pressure fills support pile, specifically include following steps：(1) stake position measuring：Boundary of works area is determined by design drawing scene, measures axial line control point, and is reported management to check and accept after signature is approved and started to put stake position；With total powerstation measuring stake position, and perform record, verification, reinspection and examination；(2) pore-forming：It is drilled using drilling machine, is drilled into the depth and soil layer of design requirement；(3) concrete pumping material pile：It is completed by pipeline continuous conveying concrete to pile using ground pump, then drilling rod is promoted to ground；(4) making of steel reinforcement cage：First the spacing of main reinforcement is arranged, firmly reinforcing rib to be fixed, after main reinforcement is welded and fixed with muscle, then spot welding spiral bar；(5) underthrust steel reinforcement cage is constructed；(6) pile body conserves：Natural curing is carried out to the pile body after pile, and shifts drilling machine to next to be onstructed.The construction technology of the support pile is simple, and safe and reliable and controllable, repeatability is high, is suitble to be widely popularized.
Description
Technical field
The present invention relates to the constructions that piling Technology field more particularly to a kind of novel long screw auger pore pressure fill support pile
Technique.
Background technology
Pattern foundation pit supporting structure is to ensure the safety of Underground Construction and foundation pit surrounding enviroment, to foundation pit side-wall and peripheral ring
Supporting and retaining system, reinforcing and the safeguard measure that border uses；People's Republic of China's professional standard《Building foundation pit supporting technical regulation》
JGJ120-2012 is defined as follows pattern foundation pit supporting structure：It is right for the safety of main structure construction under protecting field and foundation pit surrounding enviroment
Foundation pit use provisional supporting and retaining system, reinforcing, protection and Groundwater Control measure.Different zones geological conditions its feature also not phase
Together.Foundation pit supporting project is the subject that geotechnical engineering, Structural Engineering and construction technology cross one another again, is Various Complex factor
The system engineering of reciprocal effect is the complex art subject for theoretically waiting development.Foundation pit supporting project positive big depth, big face
Product direction is developed, and some length and widths are more than over one hundred rice, and depth is more than more than 20 rice.Project scale increasingly increases.Ground
Matter is ever-changing, complexity, the inhomogeneities of geology mode of occurence and hydrogeologic condition, often results in the data of prospecting gained
Discreteness is very big, it is difficult to represent the general status of soil layer, and accuracy is relatively low, the design and construction to foundation pit supporting project increase
Difficulty is added.Excavation pit under the conditions of weak soil, phreatic high and other complex sites, it is easy to generate soil body slipping, base
It is native so that the diseases such as breakage to cheat unstability, pile body displacement, bottom heave, the serious leak of retaining structure, stream, to surrounding building,
The safety of lower structures and pipeline causes very big threat.Engineering practice proves, to carry out foundation pit supporting project, it is necessary to including entire
The overall process of excavation supporting, it includes the entire series such as prospecting, design, construction and monitoring, thus emphasizes to carry out meticulously
The work of each link.Since foundation pit supporting project cost is high, the quantity that goes into operation is more, is the emphasis of each unit in charge of construction's contention, and by
In technical sophistication, coverage is wide, and changing factor is more, and accident is frequent, is most challenging technical in architectural engineering
Difficult point, while being also to reduce project cost, it is ensured that the emphasis of construction quality.
Therefore, it is now necessary to which developing one kind can be safe and reliable, easy for construction, and can effectively control the branch of hole quality
The construction technology of fender pile.
Invention content
The technical problem to be solved by the present invention is to providing one kind can be safe and reliable, easy for construction, and can effectively control into
The novel long screw auger pore pressure of hole quality fills the construction technology of support pile.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：The novel long screw auger pore pressure fills supporting
The construction technology of stake, specifically includes following steps：
(1) stake position measuring：
Boundary of works area is determined by design drawing scene, measures axial line control point, and is reported management to check and accept after signature is approved and opened
Beginning puts stake position；With total powerstation measuring stake position, and perform record, verification, reinspection and examination；
(2) pore-forming：It is drilled using drilling machine, is drilled into the depth and soil layer of design requirement；
(3) concrete pumping material pile：It is completed by pipeline continuous conveying concrete to pile using ground pump, then drilling rod is promoted
To ground；
(4) making of steel reinforcement cage：First the spacing of main reinforcement is arranged, firmly reinforcing rib, main reinforcement to be fixed are welded and fixed with muscle
Afterwards, then spot welding spiral bar；
(5) underthrust steel reinforcement cage is constructed：
S51：Using drilling machine from the steel reinforcement cage that step (4) is made under extension vibration hammer, and opened in three minutes after concrete pouring
Begin to insert cage；
S52：After long-spiral drilling machine pore-forming, concrete perfusion to ground form bored concrete pile, that is, steel reinforcement cage construction is inserted after carrying out；
The qualified steel reinforcement cage of inspection is sleeved on above steel pipe, and is hung on the hook for being set to flange with steel wire rope；S53：Pedrail crane
Vibration hammer, steel pipe and steel reinforcement cage are lifted by crane, makes steel reinforcement cage align piles position center, Vibration on Start-up hammer, steel pipe is vibrated to be downwardly into stake
In the concrete of hole, with steel reinforcement cage together underthrust, control steel reinforcement cage top mark is high, under be inserted into design position after close vibration hammer electricity
Steel wire rope is finally taken in source, steel pipe and vibration hammer is proposed outside hole with long-spiral drilling machine, often proposing 3 meters of unlatchings during proposing shakes
Dynamic hammer is primary；
(6) pile body conserves：Natural curing is carried out to the pile body after pile, and shifts drilling machine to next to be onstructed.
Using above-mentioned technical proposal, pass through the measuring of stake position, pore-forming, concrete pumping material pile, the making of steel reinforcement cage, underthrust reinforcing bar
The support pile of high quality is formed after cage construction, pile body maintenance, the construction technology which fills support pile is simple,
Safe and reliable and controllable, repeatability is high, is suitble to be widely popularized.Wherein, total powerstation measuring stake position is used in step (1), and is made easy to remember
Record, verification, reinspection, by construction unit, supervisor's onsite acceptance；The processing site of steel reinforcement cage should select transporting in step (4)
It is defeated, the eaily place such as make；Type, model and the dimensions of reinforcing bar should meet design requirement；It is answered after the entering of reinforcing steel bar
It is stacked respectively by the different model of reinforcing bar, different-diameter, different length；Steel Reinforcing Bar Material figure is drawn according to design drawing arrangement of reinforcement, as possible
Accomplish economy, descends waste material less；Steel reinforcement cage grows the requirement that should meet design drawing with arrangement of reinforcement specification；Using brill in step (5)
Machine immediately begins to insert cage in three minutes after concrete pouring, reduces the time difference, reduce and insert cage difficulty from vibration hammer descending reinforcing cage is hung；With
Long-spiral drilling machine proposes steel pipe and vibration hammer outside hole, and it is primary that 3 meters of unlatching vibration hammers are often carried during proposing；To ensure concrete
Density.
The present invention further improvement lies in that, further include step (7) detection：Concrete perfusion pile driving construction finishes natural curing 28
It is detected after it.Unit is detected by third party and is detected experiment.
The present invention further improvement lies in that, further include that stake position timber, iron nail mark, and add in the step (1)
With protection, so that construction stake position positions.
The present invention further improvement lies in that, step (2) pore-forming specifically comprises the following steps：
S21：After drilling machine is marched into the arena, rack and drilling rod are installed according to depth of pore forming, is connected firmly, is constructing between drilling rod
Middle running check is fastened in time if any loosening；
S22：After drilling machine is in place, preliminary examination is carried out, bit central and pile position deviation are less than 20mm, then adjust drilling machine, with double
The good drilling rod verticality of plumb bob double-direction control can steadily be crept into after qualified；When drill bit has just contacted ground, drill bit envelope is first first closed
Mouthful, running speed is slow；
S23：Normal rate of penetration can be controlled in 1~1.50m/min, in drilling process, such as encounters bit freezing, drilling machine shakes
It shakes, offset, brill should be stopped and ascertained the reason, drilling is can continue after taking corrective action；
S24：The earthwork that cleaning drilling machine drills out in time, and be uniformly transferred to specified place and stack；
S25：It creeps into the depth and soil layer of design requirement, concrete construction can be irrigated by inspection.
The present invention further improvement lies in that, the step (3) specifically comprises the following steps：
S31：Ground pump is placed on rational position, and reduces the pipeline of bend pipe delivering concrete, coagulation is conveyed with profit
Soil；
S32：Pump concrete is kept to be carried out continuously in formation of pile, the concrete height in ground pump hopper must not be less than
40cm prevents inspiration air from causing plugging；
S33：After the completion of pile, remaining concrete in drilling rod and hose is removed in time；
S34：Behind long-spiral drilling machine end hole, quick connection flexible pipe and ground pump, and in first pump concrete, be first pumped into
A small amount of cement mortar moistens pipeline；
S35：When promotion drilling rod connecting is near the ground, slows down and put forward pipe speed and clear up aperture dregs in time, to ensure that pile crown is mixed
Solidifying soil property amount.
The present invention further improvement lies in that, in the step (4) in the manufacturing process of steel reinforcement cage main reinforcement overlap joint using single
Face overlap welding, weld length 10d, and ensure main reinforcement concentricity；The spiral bar upper and lower ends 3m ranges use weldering of working to the last minute, remaining
It is welded using interval.
The present invention further improvement lies in that, in the step (5) the lower mouth of steel reinforcement cage be close up, closing in height 0.5m, and
Annular is welded at closing in put more energy into muscle.To meet vibrated power demand, it is welded with annular at closing in and puts more energy into muscle.
The present invention further improvement lies in that, in the step S25 when drilling machine creep into design hole depth when, answer original place dally 5
It can stop to bore after second.
The present invention further improvement lies in that, the main reinforcement and annular of the steel reinforcement cage in step S51 in the step (5)
Muscle of putting more energy into uses single-selded lap joint；Slump in the step S52 when concrete perfusion should control 180~
220mm；The perpendicularity deviation of the bored concrete pile must not exceed 1% long；Drilling rod when concrete perfusion promotes speed should be with pump
Speed is sent to match, perfusion promotes speed control within 2.5m/min, to being perfused the stake finished, before non-pressing reinforcing cage, stake
Position will be protected；Insertion speed is preferably controlled in 1.2~1.5m/min in the step S53.
Compared with prior art, the invention has the advantages that：By the measuring of stake position, pore-forming, concrete pumping material pile,
The support pile of high quality, the novel long screw auger are formed after making, the construction of underthrust steel reinforcement cage, pile body maintenance and the detection of steel reinforcement cage
The construction technology that pore pressure fills support pile is simple, and safe and reliable and controllable, repeatability is high, is suitble to be widely popularized.
Description of the drawings
Technical scheme of the present invention is further described below in conjunction with the accompanying drawings：
Fig. 1 is the construction technology structure chart that the novel long screw auger pore pressure of the present invention fills support pile.
Specific implementation mode
In order to deepen the understanding of the present invention, the present invention is done below in conjunction with drawings and examples and is further retouched in detail
It states, the embodiment is only for explaining the present invention, does not constitute and limits to protection scope of the present invention.
Embodiment：As shown in Figure 1, the novel long screw auger pore pressure fills the construction technology of support pile, following step is specifically included
Suddenly：
(1) stake position measuring：
Boundary of works area is determined by design drawing scene, measures axial line control point, and is reported management to check and accept after signature is approved and opened
Beginning puts stake position.With total powerstation measuring stake position, and record, verification, reinspection are performed, by construction unit, supervisor's onsite acceptance.
Stake position timber, iron nail are marked, and are protected, so that construction stake position positions.
(2) pore-forming：It is drilled using drilling machine, is drilled into the depth and soil layer of design requirement；
S21：After drilling machine is marched into the arena, rack and drilling rod are installed according to depth of pore forming, are connected firmly between drilling rod, in construction
Running check is fastened in time if any loosening；
S22：After drilling machine is in place, preliminary examination is carried out, bit central and pile position deviation are less than 20mm, then adjust drilling machine, with double
The good drilling rod verticality of plumb bob double-direction control can steadily be crept into after qualified；When drill bit has just contacted ground, drill bit envelope is first first closed
Mouthful, running speed is slow；
S23：Normal rate of penetration can be controlled in 1~1.50m/min, in drilling process, such as encounter bit freezing, drilling machine rocks,
Offset should stop brill and ascertain the reason, drilling is can continue after taking corrective action；
S24：The earthwork that drilling machine drills out is cleared up in time, and is uniformly transferred to the specified place of general contracting unit and is stacked；
S25：It creeps into the depth and soil layer of design requirement, concrete can be irrigated by, which being checked and accepted through site supervision person, applies
Work；
(3) concrete pumping material pile：It is completed by pipeline continuous conveying concrete to pile using ground pump, then drilling rod is promoted
To ground；
S31：Ground pump riding position should be reasonable, and the pipeline of delivering concrete reduces bend pipe to the greatest extent, with sharp delivering concrete；
S32：Pump concrete should be carried out continuously, and the concrete height in ground pump hopper must not generally be less than 40cm, prevent
Inspiration air causes plugging；
S33：After the completion of pile, remaining concrete in drilling rod and hose is removed in time；
S34：Behind long-spiral drilling machine end hole, the speed of connection flexible pipe and ground pump is fast, when first pump concrete, preferably first pumps
Enter a small amount of cement mortar moistening pipeline；
S35：When promotion drilling rod connecting is near the ground, slows down and put forward pipe speed and clear up aperture dregs in time, to ensure pile crown coagulation
Soil property amount；
(4) making of steel reinforcement cage：Fabrication of reinforcing cage sequence generally first arranges the spacing of main reinforcement, to be fixed to live to reinforce
Stirrup, after main reinforcement is welded and fixed with stirrup, then spot welding tie hoop；It should be noted that：The processing site of steel reinforcement cage should select transporting
It is defeated, the eaily place such as make；Type, model and the dimensions of reinforcing bar should meet design requirement；It is answered after the entering of reinforcing steel bar
It is stacked respectively by the different model of reinforcing bar, different-diameter, different length；Steel Reinforcing Bar Material figure is drawn according to design drawing arrangement of reinforcement, as possible
Accomplish economy, descends waste material less；Steel reinforcement cage grows the requirement that should meet design drawing with arrangement of reinforcement specification；Main reinforcement overlap joint uses single side
Overlap welding, spreading degree 10d, and ensure main reinforcement concentricity；Spiral bar upper and lower ends 3m ranges are using weldering of working to the last minute, remaining is using interval
Weldering；
(5) underthrust steel reinforcement cage is constructed
S51：Using drilling machine from vibration hammer descending reinforcing cage is hung, immediately begins to insert cage in three minutes after concrete pouring, reduce the time
Difference reduces and inserts cage difficulty.
S52：After long-spiral drilling machine pore-forming, concrete perfusion to ground, steel reinforcement cage construction is inserted after carrying out immediately.It is closed examining
The steel reinforcement cage of lattice is sleeved on above steel pipe, is hung on the hook for being set to flange with steel wire rope above.Mouth closes up under steel reinforcement cage, closes up
Height 0.5m is welded with annular and puts more energy into muscle to meet vibrated power demand.
S53：Pedrail crane lifts by crane vibration hammer, steel pipe and steel reinforcement cage, and steel reinforcement cage align piles position center, Vibration on Start-up is made to hammer into shape,
Steel pipe is vibrated to be downwardly into stake holes concrete, and with steel reinforcement cage together underthrust, control steel reinforcement cage top mark is high, under be inserted into design
Vibration hammer power supply is closed behind position, finally takes steel wire rope, and steel pipe and vibration hammer are proposed outside hole with long-spiral drilling machine, proposed
It is primary that 3 meters of unlatching vibration hammers are often carried in journey, to ensure the density of concrete.
(6) pile body conserves：Natural curing is carried out to the pile body after pile, and shifts drilling machine to next to be onstructed；
(7) it detects：Concrete perfusion pile driving construction is detected after finishing 28 days, and detecting unit by third party is detected examination
It tests.
Key Quality Control in the work progress of the support pile：
(1) to all working measuring instruments, specified unit is periodically arrived by measuring requirement and is edited, all measurements
Instrument should use in the time limit as defined in assay approval certificate, in work progress, if it find that instrument error is excessive, deliver immediately
It repairs, and edits again, precision just uses after meeting the requirements.
(2) each measuring point mark of survey data that engineering has been surveyed all permanent stakes set and given to designing unit is checked
It checked, checked, survey will be mended by, which such as pinpointing the problems, reinforces, and shifting sets or surveys school again, and notifies designing unit and site supervision work
Cheng Shi.
(3) construction baseline, bench mark, measurement control point, are checked weekly primary.Before commencement of works, all measurements are checked
Control point, and reinforce carrying out protection.
(4) construction stake position is generally discharged using bamboo chip or steel bar end, and each stake position should indicate column bit number.
(5) drilling machine pore-forming
1) it is calibrated meticulously when drilling machine is in place, it is ensured that bit central and the error at stake holes center are not more than 20mm.
2) it uses plumb bob twocouese to control drilling rod verticality, drilling depth is controlled with the hole depth mark on drilling rod.
3) when drilling machine shifts, the control stake of stake position and the level stake of construction site should be protected.
4) when drilling to design hole depth, can stop to bore after answering original place to dally 5 seconds.
(6) fabrication of reinforcing cage
1) filling pile cage of reinforcement check evaluation criterion (mm).
1. steel reinforcement cage main reinforcement and muscle of putting more energy into use single-selded lap joint, electric welder must be on accredited (job that requires special skills pertinent certificate)
Hilllock, and being subjected within the limits prescribed when reinforcement welding, requires to construct, carry out in strict accordance with construction technology standard
Test weld must be carried out before reinforcement welding according to execution conditions, it can welding after qualified.
2. bar bender must conscientiously read design drawing, it is familiar with the requirements such as geometric dimension, the lapped length of steel bar of steel reinforcement cage.
3. steel reinforcement cage processing site is preferably smooth, the pad lumps of wood is levelling when screwing steel bars cage, and fabrication of reinforcing cage construction error meets
Quality standard.
2) concrete perfusion
1. the concrete marched into the arena must meet design and code requirement, slump should be controlled in 180~220mm,
The concrete of field test slump, unqualified requirement must not be used for this engineering.
2. in the construction process it is noted that stake machine levelness and leading truck of the adjustment for concrete and pressing reinforcing cage to be perfused are hung down
Straight degree, it is 1% long to ensure that the perpendicularity deviation of bored concrete pile must not exceed, pile position deviation meets design requirement.
3. bend pipe connecting portion avoids banjo connector occur in delivering concrete direction, and removes reducing joint in time
Residual concrete.
4. have special messenger to be responsible for observation pump pressure promotes situation with drilling machine, drilling rod, which promotes speed, to match with rate of pumping, fill
Note promotes speed control within 2.5m/min, forbids first to propose material filling after brill, it is ensured that pile quality, cast-in-place concrete pile top mark are high
Meet design requirement.
5. it was found that when concrete supply deficiency, drilling machine stopping is commanded to carry drilling rod immediately.If because other reasons cannot in construction
Continuous pouring, it is necessary to which piercing the 1~side 2m of concrete face or less again can be perfused, and according to the geological condition of exploration report and grasp, avoid
Saturated sand, powder soil horizon must not stop filling in these soil layers.
6. to being perfused the stake finished, before non-pressing reinforcing cage, stake position will be protected.
3) underthrust steel reinforcement cage
1. because steel reinforcement cage is longer, underthrust steel reinforcement cage must carry out two-way verticality observation, use bidirectional lines drawing close to successful conclusion vertical angle
Arrangement finds that perpendicularity deviation is excessive and notifies manipulator shuts down to correct in time, and lower cage operating personnel has answered the alignment of righting steel reinforcement cage
The stake position completed is perfused.
2. must first use vibration hammer and steel reinforcement cage dead weight to carry out static(al) indentation during lower cage, it is depressed into when can not be pressed into again
Vibration on Start-up is hammered into shape, prevents steel reinforcement cage offset, insertion speed caused by being vibrated by vibration hammer from preferably controlling in 1.2~1.5m/min.
3. to be protected to the stake finished has been perfused.
For the ordinary skill in the art, specific embodiment is only exemplarily described the present invention,
Obviously the present invention specific implementation is not subject to the restrictions described above, as long as use the inventive concept and technical scheme of the present invention into
The improvement of capable various unsubstantialities, or it is not improved by the present invention design and technical solution directly apply to other occasions
, within protection scope of the present invention.
Claims (9)
1. a kind of novel long screw auger pore pressure fills the construction technology of support pile, which is characterized in that specifically include following steps：
(1) stake position measuring：
Boundary of works area is determined by design drawing scene, measures axial line control point, and is reported management to check and accept after signature is approved and started to put
Stake position；With total powerstation measuring stake position, and perform record, verification, reinspection and examination；
(2) pore-forming：It is drilled using drilling machine, is drilled into the depth and soil layer of design requirement；
(3) concrete pumping material pile：It is completed by pipeline continuous conveying concrete to pile using ground pump, then drilling rod is promoted to ground
Face；
(4) making of steel reinforcement cage：First the spacing of main reinforcement is arranged, firmly reinforcing rib to be fixed, after main reinforcement is welded and fixed with muscle, then
Spot welding spiral bar；
(5) underthrust steel reinforcement cage is constructed：
S51：Using drilling machine from the steel reinforcement cage that step (4) is made under extension vibration hammer, and start to insert in three minutes after concrete pouring
Cage；
S52：After long-spiral drilling machine pore-forming, concrete perfusion to ground form bored concrete pile, that is, steel reinforcement cage construction is inserted after carrying out；Inspection
It tests qualified steel reinforcement cage to be sleeved on above steel pipe, and is hung on the hook for being set to flange with steel wire rope；
S53：Pedrail crane lifts by crane vibration hammer, steel pipe and steel reinforcement cage, makes steel reinforcement cage align piles position center, Vibration on Start-up hammer, steel pipe
Vibrated to be downwardly into stake holes concrete, with steel reinforcement cage together underthrust, control steel reinforcement cage top mark is high, under be inserted into design position
Vibration hammer power supply is closed afterwards, finally takes steel wire rope, steel pipe and vibration hammer is proposed outside hole with long-spiral drilling machine, during proposition
It is primary often to carry 3 meters of unlatching vibration hammers；
(6) pile body conserves：Natural curing is carried out to the pile body after pile, and shifts drilling machine to next to be onstructed.
2. novel long screw auger pore pressure according to claim 1 fills the construction technology of support pile, which is characterized in that further include
Step (7) detects：Concrete perfusion pile driving construction is detected after finishing natural curing 28 days.
3. novel long screw auger pore pressure according to claim 1 fills the construction technology of support pile, which is characterized in that the step
Suddenly further include that stake position timber, iron nail are marked, and be protected in (1), so that construction stake position positions.
4. novel long screw auger pore pressure according to claim 3 fills the construction technology of support pile, which is characterized in that the step
Suddenly (2) pore-forming specifically comprises the following steps：
S21：After drilling machine is marched into the arena, rack and drilling rod are installed according to depth of pore forming, is connected firmly between drilling rod, is passed through in construction
It often checks, is fastened in time if any loosening；
S22：After drilling machine is in place, preliminary examination is carried out, bit central is less than 20mm with pile position deviation, drilling machine is then adjusted, with double plumb bobs
The good drilling rod verticality of double-direction control can steadily be crept into after qualified；When drill bit has just contacted ground, drill bit sealing is first first closed, under
Drilling speed degree is slow；
S23：Normal rate of penetration can be controlled in 1~1.50m/min, in drilling process, such as encounters bit freezing, drilling machine rocks, partially
It moves, brill should be stopped and ascertained the reason, drilling is can continue after taking corrective action；
S24：The earthwork that cleaning drilling machine drills out in time, and be uniformly transferred to specified place and stack；
S25：It creeps into the depth and soil layer of design requirement, concrete construction can be irrigated by inspection.
5. novel long screw auger pore pressure according to claim 3 fills the construction technology of support pile, which is characterized in that the step
Suddenly (3) specifically comprise the following steps：
S31：Ground pump is placed on rational position, and reduces the pipeline of bend pipe delivering concrete, with sharp delivering concrete；
S32：Pump concrete is kept to be carried out continuously in formation of pile, the concrete height in ground pump hopper must not be less than 40cm,
Prevent inspiration air from causing plugging；
S33：After the completion of pile, remaining concrete in drilling rod and hose is removed in time；
S34：Behind long-spiral drilling machine end hole, quick connection flexible pipe and ground pump, and in first pump concrete, be first pumped into a small amount of
Cement mortar moistens pipeline；
S35：When promotion drilling rod connecting is near the ground, slows down and put forward pipe speed and clear up aperture dregs in time, to ensure pile crown concrete
Quality.
6. novel long screw auger pore pressure according to claim 3 fills the construction technology of support pile, which is characterized in that the step
Suddenly main reinforcement overlap joint uses single-selded lap joint, weld length 10d in the manufacturing process of steel reinforcement cage in (4), and ensures that main reinforcement is concentric
Degree；Using weldering of working to the last minute, remaining is welded the spiral bar upper and lower ends 3m ranges using interval.
7. novel long screw auger pore pressure according to claim 3 fills the construction technology of support pile, which is characterized in that the step
Suddenly the lower mouth of steel reinforcement cage is to close up in (5), closing in height 0.5m, and is welded with annular at closing in and puts more energy into muscle.
8. novel long screw auger pore pressure according to claim 3 fills the construction technology of support pile, which is characterized in that the step
In rapid S25 when drilling machine is crept into design hole depth, it can stop to bore after answering original place to dally 5 seconds.
9. novel long screw auger pore pressure according to claim 7 fills the construction technology of support pile, which is characterized in that the step
Suddenly the main reinforcement and annular of the steel reinforcement cage in the step S51 in (5) put more energy into muscle using single-selded lap joint；In the step S52
Slump when concrete perfusion should be controlled in 180~220mm；The perpendicularity deviation of the bored concrete pile must not exceed
It is 1% long；Drilling rod when concrete perfusion, which promotes speed, to match with rate of pumping, and perfusion promotes speed control in 2.5m/
Within min, to being perfused the stake finished, before non-pressing reinforcing cage, stake position will be protected；Insertion speed is suitable in the step S53
Control is in 1.2~1.5m/min.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109208586A (en) * | 2018-10-19 | 2019-01-15 | 中国黄金集团建设有限公司 | A kind of slope protection pile construction method |
| CN111206575A (en) * | 2020-01-14 | 2020-05-29 | 海达建设集团有限公司 | Construction method of long spiral pressure-grouting pile |
| CN113914779A (en) * | 2021-11-11 | 2022-01-11 | 长安大学 | Micro pile hole-forming pile-forming integrated drill bit device and method for soil stratum |
| CN114293979A (en) * | 2021-12-09 | 2022-04-08 | 中交第四公路工程局有限公司 | Long spiral drilling and pressure grouting pile elevation measuring device and method |
| CN115182335A (en) * | 2022-08-01 | 2022-10-14 | 中铁一局集团厦门建设工程有限公司 | Construction method of long spiral drilled pile |
| CN115369859A (en) * | 2022-09-29 | 2022-11-22 | 中交四公局第三工程有限公司 | Construction method of long spiral bored pile |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105239561A (en) * | 2015-09-01 | 2016-01-13 | 北京建材地质工程公司 | Long spiral mix spray pre-grouting press concrete post-inserted steel reinforcement cage cast-in-place pile construction process |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105239561A (en) * | 2015-09-01 | 2016-01-13 | 北京建材地质工程公司 | Long spiral mix spray pre-grouting press concrete post-inserted steel reinforcement cage cast-in-place pile construction process |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109208586A (en) * | 2018-10-19 | 2019-01-15 | 中国黄金集团建设有限公司 | A kind of slope protection pile construction method |
| CN111206575A (en) * | 2020-01-14 | 2020-05-29 | 海达建设集团有限公司 | Construction method of long spiral pressure-grouting pile |
| CN113914779A (en) * | 2021-11-11 | 2022-01-11 | 长安大学 | Micro pile hole-forming pile-forming integrated drill bit device and method for soil stratum |
| CN114293979A (en) * | 2021-12-09 | 2022-04-08 | 中交第四公路工程局有限公司 | Long spiral drilling and pressure grouting pile elevation measuring device and method |
| CN115182335A (en) * | 2022-08-01 | 2022-10-14 | 中铁一局集团厦门建设工程有限公司 | Construction method of long spiral drilled pile |
| CN115369859A (en) * | 2022-09-29 | 2022-11-22 | 中交四公局第三工程有限公司 | Construction method of long spiral bored pile |
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