CN108104115A - Cast-in-place pile construction method - Google Patents
Cast-in-place pile construction method Download PDFInfo
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- CN108104115A CN108104115A CN201711427178.4A CN201711427178A CN108104115A CN 108104115 A CN108104115 A CN 108104115A CN 201711427178 A CN201711427178 A CN 201711427178A CN 108104115 A CN108104115 A CN 108104115A
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- China
- Prior art keywords
- cast
- steel reinforcement
- reinforcement cage
- construction method
- concrete
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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
- 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
Abstract
The present invention provides a kind of cast-in-place pile construction method, which includes：Construction site is crept by full screw earth auger；Clear bottom is carried out after drilling to predetermined depth；Promoted drilling rod, while by concrete pump via drilling rod inner cavity through drill bit discharge port, to bottom hole guncreting；It proposes drilling rod, is put into steel reinforcement cage.The cast-in-place pile construction method mud-less pollution, speed of application is fast, construction efficiency is high, cost is relatively low.
Description
Technical field
The invention belongs to building field, more particularly, to a kind of cast-in-place pile construction method.
Background technology
Existing bored concrete pile has vibrator pipe sinking cast-in-place pile, slurry drilled pile.
Construction Process of Vibro-Tube Sinking is：1. Vibration on Start-up is hammered into shape, pile pipe is sink to projected depth；2. in pile pipe
Steel reinforcement cage is transferred to designed elevation；3. concrete material is launched into pile pipe；4. tube drawing pile.
The drawback is that when foundation soil contains thicker layer of sand, vibration sinking tube can not pass through layer of sand；And vibration hammer power
Larger, and at the top of the pile pipe, there is larger noise in when construction, and there are larger difficulties for construction in urban district；In addition vibration sinking tube
Bored concrete pile is also easy to produce necking.
Slurry drilled pile construction technology is：1. rotary drilling rig (or direct and reverse circulation drilling machine) by holing with slurry wall protection extremely
Projected depth；2. transfer steel reinforcement cage in the stake holes of mud off；3. underwater concrete pouring conduit is transferred to certain depth；4. perfusion
Underwater Concrete.
The drawback is that due to using mud off, mud emission amount is big, easily causes construction site mud contamination；In addition construct
Efficiency is low, and operating expenses is high.
It is therefore desirable to research and develop, a kind of mud-less pollution, speed of application are fast, construction efficiency is high, lower-cost bored concrete pile is applied
Work method.
The content of the invention
The object of the present invention is to provide a kind of cast-in-place pile construction method, the cast-in-place pile construction method mud-less pollution, constructions
Speed is fast, construction efficiency is high, cost is relatively low.
To achieve these goals, the present invention provides a kind of cast-in-place pile construction method, which includes：It is logical
Full screw earth auger is crossed to creep into construction site；
Clear bottom is carried out after drilling to predetermined depth；
Promoted drilling rod, while by concrete pump via drilling rod inner cavity through drill bit discharge port, to bottom hole guncreting；
It proposes drilling rod, is put into steel reinforcement cage.
Preferably, promote drilling rod, at the same by concrete pump via drilling rod inner cavity through drill bit discharge port, fill mixed to bottom hole pressure
Solidifying soil includes：It is 180mm-220mm concrete that concrete transfer pump records the slump got ready by pump line, drilling tool to hole internal pressure, is used
Soil in hole is displaced rear tripping in steel reinforcement cage and forms pile foundation by concrete.
Preferably, the slump of guncreting is 18cm-22cm.
Preferably, after every guncreting 40m3-50m3 coupon processed, coupon mark is stayed to be carried out after supporting 28 days to coupon
Mechanics detects.
Preferably, the fullness coefficient of guncreting is more than 1.10.
Preferably, strainer is provided on the hopper of concrete pump, concrete is filled via pressure after strainer filtering to bottom hole.
Preferably, the cement of concrete and matching somebody with somebody for mortar are combined into 1:2.
Preferably, making steel reinforcement cage is further included, including：
Weld main reinforcement；
Spot welding is put more energy into muscle, binding ring muscle, while makes steel reinforcement cage lower end into sharp formula；
One group of cushion block and/or reinforcing bar correcting are set on steel reinforcement cage vertical direction per 5m.
Preferably, the steel reinforcement cage that is put into includes：Steel reinforcement cage is sling, is directed at the center of construction stake, starts vibrator, is hung down
Steel reinforcement cage, after under steel reinforcement cage to design position, is fixed on aperture by straight decentralization steel reinforcement cage by being intubated.
Preferably, it is additionally included in after pile body reaches intensity, pile crown is rejected, while remaining dregs in cleaning room.
The beneficial effects of the present invention are：By the cast-in-place pile construction method of the present invention, long auger pump pressure in pipe mixes
Solidifying soil bored concrete pile using high pressure concrete dado, complete simultaneously with concrete perfusion by pore-forming, inserts steel reinforcement cage afterwards, and concrete continuous is good,
Drilling can enter strong-weathered rock, and stake bottom is without sediment, and construction is shockproof, and low noise, pile-forming speed is fast, and bearing capacity of single pile is high.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Exemplary embodiment of the invention is described in more detail in conjunction with the accompanying drawings, it is of the invention above-mentioned and its
Its purpose, feature and advantage will be apparent, wherein, in exemplary embodiment of the invention, identical reference number
Typically represent same parts.
Fig. 1 shows the flow chart of cast-in-place pile construction method according to an embodiment of the invention.
Specific embodiment
The preferred embodiment of the present invention is described in more detail below.Although the following describe being preferably implemented for the present invention
Mode, however, it is to be appreciated that may be realized in various forms the present invention without should be limited by embodiments set forth herein.Phase
Instead, these embodiments are provided so that the present invention is more thorough and complete, and can be by the scope of the present invention intactly
It is communicated to those skilled in the art.
The invention discloses a kind of cast-in-place pile construction method, which includes：
Various embodiments of the present invention are described above, above description is exemplary, not poor
Construction site is crept by full screw earth auger；
Clear bottom is carried out after drilling to predetermined depth；
Promoted drilling rod, while by concrete pump via drilling rod inner cavity through drill bit discharge port, to bottom hole guncreting；
It proposes drilling rod, is put into steel reinforcement cage.
Specifically, long auger pump pressure in pipe cast-in-place concrete pile uses high pressure concrete dado, pore-forming and concrete perfusion
It completes simultaneously, inserts steel reinforcement cage afterwards, concrete continuous is good, and drilling can enter strong-weathered rock, and without sediment, construction is shockproof, makes an uproar at stake bottom
Sound is low, and pile-forming speed is fast, and bearing capacity of single pile is high.
It is highly preferred that being put into steel reinforcement cage includes transferring square bar cage by being oriented to fixed frame.
Wherein, it is cuboid to be oriented to fixed frame, is oriented to the internal diameter of fixed frame and is engaged with the outer diameter of steel reinforcement cage, fixed guide
Determine frame bottom and be provided with locating pin, be oriented on the inside of fixed frame and be provided with slideway, top is provided with level meter, when decentralization steel reinforcement cage
When, steel reinforcement cage is arranged on and is oriented to inside fixed frame, guiding fixed frame is slidedly arranged on by slideway, locating pin is inserted into underground to leading
It is fixed to fixed frame, observes level meter level condition, adjustment is oriented to the levelness of fixed frame, then transfers steel reinforcement cage.
It is highly preferred that bundling cement during decentralization steel reinforcement cage in advance on steel reinforcement cage mends slurry pipe, further included after transferring steel reinforcement cage
Rubble is poured into stake holes；Cement mends slurry pipe and mends slurry again, and the impurity of stake bottom and pile body is discharged pile body.
Preferably, promoted drilling rod, while by concrete pump via drilling rod inner cavity through drill bit discharge port, to bottom hole
Guncreting includes：Concrete transfer pump is recorded the slump got ready to hole internal pressure and is mixed for 180mm-220mm by pump line, drilling tool
Soil in hole is displaced rear tripping in steel reinforcement cage with concrete and forms pile foundation by solidifying soil.
Preferably, the slump of guncreting is 18cm-22cm.
Preferably, per guncreting 40m3-50m3 after stay coupon processed, coupon mark support 28 days after to examination
Sample block carries out mechanics detection.
Preferably, the fullness coefficient of guncreting is more than 1.10.
Preferably, strainer is provided on the hopper of concrete pump, concrete is filled via pressure after strainer filtering to hole
Bottom.
Preferably, the cement of concrete and matching somebody with somebody for mortar are combined into 1:2.
Preferably, making steel reinforcement cage is further included, including：
Weld main reinforcement；
Spot welding is put more energy into muscle, binding ring muscle, while makes steel reinforcement cage lower end into sharp formula；
One group of cushion block and/or reinforcing bar correcting are set on steel reinforcement cage vertical direction per 5m.
Preferably, the steel reinforcement cage that is put into includes：Steel reinforcement cage is sling, is directed at the center of construction stake, starting is shaken
Dynamic device, vertically transfers steel reinforcement cage, and after under steel reinforcement cage to design position, steel reinforcement cage is fixed on aperture by being intubated.
Preferably, it is additionally included in after pile body reaches intensity, pile crown is rejected, while remaining slag in cleaning room
Soil.
Embodiment
By taking Beijing piping lane implements engineering as an example, construction method is belonged to using the bright method for opening construction, 8-10 meters of groove depth
In dangerous larger part-to-item project, it is necessary to stringent selection pattern foundation pit supporting structure mode.
Engineering, hydrogeologic condition：
This engineering is located in Tongzhou District, and construction site engineering geological condition is simpler, sedimentation age, genetic type division
For artificial accumulation horizon, recent deposit layer and Quaternary deposit layer three categories, and according to formation lithology and its physico-mechanical properties with
Engineering characteristic is divided into 5 big layer and its sub-layer, is now described below：
I artificial accumulation horizon (the 1st big layer)
The plain fill for the artificial accumulation that proposed place surface layer distribution general thickness is 0.40~1.70m 1. layer, room dregs 1. 1
Layer and rubble banket 1. 2 layers (predominantly cement pavement and Roadbed Soil, thickness about 0.40~0.70m), and local 112#~
115#, 131#~134#, 152#, 157#, 160# drilling nearby have the hole of banketing that depth is 2.00~3.80m.
II recent deposit layer (the 2nd big layer)
It is the silt 2. layer of recent deposit under artificial accumulation horizon, silty clay 2. 1 layer and 2. 2 layers of clay.
III Quaternary deposit layer (the 3rd~5 big layer)
It is the silt 3. layer of Quaternary deposit under recent deposit layer, 3. 1 layer and fine sand, flour sand be 3. for organic matter silty clay
2 layers and 3. 3 layers of organic matter clay；Fine sand 4. layer, silty clay 4. 1 layer and 4. 2 layers of silt；Silty clay 5. layer, fine sand 5. 1
Layer, silt 5. 2 layers and 5. 3 layers of organic matter clay.
Hydrogeological aspect, nearly 3-5 superlatively to descend water level elevation (stagnant without upper strata for 16.10~15.10m or so
Water continuously decreases from West to East).
Barrier
Place physical features is flat open, and on-site is largely for the forest land left uncultivated, the village removed, local fragmentary distribution
There is the grave hole that several places discard.Place periphery is without other important buildings or structures.
In the range of the construction infection of foundation pit periphery pipeline is built without present situation.
Method for protecting support selects
According to actual geology, the hydrology and correlated condition, steel reinforcement cage perfusion is inserted after selecting long auger guncreting
Stake.
The reason for selecting the technology has：One's respective area geological conditions is relatively simple, and level of ground water is relatively low, meets applying for the technology
Work requirement, meanwhile, which has the advantages that speed of application is fast, pile quality is high, environmental pollution is small, noiseless.
Operational procedure and construction process：
Long screw auger drilling deposited pile is according to Design of Foundation requirement and geological condition, using in long-spiral drilling machine pore-forming, pipe
It is pumped concrete pile-formation process (i.e. llong helix bored piles).The technique is after getting into projected depth with long-spiral drilling machine, is being lifted
While drilling tool, it is 180mm-220mm coagulations to record the slump got ready to hole internal pressure by pump line, drilling tool with concrete transfer pump
Soil in hole is displaced rear tripping in steel reinforcement cage with concrete and forms pile foundation by soil.
Fig. 1 shows the flow chart of cast-in-place pile construction method according to an embodiment of the invention.
It is carried out as steps described below as shown in Figure 1, inserting steel reinforcement cage filling pile construction after long auger guncreting：
(1) after drilling machine is in place, straightening pile frame conduit using total powerstation align piles position, is read to bore the zero point of deep scaleplate；
(2) creep into；
(3) stop drilling, read drilling depth；
(4) it is empty after drilling to completion to bore clear bottom；
(5) guncreting is pressed to bottom hole through drill bit discharge port from drilling rod inner cavity with concrete pump when promoting drilling rod and filled
There is no the positions of collapse hole danger to slightly above stake top absolute altitude for concrete；
(6) propose drilling rod, be put into steel reinforcement cage.
Long auger Pumping concrete construction process figure is as shown in Figure 1：
Long screw auger drilling deposited pile work progress management：
(1) preparation of construction and surveying setting-out.Before equipment is marched into the arena, by site operation requirement, good material storage space is arranged, is connect
Water flowing electricity, fixes interim transport routes, construction site is made to possess requirements for starting construction.In addition, the survey provided by Party A or design department
Measure control point and plan view unwrapping wire.Put stake position can construct after Party A, management department recheck and sign.
(2) equipment is installed, and drilling machine is in place.Equipment is assembled, and the equipment such as drilling machine, delivery pump carry out trial operation, it is ensured that set
It is standby normal.After reinspection, drill bit of drilling machine center align piles position center, pile position deviation is less than 20mm for stake position.Before drilling is spudded in, check
Drill bit verticality and level.After drilling machine is steady, it is ensured that pile verticality is less than 1%.
(3) drilling and forming hole.Before drilling, drill bit valve is closed, enters to prevent boring mud during drilling and drill bit is blocked in drill bit
When passage creeps into soft-hard interlayer, drilling speed is controlled, ensures that drilling tool is vertical, firm.During drilling, drilling situation is observed at any time,
Stop to bore in time after reaching design requirement depth, start delivery pump, concrete is made to be sprayed from drill bit bottom, by the pressure of concrete
Power slowly lifts drilling rod, until going out ground.Suitable one-step pore-creating in drilling process prevents drill bit valve from blocking.In addition, it needs tight
Lattice control depth of pore forming, ensure designing pile length.
(4) the technology requirement of concrete.Concrete will have good pumpability, and the slump is controlled in 18cm- 22cm, and slump is spent
Little Yi pluggings influence pumping efficiency, excessive, and plugging equally easily occurs for easy isolation bleeding, therefore to inspect periodically the slump, every
Class no less than 2 times.Test block is to check the important evidence of pile strength, censorship after staying one group of test block, mark 28 days foster per 50m3.Concrete
Fullness coefficient cannot be less than 1.10.
(5) concrete pumping.Certain cement mortar should be stirred before construction first and carries out pumping lubrication pipeline, cement mortar
Match ratio use 1:2.Pumping during construction should match with pipe-pulling speed during long spire pile, and requirement is continuous during pile,
It avoids shutting down and waits to expect.Strainer on the hopper of concrete pump should be housed, avoid bulk stone into pipeline is caused to block, when construction protects always
Holding in concrete stock bucket has enough concrete, in case sucking air causes plugging.When occurring conveying blockage, counter should be pumped
Operating makes concrete return to hopper；Blocking cannot be still eliminated several times when instead pumping, should be unloaded in pump machine, torn pipe open and excluded to block up
Plug.
(6) making of steel reinforcement cage.Before reinforcing bar is made, to raw material and it can first be connect with supervisor by code requirement
Head inspection by sampling, grants screwing steel bars cage after the assay was approved；Steel reinforcement cage is made by design drawing and code requirement, to steel before making
Muscle carries out straightening processing；Sharp formula is made in new process requirement steel reinforcement cage lower part, and main reinforcement is welded together.Main reinforcement and stirrup of putting more energy into
Using spot welding, ring muscle is with main reinforcement using binding；Steel reinforcement cage is used per mono- group of cushion block of 5m or the method for reinforcing bar correcting, to ensure main reinforcement
The thickness of protective layer reaches 50mm；The steel reinforcement cage to complete after quality inspection personnel self-test qualification, submits a report asking for supervisor in time
Member checks and accepts, and grants after qualified and uses.
(7) decentralization installation steel reinforcement cage.Steel reinforcement cage uses and disposably hangs technique.Ensure cage uniform force, prevent from deforming.Steel
Vertical and stress balance should be kept after the lifting of muscle cage, is inserted into steel reinforcement cage.Vertical vibrator is penetrated in cage, starts small hoist engine,
Steel reinforcement cage is sling, is directed at the center of construction stake, vertically transfers steel reinforcement cage, starts vibrator, lower cage, which is hampered, should stop transferring, and look into
Bright reason, timely processing are forbidden raised pelter, are transferred by force.After steel reinforcement cage is in place, tripping in position is examined by design requirement
It looks into, to after design position under confirmation, steel reinforcement cage is fixed on aperture using intubation.
(8) Stake head handling.It, can be to pile crown into pedestrian by general contract unit after pile body reaches some strength when pile driving construction is complete
Work is rejected, and remaining dregs should use manual cleaning in field, forbids to use mechanical chipping, with anti-collision broken pile body.
Construction quality inspection and the acceptance of work
Formation of pile quality examination
(1) three master operation processes such as pore-forming, ready-mixed concrete and perfusion should be checked, checked in work progress
It carries out " tri-inspection system ".
(2) construction terminates, and to after defined curing period, is excavated by estimated absolute altitude, according to design requirement to pile quality into
Row detection, and checked and accepted jointly by designing unit, quality supervised department and unit in charge of construction.
(3) design alteration notice, accident treatment record.
(4) construction completion report of construction work.
Quality control standards (QCS)
(1) construction quality standard is as shown in table 1.
Table 1：Construction quality standard
(2) fabrication of reinforcing cage standard is as shown in table 2.
Table 2：Fabrication of reinforcing cage standard
(3) material used in must have quality certificate and qualification test report.
(4) perfusion side's amount should be greater than design volume, fullness coefficient:
1.0≤S≤1.5
(5) pile concrete is continuous whole, and no broken pile, undergauge, folder mud, perfusion concrete density is good, and pile crown concrete is without loose phenomenon.
(6) stake position tolerance.
Stake holes diameter is not less than design stake footpath, vertical degree of the peg hole deviation≤1/100；Aperture and the test quantity point of verticality
Not Bu Shaoyu total amount of pile 10% and 5%；
Benefit brief analysis
Technical benefits
The technique can be used in the stratum such as general clay, collapsible loess, muck soil, medium-fine sand, sandy gravel, also can use
In the drifting sand layer pile foundation foundation construction for having underground water, solve undergauge, broken pile that other pile modes occur in engineering construction,
Empty stake problem.Steel reinforcement cage bored concrete pile is inserted after long auger guncreting has that high capacity, load inversion amplitude be big, sedimentation
Deform the features such as small, settlement stability is very fast.
Economic benefit
Due to the bearing power increase of single pile, the quantity of stake can be reduced, and can thus reduce reinforcing bar and amount of concrete, together
When due to the technology pile-forming speed it is very fast, certain duration benefit can be brought.
Environmental protection, social benefit
The shockproof, low noise of long screw auger drilling deposited pile construction, no mud are arranged outside, reduce environmental pollution；Speed of application
Soon, an equipment can construct 10-30 piles daily, accelerate the progress of construction, and society, environmental benefit are apparent.Especially this work
Journey is located at Tongzhou District, Beijing Cultural Tourist Area plate, to having strict requirements in terms of green construction, is filled using long auger
Note pile driving construction can meet the needs of environmental protection.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.In the case of without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes will be apparent from for the those of ordinary skill in art field.
Claims (10)
1. a kind of cast-in-place pile construction method, which is characterized in that the cast-in-place pile construction method includes：
Construction site is crept by full screw earth auger；
Clear bottom is carried out after drilling to predetermined depth；
Promoted drilling rod, while by concrete pump via drilling rod inner cavity through drill bit discharge port, to bottom hole guncreting；
It proposes drilling rod, is put into steel reinforcement cage.
2. cast-in-place pile construction method according to claim 1, which is characterized in that promote drilling rod, while pass through concrete pump
Via drilling rod inner cavity through drill bit discharge port, include to bottom hole guncreting：Concrete transfer pump is filled by pump line, drilling tool to hole internal pressure
The slump prepared is 180mm-220mm concrete, and soil in hole is displaced rear tripping in steel reinforcement cage with concrete forms pile foundation
Plinth.
3. cast-in-place pile construction method according to claim 1, which is characterized in that the slump of guncreting is 18cm-
22cm。
4. cast-in-place pile construction method according to claim 1, which is characterized in that per guncreting 40m3-50m3After stay system
Coupon, coupon mark carry out mechanics detection after supporting 28 days to coupon.
5. cast-in-place pile construction method according to claim 1, which is characterized in that the fullness coefficient of guncreting is more than
1.10。
6. cast-in-place pile construction method according to claim 1, which is characterized in that filter is provided on the hopper of concrete pump
Net, concrete are filled via pressure after strainer filtering to bottom hole.
7. cast-in-place pile construction method according to claim 1, which is characterized in that the cement of concrete and matching somebody with somebody for mortar are combined into
1:2。
8. cast-in-place pile construction method according to claim 1, which is characterized in that making steel reinforcement cage is further included, including：
Weld main reinforcement；
Spot welding is put more energy into muscle, binding ring muscle, while makes steel reinforcement cage lower end into sharp formula；
One group of cushion block and/or reinforcing bar correcting are set on steel reinforcement cage vertical direction per 5m.
9. cast-in-place pile construction method according to claim 1, which is characterized in that the steel reinforcement cage that is put into includes：Sling steel
Muscle cage is directed at the center of construction stake, starts vibrator, vertically transfers steel reinforcement cage, after under steel reinforcement cage to design position, pass through
Steel reinforcement cage is fixed on aperture by intubation.
10. cast-in-place pile construction method according to claim 1, which is characterized in that it is additionally included in after pile body reaches intensity, it is right
Pile crown is rejected, while remaining dregs in cleaning room.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711427178.4A CN108104115A (en) | 2017-12-26 | 2017-12-26 | Cast-in-place pile construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711427178.4A CN108104115A (en) | 2017-12-26 | 2017-12-26 | Cast-in-place pile construction method |
Publications (1)
| Publication Number | Publication Date |
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| CN108104115A true CN108104115A (en) | 2018-06-01 |
Family
ID=62213070
Family Applications (1)
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| CN201711427178.4A Pending CN108104115A (en) | 2017-12-26 | 2017-12-26 | Cast-in-place pile construction method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915043A (en) * | 2019-03-19 | 2019-06-21 | 安徽联开建设工程有限责任公司 | A kind of construction method of spiral Squeezing Soil Pile hole drill tool and bored concrete pile |
| CN110644475A (en) * | 2019-09-25 | 2020-01-03 | 瑞森新建筑有限公司 | Method for filling pile by inserting steel bars after long spiral drilling and concrete pressure pouring |
| CN112411545A (en) * | 2020-11-26 | 2021-02-26 | 西南石油大学 | Continuous drilling and circulating pouring integrated piling technology construction method for hard formation |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106677168A (en) * | 2017-01-17 | 2017-05-17 | 浙江勤业建工集团有限公司 | Construction method of cast-in-place superfluid concrete pile |
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2017
- 2017-12-26 CN CN201711427178.4A patent/CN108104115A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106677168A (en) * | 2017-01-17 | 2017-05-17 | 浙江勤业建工集团有限公司 | Construction method of cast-in-place superfluid concrete pile |
Non-Patent Citations (2)
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| 孟俊娜: "《建设工程经济》", 31 July 2014 * |
| 李丽民: "《土力学与基础工程》", 31 March 2016 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915043A (en) * | 2019-03-19 | 2019-06-21 | 安徽联开建设工程有限责任公司 | A kind of construction method of spiral Squeezing Soil Pile hole drill tool and bored concrete pile |
| CN110644475A (en) * | 2019-09-25 | 2020-01-03 | 瑞森新建筑有限公司 | Method for filling pile by inserting steel bars after long spiral drilling and concrete pressure pouring |
| CN112411545A (en) * | 2020-11-26 | 2021-02-26 | 西南石油大学 | Continuous drilling and circulating pouring integrated piling technology construction method for hard formation |
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Application publication date: 20180601 |
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