CN103821141A - Thread pile construction process - Google Patents
Thread pile construction process Download PDFInfo
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- CN103821141A CN103821141A CN201410080247.9A CN201410080247A CN103821141A CN 103821141 A CN103821141 A CN 103821141A CN 201410080247 A CN201410080247 A CN 201410080247A CN 103821141 A CN103821141 A CN 103821141A
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Abstract
The invention discloses a thread pile construction process which is used for solving the problem that piles collapse easily in the prior art. The thread pile construction process comprises the following steps: positioning a ram machine, and performing two-way control on the verticality by aligning with a pile core; aligning with a pile position during drilling, and controlling the axial movement speed and rotation speed of a drill rod by virtue of the ram machine in the pile hole thread section drilling process; controlling the drill rod to reversely rotate and ascend along the thread track of a soil body by virtue of the ram machine when pile hole rear lift drilling is finished; adopting a synchronization technology, namely synchronizing the ascending speed and the reverse rotation speed, so as to form a thread concrete pile body; placing a reinforcement cage into a pile body concrete by use of a rear placement mode, so as to form a thread pile. The technical scheme has the advantages that a screw rod is directly utilized as a breast wall during pore forming, so that the risk that piles formed by common machines collapse is avoided, and quality defects such as slag inclusion, necking and pile breaking in a concrete pouring process are effectively avoided; the reinforcement cage of the thread pile can be used for avoiding contact between reinforcement and mud, so that the reinforcement can be fully hold and wrapped by concretes, and the service life of the pile is prolonged.
Description
Technical field
The present invention relates to the foundation construction technology in a kind of building field.
Background technology
Helical burr ram is the structure form that has adopted variable cross-section, and the pore forming process Lateral soil body is squeezed, encryption effect, and the pile rear section soil body forms screw thread, and the stake side soil body forms nut, pile body screw thread and the tight interlock of stake side soil nut.Then promote drilling rod completely, carry out filling concrete after reinforcing cage is put into a hole.
Helical burr ram is constructed compared with driving into type preformed pile, and construction noise is low, and friction, on the stake nothing impact of having constructed; With full auger, the castinplace pile of conventional mud retaining wall pore-forming is compared, mud-less pollution and spoir problem.Helical burr ram is a kind of Novel pile with very high practical value.
In the prior art, the helical burr ram construction technology part that also comes with some shortcomings: due to drilling rod after completing in boring need promote after fluid concrete again, in the process promoting at drilling rod, can produce the unsupported situation of stake hole wall, easily there is pile and cave in.For promoting the application of helical burr ram construction technology, improve efficiency of construction, guarantee construction quality, avoid construction accident, the system research of strengthened thread pile construction technology is imperative.
Summary of the invention
The invention is intended to provide a kind of helical burr ram construction technology, to solve the problem that in prior art, easily generation pile caves in.
Patent scheme: the helical burr ram construction technology in this programme, is characterized in that comprising the steps:
A) pile-forming machine perching, the two-way control verticality of align piles core;
B) align piles position while boring under, in the thread segment drilling process of stake hole, a stake machine control drilling rod moves axially speed and rotary speed, often rotates a circle, and drilling rod moves axially a pitch, and extrusion soil forms thread segment until projected depth;
C) complete behind a hole and carry while boring, stake machine control drilling rod promotes along the curved-line thread path reverse rotation of the soil body, adopting simultaneous techniques is that hoisting velocity is synchronizeed with reverse rotation speed, in carrying brill, pump machine utilizes drilling rod tube core high to stake hole thread segment top mark for passage pumps into concrete, forms screw thread concrete pile body;
D) adopt rearmounted mode that reinforcing cage is inserted in pile concrete, form helical burr ram.
In above-mentioned technique, described simultaneous techniques is that in the unit interval, the axial displacement of drilling rod equals the axial displacement after screw thread rotation; Asynchronous technology is that in the unit interval, the axial displacement of drilling rod is not equal to the axial displacement after screw thread rotation.Employing simultaneous techniques can form screw thread while creeping into and drilling rod synchronous coordination advances, and can on stake hole wall, form the screw thread consistent with drill rod thread; And while adopting asynchronous technology, screw thread does not mate with advancing of drilling rod, the thread segment at drilling rod rear portion is at the middle screw thread can progressive failure drilling rod front threads section forming that advances, and the final stake hole forming is non-threaded cylindrical.Forward mentioned above is that earth's surface is downward.
In step b, form the screwed stake of entirety hole.
In step c, drilling rod promotes not destroy a mode for hole screw thread, carry out concrete perfusion simultaneously, drilling rod has the effect of retaining wall in this process, the final shape of threads pile body section that forms helical burr ram, as need make pile body all with thread, need all to adopt simultaneous techniques in the lifting process of drilling rod, to avoid the destruction of drilling rod to soil body thread segment.。
Finally reinforcing cage is sunk to not solidified concrete in steps d, form complete helical burr ram.
The advantage of technique scheme is: the retaining wall while directly utilizing screw rod as pore-forming, the risk of avoiding common mechanical pile to cave in, effectively avoids the mass defects such as slag inclusion in concreting process, necking down, broken pile.
The reinforcing cage of helical burr ram adopts rearmounted mode to pacify into a heart concrete, avoided contacting of reinforcing bar and mud, and reinforcing bar can fully be bonded by concrete, improved the service life of stake.
Screw pile core concrete is by drilling rod center from the bottom of the direct pumping pressure pile of drill bit valve, and stake end, without loosened soil, is avoided the sordid mass defect in the clear end of common mechanical pile.
Further, carry out before a hole thread segment creeps in step b, drilling rod creeps into downwards with asynchronous technology until reach a hole thread segment, and then completes a hole thread segment with simultaneous techniques and creep into.
When boring, can adopt two step operations, during to stake hole upper operating, stake hole wall is the non-threaded face of cylinder, a bottom operation stake hole wall is threaded stake hole, and after step completes, forming top and be cylindrical, bottom is threaded stake hole, to meet the in particular cases needs of construction.
Further, in step c, forming after screw thread concrete pile body, drilling rod continues to be rotated in the forward or directly promotes and produce cylinder soil body space, forms non-threaded concrete pile body.
Helical burr ram is all or part of cast-in-place concrete pile with thread of pile body that adopts specific equipment and hole forming method to form, and as need make pile body part with thread, needs in the lifting process of drilling rod in conjunction with adopting simultaneous techniques and asynchronous technology.
In step c, no matter drilling rod is to be rotated in the forward or directly to promote, and can play the effect that forms cylindrical stake hole, by concrete perfusion, finally forms the first half of helical burr ram, i.e. the cylindric pile body section in top.
Further, in steps d, by vibrating arm, reinforcing cage is headed into concrete, then in making vibrating arm vibration work, promote vibrating arm.
The feature of technique scheme is: because stake footpath is little, brill is carried on concreting limit, limit, and then adds reinforcing cage to vibrate, and avoids common mechanical pile uncompacted mass defect of vibrating, and pile quality is reliable.
Further, in step c, when drilling rod uses asynchronous technical work, form non-threaded pile body; While using simultaneous techniques work, form screw thread pile body.When drilling rod uses asynchronous technical work, drilling rod revolves and turns around, and more than two pitch that can simultaneously decline can make the face of cylinder in the stake hole producing more smooth.Helical burr ram is all or part of cast-in-place concrete pile with thread.
Accompanying drawing explanation
Fig. 1 is the process chart of the embodiment of the present invention.
The specific embodiment
As shown in Figure 1, specifically, this enforcement comprises following content to the technical process of the embodiment of the present invention.
One, rig is in place
Screw thread rig is reached to construction location, determine the leaning forward or hypsokinesis of luffing position, chassis of rig according to pressurization needs, hole depth, mix up mast and vertically guarantee that unit head center, drilling rod center, drill center are on same vertical curve.Slewing drilling machine back and forth, checks work progress presence of interference, and whether lifting reinforcing cage is convenient.According to the accident that may run in geology judgement construction, whether if there is accident, it is convenient to process.Take into full account the problems such as construction validity, easy construction, accident treatment feasibility.
Two, drilling and forming hole
1, screw-thread pile machine must straightening after in place, leveling firm, guarantee into hole perpendicularity.Pile position deviation is less than 50mm, can become 90 jiaos to carry out two-way control verticality with two transits, and verticality allowable variation is not more than 1%, aligns and must carry out stake position before boring under stake position and check at rig, guarantees a degree of accuracy for the verticality of pile foundation and stake.
2, after confirming that stake position is errorless, start a stake machine, when boring starts, close drill bit valve, in boring procedure, adopt after first slow soon, its objective is that reducing drilling rod rocks.The asynchronous technology of drilling rod forward is crept into until drill bit arrives the thread segment projected depth in stake hole, and drilling rod revolves and turns around, and declines and exceedes more than one pitch simultaneously; Then lower brill remains a constant speed in going down process, stake machine robot control system(RCS) strictly controls drilling rod decrease speed and rotary speed meets simultaneous techniques requirement, make the two coupling, requiring drilling rod to revolve turns around, a pitch declines simultaneously, in the soil body, form screw thread, stop boring when being drilled into after predetermined stake end projected depth, stake hole forms.Construction is in the time of thread segment, and rig running speed, carrying drilling speed degree should be synchronous with rotary speed respectively, guarantees the integrality of screw thread.
Three, helical burr ram filling concrete
1, after pore-forming, concrete mix be transported in hollow drill by high-voltage tube and be pressed onto drill bit with concrete pump machine, opening drill bit valve, being pumped by drill bit, continuing pumping of concrete.Now, the reverse rotation of stake machine promotes threaded drillpipe, putting forward brill process king-pile machine robot control system(RCS) strictly controls drilling rod hoisting velocity and rotary speed and keeps synchronous and coupling, require a pitch of screw rod drilling rod rotation one circle drilling rod rising, a pitch of drilling rod rising, the continuous packing space of concrete, helical burr ram figure becomes.In the time that drilling rod is mentioned the design height of thread segment end face, screw rod drilling rod positive rotation or directly promote the band cylindrical space that (cleaning screw thread) produces again, until design stake top mark is high, forms the helical burr ram of pile body part with thread.
2, carry in brill process and should strictly control drilling rod hoisting velocity and rotary speed, until more than being poured into design of pile top degree of depth 500mm.
3, concrete building must guarantee to carry drilling speed degree and concrete pumping amount matches, and builds by the mode of building of underwater concrete, and fullness coefficient should be greater than 1, guarantees concrete Forming Quality.
4, concrete mix divergence should be greater than 500mm, and the slump should be controlled at 160～220mm, must not emanate or bleeding.
5, the concrete of every helical burr ram is answered continuous placing, and primary concreting completes, in case of exceptional circumstances can not continuous placing, and must redrilling, concreting again.
6, helical burr ram concrete fine aggregate should adopt medium sand, and coarse aggregate adopts continuous grading, and maximum nominal diameter should not be greater than 20mm.
7, every of concrete sample indwelling must be no less than 2 groups.
Four, the processing of pile cages and examination
1, entering on-the-spot reinforcing bar should have product certificate and survey report, should organize detections such as carrying out deviation of weight and mechanical property after entering scene, can march into the arena after qualified.
2,, according to designing requirement, in conjunction with actual pile body length, calculate vertical muscle and stirrup materials length, accurately blanking.
3, the reinforcing cage machining answers subregion to stack, and carries out mark work.Can fast distinguish and effectively use according to condition of construction.
4, put more energy into stirrup and vertical muscle electric welding is firm, and strengthens at suspension centre place.
5, can enter smoothly pile body for ease of reinforcing cage postposition, the bottom of reinforcing cage should be done tapered, and firm welding is answered at taper position, and taper tip occupy reinforcing cage center.
If 6, the vertical muscle of reinforcing cage needs spreading, according to (GB50204-2002) (version in 2011) and designing requirement of existing national regulation " concrete structure engineering construction quality standards of acceptance ", confirm spreading mode, if need be welded to connect, should carry out welding piece, and be up to the standards.
Five, settle reinforcing cage
1, before boring completes, reinforcing cage is transported near a machine, and the vibrating arm that one end connects vibrating device is penetrated to the inner chamber of reinforcing cage, reinforcing cage adopts steel cable flexible to be connected with vibrating arm.And vibrating device adopts bolt-type to be connected with vibrating tube.The taper position of the head of vibrating arm and reinforcing cage pushes against as far as possible.
2, in concreting, promote reinforcing cage, make the conical lower portion of reinforcing cage high a little more than concrete top mark, the reinforcing cage raising up is aligned to a core, then utilize in the concrete that the deadweight of vibrating arm and vibratory equipment built vertical reinforcing cage insertion, until reinforcing cage after projected depth, start vibrating device, limit promotes the vibration of vibrating arm limit, makes inner concrete closely knit.
Six, next stake is shifted, constructs
1, extract after vibrating arm, mobile stake machine, to next position, repeats above step and carries out the construction of next pile
2, in mobile stake machine process, answer choose reasonable path, avoid the destruction to moulding stake and next stake to be onstructed position.
Seven, cutter piling head
All screw pile core concretes reach after some strength, dig out pile crown scum silica frost with pneumatic pick, than the slightly high 20～50mm of design stake top mark height left and right, then use artificial chipping.
Above-described is only embodiments of the invention, and in scheme, the general knowledge such as known concrete structure and characteristic is not done too much description at this.Should be understood that; for a person skilled in the art, not departing under the prerequisite of structure of the present invention, can also make some distortion and improvement; these also should be considered as protection scope of the present invention, and these can not affect effect of the invention process and practical applicability.The protection domain that the application requires should be as the criterion with the content of its claim, the content that the specific embodiment in manual and accompanying drawing can require for power of interpretation profit.
Claims (5)
1. helical burr ram construction technology, is characterized in that comprising the steps:
A) pile-forming machine perching, the two-way control verticality of align piles core;
B) align piles position while boring under, in the thread segment drilling process of stake hole, a stake machine control drilling rod moves axially speed and rotary speed, often rotates a circle, and drilling rod moves axially a pitch, and extrusion soil forms thread segment until projected depth;
C) complete behind a hole and carry while boring, stake machine control drilling rod promotes along the curved-line thread path reverse rotation of the soil body, adopting simultaneous techniques is that hoisting velocity is synchronizeed with reverse rotation speed, in carrying brill, pump machine utilizes drilling rod tube core high to stake hole thread segment top mark for passage pumps into concrete, forms screw thread concrete pile body;
D) adopt rearmounted mode that reinforcing cage is inserted in pile concrete, form helical burr ram.
2. helical burr ram construction technology according to claim 1, is characterized in that: in step b, carry out before a hole thread segment creeps into, drilling rod creeps into downwards with asynchronous technology until reach a hole thread segment, and then completes a hole thread segment with simultaneous techniques and creep into.
3. helical burr ram construction technology according to claim 1, is characterized in that: in step c, forming after screw thread concrete pile body, drilling rod continues to be rotated in the forward or directly promotes and produce cylinder soil body space, forms non-threaded concrete pile body.
4. helical burr ram construction technology according to claim 1, is characterized in that: in steps d, by vibrating arm, reinforcing cage is headed into concrete, then in making vibrating arm vibration work, promote vibrating arm.
5. helical burr ram construction technology according to claim 1, is characterized in that: in step c, when drilling rod uses asynchronous technical work, form non-threaded pile body; While using simultaneous techniques work, form screw thread pile body.
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| CN201410080247.9A CN103821141B (en) | 2014-03-06 | 2014-03-06 | Helical burr ram construction technology |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104947660A (en) * | 2015-07-03 | 2015-09-30 | 陕西桩鑫建设工程有限公司 | Reverse screw spike pile and construction method thereof |
| CN106836194A (en) * | 2017-01-26 | 2017-06-13 | 桐乡市天顺模具有限公司 | Reinforcing self-tapping type cast-in-place pile construction method |
| CN107338793A (en) * | 2017-07-20 | 2017-11-10 | 重庆交通大学 | A kind of cast-in-place screw rod prestress pulling resistant stake and its construction method |
| CN107386272A (en) * | 2017-07-20 | 2017-11-24 | 重庆交通大学 | A kind of cast-in-place screw rod uplift pile and its construction method suitable for soft foundation |
| CN109183790A (en) * | 2018-09-06 | 2019-01-11 | 江苏兴厦建设工程集团有限公司 | A kind of Screw Pile and its construction tool and construction method |
| CN110331698A (en) * | 2019-06-11 | 2019-10-15 | 徐州工程学院 | A kind of system that polyurethane formation curtain was constructed and be rapidly injected to casement |
| CN111691413A (en) * | 2020-06-29 | 2020-09-22 | 中铁二院工程集团有限责任公司 | Anti-upwarp threaded pile structure and design and construction method thereof |
| CN113756290A (en) * | 2021-09-13 | 2021-12-07 | 中电建十一局工程有限公司 | Sand-pebble geological variable-section screw pile construction process |
Families Citing this family (1)
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| CN110130154A (en) * | 2019-05-22 | 2019-08-16 | 中铁八局集团第三工程有限公司 | High-speed railway treatment of soft foundation screw rod pile construction method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104947660A (en) * | 2015-07-03 | 2015-09-30 | 陕西桩鑫建设工程有限公司 | Reverse screw spike pile and construction method thereof |
| CN106836194A (en) * | 2017-01-26 | 2017-06-13 | 桐乡市天顺模具有限公司 | Reinforcing self-tapping type cast-in-place pile construction method |
| CN107338793A (en) * | 2017-07-20 | 2017-11-10 | 重庆交通大学 | A kind of cast-in-place screw rod prestress pulling resistant stake and its construction method |
| CN107386272A (en) * | 2017-07-20 | 2017-11-24 | 重庆交通大学 | A kind of cast-in-place screw rod uplift pile and its construction method suitable for soft foundation |
| CN109183790A (en) * | 2018-09-06 | 2019-01-11 | 江苏兴厦建设工程集团有限公司 | A kind of Screw Pile and its construction tool and construction method |
| CN110331698A (en) * | 2019-06-11 | 2019-10-15 | 徐州工程学院 | A kind of system that polyurethane formation curtain was constructed and be rapidly injected to casement |
| CN111691413A (en) * | 2020-06-29 | 2020-09-22 | 中铁二院工程集团有限责任公司 | Anti-upwarp threaded pile structure and design and construction method thereof |
| CN113756290A (en) * | 2021-09-13 | 2021-12-07 | 中电建十一局工程有限公司 | Sand-pebble geological variable-section screw pile construction process |
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