CN108385669A - A kind of CFG pile driving constructions engineering method - Google Patents
A kind of CFG pile driving constructions engineering method Download PDFInfo
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- CN108385669A CN108385669A CN201810165692.3A CN201810165692A CN108385669A CN 108385669 A CN108385669 A CN 108385669A CN 201810165692 A CN201810165692 A CN 201810165692A CN 108385669 A CN108385669 A CN 108385669A
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- 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
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention belongs to the realm of building construction, and in particular to a kind of CFG pile driving constructions engineering method includes the following steps：The installation of smooth location, surveying setting-out → drilling machine, the delivering concrete → guncreting of debugging → stake position centering → drilling → in Ti Zuan to designed elevation → cleaning inter-pile soil promote drilling rod → pile and check and accept.Present invention solution causes construction quality not up to standard since construction is improper in the prior art, the technical issues of serious and inefficiency is wasted in construction.
Description
Technical field
The invention belongs to the realm of building construction, and in particular to a kind of CFG pile driving constructions engineering method.
Background technology
CFG be cement fly ash gravel pile abbreviation, it is that appropriate aggregate chips, flyash are mixed on the basis of broken stone pile
With a small amount of cement, the pile body with some strength is made after adding water mixing.
It is mostly used concrete at present to replace, is plain concrete pile.CFG are a kind of Low Intensity Concrete Piles, can be fully sharp
It with the bearing capacity of inter-pile soil, collective effect, and can transmit in load to deep foundation base, there is preferable technical performance and economy
Effect.
And in the prior art, it causes construction quality not up to standard since construction is improper, wastes serious in construction and imitate
Rate is low, seriously affects the process and quality of entire engineering.In view of this, the applicant provides a kind of CFG pile driving constructions engineering method, this
Thus case generates.
Invention content
The purpose of the present invention is to provide a kind of CFG pile driving constructions engineering method, with solve in the prior art due to construction not
The technical issues of serious and inefficiency is wasted when causing construction quality not up to standard, in construction.
To achieve the above object, the technical solution that the present invention specifically provides is：A kind of CFG pile driving constructions engineering method, including it is as follows
Step：The installation of smooth location, surveying setting-out → drilling machine, the delivering concrete → pressure of debugging → stake position centering → drilling → in Ti Zuan
Concrete to designed elevation → cleaning inter-pile soil, promotion drilling rod → pile is filled to check and accept.
Further, the surveying setting-out：（1）The control point that owner or planning department provide is confirmed at the construction field (site)；
（1）According to the control point and CFG bit plans provided, stake position axis, anchor point are set with total powerstation or theodolite survey；
（2）Embedded semipermanent control point：Control point is led into metastable position, and pays attention to protection, so as in constructing with
Shi Fuhe；
（3）Measure stake site：According to review it is qualified after each axial line control point carry out stake position setting-out, when specific setting-out, using double
Control method, and ensure the error of centralization≤1cm.The hole that depth is not less than 300mm is penetrated at stake with 8 reinforcing bars of φ, fills lime and is plugged
Bamboo stick, identification pile position.
Further, the drilling machine installation and debugging：Stake machine in place must be smooth and firm, and immersed tube is vertical with ground holding,
Perpendicularity deviation is not more than 1.5%；Stake machine plan-position deviation in place is less than 10 mm；Such as band precast concrete pile top, need to be embedded to
Below ground 300mm.
Further, the drilling：（1）Chassis flatness is adjusted, after true fixed pile is errorless, makes drill rod axis perpendicular alignmnet hole
Position center, hammers that vertical to drilling rod and borer chassis is horizontal corrects into shape using two-wire, drilling rod verticality satisfaction≤1%L requirements；
（2）It can be used every a dozen one modes according to Pile Foundations Design situation to reduce soil compaction effect when construction；
（3）In boring procedure rate of penetration will it is first slow after it is fast, specific rate of penetration according to the size of current value in work progress with
When adjust, it is ensured that current value≤120A in work progress prevents from leading to a diameter because drilling rod shaking amplitude is excessive or amount of deflection is excessive
Deviation is excessive；
（5）Boring procedure should clear up the soil that aperture periphery drills out in time, therebetween as found situations such as drilling rod deflection, stake position are not allowed
It should stop to bore immediately and above carry, reposition, bored again after straightening, until design stake bottom absolute altitude；
（6）After getting into predetermined depth, it is necessary to carry out dallying clear native and then stop operating in original place, carry drilling rod；Pay attention to clear in idle running
It must not deepen to creep into when native；Drilling rod must not be turned round when carrying brill；Bottom hole loosened soil thickness must not exceed 10cm.
Further, the ground pump delivering concrete：（1）The riding position of concrete ground pump will be with the sequence of construction phase of drilling machine
Cooperation, reduces bend to the greatest extent, concrete pump is generally advisable within 60 m at a distance from drilling machine；（2）It is used before concrete pumping
Cement mortar is soaked；（3）The pumping of concrete will be carried out continuously, and when drilling machine shifts, the concrete in ground pump hopper is answered
It continuously stirs, when pumping, the height of hopper inner concrete should be kept, 400 mm must not be less than, plugging is caused to prevent inspiration air.
Further, the guncreting：（1）The indices such as bore diameter, depth are examined through on-site supervision engineer
After qualification, concrete can be perfused.Answer first mixture-pumping rear lift tube.Promote speed control in 2~3m/min；
（2）According to concrete coordination in works, stringent dispensing is stirred as required, it is ensured that workability, the uniformity of concrete；
（3）The concrete being stirred should carry out pressure injection by concrete transfer pump, and the filling of coagulation soil pressure should be carried out continuously；
（4）By code requirement, control the groundwater increment of last concrete, it is ensured that protection stake it is long >=500mm.
Beneficial effects of the present invention：（1）Change the design parameters such as long stake, stake diameter, pilespacing, bearing capacity can be made in wide range
Interior adjustment.
（2）There are higher bearing capacity, bearing power increase amplitude to be improved more to load-carrying capacity of soft soil foundation 250%~300%
Greatly.
（3）Settling amount is small, and stabilization is fast, such as falls CFG on harder soil layer, and it is heavy can more strictly to control ground
Drop amount（In 10mm）.
（4）Construction efficiency can be improved, reduces waste of material, reasonable arrangement form of construction work is to improve the quality of engineering.
Specific implementation mode
A kind of CFG pile driving constructions engineering method, includes the following steps：Smooth location, surveying setting-out → drilling machine installation, debugging → stake position
Delivering concrete → the guncreting of centering → drilling → in Ti Zuan to designed elevation → cleaning inter-pile soil, promoted drilling rod → at
Stake is checked and accepted.
Smooth location：It before construction, carries out " three supplies and one leveling ", meets construction needs.
Surveying setting-out
（1）The control point that owner or planning department provide is confirmed at the construction field (site).
（2）According to the control point and CFG bit plans provided, stake position axis, positioning are set with total powerstation or theodolite survey
Point.
（3）Embedded semipermanent control point：Control point is led into metastable position, and pays attention to protection, to construct
In check at any time.
（4）Measure stake site：According to review it is qualified after each axial line control point carry out stake position setting-out, when specific setting-out, adopt
With dual control method, and ensure the error of centralization≤1cm.The hole that depth is not less than 300mm is penetrated at stake with 8 reinforcing bars of φ, fills lime simultaneously
Plug bamboo stick, identification pile position.
（5）After discharging stake position, Quality Inspector, builder, class monitor and group leader is organized to check jointly stake position by person in charge of the technology aspect,
Confirm it is accurate after, with Party A or management handle preliminary examination sign formality.
Stake machine is in place：Stake machine in place must be smooth, firm, and immersed tube is vertical with ground holding, and perpendicularity deviation is not more than
1.5%；Stake machine plan-position deviation in place is less than 10 mm.Such as band precast concrete pile top, below ground 300mm need to be embedded to.
Drilling：（1）Chassis flatness is adjusted, after true fixed pile is errorless, makes drill rod axis perpendicular alignmnet hole position center,
Hammer that vertical to drilling rod and borer chassis is horizontal corrects into shape using two-wire, drilling rod verticality satisfaction≤1%L requirements.It is used in combination spirit level to survey
Go out ground elevation absolute altitude, determine the pore-forming drilling rod embedded depth of the cushion cap, and accurate location is marked in main upright bar.
（2）It can be used every a dozen one modes according to Pile Foundations Design situation when construction（It jumps and beats）To reduce soil compaction effect.
（3）In boring procedure rate of penetration will it is first slow after it is fast, specific rate of penetration according in work progress current value it is big
It is small to adjust at any time, it is ensured that current value≤120A in work progress prevents from causing because drilling rod shaking amplitude is excessive or amount of deflection is excessive
Stake diameter deviation is excessive.
（4）In boring procedure as find drilling rod acutely beat, rock or drilling depth compared with slow, electric current is bigger than normal and when being difficult to creep into,
It may be to encounter pan soil, stone or other hard objects etc., to stop to bore inspection immediately, it can after ascertaining the reason and obtaining handling suggestion
Continue to construct.It is stringent that stake holes deflection, stake seat in the plane is avoided to move, prevent drilling tool damage, drilling rod twists off etc., and accidents occur.
（5）Boring procedure should clear up the soil that aperture periphery drills out in time, such as find that drilling rod deflection, stake position are inaccurate therebetween
Situation should stop to bore immediately above to be carried, and is repositioned, is bored again after straightening, until design stake bottom absolute altitude.
（6）After getting into predetermined depth, it is necessary to carry out dallying clear native and then stop operating in original place, carry drilling rod.Pay attention in sky
Turn to deepen to creep into when clear soil；Drilling rod must not be turned round when carrying brill.Bottom hole loosened soil thickness must not exceed 10cm.
Concrete stirs：According to the strength grade of the concrete material of design, the match ratio provided according to laboratory is matched
It sets, slump is controlled in 180~200mm.Mixing water will meet national current standard《Concrete mixing water standard》.
Ground pump delivering concrete：（1）The riding position of concrete ground pump will be matched with the sequence of construction of drilling machine, be subtracted as possible
Few bend, concrete pump are generally advisable within 60 m at a distance from drilling machine.
（2）It is soaked using cement mortar before concrete pumping.
（3）The pumping of concrete will be carried out continuously, and when drilling machine shifts, the concrete in ground pump hopper should continuously stir,
When pumping, the height of hopper inner concrete should be kept, 400 mm must not be less than, plugging is caused to prevent inspiration air.
Guncreting：（1）The indices such as bore diameter, depth through on-site supervision engineer after the assay was approved, can
Concrete is perfused.Answer first mixture-pumping rear lift tube.Promote speed control in 2~3m/min.
（2）According to concrete coordination in works, stringent dispensing is stirred as required, it is ensured that the workability of concrete, uniformly
Property.
（3）The concrete being stirred should carry out pressure injection by concrete transfer pump, and the filling of coagulation soil pressure should be carried out continuously.
（4）By code requirement, control the groundwater increment of last concrete, it is ensured that protection stake it is long >=500mm.
（5）Construction journal, construction note are performed in time, records commencement date, Finish time, various drillings, perfusion in detail
Parameter.
（1）Deflected file controls
The spoir that pile foundation generates in the construction process is easy covering stake position and pile position deviation, rolling for stake machine movement is caused also to easily cause
Pile position deviation, to ensure that deflected file meets specification and design requirement, the spoir that construction is generated during ram machine construction answer and
When remove, should be reduced to the greatest extent in equipment moving process and stake site is rolled, avoid causing harmful effect to pile position deviation.Pile foundation
Stake position is controlled with dual control method in work progress, it is ensured that pile position deviation is within design drawing and specification allowable range.
（2）The control of pile body pile crown concrete strength
CFG as a kind for the treatment of process of composite foundation, the pump concrete slump of technological requirement is larger, especially on ground
In the case that lower water level is shallower, pile crown laitance is thicker to cause pile crown concrete strength certain harmful effect, cause pile crown
Concrete intensity insufficient, for this purpose, to be avoided floating according to the length of empty stake there are enough protection stakes are long during pile foundation construction
Starch the harmful effect to pile crown pile quality, it is ensured that pile crown pile quality meets design requirement.
（3）Pile silted
The spoir that generates during pile foundation construction, clod is fallen into that pile silted can be caused in stake holes, especially in the longer feelings of empty stake
Spoir, clod fall into and easily cause pile silted in stake holes especially under condition, therefore, spoir, clod should be avoided to fall during pile foundation construction
Enter in stake holes, and suitably increase and protect stake long, avoids the generation of pile silted common quality defect.
(4) pile body bubble
Pile foundation is in normal perfusion work progress, if air bleeding valve blocks, the air for generation of constructing cannot in time be arranged from air bleeding valve
Go out, the air for generation of constructing will enter in stake holes together with concrete, cause the generation of bubble in stake holes, to generate pile body
Bubble causes pile body loose porous, Concrete intensity insufficient, for this purpose, frequent during pile foundation construction, regular, regular check
Whether air bleeding valve is unimpeded, it is ensured that pile quality.
(5) pile body breaking
During pile foundation construction normal perfusion, if equipment fault, phenomena such as cutting off the water, have a power failure, holding up work for lack of material, will cause stake
The pause of the normal filling process of base causes the stake that completion is perfused twice, can cause broken pile at the handing-over position being perfused twice.
For this purpose, the generation for phenomena such as the avoiding equipment fault, cutting off the water, have a power failure, holding up work for lack of material that should try one's best during pile foundation construction,
If there is above-mentioned phenomenon, which will be constructed once to be perfused and be finished again.
(6) pile body face shaping is irregular
Pile foundation in the construction process, stake spacing is relatively close, formation weakness in the case of be easy to cause phase between stake and stake
The adverse effects such as interference are mutually squeezed, cause pile body in irregular shape.For this purpose, during pile foundation construction, it be according to different stakes
Spacing and the concrete condition of construction site are taken every stake is every the secondary construction method of row or construction method is constructed three times, to reduce stake
The harmful effect mutually squeezed between stake, to ensure pile quality.
Claims (6)
1. a kind of CFG pile driving constructions engineering method, which is characterized in that include the following steps：Smooth location, surveying setting-out → drilling machine installation,
Delivering concrete → the guncreting of debugging → stake position centering → drilling → in Ti Zuan to designed elevation → cleaning inter-pile soil, carry
Drilling rod → pile is risen to check and accept.
2. a kind of CFG pile driving constructions engineering method according to claim 1, which is characterized in that the surveying setting-out：（1）It is constructing
Scene confirms owner or the control point that planning department provides；
（2）According to the control point and CFG bit plans provided, stake position axis, anchor point are set with total powerstation or theodolite survey；
（3）Embedded semipermanent control point：Control point is led into metastable position, and pays attention to protection, so as in constructing with
Shi Fuhe；
（4）Measure stake site：According to review it is qualified after each axial line control point carry out stake position setting-out, when specific setting-out, using double
Control method, and ensure the error of centralization≤1cm；The hole that depth is not less than 300mm is penetrated at stake with 8 reinforcing bars of φ, fills lime and is plugged
Bamboo stick, identification pile position.
3. a kind of CFG pile driving constructions engineering method according to claim 1, which is characterized in that the drilling machine installation and debugging：Stake machine
In place must be smooth and firm, immersed tube is vertical with ground holding, and perpendicularity deviation is not more than 1.5%；Stake machine plan-position in place is inclined
Difference is less than 10 mm；Such as band precast concrete pile top, below ground 300mm need to be embedded to.
4. a kind of CFG pile driving constructions engineering method according to claim 1, which is characterized in that the drilling：（1）It is flat to adjust chassis
Whole degree, after true fixed pile is errorless, makes drill rod axis perpendicular alignmnet hole position center, and drilling machine vertical to drilling rod is hammered into shape using two-wire
Chassis level corrects, drilling rod verticality satisfaction≤1%L requirements；
（2）It can be used every a dozen one modes according to Pile Foundations Design situation to reduce soil compaction effect when construction；
（3）In boring procedure rate of penetration will it is first slow after it is fast, specific rate of penetration according to the size of current value in work progress with
When adjust, it is ensured that current value≤120A in work progress prevents from leading to a diameter because drilling rod shaking amplitude is excessive or amount of deflection is excessive
Deviation is excessive；
（5）Boring procedure should clear up the soil that aperture periphery drills out in time, therebetween as found situations such as drilling rod deflection, stake position are not allowed
It should stop to bore immediately and above carry, reposition, bored again after straightening, until design stake bottom absolute altitude；
（6）After getting into predetermined depth, it is necessary to carry out dallying clear native and then stop operating in original place, carry drilling rod；Pay attention to clear in idle running
It must not deepen to creep into when native；Drilling rod must not be turned round when carrying brill；Bottom hole loosened soil thickness must not exceed 10cm.
5. a kind of CFG pile driving constructions engineering method according to claim 1, which is characterized in that the ground pump delivering concrete：（1）
The riding position of concrete ground pump will be matched with the sequence of construction of drilling machine, reduce bend to the greatest extent, concrete pump and drilling machine away from
From being generally advisable within 60 m；（2）It is soaked using cement mortar before concrete pumping；（3）The pumping of concrete will connect
Continuous to carry out, when drilling machine shifts, the concrete in ground pump hopper should continuously stir, and when pumping, should keep hopper inner concrete
Highly, 400 mm must not be less than, plugging is caused to prevent inspiration air.
6. a kind of CFG pile driving constructions engineering method according to claim 1, which is characterized in that the guncreting：（1）Drilling
Through on-site supervision engineer after the assay was approved, concrete can be perfused in the indices such as diameter, depth；It is carried after answering first mixture-pumping
Pipe promotes speed control in 2~3m/min；
（2）According to concrete coordination in works, stringent dispensing is stirred as required, it is ensured that workability, the uniformity of concrete；
（3）The concrete being stirred should carry out pressure injection by concrete transfer pump, and the filling of coagulation soil pressure should be carried out continuously；
（4）By code requirement, control the groundwater increment of last concrete, it is ensured that protection stake it is long >=500mm.
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| CN201810165692.3A CN108385669A (en) | 2018-02-28 | 2018-02-28 | A kind of CFG pile driving constructions engineering method |
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| CN201810165692.3A CN108385669A (en) | 2018-02-28 | 2018-02-28 | A kind of CFG pile driving constructions engineering method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109235429A (en) * | 2018-10-12 | 2019-01-18 | 中铁六局集团有限公司 | A kind of multidirectional concrete-cored mortar mixing pile construction engineering method of marine facies geology |
| CN110359449A (en) * | 2019-07-02 | 2019-10-22 | 毛宗原 | A kind of grouting behind shaft or drift lining CFG preparation methods of reinforcement of anti-breaking pile crown |
| CN111719558A (en) * | 2020-06-29 | 2020-09-29 | 中能建西北城市建设有限公司 | CFG pile composite foundation construction process |
| CN113153191A (en) * | 2021-02-24 | 2021-07-23 | 中基发展建设工程有限责任公司 | Long spiral drilling machine and construction method of air-entrapping CFG pile |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107246007A (en) * | 2017-07-18 | 2017-10-13 | 北京中润宝成工程技术有限公司 | A kind of construction method CFG |
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2018
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107246007A (en) * | 2017-07-18 | 2017-10-13 | 北京中润宝成工程技术有限公司 | A kind of construction method CFG |
Non-Patent Citations (1)
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| CDJYHT: "《豆丁网》", 8 June 2016 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109235429A (en) * | 2018-10-12 | 2019-01-18 | 中铁六局集团有限公司 | A kind of multidirectional concrete-cored mortar mixing pile construction engineering method of marine facies geology |
| CN110359449A (en) * | 2019-07-02 | 2019-10-22 | 毛宗原 | A kind of grouting behind shaft or drift lining CFG preparation methods of reinforcement of anti-breaking pile crown |
| CN111719558A (en) * | 2020-06-29 | 2020-09-29 | 中能建西北城市建设有限公司 | CFG pile composite foundation construction process |
| CN111719558B (en) * | 2020-06-29 | 2021-09-21 | 中能建西北城市建设有限公司 | CFG pile composite foundation construction process |
| CN113153191A (en) * | 2021-02-24 | 2021-07-23 | 中基发展建设工程有限责任公司 | Long spiral drilling machine and construction method of air-entrapping CFG pile |
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Application publication date: 20180810 |