CN105714773B - A kind of method for processing foundation - Google Patents
A kind of method for processing foundation Download PDFInfo
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- CN105714773B CN105714773B CN201610116424.3A CN201610116424A CN105714773B CN 105714773 B CN105714773 B CN 105714773B CN 201610116424 A CN201610116424 A CN 201610116424A CN 105714773 B CN105714773 B CN 105714773B
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- steel pipe
- pile
- soil
- building waste
- grouting
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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
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/44—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with enlarged footing or enlargements at the bottom of the pile
Abstract
The present invention proposes a kind of method for processing foundation, and this method is easy for construction, available for deep ground of the processing more than 15 meters, specifically comprises the following steps：(1) immersed tube：Steel pipe is sunk to the pile top for being resisted against steel pipe lower surface by underground using vibratory pile drive and extractor together, steel pipe lower surface is reached designed elevation, pile top forms closing to the lower end of steel pipe；(2) Grouting Pipe is placed in steel pipe, the bottom of Grouting Pipe reaches pile top；(3) enlarged footing is made；(4) continue to insert plain soil and/or building waste into steel pipe, and tamp；(5) repeat step (4) is until element soil and/or building waste reach steel pipe top and closely knit；(6) slip casting, injection cement mortar is carried out into enlarged footing and steel pipe by Grouting Pipe, Grouting Pipe is promoted on marginal not slurry side upwards, until whole steel pipe is filled with cement mortar；(7) steel pipe is pulled out after slip casting terminates, forms support pile；(8) mattress layer is laid at the top of support pile.
Description
Technical field
The present invention relates to a kind of processing method available for deep foundation base.
Background technology
The method of basement process, especially deep foundation base processing is a lot, mainly has at present, soil and lime soil pile compacting method, water
The method for processing foundation such as mud flyash gravel pile and deep-mixed pile, and the carrier pile derived by above-mentioned method for processing foundation
Method and rammer expand the method for processing foundation such as rubbish stake method.
Wherein, soil and lime soil pile compacting method are mainly for the treatment of collapsible loess more than level of ground water, plain fill and miscellaneous
The foundation reinforcement method to banket etc., it is to have compacted soil between stake and fill out the composite foundation that the stake of rammer collectively constitutes, when to eliminate ground
Settlement by soaking when being main purpose, preferably using native stake；When using improve ground bearing capacity or water stability as main purpose when, preferably select
With lime soil pile, handling depth, one is 5~15 meters.
When the water content of foundation soil is more than 23% and its saturation degree is more than 0.65, because hole quality is bad, after tube drawing
Easy necking down, and easily damaged to closing on the pile body backfilled when breaking pipe, it is not easy using soil and lime soil pile compacting method.
CFG, it is to mix appropriate aggregate chips, flyash and a small amount of cement on the basis of broken stone pile to add
Water stirring after a kind of manufactured pile body with some strength, its aggregate is still rubble, be suitable for sand, silt, loose fill,
The processing of silty clay, clay and silt clay etc., reinforcement depth one at 6~12 meters.
Deep mixing method is by the use of cement or cement mortar as curing agent, by special Mixing Machine, in ground depth
Place is on the spot by weak soil and curing agent action of forced stirring, and caused a series of physical-chemical reaction between curing agent and weak soil, makes soft
Soil scleroma deforms into the high-quality ground with globality, water stability and some strength so as to improve the intensity of ground and increase
Modulus, it is a kind of new method for reinforcing saturation cohesive soil ground, is used in processing mud, muck soil, silt and aqueous
The grounds such as cohesive soil of the higher and foundation bearing capacity standard value no more than 120kPa are measured, it is more notable to ultra-soft soil effect.
But it is using the stirring-head equipment integrated with feed pipe for mortar, when viscous between clay particle during deep mixing method construction
When knot power is strong, it is not easy to stir, is also easy to produce to embrace in whipping process and bores；In addition when soil property is easy to stir, but easily occur
Grout phenomenon.The conventional frame of current deep-mixing pile driver has three kinds of forms：Tower-type, masts type and walking, tower-type
Simple, easy to process with mast type structure, application is more, but it is set up and difficulty in walking, and the mechanization degree of walking is high, tower
Frame is highly big, and drilling depth is big, but machinery expenses are higher.
Carrier pile method is a kind of brand-new construction technology, and it changes traditional dealing with foundation idea, selects bottom
Layer position is stable, the preferable soil layer of soil nature is used as and is reinforced soil layer, using pile-end soil body as research object.The bearing capacity of common stake is main
From the side friction of stake, and the bearing capacity of carrier pile is essentially from carrier, carrier by insert building waste repeatedly again with
3.5 tons of weights lift 6 meters of progress freely falling body compactings, by the norm controlling compactness such as penetration, then ram again and fill out one
Quantitative dry concrete, so as to form the carrier that dry concrete, inserts and solid soil are formed from inside to outside, make
Pile-end soil body obtains optimal closely knit, and upper load is effectively passed to following bearing stratum, reaches the mesh for improving bearing capacity
's.
Ramming enlarging building refuse stake method is extended to by broken stone pile, is after weight is hung certain altitude with crane, freely
Fall, for several times impact holing, layering inserts waste material rear screed and expands pile, rams and expands the shallow foundation that rubbish stake is adapted to 4~8m of processing or so.
These above-mentioned method for processing foundation are used in different basement process, are respectively provided with the advantages of respective, but it has one
The shortcomings that common, be exactly these method for processing foundation in work progress, the material of pile body can spread into soil, pile body it is straight
Footpath is difficult to control, and the bearing capacity between each pile body differs greatly, and this causes the maximum processing depth one of these method for processing foundation
Stock is controlled within 15 meters, and cost-effective processing method is there is no at present to the deep basement process more than 15 meters.
The content of the invention
In view of the above-mentioned problems, the present invention proposes a kind of method for processing foundation, this method is that steel pipe is first sunk in ground,
Then plain soil and/or building waste are inserted in steel pipe, cement mortar is finally injected, forms a kind of support pile, this method construction party
Just, available for deep ground of the processing more than 15 meters.
The specific steps of the present invention include：
(1) immersed tube：Steel pipe is sunk to the pile top for being resisted against steel pipe lower surface by underground using vibratory pile drive and extractor together, made
Steel pipe lower surface reaches designed elevation, and pile top forms closing to the lower end of steel pipe；Vibratory pile drive and extractor preferentially uses hydraulic vibration
Extracting-driving pile machine；In the prior art, the use of pile top is very universal, disclosure satisfy that the needs of the application, repeats no more；
(2) Grouting Pipe is placed in steel pipe, the bottom of Grouting Pipe reaches pile top；
(3) enlarged footing is made：Plain soil and/or building waste are inserted into steel pipe, compaction rod is put into steel pipe and is pressed in
On plain soil, compaction rod is clamped with the fixture of above-mentioned vibratory pile drive and extractor, plain soil and/or building waste are vibrated, improve element
The compactness of soil and/or building waste, and pile top is departed from steel pipe lower surface and move down, part element soil and/or building waste
Overflowed from steel pipe lower end and form enlarged footing in steel pipe lower end；
(4) continue to insert plain soil and/or building waste into steel pipe, and tamp；
(5) repeat step (4) is until element soil and/or building waste reach steel pipe top and closely knit；
(6) slip casting, injection cement mortar is carried out into enlarged footing and steel pipe by Grouting Pipe, slip casting is promoted on marginal not slurry side upwards
Pipe, until whole steel pipe is filled with cement mortar；
(7) steel pipe is pulled out after slip casting terminates, forms support pile；
(8) mattress layer is laid at the top of support pile；
The compaction rod is provided with the shaped steel of level board for the steel pipe of lower end closed or lower end, shaped steel can use round steel,
The section steel manufactures such as channel-section steel, angle steel.The main function of compaction rod is stretched into steel pipe, by the vibration force for transmitting vibratory pile drive and extractor
Amount is extruded plain soil and/or building waste, to improve the compactness of element soil and/or building waste.
Vibratory pile drive and extractor preferentially uses hydraulic vibration extracting-driving pile machine.
It is 1~2 meter to insert plain soil and/or the highly preferred of building waste every time.
Immersed tube device therefor uses vibratory pile drive and extractor, and vibratory pile drive and extractor has electrodynamic type and the major class of fluid pressure type two, at this
Hydraulic vibration extracting-driving pile machine is preferably used in application, due to the appearance and size of the hydraulic vibration driver of hydraulic vibration extracting-driving pile machine is small,
It is in light weight, in the case where exciting force is similar, the weight of hydraulic vibration driver one there was only the half of electrodynamic type vibration hammer weight, tool
There is a higher Oscillation Amplitude, immersed tube effect is good.Hydraulic vibration extracting-driving pile machine can easily change the vibration frequency of hydraulic vibration driver,
With the geological conditions according to different grounds, optimal immersed tube effect is reached using different vibration frequencies；Using same equipment
All work such as closely knit and tube drawing of immersed tube, element soil and/or building waste can be completed, improves utilization rate of equipment and installations and construction effect
Rate.
The frequency of the hydraulic vibration driver of hydraulic vibration extracting-driving pile machine can be adjusted, by the frequency for adjusting hydraulic vibration driver
Rate can obtain required compactness, and can ensure that the compactness up and down of pile body is consistent.
In this application, building waste can be inserted into steel pipe, the building waste inserted in steel pipe must not contain organic miscellaneous
Matter, caused cement block, crushed stone, fragment of brick, rubble and waste mortar etc when building or structures removal only can be used
Waste material, the waste materials such as asphalt blocks, waste plastics, old metal and useless bamboo wood must not be included.Engineering cost can not only be reduced using building waste
With can also consume substantial amounts of building waste, and contribution is made that for the environmental protection treatment of these building wastes.
The diameter of enlarged footing is preferably 1.5~3 times of diameter of steel tube, is imitated with ensureing that enlarged footing can provide effective resistance to plucking
Fruit.
Further, the ratio of mud of cement mortar is 0.6~1.2；During slip casting, grouting pressure is 0.4MPa~0.6MPa,
Flow rate of grouting is 50L/min~70L/min.The grouting process can ensure that pile body has enough intensity, it is not necessary to pursue high slip casting
Pressure.
The present invention is that steel pipe and pile top with sealing process sunk into underground together, and the soil in ground will not enter steel
Guan Zhong, the hole among steel pipe turn into stake holes, and the original soil body in stake holes position is forced lateral compression, makes stake week a range of
Soil layer compactness improves, and is overlapped mutually in the compacted compacted effect of area's intersection of adjacent stake holes, and the smaller Overlay of pilespacing is brighter
It is aobvious.
The stake holes formed in the prior art by the soil body itself, when water content is more than 23% in foundation soil and its saturation degree is more than
When 0.65, hole quality is bad, easily occurs stake holes necking after tube drawing, and this causes the length of pile body to be restricted, its institute
Treatable ground depth is also controlled in the range of 15 meters；And when ground is softer, in pile body work progress, stake holes
In the material inserted be easy to spread into the soil body around stake holes, make pile body occur oxygen blast cyanidation even pile body dislocation phenomena such as,
The intensity of pile body is reduced, while also makes the uniformity of strength of the mixing pile poor；The support pile made using the present invention, due to big portion
Point work be to be carried out in steel pipe, influenceed by the water content of ground and the saturation degree of water less, while steel pipe is to pile body
Constraint effect is served, on the one hand the material inserted in stake holes can be prevented to be squeezed into the soil body of surrounding, on the other hand can ensured
In slip casting, high-pressure slip-casting can be used, cement mortar is evenly distributed among material, the intensity of pile body is guaranteed,
The uniformity of strength of the mixing pile is also improved, after filling cement mortar in pile body, pile body is provided with the energy of certain resistance underground water
Power.
The method for processing foundation of the present invention has been saved and excavated and the workload of the plain earthwork without digging up and filling in, due to not by
The limitation excavated and backfilled, simultaneously because being collapsed without stake holes, makes processing depth up to 20 meters, more native and lime-soil compaction pile method
With deeper foundation treatment depth, the material category inserted in steel pipe is gathered materials on the spot, and reduces operating expenses.
Using steel pipe as stake holes, influence of the surrounding soil body to work progress is avoided, in theory not by ground soil property
Influence, be particularly suitable for use in the grounds such as processing loosening sand, silt, silty clay, plain fill, miscellaneous fill and saturation clay.
Support pile made by the present invention is substantially a kind of low intensive concrete-pile, can make full use of holding for inter-pile soil
Power is carried, collective effect, transfers loads in deep foundation base, there is preferable technical performance and economic effect.
The pile body settlement amount of support pile made by the present invention is small, can be more strictly when pile body falls when on compared with hard stratum
Settlement of foundation is controlled, by settlement of foundation control within 7mm.
Being made in the lower end of support pile has enlarged footing, and to strengthen holding power of the soil layer to pile body, while enlarged footing can be stake
Body provides larger resistance to plucking resistance, and when especially water level is higher in ground, enlarged footing also makes pile body have certain anti-floating ability.
In the application, main construction equipment vibratory pile drive and extractor, without other large-scale construction equipments, it is convenient to apply
Work, it ensure that the efficiency of construction.
After the making of pile body is completed, steel pipe, recycling, to reduce the expense of basement process are extracted.
Brief description of the drawings
Fig. 1 is a kind of schematic flow sheet of embodiment of the present invention.
Fig. 2 is the structure diagram of compaction rod.
Fig. 3 is Fig. 2 top view.
Fig. 4 is that compaction rod is located in steel pipe, and to sketch that plain soil is compacted.
Marked in figure：
1. steel pipe, 2. pile tops, 3. Grouting Pipes, 4. enlarged footings, 5. mattress layers, 10. compaction rods, 11. channel-section steels, 12. level boards.
Embodiment
Make compaction rod 10 first in this embodiment, refering to Fig. 2, Fig. 3, compaction rod 10 is that lower end is provided with level board 12
Channel-section steel 11, level board 12 are circular steel plate, and channel-section steel 11 and level board 12 weld together, and the diameter of level board 12 relatively makes supporting
The small 180mm of internal diameter of steel pipe used in stake, element soil or building waste are filled into steel pipe to facilitate.
In the present embodiment, the external diameter of steel pipe is 426mm, a diameter of 800mm of enlarged footing；Vibratory pile drive and extractor uses model
For 815C Dutch ICE hydraulic vibration drivers, hereinafter referred to as hydraulic vibration driver.
In the present embodiment, what is inserted into steel pipe 1 is the compound of plain soil and building waste, hereinafter referred to as compound.
Refering to Fig. 1, the step of making support pile, is as follows：
(1) immersed tube：Steel pipe 1 is sunk into underground with hydraulic vibration driver, pile top 2, pile top 2 are provided with the lower surface of steel pipe 1
Steel pipe 1 is formed and closed, avoids the soil in ground from entering in steel pipe 1；
(2) three Grouting Pipes 3 are uniformly placed in the inwall of the interior edge steel pipe 1 of steel pipe 1, and the bottom of Grouting Pipe 3 is reached stake
Point 2；Grouting Pipe 3 uses diameter 20mm seamless steel pipe；
(3) enlarged footing 4 is made：Refering to Fig. 4, compound is inserted into steel pipe 1, the above-mentioned compaction rod 10 made is put into
In steel pipe 1, the upper end of compaction rod 10 is clamped with the fixture of hydraulic vibration driver, starts hydraulic vibration driver, keeps to compound
Pressure, compaction rod 10 is vibrated compound, in process of vibrating, the volume of compound is compressed, and make pile top 2 to
Under be moved out the lower surface of steel pipe 1, compound overflows from the lower end of steel pipe 1, and completes to expand in the presence of compaction rod 10
The making of head, then stops hydraulic vibration driver；
(4) continue to insert compound and closely knit into steel pipe 1；Complete every time it is closely knit after, compaction rod 10 is lifted 2 meters,
Then insert about 1.8 meters of compound of height into steel pipe 1, level board 12 of the compound along compaction rod 10 and the inwall of steel pipe 1 it
Between hole fall into below compaction rod 10, then compaction rod 10 is transferred, compresses compound, start hydraulic vibration driver, to mixing
Material carries out closely knit；
(5) repeat step (4) is until compound reaches the top of steel pipe 1 and closely knit；
(6) slip casting, injection cement mortar is carried out into enlarged footing and steel pipe by Grouting Pipe, slip casting is promoted on marginal not slurry side upwards
Pipe, until whole steel pipe is filled with cement mortar；In the present embodiment, the ratio of mud of cement mortar is 0.9, and grouting pressure is
0.5MPa, flow rate of grouting 60L/min；
(7) steel pipe is pulled out with hydraulic vibration driver after slip casting terminates, forms support pile；
(8) mattress layer 5 is laid at the top of support pile；
Compaction rod can also use the steel pipe of lower end closed, or in the welding of the lower end of the shaped steel such as round steel, channel-section steel, angle steel or use
Bolt connection level board is made.
The diameter of level board can be determined according to the size of the particle of the plain soil or building waste of addition, when particle is big,
Smaller, the particle hour that the diameter of level board can be set, the diameter of level board can be set it is larger, in order to ensure water
Flat board have to plain soil and/or building waste certain contact surface, the diameter of level board and the difference of pipe diameter 80~300mm it
Between be advisable.
Claims (6)
1. a kind of method for processing foundation, comprises the following steps：
(1) immersed tube：Steel pipe is sunk to the pile top for being resisted against steel pipe lower surface by underground using vibratory pile drive and extractor together, makes steel pipe
Lower surface reaches designed elevation, and pile top forms closing to the lower end of steel pipe；
(2) Grouting Pipe is placed in steel pipe, the bottom of Grouting Pipe reaches pile top；
(3) enlarged footing is made：Plain soil and/or building waste are inserted into steel pipe, compaction rod is put into steel pipe and is pressed in plain soil
And/or on building waste, compaction rod is clamped with the fixture of above-mentioned vibratory pile drive and extractor, plain soil and/or building waste are shaken
Smash, improve the compactness of element soil and/or building waste, and pile top is departed from steel pipe lower surface and move down, part element soil and/or
Building waste overflows from steel pipe lower end and forms enlarged footing in steel pipe lower end；
(4) continue to insert plain soil and/or building waste into steel pipe, and it is closely knit；
(5) repeat step (4) is until element soil and/or building waste reach steel pipe top and closely knit；
(6) slip casting, injection cement mortar being carried out into enlarged footing and steel pipe by Grouting Pipe, Grouting Pipe is promoted on marginal not slurry side upwards,
Until whole steel pipe is filled with cement mortar；
(7) steel pipe is pulled out after slip casting terminates, forms support pile；
(8) mattress layer is laid at the top of support pile；
The compaction rod is provided with the shaped steel of level board for the steel pipe of lower end closed or lower end.
2. method for processing foundation according to claim 1, it is characterised in that：The ratio of mud of cement mortar is 0.6~1.2.
3. method for processing foundation according to claim 1, it is characterised in that：During slip casting, grouting pressure 0.4MPa
~0.6MPa, flow rate of grouting are 50L/min~70L/min.
4. method for processing foundation according to claim 1, it is characterised in that：Steel pipe used in a diameter of immersed tube of enlarged footing is straight
1.5~3 times of footpath.
5. method for processing foundation according to claim 1, it is characterised in that：Plain soil and/or building waste are inserted every time
Highly it is 1~2 meter.
6. method for processing foundation according to claim 1, it is characterised in that：Vibratory pile drive and extractor is the heavy pile pulling of hydraulic vibration
Machine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610116424.3A CN105714773B (en) | 2016-03-01 | 2016-03-01 | A kind of method for processing foundation |
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|---|---|---|---|
| CN201610116424.3A CN105714773B (en) | 2016-03-01 | 2016-03-01 | A kind of method for processing foundation |
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| CN105714773A CN105714773A (en) | 2016-06-29 |
| CN105714773B true CN105714773B (en) | 2017-11-28 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107794917A (en) * | 2016-09-02 | 2018-03-13 | 石午江 | A kind of no atmosphere pollution and the hammering pore-forming piling method of hammering noise very little |
| CN109098167A (en) * | 2017-06-20 | 2018-12-28 | 九州职业技术学院 | The processing construction and its construction method of old mining area depth mud |
| CN108797577A (en) * | 2018-07-12 | 2018-11-13 | 上海市城市建设设计研究总院（集团）有限公司 | Crushed stone grouting pile with extruding-enlarging branch tray and its construction method |
| CN109518685B (en) * | 2018-11-14 | 2021-05-04 | 天津中海水利水电工程有限公司 | Underwater precast pile structure and construction method thereof |
| CN109680671A (en) * | 2019-02-22 | 2019-04-26 | 海南大学 | A kind of liquefaction foundation treatment method based on building waste |
| CN113699980B (en) * | 2021-07-26 | 2022-10-14 | 宁波华宇建设有限公司 | Deep foundation treatment method |
| CN115305912A (en) * | 2022-02-14 | 2022-11-08 | 高云飞 | Tubular pile grouting, tamping and vibrating bottom expanding construction method |
| CN115748674B (en) * | 2022-12-12 | 2023-09-22 | 中建八局第三建设有限公司 | Leakage-proof anti-pulling pile |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SE501607C2 (en) * | 1993-03-28 | 1995-03-27 | Soilex Ab | Procedure for casting piles |
| CN2280116Y (en) * | 1997-01-31 | 1998-04-29 | 王继忠 | Heavey hammer tamping bottom of immersed tube method for building bored concrete pipe of refuse heap |
| CN1364961A (en) * | 2002-02-28 | 2002-08-21 | 王光明 | Foundation reinforcing mode |
| CN100375820C (en) * | 2004-12-28 | 2008-03-19 | 王继忠 | Construction method for concrete pile |
| CN101487254A (en) * | 2009-02-13 | 2009-07-22 | 郝东明 | Construction method of vibrating immersed tube gravel slip-casting pile |
| CN102733378B (en) * | 2012-04-25 | 2013-12-04 | 王继忠 | Construction method of concrete pile |
| CN104727309A (en) * | 2015-02-02 | 2015-06-24 | 中国电力工程顾问集团中南电力设计院有限公司 | Construction technology of squeeze-in expanded-base pipe pile |
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