CN107100160B - A kind of construction technology for lower storage reservoir check dam vibro-replacement stone column - Google Patents
A kind of construction technology for lower storage reservoir check dam vibro-replacement stone column Download PDFInfo
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- CN107100160B CN107100160B CN201710489252.9A CN201710489252A CN107100160B CN 107100160 B CN107100160 B CN 107100160B CN 201710489252 A CN201710489252 A CN 201710489252A CN 107100160 B CN107100160 B CN 107100160B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/08—Improving by compacting by inserting stones or lost bodies, e.g. compaction piles
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- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
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Abstract
The invention discloses a kind of construction technologies for lower storage reservoir check dam vibro-replacement stone column, the technique opens up center injected hole and circumferential injected hole by drilling machine respectively around broken stone pile and broken stone pile, when slurries penetrate into the soil body around loosened by center injected hole and circumferential injected hole, can by its it is cementing be an entirety, greatly improve its whole compactness and effective stress, the property for improving pile peripheral earth, improves bearing capacity；On the other hand, slurries eliminate the influence of mudcake, so that the cementing power of pile body and soil around pile also enhances, to improve frictional force in side-pile, while stake produces effect of contraction to soil around pile, prevent the lateral deformation of soil around pile when permeating to stake side.
Description
Technical field
The present invention relates to builds to foundation engineering technical fields, in particular to a kind of to be used for lower storage reservoir check dam vibro-replacement stone column
Construction technology.
Background technique
China strand, regions are widely distributed along the river etc. the soft foundations such as marine clay, muck soil, wherein some regions
Only soft base is distributed in shallow-layer；Though some engineering soft bases are small compared with deep but project management model, required processing depth is also smaller.Above two class
The soft base of situation, rule of thumb, it is necessary to use certain treatment measures, sedimentation and stability requirement can be reached.Therefore, for upper
Two class situations are stated, shallow layer reinforcement processing must be carried out to soft foundation during road construction, to control settlement after construction, it is ensured that
Stablize safety.
Currently, common shallow layer foundation processing mode mainly has cushion, compound foundation method, draining concretion method, light-weight foamed
Local method etc..Cushion has obvious effect to roadbed compactness is improved, but smaller to total settlement effect is reduced, and needs a large amount of
Outward transport is dug, energy conservation and environmental protection theory is not met；Light-weight foamed local method construction needs a variety of machinery such as foam, stir, constructing operation
The problems such as complexity, cost are even higher than cement mixing pile composite foundation method, and there are anti-floatings, durability, therefore do not recommend shallow
Layer basement process uses；The half-rigidity piles composite foundations technique such as cement mixing pile is more mature, but construction machinery is heavy, therefore does not push away
Shallow layer foundation processing is recommended to use；The rigid pile composite foundations effect such as prestressed concrete pipe pile, cast-in-situ bored pile is best, but cost
Height is not recommended to handle for shallow layer foundation；Draining concretion method cost performance is high, but long in time limit, and the engineering tight for construction period is not
It is applicable in.
Summary of the invention
The object of the present invention is to provide a kind of construction technologies for lower storage reservoir check dam vibro-replacement stone column, and which improve stakes
The property of Zhou Tuti, improves bearing capacity.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of construction technology for lower storage reservoir check dam vibro-replacement stone column, the technique include the following steps:
S1: place cleaning powers on, water source；
S2: construction equipment is in place, lifts by crane vibrating impacter align piles position；
S3: pore-creating:
(a) vibrating impacter align piles position, first cracking pressure water pump restart vibrating impacter after vibrating impacter outlet water at tail end mouth is sprayed water,
Start pore-creating to vibrating impacter normal operation, make vibrating impacter blow slowly injection soil in, until design supporting course；
(b) vibrating impacter should be at overhang in poration process；There are rubber absorbers to be coupled between vibrating impacter and conduit, because
This conduit have it is slightly deflected be allowed, but deflection cannot be excessive, prevents vibrating impacter from deviateing injection direction；
S4: borehole cleaning: the mud returned out when pore-creating is thick or hole in have narrow or shrinkage cavity location that should carry out borehole cleaning；Borehole cleaning is by vibroflotation
Device proposes aperture or reaming location is being needed to lift vibrating impacter repeatedly up and down, keeps aperture return of drilling mud thinning, guarantees that vibroflotation hole is suitable
It is straight-through freely to be sunk with sharp filler；
S5: filler encryption: using forced filler stake technique；Continuously construct when stake processed, encrypt since bottom hole, paragraph by paragraph to
On, centre does not have leakage；After reaching the encryption electric current and load time of design code, vibrating impacter is above mentioned continue it is next
A section of encryption, every section of encryption length Pass Test requirement；
S6: repeating step (5) work, from bottom to top, until being encrypted into design requirement stake top absolute altitude；
S7: closing vibrating impacter, Guan Shui, and stake processed terminates；
S8: it boring injected hole: drilling out center injected hole at broken stone pile center by drilling machine, injected hole runs through the both ends of broken stone pile,
And at least four circumferential direction injected hole is drilled out by drilling machine on broken stone pile peripheral ground is circumferential；
S9: slip casting: insertion Grouting Pipe is distinguished to bottom by Grouting Pipe in the center injected hole and circumferential injected hole
To center injected hole and circumferential injected hole slip casting, using the grouting method of the uniform tube drawing in mud jacking, tube drawing should be according to note for slip casting
Based on slurry amount is controlled, the spacing of each tube drawing is 0.5m, and uninterrupted slip casting, until aperture frost boiling specific gravity reaches injection mortar
It, can a tube drawing when specific gravity 95%.
By using above-mentioned technical proposal, cement slurry is injected from center injected hole, the density and structure of broken stone pile can be improved
Structural strength, reduces the sedimentation of broken stone pile, and circumferential injected hole is circumferentially opened up on broken stone pile surrounding ground, and in circumferential injected hole
Interior injection cement slurry, makes the sand around broken stone pile be hardened, and improves the side-friction force of broken stone pile, further decreases broken stone pile
Sedimentation.
Further, the specific method of pore-creating and borehole cleaning is, vibrating impacter water spray center and aperture center deviation be not when construction
It obtains and is greater than 5cm；After vibroflotation pore-creating, pore-forming center and construction drawing centre of location deviation are not greater than 10cm；Stake top center and fixed
Position centre deviation is not greater than 0.25 times of stake holes diameter；It should keep vertical in vibrating impacter injection soil；Every 1 ~ the 2m of injection of vibrating impacter
Hole section should record a pore-creating electric current, hydraulic pressure and time, until depth of the injection to test determination；Complete Kong Houying borehole cleaning 1 ~ 2
Time.
Further, the filling method is using forced stuffing process.
By using above-mentioned technical proposal, using forced filler, mainly using the self weight of vibrating impacter and vibration force by hole
Top filler is sent to the lower part in hole.
Further, the encryption method is that stake voltage processed is 380V, and fluctuation is more than that ± 20V must not construct；Encrypt electric current
90A；10 ~ 12s of load time；Pore-creating 0.4 ~ 0.6MPa of hydraulic pressure encrypts 0.3 ~ 0.5MPa of hydraulic pressure；Encrypt 30 ~ 50cm of segment length；It answers
Encryption electric current and load time are controlled with automatic electrical control system；Encryption is since bottom hole, and paragraph by paragraph upwards, centre is not leaked
Vibration, is encrypted into earth's surface.
Further, grouting test is carried out before slip casting first, determines the ratio of mud and grouting pressure.
By using above scheme, with the suitable ratio of mud of determination and grouting pressure, it is ensured that grouting quality.
Further, continuous feed supplement during for center injected hole slip casting, stake top slurry sinks after slip casting, carries out recharge.
It raises difficult questions by using above-mentioned technology, since vibration during to slip casting due to Grouting Pipe will cause aperture stone
Material sinks, therefore answers continuous feed supplement during slip casting, and stake top slurries can sink after slip casting, should also carry out recharge operation.
In conclusion the invention has the following advantages: slurry infiltration loosened to surrounding the soil body when, can be cementing by its
For an entirety, its whole compactness and effective stress are greatly improved, the property of pile peripheral earth is improved, improves
Bearing capacity；On the other hand, slurries eliminate the influence of mudcake when permeating to stake side, so that pile body and soil around pile is cementing
Ability also enhances, to improve frictional force in side-pile, while stake produces effect of contraction to soil around pile, prevents the side of soil around pile
To deformation.
Detailed description of the invention
Fig. 1 is the process flow chart of invention.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the protection scope of invention.
A kind of construction technology for lower storage reservoir check dam vibro-replacement stone column, technique include the following steps:
S1: place cleaning powers on, water source；
S2: construction equipment is in place, lifts by crane vibrating impacter align piles position；
S3: pore-creating:
(a) vibrating impacter align piles position, first cracking pressure water pump restart vibrating impacter after vibrating impacter outlet water at tail end mouth is sprayed water,
Start pore-creating to vibrating impacter normal operation, make vibrating impacter blow slowly injection soil in, until design supporting course；
(b) vibrating impacter should be at overhang in poration process；There are rubber absorbers to be coupled between vibrating impacter and conduit, because
This conduit have it is slightly deflected be allowed, but deflection cannot be excessive, prevents vibrating impacter from deviateing injection direction；
S4: borehole cleaning: the mud returned out when pore-creating is thick or hole in have narrow or shrinkage cavity location that should carry out borehole cleaning；Borehole cleaning is by vibroflotation
Device proposes aperture or reaming location is being needed to lift vibrating impacter repeatedly up and down, keeps aperture return of drilling mud thinning, guarantees that vibroflotation hole is suitable
It is straight-through freely to be sunk with sharp filler；
S5: filler encryption: using forced filler stake technique；Continuously construct when stake processed, encrypt since bottom hole, paragraph by paragraph to
On, centre does not have leakage；After reaching the encryption electric current and load time of design code, vibrating impacter is above mentioned continue it is next
A section of encryption, every section of encryption length Pass Test requirement；
S6: repeating step (5) work, from bottom to top, until being encrypted into design requirement stake top absolute altitude；
S7: closing vibrating impacter, Guan Shui, and stake processed terminates；
S8: it boring injected hole: drilling out center injected hole at broken stone pile center by drilling machine, injected hole runs through the both ends of broken stone pile,
And at least four circumferential direction injected hole is drilled out by drilling machine on broken stone pile peripheral ground is circumferential；
S9: slip casting: insertion Grouting Pipe is to bottom in center injected hole and circumferential injected hole, through Grouting Pipe respectively in
Heart injected hole and circumferential injected hole slip casting, using the grouting method of the uniform tube drawing in mud jacking, tube drawing should be according to grouting amount for slip casting
Based on being controlled, the spacing of each tube drawing is 0.5m, and uninterrupted slip casting, until aperture frost boiling specific gravity reaches injection mortar specific gravity
It, can a tube drawing when 95%.
The technical requirements of pore-creating and borehole cleaning:
1. vibrating impacter water spray center and aperture center deviation are not greater than 5cm when construction；
2. after vibroflotation pore-creating, pore-forming center and construction drawing centre of location deviation are not greater than 10cm；
3. stake top center and centre of location deviation are not greater than 0.25 times of stake holes diameter.
4. should keep vertical in vibrating impacter injection soil.
5. every 1 ~ 2m of the injection hole section of vibrating impacter, should record a pore-creating electric current, hydraulic pressure and time, until injection is advised to test
Fixed depth.
6. complete Kong Houying borehole cleaning 1 ~ 2 time.
The technical requirements of filler and encryption:
Filling method: using forced stuffing process.It, mainly will using the self weight of vibrating impacter and vibration force using forced filler
Hole top filler is sent to the lower part in hole.
Encryption carries out in the requsst listed below:
1. stake voltage processed is 380V, fluctuation is more than that ± 20V must not construct；
2. encrypting electric current 90A；
3. 10 ~ 12s of load time；
4. pore-creating 0.4 ~ 0.6MPa of hydraulic pressure encrypts 0.3 ~ 0.5MPa of hydraulic pressure；
5. encrypting 30 ~ 50cm of segment length.
6. using automatic electrical control system control encryption electric current and load time；
7. encrypting since bottom hole, paragraph by paragraph upwards, centre does not have leakage, is encrypted into earth's surface.
The prevention corrective action of vibroflotation construction specific aim quality assurance measure and common quality defect
Mainly there is quality controlling element in work progress: pile position deviation, construction depth, amount of filler, construction technical data and
Random inspection is carried out to pile body compactness and inter-pile soil cipher round results in the construction process.
Pile position deviation control:
Pile position deviation after making pile reaches code requirement, to control hole location offset in pore-creating first.Poration process
Middle generation hole location offset reason and correcting method are as follows:
1. soil property is uneven, deviated to the soft side of soil property when pore-creating.
Correcting method: can make vibrating impacter start pore-creating on one side to pan soil, and how much at the scene offset determines in construction, can also
Filler, which is poured into, in weak soil side prevents deflected file.
2. vibrating impacter conduit upper end drag link drawstring direction of pull or tightness is improper that vibrating impacter is caused to deviate.
Correcting method: adjustment drawstring direction and elasticity.
3. center line is not on vertical line or guiding-tube bend when vibrating impacter and conduit are installed.
Correcting method: the center line of adjustment vibrating impacter and conduit answers straightening or replacement to curved conduit on vertical line.
Lead to deflected file 4. constructing and squeezing vibrating impacter from side filler.
Correcting method: change condiment direction from the surrounding in hole and filler is added.
5. the pore-creating again of stake position should be found accurately when stake processed terminates to find that deflected file is more than specification or design requirement, encrypt
Pile.
Driving depth control:
1. it is measured using steel ruler after vibrating impacter and conduit group install and marks length mark in vibrating impacter and guide rod, one
As 0.5m be one section, so that operator is controlled vibrating impacter embedded depth accordingly.
2. should be appreciated that ground elevation situation of change, the depth for answering pore-creating is determined according to ground elevation.
3. vibrating impacter embedded depth will also adjust accordingly, in construction when ground occurs or siltation is raised with true
Protect into pile length.
Amount of filler control:
1. the quantity that is how many and being scattered in outside hole it is noted that each loading shovel charges.
2. checking the total amount into filler in the total amount of the filler of construction site and filling hole.
Construction technical data control:
Construction technical data has encryption electric current, load time, encryption segment length, pore-creating hydraulic pressure, encryption hydraulic pressure, filler number
Amount.
When using electric current is encrypted, load time, when encrypting segment length as overall target, filler quantity is referred to by above-mentioned these
Mark is constrained.
Construction technical data should be noted that following item when controlling:
1. using electrical automatic control equipment in construction to guarantee encryption electric current and load time accuracy.In vibrator bar
It is used under part, the encryption current value of setting, load time and encrypted section time may change, and should adjust in time；
2. ensuring to encrypt electric current, load time and encryption segment length in construction reaches requirement, a section otherwise cannot be terminated
Long encryption；
3. the no-load current of vibrating impacter has certain fluctuation for some reason, the control of no-load current is also in construction
The link that should be noted that.Therefore, record often should be measured to the no-load current of vibrating impacter in construction, when with it is conventional
When no-load current difference is larger, timely repair apparatus or appropriate adjustment is answered to encrypt electric current, to guarantee construction quality.
4. inspecting periodically electrical equipment, the prototype part of aging or failure is replaced in time.
Prevent the measure of holding card guide rod:
The stratum that this engineering vibroflotation construction is related in the construction process may there is a situation where holding card guide rods, it will influences
Construction efficiency and quality.It is incorporated in previous similar vibroflotation construction and has accumulated process experience abundant.Generally take following measures
It can ensure that vibroflotation pile is gone on smoothly.
1. the diameter for reducing guide rod and vibrating impacter junction is prominent using the large-diameter and high-strength guide rod voluntarily developed
Become, increase pore-creating equipment self-weight, enhances penetration capacity, the chance of layer of sand holding card guide rod can also be reduced.
2. should stop transferring vibrating impacter in time, allow vibrating impacter to rest on former depth, add when there is the sign of holding card guide rod
Big hydraulic pressure rushes a period of time in advance, then slowly transfers vibrating impacter, repeatedly lifts vibrating impacter borehole cleaning up and down near the location, prevents
Card hole, realization penetrate.
3. being embedded in hole when vibrating impacter blocks accidentally, when invalid using the above measure, usable large tonnage crane is held, starting
Vibrating impacter slowly above mentions, and a lot of startings are until propose；If cannot propose for the moment, motor operation can be suspended, continue water punching, cross one section
Time is promoted by above step again after barrier fetters the stress relieving of vibrating impacter and conduit；And when vibrating impacter motor damages
It is bad, when crane cannot propose, other vibrating impacters can be used and punched around it, or excavates certain depth with backhoe and reduce resistance,
It reuses backhoe or loading machine cooperation loading machine cooperation crane is promoted.
Guarantee the technical measures of pile crown compaction rate:
1. encrypted location should reach the above 1.0m of basis instrument elevation, to guarantee stake top compactness；
2., in aperture windrow thwack, vibrate repeatedly when encryption is close to stake top, be appropriately extended stake top portion load time and
Increase the number that vibrates.
In an embodiment of the present invention, in conjunction with test situation, there may be hard interbedded layer in construction, pore-creating electric current is more than
100A should be controlled, to avoid out to verify whether the layer is final supporting course by multiple put-on and delegated vibrating impacter
Now reach whole hole condition illusion, improve the depth that is effectively treated of pile body, guarantees construction quality.
In an embodiment of the present invention, in conjunction with test situation, when vibroflotation compaction is constructed, it is understood that there may be since soil property is weaker,
Encryption electric current is not easy to reach design value.It takes vibrating impacter to propose aperture, chases after material and be pressed onto soft layer, and the above process is repeated several times,
Increase the amount of filler of the construction section, reduce encryption segment length, guarantees pile body compactness.
The construction technology of grouting gravel pile is roughly divided into four pore-forming, lapidation, slip casting, pile parts, specifically constructs
Journey is as described below: drilling out center injected hole and circumferential injected hole respectively on the soil around broken stone pile and broken stone pile by drilling machine.
Lapidation guide pipe, Grouting Pipe, hole flushing pipe are placed after the completion of pore-forming in the injected hole of center.Later by being injected in hole flushing Guan Xiangkong
Clear water hole flushing flows out the specific gravity of slurries according to aperture, starts to put into aggregate into hole, and rubble is by hopper through lapidation guide pipe
It is thrown in hole, and fills out filling to aperture absolute altitude.Hole flushing is carried out while putting into building stones, prevents from colliding hole when investment building stones in this way
Collapse hole caused by wall (clear water of bottom hole injection can go out the soil of slump outside hole).Aggregate continues hole flushing after throwing completely, works as aperture
Outflow slurry specific gravity stops hole flushing after reaching certain requirement, begins through Grouting Pipe and injects the cement mortar being stirred into hole,
Slip casting using the uniform tube drawing in mud jacking grouting method, based on tube drawing should be controlled according to grouting amount, each tube drawing
Spacing is 0. 5m, and uninterrupted slip casting can a tube drawing when until aperture is bursted and become muddy when a thaw sets in, specific gravity reaches injection mortar specific gravity 95%.?
Grouting test is carried out first before extensive slip casting, with the suitable ratio of mud of determination and grouting pressure.To ensure grouting quality.?
Vibration during slip casting due to Grouting Pipe will cause the sinking of aperture building stones, therefore continuous feed supplement, slip casting are answered during slip casting
Stake top slurries can sink afterwards, should also carry out recharge operation.In the construction technology step of circumferential injected hole, by then for raising
Soil hardness around broken stone pile, therefore the step for eliminate lapidation.
To after the injected hole slip casting of center, slurries circumferentially permeate under Gravitative Loads, to stake, for soil of different nature
Layer, the penetration range of slurries are different.The factor for influencing slurry infiltration is mainly related with the porosity of the soil body.In general,
With the increase of soil cracking behavior, grouting amount and slurry flow are also bigger, and required grouting pressure is also smaller.
Circumferential injected hole gradually after, change the component of rubble pile peripheral earth, by the air in the soil body, moisture is replaced as
For cement-hydrate, fundamentally solves the intrusion of water, air.And slurry infiltration loosened to surrounding the soil body when, can be by it
Cementing is an entirety, greatly improves its whole compactness and effective stress, improves the property of pile peripheral earth,
Improve bearing capacity.On the other hand, slurries eliminate the influence of mudcake when permeating to stake side, so that pile body and soil around pile
Cementing power also enhances, to improve frictional force in side-pile, while stake produces effect of contraction to soil around pile, prevents soil around pile
Lateral deformation.
Claims (6)
1. a kind of construction technology for lower storage reservoir check dam vibro-replacement stone column, it is characterized in that: the technique includes the following steps:
S1: place cleaning powers on, water source；
S2: construction equipment is in place, lifts by crane vibrating impacter align piles position；
S3: pore-creating:
(a) vibrating impacter align piles position, first cracking pressure water pump restart vibrating impacter, wait shake after vibrating impacter outlet water at tail end mouth is sprayed water
Rush device normal operation and start pore-creating, make vibrating impacter blow slowly injection soil in, until design supporting course；
(b) vibrating impacter should be at overhang in poration process；There are rubber absorbers to be coupled between vibrating impacter and conduit, therefore leads
Pipe have it is slightly deflected be allowed, but deflection cannot be excessive, prevents vibrating impacter from deviateing injection direction；
S4: borehole cleaning: the mud returned out when pore-creating is thick or hole in have narrow or shrinkage cavity location that should carry out borehole cleaning；Borehole cleaning mentions vibrating impacter
Aperture or reaming location is being needed to lift vibrating impacter repeatedly up and down out, keeping aperture return of drilling mud thinning, is guaranteeing that vibroflotation hole is straight logical
Freely sunk with sharp filler；
S5: filler encryption: using forced filler stake technique；It continuously constructs, is encrypted since bottom hole when stake processed, paragraph by paragraph upwards,
Centre does not have leakage；After reaching the encryption electric current and load time of design code, vibrating impacter is above mentioned continue it is next
Duan Jiami, every section of encryption length Pass Test requirement；
S6: repeating step (5) work, from bottom to top, until being encrypted into design requirement stake top absolute altitude；
S7: closing vibrating impacter, Guan Shui, and stake processed terminates；
S8: it boring injected hole: drilling out center injected hole at broken stone pile center by drilling machine, injected hole runs through the both ends of broken stone pile, and
At least four circumferential direction injected hole is drilled out by drilling machine on broken stone pile peripheral ground is circumferential；
S9: slip casting: insertion Grouting Pipe is to bottom in the center injected hole and circumferential injected hole, through Grouting Pipe respectively in
Heart injected hole and circumferential injected hole slip casting, using the grouting method of the uniform tube drawing in mud jacking, tube drawing should be according to grouting amount for slip casting
Based on being controlled, the spacing of each tube drawing is 0.5m, and uninterrupted slip casting, until aperture frost boiling specific gravity reaches injection mortar specific gravity
It, can a tube drawing when 95%.
2. a kind of construction technology for lower storage reservoir check dam vibro-replacement stone column according to claim 1, it is characterized in that: making
The specific method of hole and borehole cleaning is, vibrating impacter water spray center and aperture center deviation are not greater than 5cm when construction；Vibroflotation pore-creating
Afterwards, pore-forming center and construction drawing centre of location deviation are not greater than 10cm；Stake top center and centre of location deviation are not greater than
0.25 times of stake holes diameter；It should keep vertical in vibrating impacter injection soil；Every 1 ~ 2m of the injection hole section of vibrating impacter, should record a pore-creating
Electric current, hydraulic pressure and time, until depth of the injection to test determination；Complete Kong Houying borehole cleaning 1 ~ 2 time.
3. a kind of construction technology for lower storage reservoir check dam vibro-replacement stone column according to claim 1, it is characterized in that: institute
Filling method is stated using forced stuffing process.
4. a kind of construction technology for lower storage reservoir check dam vibro-replacement stone column according to claim 1, it is characterized in that: institute
Stating encryption method is, stake voltage processed is 380V, and fluctuation is more than that ± 20V must not construct；Encrypt electric current 90A；10 ~ 12s of load time；
Pore-creating 0.4 ~ 0.6MPa of hydraulic pressure encrypts 0.3 ~ 0.5MPa of hydraulic pressure；Encrypt 30 ~ 50cm of segment length；Using automatic electrical control system
Control encryption electric current and load time；Encryption is since bottom hole, and paragraph by paragraph upwards, centre does not have leakage, is encrypted into earth's surface.
5. a kind of construction technology for lower storage reservoir check dam vibro-replacement stone column according to claim 1, it is characterized in that: note
Grouting test is carried out before slurry first, determines the ratio of mud and grouting pressure.
6. a kind of construction technology for lower storage reservoir check dam vibro-replacement stone column according to claim 1, it is characterized in that:
For continuous feed supplement during the injected hole slip casting of center, stake top slurry sinks after slip casting, carries out recharge.
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| CN108532585A (en) * | 2018-04-12 | 2018-09-14 | 桂林理工大学 | A kind of method for processing foundation of ancient collapse in karst region |
| CN111593725A (en) * | 2020-05-15 | 2020-08-28 | 北京市政建设集团有限责任公司 | Vibroflotation gravel pile and construction method thereof |
| CN116971362B (en) * | 2023-09-21 | 2023-12-12 | 北京恒祥宏业基础加固技术有限公司 | Building terrace reinforcing and lifting method on shallow gravel soil foundation |
| CN117702714A (en) * | 2024-02-05 | 2024-03-15 | 中科信德建设有限公司 | Reservoir dam structure stability monitoring method based on vibroflotation gravel pile treatment |
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| CN1100182C (en) * | 1999-06-22 | 2003-01-29 | 北京聚英达岩土技术开发有限责任公司 | Construction method of vibration punching slurry-bitstone pile and apparatus used thereof |
| CN203021994U (en) * | 2012-12-31 | 2013-06-26 | 中国建筑西南勘察设计研究院有限公司 | Gravel pile composite foundation with grouting steel pipe core |
| JP6225429B2 (en) * | 2013-02-04 | 2017-11-08 | 株式会社大林組 | Liquefaction prevention method |
| CN103590395A (en) * | 2013-11-27 | 2014-02-19 | 宁波盛宏建设工程有限公司 | Construction method of gravel grouting pile |
| CN105862708A (en) * | 2016-04-26 | 2016-08-17 | 北京振冲工程机械有限公司 | Down-the-hole hammer and guide hole matched construction method for vibro-replacement stone column composite foundation |
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2017
- 2017-06-24 CN CN201710489252.9A patent/CN107100160B/en active Active
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