CN107100160A - 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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- CN107100160A CN107100160A CN201710489252.9A CN201710489252A CN107100160A CN 107100160 A CN107100160 A CN 107100160A CN 201710489252 A CN201710489252 A CN 201710489252A CN 107100160 A CN107100160 A CN 107100160A
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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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- Agronomy & Crop Science (AREA)
- 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 technology for lower storage reservoir check dam vibro-replacement stone column, the technique opens up center injected hole and circumferential injected hole by rig 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, after solidification its overall compactness and effective stress are greatly improved, the property of pile peripheral earth is improved, bearing capacity is improved；On the other hand, slurries eliminate the influence of mudcake so that the cementing power of pile body and soil around pile also strengthens when being permeated to stake side, so as to improve frictional force in side-pile, while stake generates effect of contraction to soil around pile, prevent the lateral deformation of soil around pile.
Description
Technical field
It is more particularly to a kind of to be used for lower storage reservoir check dam vibro-replacement stone column the present invention relates to foundation engineering construction technique field
Construction technology.
Background technology
China strand, region is widely distributed along the river etc. the soft foundations such as marine clay, muck soil, wherein, some regions
Only soft base is distributed with shallow-layer；Though the soft base of some engineerings, compared with deep but project management model is small, required processing depth is also smaller.The class of the above two
The soft base of situation, rule of thumb, it is necessary to use certain treatment measures, can reach sedimentation and stability requirement.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
Stable safety.
At present, commonly use shallow layer foundation processing mode and mainly have cushion, it is compound foundation method, draining concretion method, light-weight foamed
Local method etc..Cushion has obvious effect to improving roadbed compactness, but smaller to reduction total settlement effect, and needs a large amount of
Outward transport is dug, energy-conserving and environment-protective theory is not met；The construction of light-weight foamed local method such as needs to foam, stirred a variety of machineries, constructing operation
Complexity, cost is even above cement mixing pile composite foundation method, and there are problems that anti-floating, therefore do not recommend shallow
Layer basement process is used；The half-rigidity piles composite foundation technique such as cement mixing pile is more ripe, but construction machinery is heavy, therefore does not push away
Recommend shallow layer foundation processing use；The rigid pile composite foundation such as prestressed concrete pipe pile, cast-in-situ bored pile effect is best, but cost
Height, does not recommend to be used for shallow layer foundation processing；Draining concretion method cost performance is high, but long in time limit, for the tight engineering of construction period not
It is applicable.
The content of the invention
It is an object of the invention to provide a kind of construction technology for lower storage reservoir check dam vibro-replacement stone column, stake is which improved
Zhou Tuti property, improves bearing capacity.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of construction technology for lower storage reservoir check dam vibro-replacement stone column, the technique comprises the following steps：
S1：Place cleaning, switches on power, water source；
S2：Construction equipment is in place, lifting vibrating impacter align piles position；
S3：Pore-creating：
（a）After vibrating impacter align piles position, first Opening pressure water pump, vibrating impacter outlet water at tail end mouthful water spray, restart vibrating impacter, wait to shake
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 lead
Pipe have it is slightly deflected be allowed, but deflection can not be excessive, prevents vibrating impacter from deviateing injection direction；
S4：Borehole cleaning：The mud returned out during pore-creating is thick or hole in there is narrow or shrinkage cavity location to carry out borehole cleaning；Borehole cleaning carries vibrating impacter
Go out aperture or needing reaming location to lift vibrating impacter repeatedly up and down, make aperture return of drilling mud thinning, it is ensured that vibroflotation hole is straight logical
Freely sunk with sharp filler；
S5：Filler is encrypted：Using the filler system of forcing stake technique；Continuously construct, encrypted since bottom hole during stake processed, paragraph by paragraph upwards,
Centre is without leakage；After the encryption electric current and load time of design code is reached, vibrating impacter is above carried proceed it is next
Duan Jiami, every section of encryption length Pass Test requirement；
S6：Repeat step (5) works, from bottom to top, until being encrypted into design requirement stake top absolute altitude；
S7：Vibrating impacter is closed, Guan Shui, stake processed terminates；
S8：Bore injected hole：Center injected hole is got out at broken stone pile center by rig, and injected hole runs through the two ends of broken stone pile, and
The circumferential injected hole of at least four is got out by rig 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, by Grouting Pipe respectively in
Heart injected hole and circumferential injected hole slip casting, slip casting is using the grouting method of the uniform tube drawing in mud jacking, and tube drawing should be according to grouting amount
Based on being controlled, the spacing of each tube drawing is 0.5m, and uninterrupted slip casting, and injection mortar proportion is reached to aperture frost boiling proportion
, can a tube drawing when 95%.
By using above-mentioned technical proposal, cement mortar 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 mortar, makes the sand around broken stone pile be hardened, and improves the side-friction force of broken stone pile, further reduces 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 during construction
5cm must be more than；After vibroflotation pore-creating, pore-forming center and construction drawing centre of location deviation cannot be greater than 10cm；Stake top center is with determining
Position centre deviation cannot be greater than 0.25 times of stake holes diameter；It should keep vertical in vibrating impacter injection soil；Vibrating impacter is per 1 ~ 2m of injection
Hole section, should record pore-creating electric current, hydraulic pressure and time, until depth of the injection to test determination；Complete Kong Houying borehole cleanings 1 ~ 2
Time.
Further, the filling method uses and forces stuffing process.
By using above-mentioned technical proposal, using filler is forced, mainly use vibrating impacter deadweight and vibration force by hole
Top filler is sent to the bottom in hole.
Further, the encryption method is that stake voltage processed is 380V, and fluctuation, which exceedes ± 20V, to construct；Encrypt electric current
90A；10 ~ 12s of load time；Pore-creating 0.4 ~ 0.6MPa of hydraulic pressure, 0.3 ~ 0.5MPa of encryption hydraulic pressure；Encrypt 30 ~ 50cm of segment length；Should
With automatic electrical control system control encryption electric current and load time；Encryption is since bottom hole, paragraph by paragraph upwards, and centre is not leaked
Shake, be encrypted into earth's surface.
Further, grouting test is carried out before slip casting first, the ratio of mud and grouting pressure is determined.
By using such scheme, to determine the suitable ratio of mud and grouting pressure, it is ensured that grouting quality.
Further, the continuous feed supplement during injected hole slip casting centered on, stake top slurry sinks after slip casting, carries out recharge.
Raised difficult questions by using above-mentioned technology, because the vibration due to Grouting Pipe during to slip casting can cause aperture stone
Material sinks, therefore answers stake top slurries after continuous feed supplement, slip casting to sink during slip casting, should also carry out recharge operation.
In summary, the invention has the advantages that：, can be cementing by its during the soil body that slurry infiltration loosens to surrounding
For an entirety, after solidification its overall compactness and effective stress are greatly improved, improve the property of pile peripheral earth, improve
Bearing capacity；On the other hand, slurries eliminate the influence of mudcake when being permeated to stake side so that pile body and soil around pile it is cementing
Ability also strengthens, so as to improve frictional force in side-pile, while stake generates effect of contraction to soil around pile, prevents the side of soil around pile
To deformation.
Brief description of the drawings
Fig. 1 is the process chart of invention.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
This specific embodiment is only explanation of the invention, and it is not limitation of the present invention, people in the art
Member can make the modification without creative contribution to the present embodiment as needed after this specification is read, but as long as at this
All protected in the protection domain of invention by Patent Law.
A kind of construction technology for lower storage reservoir check dam vibro-replacement stone column, technique comprises the following steps：
S1：Place cleaning, switches on power, water source；
S2：Construction equipment is in place, lifting vibrating impacter align piles position；
S3：Pore-creating：
（a）After vibrating impacter align piles position, first Opening pressure water pump, vibrating impacter outlet water at tail end mouthful water spray, restart vibrating impacter, wait to shake
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 lead
Pipe have it is slightly deflected be allowed, but deflection can not be excessive, prevents vibrating impacter from deviateing injection direction；
S4：Borehole cleaning：The mud returned out during pore-creating is thick or hole in there is narrow or shrinkage cavity location to carry out borehole cleaning；Borehole cleaning carries vibrating impacter
Go out aperture or needing reaming location to lift vibrating impacter repeatedly up and down, make aperture return of drilling mud thinning, it is ensured that vibroflotation hole is straight logical
Freely sunk with sharp filler；
S5：Filler is encrypted：Using the filler system of forcing stake technique；Continuously construct, encrypted since bottom hole during stake processed, paragraph by paragraph upwards,
Centre is without leakage；After the encryption electric current and load time of design code is reached, vibrating impacter is above carried proceed it is next
Duan Jiami, every section of encryption length Pass Test requirement；
S6：Repeat step (5) works, from bottom to top, until being encrypted into design requirement stake top absolute altitude；
S7：Vibrating impacter is closed, Guan Shui, stake processed terminates；
S8：Bore injected hole：Center injected hole is got out at broken stone pile center by rig, and injected hole runs through the two ends of broken stone pile, and
The circumferential injected hole of at least four is got out by rig on broken stone pile peripheral ground is circumferential；
S9:Slip casting：Insertion Grouting Pipe is noted to center respectively to bottom by Grouting Pipe in center injected hole and circumferential injected hole
Hole and circumferential injected hole slip casting are starched, slip casting uses the grouting method of the uniform tube drawing in mud jacking, and tube drawing should be carried out according to grouting amount
Based on control, the spacing of each tube drawing is 0.5m, and uninterrupted slip casting, and injection mortar proportion 95% is reached to aperture frost boiling proportion
When, can a tube drawing.
Pore-creating and the technical requirements of borehole cleaning：
Vibrating impacter water spray center and aperture center deviation cannot be greater than 5cm when 1. constructing；
2. after vibroflotation pore-creating, pore-forming center and construction drawing centre of location deviation cannot be greater than 10cm；
3. stake top center and centre of location deviation cannot be greater than 0.25 times of stake holes diameter.
4. it should keep vertical in vibrating impacter injection soil.
5. vibrating impacter is per injection 1 ~ 2m hole sections, should record pore-creating electric current, hydraulic pressure and time, until injection is to experiment rule
Fixed depth.
6. complete Kong Houying borehole cleanings 1 ~ 2 time.
Filler and the technical requirements of encryption：
Filling method：Using forcing stuffing process.Using filler is forced, mainly use vibrating impacter deadweight and vibration force by hole
Portion's filler is sent to the bottom in hole.
Encryption is carried out in the requsst listed below：
1. stake voltage processed is 380V, and fluctuation, which exceedes ± 20V, to construct；
2. electric current 90A is encrypted；
3. 10 ~ 12s of load time；
4. 0.4 ~ 0.6MPa of pore-creating hydraulic pressure, encrypts 0.3 ~ 0.5MPa of hydraulic pressure；
5. 30 ~ 50cm of segment length is encrypted.
6. electric current and load time are encrypted in the control of application automatic electrical control system；
7. encrypt since bottom hole, paragraph by paragraph upwards, centre is encrypted into earth's surface without leakage.
The prevention corrective action of vibroflotation construction specific aim quality assurance measure and common quality defect
Mainly there be quality control key element in work progress：Pile position deviation, construction depth, amount of filler, construction technical data and applying
Pile body compactness and inter-pile soil cipher round results are inspected by random samples at random during work.
Pile position deviation is controlled：
The pile position deviation after pile is reached code requirement, to control hole position to offset in pore-creating first.Sent out in poration process
Raw hole position skew reason and correcting method are as follows：
1. soil property is uneven, is offset during pore-creating to the soft side of soil property.
Correcting method：Vibrating impacter can be made to pan soil while starting pore-creating, offset is determined in how much constructing at the scene, also may be used
Filler is poured into weak soil side and prevents deflected file.
2. vibrating impacter conduit upper end drag link drawstring direction of pull or tightness is improper causes vibrating impacter to offset.
Correcting method：Adjust 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 replacing on vertical line to the conduit of bending.
4. construct causes deflected file from side filler extruding vibrating impacter.
Correcting method：Change condiment direction and add filler from the surrounding in hole.
5. when stake processed terminates to find that deflected file exceedes specification or design requirement, stake position pore-creating again, encryption should be found accurately
Pile.
Driving depth control：
1. after vibrating impacter and conduit have been assembled, measured using steel ruler and mark length mark in vibrating impacter and guide rod, typically
0.5m is one section, operating personnel is controlled vibrating impacter embedded depth accordingly.
2. ground elevation situation of change is should be appreciated that, determines to answer the depth of pore-creating according to ground elevation.
3. in constructing when ground occurs or alluvial is raised, vibrating impacter embedded depth will also be adjusted accordingly, with true
Protect into pile length.
Amount of filler is controlled：
1. it is noted that loading shovel charging is how many every time and the quantity that is scattered in outside hole.
2. the total amount and the total amount for inserting filler in hole into the filler of construction site to be checked.
Construction technical data is controlled：
Construction technical data has encryption electric current, load time, encryption segment length, pore-creating hydraulic pressure, encryption hydraulic pressure, filler quantity.
Electric current is encrypted when using, load time, when encryption segment length is 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. to ensure encryption electric current and load time accuracy, electrical automatic control equipment is used in construction.Under vibrating conditions
Use, the encryption current value of setting, load time and encrypted section time may change, and should adjust in time；
2. ensure that encryption electric current, load time and encryption segment length reach requirement in constructing, otherwise can not terminate segment length's
Encryption；
3. the no-load current of vibrating impacter has certain fluctuation for some reason, and the control of no-load current is also that should be noted in constructing
One link of meaning.Therefore, record often should be measured to the no-load current of vibrating impacter in construction, when the zero load with routine
When electric current difference is larger, timely repair apparatus or appropriate adjustment encryption electric current are answered, to ensure construction quality.
4. electrical equipment is inspected periodically, the prototype part of aging or failure is changed in time.
Prevent the measure of holding card guide rod：
The situation of holding card guide rod may occur in work progress for the stratum that this engineering vibroflotation construction is related to, it will influence construction
Work efficiency and quality.Abundant process experience is have accumulated with reference in conventional similar vibroflotation construction.Typically take following measures true
Vibroflotation pile is protected to be smoothed out.
1. using the large-diameter and high-strength guide rod voluntarily developed, reduce guide rod and the diameter of vibrating impacter junction is dashed forward
Become, increase pore-creating equipment self-weight, strengthen penetration capacity, can also reduce the chance of layer of sand holding card guide rod.
2. when there is the sign of holding card guide rod, it should in time stop transferring vibrating impacter, allow vibrating impacter to rest on former depth, plus
Big hydraulic pressure rushes a period of time in advance, then slow decentralization vibrating impacter, and multiple lifting vibrating impacter borehole cleaning up and down, is prevented near the location
Hole clipping, realization is penetrated.
3. be embedded in when vibrating impacter blocks accidentally in hole, using above measure it is invalid when, usable large tonnage crane is held, start
Vibrating impacter is slowly above carried, a lot of to start until proposing；If can not propose for the moment, motor operation can be suspended, continue water punching, cross one section
Time is promoted by above step again after after the stress relieving that barrier fetters vibrating impacter and conduit；And when vibrating impacter motor is damaged
It is bad, when crane can not be proposed, it can be punched using other vibrating impacters around it, or certain depth reduction resistance is excavated with backhoe,
Reuse backhoe or loading machine coordinates loading machine to coordinate crane to promote.
Ensure the technical measures of pile crown compaction rate：
1. encrypted location should reach basis instrument elevation above 1.0m, to ensure stake top compactness；
2. when encryption is close to stake top, in aperture windrow thwack, vibrate repeatedly, the load time in proper extension stake top portion and increase
Vibrate number of times.
In an embodiment of the present invention, binding tests situation, there may be hard interbedded layer in construction, and pore-creating electric current exceedes
100A, to verify whether the layer is final supporting course, should be controlled, so as to avoid out by multiple put-on and delegated vibrating impacter
Whole hole condition illusion is now reached, effective processing depth of pile body is improved, it is ensured that construction quality.
In an embodiment of the present invention, binding tests situation, when vibroflotation compaction is constructed, it is understood that there may be because soil property is weaker,
Encryption electric current is difficult to reach design load.Take vibrating impacter to propose aperture, chase after material and be pressed onto soft layer, and be repeated several times said process,
Increase the amount of filler of the construction section, reduce encryption segment length, it is ensured that pile body compactness.
The construction technology of grouting gravel pile is roughly divided into pore-forming, lapidation, slip casting, four parts of pile, specifically constructs
Journey is as described below:Center injected hole and circumferential injected hole are got out respectively on the soil around broken stone pile and broken stone pile by rig.
Lapidation guide pipe, Grouting Pipe, hole flushing pipe are placed after the completion of pore-forming in the injected hole of center.Afterwards by being injected in hole flushing Guan Xiangkong
Clear water hole flushing, the proportion of slurries is flowed out according to aperture, starts to put into aggregate into hole, 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 input building stones, so prevents from colliding hole during input building stones
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 the cement mortar being stirred is injected 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 reaching injection mortar proportion 95% to aperture frost boiling proportion.
Grouting test is carried out first before extensive slip casting, to determine the suitable ratio of mud and grouting pressure.To ensure grouting quality.
Because the vibration of Grouting Pipe can cause aperture building stones sinking during slip casting, 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, for soil of different nature under Gravitative Loads to stake
Layer, the penetration range of slurries is different.Influence the factor of slurry infiltration mainly relevant with the porosity of the soil body.In general,
With the increase of soil cracking behavior, grouting amount and slurry flow are also also smaller than larger, required grouting pressure.
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, the intrusion of water, air is fundamentally solved.And slurry infiltration loosened to surrounding the soil body when, can be by it
Cementing is an entirety, after solidification its overall compactness and effective stress is greatly improved, improves the property of pile peripheral earth,
Improve bearing capacity.On the other hand, slurries eliminate the influence of mudcake when being permeated to stake side so that pile body and soil around pile
Cementing power also strengthens, so as to improve frictional force in side-pile, while stake generates 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 comprises the following steps：
S1：Place cleaning, switches on power, water source；
S2：Construction equipment is in place, lifting vibrating impacter align piles position；
S3：Pore-creating：
（a）After vibrating impacter align piles position, first Opening pressure water pump, vibrating impacter outlet water at tail end mouthful water spray, restart vibrating impacter, wait to shake
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 lead
Pipe have it is slightly deflected be allowed, but deflection can not be excessive, prevents vibrating impacter from deviateing injection direction；
S4：Borehole cleaning：The mud returned out during pore-creating is thick or hole in there is narrow or shrinkage cavity location to carry out borehole cleaning；Borehole cleaning carries vibrating impacter
Go out aperture or needing reaming location to lift vibrating impacter repeatedly up and down, make aperture return of drilling mud thinning, it is ensured that vibroflotation hole is straight logical
Freely sunk with sharp filler；
S5：Filler is encrypted：Using the filler system of forcing stake technique；Continuously construct, encrypted since bottom hole during stake processed, paragraph by paragraph upwards,
Centre is without leakage；After the encryption electric current and load time of design code is reached, vibrating impacter is above carried proceed it is next
Duan Jiami, every section of encryption length Pass Test requirement；
S6：Repeat step (5) works, from bottom to top, until being encrypted into design requirement stake top absolute altitude；
S7：Vibrating impacter is closed, Guan Shui, stake processed terminates；
S8：Bore injected hole：Center injected hole is got out at broken stone pile center by rig, and injected hole runs through the two ends of broken stone pile, and
The circumferential injected hole of at least four is got out by rig 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, by Grouting Pipe respectively in
Heart injected hole and circumferential injected hole slip casting, slip casting is using the grouting method of the uniform tube drawing in mud jacking, and tube drawing should be according to grouting amount
Based on being controlled, the spacing of each tube drawing is 0.5m, and uninterrupted slip casting, and injection mortar proportion is reached to aperture frost boiling proportion
, 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：Make
The specific method of hole and borehole cleaning is that vibrating impacter water spray center and aperture center deviation cannot be greater than 5cm during construction；Vibroflotation pore-creating
Afterwards, pore-forming center and construction drawing centre of location deviation cannot be greater than 10cm；Stake top center and centre of location deviation cannot be greater than
0.25 times of stake holes diameter；It should keep vertical in vibrating impacter injection soil；Vibrating impacter should record a pore-creating per injection 1 ~ 2m hole sections
Electric current, hydraulic pressure and time, until depth of the injection to test determination；Complete Kong Houying borehole cleanings 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
State filling method use and force 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, which exceedes ± 20V, to construct；Encrypt electric current 90A；10 ~ 12s of load time；
Pore-creating 0.4 ~ 0.6MPa of hydraulic pressure, 0.3 ~ 0.5MPa of encryption 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, paragraph by paragraph upwards, and centre is encrypted into earth's surface without leakage.
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 first before slurry, 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：
Centered on constantly feed supplement during injected hole slip casting, stake top slurry sinks after slip casting, carries out recharge.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN116971362A (en) * | 2023-09-21 | 2023-10-31 | 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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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN116971362A (en) * | 2023-09-21 | 2023-10-31 | 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 |
| 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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