CN108239972A - A kind of construction technology of deep soft soil treatment - Google Patents
A kind of construction technology of deep soft soil treatment Download PDFInfo
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- CN108239972A CN108239972A CN201711330615.0A CN201711330615A CN108239972A CN 108239972 A CN108239972 A CN 108239972A CN 201711330615 A CN201711330615 A CN 201711330615A CN 108239972 A CN108239972 A CN 108239972A
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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
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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
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of construction technologies of deep soft soil treatment, include the following steps：Preparation of construction, levelling of the land；It is laid with sand bedding course and sets vertical drainage device；Vacuum tube screen cloth is set, including horizontal tube, VERTICAL TUBE；Diaphragm seal is laid with；Sealing ditch is dug along precompressed zone surrounding outer rim；Start vacuum pump；Mudjack is installed after the completion and is connected to VERTICAL TUBE, grouting liquid is prepared and carries out cementing operations；VERTICAL TUBE is extracted upwards several times during cementing operations, continues cementing operations after being lifted up every time, until completing the processing to deep soft foundation.VERTICAL TUBE has good gas permeability and its outer surface is enclosed with filtration material, and one end that VERTICAL TUBE is in the soil body is additionally provided with grout outlet.The present invention is combined using affixed drainage and preloading and first of processing is carried out to deep soft foundation, requirement is basically reached, then follow-up reinforcement is carried out by cementing operations, so that ground increases substantially bearing capacity, integral rigidity is also met the requirements, and reduces settlement after construction.
Description
Technical field
The present invention relates to field of foundation treatment, more particularly to a kind of construction technology of deep soft soil treatment.
Background technology
The relationship of ground and building is extremely close, the safety and normal use of building, and foundation plays quite heavy
The effect wanted.Generally will cannot often meet building is known as soft foundation to the subsoil of foundation requirement, generally, generally
There are the problem of have：Foundation bearing capacity is inadequate, failure by shear is easily generated under upper load effect, sedimentation uneven causes to build
It builds that object tilts or drawing crack, seepage flow under foundation are exceeded, generates latent erosion or piping, influence building stability.Therefore, for above-mentioned several depths
Thick soft base is required to the processing work being in time.
Application publication number is to disclose a kind of construction of deep soft soil treatment in the Chinese patent document of CN106677157A
Technique carries out deep layer pretreatment, then carry out secondary shallow layer reinforcement processing using cement mixing pile by plastic draining board, promotes ground
The bearing capacity of base entirety and the intensity of cement mixing stake body.
But plastic draining board can inevitably encounter well inhibition effect when handling deep foundation base, i.e. the more modeling of depths
Expecting the drain function of drain bar reduces more, and the depth for often leading to basement process is limited, and settlement after construction is larger and secondary consolidation
Time is long, is unfavorable for the stabilization of ground.Meanwhile the setting of cement mixing pile is also merely able to reach on the whole the soil layer of shallow-layer
Surface layer load is transferred in deep soil by bearing power increase, but there is no have significant carrying in itself to shallow-layer soil layer
The castering action of ability, the soil layer of shallow-layer still in soft and squeezable state, be easy to cause after work generate secondary consolidation and
Sedimentation.
Invention content
The object of the present invention is to provide a kind of construction technologies of deep soft soil treatment, have the bearing capacity for strengthening deep subgrade
Effect.
The present invention above-mentioned technical purpose technical scheme is that：A kind of deep soft soil treatment is applied
Work technique, includes the following steps：
S1, preparation of construction, the site clearing in pending precompressed zone is smooth；
Sand bedding course is laid on S2, the place after S1 is smooth and vertical drainage device is set into the soil body, in the soil of precompressed zone
The evenly spaced drainage channel of multiple tracks is formed in vivo；
S3, vacuum tube screen cloth are set, and horizontal tube, VERTICAL TUBE including being used for gas bleeding and partial moisture, VERTICAL TUBE are communicated in water
Flat pipe, horizontal tube are connected with vacuum pump, and horizontal tube is embedded in sand bedding course, and VERTICAL TUBE is embedded in by S2 treated the soil bodys
In；
S4, diaphragm seal are laid with, and multi-layer sealed film is equipped with, and diaphragm seal fitting is connect in S3 treated soil body upper surface place Min layers
In on the soil body；
S5, sealing ditch are dug, and dig sealing ditch along precompressed zone surrounding outer rim, four film sides of diaphragm seal are embedded in sealing ditch
In, form the sealing cover body that five faces are sealing；
S6, start vacuum pump, vacuum preconsolidation operation is carried out to the soil body by S5 processing；
S7, after completing the processing of S6, vacuum pump and horizontal tube are removed, installation mudjack is simultaneously connected to the VERTICAL TUBE in S3, prepares
Grouting liquid simultaneously passes through VERTICAL TUBE and carries out cementing operations；
When S8, cementing operations such as in S7, VERTICAL TUBE is extracted upwards several times, and continues grouting after being lifted up every time and makees
Industry, until VERTICAL TUBE extracts the soil body completely, sealing of hole completes the processing to deep soft foundation；
VERTICAL TUBE has good gas permeability and its outer surface is enclosed with filtration material, and one end that VERTICAL TUBE is in the soil body is also set
There is the grout outlet for grouting liquid outflow.
By using above-mentioned technical proposal, vacuum preloading discharging consolidation is brighter for the processing function and effect of deep soft foundation
It is aobvious, basic significantly intensity, therefore sealing requirements therein are most important can be promoted, and be equipped in said program more
Layer diaphragm seal and the form that four sides of film are embedded in in sealing ditch and used water seal, meet whole seal request.
When being set again by vacuum tube screen cloth, VERTICAL TUBE is embedded in basic earth, during convenient for vacuum pump work, Neng Gougeng
Add direct and uniformly extract the air-flow in basic earth to be reinforced or moisture out, form more uniform subnormal ambient, just
The mutual affixed contraction between the soil body.
After the completion of vacuum method processing, further grouting and piling prepressing are additionally provided with to the soil body of deep soft foundation,
Moreover, the grout pipe used during grouting is both the cost for saving material, can also reduce to foundation soil directly using VERTICAL TUBE
The disturbance of body is conducive to the stability of ground entirety, and the channel that leaves of when VERTICAL TUBE detaches and unconsolidated crack also can
Enough fill grouting liquid, the support system inside foundation soil body can be formed, again improve the carrying of deep subgrade in itself
Power and shearing strength.
The further setting of the present invention is：Promotion part is slidably connected at the grout outlet of VERTICAL TUBE in S3, promotion part is in
Downwardly projecting taper is set, and the connection external sliding groove set in end is additionally provided on the inner wall at grout outlet, promotion part is slided
It is connected in sliding groove, when VERTICAL TUBE drives promotion part downward, promotion part is connected on sliding groove roof and same with VERTICAL TUBE
Step movement, when VERTICAL TUBE is lifted up, promotion part is detached from along sliding groove and VERTICAL TUBE.
By using above-mentioned technical proposal, when VERTICAL TUBE squeezes into downwards the soil body, by the setting of promotion part cone, more
It is convenient to enter in the soil body of deep layer, and on the other hand, when being lifted up VERTICAL TUBE, promotion part is then detached from it, so as to this
When VERTICAL TUBE bottom end grout outlet open, can be used for grouting liquid is perfused.
The further setting of the present invention is：Check valve is additionally provided in VERTICAL TUBE, grouting liquid can be moved downward by check valve.
By using above-mentioned technical proposal, check valve is equipped with the unidirectional outlet to flow downward for grouting liquid, grouting liquid
From up to down into check valve inner cavity in when, due to squeezing action so that check valve open, so as to grouting liquid can to flow down
It drops down, and when cementing operations terminate it will cause grouting liquid reflux, check valve can be extruded into closed state again at this time, will not generate
The situation of reflux facilitates being normally carried out for cementing operations.
The further setting of the present invention is：Horizontal tube is with leachy PVC pipeline, is wrapped with filtration material, water outside
The end point of flat pipe is set for closing.
By using above-mentioned technical proposal, horizontal tube is embedded in sand bedding course, is wrapped with one layer of filtration material, can effectively be prevented
Only the impurity such as sand or soil enter in horizontal tube, broken end Seal treatment so that vacuum degree effect degree everywhere can be protected
It holds uniformly, convenient for whole draining and consolidation.
The further setting of the present invention is：By being also embedded with to detect inside soil body air pressure in S3 treated the soil bodys
The measuring instrument device of intensity.
By using above-mentioned technical proposal, measuring instrument device is buried to design position, it is main convenient in the detection soil body in real time
Vacuum degree etc., it will be appreciated that the concrete condition of negative pressure of vacuum can also carry out the adjustment of vacuum pressure according to the degree of consolidation.
The further setting of the present invention is：Sand bedding course thickness in S2 is 50-80cm, using the medium coarse sand of clay content≤3%
It is laid with, and sand bedding course point is laid with for two layers up and down, and TGXG is also equipped between two layers.
By using above-mentioned technical proposal, being provided with TGXG has the function of to separate and fix sand, and using containing mud
Measure few medium coarse sand, it is easier to moisture or gas be allowed to discharge.
The further setting of the present invention is：Drainage arrangement uses plastic draining belt, and is arranged with outside plastic draining belt anti-
Filter material material, spacing is 0.8-1.5m between each two plastic draining belt.
By using above-mentioned technical proposal, filtration material is provided with, can be good at protecting plastic draining belt, it will not be by
The influence of the impurity such as the soil squeezed from lateral soil pressure.
The further setting of the present invention is：Diaphragm seal in S4 is using the special geomembrane of polyvinyl chloride, thickness 0.12-
0.14mm, and diaphragm seal is equipped with to protect its complete seepage of water geotextiles up and down.
By using above-mentioned technical proposal, the integrality and leakproofness of diaphragm seal are very for the operation of vacuum preloading
Important one, it is therefore necessary to ensure the certified products of enough thickness, diaphragm seal should be equipped with seepage of water geotextiles up and down, from
And the proper flow of moisture and gas will not be both hindered, it can also play the role of protecting diaphragm seal completely.
The further setting of the present invention is：Sealing trench depth in S5 is 2-3m, and the film side of diaphragm seal is along sealing ditch
For inner wall vertically into ditch body and being laid on the bottom of trench of sealing ditch, bottom of trench tiling, which has, also uses clay in the sealing ditch of diaphragm seal
Or mud is backfilled to 1/2 height of ditch body and locates, and carries out covering water process after the completion of backfill again and is filled up to that will seal ditch.
By using above-mentioned technical proposal, the periphery of diaphragm seal is embedded in the inside of sealing ditch, is laid in ditch bottom
Afterwards, then using clay or mud bear down on one to cover, in order to further ensure leakproofness, also cover water process at sealing ditch, reach
To the effect of water seal.
The further setting of the present invention is：By S8, treated that soil body upper surface also heap is loaded with precompressed carrier, pre- ballast
Body is more than or equal to building to the load that the soil body applies.
By using above-mentioned technical proposal, after vacuum preloading and the operation being in the milk, the integrated carrying of deep soft foundation
Ability and shearing resistance can greatly can be improved, and simultaneously again by the method for piling prepressing, it can be by superficial layer
The further compression concretion of the soil body, reduce settlement after construction.
In conclusion the invention has the advantages that：
1st, effectively enhance bearing capacity, the shear resistance of deep soft foundation, disclosure satisfy that the requirement of upper load, sink after reducing work
Drop；
2nd, by vacuum pipe network, arrangement is and secondary for cementing operations to inside soil body vertically, that is, improve vacuum preloading effect,
Material is saved, construction has been also convenient for, has shortened the construction period.
Description of the drawings
Fig. 1 is the structure diagram of VERTICAL TUBE and promotion part in embodiment one.
In figure：1st, VERTICAL TUBE；2nd, grout outlet；3rd, promotion part；4th, sliding groove；5th, sliding shoe.
Specific embodiment
The present invention is described in further detail below in conjunction with attached drawing.
Specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
The modification of no creative contribution can be made to the present embodiment as needed after this specification is read, but as long as in this hair
It is all protected in bright right by Patent Law.
Embodiment one：A kind of construction technology of deep soft soil treatment, includes the following steps：
S1, preparation of construction, the site clearing in pending precompressed zone is smooth.
Sand bedding course is laid on S2, the place after S1 is smooth and plastic draining board is set into the soil body, in precompressed zone
The evenly spaced drainage channel of multiple tracks is formed in the soil body.
One layer of non-woven geotextile is first laid with before being laid with sand bedding course, for sand to be isolated with soil.Sand in sand bedding course, which uses, to be contained
The medium coarse sand of mud amount≤3%, and the thickness being laid with is 60cm, is laid with time-division upper and lower two layers of laying, lower floor is laid with soil after the completion of being laid with
Work grid, the sand in sand bedding course is fixed as possible, then start to squeeze into plastic draining board, every two pieces of modelings into the soil body with sheeting machine
The spacing between drain bar is expected for 1m, and plastic draining board is being laid with upper strata sand bedding course until absolute altitude after installation is complete.
S3, vacuum tube screen cloth are set, and horizontal tube, VERTICAL TUBE 1 including being used for gas bleeding and partial moisture, VERTICAL TUBE 1 connect
Horizontal tube is passed through, horizontal tube is connected with vacuum pump, and horizontal tube is embedded in sand bedding course, and VERTICAL TUBE 1 is embedded in after S2 is handled
The soil body in, while the measuring instrument device for detecting inside soil body air pressure level is also embedded in the soil body.
VERTICAL TUBE 1 has good gas permeability and its outer surface is enclosed with the geotextiles of anti-filter, and VERTICAL TUBE 1 is in the soil body
One end be additionally provided with the grout outlet 2 flowed out for grouting liquid.Promotion part 3 is slidably connected at grout outlet 2, grout outlet 2 is in promotion part 3
Junction offer sliding groove 4 of the twice along 1 length direction of VERTICAL TUBE, sliding groove 4 connects close to one end of promotion part 3 for opening
Logical extraneous setting, promotion part 3 are set for downward projection of cone, and both sides are provided with sliding shoe 5, and sliding shoe 5 is slided and connected
It is connected in sliding groove 4.
When VERTICAL TUBE 1 drives promotion part 3 downward, promotion part 3 is connected on 4 roof of sliding groove and fortune synchronous with VERTICAL TUBE 1
Dynamic, when VERTICAL TUBE 1 is lifted up, promotion part 3 is detached from along sliding groove 4 and VERTICAL TUBE 1.Promotion part 3 in VERTICAL TUBE 1 disengaging after,
VERTICAL TUBE 1 can be used as grout pipe use.
Meanwhile in order to smooth cementing operations, check valve is additionally provided in VERTICAL TUBE 1, grouting liquid can pass through check valve
It moves downward and reaches in the soil body, but since the non-return of check valve acts on, can effectively organize the reflux of grouting liquid, reach and fill
Divide the effect of grouting.
And horizontal tube is embedded in sand bedding course and is connected with vacuum pump, therefore is used with leachy pvc pipe, outside
Being wrapped with non-woven geotextile prevents soil and sand from entering inside, and sealing blocking processing is also done in end, to meet wanting for vacuum pump pumping
It asks.
S4, diaphragm seal are laid with, and multi-layer sealed film is equipped with, and use weight pressure in S3 treated soil body upper surface place Min layers
Thereon so that sealing surface is fitted on the soil body.Sealing surface use the special geomembrane of polyvinyl chloride, thickness 0.12-0.14mm,
And diaphragm seal is equipped with up and down for protecting its complete seepage of water geotextiles, so that diaphragm seal can be good at realizing
The sealing function of itself.
S5, sealing ditch are dug, and sealing ditch is dug along precompressed zone surrounding outer rim, and sealing trench depth is 2-3m, the film of diaphragm seal
Side along it is described sealing ditch inner wall vertically into ditch body and be laid in sealing ditch bottom of trench on, bottom of trench tiling have diaphragm seal
It is also backfilled at 1/2 height of ditch body using clay or mud in sealing ditch, carries out covering water process again after the completion of backfill until will
Sealing ditch is filled, and forms a water seal band of surrounding connection so that diaphragm seal is for the pending precompressed zone soil body as possible close
It seals.
S6, start vacuum pump, vacuum preconsolidation operation is carried out to the soil body by S5 processing, passes through pre-buried measuring instrument
The real time reaction of device, whether the suction strength observed in the soil body reaches desired value, if there is abnormal place's timely processing, without not
Normal condition can enter the voltage stabilizing phase when occurring, vacuum pump takes air and moisture out of, and process continues 3-4 regarding concrete engineering situation
Month duration, after reaching expected duration and consolidation strength, you can termination of pumping.
S7, after completing the processing of S6, vacuum pump and horizontal tube is removed, exposes VERTICAL TUBE 1 in the interface position of horizontal tube, peace
Dress mudjack and the interface for being connected to VERTICAL TUBE 1 prepare grouting liquid and pass through the progress cementing operations of VERTICAL TUBE 1.
VERTICAL TUBE 1 is extracted upwards several times when S8, cementing operations, and continues cementing operations after being lifted up every time,
Until VERTICAL TUBE 1 extracts the soil body completely so that grouting liquid can be filled into the soil body of different depth, not only by VERTICAL TUBE 1
Through-hole is closed, and can also be connected with more gaps, forms an interconnected grouting network.After completing cementing operations, erect
Sealing of hole operation is carried out after the whole extraction of straight tube 1, the duct of grouting is blocked, completes the processing to deep soft foundation.
Embodiment two：A kind of construction technology of deep soft soil treatment, with embodiment one difference lies in：By cementing operations
Afterwards, piling prepressing operation is carried out also on the upper surface of the soil body, by loading more than or equal to the design load of upper building
Pre- ballast carrier, time of precompressed are set as 1-2 months according to concrete engineering situation, due to piling prepressing mainly for further plus
The consolidation strength and shearing strength of the strong shallow-layer soil body, because this time can further shorten according to live progress.
Claims (10)
1. a kind of construction technology of deep soft soil treatment, includes the following steps：
S1, preparation of construction are smooth by the site clearing in pending precompressed zone；
S2 is laid with sand bedding course on the place after S1 is smooth and vertical drainage device is set into the soil body, in the soil of precompressed zone
The evenly spaced drainage channel of multiple tracks is formed in vivo；
S3, vacuum tube screen cloth are set, horizontal tube, VERTICAL TUBE (1) including being used for gas bleeding and partial moisture, the VERTICAL TUBE
(1) horizontal tube is communicated in, the horizontal tube is connected with vacuum pump, and the horizontal tube is embedded in sand bedding course, described vertical
Pipe (1) is embedded in by S2 treated the soil bodys；
S4, diaphragm seal are laid with, and multi-layer sealed film is equipped with, and the diaphragm seal is pasted in S3 treated soil body upper surface place Min layers
Splice grafting is on the soil body；
S5, sealing ditch are dug, and dig sealing ditch along the precompressed zone surrounding outer rim, four film sides of the diaphragm seal are embedded in
In the sealing ditch, the sealing cover body that five faces are sealing is formed；
S6 starts vacuum pump, and vacuum preconsolidation operation is carried out to the soil body by S5 processing；
S7 after the processing for completing S6, removes vacuum pump and horizontal tube, installs mudjack and is connected to the VERTICAL TUBE described in S3
(1), it prepares grouting liquid and cementing operations is carried out by the VERTICAL TUBE (1)；
During cementing operations as described in S7, the VERTICAL TUBE (1) is drawn upwardly out several times by S8, and after being lifted up every time
Continue cementing operations, until the VERTICAL TUBE (1) extracts the soil body completely, sealing of hole completes the processing to deep soft foundation；
The VERTICAL TUBE (1) has good gas permeability and its outer surface is enclosed with filtration material, and the VERTICAL TUBE (1) is in soil
Internal one end is additionally provided with the openable grout outlet (2) for grouting liquid outflow.
2. a kind of construction technology of deep soft soil treatment according to claim 1, it is characterised in that：It is vertical described in S3
It manages and promotion part (3) is slidably connected at the grout outlet (2) of (1), the promotion part (3) is set in downwardly projecting taper, described
The connection external sliding groove (4) set in end is additionally provided on inner wall at grout outlet (2), the promotion part (3) is slidably connected to
In the sliding groove (4), when the VERTICAL TUBE (1) drives the promotion part (3) downward, the promotion part (3) is connected to institute
It states on sliding groove (4) roof and is synchronized with the movement with the VERTICAL TUBE (1), when the VERTICAL TUBE (1) is lifted up, the propulsion
Portion (3) is detached from along the sliding groove (4) and the VERTICAL TUBE (1).
3. a kind of construction technology of deep soft soil treatment according to claim 2, it is characterised in that：The VERTICAL TUBE (1)
Check valve is inside additionally provided with, the grouting liquid can be moved downward by the check valve.
4. a kind of construction technology of deep soft soil treatment according to claim 3, it is characterised in that：The horizontal tube is band
Leachy PVC pipeline, and it is wrapped with filtration material outside, the end point of the horizontal tube is set for closing.
5. a kind of construction technology of deep soft soil treatment according to claim 4, it is characterised in that：By S3, treated
The measuring instrument device for detecting inside soil body air pressure level is also embedded in the soil body.
6. a kind of construction technology of deep soft soil treatment according to claim 1, it is characterised in that：Sand pad described in S2
Layer includes upper and lower two layers, and TGXG is also embedded between two layers, and the thickness of the sand bedding course is 50-80cm, using containing mud
The medium coarse sand of amount≤3% is laid with.
7. a kind of construction technology of deep soft soil treatment according to claim 4, it is characterised in that：The drainage arrangement is
Plastic draining belt, and filtration material is arranged with outside the plastic draining belt, spacing is between plastic draining belt described in each two
0.8-1.5m。
8. a kind of construction technology of deep soft soil treatment according to claim 1, it is characterised in that：Sealing described in S4
Film is the special geomembrane of polyvinyl chloride, thickness 0.12-0.14mm, and the diaphragm seal is equipped with to protect its complete up and down
Whole seepage of water geotextiles.
9. a kind of construction technology of deep soft soil treatment according to claim 1, it is characterised in that：Sealing described in S5
Trench depth is 2-3m, and the film side of the diaphragm seal is along the inner wall of the sealing ditch vertically into ditch body and being laid in described close
It seals on the bottom of trench of ditch, bottom of trench tiling, which has in the sealing ditch of diaphragm seal, to be also backfilled to using clay or mud at 1/2 height of ditch body,
It carries out covering water process after the completion of backfill again and is filled until ditch will be sealed.
10. a kind of construction technology of deep soft soil treatment according to claim 1, it is characterised in that：After S8 is handled
Soil body upper surface also heap be loaded with precompressed carrier, the pre- ballast carrier is more than or equal to the load that the soil body applies the design of building
Load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711330615.0A CN108239972A (en) | 2017-12-13 | 2017-12-13 | A kind of construction technology of deep soft soil treatment |
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| CN201711330615.0A CN108239972A (en) | 2017-12-13 | 2017-12-13 | A kind of construction technology of deep soft soil treatment |
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| CN109505211A (en) * | 2019-01-16 | 2019-03-22 | 安徽鸿宇路桥工程有限公司 | Reinforcement of Soft Soil Subgrade method |
| CN109778826A (en) * | 2019-01-29 | 2019-05-21 | 程桂香 | A kind of construction of soft soil treatment method based on Novel foam concrete |
| CN110258501A (en) * | 2019-07-13 | 2019-09-20 | 北京中岩大地科技股份有限公司 | A kind of negative pressure of vacuum grouting method and device |
| CN112211178A (en) * | 2020-10-29 | 2021-01-12 | 上海兴怡基础工程有限公司 | Method for dewatering treatment of soft foundation by film sealing vacuum well point |
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| CN109778826A (en) * | 2019-01-29 | 2019-05-21 | 程桂香 | A kind of construction of soft soil treatment method based on Novel foam concrete |
| CN110258501A (en) * | 2019-07-13 | 2019-09-20 | 北京中岩大地科技股份有限公司 | A kind of negative pressure of vacuum grouting method and device |
| CN112211178A (en) * | 2020-10-29 | 2021-01-12 | 上海兴怡基础工程有限公司 | Method for dewatering treatment of soft foundation by film sealing vacuum well point |
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