CN107034873B - The method for processing foundation of the multidirectional precompressed of combined vacuum is squeezed in a kind of side - Google Patents
The method for processing foundation of the multidirectional precompressed of combined vacuum is squeezed in a kind of side Download PDFInfo
- Publication number
- CN107034873B CN107034873B CN201710435974.6A CN201710435974A CN107034873B CN 107034873 B CN107034873 B CN 107034873B CN 201710435974 A CN201710435974 A CN 201710435974A CN 107034873 B CN107034873 B CN 107034873B
- Authority
- CN
- China
- Prior art keywords
- steel pipe
- air bag
- vacuum
- precompressed
- multidirectional
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Landscapes
- 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)
- Paleontology (AREA)
- 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 the method for processing foundation that the multidirectional precompressed of combined vacuum is squeezed in a kind of side, belong to geotechnical engineering field.Its step are as follows: 1) smooth location；2) pave sand bedding course；3) plastic draining board, the steel pipe with air bag to design position are plugged；4) vacuum pipe network, loading line are laid with；5) sealing ditch is excavated, sand bedding course and sealing film are laid with；6) lap hermetically vacuum pump, vacuum line, inflator pump, loading line；7) start vacuum pump, the multidirectional precompressed of inflator pump；8) precompressed terminates, removal vacuum line, disassembly air bag, latch closure etc.；9) the cement injection slurries into steel pipe；10) steel pipe is recycled.The present invention can provide the horizontal direction pressure for being much larger than vacuum load, increase the precosolidation pressure of the soil body, improve the soil strength in consolidation, accelerate the discharge of pore water, effectively reduce the sedimentation under ground working load, the quick detachable assembling of the steel pipe with air bag that the present invention designs facilitates recycling to reuse.
Description
Technical field
It is particularly that a kind of side is crowded the invention belongs to geotechnical engineering field more particularly to dealing with foundation field
The method for processing foundation of the multidirectional precompressed of combined vacuum.
Background technique
With economic rapid development, coastal developed countries and regions, a large amount of workshops, harbor work, housing construction makes soil
Ground resource is more nervous.It reclaims fields from the sea to become and solves " people contradiction " maximally efficient method.It cuts into a mountain for quarrying as initial epeirogenetic
The source means of material influence the reasons such as big to natural ecology and have been prohibited in many areas because massif resource is nervous；Closely
Bank adopts sand also and has the shortcomings that quite big to bank construction of structures and Navigation in Navigable security implication, and sand source people in short supply have in addition
It is considered as other materials hydraulic reclamation.The annual river in China, river, the dredging engineering in lake can generate a large amount of dredging silt, dredge
It dredges mud and needs that the place of large area is accumulated and effect on environment is big, and dredging silt is not only solved as hydraulic reclamation material and is filled out
Material source also solves the stacking problem of dredging silt, reduces engineering cost, protects natural environment.Therefore dredging silt is
As the preferred material in reclamation engineering instantly.
However blowing-filling sludge is even in the depositional phase because its moisture content height, self weight consolidation are not yet completed.Therefore need by
It can be used after artificial treatment, currently used method for processing foundation has: preloading, vacuum method, superhigh pressure jetting
Injection slurry method, deep mixing method etc..Vacuum method is because its construction technology, equipment are simple, and low energy consumption, and operating efficiency is high, reinforces
The advantages that expense is low, is not necessarily to a large amount of preloadings, and noiseless is without friction, non-environmental-pollution has been widely used at soft soil along the coast
In reason, good social and economic benefits are achieved.However traditional vacuum method is still deposited during reinforcing soft ground
Big with depth loss in vacuum degree, bad to the consolidation effect of the deep position soil body, the reinforcing period is longer, reinforces groundwork carrying
Power improves the problems such as limited.
Summary of the invention
There is provided herein the method for processing foundation that the multidirectional precompressed of combined vacuum is squeezed in a kind of side to solve the above-mentioned problems, specifically
It comprises the steps of:
1, big machinery substantially flattens place, and carrying out temporary drain ensures in time to draw surface water at foundation stabilization
Manage range.
2, sand bedding course paves, it is ensured that its flatness, paving thickness, compactness reach design requirement.
3, construction personnel makes drain bar with theodolite etc. in fixed reinforcing scope, steel pipe with air bag is beaten
If position, plastic draining board and the steel pipe with air bag are plugged to design position, perpendicularity deviation is controlled and is not greater than 1.5%.
4, same elevation can be laid on, carry out and fill by being laid with vacuum pipe network and loading line, vacuum official website and loading line
The overlap joint work of air pipe and the steel tube end part with air bag.
5, sealing ditch is excavated, sealing trench depth is not less than 1.5m.
6, it is laid with sealing film, the ride comfort of geotextiles is checked before plastic film mulch, removes the sharp sundries in geotextiles, it then will be close
By the design number of plies, successively on stabilization zone, sealing film is overlapped bedding sealer using hot sticky method, and the lap of splice is not less than 15mm.It will
Film surrounding seals ditch with clay backfilling and pours water along sealing ditch inner wall embedment sealing ditch.
7, vacuum tube Netcom crosses out diaphragm and is controlled to a vacuum pump sealing, and loading line is connect by going out diaphragm with inflator pump close
Envelope, out diaphragm connection must seal securely.
8, starting vacuum pump vacuumizes, and the water and air under sealing film in the soil body is released, and persistently vacuumizes until pre-
Pressure terminates, and ensures that vacuum degree reaches 80kpa and maintains to stablize in pre-compaction process.
9, it vacuumizes while starting inflator pump and inflated into the steel pipe with air bag, atmospheric pressure value is according to design requirement in steel pipe
It is determined with field test, the pressure value for reaching design requirement is needed in pre-compaction process and maintains to stablize.
10, after precompressed, unclamps valve and above mention slide bar on steel pipe after the gas discharge in air bag and steel pipe to first
Latch closure, air bag, slide bar, slip ring are dismantled in beginning position.
11, the cement grout that the perfusion ratio of mud is 0.5: 1 into the steel pipe with air bag above mentions steel pipe after slip casting,
Recycling is used to next time.
The steel pipe with air bag is by widened pile top, pile body, annular buckle, air inflation nozzle, slide bar, slip ring, gas
Capsule, the composition such as piston.
The pipe diameter is 48mm, wall thickness 3.5mm, and side wall is reserved with Φ 15mm, and hole center spacing 35mm's goes out
Gas grouting port, and its sidewall symmetry position is reserved with the vertical rail axis that wide 15mm runs through side wall, sets piston, slide bar in steel pipe side wall
Piston in steel pipe is connected and fixed with the slip ring for being looped around steel pipe side wall, and steel pipe upper end is connected with an annular buckle,
Buckle upper end is connected with screw-type air inflation nozzle, air inflation nozzle built-in valve core.
The air bag material is butyl rubber rubber, and the sealing of rubber pneumatic bag one end is fixed on annular snap and buckles end, and one end is close
Sealing is scheduled on slip ring surrounding.
The vacuum pipe network and loading line may be arranged at same elevation.
The expansion pile top maximum diameter is 1.2-1.8 times of the diameter of steel pipe.
Its air pressure inside value of the steel pipe with air bag is determined according to design requirement and field test, in pre-compaction process
Its air pressure inside need to be maintained to stablize.
After the present invention is by setting the steel pipe to design altitude with air bag between plastic draining board, pipe diameter is
48mm, wall thickness 3.5mm, side wall are reserved with Φ 15mm, the outlet grouting port of hole center spacing 35mm, and its sidewall symmetry position
It is reserved with the vertical rail axis that wide 15mm runs through side wall.Slide bar is passed through into the piston in steel pipe and is looped around the slip ring of steel pipe side wall
It is connected and fixed.Assemble the annular buckle of steel pipe upper end, the air inflation nozzle of the screw-type of connection buckle upper end.One end of air bag is fixed
In the upper end of latch closure, the other end of air bag, which is fixed on slip ring and connects, needs fixing seal.In work progress, air bag is had
Steel pipe be connected with loading line by screw-type gas nozzle, piston moves downward for gas pressure promotion in gas replenishment process, piston band
Moving slide-bar is moved downward along rail axis, slip ring is as slide bar moves downward.Air bag is fixed on the motionless of latch closure upper end, fixed
One end on slip ring is moved downward with slip ring.Originally it is gradually opened up around the butyl rubber air bag being deposited in around latch closure
It opens, the reserved external gas leakage of hole in pile body position makes inflation in air bag, and it drops down onto and expands at pile top position to slide bar, butyl
Glue air bag is fully deployed, and lasting inflation is until reach design load.After precompressed, valve is unclamped, to gas in air bag and steel pipe
Slide bar is pulled out on after body exclusion, disassembly latch closure, piston, slip ring and sliding bar reserve priming petock in the steel pipe of hole to side wall
The cement grout of gray scale 0.5: 1 to slurries fill up the former space expanded where air bag, above pull out steel pipe recycling and use to next time.
The beneficial effects of the present invention are as follows:
1, the present invention is by vertically setting the steel pipe with air bag and to its inner inflatable, it is possible to provide one much larger than true
The horizontal force of empty load increases the precosolidation pressure of the soil body, improves the intensity during soil solidifying, reduces ground and exists
Sedimentation under working load improves consolidation effect.
2, the present invention generates positive excess pore water pressure by horizontal direction inflation, and vacuum preloading forms negative super quiet hole
Waterpower, the two joint can increase hydraulic gradient, accelerate the discharge of pore water, shorten the construction period.
3, the present invention by into steel pipe cement injection slurries can further improve the foundation bearing capacity after work.
4, the steel pipe of the present invention with air bag can the factorial production, industrialization assembling, can be recycled, have it is good
Popularization and application foreground.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of steel pipe of the present invention with air bag.
Fig. 2 is the basement process schematic diagram that the method for processing foundation of the multidirectional precompressed of combined vacuum is squeezed using side.
Fig. 3 is the steel-tube construction signal in inflation, after inflation in three different periods with air bag before respectively inflation
Figure.
Fig. 4 is the sectional view of steel pipe slide bar position of the present invention with air bag.
In figure: 1, widened pile top；2, slip ring；3, slide bar；4, piston；5, butyl rubber air bag；6, pile body side wall is reserved
Inflation, grouting port；7, rail axis；8, annular buckle；9, screw-type gas nozzle；10, plastic draining board；11, steel pipe；12, seal ditch；
13, inflator pump；14, loading line；15, vacuum tube；16, vacuum pump；17, sand bedding course；18, seal film.
Specific embodiment
Referring to Fig. 1-4, the method for processing foundation of the multidirectional precompressed of combined vacuum, the used steel with air bag are squeezed in a kind of side
Managing includes butyl rubber air bag 5, screw-type gas nozzle 9, annular buckle 8, the reserved inflation grouting port 6 of side wall, and widened pile top 1 is slided
Rotating ring 2, piston 4 vertically reserve rail axis 7, slide bar 3.Pipe diameter is 48mm, wall thickness 3.5mm, and side wall is reserved with Φ 15mm,
The outlet grouting port of hole center spacing 35mm, and its sidewall symmetry position is reserved with the vertical rail axis 7 that wide 15mm runs through side wall, steel
Piston 4 is set in pipe side wall, the piston 4 that slide bar 3 passes through in steel pipe is connected and fixed with the slip ring 2 for being looped around steel pipe side wall, steel pipe
Upper end is connected with an annular buckle 8, and buckle upper end is sealedly connected with screw-type air inflation nozzle 9,9 built-in valve core of air inflation nozzle.
The method for processing foundation of the multidirectional precompressed of combined vacuum is squeezed in a kind of side of the present invention, comprising the following steps:
1, big machinery is marched into the arena, smooth location, and excavation, which carries out temporary drain, to ensure surface water to be drawn ground in time
Consolidation process range.
2, survey engineer level and theodolite pave range measuring to sand bedding course 17, machine spreading sand bedding course and by
Hand fit paves sand material smooth, it is ensured that its flatness, compactness meet design requirement.
3, the steel pipe 11 and butyl rubber air bag 5 of prefabricated corresponding size shape, pipe diameter 48mm, wall thickness 3.5mm,
Side wall, which is reserved with Φ 15mm, the outlet grouting port of hole center spacing 35mm, and its sidewall symmetry position and is reserved with wide 15mm, to be run through
The vertical rail axis 7 of side wall, sets piston 4 in steel pipe side wall, and slide bar 3 passes through piston 4 in steel pipe and the cunning that is looped around steel pipe side wall
Rotating ring 2 is connected and fixed, and steel pipe upper end is connected with an annular buckle 12, and buckle upper end is connected with screw-type air inflation nozzle 9, air inflation nozzle
9 built-in valve cores, the sealing of 5 one end of rubber pneumatic bag are fixed on 8 upper ends of annular buckle, and one end sealing is fixed on 2 surrounding of slip ring, even
Connecing need to guarantee to seal.
4, construction personnel orients the hole location of steel pipe and plastic draining board 10 with air bag, machine in fixed stabilization zone
In 1.5%.
5, it is laid with vacuum pipe network, loading line, loading line and vacuum official website can be laid on same elevation, gas tube and band
Have between the steel pipe of air bag using the connection sealing of screw-type gas nozzle.
6, sealing ditch 12 is excavated, sealing 12 depth of ditch is not less than 1.5m.
7, it is laid with sealing film 18, the ride comfort of geotextiles is checked before plastic film mulch, removes sharp sundries, then by the design number of plies
Successively on stabilization zone, sealing film is overlapped bedding using hot sticky method, and the lap of splice is not less than 15mm.By film surrounding along sealing ditch
In inner wall embedment sealing ditch, and pour water sealing closely knit with clay backfilling.
8, vacuum tube 15 connect sealing with vacuum pump 16 by going out diaphragm, and gas tube 14 is connected by going out diaphragm and inflator pump 13
Sealing is connect, diaphragm connection out must seal securely.
9, starting vacuum pump 16 vacuumizes, and the water and air for sealing under film in the soil body is released, persistently vacuumize until
Precompressed terminates, and ensures that vacuum degree reaches 80kpa and maintains to stablize in pre-compaction process.
10, starting vacuum pump 16 starts inflator pump 13 simultaneously and inflates into gas tube 14, and atmospheric pressure value is according to design in steel pipe
It is required that being determined with field test, the pressure value for reaching design requirement is needed in pre-compaction process and maintaining to stablize.
11, after precompressed, valve is unclamped, after gas discharge in air bag 5 and steel pipe 11, upper belt has the steel pipe of air bag
On slide bar 3 to initial position, dismantle latch closure 8, air bag 5, slide bar 3, slip ring 2.
12, the cement grout that the ratio of mud is 0.5: 1 is perfused into steel pipe 11 until slurries fill up where former expansion air bag
Space is above pulled out the recycling of steel pipe 11 and is used to next time.
Claims (7)
1. the method for processing foundation that the multidirectional precompressed of combined vacuum is squeezed in a kind of side, it is characterised in that comprise the steps of:
1) place, is flattened, temporary drain is carried out；
2), sand bedding course paves；
3), measuring goes out drain bar, steel pipe with air bag sets position, plugs plastic draining board and steel pipe with air bag extremely
Design altitude；
4) it, is laid with vacuum pipe network and loading line, carries out relevant overlap joint work；
5) sealing ditch, is excavated；
6) it, is laid with sealing film, seal ditch with clay backfilling and is poured water；
7), vacuum tube Netcom crosses out diaphragm and is controlled to a vacuum pump sealing, and loading line connect sealing with inflator pump by going out diaphragm；
8), starting vacuum pump vacuumizes, and persistently vacuumizes until precompressed terminates；
9), vacuumize while starting inflator pump and inflated into the steel pipe with air bag, in steel pipe atmospheric pressure value according to design requirement and
Field test determines, the pressure value for reaching design requirement is needed in pre-compaction process and maintains to stablize；
10) valve, is unclamped after precompressed, above mentions slide bar on steel pipe after gas discharge in air bag and steel pipe, disassembly slide bar,
Air bag, latch closure, air inflation nozzle etc.；
11) cement grout that the ratio of mud is 0.5: 1, is perfused into steel pipe, after slip casting on pull out steel pipe, recycle to make next time
With.
2. the method for processing foundation that the multidirectional precompressed of combined vacuum is squeezed in a kind of side according to claim 1, it is characterised in that: step
It is rapid 3) described in the steel pipe with air bag by widened pile top, pile body, annular buckle, air inflation nozzle, slide bar, slip ring, air bag is living
Plug etc. is constituted.
3. the method for processing foundation that the multidirectional precompressed of combined vacuum is squeezed in a kind of side according to claim 1, it is characterised in that: step
It is rapid 3) described in the steel pipe with air bag be assembled, the positions such as slide bar, air bag, latch closure, gas nozzle are detachable.
4. the method for processing foundation that the multidirectional precompressed of combined vacuum is squeezed in a kind of side according to claim 1, it is characterised in that: step
It is rapid 3) described in the steel pipe and loading line with air bag between, air inflation nozzle and annular buckle between, annular buckle and steel pipe on
Screw-type connection sealing is all made of between end.
5. the method for processing foundation that the multidirectional precompressed of combined vacuum is squeezed in a kind of side according to claim 1, it is characterised in that: step
It is rapid 7) described in vacuum pipe network and loading line can be laid on same elevation.
6. the method for processing foundation that the multidirectional precompressed of combined vacuum is squeezed in a kind of side according to claim 2, it is characterised in that: institute
The pipe diameter with air bag stated is 48mm, wall thickness 3.5mm, and side wall is reserved with Φ 15mm, and hole center spacing 35mm's goes out
Gas grouting port, and its sidewall symmetry position is reserved with the vertical rail axis that wide 15mm runs through side wall, sets piston, slide bar in steel pipe side wall
Piston in steel pipe is connected and fixed with the slip ring for being looped around steel pipe side wall, and steel pipe upper end is connected with an annular buckle,
Buckle upper end is sealedly connected with screw-type air inflation nozzle, air inflation nozzle built-in valve core.
7. the method for processing foundation that the multidirectional precompressed of combined vacuum is squeezed in a kind of side according to claim 2, it is characterised in that: institute
The air bag material stated is butyl rubber, and the sealing of air bag one end is fixed on annular snap and buckles end, and one end sealing is fixed on slip ring four
Week.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710435974.6A CN107034873B (en) | 2017-06-08 | 2017-06-08 | The method for processing foundation of the multidirectional precompressed of combined vacuum is squeezed in a kind of side |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710435974.6A CN107034873B (en) | 2017-06-08 | 2017-06-08 | The method for processing foundation of the multidirectional precompressed of combined vacuum is squeezed in a kind of side |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107034873A CN107034873A (en) | 2017-08-11 |
| CN107034873B true CN107034873B (en) | 2019-02-12 |
Family
ID=59541109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710435974.6A Active CN107034873B (en) | 2017-06-08 | 2017-06-08 | The method for processing foundation of the multidirectional precompressed of combined vacuum is squeezed in a kind of side |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107034873B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017931B (en) * | 2019-03-28 | 2021-04-13 | 天津大学 | Shield tunnel outside soil pressure measuring device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006111786A1 (en) * | 2005-04-22 | 2006-10-26 | Bozidar Miljovski | A method for construction of piles and caissons and soil improvement by using rubber hoses |
| CN101033609A (en) * | 2007-03-27 | 2007-09-12 | 天津大学 | Method of reinforcing soft soil foundation by gas extrusion drainage and used gasbag |
| CN102220755A (en) * | 2011-04-15 | 2011-10-19 | 中港基业（北京）岩土技术有限公司 | Overpressure vacuum dewatering combined dynamic consolidation foundation treatment method |
| CN106284277A (en) * | 2016-08-22 | 2017-01-04 | 南京新都地下工程研究院有限公司 | A kind of air sac pressing draining combined vacuum precompressed foundation reinforcement method |
-
2017
- 2017-06-08 CN CN201710435974.6A patent/CN107034873B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006111786A1 (en) * | 2005-04-22 | 2006-10-26 | Bozidar Miljovski | A method for construction of piles and caissons and soil improvement by using rubber hoses |
| CN101033609A (en) * | 2007-03-27 | 2007-09-12 | 天津大学 | Method of reinforcing soft soil foundation by gas extrusion drainage and used gasbag |
| CN102220755A (en) * | 2011-04-15 | 2011-10-19 | 中港基业（北京）岩土技术有限公司 | Overpressure vacuum dewatering combined dynamic consolidation foundation treatment method |
| CN106284277A (en) * | 2016-08-22 | 2017-01-04 | 南京新都地下工程研究院有限公司 | A kind of air sac pressing draining combined vacuum precompressed foundation reinforcement method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107034873A (en) | 2017-08-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101270571B (en) | Reinforcing method for layered dead weight, prepressing water discharge concretion combination dynamic consolidation soft ground base | |
| CN104120710B (en) | A kind of highway on soft ground method of vacuum pre-pressed joint serous fluid of dredger fill | |
| CN104652413B (en) | A kind of new mudflat sludge Roadbed Treatment | |
| CN105442622A (en) | Water-retaining construction technology for locked steel pipe piles | |
| CN101130952A (en) | Packingless fast vacuum prepressing dynamic consolidation method | |
| CN104499479A (en) | Dig-hole pile construction method based on penetration of sand gravel backfilling layer | |
| CN107217683B (en) | Drainage pipeline foundation filling seepage-proofing collapse-proofing structure and construction method thereof | |
| CN106836176A (en) | Sand soil and the method for improveing its engineering characteristic are reinforced using vacuum pumping technology | |
| CN205636721U (en) | Strain equipment that well vacuum preloading consolidated deep soft soil foundation | |
| CN110512592B (en) | Vacuum preloading and guide pipe pile gas injection carbonization ultra-soft foundation reinforcement processing system | |
| CN113373962B (en) | Combined leakage stoppage construction method for deep foundation pit | |
| CN107034873B (en) | The method for processing foundation of the multidirectional precompressed of combined vacuum is squeezed in a kind of side | |
| CN204456058U (en) | A kind of constructing structure reducing building base subsidence speed | |
| CN101586341B (en) | Water sealing method for civil engineering groundwork | |
| CN101591906A (en) | The method for processing foundation of intubate, multipass vacuum well-point dewatering dynamic consolidation | |
| CN103306270A (en) | Method for processing environment-friendly deep soft soil shallow foundation and device for reinforcing foundation | |
| CN105804045A (en) | Equipment for strengthening deep soft soil foundation by vacuum preloading of filter well and method | |
| CN102704458A (en) | Sand-free cushion layer vacuum-surcharge preloading reinforcement device and method for soft ground | |
| CN110485405B (en) | Reinforcing system and reinforcing method for soft soil foundation | |
| CN105297702B (en) | Vacuum preloading deep-layer lateral sealing construction method | |
| CN105484229A (en) | Overlying mud layer seal vacuum pre-pressing method suitable for water area soft foundation | |
| CN207904912U (en) | Band expands shoe stake side two-step-filling construction of prefabricated piles structure | |
| CN209523186U (en) | A kind of continuous underground wall structure for strong runoff solution cavity | |
| CN210087318U (en) | Underwater vertical shaft lining device | |
| CN203741813U (en) | Soft soil combined pre-compaction structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |