CN110158598A - A kind of large diameter pile foundation wash preventing method and device that main passive protection combines - Google Patents
A kind of large diameter pile foundation wash preventing method and device that main passive protection combines Download PDFInfo
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- CN110158598A CN110158598A CN201910472093.0A CN201910472093A CN110158598A CN 110158598 A CN110158598 A CN 110158598A CN 201910472093 A CN201910472093 A CN 201910472093A CN 110158598 A CN110158598 A CN 110158598A
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- sizing device
- slip casting
- pile foundation
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000005086 pumping Methods 0.000 claims abstract description 67
- 239000002002 slurry Substances 0.000 claims abstract description 66
- 238000007569 slipcasting Methods 0.000 claims abstract description 52
- 238000004513 sizing Methods 0.000 claims abstract description 46
- 239000002689 soil Substances 0.000 claims abstract description 30
- 230000003628 erosive effect Effects 0.000 claims abstract description 25
- 239000000243 solution Substances 0.000 claims abstract description 13
- 238000005516 engineering process Methods 0.000 claims abstract description 11
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 10
- 101000965313 Legionella pneumophila subsp. pneumophila (strain Philadelphia 1 / ATCC 33152 / DSM 7513) Aconitate hydratase A Proteins 0.000 claims abstract description 9
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000004202 carbamide Substances 0.000 claims abstract description 9
- 238000010276 construction Methods 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 8
- 239000011259 mixed solution Substances 0.000 claims abstract description 6
- 241001037822 Bacillus bacterium Species 0.000 claims abstract description 5
- 239000001110 calcium chloride Substances 0.000 claims abstract description 5
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 27
- 239000010959 steel Substances 0.000 claims description 27
- 229920002472 Starch Polymers 0.000 claims description 14
- 235000019698 starch Nutrition 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 6
- 239000008107 starch Substances 0.000 claims description 6
- 230000015271 coagulation Effects 0.000 claims 1
- 238000005345 coagulation Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 13
- 238000002347 injection Methods 0.000 abstract description 11
- 239000007924 injection Substances 0.000 abstract description 11
- 230000008901 benefit Effects 0.000 abstract description 5
- 210000000003 hoof Anatomy 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 230000006641 stabilisation Effects 0.000 description 7
- 238000011105 stabilization Methods 0.000 description 7
- 244000005700 microbiome Species 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 229910021532 Calcite Inorganic materials 0.000 description 3
- 230000033558 biomineral tissue development Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 241000193830 Bacillus <bacterium> Species 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 102000005701 Calcium-Binding Proteins Human genes 0.000 description 1
- 108010045403 Calcium-Binding Proteins Proteins 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002512 chemotherapy Methods 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/06—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of large diameter pile foundation wash preventing methods and device that main passive protection combines, this method is main are as follows: setting grouting device, Grouting Pipe is fixed on pile body with spiral yarn shaped, sizing device is taken out in the area edge setting to be reinforced of pile foundation protection against erosion, slip casing by pressure is carried out by grouting device, pumping slurry is carried out by taking out sizing device simultaneously, slip casting is based on MICP technology: first injecting pH7-8 bars of formula bacillus bacterium solution, reinject calcium chloride solution, finally injection urea and calcium chloride mixed solution, after the completion, by grouting device and take out sizing device role exchange, above-mentioned slip casting is carried out again takes out slurry process, it can be repeated multiple times；This method can reduce the impact of water flow, reduce shape of a hoof whirlpool, weaken water flow and wash away to sea bed, while can form crust layer on sea bed surface, greatly enhance the protection against erosion ability of sea bed.The present invention has many advantages, such as small to soil disturbance, easy for construction, reusable, general applicability is good, has a extensive future.
Description
Technical field
The present invention relates to large diameter pile foundation wash preventing method and device more particularly to a kind of master based on MICP technology are passive
The large diameter pile foundation wash preventing method and device combined is protected, biotechnology fixed buildings field is belonged to.
Background technique
Offshore pile using increasing, for protection against erosion problem in Sandy Seabed, current pile foundation protection against erosion measure
Mainly have and sacrifices stake method, guard ring, protective case method, pile body before stake and crack method, downstream slabstone method, jackstone method, Extended chemotherapy method, grouting method
Deng, but existing method has very big deficiency.Stake method and downstream slabstone method are sacrificed before stake when water (flow) direction changes, and are played
Effect reduce and be even reduced to zero；Guard ring, protective case method its position when sea bed face changes are easy to happen variation, and later period
Maintenance difficulties are big；Pile body cracks method pile gap easily by foreign matters from being blocked, loses the function of weakening water flow；Jackstone method globality compared with
Difference, late maintenance cost and larger workload；Expand pile foundation method to be difficult to play the effect of its protection against erosion when sea bed face changes；
Grouting method has greater environmental impacts, and is unfavorable for marine organisms existence.
In recent years, microorganism soil stabilization technology is quickly grown, and with convenient and quick construction, grouting pressure is low, reinforces effect
Fruit is good, generates many advantages, such as disturbance is small, environmental-friendly.The cardinal principle of the method is cementing scattered using the mineralization of microorganism
Intensity, the rigidity of the bulk soil body greatly improved in body soil particle.The current best Microbial Metallogenesis of cementing effect is to generate
Calcite type calcium carbonate deposition, this mineralization are known as microorganism induction calcite precipitation (Microbiologically
Induced calcite precipitation, abbreviation MICP), correlative study show the method it is cementing it is high-efficient, soil strength is big
Width is promoted.Presently the most maturation is hydrolysis of urea MICP technology, and main process is that PH7-8 bars of formula bacillus hydrolyzes urea production
Raw carbanion and ammonium ion, the calcium binding in carbanion and slip casting solution, which is formed, later has cementation
Calcium carbonate crystal.
The present invention by MICP technical application into the protection of ocean pile foundation scour, while the side combined using main passive protection
Method weakens water flow and washes away to sea bed, while the soil body a certain range of in Sandy Seabed is carried out curing process, has invented one
Kind is small to soil disturbance, and convenient and fast grouting device of constructing ensure that erosion control brushing effects, protect environment, accelerates construction speed,
It reduces costs.
Summary of the invention
The present invention washes away problem for large diameter pile foundation in Sandy Seabed, existing pile foundation protection against erosion technology there are it is many not
In the case where foot, a kind of large diameter pile foundation wash preventing method and device led and passively combined is proposed；This method is by Grouting Pipe
Be fixed on pile body with spiral shape, can reduce water flow impact, reduce shape of a hoof whirlpool, weaken water flow sea bed is washed away, simultaneously
Cementing soil particle is acted on to form crust layer within the scope of the certain depth of sea bed surface using microbial mineralization, reinforces topsoil
Body globality improves its strength and stiffness, ensure that the safety of offshore structure.The present invention is used by being self-possessed novel pumping (note)
The mode of the sizing device injection soil body, accelerates construction speed, reduces the disturbance to the soil body.In addition, the technology also has flow-disturbing
Many advantages, such as ability is strong, cementing high-efficient, environmental-friendly, at low cost, and later maintenance is few, substantially increases stake in Sandy Seabed
Base erosion resistibility.
The present invention takes following technical scheme:
A kind of large diameter pile foundation wash preventing method that main passive protection combines, be setting grouting device, by Grouting Pipe with
It is spiral yarn shaped to be fixed on pile body, sizing device is taken out in the area edge setting to be reinforced of pile foundation protection against erosion, pressure is carried out by grouting device
Slip casting, while pumping slurry is carried out by taking out sizing device, slip casting is based on MICP technology: pH7-8 bars of formula bacillus bacterium solution is first injected, then
Inject calcium chloride solution, finally inject urea and calcium chloride mixed solution, after the completion, by grouting device and take out sizing device slip casting,
Slurry role exchange is taken out, above-mentioned slip casting is carried out again and takes out slurry process, it can be repeated multiple times.
A kind of large diameter pile foundation protection against erosion pumping sizing device combined based on main passive protection, including grouting device and pumping
Sizing device, grouting device include Grouting Pipe, hollow slip casting annulus, and Grouting Pipe is connected with slip casting annulus and Grouting Pipe helical disk
Around pile body is fixed on, injected hole is provided in Grouting Pipe and slip casting annulus, pumping sizing device is set to pile foundation protection against erosion and waits for stabilization zone
Edge.The grouting device, pumping sizing device can carry out slip casting, take out slurry, can also carry out pumping slurry, slip casting uses.
Preferably, the pumping sizing device, including multiple pumpings starch unit, each pumpings starch unit include hollow steel rotary table,
It is individually fixed in the pumping slurry leg of the multi-functional tube of steel rotary table upper surface, two connecting tubes of side surface and lower surface, it is steel rotary table, more
Function pipe, connecting tube, pumping slurry leg communicate；Connecting tube end has screw thread, can be with by the connection hose that is fixed in connecting tube
Multiple pumpings slurry unit is connected；The pumping slurry leg is elongated steel pipe, if being uniformly provided with dry tap slurry hole on pipe shaft；More function
There can be screw thread in pipe surface, be corresponded on standardization concrete ballast plate and be provided with connecting hole, multi-functional tube is inserted into connecting hole simultaneously
It is fixed by nut by concrete ballast plate is standardized；Slurry pumping port is equipped at the top of multi-functional tube；Steel rotary table side wall is equipped with for applying
The hole for hoist of work.
Preferably, the Grouting Pipe in the grouting device is with the spiral yarn shaped pile body that is fixed on of single, double, triple (such as with welding
Or cementation method is fixed), to reduce the impact of water flow, reduce shape of a hoof whirlpool, weakens water flow and sea bed is washed away.
Preferably, each injected hole on the slip casting annulus, take out that each pumpings starches hole inner wall on slurry leg and outside wall surface is each
It is provided with layer of steel wire net, to prevent silt from blocking injected hole.Aperture is 1cm.
Preferably, the slip casting annulus, pumping, which are starched, is arranged row's slip casting along its axial every 5cm on leg, takes out and starch hole, every row edge
Radial equipartition 8.
Preferably, pumping slurry leg tube bottom is coniform, is easy to the injection soil body.
Preferably, the mode that the multi-functional tube and connecting tube can be connected through a screw thread fixes corresponding lid to seal
Stopped pipe mouth can make to take out a variety of types of attachment of slurry unit composition.
Preferably, the pumping sizing device further includes soil body resistivity measurement dress, and setting is on taking out slurry leg, for dynamically supervising
Survey grouting in soil mass effect.
In terms of MICP slip casting protection against erosion technology of the invention mainly includes following four: first, the present invention by Grouting Pipe with
It is spiral yarn shaped to be fixed on pile body, it weakens ocean current and sea bed is washed away, play the role of active defense.Second, this technology benefit
It is reacted with the hydrolysis of urea MICP of relative maturity, bacterium is PH7-8 bars of formula bacillus, and cementing solution is urea liquid, chlorination
Calcium mixed solution.Third first injects a certain amount of PH7-8 bars of formula bacillus bacterium solution into sand, later using substep slip casting method
It is slowly injected into the calcium chloride solution of low concentration, microorganism is fixed on soil particle surface using the flocculation of calcium ion, most
Low speed injection urea and calcium chloride mixed solution, progress are cementing again afterwards.4th, the present invention takes out the side of slurry using intermediate slip casting edge
Formula infuses the position of (pumping) sizing device by reasonable Arrangement, in the surface layer soil body (0.5m depth or so) in the range that needs reinforcement
Steady seepage field is formed, alternately reaches better consolidation effect by what slip casting, pumping were starched.
Using main advantages of the present invention: 1, reducing impact of the water flow to stake, reduce shape of a hoof whirlpool, weaken water
Stream washes away sea bed；2, cementing discrete particles improve the scour resistance of pile foundation bottom seabed soil；3, do not change originally
Shape, superficial layer are reinforced, not will form marginal scouring effect；4, the mode of self weight injection is small to soil disturbance, and speed of application is fast, dress
It sets reusable；5, relative to traditional chemistry of cement slurries, the present invention is free from environmental pollution, and ecology is friendly；6, this technology is matched
For soil body resistivity test system, slip casting process can be monitored in time, can control the quality of slip casting process well.
Detailed description of the invention
Fig. 1 is that sizing device arrangement and flow field schematic diagram are taken out in single pile protection against erosion stabilization zone；
Fig. 2 is flow field vertical cross section schematic diagram in slip casting pile week sea bed；
Fig. 3 is that pumping slurry cell schematics are hung in work progress；
Fig. 4 is a kind of specific grouting device three-dimensional structure front of the invention schematic diagram；
Fig. 5 is three kinds of spiral form three-dimensional structure front schematic diagrams of grouting device of the invention；
Fig. 6 is a kind of specific slip casting circular ring structure schematic diagram of the present invention；
Fig. 7 is A-A sectional view in a kind of specific slip casting circular ring structure of the present invention；
Fig. 8 is a kind of specific pumping sizing device three dimensional structure diagram of the invention；
Fig. 9 is that a kind of specific take out of the invention starches unit three-dimensional structural schematic diagram；
Figure 10 is concrete ballast plate three-dimensional structure schematic diagram in a kind of specific pumping sizing device of the invention；
Figure 11 is that a kind of specific take out of the invention starches unit main view；
Figure 12 is that a kind of specific take out of the invention starches leg structural schematic diagram；
Figure 13 is that a kind of specific take out of the invention starches B-B sectional view in leg structure；
Wherein, 1 slurry unit, 2 steel rotary tables, 3 multi-functional tubes, 4 connecting tubes, 5 pumping slurry legs, 6 Grouting Pipes, 7 slip casting annulus, 8 are taken out
Slurry hole, 10 standardization concrete ballast plates, 11 connection hoses, 12 slurry pumping ports, 13 holes for hoist, 14 soil body resistivity are taken out in injected hole, 9
Slurry hose is taken out in test device, 15 slip casting hoses, 16.
Specific embodiment
Explanation is further described to technical solution of the present invention below with reference to specific example, which is only the present invention
A kind of specific implementation, not limitation of the invention.
A kind of large diameter pile foundation protection against erosion pumping sizing device that main passive protection combines, including grouting device and pumping slurry dress
It sets, grouting device mainly includes Grouting Pipe 6, slip casting annulus 7；It takes out sizing device to be made of multiple pumpings slurry unit 1, each pumping starches unit
1 include hollow steel rotary table 2, multi-functional tube 3, connecting tube 4, take out slurry leg 5, standardization concrete ballast plate 10, take out slurry hose 16,
Hang chain and soil body resistivity measurement sensor 14 etc.；The construction equipment of cooperation mainly has small-sized workboat (equipped with small-sized
Loop wheel machine), slip casing by pressure machine (small-sized), suction pump etc..Grouting Pipe 6 is fixed on pile body, slip casting with spiral yarn shaped by the grouting device
Pipe 6 links together by welding with slip casting annulus 7, and Grouting Pipe 6 is hollow steel pipe, outer diameter 8cm, slip casting circle
Ring 7 is hollow ring, and cross-sectional outer diameter is axial at interval of 5cm one row's injected hole 8 of setting, every row along annulus section having a size of 10cm
Lay 8 injected holes 8, aperture 1cm.2 main body of steel rotary table is the hollow cylinder of radius (R) 0.4m, thickness (d) 10cm, by
Steel plate cutting is welded, and steel plate thickness used is 2cm；2 bottom of steel rotary table using welding or by the way of being threadedly coupled, starch by fixed take out
Leg 5, taking out slurry 5 main body of leg is elongated steel pipe, and pipe outside diameter is having a size of 8cm, and bottom of the tube is that cone is easy to the injection soil body, and pipe shaft is along diameter
Hole 9 is starched to 8 pumpings of equidistantly distributed, axially spaced 5cm is arranged a row and takes out slurry hole 9, and aperture is preferably 1cm；To prevent in slip casting
Silt blocking injected hole 8 or pumping slurry hole 9 during annulus 7 or pumping slurry 5 injection sea bed of leg, the inner wall in injected hole 8, pumping slurry hole 9
Be respectively provided with one layer of high-strength detailed catalogue steel wire at outer wall, steel wire and pipe shaft weld；Connecting tube 4 is set in 2 side wall of steel rotary table, is taken out
It is linked together between slurry unit 1 by the connection hose 11 being fixed in connecting tube 4, so that entirely taking out phase inside sizing device
It is logical；Multi-functional tube 3, pipe outside diameter 6cm, thickness of pipe 2cm are set in the middle part of top plate, and multi-functional tube side wall is equipped with screw thread, for fixed mark
Standardization concrete ballast plate 10, concrete ballast plate 10 are the cylindrical body of intermediate aperture, and bottom cylindrical face diameter is 40cm, thick
10cm, weighs about 0.25t, and when standardization concrete ballast plate 10 is preferable for seabed conditions, it is difficult to take out slurry leg 5 for intraplate tectonics arrangement of reinforcement
The case where with injection to designated depth；3 end of multi-functional tube is equipped with slurry pumping port 12, takes out slurry hose 16,2 side of steel rotary table for connecting
Wall is equipped with hole for hoist 13, can be connected by high-strength anchor chain or steel strand wires with suspension hook, is convenient for construction hoisting.According to pumping sizing device cloth
Soil body resistivity measurement sensor 14 is arranged in corresponding take out on slurry leg 5 by seated position and stabilization zone shape.Grouting device is simultaneously
It has both and takes out slurry function, take out sizing device and also have both slip casting function, since the slurry viscosity of perfusion is close with water phase, therefore grouting pressure is wanted
It asks low, is slightly larger than water pressure.Specific construction process:
1. selecting screw pitch, spiral form and slip casting annulus 7 according to live streamflow regime in the work progress of pile foundation
Position determines the size of pile foundation protection against erosion stabilization zone according to stake diameter size and takes out sizing device arrangement；According to the close of pile peripheral earth
Solidity determines each 10 quantity of concrete ballast plate for taking out slurry unit 1, then will be taken out with connection hose 11 by connecting tube 4 and starch unit
1 is assembled into pumping sizing device, while arrangement soil body resistivity measurement sensor 14 as needed.
2. Grouting Pipe 6 and slip casting annulus 7 are fixed on pile body, the other end of Grouting Pipe 6 connects slip casing by pressure machine, slip casting
Device enters workspace with the injection of pile foundation.It reuses small-sized lifting ship and assembled pumping slurry unit 1 is successively hung into sea bed
Corresponding position, take out slurry unit 1 multi-functional tube 3 on be fixed with pumping slurry hose 16, take out slurry hose 16 the other end and workboat
On suction pump be connected.Under Gravitative Loads, the pumping for taking out sizing device 1 starches the gradually injection sea bed of leg 5.
3. carrying out slip casing by pressure in being fixed on the grouting device in pile foundation, opens be connected to outside to stabilization zone at the same time
That encloses takes out the suction pump on sizing device, in grouting device and takes out and will form Fig. 1, steady seepage field shown in 2 between sizing device.
Under seepage flow field action, bacterium solution and cementing solution can relatively evenly pass through the stabilization zone soil body.
4. grouting with plunger: being initially injected PH7-8 bars of formula bacillus bacterium solution, bacterium solution enters note (pumping) slurry from Grouting Pipe 6
Inside the slip casting annulus 7 of device, penetrated into seabed soil by the injected hole 8 on slip casting annulus 7, seepage flow shown in Fig. 2
Under field action, residual solution and seawater by soil body exudation are entered in pumping slurry leg 5 by taking out slurry hole 9, then flow into steel rotary table
2, the liquid in each steel rotary table 2 is pooled at slurry pumping port 12 by connecting hose 11, is returned on workboat by taking out slurry hose 15
Corresponding collection, in processing unit.Later with the calcium chloride solution of lower speed injection low concentration, the wadding of calcium ion is utilized
Microorganism is fixed on soil particle surface by solidifying effect.Finally low speed injects urea and calcium chloride mixed solution (cementing solution) again.
In this way, just completing once grouting operation.After the completion of once grouting operation, by the location swap of suction pump and slip casting machine, then slip casting
Device and the exchange function for taking out sizing device, grouting device originally become to take out sizing device, and pumping sizing device originally becomes slip casting dress
It sets, keeps seepage flow field-reversed, then carry out above step.According to the test result of soil body resistivity measurement equipment 14, may be selected to carry out
Multiple slip casting operation.
5. after completing slip casting task, pumping (note) sizing device being recycled and being cleaned using lifting ship.
Claims (9)
1. a kind of large diameter pile foundation wash preventing method that main passive protection combines, which is characterized in that setting grouting device will be infused
The Grouting Pipe of sizing device is fixed on pile body with spiral yarn shaped, sizing device is taken out in the area edge setting to be reinforced of pile foundation protection against erosion, is passed through
Grouting device carries out slip casing by pressure, while carrying out pumping slurry by taking out sizing device, and slip casting is based on MICP technology: first injecting pH7-8 bars
Formula bacillus bacterium solution, reinjects calcium chloride solution, finally injects urea and calcium chloride mixed solution after the completion fills slip casting
It sets and takes out sizing device slip casting, takes out slurry role exchange, carry out above-mentioned slip casting again and take out slurry process, it can be repeated multiple times.
2. a kind of large diameter pile foundation protection against erosion pumping sizing device that main passive protection combines, which is characterized in that filled including slip casting
It sets, take out sizing device, grouting device includes Grouting Pipe (6), hollow slip casting annulus (7), Grouting Pipe (6) and slip casting annulus (7) phase
Logical and Grouting Pipe (6) coiled coil is provided with several injected holes (8) in pile body, Grouting Pipe (6) and slip casting annulus (7) surface, takes out slurry
Device is set to pile foundation protection against erosion area edge to be reinforced.
3. the large diameter pile foundation protection against erosion pumping sizing device that main passive protection as claimed in claim 2 combines, feature exist
In the pumping sizing device is made of multiple pumpings slurry unit (1), and each pumping slurry unit (1) includes: hollow steel rotary table (2), divides
It is not fixed on the pumping slurry leg of the multi-functional tube (3) of steel rotary table (2) upper surface, two connecting tubes (4) of side surface and lower surface
(5), steel rotary table (2), multi-functional tube (3), connecting tube (4), pumping slurry leg (5) communicate；Connecting tube (4) end has screw thread, passes through
Multiple pumpings can be starched unit (1) and connected by the connection hose (11) being fixed on connecting tube (4)；The pumping starches leg (5)
For elongated steel pipe, if being uniformly provided with dry tap slurry hole (9) on pipe shaft；There is screw thread on multi-functional tube (3) surface, standardize coagulation
Corresponding on soil pressure support plate (10) to be provided with connecting hole, multi-functional tube (3) is inserted into connecting hole and will standardize concrete by nut
Carrier plate (10) is fixed；Slurry pumping port (12) are equipped at the top of multi-functional tube (3)；Steel rotary table (2) side wall is equipped with the lifting for construction
Hole (13).
4. the large diameter pile foundation protection against erosion pumping sizing device that main passive protection according to claim 2 combines, feature
Be, the Grouting Pipe (6) in the grouting device can it is single, double or three it is spiral yarn shaped be fixed on pile body, fixed form is weldering
It connects or cementing.
5. the large diameter pile foundation protection against erosion pumping sizing device that main passive protection according to claim 2 or 3 combines, special
Sign is that each injected hole (8), pumping starch each pumping slurry hole (9) inner wall and outer wall on leg (5) on the slip casting annulus (7)
Face is each provided with layer of steel wire net, and aperture is 1cm.
6. the large diameter pile foundation protection against erosion pumping sizing device that main passive protection according to claim 2 or 3 combines, special
Sign is that the slip casting annulus (7) is taken out and infuses on slurry leg (5) along one row of its axial every 5cm setting, takes out slurry hole, and every row is radially
It is 8 uniformly distributed.
7. the large diameter pile foundation protection against erosion pumping sizing device that main passive protection according to claim 3 combines, feature
It is, pumping slurry leg (5) tube bottom is coniform.
8. the large diameter pile foundation protection against erosion pumping sizing device that main passive protection according to claim 3 combines, feature
It is, the mode that the multi-functional tube (3) and connecting tube (4) can be connected through a screw thread fixed corresponding lid is closed
Nozzle.
9. the large diameter pile foundation protection against erosion pumping sizing device that main passive protection according to claim 3 combines, feature
It is, the pumping sizing device further includes soil body resistivity measurement device (14), and setting is on taking out slurry leg (5).
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| CN112709213A (en) * | 2020-12-31 | 2021-04-27 | 湖南大学 | Method and device for curing top of gravel pile based on MICP technology |
| CN113373965A (en) * | 2021-07-30 | 2021-09-10 | 中国华能集团清洁能源技术研究院有限公司 | Offshore wind power single-pile foundation device capable of preventing scouring |
| CN113718823A (en) * | 2021-09-16 | 2021-11-30 | 中国华能集团清洁能源技术研究院有限公司 | Offshore wind power foundation |
| CN115387362A (en) * | 2022-08-23 | 2022-11-25 | 枣庄学院 | Full-section anti-skid cut-off wall for treating giant landslide |
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