The fluid injection of vacuum bellows is pressurized joint grouting and reinforcing super soft ground fluid injection supercharging device
The utility model provides one kind in weak soil, super soft ground processing method, the vacuum preloading belonged in Geotechnical Engineering
With composite foundation joint processing technology.
In the last few years, because land resources is in short supply, reclamation engineering receives increasing attention, vacuum method
As a kind of common method for processing foundation, it is widely applied in reclamation engineering.Conventional vacuum method is soft
Soil primary surface laying sand bedding course, sets plastic draining board or sand drain, then make itself and atmospheric isolation, diaphragm seal end with close membrane
Pile things on processing is carried out with soil, by being embedded in the drainage pipeline of sand bedding course, is evacuated using vavuum pump or other vacuum means,
Under negative pressure of vacuum effect, negative pressure is gradually formed in earth's surface sand bedding course and vertical drainage passage, while inside soil body leads to draining
Pressure differential is formed between road, bed course, under this differential pressure action, the pore water around drain bar in weak soil is constantly arranged by drainage channel
Go out, due to the dissipation of soil body Pore Pressure, effective stress increases therewith, and the soil body gradually consolidates, and intensity also can be carried correspondingly
It is high.
As reclamation engineering is to " waters, particulate, efficiently " development, on the basis of traditional vacuum pre-press reinforcing processing
There is various types of corrective measures and method, such as without the in line technique of soft soil foundation treatment of sand, air pressure splitting technique of soft soil foundation treatment, note
Gas supercharging technique of soft soil foundation treatment, electric osmose combined vacuum prestressing technology, preloading combined vacuum prestressing technology etc., these improved technologies exist
Certain effect is achieved in engineer applied.
Although improvement after vacuum preloading method can improve soil stabilization to a certain extent, still suffer from compared with
The shortcomings that more：
1) for super soft ground, when carrying out consolidation process using vacuum preloading method, generally displacement early stage
Larger, drainage effect is obvious, to later stage drain bar near particulate mud plug drain bar, vacuum also declines therewith,
Cause later stage drainage rates to be decreased obviously, especially apart from drain bar remotely and deep layer the soil body do not obtain fully plus
Gu this has had a strong impact on Foundation Treatment Effect.
2) although it is pre- to improve vacuum to a certain extent for the novel evacuated prestressing technology such as electric osmose combined vacuum prestressing technology
The drainage efficiency of pressure and then soil solidifying speed is accelerated, but this methods engineering cost is higher, is difficult to enter in Practical Project
Row is widely applied.
3) stiffening basic ground is carried out using air pressure splitting vacuum preloading and injecting gas boosting technique of soft soil foundation treatment, in engineering
Found in practical application, however open close pressure inlet of crossing blasts air into soil, just can guarantee that stable draught head, once stop gas
Body is supplied, negative pressure of vacuum reduces, and drainage rates decline immediately, causes soil stabilization not good enough, especially deep ground earth
Consolidation process effect is not fully up to expectations.
Utility model content
The purpose of this utility model is to overcome the above-mentioned deficiency of prior art, there is provided one kind can be applied to weak soil, super
The fluid injection pressure charging system of the vacuum pre-press reinforcing processing system of Soft Ground, using the utility model, it can not only ensure
Steady pressure between drain bar and foundation soil is poor, improves vacuum preloading discharging consolidation speed, moreover it is possible to enter one by later stage slip casting
Step improves soil strength.The technical solution of the utility model is as follows：
A kind of vacuum bellows fluid injection is pressurized joint grouting and reinforcing super soft ground fluid injection supercharging device, for weak soil, surpass
In the vacuum pre-press reinforcing processing system that soft soil foundation is handled, described vacuum pre-press reinforcing processing system includes multiple perpendicular
To drain bar 9, it is characterised in that
Described fluid injection supercharging device includes fluid injection supercharging capsule 10, horizontal fluid injection supercharging branch pipe 6, Water filling valve 4, three and connected
Head, horizontal fluid injection supercharging supervisor 13 and fluid injection supercharging equipment 1, wherein the main body of fluid injection supercharging capsule 10 is that can transmit liquid
The elastic sack body of body pressure, fluid injection seal 5 is provided with the top of elastic sack body, top both sides are communicated with water injection pipe 11, and lead to
Cross water injection pipe 11 and be connected to horizontal fluid injection supercharging branch pipe 6, Water filling valve 4, each horizontal stroke are provided with horizontal fluid injection supercharging branch pipe 6
Branch pipe 6 is pressurized by being connected by horizontal fluid injection supercharging supervisor 13 with fluid injection supercharging equipment 1 to fluid injection, and vertical drainage plate 9 divides
Cloth is on the periphery of fluid injection supercharging capsule 10；When carrying out mortar depositing construction, Grouting Pipe 15 is inserted with elastic sack body.
Preferably, the buried depth of fluid injection supercharging capsule is higher than the insertion depth 0.5-1m of vertical drainage plate.
Operation principle of the present utility model is:Conventional vacuum preloading method is improved first, by vaccum-pumping equipment to
While soil body applying vacuum negative pressure, moisture is injected into the fluid injection supercharging capsule set in advance, capsule is pressurized to surrounding by fluid injection
The soil body transmits hydraulic pressure, significantly increases the pressure differential between drain bar and foundation soil, and then improves the draining speed of soft soil foundation
Rate, depth layer soil body is promoted to complete discharging consolidation.After vacuum liquid filling supercharging terminates, it is pressurized in capsule to fluid injection and is noted by Grouting Pipe
Enter cement grout, so as to form a grouting and reinforcing body stake, be pressed further by the soil body of surrounding, the hole in densification surrounding soil
Gap, pore water unnecessary in the soil body is expelled from, improves the effective stress of weak soil, change soil body physico-mechanical properties, strengthened
The intensity of deep soil, and then improve the bearing capacity of soft soil foundation.So as to realize association of the two methods in same place
Same reinforcement effect.
The utility model is directed to conventional vacuum pre-pressed soft soil foundation reinforcement technique feature, compared with prior art with following
1 construction method is simple and easy, easy for construction, while construction quality is ensured, can substantially speed up soft soil foundation
2 is more close with conventional vacuum preloading method, and fluid injection supercharging technology can be significantly increased between drain bar and foundation soil
Pressure differential, and can continue to ensure stable pressure differential, accelerate draining simultaneously be more beneficial for pore pressure dissipation, accelerate soft soil foundation
Consolidation rate, improve efficiency of construction.
3 after vacuum liquid filling pressurization stages terminate, and directly can carry out deep layer slip casting in fluid injection supercharging Nang Chu, increase soft
Native foundation treatment depth, soft soil foundation bearing capacity is further enhanced, realize deep shallow layer soft soil foundation synchronization process simultaneously.
Two effects：First, use boost mode of the liquid as vacuum preloading, improve pressure differential, accelerate rate of consolidation and
Effect；Second, using bellows priming device after vacuum pre-press reinforcing processing is completed, further slip casting form compound foundation is carried out
Stiffening basic ground, reach the efficient combination of two kinds of consolidation effects of Same Site and permanent consolidation process effect, can be achieved shallow
Layer weak soil or depth layer joint reinforcement processing intent.
Brief description of the drawings
Fig. 1 is the overall structure diagram of vacuum pre-press reinforcing processing system.
Fig. 2 is that transverse drainage system and horizontal fluid injection are pressurized system schematic diagram.
Fig. 3 is that fluid injection is pressurized capsule organigram.
Fig. 4 is that vertical drainage plate and vertical fluid injection are pressurized system and arrange schematic diagram.
Label declaration in figure:1st, fluid injection supercharging equipment；2nd, vaccum-pumping equipment；3rd, sealing system；4 Water filling valves；5th, fluid injection
Seal；6th, horizontal fluid injection supercharging branch pipe；7th, horizontal branch；8th, bowknot；9th, vertical drainage plate；10th, fluid injection supercharging capsule；
11st, water injection pipe；12nd, three-way connection；13rd, horizontal fluid injection supercharging supervisor；14th, transverse drainage is responsible for；15th, Grouting Pipe.
Referring to Fig. 1-4, vacuum liquid filling supercharging joint deep layer injected foundation processing method, used drainage system includes perpendicular
To drain bar 9, bowknot 8, horizontal branch 7, the transverse drainage of three-way connection 12 supervisor 14 and vaccum-pumping equipment 2, wherein perpendicular
It is connected and connects with horizontal branch 7 by bowknot 8 to drain bar 9, horizontal branch 14 is further through three-way connection 12
It is connected with transverse drainage supervisor 14, transverse drainage supervisor 14 finally connects with vaccum-pumping equipment 2.Wherein, vertical drainage plate 9 is by just
Square arrangement, lays deep layer fluid injection supercharging capsule 10, the spacing 0.8-2.0m of vertical drainage plate 9 at the center of square, and fluid injection increases
The buried depth of capsule 10 is pressed to be higher than the insertion depth 0.5-1m of vertical drainage plate.
Fluid injection supercharging device include fluid injection supercharging capsule 10, horizontal fluid injection supercharging branch pipe 6, Water filling valve 4, three-way connection 12,
Horizontal fluid injection supercharging supervisor 13 and fluid injection supercharging equipment 1.Wherein described fluid injection supercharging capsule 10 is made up of lightweight latex material, can
To transmit fluid pressure, fluid injection supercharging capsule 10 top both sides are equipped with water injection pipe 11, and connect horizontal fluid injection by water injection pipe 11 and increase
Press branch pipe 6.Horizontal fluid injection supercharging branch pipe 6 end is equipped with Water filling valve 4, and wherein Water filling valve 4 is connected with fluid injection supercharging equipment 1
It is logical.Enough water is pre-charged with the fluid injection supercharging equipment 1, is treated in soil after vacustat, opens fluid injection supercharging equipment
1, fluid injection seal 5 is closed, while open Water filling valve 4, water 1 passes sequentially through horizontal fluid injection supercharging master from fluid injection supercharging equipment
Pipe 13, horizontal fluid injection supercharging branch pipe 6 are injected into fluid injection supercharging capsule 10, and then the soil body near fluid injection supercharging capsule 10 is received and applied
The extra liquid pressure added, the pressure differential between drain bar and foundation soil is increased, this pressure differential is relatively stable, so as to improve
The discharging consolidation speed of vacuum preloading, after supercharging to be injected terminates, Water filling valve 4 is closed, simultaneously close off fluid injection supercharging and set
After vacuum liquid filling supercharging construction terminates, the fluid injection seal 5 that fluid injection supercharging capsule 10 top is set is opened, is increased to fluid injection
Press and Grouting Pipe 15 is inserted in capsule 10, and the cement grout being stirred in advance is injected into Grouting Pipe 15, slurries are filled into fluid injection increasing
After pressing capsule 10, because the density of water is less than serum density, water will be discharged by fluid injection seal 5, and material is thus formed a note
Reinforcing body stake is starched, while with the soil body for being pressed further by surrounding of slip casting, also changes soil body physico-mechanical properties, carries
The high bearing capacity of soft soil foundation.Wherein Grouting Pipe 15 can be from main regulation height.
Whole vacuum liquid filling supercharging combines method for processing foundation with deep layer slip casting, comprises the following steps:
First, it is the arrangement of apparatus first with connecting.After weak soil or ultra-soft soil top layer lay one layer of woven cloth, it
After set vertical drainage plate 9 and vertical fluid injection supercharging capsule 10, vertical drainage plate 9 is connected with horizontal branch 7, general transverse direction
Branch drain 7 and transverse drainage supervisor 14 connects, and vertical fluid injection is pressurized into capsule 10 and horizontal fluid injection afterwards is pressurized branch pipe 6, laterally
UNICOM, two layers of woven cloth of laying, one layer of geotextiles, one layer of diaphragm seal form sealing system 3 to fluid injection supercharging supervisor 13 successively, finally
Transverse drainage supervisor 14 is assembled with vaccum-pumping equipment 2, horizontal fluid injection supercharging supervisor 13 and the UNICOM of fluid injection supercharging equipment 1.
2nd, vacuum liquid filling pressurization stages.Vaccum-pumping equipment 2 is opened, after the vacustat in barged-in fill, opens water filling
Valve 4, opens fluid injection supercharging equipment 1, and water is pressurized system by horizontal fluid injection and is injected into fluid injection supercharging capsule 10, fluid injection is pressurized
The soil body around capsule 10 applies hydraulic pressure, increases the pressure differential between drain bar and foundation soil, and then improve the row of soft soil foundation
Water speed rate, depth layer soil body is promoted to complete discharging consolidation.
3rd, after vacuum liquid filling pressurization stages terminate, fluid injection supercharging equipment 1 is closed down, simultaneously closes off Water filling valve 4, simultaneously
The fluid injection seal 5 that fluid injection supercharging capsule 10 top is set is opened, is pressurized to fluid injection in capsule 10 and inserts Grouting Pipe 15, and to Grouting Pipe
The cement grout being stirred in advance is injected in 15, because the density of water is less than serum density, water will pass through the row of fluid injection seal 5
Go out, after slurries are filled into fluid injection supercharging capsule 10, form a slip casting pile body, enhance the intensity of deep soil, improve
The bearing capacity of soft soil foundation.
4th, after reinforced soft soil ground effect produces a desired effect, withdrawing for vacuum unloading and equipment is carried out.