CN103866760A - Method and device for accelerating ultra-soft soil solidification through dual-passage variable-polarity vacuum electroosmosis - Google Patents
Method and device for accelerating ultra-soft soil solidification through dual-passage variable-polarity vacuum electroosmosis Download PDFInfo
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Abstract
The invention relates to a method and a device for accelerating ultra-soft soil solidification through dual-passage variable-polarity vacuum electroosmosis. The method comprises the following steps: 1) laying a geotextile; 2) inserting composite drainage plates in rows; 3) laying a dual-passage closed vacuum drainage PVC (Polyvinyl Chloride) main pipe and branch pipes; 4) connecting the composite drainage plates with the branch pipes by using closed quick plate and pipe connectors which can be connected with conducting wires; 5) serially connecting the composite drainage plates by using electroosmosis conducting wires to form an electroosmosis electrode array and laying a vacuum membrane; 6) starting a vacuum electroosmosis combined working mode and dynamically controlling polarity variation of a vacuum drainage main valve and composite drainage plates according to parameters such as water output. The device comprises the composite drainage plates, dual-passage vacuum pre-pressing drainage main and branch pipes and an electroosmosis variable-polarity system. The method and the device for accelerating ultra-soft soil solidification through dual-passage variable-polarity vacuum electroosmosis have the remarkable advantages that the effective superposition for facilitating water migration through the production of a vacuum pressure field and an electric field is realized, the loss of a single anode is reduced, the energy consumption per unit time is reduced, the drainage and solidification efficiency is improved by 2-5 times, the construction is simple and convenient to perform, the load time is short and the cost is saved.
Description
Technical field
The invention belongs to ultra-soft silt soil discharging consolidation foundation treatment technology field, more specifically relate to a kind of binary channels and can accelerate ultra-soft silt soil discharging consolidation method for processing foundation by pole-changing vacuum electroosmosis, also relate to a kind of binary channels simultaneously and can pole-changing vacuum electroosmosis accelerate the device of ultra-soft silt soil discharging consolidation ground processing, the method and device are not only applicable to all kinds of highly sensitive saturated soft clay foundations and reinforce, and reinforce when being particularly useful in deep layer take ultra-fine grain as the extremely low all kinds of dredging silt barged-in fill grounds of main and initial bearing capacity and shallow-layer gamut.
Background technology
Ultra-soft silt soil be generally dredging silt by basin and navigation channel through waterpower hydraulic reclamation within cofferdam and form, this class soil has following feature: 1, moisture content is generally up to more than 90%, if blast-filled ground can be up to 170% left and right recently; 2, glutinous grain content is high, and particle diameter is less than accounting 50% left and right of 0.005m conventionally; 3 because glutinous grain content is high, and transmission coefficient is very low, is generally less than 10
-6cm/s; 4, a little less than connecting very between this type of soil particle, be flocculence mud scum state, soil skeleton structure not yet forms, and mobility is strong, and intensity and bearing capacity are extremely low.
Due in recent years, Engineering Construction Land-Occupation is gradually nervous, and in order to alleviate the contradiction of land supply, the processing of this type of super soft foundation has become a ring important in engineering construction, and how fast, efficiently, economically its core technology difficult problem is to process reinforcing.
The above-mentioned characteristic of ultra-soft silt soil, has run into the difficulty or the shortcoming that are difficult to overcome while causing adopting conventional softer base reinforcing technique to be processed.Main difficulty following points: 1. pending ultra-soft silt soil work plane cannot be gone up people or plant equipment; 2. because transmission coefficient is extremely low, cause traditional vacuum pre-pressure drainage consolidation method drainage efficiency low, cause the load duration long, specific energy consumption is large; 3. owing to cannot adopting sand cushion, cause the transmission efficiency of vacuum low, can only form the crust layer that is less than 1m on top layer, process deep layer weak soil, need second consolidation processing; 4. while adopting band drain to make vertical drainage passage, plate body very easily forms the earth pillar that compactness is relatively high around, and now the transmission coefficient of the soil body is reduced to 10
-8cm/s, even 10
-9cm/s, can be referred to as " enclosing inhibition effect ", and this effect causes the drainage efficiency of vacuum prepressing system to reduce, and energy loss increases.
At present institute can only consider for above-mentioned certain difficult point processing in the method for ultra-soft silt soil discharging consolidation reinforcing, as number of patent application for CN 200710031221.5(patent publication No. be CN 100554596C) and the method that adopted for CN 201210157858.X (patent publication No. is CN103422490A) of number of patent application for without sand cushion vacuum preloading, it is mainly the problem that cannot go up people or plant equipment for pending ultra-soft silt soil work plane, but same existence is high for glutinous grain content, the ultra-soft silt soil drainage efficiency that transmission coefficient is extremely low is low, band drain " enclosing inhibition effect " is around also obvious, there is the vacuum load duration long (being generally more than 90 days), the problems such as unit interval energy consumption is large, and also can only form the top layer crust layer that is less than 1m, supporting capacity is also very limited.For another example, the method that patent publication No. adopts for CN101831903B is to utilize electrical bar and sand drain electrical bar to accelerate drainage efficiency, although the method can improve the drainage efficiency of ultra-soft silt soil to a certain extent, but energy consumption is larger, and be unwell to the processing that contains humus or organic silt soil.
Electroosmotic drainage has been proved can effectively reinforce the roadbed of alluvial silt that transmission coefficient is lower, its major advantage be exactly by the pore water in the soil body under electric field driven by anode to cathode flow, and the mobile of pore water is subject to the impact of soil particle size very little.Traditional electroosmotic drainage energy consumption is large, construction costs is high, therefore fails large scale application.According to the feature of independent vacuum and independent electric osmose, be a kind of feasible method by vacuum and electric osmose in conjunction with processing ultra-soft sludge soil base.
Equally also be there is to difficult point in conjunction with processing ultra-soft sludge soil base in vacuum and electric osmose, the one, the anode loss in electric osmose process is large, the anode adopting is at present mainly take reinforcing bar as main, as patent publication No. for the method that CN100443668C, CN101225658B adopted be all using reinforcing bar or metal as anode, after such anodal closure, can produce comparatively serious loss, even can cause anode fracture, electric osmose effect is had a greatly reduced quality; The 2nd, when ultra-soft sludge soil base is processed in vacuum and electric osmose combination, ground inside is in four complicated environment, as the Vacuum Pressure field of force, seepage field, electric field, thermal field.If simply vacuum and electric osmose will certainly be produced to the energy offset effect such as the Vacuum Pressure field of force and electric field in conjunction with (if patent publication No. is CN 101182709 B, CN 101182708 B), thereby cause drainage efficiency to reduce, energy consumption improves.In addition, in the method that patent publication No. adopts for CN 101182709 B, CN 101182708 B, need early stage ground on the scene to use tapping equipment, be not suitable for the processing of ultra-soft sludge soil base.
In sum, in conjunction with in electroosmosis method, there is following shortcoming in vacuum before the present invention.1. anode loss is large, causes cost to increase, and negative electrode " encloses inhibition effect " obviously, greatly affects electric osmose effect; 2. just by vacuum and the simple combination of electric osmose, do not consider the energy offset effect of the Vacuum Pressure field of force and electric field, cause drainage efficiency to reduce, 3. unit interval energy consumption improves conductive electrode conventionally on diaphragm seal, need to perforate on diaphragm seal, sealing is poor, easy to leak.4. the transmission efficiency of vacuum is low, process deep layer weak soil, needs second consolidation processing.
In order to overcome above-mentioned 4 major defects and the deficiency in previous vacuum electroosmosis processing method, be necessary to design a kind of effect that can have and reduce the loss of single anode, reduce unit interval energy consumption, avoid " enclosing inhibition effect ", good airproof performance, vacuum transmission efficiency is high, improves discharging consolidation efficiency, simultaneously the method and apparatus of shallow-layer and deep layer soil stabilization.
Summary of the invention
The object of the invention is to be to provide a kind of binary channels to accelerate the method for super soft soil consolidation by pole-changing vacuum electroosmosis, easy to implement the method, easy and simple to handle, effectively reduce the loss of single anode, reduce unit interval energy consumption, avoid " enclosing inhibition effect ", good airproof performance, vacuum transmission efficiency is high, discharging consolidation efficiency several times are improved, and can reinforce shallow-layer and deep soil body method simultaneously, the method is not only applicable to all kinds of highly sensitive saturated soft clay foundations and reinforces, and reinforce when being particularly useful in deep layer take ultra-fine grain as the extremely low all kinds of dredging silt barged-in fill grounds of main and initial bearing capacity and shallow-layer gamut, more can meet the demand of Practical Project.
Another object of the present invention is to be to provide a kind of binary channels can pole-changing vacuum electroosmosis to accelerate the device of super soft soil consolidation, this device project organization is simple, easy and simple to handle, good stability, respectively to organize member durable in use, be difficult for consume, practical, and can be according to real-time reinforcing situation configuration real-time transform polarity and the drainage channel of the soil body, drainage efficiency is high, and flexibility ratio and strong adaptability, be with a wide range of applications.
To achieve these goals, the present invention adopts following technical measures:
Binary channels can be accelerated a method for super soft soil consolidation by pole-changing vacuum electroosmosis, the steps include:
1. on pending ultra-soft silt soil place, by the mode laying geotextile of cystosepiment or pontoon bridge;
2. in a row insert composite water draining board as depth direction drainage system, and make composite water draining board just exposure on geotextile;
3. lay binary channels vacuum drainage supervisor according to design pitch, i.e. sealed vacuum draining PVC supervisor's first and sealed vacuum draining PVC supervisor second, described spacing is 2 ~ 50m;
4. lay the withstand voltage ripple arm of sealed vacuum draining according to design pitch, described spacing is 0.5 ~ 10m, the arm of wearing supervisor is arranged with the branch interval that is connected supervisor, be connected in sealed vacuum draining PVC supervisor's first or sealed vacuum draining PVC supervisor second according to design;
5. in composite water draining board exposure position, with connecing the quick plate tube connector of lead-type closed, withstand voltage to composite water draining board and sealed vacuum draining ripple arm is connected, forms horizontal-vertical-dark closed vacuum prepressing water discharge system;
6. use electric osmose wire that same row's composite water draining board is connected in series and forms electroosmosis electrode sequence in a row, the access in parallel of the single sequence of the composite water draining board respectively interval one arranged can pole-changing electric osmose system negative electrode or anode, by single adjacent composite water draining board sequence access respectively can pole-changing electric osmose system male or female, verify the mode of connection, guarantee that every composite water draining board is all in place in circuit, the polarity of electrode that adjacent single sequence accesses is contrary; After completing above-mentioned steps, lay vacuum diaphragm;
7. open vacuum electroosmosis associated working Mode A, the by-pass valve control of sealed vacuum draining PVC supervisor first is opened, the by-pass valve control of sealed vacuum draining PVC supervisor second closes, and the described vacuum electroosmosis associated working Mode A duration is 0.2 ~ 96 hour;
8. when the water yield in electric current, the wide viscosity type turbine flowmeter showing in can pole-changing electric osmose system obviously reduces, adjustment can pole-changing electric osmose system, make the reversal of composite water draining board, make sealed vacuum draining PVC supervisor first by-pass valve control pass and sealed vacuum draining PVC supervisor second by-pass valve control open simultaneously, enter vacuum electroosmosis associated working Mode B, the described vacuum electroosmosis associated working Mode B duration is 0.2 ~ 96 hour;
9. when the electric current showing in can pole-changing electric osmose system, the water yield of wide viscosity type turbine flowmeter obviously reduce again, then switch to vacuum electroosmosis associated working Mode A, the described time interval is 0.2 ~ 96 hour;
10. by this 7. 8. 9. mode periodic duty of step, until the shallow-layer in ultra-soft silt soil region and the soil moisture content of deep layer decline, static sounding and vane-shear reach expection requirement, unloading, and the duration is 10 ~ 35 days.
operating principle of the present invention:
Binary channels can be accelerated ultra-soft silt soil discharging consolidation method for processing foundation by pole-changing vacuum electroosmosis, its principle is simultaneously in pending ultra-soft silt soil region, superposition of electric field, thermal field, the Vacuum Pressure field of force, seepage field simultaneously, wherein, the effect of electric field is to make pore water produce ionization and electric osmose electroosmosis, accelerates the migration rate of moisture in hyposmosis coefficient silt soil; In galvanization, the temperature of the soil body and pore water can improve along with the growth of conduction time, thereby improves the activity of pore water intermediate ion, again accelerates the migration of moisture; The interaction energy in the Vacuum Pressure field of force is discharged pore water fast from vertical drainage passage.And can dynamically control the conversion of electric field and the Vacuum Pressure field of force in the soil body, produce to realize the Vacuum Pressure field of force and electric field " the effectively stack " that be conducive to water translocation, thereby accelerate the discharge of ultra-soft silt soil pore water, increase effective stress, reduce soil body hole, thereby reach the object of fast effective consolidated earth mass.
The device that a kind of binary channels can pole-changing vacuum electroosmosis be accelerated the method for super soft soil consolidation, it is by composite water draining board, fastening bolt (being also used as wire joining), snap joint buckle, electric osmose wire, composite water draining board inner core, long fine heat is pricked the filter membrane that nonwoven is wrapped to form, can connect the quick plate tube connector of lead-type closed, wire passes hole, Rapid fastener access groove, sealed vacuum draining is withstand voltage ripple arm, under wear supervisor's arm, connect supervisor's arm, sealed vacuum draining PVC is responsible for first, sealed vacuum draining PVC is responsible for second, the by-pass valve control of vacuum drainage supervisor first, the by-pass valve control of vacuum drainage supervisor second, master control valve, vacuum pump, can pole-changing electric osmose system (conventional AC-DC converter, phased dc source able to programme, stabilizator, reversal loop apparatus, current/voltage shows register, city's field energy is purchased accessory and is combined), positive wire, cathode wire, PVC tee piece, wide viscosity type turbine flowmeter composition.It is characterized in that: composite water draining board fastening bolt is connected with snap joint buckle, the filter membrane again fastening bolt being wrapped to form through long fine heat bundle nonwoven is connected with composite water draining board inner core, and by electric osmose wire access fastening bolt, snap joint buckle is inserted and in Rapid fastener access groove, makes it and can connect the quick plate tube connector of lead-type closed and be connected, and electric osmose wire is passed to hole through wire, again by the electric osmose wire jointed anode wire of drawing with row's composite water draining board, again by positive wire be linked into can the positive pole of pole-changing electric osmose system in, in addition by adjacent row's electric osmose wire by cathode wire be linked into can the negative pole of pole-changing electric osmose system in, connect the withstand voltage ripple arm of sealed vacuum draining and (under comprising, wear supervisor's arm with the above-mentioned quick plate tube connector of lead-type closed that connects, connect supervisor's arm), again by under wear supervisor arm be linked in sealed vacuum draining PVC supervisor second, adjacent row's connection supervisor's arm is linked into sealed vacuum draining PVC supervisor first, blank area is noted with sealings such as glass cements in case leak-stopping gas, what wherein need confirmation is, when the by-pass valve control of sealed vacuum draining PVC supervisor first is opened, and when the by-pass valve control of sealed vacuum draining PVC supervisor second is closed, on the withstand voltage ripple arm of sealed vacuum draining being connected with sealed vacuum draining PVC supervisor first, the polarization state of all composite water draining boards is negative electrode, equally, when the by-pass valve control of sealed vacuum draining PVC supervisor second is opened and when the by-pass valve control of sealed vacuum draining PVC supervisor first is closed, on the withstand voltage ripple arm of sealed vacuum draining being connected with sealed vacuum draining PVC supervisor second, the polarization state of all composite water draining boards is negative electrode, sealed vacuum draining PVC supervisor first is connected vacuum pump with sealed vacuum draining PVC supervisor second by PVC tee piece and wide viscosity type turbine flowmeter, and master control valve is linked in PVC tee piece.Above-mentioned feature connection features has formed horizontal stroke-vertical-dark closed vacuum electric osmose that binary channels can pole-changing and has accelerated ultra-soft soil consolidation system.
Described composite water draining board, it is compounded with conductive black, metal dust (silver, copper, aluminium, zinc, iron, nickel etc. all can) and wire in polypropylene and polyethylene material as inner core, outside filter membrane adopts long fine heat to prick nonwoven and is wrapped to form, as shown in Figure 3, Figure 4, composite water draining board is connected with the quick plate tube connector of connect lead-type closed in vacuum preloading drainage system by snap joint buckle the concrete structure of band drain.The degree of depth that composite plate generally can be inserted weak soil is in 35m, processes darker Soft Soil Layer as need, the inner core size of composite plate need be adjusted.
Described electric osmose pole-changing system and device, it comprises AC-DC converter (conventional AC-DC converter, market all can be purchased), phased dc source able to programme, stabilizator (direct current stabilizer, market all can be purchased), reversal loop apparatus (both positive and negative polarity alteration switch, city's field energy is purchased accessory and is combined), current/voltage shows register (conventional liquid crystal panel, market all can be purchased) etc., current/voltage shows that register provides current/voltage parameter, when current/voltage parameter reaches threshold value, reversal loop changes the polarity that connects composite water draining board on electric osmose device, above-mentioned electric osmose pole-changing system is positioned in professional switchbox (can arbitrarily place herein, do not do requirement, depending on the space size of above-mentioned parts and arrange),
Described binary channels is (containing first, two passages of second) vacuum preloading and drainage system device, by vacuum pump (vacuum jet pump or mechanical pump all can), PVC tee piece, wide viscosity type turbine flowmeter (wide viscosity type, can buy in market), by-pass valve control (the conventional ball valve of sealed vacuum draining PVC supervisor first, can buy in market), by-pass valve control (the conventional ball valve of sealed vacuum draining PVC supervisor second, can buy in market), sealed vacuum draining PVC supervisor, sealed vacuum draining is withstand voltage, and ripple arm (includes steel wire reinforcing, can buy in market), composite water draining board (ditto described), can connect the quick plate tube connector of lead-type closed (containing Rapid fastener access groove and wire guide, can buy in market customization) composition.Wherein composite water draining board is connected with snap joint buckle with fastening bolt, the filter membrane again fastening bolt being wrapped to form through long fine heat bundle nonwoven is connected with composite water draining board inner core, and by electric osmose wire access fastening bolt, again snap joint buckle is inserted and in Rapid fastener access groove, make composite water draining board and can connect the quick plate tube connector of lead-type closed and be connected, (under comprising, wear supervisor's arm with the above-mentioned withstand voltage ripple arm of the quick plate tube connector connection sealed vacuum draining of lead-type closed that connects again, connect supervisor's arm), again by under wear supervisor arm be linked in sealed vacuum draining PVC supervisor second, adjacent row's connection supervisor's arm is linked into sealed vacuum draining PVC supervisor first, blank area is noted with sealings such as glass cements in case leak-stopping gas.Sealed vacuum draining PVC supervisor first is connected vacuum pump with sealed vacuum draining PVC supervisor second by PVC tee piece and wide viscosity type turbine flowmeter, and master control valve is linked in PVC tee piece.
the present invention has the following advantages and good effect:
1) adopt composite water draining board, band drain is compounded with conductive black, metal dust (silver, copper, aluminium, zinc, iron, nickel etc. all can) and wire are in polypropylene and polyethylene material, filter membrane adopts long fine heat to prick nonwoven and is wrapped to form, there is good electrical conductance, wear-resistant, water-fast soaking property, seepage of water and the feature of environmental protection, it can replace traditional common plastics band drain and metal electrode, can realize the multiple function of negative pressure transmission, draining, the moon or anode simultaneously;
2) band drain construction need perforate on diaphragm seal, good airproof performance, be characterized in negative pressure directly by pipeline and band drain to deep layer transmission, vacuum is very little along depth direction loss;
3) designed the supporting pole-changing system of twin-channel vacuum electroosmosis, at the same time under the condition of vacuum preloading and electric osmose, can dynamically control the conversion of electric field and the Vacuum Pressure field of force in the soil body, make the Vacuum Pressure field of force and electric field generation be conducive to " the effectively stack " of water translocation, reduce or avoid energy offset effect, the in the situation that of same units energy consumption, can make water translocation speed improve several times;
4) once reinforce and can process deep layer weak soil, more than shallow-layer and deep layer bearing capacity all can reach 80kPa;
5) adopt said system can effectively reduce single anode loss, reduce specific energy consumption, avoid " enclosing inhibition effect ", improve discharging consolidation efficiency, have that ground is processed evenly, easy construction, load time be short, the clear superiority of economy.
In a word, binary channels of the present invention can pole-changing vacuum electroosmosis be accelerated method and the device of super soft soil consolidation, can process easily and flexibly all kinds of ultra-soft silt soils such as different water cut, a different glutinous content.And except the processing of ultra-soft silt soil discharging consolidation ground is accelerated in vacuum electroosmosis integration of operation simultaneously, also can carry out the difference separate operaton of traditional vacuum, electric osmose, or first vacuum preloading, the integration of operation of final vacuum electric osmose, applied widely, easy and simple to handle.
Accompanying drawing explanation
Fig. 1 be a kind of binary channels can pole-changing vacuum electroosmosis and drainage system mode of operation A(first passage open, second passage closes, electric osmose is opened) schematic diagram;
Fig. 2 be a kind of binary channels can pole-changing vacuum electroosmosis and drainage system mode of operation B(second passage open, first passage closes, electric osmose is opened) schematic diagram;
Fig. 3 is a kind of composite water draining board (containing snap joint) schematic diagram that connects the quick plate tube connector of lead-type closed and connection;
Fig. 4 is a kind of composite water draining board and snap joint buckle sectional view;
Fig. 5 is that in a kind of mode of operation A, arm is arranged A-A schematic cross-section with supervisor;
Binary channels can be accelerated the description of symbols in ultra-soft silt soil discharging consolidation method for processing foundation accompanying drawing by pole-changing vacuum electroosmosis: 1-composite water draining board; 1a-fastening bolt (being also used as wire joining); 1b-snap joint buckle; 1c-electric osmose wire; 1d-composite water draining board inner core; The long fine heat of 1e-is pricked the filter membrane that nonwoven is wrapped to form; 2-can connect the quick plate tube connector of lead-type closed (being formed by the additional Rapid fastener access groove of common plastics plate tube connector and wire guide, customizable); 2a-wire passes hole 2b-Rapid fastener access groove, and the draining of 3-sealed vacuum is withstand voltage, and ripple arm (is worn supervisor's arm under 3a-; 3b-connects supervisor's arm); 4-sealed vacuum draining PVC is responsible for (first); 5-sealed vacuum draining PVC is responsible for second; The by-pass valve control (ball valve) of 6-vacuum drainage supervisor first; The by-pass valve control (ball valve) of 7-vacuum drainage supervisor second; 8-master control valve (ball valve); 9-vacuum pump (vacuum jet pump or mechanical pump all can); 10-can pole-changing electric osmose system (conventional AC-DC converter, phased dc source able to programme, stabilizator, reversal loop apparatus, current/voltage shows register, city's field energy is purchased accessory and is combined); 11-positive wire; 12-cathode wire; 13-PVC tee piece; The wide viscosity type of 13a-turbine flowmeter (wide viscosity type, can buy in market).
the specific embodiment:
The present invention is further described the specific embodiment in conjunction with the accompanying drawings and embodiments.
embodiment 1:
Be positioned at hydraulic reclamation district, Ezhou, Hubei, hydraulic reclamation mean depth is about 3 ~ 6m.Recently to have moisture content high for blowing-filling sludge, and compressibilty is large, bad hydraulic permeability, the initial extremely low feature of bearing capacity.Process front trial zone soil soil moisture content and be greater than 150%, wet density 1.43g/cm
3, liquid limit 92.6%, plastic limit 39.1%; Particle composition is greater than 0.075mm accounting 2.7%, and 0.075mm ~ 0.005mm accounting 52.1%, is less than 0.005mm accounting 45.2%; This blowing-filling sludge soil is flow regime, and initial bearing capacity, close to 0, uses as ground after need to processing, and requires to process groundwork bearing capacity and is greater than 55kPa, except forming the shallow-layer crust layer of 1m left and right, also requires reinforcement depth to be at least 2m.
binary channels can be accelerated a method for super soft soil consolidation by pole-changing vacuum electroosmosis, the steps include:
1. on pending ultra-soft silt soil place, by the mode laying geotextile of cystosepiment or other pontoon bridges;
2. in a row insert composite water draining board 1 as depth direction drainage system, and make composite water draining board 1 just exposure on geotextile;
3. lay sealed vacuum draining PVC supervisor's first 4 and sealed vacuum draining PVC supervisor second 5 according to design pitch; Described spacing be 2 or 5 or 10 or or 15 or 20 or 25 or 30 or 35 or 40 or 45 or ~ 50m;
4. lay the withstand voltage ripple arm 3 of sealed vacuum draining according to design pitch, the arm 3a that wears supervisor is arranged with the arm 3b interval that is connected supervisor, and be connected in sealed vacuum draining PVC supervisor's first 4 or sealed vacuum draining PVC supervisor second 5 according to the mode of Fig. 1 or Fig. 2; Described spacing be 0.5 or 1 or 2 or 3 or 4 or or 5 or 6 or 7 or 8 or 9 or 10m,
5. in the exposure position of composite water draining board 1, with connecing the quick plate tube connector 2 of lead-type closed, withstand voltage to composite water draining board 1 and sealed vacuum draining ripple arm 3 is connected, forms horizontal-vertical-dark closed vacuum prepressing water discharge system.
6. use electric osmose wire 1c that same row's composite water draining board 1 is connected in series and forms electroosmosis electrode sequence in a row; The access in parallel of the single sequence of the composite water draining board 1 respectively interval one arranged can pole-changing electric osmose system 10 negative electrode or anode, by single adjacent composite water draining board 1 sequence access respectively can pole-changing electric osmose system 10 male or female; Verify the mode of connection, guarantee that every composite water draining board is all in place in circuit, and guarantee that the polarity of electrode that adjacent single sequence accesses is contrary; After completing above-mentioned steps, lay vacuum diaphragm;
7. open vacuum electroosmosis associated working Mode A, the by-pass valve control 6 of sealed vacuum draining PVC supervisor first 4 is opened, the by-pass valve control 7 of sealed vacuum draining PVC supervisor second 5 closes, and it is 0.2 or 2 or 8 or 17 or 25 or 36 or 48 or 56 or 66 or 74 or 81 or 89 or 96 hour that described vacuum electroosmosis associated working Mode A is opened the duration;
8. when the water yield in electric current, the wide viscosity type turbine flowmeter 13a showing in can pole-changing electric osmose system 10 has obvious reduction, adjustment can pole-changing electric osmose system 10, make the reversal of composite water draining board 1, make sealed vacuum draining PVC supervisor first 4 by-pass valve controls 6 passes and sealed vacuum draining PVC supervisor second 5 by-pass valve controls 7 open simultaneously, enter vacuum electroosmosis associated working Mode B, the described vacuum electroosmosis associated working Mode B duration is 0.2 or 3 or 9 or 16 or 24 or 34 or 47 or 55 or 67 or 77 or 85 or 96 hour;
9. when the electric current showing in can pole-changing electric osmose system 10, the water yield of wide viscosity type turbine flowmeter 13a have obvious reduction again, switch to again vacuum electroosmosis associated working Mode A, the described time interval be 0.2 or 4 or 9 or 16 or 27 or 35 or 44 or 51 or 60 or 68 or 78 or 86 or or 96 hours;
10. by this 7. 8. 9. mode periodic duty of step, until the shallow-layer in ultra-soft silt soil region and the soil moisture content of deep layer are all decreased significantly, static sounding and vane-shear achievement reach expection requirement, can unload, and the duration is about 10 or 15 or 20 or 26 or 31 or 35 days.
Binary channels can pole-changing vacuum electroosmosis be accelerated a device for ultra-soft silt soil discharging consolidation ground processing, and it is by composite water draining board 1, fastening bolt 1a(is also used as wire joining), snap joint buckle 1b, electric osmose wire 1c, composite water draining board inner core 1d, long fine heat is pricked the filter membrane 1e that nonwoven is wrapped to form, the quick plate tube connector 2 of closed, wire passes hole 2a, Rapid fastener access groove 2b, sealed vacuum draining is withstand voltage ripple arm 3, under wear supervisor's arm 3a, connect supervisor's arm 3b, sealed vacuum draining PVC is responsible for first 4, sealed vacuum draining PVC is responsible for second 5, vacuum drainage supervisor first 4 by-pass valve controls 6, vacuum drainage supervisor second 5 by-pass valve controls 7, master control valve 8, vacuum pump 9, can pole-changing electric osmose system 10(conventional AC-DC converter, phased dc source able to programme, stabilizator, reversal loop apparatus, current/voltage shows register, city's field energy is purchased accessory and is combined), positive wire 11, cathode wire 12, PVC tee piece 13, wide viscosity type turbine flowmeter 13a composition.
According to Fig. 1, Fig. 2 is known, its annexation is: composite water draining board 1 use fastening bolt 1a is connected with snap joint buckle 1b, the filter membrane 1e that fastening bolt 1a is wrapped to form through long fine heat bundle nonwoven is connected with composite water draining board inner core 1d, and by electric osmose wire 1c access fastening bolt 1a, snap joint 1b insertion Rapid fastener access groove 2b connection can be met to the quick plate tube connector of lead-type closed 2(to be formed by the additional Rapid fastener access groove of common plastics plate tube connector and wire guide, those of ordinary skill in the art all can prepare), and electric osmose wire 1c is reserved to aperture 2a through plate tube connector, notice that last aperture need to be with sealings such as glass cements, again the electric osmose wire 1c drawing with row's composite water draining board 1 is linked into positive wire 11, again by positive wire 11 be linked into can the positive pole of pole-changing electric osmose system 10 in, in addition again by adjacent row's electric osmose wire 1c by cathode wire 12 be linked into can the negative pole of pole-changing electric osmose system 10 in, under re-laying in the withstand voltage ripple arm 3 of sealed vacuum draining, wear supervisor's arm 3a and the arm 3b that is connected supervisor, by under wear supervisor arm 3a connect composite water draining board 1 with the arm 3b that is connected supervisor with connecing the quick plate tube connector 2 of lead-type closed, blank area is noted with sealings such as glass cements in case leak-stopping gas, again by under wear supervisor arm 3a be linked in sealed vacuum draining PVC supervisor second 5, adjacent row's connection supervisor's arm 3b is linked into sealed vacuum draining PVC supervisor first 4, wherein it should be noted that, when the by-pass valve control 6 of sealed vacuum draining PVC supervisor first 4 is opened, and when sealed vacuum draining PVC supervisor second 5 by-pass valve controls 7 are closed, the polarization state that is connected supervisor's the upper all composite water draining boards 1 of arm 3b with sealed vacuum draining PVC supervisor first 4 is necessary for negative electrode, as shown in Figure 1, equally, when sealed vacuum draining PVC supervisor second 5 by-pass valve controls 7 are opened and when sealed vacuum draining PVC supervisor first 4 by-pass valve controls 7 are closed, the polarization state of wearing supervisor's the upper all composite water draining boards 1 of arm 3a under being connected with sealed vacuum draining PVC supervisor second 5 is necessary for negative electrode, as shown in Figure 2.Sealed vacuum draining PVC supervisor first 4 is connected vacuum pump 9 with sealed vacuum draining PVC supervisor second 5 by PVC tee piece 13 and wide viscosity type turbine flowmeter 13a, and by-pass valve control 8 is linked in PVC tee piece 13.
Known according to Fig. 3, composite water draining board 1 use fastening bolt 1a is connected with snap joint buckle 1b, snap joint 1b is inserted to Rapid fastener access groove 2b and connect the quick plate tube connector 2 of closed, and by electric osmose wire 1c access fastening bolt 1a, again electric osmose wire 1c is passed to hole 2a through wire, finally can connect the quick plate tube connector 2 of lead-type closed with under the arm 3b that wears supervisor's arm 3a or connect supervisor connect.
Known according to Fig. 4, composite water draining board 1 use fastening bolt 1a is connected with snap joint buckle 1b, the filter membrane 1e that fastening bolt 1a is wrapped to form through long fine heat bundle nonwoven is connected with composite water draining board inner core 1d, and by electric osmose wire 1c access fastening bolt 1a.
Known according to Fig. 5, under wear supervisor arm 3a pass from sealed vacuum draining PVC supervisor first 4 bottoms, be then linked in sealed vacuum draining PVC supervisor second 5, adjacent row's connection supervisor's arm 3b is linked into sealed vacuum draining PVC supervisor first 4.
Can accelerate ultra-soft silt soil discharging consolidation method for processing foundation by pole-changing vacuum electroosmosis according to above-mentioned binary channels, working time is 32 days, and detect bearing capacity of foundation soil, shallow layer foundation bearing capacity has reached 80-90kPa, and the bearing capacity of foundation soil of 3-6m ultra-soft silt soil (converting through vane-shear and static sounding) has all reached 70-85kPa, has reached the processing target of expection.
Through preresearch estimates, the present embodiment operating expenses is the 65%-75% of conventional vacuum preloading or pure electric osmose, and the construction period can reduce by 50% left and right, Energy Intensity Reduction 45% left and right, loss of vacuum reduces by 40% left and right, and after reinforcing, shallow-layer and deep foundation bearing capacity on average reach 80kPa left and right, reach the object of accelerating ultra-soft silt soil discharging consolidation, have that ground is processed evenly simultaneously, easy construction, load time be short, the clear superiority of economy.
Below preferred embodiment of the present invention is illustrated; but the present invention is not limited to above-described embodiment; can also innovation and creation according to the present invention make multiple variation; the change made under every Spirit Essence according to technical solution of the present invention and core content, principle, modification, substitute, combination, simplify; be equivalent mapping mode, these modes all belong in the protection domain that the claims in the present invention limit.
Claims (2)
1. binary channels can be accelerated a method for super soft soil consolidation by pole-changing vacuum electroosmosis, the steps include:
1. on pending ultra-soft silt soil place, by the mode laying geotextile of cystosepiment or pontoon bridge;
2. in a row insert composite water draining board as depth direction drainage system, and make composite water draining board just exposure on geotextile;
3. lay binary channels vacuum drainage supervisor according to design pitch, i.e. sealed vacuum draining PVC supervisor's first and sealed vacuum draining PVC supervisor second, described spacing is 2 ~ 50m;
4. lay the withstand voltage ripple arm of sealed vacuum draining according to design pitch, described spacing is 0.5 ~ 10m, the arm of wearing supervisor is arranged with the branch interval that is connected supervisor, be connected in sealed vacuum draining PVC supervisor's first or sealed vacuum draining PVC supervisor second according to design;
5. in composite water draining board exposure position, with connecing the quick plate tube connector of lead-type closed, withstand voltage to composite water draining board and sealed vacuum draining ripple arm is connected, forms horizontal-vertical-dark closed vacuum prepressing water discharge system;
6. use electric osmose wire that same row's composite water draining board is connected in series and forms electroosmosis electrode sequence in a row, the access in parallel of the single sequence of the composite water draining board respectively interval one arranged can pole-changing electric osmose system negative electrode or anode, by single adjacent composite water draining board sequence access respectively can pole-changing electric osmose system male or female, verify the mode of connection, guarantee that every composite water draining board is all in place in circuit, the polarity of electrode that adjacent single sequence accesses is contrary; After completing above-mentioned steps, lay vacuum diaphragm;
7. open vacuum electroosmosis associated working Mode A, the by-pass valve control of sealed vacuum draining PVC supervisor first is opened, the by-pass valve control of sealed vacuum draining PVC supervisor second closes, and the described vacuum electroosmosis associated working Mode A duration is 0.2 ~ 96 hour;
8. when the water yield in electric current, the wide viscosity type turbine flowmeter showing in can pole-changing electric osmose system obviously reduces, adjustment can pole-changing electric osmose system, make the reversal of composite water draining board, make sealed vacuum draining PVC supervisor first by-pass valve control pass and sealed vacuum draining PVC supervisor second by-pass valve control open simultaneously, enter vacuum electroosmosis associated working Mode B, the described vacuum electroosmosis associated working Mode B duration is 0.2 ~ 96 hour;
9. when the electric current showing in can pole-changing electric osmose system, the water yield of wide viscosity type turbine flowmeter obviously reduce again, then switch to vacuum electroosmosis associated working Mode A, the described time interval is 0.2 ~ 96 hour;
10. by this 7. 8. 9. mode periodic duty of step, until the shallow-layer in ultra-soft silt soil region and the soil moisture content of deep layer decline, static sounding and vane-shear reach expection requirement, unloading, and the duration is 10 ~ 35 days.
2. a kind of binary channels claimed in claim 1 can pole-changing vacuum electroosmosis be accelerated the device of ultra-soft silt soil discharging consolidation ground processing, it comprises composite water draining board (1), snap joint buckle (1b), composite water draining board inner core (1d), can connect the quick plate tube connector of lead-type closed (2), wire passes hole (2a), Rapid fastener access groove (2b), sealed vacuum draining is withstand voltage ripple arm (3), under wear supervisor's arm (3a), connect supervisor's arm (3b), sealed vacuum draining PVC supervisor's first (4), sealed vacuum draining PVC supervisor's second (5), the by-pass valve control (6) of vacuum drainage supervisor first, master control valve (8), PVC tee piece (13), wide viscosity type turbine flowmeter (13a), it is characterized in that: composite water draining board (1) fastening bolt (1a) is connected with snap joint buckle (1b), the filter membrane (1e) that fastening bolt (1a) is wrapped to form through long fine heat bundle nonwoven is connected with composite water draining board inner core (1d), by in electric osmose wire (1c) access fastening bolt (1a), snap joint buckle (1b) is inserted to Rapid fastener access groove (2b) connection and can connect the quick plate tube connector of lead-type closed (2), electric osmose wire (1c) is passed to hole (2a) through wire, the electric osmose wire (1c) of drawing with row's composite water draining board (1) is linked into positive wire (11), again by positive wire (11) be linked into can the positive pole of pole-changing electric osmose system (10) in, again by adjacent row's electric osmose wire (1c) by cathode wire (12) be linked into can the negative pole of pole-changing electric osmose system (10) in, re-lay in the withstand voltage ripple arm of sealed vacuum draining (3) under wear supervisor arm (3a) and be connected supervisor arm (3b), by under the arm (3a) of wearing supervisor and the arm (3b) that is connected supervisor with connecing the quick plate tube connector of lead-type closed (2) connection composite water draining board 1, then by under wear supervisor arm (3a) be linked in sealed vacuum draining PVC supervisor's second (5), adjacent row's connection supervisor's arm (3b) is linked in sealed vacuum draining PVC supervisor's first (4), sealed vacuum draining PVC supervisor's first (4) is connected vacuum pump (9) with sealed vacuum draining PVC supervisor's second (5) by PVC tee piece (13) and wide viscosity type turbine flowmeter (13a), master control valve (8) is linked into PVC tee piece (13).
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