CN112979125B - Vacuum electroosmosis reinforced geotextile tube bag dehydration system and method - Google Patents
Vacuum electroosmosis reinforced geotextile tube bag dehydration system and method Download PDFInfo
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- 230000018044 dehydration Effects 0.000 title claims abstract description 67
- 238000006297 dehydration reaction Methods 0.000 title claims abstract description 67
- 238000005370 electroosmosis Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000004746 geotextile Substances 0.000 title claims description 51
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 45
- 239000010935 stainless steel Substances 0.000 claims abstract description 45
- 239000004033 plastic Substances 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000002002 slurry Substances 0.000 claims abstract description 16
- 239000004744 fabric Substances 0.000 claims description 21
- 239000012528 membrane Substances 0.000 claims description 16
- 239000002689 soil Substances 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 239000013049 sediment Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000008595 infiltration Effects 0.000 claims description 3
- 238000001764 infiltration Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000009958 sewing Methods 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 2
- 229920006255 plastic film Polymers 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 10
- 239000010802 sludge Substances 0.000 abstract description 7
- 238000004904 shortening Methods 0.000 abstract description 5
- 230000002457 bidirectional effect Effects 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 description 10
- 238000007596 consolidation process Methods 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/15—Treatment of sludge; Devices therefor by de-watering, drying or thickening by treatment with electric, magnetic or electromagnetic fields; by treatment with ultrasonic waves
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention belongs to the technical field of slurry dehydration, and particularly relates to a bidirectional vacuum electroosmosis reinforced system and a method for dehydrating a geotechnical tubular bag, wherein a conductive plastic drainage plate is used as an anode and is connected with a main pipe through a direct-discharge joint and a branch pipe, and a stainless steel filter pipe is used as a cathode and is connected with the main pipe through the branch pipe; the electric jacks are positioned at two ends of the bottom of the geotechnical pipe bag and used for supporting the stainless steel filter pipe, the slurry filling hole is positioned at the top of the geotechnical pipe bag, the main pipe is provided with a vacuum pump device, the tail end of the main pipe is provided with a residual water treatment device, and the high-power voltage-stabilizing direct current supply device is respectively connected with the conductive plastic drain board and the stainless steel filter pipe through leads. The invention provides a bidirectional vacuum electroosmosis reinforced geotechnical tube bag dehydration system and method which can realize environment-friendly and rapid dehydration of sludge, achieve the purposes of shortening construction period, improving dehydration effect and reducing construction cost.
Description
Technical Field
The invention belongs to the technical field of slurry dehydration, and particularly relates to a vacuum electroosmosis reinforced system and method for dehydrating a soil engineering pipe bag.
Background
The prior art and the defects are as follows:
in recent years, with the continuous improvement of the material culture level of people, the demands of the public on ecological products are increasingly urgent, the attention of governments on environmental protection treatment is higher and higher, and the corresponding river and lake environmental protection treatment projects are more and more. Environmental-friendly dredging is an important means for reducing the endogenous pollution of rivers and lakes and reducing the pollution load of the rivers and lakes, and a large amount of high-water-content polluted slurry is generated and needs to be treated in the construction process. The geotechnical pipe bag dehydration technology is a special bag filtering structure woven and sewn by polypropylene yarns and is specially used for treating sludge slurry with high water content. The mud of high moisture content mixes flocculating agent back and gets into the tube bag, and the repeated filling and the gravity drainage consolidation of going into for several months can only reduce the mud moisture content to below 60%, and if want to accelerate drainage consolidation through the mode that increases filling pressure, then need select for use the tube bag that tensile strength is higher, this will improve material cost by a wide margin. The vacuum preloading dehydration technology and the electroosmosis dehydration technology are soft clay foundation treatment technologies widely used in the field of coastal dredger fill foundation treatment, and compared with self-weight drainage consolidation, the water drainage speed is high, and the water drainage process is economic and environment-friendly. The two technologies are organically combined with the geotechnical pipe bag dehydration technology, so that the drainage consolidation process is further accelerated, the construction period is shortened, the drainage consolidation effect is further improved, and the pipe bag loose core phenomenon is avoided, so that the manual tedding frequency is reduced. Therefore, it is necessary to develop a composite dehydration technology which can shorten the dehydration period of the geotextile tube bags and improve the dehydration effect of the geotextile tube bags on the basis of the geotextile tube bag dehydration technology.
Before the invention, Chinese invention patent (CN 109485223A) discloses a dewatering system for a geotechnical pipe bag with a built-in drainage plate, which uses four connecting strips to hang a plastic drainage plate, theoretically, the plastic drainage plate can be fixed at the center of the pipe bag, but because the pipe bag needs to be filled for many times, the plastic drainage plate is embedded in sludge and cannot move after one-time drainage consolidation is finished; in addition, because the geotextile tube bags drain water outwards, the external geotextile does not realize effective vacuum sealing, and the air leakage problem exists when the drainage plate is vacuumized, and the vacuum negative pressure can not be effectively loaded. Patent (CN 210134009U) discloses a geotechnical pipe bag with an inner core, the drainage body of the inner core is a sand filling bag, the sand filling bag is vacuumized after slurry in the pipe bag is filled, and the geotechnical pipe bag has the problems that the effective vacuum sealing cannot be realized, and the drainage body is embedded by sludge and cannot move as in the previous patent. The invention patent (CN 102603151B) discloses a geotechnical tube bag dehydration technology based on electroosmosis reinforced dehydration, wherein a graphite electrode is used as an anode, a copper wire-wound PVC tube is used as a cathode, and water moves from the anode to the cathode and is discharged out of soil body through the PVC tube. In the process, although the graphite electrode can not be corroded, the graphite electrode can be degraded under the alternating action of cold and heat; although electroosmosis can play a role in strengthening dehydration, if the vacuum preloading or the preloading is not matched, the later-stage electrode is separated from the soil body, and the dehydration efficiency is reduced.
The difficulty and significance for solving the technical problems are as follows:
therefore, based on the problems that the dewatering dead-weight drainage consolidation of the traditional geotechnical pipe bag is long in time consumption, the dehydration effect of slurry in the central area of the dewatered pipe bag is poor and the like, the vacuum electroosmosis reinforced geotechnical pipe bag dehydration system and method which can realize environment-friendly and rapid dehydration of sludge and achieve the purposes of shortening the construction period, improving the dehydration effect and reducing the construction cost have important practical significance.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provide a vacuum electroosmosis reinforced geotechnical tubular bag dehydration system and method which can realize environment-friendly and rapid dehydration of sludge, achieve the purposes of shortening the construction period, improving the dehydration effect and reducing the construction cost.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows:
a vacuum electroosmosis enhanced geotextile tube bag dewatering system, comprising: the vacuum electroosmosis geotechnical pipe bag combined dehydration device comprises a geotechnical pipe bag, a conductive plastic drainage plate, a stainless steel filter pipe, an electric jack, a slurry filling hole, a straight-line joint, a branch pipe and a main pipe, wherein the conductive plastic drainage plate is used as an anode, is annularly bound on the inner wall of the geotechnical pipe bag at an interval of 1.5m, and is connected with the main pipe through the straight-line joint and the branch pipe, and the stainless steel filter pipe is used as a cathode and is connected with the main pipe through the branch pipe; the electric jacks are positioned at two ends of the bottom of the geotechnical pipe bag and used for supporting the stainless steel filter pipe, the slurry filling hole is positioned at the top of the geotechnical pipe bag, the main pipe is provided with a vacuum pump device, the tail end of the main pipe is provided with a residual water treatment device, and the high-power voltage-stabilizing direct current supply device is respectively connected with the conductive plastic drain board and the stainless steel filter pipe through leads.
The electric jacks are positioned at two ends of the bottom of the geotextile tube bag, are connected with the stainless steel filter tube and can be used for moving the stainless steel filter tube up and down; the mud filling holes are positioned at the top of the earthwork pipe bag, and the number of the mud filling holes can be reserved according to the length of the earthwork pipe bag. The high-power voltage-stabilizing direct current supply device is used as a direct current power supply during electroosmosis dehydration. The vacuum pump device can be used for pumping out moisture near the conductive plastic drainage plate and the stainless steel filter tube. The residual water treatment device is used for treating and removing water from the soil engineering pipe bag.
The invention can also adopt the following technical scheme:
in the vacuum electroosmosis reinforced geotextile tube bag dewatering system, further, the vacuum electroosmosis reinforced geotextile tube bag dewatering system further comprises a pebble cushion layer and two cloth membranes, wherein the pebble cushion layer is positioned between the geotextile tube bag and the two cloth membranes, and the two cloth membranes can seal and wrap the geotextile tube bag.
The pebble bed course can be used as a bottom drainage bed course.
In the vacuum electroosmosis reinforced dewatering system for the geotextile tube bag, further, the length of the geotextile tube bag is preferably 50m, and 500g/m is used for two cloths and one film2The two cloth-one film composite geomembrane is preferably 70m long and 5-10 m wide in width exceeding the designed perimeter of the geotextile tube bag.
A vacuum electroosmosis-enhanced geotextile tube bag dewatering method using the vacuum electroosmosis-enhanced geotextile tube bag dewatering system of any one of the above, comprising the steps of:
the method comprises the following steps: outward dehydration: the mud is injected into the geotechnical pipe bag through the mud filling hole, and at the moment, the electric jack is started to support the stainless steel filter pipe to the middle height of the pipe bag; after filling, firstly, flowing out a part of water along the outer wall of the geotextile tube bag under the action of internal filling pressure, after the outward infiltration process is basically finished, unfolding two cloth films and one film to the top of the geotextile tube bag, and welding the plastic films by using a double-track thermowelder to form a sealed environment for the geotextile tube bag;
step two: inward dehydration: starting a vacuum pump device and a high-power voltage-stabilizing direct current supply device, vacuumizing along a stainless steel filter tube and a conductive plastic drainage plate, performing vacuum preloading and electroosmosis dehydration, and accelerating the removal of moisture in bottom mud;
step three: sampling stage by stage to measure the water content, stopping vacuumizing and electroosmosis when the water content of the sediment is reduced to be below a target water content, cutting the two cloth membranes one along a welding line, rolling back to the bottom of the geotextile tube bag, breaking the bag along the axis of the top of the geotextile tube bag, transferring the sediment, removing the geotextile tube bag, and recovering the two cloth membranes one, the stainless steel filter tube, the conductive plastic drainage plate and the pebble cushion layer.
In the vacuum electroosmosis reinforced dewatering method for the geotechnical bags, the method further comprises the following steps before the step one:
step 1: cleaning a dehydration site, leveling the site, laying two cloth-one films at the designed position, and rolling up two ends of the two cloth-one films inwards;
step 2: paving a pebble cushion layer on the two cloth films, and paving a soil engineering pipe bag on the pebble cushion layer;
and 3, step 3: circumferentially binding conductive plastic drainage plates at intervals of 1.5m around the inside of the geotextile tube bag, sealing one end of each conductive plastic drainage plate by using a bag sewing machine, connecting the other end of each conductive plastic drainage plate with the main tube through a straight-line connector and a branch tube, and finally connecting the main tube with a vacuum pump device which is connected with a residual water treatment device; stainless steel filter tubes are arranged in the geotechnical tube bag at intervals of 4m along the width direction, two ends of each stainless steel filter tube are sealed by rubber plugs, the rubber plug at one end is perforated, branch tubes penetrate through the rubber plugs and enter the stainless steel filter tubes, and supports at two ends are arranged on an electric jack; one end of the conductive plastic drainage plate and one end of the stainless steel filter tube are connected with a high-power voltage-stabilizing direct current supply device through leads.
In conclusion, the invention has the following advantages and positive effects:
1. according to the invention, on the basis that the traditional geotechnical pipe bag is outwards dehydrated only by self weight, the conductive plastic drainage plate and the stainless steel filter tube electrode for vacuum and electroosmosis combined dehydration are additionally arranged in the geotechnical pipe bag, a vacuum closed environment is realized outside the geotechnical pipe bag, and finally the conventional self weight one-way dehydration is converted into the two-way vacuum electroosmosis dehydration, so that the dehydration construction period is shortened, the loose core phenomenon of the geotechnical pipe bag is avoided, and the dehydration effect is improved. The technology better meets the treatment requirements of owners, and has great popularization value in practical engineering.
2. According to the invention, on the basis that the traditional geotechnical pipe bag is dehydrated by self weight, a vacuum closed environment is formed outside the geotechnical pipe bag, and the vacuum pumping and electroosmosis dehydration functions are realized inside the geotechnical pipe bag, so that the problems that the geotechnical pipe bag is long in dehydration time and bottom mud is loose at the center of the geotechnical pipe bag are solved, the environmental protection and quick dehydration of mud in the pipe bag are realized, and the purposes of shortening the construction period and improving the dehydration effect are achieved. In addition, the construction method guides the construction of the vacuum electroosmosis reinforced geotextile tube bag dehydration system, and materials such as two cloth membranes, one membrane, a conductive plastic drainage plate, a stainless steel filter tube, a pebble cushion layer and the like can be recycled after the construction is finished, so that the construction cost is further reduced, and the method has a certain popularization value.
Drawings
The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for illustrative purposes only and thus do not limit the scope of the present invention. Furthermore, unless otherwise indicated, the drawings are intended to be illustrative of the structural configurations described herein only, and are not necessarily drawn to scale.
FIG. 1 is a schematic view of the construction of the vacuum electroosmotic geotextile tube bag dewatering system of the present invention;
FIG. 2 is a sectional view taken along section A-A of the vacuum electroosmotic geotextile tube bag dewatering system of the present invention;
fig. 3 is a sectional view of the vacuum electroosmotic geotextile tube bag dewatering system of the present invention taken along line B-B.
In the figure: the device comprises a vacuum electroosmosis soil engineering pipe bag combined dehydration device 1, a vacuum pump device 2, a high-power voltage-stabilizing direct current supply device 3, a residual water treatment device 4, a soil engineering pipe bag 5, two cloth membranes 6, a conductive plastic drainage plate 7, a stainless steel filter pipe 8, an electric jack 9, a slurry filling hole 10, a pebble cushion layer 11, a straight-line joint 12, a branch pipe 13, a main pipe 14 and a lead 15.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 3.
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
the first embodiment is as follows:
a vacuum electroosmosis strengthened geotechnical tube bag dehydration system comprises a vacuum electroosmosis geotechnical tube bag combined dehydration device 1, a vacuum pump device 2, a high-power voltage-stabilizing direct current supply device 3 and a residual water treatment device 4.
The vacuum electroosmosis soil engineering pipe bag combined dehydration device 1 comprises a soil engineering pipe bag 5, two cloth membranes 6, a conductive plastic drain board 7, a stainless steel filter pipe 8, an electric jack 9, a slurry filling hole 10, a pebble cushion layer 11, a straight-line joint 12, branch pipes 13 and a main pipe 14. The geotextile tube bag 5 is woven by polypropylene monofilaments into cloth and is sewn according to production requirements; 500g/m of two cloth and one film 6 is used2The two cloth-one film composite geomembranes can be used for seepage prevention and provide a vacuum environment; the conductive plastic drainage plate is used as an anode and is annularly bound on the inner side of the geotechnical pipe bag 5 at an interval of 1.5m, the stainless steel filter tube 8 is used as a cathode and is vertically adjusted by the electric jack 9 to be positioned at the middle height of the geotechnical pipe bag 5, and the stainless steel filter tube and the main pipe 14 are connected through the straight-line connector 12 and the branch pipe 13; a slurry filling hole 10 is reserved at the top of the geomembrane bag 5 and used for supplementing slurry; the bottom is paved with a pebble bed 11 which is used as a bottom drainage bed.
Further, it is also considered in the embodiment that the vacuum pump device 2 is connected with the vacuum electroosmotic earthwork tube bag combined dehydration device 1 through the main pipe 14, and can be used for pumping the moisture in the slurry near the conductive plastic drainage plate 7 and the stainless steel filter pipe 8, and the device is a centralized suction type water-vapor separation pump and can be specially customized according to the engineering scale.
It should be noted that the high-power voltage-stabilized dc power supply device 3 is connected to the conductive plastic drain plate 7 and the stainless steel filter tube 8 through the wires 15, respectively, and is used as a dc power supply for the electroosmotic dehydration. The voltage and power parameters of the device can be specially customized by combining the engineering scale and the power of an external power supply system.
The residual water treatment device 4 is connected with the vacuum pump device 2 and is used for pumping out the moisture in the geotube bag 5.
Example two:
a vacuum electroosmosis reinforced dehydration method for a geotechnical tube bag specifically comprises the following steps:
the method comprises the following steps: cleaning a dehydration site, leveling the site, laying two cloth-one films 6 at the designed position, and rolling up two ends of the two cloth-one films 6;
step two: paving a pebble cushion layer 11 on the two cloth-one films 6, and paving a soil engineering pipe bag 5 on the pebble cushion layer;
step three: binding conductive plastic drainage plates 7 at intervals of 1.5m around the inside of the geotextile tube bag 5, sealing one ends of the conductive plastic drainage plates 7 by using a bag sewing machine, connecting the other ends of the conductive plastic drainage plates 7 with a main tube 14 through a straight-line joint 12 and a branch tube 13, and finally connecting the conductive plastic drainage plates with a vacuum pump device 2, wherein the vacuum pump device 2 is connected with a residual water treatment device 4; stainless steel filter tubes 8 are arranged at intervals of 4m, two ends of each stainless steel filter tube 8 are sealed by rubber plugs, the rubber plug at one end is perforated, a branch tube 13 penetrates through the rubber plugs and enters the stainless steel filter tubes 8, and two ends of the branch tube are supported on an electric jack 9; one ends of the conductive plastic drainage plate 7 and the stainless steel filter tube 8 are connected with the high-power voltage-stabilizing direct current supply device 3 through a lead 15;
step four: the mud is driven into the geotechnical pipe bag 5 through the mud filling hole 10, at the moment, the electric jack 9 is started, and the stainless steel filter pipe 8 is supported to the middle height of the pipe bag; after filling, firstly, flowing out a part of water (outward dehydration) along the outer wall of the geotextile tube bag 5 under the action of internal filling pressure, unfolding two cloth-one membranes 6 to the top of the geotextile tube bag after the outward infiltration process is basically finished, and welding the plastic membranes by using a double-track hot welding machine to form a sealed environment for the geotextile tube bag 5;
step five: starting the vacuum pump device 2 and the high-power voltage-stabilizing direct current supply device 3, vacuumizing along the stainless steel filter tube 8 and the conductive plastic drainage plate 7, performing vacuum preloading and electroosmosis dehydration (inward dehydration), and accelerating the removal of moisture in the bottom mud;
step six: sampling stage by stage to measure the water content, stopping vacuumizing and electroosmosis when the water content of the sediment is reduced to be below a target water content, cutting the two cloth membranes 6 along the welding line, rolling back the bottom of the geotextile tube bag 5, breaking the bag along the axis of the top of the geotextile tube bag 5, transferring the sediment, removing the geotextile tube bag 5, and recycling the two cloth membranes 6, the stainless steel filter tube 8, the conductive plastic drain board 7 and the pebble cushion layer 11.
In conclusion, the invention provides the vacuum electroosmosis reinforced geotechnical tubular bag dehydration system and method which can realize environment-friendly and rapid dehydration of sludge, achieve the purposes of shortening the construction period, improving the dehydration effect and reducing the construction cost.
The present invention has been described in detail with reference to the above examples, but the description is only for the preferred examples of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (5)
1. The utility model provides a geotechnological tubular bag dewatering system is reinforceed to vacuum electroosmosis which characterized in that: the vacuum electroosmosis reinforced geotextile tube bag dehydration system comprises: the vacuum electroosmosis geotechnical pipe bag combined dehydration device comprises a geotechnical pipe bag, a conductive plastic drainage plate, a stainless steel filter pipe, an electric jack, a slurry filling hole, a straight-line joint, a branch pipe and a main pipe, wherein the conductive plastic drainage plate is used as an anode, is annularly bound on the inner wall of the geotechnical pipe bag at an interval of 1.5m and is connected with the main pipe through the straight-line joint and the branch pipe, and the stainless steel filter pipe is used as a cathode and is connected with the main pipe through the branch pipe; the electric jacks are positioned at two ends of the bottom of the geotechnical tube bag and support the stainless steel filter tube at the middle height in the geotechnical tube bag, the slurry filling hole is positioned at the top of the geotechnical tube bag, the main tube is provided with a vacuum pump device, the tail end of the main tube is a residual water treatment device, the high-power voltage-stabilizing direct current supply device is respectively connected with the conductive plastic drain board and the stainless steel filter tube through leads, two cloth films are arranged below the geotechnical tube bag and are used for sealing and wrapping the geotechnical tube bag when in vacuum electroosmosis dehydration, the conductive plastic drain board and the stainless steel filter tube are horizontally arranged, the two cloth films and the vacuum pump device form a vacuum prepressing pumping subsystem, and the high-power voltage-stabilizing direct current supply device, the conductive plastic drain board and the stainless steel filter tube form an electroosmosis system to strengthen the vacuum prepressing pumping subsystem.
2. The vacuum electroosmosis enhanced geotextile tube bag dewatering system of claim 1, wherein: the vacuum electroosmosis reinforced geotechnical tube bag dehydration system further comprises a pebble cushion layer, and the pebble cushion layer is located between the geotechnical tube bag and the two cloth membranes.
3. The vacuum electroosmosis enhanced geotextile tube bag dewatering system of claim 2, wherein: the length of the geotextile tube bag is 50m, and 500g/m is used for two cloths and one film2The two cloth-one film composite geomembranes have the length of 70m and the width exceeding the designed perimeter of the geotextile tube bag by 5-10 m.
4. A vacuum electroosmosis reinforced dehydration method for a soil engineering pipe bag is characterized in that: the vacuum electroosmosis-enhanced geotextile tube bag dehydration method uses the vacuum electroosmosis-enhanced geotextile tube bag dehydration system of any one of claims 1 to 3, and comprises the following steps:
the method comprises the following steps: and (3) outward dehydration: the mud is injected into the geotechnical pipe bag through the mud filling hole, and at the moment, the electric jack is started to support the stainless steel filter pipe to the middle height of the pipe bag; after filling, firstly, flowing out a part of water along the outer wall of the geotextile tube bag under the action of internal filling pressure, after the outward infiltration process is basically finished, unfolding two cloth films and one film to the top of the geotextile tube bag, and welding the plastic films by using a double-track thermowelder to form a sealed environment for the geotextile tube bag;
step two: inward dehydration: starting a vacuum pump device and a high-power voltage-stabilizing direct-current power supply device, vacuumizing along a stainless steel filter tube and a conductive plastic drainage plate, performing vacuum preloading and electroosmosis dehydration, and accelerating the removal of moisture in bottom mud;
step three: sampling stage by stage to measure the water content, stopping vacuumizing and electroosmosis when the water content of the sediment is reduced to be below a target water content, cutting the two cloth membranes one along a welding line, rolling back to the bottom of the geotextile tube bag, breaking the bag along the axis of the top of the geotextile tube bag, transferring the sediment, removing the geotextile tube bag, and recovering the two cloth membranes one, the stainless steel filter tube, the conductive plastic drainage plate and the pebble cushion layer.
5. The vacuum electroosmosis reinforced dewatering method for the geotechnical bags according to claim 4, wherein: the method also comprises the following steps before the step one:
step 1: cleaning a dehydration site, leveling the site, laying two cloth-one films at the designed position, and rolling up two ends of the two cloth-one films inwards;
and 2, step: paving a pebble cushion layer on the two cloth films, and paving a soil engineering pipe bag on the pebble cushion layer;
and step 3: circumferentially binding conductive plastic drainage plates at intervals of 1.5m around the inner wall of the geotextile tube bag, sealing one end of each conductive plastic drainage plate by using a bag sewing machine, connecting the other end of each conductive plastic drainage plate with the main tube through a straight-line connector and a branch tube, and finally connecting the main tube with a vacuum pump device, wherein the vacuum pump device is connected with a residual water treatment device; stainless steel filter tubes are arranged in the geotechnical tube bag at intervals of 4m along the width direction, two ends of each stainless steel filter tube are sealed by rubber plugs, the rubber plug at one end is perforated, branch tubes penetrate through the rubber plugs and enter the stainless steel filter tubes, and supports at two ends are arranged on an electric jack; one end of the conductive plastic drainage plate and one end of the stainless steel filter tube are connected with a high-power voltage-stabilizing direct current supply device through leads.
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| CN202110170483.XA CN112979125B (en) | 2021-02-08 | 2021-02-08 | Vacuum electroosmosis reinforced geotextile tube bag dehydration system and method |
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| CN202110170483.XA CN112979125B (en) | 2021-02-08 | 2021-02-08 | Vacuum electroosmosis reinforced geotextile tube bag dehydration system and method |
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