CN112144501A - Plastic drainage plate for preventing micro soil particles from being blocked and construction method thereof - Google Patents
Plastic drainage plate for preventing micro soil particles from being blocked and construction method thereof Download PDFInfo
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- CN112144501A CN112144501A CN202010913487.8A CN202010913487A CN112144501A CN 112144501 A CN112144501 A CN 112144501A CN 202010913487 A CN202010913487 A CN 202010913487A CN 112144501 A CN112144501 A CN 112144501A
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- drainage plate
- power supply
- soil particles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/08—Prevention of membrane fouling or of concentration polarisation
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/11—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/22—Electrical effects
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses a plastic drainage plate for preventing micro soil particles from being blocked, which comprises a drainage plate body, wherein the drainage plate body is coated with a filter membrane, the drainage plate body is provided with a long strip-shaped fine groove, a plurality of conductive wires are embedded in the long strip-shaped fine groove, and the conductive wires are connected with an external power supply. After the electric lead of the drainage plate is electrified, the small soil particles which cannot be filtered by the filter membrane and the larger soil particles adsorbed on the filter membrane of the drainage plate are repelled out, so that the phenomena of filter membrane blockage, drain plate clogging and filter membrane permeability reduction are avoided.
Description
Technical Field
The invention relates to a novel plastic drainage plate for preventing a filter membrane from being adsorbed by micro soil particles, and also relates to a construction method of the novel plastic drainage plate for preventing the filter membrane from being adsorbed by the micro soil particles, which is mainly used for soft soil foundation treatment and sludge treatment and belongs to the field of geotechnical engineering and environmental engineering.
Background
The lake dredging sludge generally has water content as high as 80-200%, is in a flowing and suspending state, basically has no strength, and can be subjected to subsequent construction after foundation treatment. In recent years, vacuum preloading drainage consolidation technology is widely adopted in lake dredging sludge treatment engineering. However, traditional plastics drain bar that adopts during vacuum preloading is when drawing water, because soil particle is thinner, remove the entering filter membrane along with water at drainage consolidation in-process, cause the filter membrane permeability to reduce, form fine and close earth pillar at the drain bar periphery simultaneously, the drain bar silts up stifled, cause to be close to the drain bar department soil body intensity higher, the not good phenomenon of soil body drainage consolidation effect between the drain bar, thereby lead to plastics drain bar performance to descend, still need take out plastics drain bar, get rid of above-mentioned absorbent earth, thereby cause the waste of time, money, manpower.
Disclosure of Invention
In view of the defects of the background art, the invention aims to provide a novel plastic drainage plate for preventing a filter membrane from being adsorbed by micro soil particles. When this drain bar overcomes vacuum pre-compaction, plastics drain bar blocks up and tiny granule can't be by the filterable condition of filter membrane for plastics drain bar filter membrane no longer blocks up, has improved plastics drain bar's performance and sustainability greatly.
Therefore, the plastic drainage plate capable of preventing micro soil particles from being blocked comprises a drainage plate body, wherein the drainage plate body is wrapped with the filter membrane, the drainage plate body is provided with the long strip-shaped fine groove, the conductive wire is embedded in the long strip-shaped fine groove, and the conductive wire is connected with an external power supply.
In the invention, the plastic drainage plate is provided with a plurality of conductive wires on the strip-shaped thin groove, the conductive wires form a loop, and the conductive wires are connected with an external power supply. Because the fine clay particles have the charged property, after the copper conductor wire is electrified, the fine clay particles which cannot be filtered by the filter membrane and the larger clay particles adsorbed on the filter membrane of the drainage plate can be repelled and discharged due to the mutual repulsion principle of the two charged substances, so that the phenomena of filter membrane blockage, drainage plate clogging and filter membrane permeability reduction can not be formed.
Drawings
FIG. 1 is a schematic cross-sectional view of a first embodiment of the present invention illustrating a plastic drainage plate for preventing clogging of fine soil particles for surcharge vacuum preloading treatment;
FIG. 2 is a schematic plan view of a plastic drainage plate for preventing fine soil particles from clogging in FIG. 1;
FIG. 3 is a schematic top view of the plastic drainage plate for preventing fine soil particles from clogging in FIG. 2;
FIG. 4 is a schematic top view of the plastic drainage plate of FIG. 2 for preventing fine soil particles from clogging;
FIG. 5 is a schematic cross-sectional view of a second embodiment of the present invention, illustrating a cross-sectional structure of a plastic drainage plate for preloading vacuum treatment for preventing clogging of fine soil particles;
FIG. 6 is a schematic plan view of a plastic drainage plate for preventing fine soil particles from clogging in FIG. 5;
FIG. 7 is a schematic plan view of the branch conductive wire of the plastic drainage plate for preventing fine soil particles from clogging in FIG. 5 after being electrically conducted;
fig. 8 is a schematic plan view showing the switching of the positive and negative electrodes of the branch conductive wire of the plastic drainage plate for preventing the clogging of fine soil particles in fig. 7.
Detailed Description
Referring to fig. 1 to 4, a first embodiment of the present invention provides a plastic drainage plate for preventing clogging of fine soil particles, which includes a drainage plate body 1, wherein the drainage plate body 1 is coated with a filter membrane 14, the drainage plate body 1 is provided with a strip-shaped fine groove 2, a plurality of conductive wires 3 are embedded in the strip-shaped fine groove 2, each conductive wire 3 is in a closed loop, and the conductive wires 3 in the strip-shaped fine groove are connected to an external power supply 7 by embedding external wires in a drainage pipe 4. The external wire comprises an anode conductive wire 5 and a cathode conductive wire 6, the conductive wires 3 in the strip-shaped thin grooves on the drainage plate body are respectively connected with the anode conductive wire 5 and the cathode conductive wire 6, and the anode conductive wire 5 and the cathode conductive wire 6 are respectively connected with an external power supply 7.
When the vacuum preloading method is used for treating the lake dredging sludge, when the drainage plate 1 pumps water, the filter membrane on the drainage plate 1 cannot filter excessively fine soil particles, and some larger soil particles can be adsorbed on the filter membrane 14, so that the permeability of the filter membrane is reduced, meanwhile, compact soil columns are formed on the periphery of the drainage plate 1, the drainage plate is blocked, so that the strength of a soil body close to the drainage plate is high, and the drainage consolidation effect of the soil body between the drainage plates 1 is poor. The drainage plate of the invention is provided with a plurality of copper conductive wires 3 forming loops in the long strip-shaped thin groove inside, and because the fine particles of the cohesive soil have the charged property. Therefore, after the copper conductor wire is electrified by an external power supply, due to the principle that two charged substances repel each other, fine soil particles which cannot be filtered by the filter membrane and larger soil particles adsorbed on the filter membrane of the drainage plate are repelled out, so that the phenomena of filter membrane 14 blockage, drainage plate clogging and filter membrane permeability reduction are avoided.
The invention discloses a construction method for treating lake dredging sludge by using a vacuum preloading method of a plastic drainage plate for preventing micro soil particles from being blocked, which comprises the following steps:
1) preparing a drainage plate, wherein a plurality of conductive wires 3 are arranged in a strip-shaped fine groove 2 of the drainage plate, each conductive wire 3 is a closed loop, the conductive wires 3 are respectively divided into two parts and are respectively connected with two branch conductive wires, the two branch conductive wires are respectively an anode conductive wire 5 and a cathode conductive wire 6, a water guide pipe 8 is arranged at the top of the drainage plate, the branch conductive wires penetrate through the water guide pipe 8, and a filter membrane 14 is coated on the outer side of the drainage plate 1;
2) measuring and paying off;
3) and laying the drainage plates 1, and burying all the drainage plates 1 into the sand cushion. The water guide pipes 8 of all the drainage plates are connected with the pumping and discharging pipe 4 in a converging manner, the two branch conductive wires sequentially penetrate through the water guide pipes 8 and the pumping and discharging pipe 4 to be connected with an external power supply 7, and the outer end of the pumping and discharging pipe 4 is provided with a drainage pipe 9 and is connected with a vacuum pump 10 through the drainage pipe 9;
4) paving a gravel cushion layer 11 in a vacuum preloading range, wherein the paving mode adopts manual block paving;
5) opening a vacuum pump 10 and an external power supply 7, after the copper conducting wire 3 is electrified by the external power supply, repelling fine soil particles which cannot be filtered by the filter membrane and larger soil particles adsorbed on the filter membrane of the drainage plate, so that the filter membrane cannot be blocked, the drainage plate 1 is blocked, the permeability of the filter membrane is reduced, vacuumizing and pumping and filling the seal membrane are started, and when the vacuum degree reaches and stabilizes to be more than 80kpa, entering a normal pre-pressing stage;
6) the vacuum preloading range is surmounted 15.
Referring to fig. 5 to 8, a second embodiment of the present invention provides a plastic drainage plate 1 for preventing clogging of fine soil particles, which is substantially the same as the first embodiment except that: the conductor wire 3 in the long-strip-shaped fine groove on the drainage plate body is divided into two parts and is respectively connected with the branch conductor wires 12, the two branch conductor wires 12 are respectively connected with an external power supply, the external power supply is a switchable positive and negative power supply, and the conductor wire 3 in the long-strip-shaped fine groove is switched between connection with the positive power supply and the negative power supply by switching the positive and negative electrodes. The external power supply 7 is connected with a power supply positive and negative pole switch or a positive and negative pole switching relay 13, the two branch circuit conducting wires 12 are connected with the power supply positive and negative pole switch or the positive and negative pole switching relay 13, and the positive pole and the negative pole of the two branch circuit conducting wires 12 are switched through the power supply positive and negative pole switch or the positive and negative pole switching relay 13.
The two branch conductive wires 12 comprise a first branch conductive wire 16 and a second branch conductive wire 17, when the lake dredging sludge is treated by the vacuum preloading method, when the plastic drainage plate pumps water, the filter membrane 14 on the plastic drainage plate cannot filter excessively fine soil particles, and some larger soil particles can be adsorbed on the filter membrane 14, the fine cohesive soil particles have an electric property, and the cohesive soil particles may have positive charges or negative charges. After the external power supply is electrified, the first branch conductive wire 16 has positive charges, the second branch conductive wire 17 has negative charges, the conductive wire connected with the first branch conductive wire 16 is positive, and according to the principle that like-grade repulsion and unlike-grade attraction are realized, the clay particles with the positive charges corresponding to the position of the drain board are repelled out. The conductive wire connected with the second branch conductive wire 17 is a negative electrode, and the negative electrode conductive wire repels the clay particles with negative charges at the position corresponding to the drain board. After the completion, the positive and negative electrodes of the two branch conductive wires 12 are switched by the power supply positive and negative electrode switch or the positive and negative electrode switching relay 13. After switching, the positive charge of the first branch line conducting wire 16 is switched to the negative charge, and the clay particles with the negative charge at the position corresponding to the drainage plate are repelled. The original negative charge of the second branch electric wire 17 is switched to the positive charge, and the clay particles with the positive charge at the position corresponding to the drainage plate are repelled. Through the switching of a positive pole switch and a negative pole switch of a power supply or a positive pole switching relay, the two parts of electric leads are mutually switched in the positive pole and the negative pole, and soil particles which cannot be filtered on the filter membrane or are adsorbed on the filter membrane and have positive charges and negative charges are repelled out, so that the phenomena of filter membrane blockage, drainage body clogging and filter membrane permeability reduction are avoided.
Claims (8)
1. The utility model provides a prevent stifled plastics drain bar of small soil particle silts up, includes the drain bar body, and the drain bar body cladding has filter membrane, characterized by: the drain bar body is provided with a long strip-shaped fine groove, a plurality of conducting wires are embedded in the long strip-shaped fine groove, and the conducting wires are connected with an external power supply.
2. The plastic drainage plate for preventing the clogging of fine soil particles as claimed in claim 1, wherein: the conductor wires in the strip-shaped fine grooves on the drainage plate body are respectively connected with the positive conductor wire and the negative conductor wire, and the positive conductor wire and the negative conductor wire are respectively connected with an external power supply.
3. The plastic drainage plate for preventing the clogging of fine soil particles as claimed in claim 1, wherein: the conductor wire in the long-strip-shaped fine groove on the drainage plate body is divided into two parts and is respectively connected with the branch conductor wires, the branch conductor wires are respectively connected with the positive electrode and the negative electrode of an external power supply, the external power supply is a switchable positive electrode and negative electrode power supply, and the conductor wire in the long-strip-shaped fine groove is switched between connection with the positive electrode power supply and the negative electrode power supply by switching the positive electrode and the negative electrode.
4. The plastic drainage plate for preventing the clogging of fine soil particles as claimed in claim 1, wherein: and the conductive wire in the strip-shaped thin groove is connected with the external power supply by embedding an external wire in the pumping and discharging pipe.
5. The plastic drainage plate for preventing fine soil particles from being clogged up as claimed in claim 1, 2, 3 or 4, wherein: the conductive wire is in a closed loop.
6. The construction method of the plastic drainage plate for preventing the clogging of the micro soil particles is characterized by comprising the following steps: the steps are as follows,
(1) preparing a drainage plate, wherein a plurality of conductive wires are arranged in a long strip-shaped fine groove of the drainage plate, each conductive wire is a closed loop, the plurality of conductive wires are respectively divided into two parts and are respectively connected with two branch conductive wires, a water guide pipe is arranged at the top of the drainage plate, the branch conductive wires penetrate through the water guide pipe, and a filter membrane is coated on the outer side of the drainage plate;
(2) measuring and paying off;
(3) laying drainage plates, embedding all the drainage plates into a sand cushion layer, wherein water guide pipes of all the drainage plates are connected with a pumping pipe in a converging manner, the two branch conductive wires sequentially penetrate through the water guide pipes and the pumping pipe to be connected with an external power supply, and the outer end of the pumping pipe is provided with a drainage pipe which is connected with a vacuum pump through the drainage pipe;
(4) paving a gravel cushion layer in a vacuum preloading range, wherein the paving mode adopts manual block paving and flattening;
(5) starting to vacuumize, and entering a normal pre-pressing stage when the vacuum degree under the film reaches and stabilizes above 80 kpa;
(6) and (5) carrying out stacking loading on the vacuum preloading range.
7. The method for constructing a plastic drainage plate for preventing fine soil particles from being clogged up as claimed in claim 6, wherein: in step 3, the two branch circuit conducting wires are connected with an external power supply through a power supply positive and negative pole change-over switch.
8. The method for constructing a plastic drainage plate for preventing fine soil particles from being clogged up as claimed in claim 6, wherein: in the step 3, the two branch circuit conducting wires are connected with an external power supply through a positive and negative switching relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010913487.8A CN112144501B (en) | 2020-09-03 | 2020-09-03 | Plastic drainage plate for preventing micro soil particles from being blocked and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010913487.8A CN112144501B (en) | 2020-09-03 | 2020-09-03 | Plastic drainage plate for preventing micro soil particles from being blocked and construction method thereof |
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| Publication Number | Publication Date |
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| CN112144501A true CN112144501A (en) | 2020-12-29 |
| CN112144501B CN112144501B (en) | 2022-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010913487.8A Active CN112144501B (en) | 2020-09-03 | 2020-09-03 | Plastic drainage plate for preventing micro soil particles from being blocked and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115094869A (en) * | 2022-07-12 | 2022-09-23 | 江苏中联路基工程有限公司 | Drainage plate for quickly flocculating suspended particles and manufacturing equipment and process method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58138818A (en) * | 1982-02-12 | 1983-08-17 | Kiyoshi Yamamoto | Vertical draining material and driving method thereof |
| CN102720182A (en) * | 2012-06-15 | 2012-10-10 | 武汉大学 | Conductive plastic drain board |
| CN102995620A (en) * | 2012-12-27 | 2013-03-27 | 大连理工大学 | Vacuum/electroosmosis/magnetic field/stack joint preloading consolidation method of soft foundation |
| CN103628465A (en) * | 2013-11-15 | 2014-03-12 | 河海大学 | Device and method for circulating water discharging blocking prevention through exhausting and inflating sludge |
| CN104209015A (en) * | 2014-07-30 | 2014-12-17 | 昆明理工大学 | Electric-filtering membrane, preparation method and application thereof |
| CN104677799A (en) * | 2015-01-05 | 2015-06-03 | 王军 | Electric-clogging testing device for geotextile |
-
2020
- 2020-09-03 CN CN202010913487.8A patent/CN112144501B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58138818A (en) * | 1982-02-12 | 1983-08-17 | Kiyoshi Yamamoto | Vertical draining material and driving method thereof |
| CN102720182A (en) * | 2012-06-15 | 2012-10-10 | 武汉大学 | Conductive plastic drain board |
| CN102995620A (en) * | 2012-12-27 | 2013-03-27 | 大连理工大学 | Vacuum/electroosmosis/magnetic field/stack joint preloading consolidation method of soft foundation |
| CN103628465A (en) * | 2013-11-15 | 2014-03-12 | 河海大学 | Device and method for circulating water discharging blocking prevention through exhausting and inflating sludge |
| CN104209015A (en) * | 2014-07-30 | 2014-12-17 | 昆明理工大学 | Electric-filtering membrane, preparation method and application thereof |
| CN104677799A (en) * | 2015-01-05 | 2015-06-03 | 王军 | Electric-clogging testing device for geotextile |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115094869A (en) * | 2022-07-12 | 2022-09-23 | 江苏中联路基工程有限公司 | Drainage plate for quickly flocculating suspended particles and manufacturing equipment and process method thereof |
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| CN112144501B (en) | 2022-05-03 |
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