CN103321206B - A kind of high organic content river and lake dredging barged-in fill stockyard drainage technology - Google Patents
A kind of high organic content river and lake dredging barged-in fill stockyard drainage technology Download PDFInfo
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- CN103321206B CN103321206B CN201310276922.0A CN201310276922A CN103321206B CN 103321206 B CN103321206 B CN 103321206B CN 201310276922 A CN201310276922 A CN 201310276922A CN 103321206 B CN103321206 B CN 103321206B
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Abstract
The present invention relates to a kind of high organic content river and lake dredging barged-in fill stockyard drainage technology.The invention belongs to dredging technology field.High organic content river and lake dredging barged-in fill stockyard drainage technology: 1) lay drainage mechanism: lay drainage mechanism in stockyard, drainage mechanism comprises drainage pipe, band drain and vacuum jet mechanism, drainage pipe is laid in stockyard, drainage pipe is connected with band drain, and the drainage pipe port of export connects with vacuum jet pump; Drainage pipe top is equipped with sand cushion and geotextiles; 2) barged-in fill dosing: barged-in fill conveyance conduit is even equipped with chemicals dosing plant dredging and reclamation soil through conveyance conduit conveying, and medicament is joined conveyance conduit by medicating mechanism; 3) pipeline mixing: medicament mixes in pipeline with dredging and reclamation soil; 4) stockyard draining: dosing dredging and reclamation soil sends into stockyard drainage mechanism, is vacuumized carry out draining by vacuum jet mechanism.It is short that the present invention has dewatering time, and dewatering efficiency is high, and stockyard volume is little, land utilization ratio advantages of higher.
Description
Technical field
The invention belongs to dredging technology field, particularly relate to a kind of high organic content river and lake dredging barged-in fill stockyard drainage technology.
Background technology
At present, nearly all urban water-body environmental dredging project is all subject to the restriction of stockyard problem, how to break away from the predicament that tradition dredging heap place is brought, how to reduce stockyard by technological innovation to take up an area, shorten drying time, and the object of minimizing is reached by bed mud mummification, become the technical barrier that water environment treatment field is urgently to be resolved hurrily.The dredging of the large-size lake such as Chaohu, Dian Chi, Taihu Lake, bed mud adopts stockyard to deposit mostly, the method for natural mummification.Have the bed mud of the settling property difference of high organic content feature, after depositing one or two years, although surface mummification, inside is also gluey in water-based.And the present invention is exactly for above this slurry dewatering oozy, make use of the method that physics and chemistry combines, solve environmental dredging stockyard Quick drainage, the time of dehydration is shortened in solution further, improves the technical problem such as dewatering efficiency and the rear sludge treatment of dehydration.
Summary of the invention
The present invention provides a kind of high organic content river and lake dredging barged-in fill stockyard drainage technology for solving in known technology the technical problem that exists.
Present invention employs based on traditional soft base reinforcing technique, the flocculation dewatering technique of the bottom discharge technique improved and improvement is incorporated into the present invention.In the present invention, first in dredging mud, add flocculant and dehydrating agent, mud and medicament are fully mixed in conveyance conduit and then enters stockyard.And at the design aspect of stockyard drainage technology, then adopt bottom discharge technique.Namely first lay drainage pipe at stockyard shakedown, and band drain is attached thereto, drainpipe outlet end is connected with vacuum jet pump simultaneously.Lay sand cushion and geotextiles successively on drainage pipe top again, afterwards mud hydraulic reclamation is entered stockyard.Mud through mixing with flocculant and dehydrating agent can have good sedimentation effect, and the silt deposit in mud is to bottom, and supernatant is then precipitated.Start vacuum jet pump to aspirate, then the moisture in supernatant and mud can be made to be entered in gutter by band drain, and then discharge stockyard by drainage channel, thus accelerate the drainage speed in stockyard.
The high organic content river and lake dredging barged-in fill stockyard drainage technology of the features such as the object of this invention is to provide one, easy construction, dewatering time is short, and dewatering efficiency is high, economical and practical, is beneficial to the rear mud later-stage utilization of dehydration, applied widely.
The technical scheme that high organic content river and lake dredging barged-in fill stockyard of the present invention drainage technology is taked is:
A kind of high organic content river and lake dredging barged-in fill stockyard drainage technology, is characterized in: stockyard drainage technology comprises in stockyard lays drainage mechanism, barged-in fill dosing, pipeline mixing and stockyard drainage procedure.
(1) in stockyard, lay drainage mechanism, drainage mechanism comprises drainage pipe, band drain and vacuum jet mechanism, and drainage pipe is laid in stockyard, and drainage pipe is connected with band drain, and the drainage pipe port of export connects with vacuum jet pump; Drainage pipe top is equipped with sand cushion and geotextiles;
(2) barged-in fill conveyance conduit is even equipped with chemicals dosing plant dredging and reclamation soil through conveyance conduit conveying, and medicament is joined conveyance conduit by medicating mechanism;
(3) medicament mixes in pipeline with dredging and reclamation soil;
(4) dosing dredging and reclamation soil sends into stockyard drainage mechanism, is vacuumized carry out draining by vacuum jet mechanism.After dredging and reclamation completes, the top of band drain is inserted in mud, thus make drainage system form closed-loop path; In top bedding two to three layers of geotextiles, as the separation of drainage system and mud; Then, by vacuum jet, mechanism vacuumizes, and carries out the stockyard draining of high organic content river and lake dredging barged-in fill.
High organic content river and lake dredging barged-in fill stockyard of the present invention drainage technology can also adopt following technical scheme:
Described high organic content river and lake dredging barged-in fill stockyard drainage technology, be characterized in: the medium-sand seam being equipped with 10-50cm thickness bottom stockyard, drainage pipe is embedded in medium-sand seam, and drainage pipe diameter is Φ 30-50mm, and drainage pipe can put into drainage pipeline networks by U-shaped.
Described high organic content river and lake dredging barged-in fill stockyard drainage technology, be characterized in: drainage pipe has transverse and longitudinal branch drain, transverse and longitudinal branch drain at 6m-7m, should be formed drainage pipeline networks by threeway or four-way by spacing, arranges main drain at interval of 3-5 branch drain.
Described high organic content river and lake dredging barged-in fill stockyard drainage technology, be characterized in: band drain is plastic draining board, the vertical colligation of plastic draining board is on drainage pipe.
Described high organic content river and lake dredging barged-in fill stockyard drainage technology, is characterized in: vacuum jet mechanism connects is equipped with discharge casing, and discharge casing is equipped with pump, injection equipment, pump discharge connects injection equipment.
Described high organic content river and lake dredging barged-in fill stockyard drainage technology, be characterized in: injection equipment is equipped with vacuum meter, pump discharge pipeline is equipped with pressure meter.
Described high organic content river and lake dredging barged-in fill stockyard drainage technology, be characterized in: barged-in fill conveyance conduit connects chemicals dosing plant, during barged-in fill dosing, medicating mechanism is divided into flocculant medicating mechanism and dehydrating agent medicating mechanism, flocculant is first joined conveyance conduit by flocculant medicating mechanism, after pipeline mixing, then by dehydrating agent medicating mechanism, dehydrating agent is joined conveyance conduit.
Described high organic content river and lake dredging barged-in fill stockyard drainage technology, be characterized in: flocculant is polyacrylamide, dehydrating agent is silicon oxide compound and allyl alcohol, the feature of flocculant accelerates dredging mud precipitation, and the feature of dehydrating agent can be used as the water transport channel between skeleton maintenance sludge granules.
Described high organic content river and lake dredging barged-in fill stockyard drainage technology, be characterized in: silicon oxide compound is core skeleton, play a supportive role, its physical arrangement is porous light super-fine powder, there is larger specific area, there is very strong absorption property, there is good dispersion suspension performance in water, do not assemble and do not deposit; Allyl alcohol effectively can improve the dispersive property of silicon oxide compound, anti-gathering anti-settling, keeps drainage passage, prevents sludge granules from compressing.
Described high organic content river and lake dredging barged-in fill stockyard drainage technology, is characterized in: during pipeline mixing, be equipped with static mixer in conveyance conduit, and medicament is mixed by static mixer with dredging and reclamation soil.
The advantage that the present invention has and good effect are:
High organic content river and lake dredging barged-in fill stockyard drainage technology is owing to have employed the brand-new technical scheme of the present invention, compared with prior art, present invention achieves the fast dewatering consolidation of stockyard polluted bed mud, thus serve land resources and realize in a short time recycling, improve the utilization rate in soil.Bottom-mud dewatering mummification can make the water content of bed mud reduce rapidly, this can reduce stockyard volume on the one hand greatly, the technique having selected flocculant, additive, soil engineering drainage to combine on the other hand, after making mummification, bed mud has certain permeability, for the useful utilization of later stage dredging markets creates condition.For polluting more serious polluted bed mud, achieve minimizing after dehydration, this is that follow-up harmless treatment and disposing task are provided convenience.
Accompanying drawing explanation
Fig. 1 is high organic content river and lake dredging barged-in fill stockyard drainage technology schematic flow sheet;
Fig. 2 is high organic content river and lake dredging barged-in fill stockyard dewatering installation facade structures schematic diagram;
Fig. 3 is the paving mode schematic diagram of the drainage pipeline networks of high organic content river and lake dredging barged-in fill stockyard dewatering installation;
Fig. 4 is the drainage box structure schematic diagram of high organic content river and lake dredging barged-in fill stockyard dewatering installation;
Fig. 5 is the discharge casing cross-sectional view of high organic content river and lake dredging barged-in fill stockyard dewatering installation;
Fig. 6 is the plan structure schematic diagram of Fig. 5.
In figure, 1, cofferdam, 2, band drain, 3, connect aspirating mechanism, 4, geotextiles, 5, sand cushion, 6, gutter, 7, pump, 8, injection equipment, 9, vacuum meter, 10, pressure meter.
Detailed description of the invention
For summary of the invention of the present invention, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Accompanying drawings 1 to Fig. 6.
Embodiment 1
A kind of high organic content river and lake dredging barged-in fill stockyard drainage technology comprises in stockyard lays drainage mechanism, barged-in fill dosing, pipeline mixing and stockyard drainage procedure.
(1) in stockyard, lay drainage mechanism, drainage mechanism comprises drainage pipe, band drain and vacuum jet mechanism; Drainage pipe is laid in the stockyard be arranged in cofferdam 1, and drainage pipe is connected with band drain 2, and the drainage pipe port of export connects with vacuum jet pump; Drainage pipe top is equipped with sand cushion, and sand cushion 5 top is equipped with geotextiles 4.
Be equipped with the medium-sand seam of 40cm thickness bottom stockyard, drainage pipe is embedded in medium-sand seam, and drainage pipe diameter is Φ 40mm, and drainage pipe can put into gutter 6 net by U-shaped.Drainage pipe has transverse and longitudinal branch drain, and transverse and longitudinal branch drain at 6m-7m, should be formed drainage pipeline networks by threeway or four-way by spacing, arranges main drain at interval of 4 branch drains.Band drain is plastic draining board, and the vertical colligation of plastic draining board is on drainage pipe.
Vacuum jet mechanism connects is equipped with discharge casing, discharge casing is equipped with pump 7, injection equipment 8, and pump 7 exports and connects injection equipment 8.Injection equipment 8 is equipped with vacuum meter 9, and pump 7 export pipeline is equipped with pressure meter 10.
(2) barged-in fill conveyance conduit is even equipped with chemicals dosing plant dredging and reclamation soil through conveyance conduit conveying, and medicament is joined conveyance conduit by medicating mechanism.Medicating mechanism is divided into flocculant medicating mechanism and dehydrating agent medicating mechanism, and flocculant is first joined conveyance conduit by flocculant medicating mechanism, after pipeline mixing, then by dehydrating agent medicating mechanism, dehydrating agent is joined conveyance conduit; Flocculant is polyacrylamide, and dehydrating agent is silicon oxide compound and allyl alcohol;
(3) medicament mixes in pipeline with dredging and reclamation soil, during pipeline mixing, is equipped with static mixer in conveyance conduit, and medicament is mixed by static mixer with dredging and reclamation soil.
(4) dosing dredging and reclamation soil sends into stockyard drainage mechanism, is vacuumized carry out draining by vacuum jet mechanism.After dredging and reclamation completes, the top of band drain is inserted in mud, thus make drainage system form closed-loop path; In top bedding two to three layers of geotextiles, as the separation of drainage system and mud; Then, by vacuum jet, mechanism vacuumizes, and carries out the stockyard draining of high organic content river and lake dredging barged-in fill.
Embodiment 2
The present embodiment is for the concrete stockyard drainage procedure of the dredging silt in region, Taihu Lake:
For Practical Project amount, first determine the dosage of flocculant and dehydrating agent, be equipped with enough medicament addition devices simultaneously.
Set up stockyard drainage system.Be made up of horizontal drainage system and chimney drain.Horizontal drainage system forms by being positioned at sand cushion and bottom discharge pipe network bottom stockyard, wherein bottom sand cushion is the medium coarse sand of 40cm, and be placed on geotextiles, bottom discharge pipe is positioned in sand cushion, bottom discharge arm is arranged with transverse and longitudinal, and spacing should at 6m-7m.Φ 40 chimney filter selected by bottom discharge pipe, utilizes threeway or four-way that transverse and longitudinal branch drain is formed drainage pipeline networks, and arranges main drain at interval of 4 branch drains, the drainage channel that main drain is reserved by earth rock cofferdam, be connected with the jet pump outside cofferdam.Chimney drain is made up of plastic draining board, plastic draining board plays the vertical drainage channeling in the soil body, plastic draining board is with arranged in squares, spacing is 1.0m, bottom it, colligation is on the gutter of bottom, its top shelf is located on on-the-spot scaffold, before Dredged bed mud hydraulic reclamation, installs; After Dredged bed mud hydraulic reclamation is complete, scaffold is put in Dredged bed mud upper strata, make drainage system form closed-loop path.
The setting of suction dewatering installation.According to engineering practice, adopt vacuum jet pump, its single-machine capacity is not less than 7.5kW, and under air inlet closed state, its vacuum pressure is not less than 96kPa, and jet pump is evenly arranged in stockyard surrounding.Finally the draining of jet pump is incorporated in reserved collection ditch, carries out detecting rear qualified discharge.
After engineering construction, testing result shows, and the mud moisture content in stockyard is reduced to 42%, vane shear strength value is all 2.0-3.0kPa, static point resistance 0.18-0.22MPa, sidewall resistance 1.3-1.4MPa, characteristic load bearing capacity is 4-5kPa, and water quality indices all meets relevant criterion.
Claims (4)
1. a high organic content river and lake dredging barged-in fill stockyard drainage technology, is characterized in that: stockyard drainage technology comprises in stockyard lays drainage mechanism, barged-in fill dosing, pipeline mixing and stockyard drainage procedure:
(1) in stockyard, lay drainage mechanism, drainage mechanism comprises drainage pipe, band drain and vacuum jet mechanism, and drainage pipe is laid in stockyard, and drainage pipe is connected with band drain, and the drainage pipe port of export connects with vacuum jet pump; Drainage pipe top is equipped with sand cushion and geotextiles;
(2) barged-in fill conveyance conduit is even equipped with chemicals dosing plant, and dredging and reclamation soil is through conveyance conduit conveying, and medicament is joined conveyance conduit by medicating mechanism;
(3) medicament mixes in pipeline with dredging and reclamation soil;
(4) dosing dredging and reclamation soil sends into stockyard drainage mechanism, is vacuumized carry out draining by vacuum jet mechanism; After dredging and reclamation completes, the top of band drain is inserted in mud, thus make drainage system form closed-loop path; In top bedding two to three layers of geotextiles, as the separation of drainage system and mud; Then, by vacuum jet, mechanism vacuumizes, and carries out the stockyard draining of high organic content river and lake dredging barged-in fill;
Be equipped with the medium-sand seam of 10-50cm thickness bottom stockyard, drainage pipe is embedded in medium-sand seam, and drainage pipe diameter is Φ 30-50mm, and drainage pipe puts into drainage pipeline networks by U-shaped; Drainage pipe has transverse and longitudinal branch drain, spacing 6m-7m, by threeway or four-way, transverse and longitudinal branch drain is formed drainage pipeline networks, arranges main drain at interval of 3-5 branch drain; Band drain is plastic draining board, and the vertical colligation of plastic draining board is on drainage pipe; Vacuum jet mechanism connects is equipped with discharge casing, and discharge casing is equipped with pump, injection equipment, pump discharge connects injection equipment;
Medicating mechanism is divided into flocculant medicating mechanism and dehydrating agent medicating mechanism, and flocculant is first joined conveyance conduit by flocculant medicating mechanism, after pipeline mixing, then by dehydrating agent medicating mechanism, dehydrating agent is joined conveyance conduit.
2. high organic content river and lake dredging barged-in fill stockyard according to claim 1 drainage technology, it is characterized in that: flocculant is polyacrylamide, dehydrating agent is silicon oxide compound and allyl alcohol, the feature of flocculant accelerates dredging mud precipitation, and the feature of dehydrating agent can be used as the water transport channel between skeleton maintenance sludge granules.
3. high organic content river and lake dredging barged-in fill stockyard according to claim 2 drainage technology, it is characterized in that: silicon oxide compound is core skeleton, play a supportive role, its physical arrangement is porous light super-fine powder, there is larger specific area, there is very strong absorption property, there is good dispersion suspension performance in water, do not assemble and do not deposit; Allyl alcohol effectively can improve the dispersive property of silicon oxide compound, anti-gathering anti-settling, keeps drainage passage, prevents sludge granules from compressing.
4. high organic content river and lake dredging barged-in fill stockyard according to claim 1 drainage technology, it is characterized in that: when medicament mixes in pipeline with dredging and reclamation soil, be equipped with static mixer in conveyance conduit, medicament is mixed by static mixer with dredging and reclamation soil.
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| CN104961323B (en) * | 2015-07-07 | 2017-06-09 | 河海大学 | A kind of dredging mud dewatering based on mud transdermally water |
| CN106400826A (en) * | 2016-08-29 | 2017-02-15 | 娄晓曼 | Drainage device for river and lake dredging and reclamation soil yards with high content of organic matters |
| CN108411891A (en) * | 2018-03-15 | 2018-08-17 | 温州大学 | The method of the pre- cured barged-in fill of biological bacteria combined vacuum |
| CN109162242A (en) * | 2018-09-19 | 2019-01-08 | 上海勘测设计研究院有限公司 | Sludge solidification system |
| CN109440761B (en) * | 2019-01-03 | 2023-07-14 | 上海市水利工程集团有限公司 | Multidimensional gas injection anti-clogging integrated comprehensive drainage system for dredging mud storage yard |
| CN109987805B (en) * | 2019-01-10 | 2021-07-13 | 浙江海洋大学 | Channel dredging mud solidification equipment |
| CN110241806B (en) * | 2019-06-30 | 2024-05-14 | 华中科技大学 | Method for forming crust layer on surface of dredging sludge storage yard and crust layer |
| CN110747963A (en) * | 2019-11-22 | 2020-02-04 | 中国电建集团贵阳勘测设计研究院有限公司 | Seepage-preventing membrane upward seepage-guiding system suitable for phosphogypsum storage yard |
| CN111321742A (en) * | 2020-03-08 | 2020-06-23 | 华中科技大学 | Integrated treatment and filling device and method for sludge with high water content |
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