CN101705680B - Construction method of stock dump capable of accelerating dehydration and drying process of dredging deposited sludge - Google Patents
Construction method of stock dump capable of accelerating dehydration and drying process of dredging deposited sludge Download PDFInfo
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- CN101705680B CN101705680B CN2009101983061A CN200910198306A CN101705680B CN 101705680 B CN101705680 B CN 101705680B CN 2009101983061 A CN2009101983061 A CN 2009101983061A CN 200910198306 A CN200910198306 A CN 200910198306A CN 101705680 B CN101705680 B CN 101705680B
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Abstract
The invention relates to a construction method of a stock dump capable of accelerating dehydration and drying process of dredging deposited sludge. One side of the deposited sludge stock dump is provided with an outlet the upper side of which flushes with the top part of the stock dump, and the bottom part thereof is provided with parallel drainage ditch at interval; drain pipes are laid in the drainage ditch and slope towards to the outlet in a certain gradient; water seepage gravels are arranged at the periphery of the drain pipes to avoid the drain pipe from being blocked; the middle part of the drain pipe is provided with a vertical pipeline communicated with an external vacuum system through a collection pipeline on the top surface of the stock dump. After the dredging deposited sludge enters into the stock dump, the sludge deposits at the bottom part, and the clear water overflows from the outlet; in the dehydration and drying process of the deposited sludge, the separated free water content flows into the bottom part of the drainage ditch through a sludge depositing layer, passes through the gravels to enter into the drain pipe, and is discharged from the stock dump after being collected through the drain pipe; the external vacuum system sucks the drain pipe to be in a negative pressure state, thus increasing drain water heads of the deposited sludge of the stock dump and accelerating water removal in the deposited sludge. The construction method of the invention can accelerate the drying process of the deposited sludge in the stock dump, thus shortening the occupied period of the stock dump.
Description
Technical field
The present invention relates to a kind of construction process of dredging the bed mud stockyard, be specifically related to a kind of stockyard construction process that can accelerate to dredge the bottom-mud dewatering drying process, improve the bearing capacity of stockyard bed mud, improve the utilization rate in stockyard.The invention belongs to Environmental Engineering dredging bed mud treatment and disposal technical field.
Background technology
Along with the quickening of expanding economy and process of industrialization, directly enter river course or lake without sanitary sewage and the industrial wastewater suitably handled in a large number, cause China's urban river and lake pollution situation very serious.To the improvement in lake, contaminated river, mainly be to realize with the means of carrying out the polluted bed mud dredging by blocking the external contamination source.The polluted bed mud dredging is that the important step in the engineering is administered in dystrophication, can prevent that the pollutant in the bed mud is discharged in the water body, thereby alleviate degree of contamination to the river Lake Water Body, make the transformation of heavily contaminated water body realization to light pollution, the final catharsis that relies on river Lake Water Body self makes water quality reach normal level.
At present, along with people to the improving constantly of environmental quality requirement, pollute the lake, river and administer object of construction production and constantly increase, the disposal of dealing carefully with of dredging bed mud also seems increasingly important.The moisture content higher (80%-90%) of lake, river dredging bed mud, bulky need make up the bed mud stockyard when dredging on land, is used for interim storage dredging bed mud, thereby can takies a large amount of land resources; On the other hand, contain large amount of organic, pathogenic microorganism and toxic heavy metal element etc. in the dredging bed mud, abandon as if in external environment, arbitrarily piling, corruption easily takes place, distribute foul smell, discharge pathogen, influence environmental beauty and health, even influence the healthy of people.Therefore, need carry out suitable treatment and disposal such as dehydration deodorization to the dredging bed mud, and the dredging bed mud is carried out treatment and disposal, also carry out in the bed mud stockyard, the stockyard is the place that the mummification of dredging bottom-mud dewatering is carried out.Therefore, for the bed mud dredging works, the science in stockyard structure has great importance and acts on.
Present stockyard makes up the work (Tang Baorong of safety aspect such as the structure, antiskid in antiseepage that mostly research be to concentrate on the stockyard, cofferdam, Li Tao .2006, lake pollution by dredging bed mud character and stockyard Engineering Geology Evaluation. Shanxi architecture, 32 (3): 108-109), Chen Xiongfeng etc. have studied the mummification speed (Chen Xiongfeng that quickens the stockyard bed mud by the mode of digging trenches to drain the water away, .2006 such as Jing Yifeng, trench digging active draining is to the influence of environmental dredging stockyard bed mud mummification. Research of Environmental Sciences, 19 (5): 49-53).But owing to be subjected to the restriction of draining head in the bed mud stockyard, arrived the later stage of bed mud mummification, the moisture in the bed mud of stockyard just is difficult to discharge, and bed mud also is difficult to reach the bearing capacity of setting, and the mummification phase of bed mud is also just long more.In this case, the stockyard construction process of dredging bottom-mud dewatering drying process is accelerated in exploitation, and the holding time for shortening the interim stockyard of bed mud in time recovers the stockyard land used, has important use and more practical value.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of stockyard construction process that can accelerate to dredge the bottom-mud dewatering drying process is provided, shorten the holding time of the interim stockyard of dredging bed mud land used, improve the utilization rate in stockyard.
For achieving the above object, the present invention is provided with outfall in bed mud stockyard one side, the outfall upside is concordant with the top, stockyard, offer some parallel ditch at the stockyard bottom interval, lay gutter in the gutter and with certain gradient aspect outfall, the infiltration gravel is placed in the periphery of gutter, causes gutter to stop up to avoid bed mud directly to contact with gutter; Place, gutter centre position is provided with the pipeline that gathers that vertical duct is communicated with the stockyard end face, and makes gutter be in negative pressure state by the external vacuum system.After the dredging bed mud entered the stockyard, sludgd deposition was in the bottom, and primary water then overflows from outfall.After this in the bottom-mud dewatering drying process, the free moisture of separating is gone into the bottom discharge ditch by the precipitating sludge laminar flow, and the gravel of flowing through again enters gutter, discharges the stockyard after gutter is collected.The external vacuum system is pumped to negative pressure state with gutter, thereby increases the draining head of stockyard bed mud, and moisture removes in the acceleration bed mud.
Method of the present invention specifically comprises:
1, the side in the bed mud stockyard is provided with the outfall that width is 0.8～1.2m, bottom, lateral extent stockyard 1～1.2m under the described outfall, and upside is concordant with the top, stockyard.
2, offer some parallel ditch at the stockyard bottom interval, lay gutter in the gutter, gutter is with 0.5% gradient aspect outfall.
3, the infiltration gravel is placed in the periphery of gutter in the gutter, causes the obstruction of gutter to avoid bed mud directly to contact with gutter.
4, at place, the centre position of every gutter vertical duct is set, all vertical duct merge with the external vacuum system and are connected by the pipeline that gathers of stockyard end face, and make gutter be in negative pressure state by the external vacuum system.
Among the present invention, the parallel distance in gutter is 10-15m in the bed mud stockyard, and the width and the degree of depth in gutter are 400mm.
Among the present invention, the gutter diameter that lays in the gutter is 200mm, and gutter employing diameter is that the reinforcing bar of 6mm is made skeleton, skeleton coated outside nonwoven.
Among the present invention, the infiltration gravel that diameter is 10-20mm is laid in the outside of gutter in the gutter, as the infiltration topping.
Among the present invention, the centre position in the gutter is provided with a vertical closes ducts, and the conduit material is PVC, and diameter is 50mm.This closes ducts can be connected with the external vacuum suction system to keep the negative pressure state of gutter.
The dredging bed mud enters in the bed mud stockyard, carries out mud-water separation, and the bed mud of precipitation is deposited on the bottom, stockyard, and primary water then overflows from the top outfall.Along with the increase that enters bed mud quantity in the stockyard, the thickness of precipitation bed mud increases gradually, until reaching design altitude, at this moment, the dredging end-of-job.After this, the inner bed mud in stockyard has entered dehydration and drying process, and the free moisture of separating in the bed mud flows under the influence of gravity into the bottom discharge ditch by the precipitating sludge layer, and the gravel of flowing through again enters gutter, discharges the stockyard after gutter is collected.
In this process, all vertical duct are converged by the pipeline that gathers at top, stockyard, be connected to the external vacuum system, effect by external vacuum system (vacuum pump), the gutter of bottom, stockyard is pumped to negative pressure state, thereby improve the discharging head of stockyard bed mud internal moisture, moisture removes in the acceleration bed mud.
The present invention has following advantage:
1. whole drainage system is made up of the outfall system on top and the gutter system of bottom, enter the initial stage in stockyard at the dredging bed mud, the bed mud of precipitation is in the stockyard bottom deposit, large batch of primary water then can overflow by the outfall on top apace, for the follow-up dredging bed mud that enters keeps the enough mud-water separation time; The drainage system of bottom then can quicken removing of the dried up branch in inner bed mud middle reaches, stockyard in later stage that dredging works is carried out and in a period of time after finishing, and improves the dehydration and drying speed of stockyard bed mud.
2. by vacuum pick-up system being introduced bottom, stockyard drainage system, can improve the vacuum in the drainage pipe, increase the draining head, improve drainage rates, shorten the bed mud mummification cycle.
3. drainage system processing is simple and easy, easy for installation, is highly suitable for the structure in dredging bed mud stockyard, lake, China river.
The present invention can accelerate the drying process of bed mud in the stockyard, shortens the cycle that takies in stockyard, is convenient to the fast quick-recovery of interim stockyard land used.
Description of drawings
Structural plan, the stockyard figure that Fig. 1 makes up for invention.
Among Fig. 1,1 is the bed mud stockyard, and 2 is outfall, and 3 is the gutter, and 4 is gutter, and 6 is vertical duct, and 7 for gathering pipeline.
The stockyard section of structure that Fig. 2 makes up for invention.
Among Fig. 2,1 is the bed mud stockyard, and 2 is outfall, and 3 is the gutter, and 4 is gutter, and 5 are the infiltration gravel, and 6 is vertical duct, and 7 for gathering pipeline.
The specific embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is further described.Following examples do not constitute limitation of the invention.
The stockyard structure that the present invention makes up as depicted in figs. 1 and 2, comprise, the top outfall 2 of stockyard drainage system, gutter, bottom 3, the gutter of placing in the gutter 4, the infiltration gravel 5 that lays in the gutter, vertical duct 6, vertical duct gather pipeline 7, the pipeline 7 that gathers of vertical duct is connected to the external vacuum system.
As shown in Figure 1 and Figure 2, the present invention has made up drainage system in the bed mud stockyard, and drainage system is made up of with the gutter 3 of bottom the outfall 2 on top.
At first the side in bed mud stockyard 1 is provided with outfall 2, bottom, the following lateral extent stockyard 1～1.2m of outfall 2, and the upside of outfall 2 is concordant with the top, stockyard.The width of outfall 2 is 0.8～1.2m.
Offer some parallel ditch 3 at the bottom interval in bed mud stockyard 1, lay gutter 4 in the gutter 3, gutter 4 is with certain gradient (being generally 0.5%) aspect outfall.
In gutter 3, infiltration gravel 5 is placed in the periphery of gutter 4, causes the obstruction of gutter to avoid bed mud directly to contact with gutter 4.
Place, centre position at every gutter 4 is provided with vertical duct 6, and the lower end of vertical duct 6 is connected with gutter 4, and the upper end extends to more than the end face in stockyard.All vertical duct 6 merge to get up to be connected with the external vacuum system by the pipeline 7 that gathers of stockyard end face.
The dredging bed mud enters in the bed mud stockyard 1, carry out mud-water separation, the bed mud of precipitation is deposited on the bottom in stockyard 1, primary water then overflows from top outfall 2, along with the increase that enters bed mud quantity in the stockyard 1, the thickness of precipitation bed mud increases gradually, until reaching design altitude, at this moment, dredging end-of-job.After this, stockyard 1 inner bed mud has entered dehydration and drying process, and the free moisture of separating in the bed mud flows under the influence of gravity into bottom discharge ditch 3 by sludge blanket, and the gravel 5 of flowing through again enters gutter 4, discharges stockyard 1 after gutter 4 is collected.In this process, the pipeline 7 that gathers of vertical duct is connected to the external vacuum system, effect by external vacuum system (vacuum pump), vertical duct 6 is pumped to negative pressure, also can make gutter 4 be in negative pressure state, thereby improve the draining head of residual moisture in the bed mud of stockyard, increase drainage power, can quicken removing of moisture in the bed mud, accelerate the dehydration and drying process of bed mud.
It below is a concrete application example of the present invention.
Bed mud dredging work is carried out in Minhang District black smelly river course in Shanghai City.The other dredging bed mud stockyard that makes up in the river course is used to be received the dredging bed mud.The bottom-mud dewatering drying method adopts two-part to mix, react deodorization and dehydration method (patent of invention, application number: 200810201257.8).The stockyard planar dimension is 20x20m, and the degree of depth is 3m.The bottom, stockyard is provided with two gutters, and spacing is 10m, and the gutter width is 0.4m, and the degree of depth is 0.4m.Wherein the gutter diameter of Fang Zhiing is 200mm, and it is 0.5% that gutter lays the gradient.Laid the gravel by nature permeable layer of 10-20mm particle diameter between gutter and the gutter.The vertical duct that respectively to connect a diameter respectively at place, the centre position of two gutters be 50mm extends to the top, stockyard, and two vertical duct are that the pipeline that gathers of 70mm couples together by a diameter then, are connected with a vacuum pump.
After the river bottom mud dredger finishes, begin to start vacuum system, keep stockyard bottom discharge pipeline to be in negative pressure state, move 8 hours every day, after 2 months, about the whole sinking 15mm in top layer ground, stockyard, this moment, bearing capacity of foundation soil can reach 30kPa after testing, satisfied earth outward transport requirement.
Claims (5)
1. the stockyard construction process that can accelerate to dredge the bottom-mud dewatering drying process is characterized in that comprising:
1) side in the bed mud stockyard is provided with the outfall that width is 0.8～1.2m (2), and described outfall (2) is bottom, lateral extent stockyard 1～1.2m down, and upside is concordant with the top, stockyard;
2) offer some parallel ditch (3) at the stockyard bottom interval, lay gutter (4) in gutter (3), gutter (4) is with 0.5% gradient aspect outfall;
3) infiltration gravel (5) is placed in the periphery of gutter (4) in gutter (3), causes the obstruction of gutter to avoid bed mud directly to contact with gutter (4);
4) at the place, centre position of every gutter (4) vertical duct (6) is set, all vertical duct (6) merge to get up to be connected with the external vacuum system by the pipeline (7) that gathers of stockyard end face, and make gutter (4) be in negative pressure state by the external vacuum system.
2. according to the stockyard construction process that can accelerate to dredge the bottom-mud dewatering drying process of claim 1, the parallel distance that it is characterized in that described gutter (3) is 10-15m, and the width and the degree of depth of gutter (3) are 400mm.
3. according to the stockyard construction process that can accelerate to dredge the bottom-mud dewatering drying process of claim 1, the diameter that it is characterized in that described gutter (4) is 200mm, and gutter (4) is that skeleton and the outsourcing nonwoven that the reinforcing bar of 6mm is done constitutes by diameter.
4. according to the stockyard construction process that can accelerate to dredge the bottom-mud dewatering drying process of claim 1, the diameter that it is characterized in that described infiltration gravel (5) is 10-20mm.
5. according to the stockyard construction process that can accelerate to dredge the bottom-mud dewatering drying process of claim 1, the material that it is characterized in that described vertical duct (6) is PVC, and diameter is 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101983061A CN101705680B (en) | 2009-11-05 | 2009-11-05 | Construction method of stock dump capable of accelerating dehydration and drying process of dredging deposited sludge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101983061A CN101705680B (en) | 2009-11-05 | 2009-11-05 | Construction method of stock dump capable of accelerating dehydration and drying process of dredging deposited sludge |
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| CN101705680A CN101705680A (en) | 2010-05-12 |
| CN101705680B true CN101705680B (en) | 2011-06-29 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967821B (en) * | 2010-10-19 | 2012-02-22 | 上海交通大学 | Dredged sediment dewatering and drying stockyard and establishment method thereof |
| CN102287002A (en) * | 2011-05-19 | 2011-12-21 | 江苏聚慧科技有限公司 | Drainage system for rapidly draining water from silt stacking yards |
| CN102926375A (en) * | 2011-08-10 | 2013-02-13 | 同济大学 | Sludge discharge field constructing method for speeding up dehydration, solidification and stabilization of dredged sediment |
| CN102392438A (en) * | 2011-10-31 | 2012-03-28 | 上海交通大学 | Dehydration drying method capable of improving bearing capacity of dredged sediment stock dump |
| CN102505751A (en) * | 2011-11-18 | 2012-06-20 | 中交天津港航勘察设计研究院有限公司 | Environment-friendly multi-stage bidirectional disposal site remained water overflow device |
| CN103806431B (en) * | 2012-11-09 | 2016-05-11 | 世盟国际股份有限公司 | A kind of soft base is made ground crust structure and making engineering method thereof fast |
| CN103232149B (en) * | 2013-04-15 | 2014-01-15 | 天津科技大学 | Environmental protection dredging stockyard sediment original position rapid dehydration system |
| CN105821892A (en) * | 2016-03-25 | 2016-08-03 | 河南省中原水利水电工程集团有限公司 | Horizontal screen pipe dewatering system and treatment method |
| CN106430907A (en) * | 2016-10-21 | 2017-02-22 | 江西洁地环境治理生态科技有限公司 | Bottom mud dredging treatment system |
| CN110294584B (en) * | 2019-07-23 | 2024-02-02 | 中交上海航道勘察设计研究院有限公司 | Device and method for consolidating sludge in different positions by utilizing dead weight |
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2009
- 2009-11-05 CN CN2009101983061A patent/CN101705680B/en not_active Expired - Fee Related
Non-Patent Citations (2)
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| 陈雄峰.开沟主动排水对环保疏浚堆场底泥干化的影响.《环境科学研究》.2006,第19卷(第5期), * |
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