CN102926375A - Sludge discharge field constructing method for speeding up dehydration, solidification and stabilization of dredged sediment - Google Patents
Sludge discharge field constructing method for speeding up dehydration, solidification and stabilization of dredged sediment Download PDFInfo
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- CN102926375A CN102926375A CN2011102288626A CN201110228862A CN102926375A CN 102926375 A CN102926375 A CN 102926375A CN 2011102288626 A CN2011102288626 A CN 2011102288626A CN 201110228862 A CN201110228862 A CN 201110228862A CN 102926375 A CN102926375 A CN 102926375A
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Abstract
The invention relates to a sludge discharge field constructing method for speeding up dehydration, solidification and stabilization of dredged sediment. The method comprises the following steps of: paving a strengthened drainage layer on each inner side slope of a cofferdam around the sludge discharge field, wherein a drainage collecting pipe is arranged at the bottom of each strengthened drainage layer to form a side slope drainage system; and arranging upright drainage walls in the middle of the sludge discharge field, wherein drainage collecting pipes are arranged below the drainage walls to form a drainage wall drainage system, namely the side slope drainage system and the drainage wall drainage system are constructed to speed up the dehydration, solidification and stabilization of the dredged sediment of the sludge discharge field. Compared with the prior art, the upper layer of clear liquid of sludge is discharged through a recession pool, and the water in the sludge is discharged through the side slope drainage system and the drainage wall drainage system, so that the area of the drainage working area is increased, the internal drainage effect of the sludge is improved, the drying process of the sludge in the sludge discharge field is greatly shortened, the time of solidification and stabilization of sediment is shortened, the solidification and stabilization speed of the sediment introduced into the sludge discharge field is improved, the use efficiency of the sludge discharge field is improved, and the occupied area of the sludge discharge field is reduced.
Description
Technical field
The present invention relates to a kind of construction process of field of environment engineering device, especially relate to and a kind ofly accelerate to dredge bottom-mud dewatering and solidify and to stablize the construction process of spoil disposal field.
Background technology
River and lake are the valuable sources that the mankind depend on for existence and development, its function is mainly manifested in several aspects such as water supply, flood discharge, shipping, aquaculture and Defences, yet, be subjected to the impact of operation of nature and/or mankind's activity, deposit in river and the lake and/or pollutant can deposit gradually, cause it to lose part or all of function.Dredging is cleared up the deposit of river course and lakebed exactly, to recover the normal function of water body.
Traditionally, the purpose of dredging mainly is flood discharge, the Navigation capacity in order to recover river and lake.In recent years, because the mankind's activity eutrophication process of having aggravated the natural waters such as lake, earth's surface, river, a large amount of nitrogen, phosphorus, organic substance, even heavy metal enters river and lake, makes these water bodys lose the function of water supply and aquaculture; The deposition of large amount of organic matter has been accelerated the sediment accumulation rate of water body, makes river and lake lose the function of flood discharge and shipping; And polluted-water is corrupt, distributes foul smell, grows in a large number pathogenic microorganism and mosquitos and flies, heavy damage the natural ecological environment of water body.Main purpose to these polluted-water dredgings then is the pollutant of removing in the water body, promotes ecological reconstruction, recovers the ecological functions of water body, therefore is called as environmental dredging.Environmental dredging produces the higher dredging bed mud of a large amount of pollutant levels, and this bed mud is difficult for realizing mud-water separation under field conditions (factors), passive dehydration difficulty, and curing is long stable period, takies a large amount of land resourcess.
At present, people have attempted several different methods and have promoted that the curing of environmental dredging bed mud is stable, mainly comprise: vacuum/preloading, dosing machinery evaporation, bottom surface filtering layer/closed drainage method and the surface method that digs trenches to drain the water away also has geotextile tube bag method and electro-osmosis well point method etc. in addition.In these methods, vacuum/preloading, dosing machinery evaporation, the surface methods such as method and electro-osmosis well point that dig trenches to drain the water away all need to consume Assistant, electric energy, or large-scale plant equipment, somewhat expensive, the economic capability present with China is difficult to large-scale application; Other two kinds of methods; bottom surface filtering layer/closed drainage method and geotextile tube bag method are constructed angle from the science of spoil disposal field; the curing that realizes accelerating bed mud is stable; its expense is relatively low; yet carry out in the mud gradually along with draining that a large amount of fine particles of sedimentation can stop up filtering layer gradually; along with the quick variation of prolongation drainage effect meeting of water discharge time, therefore, bottom surface filtering layer/closed drainage method generally is suitable for bed mud and stacks the little small-sized spoil disposal field of thickness.Stack draining after geotextile tube bag method utilization infiltration soil engineering bag loads bed mud, the soil engineering bag consumption is large, and construction sequence is complicated, is only suitable for utilizing the dredging bed mud to construct the specific occasions such as water conservancy project cofferdam, is difficult to large-scale application.
The relevant innovative approach of accelerating the stable spoil disposal field construction method of dredging bottom-mud dewatering curing, Chinese patent CN200910198306.1 discloses a kind of stockyard construction process that can accelerate to dredge the bottom-mud dewatering drying process, the method is drawn to negative pressure state by the external vacuum system with the gutter of stockyard bottom, thereby increase the draining head of bed mud, moisture removes in the acceleration bed mud.Chinese patent CN 201010510573.0 discloses a kind of dredging bottom-mud dewatering mummification stockyard and construction process thereof, and the method is ventilated by the gutter of outside blast fan to the bottom, stockyard, promotes the air in tube circulation, thereby reaches the purpose of accelerating the bed mud mummification.Above-mentioned two kinds of methods, because the use of outside electromechanical equipment, cost of production is higher, has reduced the feasibility of practical application.
Based on present present situation, exploitation is accelerated bed mud and is solidified stable dredging bed mud spoil disposal field science construction method, for saving cost, shorten the occupation of land time of spoil disposal field and reducing the latency environment hidden danger of spoil disposal field, has important practice significance.
Summary of the invention
Purpose of the present invention is exactly a kind of area that greatly increases the drainage works district that provides for the defective that overcomes above-mentioned prior art existence, strengthen the internal drainage effect of mud, accelerate the to march into the arena curing stabilized speed of bed mud, improve the utilization ratio of spoil disposal field, the acceleration dredging bottom-mud dewatering that reduces spoil disposal field floor space solidifies stablizes the construction process of spoil disposal field.
Purpose of the present invention can be achieved through the following technical solutions:
A kind ofly accelerate to dredge bottom-mud dewatering and solidify and to stablize the construction process of spoil disposal field, it is characterized in that, described method is established the reinforcement drainage blanket on the interior side slope upper berth in periphery cofferdam, spoil disposal field, this reinforcement drainage blanket bottom arranges the drainage collection pipe, the drainage collection pipe is placed in the gutter, fill gravel all around, consist of the side slope drainage system; At middle part, spoil disposal field vertical draining wall is set, under this draining wall the drainage collection pipe is set, the drainage collection pipe is placed in the gutter, fills gravel all around, consists of draining wall drainage system, namely finishes the structure to the spoil disposal field.
Described side slope drainage system is located on the interior side slope in cofferdam, is made of the drainage collection pipe of strengthening drainage blanket and being arranged on its underpart, and described reinforcement drainage blanket comprises impervious barrier, drain measure layer and the permeable layer of laying successively.
Described draining wall drainage system is made of spud pile, vertical draining wall and the drainage collection pipe beaten in bottom, spoil disposal field.
Described spud pile is a kind of in wooden, bamboo matter or the iron and steel material.
Described vertical draining wall is made of support frame, filler and infiltration filtering material, and described support frame is a kind of in iron net, bamboo braid or the wooden bracing frame; Described filler is a kind of in seepage brick, gravel or the porous building brick; Described filtering material can be with a kind of in the nonwoven of infiltration geotextiles or infiltration.
Described drainage collection pipe diameter is 100～250mm, offers the water seepage hole that diameter is 4～8mm on the pipe, and laying the gradient is 0.5%, slope aspect delivery port, the tubing of drainage collection pipe are pvc pipe, and pipe is wrapped with the infiltration geotextiles or spins cloth without infiltration, be placed in the gutter, fill gravel all around.
Compared with prior art, the present invention has following advantage:
1, compares with bottom surface drain pipe system commonly used, side slope drainage system and draining wall drainage system have significantly increased effective workspace area of draining, along with the increase of the bed mud height of marching into the arena, constantly have fresh draining face to start working, participate in draining, improved the drainage rates of the bed mud of marching into the arena; Being arranged vertically of filtering layer can effectively be slowed down fine particle to the sedimentation obstruction of filtering layer in the vertical draining wall, overcome to a certain extent the blockage problem of bottom surface draining drainage layer after draining a period of time.
2, vertical draining wall interval in the spoil disposal field arranges, and has increased the contact surface of march into the arena bed mud inside and draining filtering layer, has strengthened the bed mud internal drainage.
Description of drawings
Fig. 1 is the plane structure schematic diagram that the present invention constructs the spoil disposal field;
Fig. 2 is the cross-sectional view that the present invention constructs the spoil disposal field.
Among the figure, 1 to strengthen drainage blanket, 3 for water-break pond, 2 for side slope be that gutter, 4 is that gutter, 5 is vertical draining wall.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Implement the spoil disposal field that the present invention constructs, as depicted in figs. 1 and 2.According to technical scheme of the present invention, comprise: the side slope around the spoil disposal field on the inboard slope, cofferdam is strengthened drainage blanket 2, the vertical draining wall 5 that arranges in, the gutter 3 of side slope bottom and draining wall bottom, gutter 4 in the gutter, spoil disposal just arrange water-break pond 1 after the match.
Implementing the present invention, to carry out the concrete steps that the spoil disposal field makes up as follows: at first, according to the design size of spoil disposal field, adopt and successively ram the mode of building and carry out constructing of cofferdam around the spoil disposal field, and make up water-break pond and withdrawal nozzle in a side of spoil disposal field; Side slope makes up the side slope drainage system in the spoil disposal field, comprising: the laying of side slope drainage blanket, gutter excavation, gutter laying and gravel are filled; Make up draining wall drainage system in the middle of the spoil disposal field, comprising: vertical draining wall support frame piling is fixing, the infiltration filtering material coats, gutter excavation at the bottom of the draining wall lower field, gutter is laid and gravel is filled.
Implementation dredging bed mud solidifies stable drainage pattern can be divided into two kinds, and the one, the march into the arena discharge of rear a large amount of sedimentations upper strata primary water of bed mud, the 2nd, the discharge of mud internal water.Bed mud sedimentation upper strata primary water is easily discharged fast, and the discharge speed of bed mud internal water is the decisive step that bed mud solidifies stabilized speed, therefore, this patent proposes the structure by side slope drainage system and draining wall drainage system, realizes accelerating the discharge of bed mud internal water.Enter in the process of spoil disposal field at the dredging bed mud, after the bed mud sedimentation, the upper strata primary water can be discharged rapidly by withdrawal nozzle; Simultaneously, mud internal water and part upper strata primary water are then discharged by side slope drainage system and draining wall drainage system.In the curing stabilization sub stage of bed mud, internal water is constantly discharged by side slope drainage system and draining wall drainage system in the bed mud.In addition, in the spoil disposal field operation phase, should in time discharge the ponding that rainfall forms in the mud field.
It below is a specific embodiment of the present invention.
In the Sediment Dredging stable curing engineering that certain upper river is carried out, made up a dredging bed mud spoil disposal field at river bank.The inside and outside gradient in cofferdam is 1:1 around the spoil disposal field, the high 3.0m in cofferdam, and cofferdam top width 1.5m, cofferdam top field inside dimension is long 30m, wide 20m.Minor face one middle side part has made up the water-break pond in the spoil disposal field, and the water-break pond is long to be 3.0m, and wide is 1.5m, and the pond is high consistent with cofferdam, spoil disposal field height.The interior side slope in cofferdam makes up the side slope drainage system around in the spoil disposal field, comprise: the anti-seepage geomembrane of laying successively, drain measure straw mats and infiltration geotextiles, side slope drainage blanket bottom arranges the gutter that is equipped with the drainage collection hole, gutter diameter 200mm, the gradient with 0.5% is placed in the gutter, and middle gravel is filled.Uniformly-spaced made up the vertical draining wall of twice drainage system in inside, spoil disposal field, comprise: the draining wall skeleton structure that the double-deck bamboo weaving of being fixed by timber consists of, filling porous building brick in the double-deck bamboo weaving, bamboo weaving outer cladding infiltration geotextiles, the body of wall bottom arranges the gutter that is equipped with the drainage collection hole, gutter diameter 200mm, the gradient with 0.5% is placed in the gutter, and middle gravel is filled.
Enter in the precipitation process of spoil disposal field at mud, a large amount of supernatant liquids are mainly discharged by withdrawal nozzle, simultaneously side slope drainage system and the draining wall drainage system draining of also starting working; Solidifying the stabilization sub stage, withdrawal nozzle can in time be discharged the ponding that rainfall forms in the mud field, and the internal water in the bed mud is then discharged by side slope drainage system and draining wall drainage system incessantly.Spoil disposal field bed mud was marched into the arena complete operation after 1 month, top, spoil disposal field bulk settling 360mm, move after 2 months, top, spoil disposal field bulk settling moves after 4 months to 600mm, and top, spoil disposal field bulk settling is to 780mm, sediments solidifies cracking, and the spoil disposal field enters stationary phase.
After the spoil disposal field enters stationary phase, solidifying stable excavation rainwater head, bed mud surface, loosen the soil and broadcast sowing grass seeds, bed mud surface, the left and right sides on the 15th is covered fully by the turf vegetation.
A kind ofly accelerate to dredge bottom-mud dewatering and solidify and to stablize the construction process of spoil disposal field, the method is established the reinforcement drainage blanket on the interior side slope upper berth in periphery cofferdam, spoil disposal field, this reinforcement drainage blanket bottom arranges the drainage collection pipe, strengthen drainage blanket and comprise the impervious barrier of laying successively, drain measure layer and permeable layer, the drainage collection pipe is placed in the gutter, fill gravel all around, consist of the side slope drainage system, at middle part, spoil disposal field vertical draining wall drainage system is set simultaneously, this drainage system uses wooden spud pile, vertical draining wall is by support frame iron net, the infiltration geotextiles of filler seepage brick and outsourcing consists of, under this draining wall the drainage collection pipe is set, this pipe diameter is 100mm, offers the water seepage hole that diameter is 4mm on the pipe, and laying the gradient is 0.5%, the slope aspect delivery port, the tubing of drainage collection pipe is pvc pipe, and pipe is wrapped with the infiltration geotextiles and is placed in the gutter, fills gravel all around.，
A kind ofly accelerate to dredge bottom-mud dewatering and solidify and to stablize the construction process of spoil disposal field, the method is established the reinforcement drainage blanket on the interior side slope upper berth in periphery cofferdam, spoil disposal field, this reinforcement drainage blanket bottom arranges the drainage collection pipe, strengthen drainage blanket and comprise the impervious barrier of laying successively, drain measure layer and permeable layer, the drainage collection pipe is placed in the gutter, fill gravel all around, consist of the side slope drainage system, at middle part, spoil disposal field vertical draining wall drainage system is set simultaneously, this drainage system uses bamboo matter spud pile, as support frame, gravel is as filler by bamboo braid for vertical draining wall, be surrounded by the infiltration nonwoven outward, under this draining wall the drainage collection pipe be set, the pipe diameter is 250mm, offer the water seepage hole that diameter is 8mm on the pipe, laying the gradient is 0.5%, the slope aspect delivery port, the tubing of drainage collection pipe is pvc pipe, pipe is wrapped with without infiltration and spins cloth, is placed in the gutter, fills gravel all around.
Claims (6)
1. one kind is accelerated to dredge bottom-mud dewatering and solidifies and stablize the construction process of spoil disposal field, it is characterized in that, described method is established the reinforcement drainage blanket on the interior side slope upper berth in periphery cofferdam, spoil disposal field, the drainage collection pipe is set, formation side slope drainage system bottom this reinforcements drainage blanket; At middle part, spoil disposal field vertical draining wall is set, under this draining wall the drainage collection pipe is set, consist of draining wall drainage system, namely finish the structure to the spoil disposal field.
2. according to claim 1ly a kind ofly accelerate to dredge bottom-mud dewatering and solidify and to stablize the construction process of spoil disposal field, it is characterized in that, described side slope drainage system is located on the interior side slope in cofferdam, be made of the drainage collection pipe of strengthening drainage blanket and being arranged on its underpart, described reinforcement drainage blanket comprises impervious barrier, drain measure layer and the permeable layer of laying successively.
3. according to claim 1ly a kind ofly accelerate to dredge bottom-mud dewatering and solidify and stablize the construction process of spoil disposal field, it is characterized in that, described draining wall drainage system is made of spud pile, vertical draining wall and the drainage collection pipe beaten bottom the spoil disposal field.
4. according to claim 3ly a kind ofly accelerate to dredge bottom-mud dewatering and solidify and to stablize the construction process of spoil disposal field, it is characterized in that, that described spud pile can be is wooden, a kind of in bamboo matter or the iron and steel material.
5. according to claim 3ly a kind ofly accelerate to dredge bottom-mud dewatering and solidify and to stablize the construction process of spoil disposal field, it is characterized in that, described vertical draining wall is made of support frame, filler and infiltration filtering material, and described support frame is a kind of in iron net, bamboo braid or the wooden bracing frame; Described filler is a kind of in seepage brick, gravel or the porous building brick; Described filtering material can be with a kind of in the nonwoven of infiltration geotextiles or infiltration.
6. according to claim 1ly a kind ofly accelerate to dredge bottom-mud dewatering and solidify and to stablize the construction process of spoil disposal field, it is characterized in that, described drainage collection pipe diameter is 100～250mm, offer the water seepage hole that diameter is 4～8mm on the pipe, laying the gradient is 0.5%, the slope aspect delivery port, the tubing of drainage collection pipe is pvc pipe, pipe is wrapped with the infiltration geotextiles or spins cloth without infiltration, is placed in the gutter, fills gravel all around.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102288626A CN102926375A (en) | 2011-08-10 | 2011-08-10 | Sludge discharge field constructing method for speeding up dehydration, solidification and stabilization of dredged sediment |
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| CN2011102288626A CN102926375A (en) | 2011-08-10 | 2011-08-10 | Sludge discharge field constructing method for speeding up dehydration, solidification and stabilization of dredged sediment |
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Cited By (3)
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| CN104110024A (en) * | 2013-04-18 | 2014-10-22 | 中交上海航道勘察设计研究院有限公司 | Drainage consolidation method for reinforcement treatment of hydraulic filling soft clay |
| CN109354313A (en) * | 2018-11-15 | 2019-02-19 | 泉州师范学院 | Combine the method for building near-nature forest complexity waterfront zoology nearby using mud/waste residue |
| CN112609719A (en) * | 2021-01-04 | 2021-04-06 | 上海勘测设计研究院有限公司 | Sludge dewatering and curing system and construction method thereof |
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| CN109354313A (en) * | 2018-11-15 | 2019-02-19 | 泉州师范学院 | Combine the method for building near-nature forest complexity waterfront zoology nearby using mud/waste residue |
| CN112609719A (en) * | 2021-01-04 | 2021-04-06 | 上海勘测设计研究院有限公司 | Sludge dewatering and curing system and construction method thereof |
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Application publication date: 20130213 |