CN211948275U - Dredged sediment supernatant rapid filtration's permeable dam structure - Google Patents
Dredged sediment supernatant rapid filtration's permeable dam structure Download PDFInfo
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- CN211948275U CN211948275U CN202020235699.0U CN202020235699U CN211948275U CN 211948275 U CN211948275 U CN 211948275U CN 202020235699 U CN202020235699 U CN 202020235699U CN 211948275 U CN211948275 U CN 211948275U
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Abstract
A dredged sediment supernatant rapid filtration permeable dam structure comprises: the bottom of the upper permeable dam is connected with the dredging mud storage yard cofferdam through the straw covered loam layer, and the non-woven geotextile is connected with the outer surfaces of the upper permeable dam and the dredging mud storage yard cofferdam. Wherein, upper portion permeable dam includes: a first natural scintillating stone filling area, a second natural scintillating stone filling area, an artificial scintillating stone filling area and a backwash tube. Compared with the prior art, the utility model, through cancel original sluice or drainage pipe drainage on current dredging mud storage yard cofferdam, add upper portion permeable dam, realize carrying out the rapid filtration to dredging mud supernatant, the centre sets up multistage filler structure, can reduce the concentration of supernatant suspended solid fast, satisfies original water requirement again, improves mud drainage drippage efficiency.
Description
Technical Field
The utility model relates to a river lake dredging engineering field, concretely relates to dredge quick filterable dam structure of bed mud supernatant.
Background
According to the investigation and research on the lake substrate in China during the 'eleven-five' period, lake substrate sludge pollution of different degrees exists in large rivers such as Yangtze river basin, yellow river basin, Taihu lake, Dian lake and nested lake in China, and the lake substrate sludge pollution becomes an important factor influencing the lake water quality and water ecology. The environmental protection desilting is the main measure for treating the bottom mud of the polluted rivers and lakes at home and abroad at present, and aims to remove the polluted bottom mud in the water bodies of rivers and lakes and reservoirs and improve the water ecological environment.
At present, cutter suction type sludge hydraulic filling equipment is mostly adopted for river and lake environment-friendly dredging in China, due to the limitation of the equipment and the conveying process, the concentration of hydraulic filling sludge is lower and is between 10% and 15%, and the volume of slurry can be increased to 6-8 times of that of original slurry. Meanwhile, most of the polluted slurry of the environmental-friendly dredging belongs to organic soil and mucky soil, the natural separation time of the slurry and the water is long, the separation effect is poor, the area of a storage yard is large, the land is occupied for a long time, and the implementation of the environmental-friendly dredging project is restricted to a great extent.
In order to solve the problem, the flocculant is generally adopted to carry out the auxiliary dehydration of the dredged mud in China, so that the concentration of suspended matters in the supernatant of the mud can be reduced, and the mud-water separation time can be shortened. However, the concentration of suspended matters in the separated slurry supernatant is still generally between 150 and 300mg/L, and great pressure is brought to the treatment process and cost brought by subsequent residual water treatment. And if the concentration of the suspended matters in the supernatant needs to be further reduced, the type and the dosage of the flocculating agent need to be increased by times, so that the cost of mud-water separation is greatly increased.
Therefore, a technology for quickly removing supernatant fluid suspended matters and pollutant concentrations of dredging mud at low cost is found, and the technology has very important significance for reducing the subsequent residual water treatment pressure and reducing the overall cost of environment-friendly dredging sediment treatment.
In order to solve the above problems, we have made a series of improvements.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a dredged sediment supernatant rapid filtration's permeable dam structure to overcome the above-mentioned shortcoming and not enough that prior art exists.
A dredged sediment supernatant rapid filtration permeable dam structure comprises: the bottom of the upper permeable dam is connected with the dredging mud storage yard cofferdam through the straw covered loam layer, and the non-woven geotextile is connected with the upper permeable dam and the outer surface of the dredging mud storage yard cofferdam;
wherein, upper portion permeable dam includes: the scintillation detector comprises a first natural scintillation stone filling area, a second natural scintillation stone filling area, an artificial scintillation stone filling area and a backwash pipe, wherein the first natural scintillation stone filling area is connected with one side of the artificial scintillation stone filling area, the second natural scintillation stone filling area is connected with the other side of the artificial scintillation stone filling area, the backwash pipe is connected with the first natural scintillation stone filling area, the second natural scintillation stone filling area and the inside of the artificial scintillation stone filling area, the particle size of scintillation stones in the first natural scintillation stone filling area is 10-15 cm, the particle size of scintillation stones in the second natural scintillation stone filling area is 5-8 cm, the particle size of scintillation stones in the artificial scintillation stone filling area is 5-8 cm, the nominal diameter of the backwash pipe is 150mm, the diameter of an opening in the pipe wall of the backwash pipe is 10mm, and the top width of the upper water permeable dam is larger than 2 m.
Further, the dredging mud stockyard cofferdam comprises: the dredging device comprises a dredging bottom mud storage yard, a cofferdam permeable dam, a dredging residual water treatment pool, a clay layer and backfilling excavated soil, wherein the dredging bottom mud storage yard is connected with one side of the cofferdam permeable dam, the dredging residual water treatment pool is connected with the other side of the cofferdam permeable dam, the clay layer is connected with the inner side of a non-woven geotextile slope wall, and the backfilling excavated soil is arranged at the middle upper part of the cofferdam permeable dam.
Furthermore, the section of the upper permeable dam is of a trapezoidal structure, and the bottom of the upper permeable dam is provided with 0.2% -0.3% of bottom gradient along the water flow direction.
Further, the volume of the first natural scintillation stone filling area and the second natural scintillation stone filling area is 25% -30% of the volume of the upper permeable dam, and the volume of the artificial scintillation stone filling area is 40% -50% of the volume of the upper permeable dam.
The utility model has the advantages that:
compared with the prior art, the utility model, through cancel original sluice or drainage pipe drainage on current dredging mud storage yard cofferdam, add upper portion permeable dam, realize carrying out the rapid filtration to dredging mud supernatant, the centre sets up multistage filler structure, can reduce the concentration of supernatant suspended solid fast, satisfies original water requirement again.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
Reference numerals:
an upper permeable dam 100, a first natural scintillating stone fill region 110, a second natural scintillating stone fill region 120, an artificial scintillating stone fill region 130, and a backwash tube 140.
The soil-working layer comprises a straw-wrapped loam layer 200, a dredging mud storage yard cofferdam 300, a dredging bottom mud storage yard 310, a cofferdam permeable dam 320, a dredging residual water treatment pond 330, a clay layer 340, backfill excavated soil 350 and non-woven geotextile 400.
Detailed Description
The present invention will be further described with reference to the following examples. It should be understood that the following examples are illustrative only and are not intended to limit the scope of the present invention.
Example 1
Fig. 1 is a schematic structural diagram of the present invention.
As shown in fig. 1, a permeable dam structure for rapid filtration of supernatant of dredged sediment comprises: the bottom of the upper permeable dam 100 is connected with the dredging mud storage yard cofferdam 300 through the straw-covered loam layer 200, and the non-woven geotextile 400 is connected with the outer surfaces of the upper permeable dam 100 and the dredging mud storage yard cofferdam 300;
wherein the upper permeable dam 100 includes: the scintillation detector comprises a first natural scintillation stone filling area 110, a second natural scintillation stone filling area 120, an artificial scintillation stone filling area 130 and a backwash pipe 140, wherein the first natural scintillation stone filling area 110 is connected with one side of the artificial scintillation stone filling area 130, the second natural scintillation stone filling area 120 is connected with the other side of the artificial scintillation stone filling area 130, the backwash pipe 140 is connected with the first natural scintillation stone filling area 110, the second natural scintillation stone filling area 120 and the interior of the artificial scintillation stone filling area 130, the particle size of the scintillation stone of the first natural scintillation stone filling area 110 is 10-15 cm, the particle size of the scintillation stone of the second natural scintillation stone filling area 120 is 5-8 cm, the particle size of the scintillation stone of the artificial scintillation stone filling area 130 is 5-8 cm, the nominal diameter of the backwash pipe 140 is 150mm, the diameter of an opening of the backwash pipe 140 is 10mm, and the width of the top of the upper portion dam 100 is larger than 2 m.
Dredging mud yard cofferdam 300 comprises: the dredging bottom mud storage yard 310 is connected with one side of the cofferdam permeable dam 320, the dredging residual water treatment pond 330 is connected with the other side of the cofferdam permeable dam 320, the clay layer 340 is connected with the inner side of the slope wall of the non-woven geotextile 400, and the backfilling excavated soil 350 is arranged at the upper part of the middle of the cofferdam permeable dam 320.
The section of the upper permeable dam 100 is a trapezoidal structure, and the bottom of the upper permeable dam 100 is provided with 0.2% -0.3% of bottom gradient along the water flow direction.
The volume of the first natural scintillating stone filling region 110 and the second natural scintillating stone filling region 120 is 25-30% of the volume of the upper permeable dam 100, and the volume of the artificial scintillating stone filling region 130 is 40-50% of the volume of the upper permeable dam 100.
The working principle of the utility model is that the permeable dam structure of the upper and lower parts is adopted, and the straw wrapped loam layer 200 is arranged between the upper and lower parts. The upper part is the permeable dam 100 of upper portion, and upper portion permeable dam 100 is inside to set up the filler filtration, and the outside sets up one deck bagged rubble and non-woven geotechnological cloth 400. The lower part is a traditional dredging mud yard cofferdam 300 which belongs to a watertight structure, the middle of the cofferdam is backfilled excavation soil 350, the inner side and the outer side of a bank slope are an clay layer 340 and a non-woven geotextile 400, and the parameter is 200g/m2 impermeable layer. The width of the top of the upper permeable dam 100 is generally larger than 2m, the permeable height is about 1m, the section of the upper permeable dam 100 is of a trapezoidal structure, and the bottom of the upper permeable dam 100 is provided with 0.25% of bottom gradient along the water flow direction. The internal filtering and filling matrix mainly comprises three parts along the water flow direction: a first natural gravel packed region 110 of 12cm particle size, the volume of which is 25% of the volume of the water permeable layer; the artificial gravel packing area 130 with the particle size of 6cm is 50% of the volume of the water permeable layer, and the artificial gravel needs to be cleaned; a second natural gravel packed region 120 of 6cm particle size, 25% by volume of the water permeable layer. Set up dn150mm backwash pipe 140 in the gravel permeable bed, solve permeable bed mud suspended solid and block up the problem, realize permeable bed sustainable operation, the different particle diameter gravel in-process of dredging mud supernatant is purified step by step through the effect of quick contact, deposit, absorption surface biomembrane, and the object of getting rid of is mainly suspended solid and the pollutant of attached to on the suspended solid. The utility model discloses a cancel original sluice or drainage pipe drainage on current dredging mud store yard cofferdam, add the upper portion dam that permeates water, realize carrying out the rapid filtration to dredging mud supernatant, the centre sets up multistage filler structure, can reduce the concentration of supernatant suspended solid fast, satisfies original water requirement again.
The above description has been made of the embodiments of the present invention, but the present invention is not limited thereto, and various changes may be made without departing from the spirit of the present invention.
Claims (4)
1. The utility model provides a dredged sediment supernatant rapid filtration's permeable dam structure which characterized in that includes: the bottom of the upper permeable dam (100) is connected with the dredging mud storage yard cofferdam (300) through the straw covered loam layer (200), and the non-woven geotextile (400) is connected with the outer surfaces of the upper permeable dam (100) and the dredging mud storage yard cofferdam (300);
wherein the upper permeable dam (100) comprises: a first natural scintillation stone filling area (110), a second natural scintillation stone filling area (120), an artificial scintillation stone filling area (130), and a backwash tube (140), wherein the first natural scintillation stone filling area (110) is connected with one side of the artificial scintillation stone filling area (130), the second natural scintillation stone filling area (120) is connected with the other side of the artificial scintillation stone filling area (130), the backwash tube (140) is connected with the first natural scintillation stone filling area (110), the second natural scintillation stone filling area (120), and the interior of the artificial scintillation stone filling area (130), the scintillation stone grain size of the first natural scintillation stone filling area (110) is 10-15 cm, the scintillation stone grain size of the second natural scintillation stone filling area (120) is 5-8 cm, the artificial scintillation stone filling area (130) is 5-8 cm, and the nominal diameter of the backwash tube (140) is 150mm, the diameter of the opening of the pipe wall of the backwashing pipe (140) is 10mm, and the width of the top of the upper permeable dam (100) is larger than 2 m.
2. The permeable dam structure for rapid filtration of dredged sediment supernatant according to claim 1, characterized in that: the dredging mud yard cofferdam (300) comprises: the dredging bottom mud storage yard (310), the cofferdam permeable dam (320), the dredging residual water treatment pool (330), the clay layer (340) and the backfill excavated soil (350), wherein the dredging bottom mud storage yard (310) is connected with one side of the cofferdam permeable dam (320), the dredging residual water treatment pool (330) is connected with the other side of the cofferdam permeable dam (320), the clay layer (340) is connected with the inner side of the slope wall of the non-woven geotextile (400), and the backfill excavated soil (350) is arranged at the middle upper part of the cofferdam permeable dam (320).
3. The permeable dam structure for rapid filtration of dredged sediment supernatant according to claim 1, characterized in that: the section of the upper permeable dam (100) is of a trapezoidal structure, and the bottom of the upper permeable dam (100) is provided with 0.2% -0.3% of bottom gradient along the water flow direction.
4. The permeable dam structure for rapid filtration of dredged sediment supernatant according to claim 1, characterized in that: the volume of the first natural scintillation stone filling area (110) and the second natural scintillation stone filling area (120) is 25% -30% of the volume of the upper water permeable dam (100), and the volume of the artificial scintillation stone filling area (130) is 40% -50% of the volume of the upper water permeable dam (100).
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| CN202020235699.0U CN211948275U (en) | 2020-02-28 | 2020-02-28 | Dredged sediment supernatant rapid filtration's permeable dam structure |
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| CN202020235699.0U CN211948275U (en) | 2020-02-28 | 2020-02-28 | Dredged sediment supernatant rapid filtration's permeable dam structure |
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