CN103774608A - Coupling technique of city watercourse dredging and sequence reestablishment from shoal to deep pool - Google Patents
Coupling technique of city watercourse dredging and sequence reestablishment from shoal to deep pool Download PDFInfo
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- CN103774608A CN103774608A CN201410061431.9A CN201410061431A CN103774608A CN 103774608 A CN103774608 A CN 103774608A CN 201410061431 A CN201410061431 A CN 201410061431A CN 103774608 A CN103774608 A CN 103774608A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A20/40—Protecting water resources
- Y02A20/402—River restoration
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Abstract
The invention relates to a coupling technique of city watercourse dredging and sequence reestablishment from a shoal to a deep pool. The coupling technique of the city watercourse dredging and the sequence reestablishment from the shoal to the deep pool is characterized in that a sequence from the shoal to the deep pool of a river is reestablished on a city watercourse crook portion where a river bank is upright and sclerotic by combining the watercourse dredging with a bottom mud solidification technique. According to the coupling technique of the city watercourse dredging and the sequence reestablishment from the shoal to the deep pool, the shoal can provide appropriate growing environment for submerged plants and aquatic animals, and the submerged plants not only can purify water and inhibit growth of algae, but also can provide good habitat environment for the aquatic animals, and thereby further improves self cleaning capacity of a watercourse; the sequence from the shoal to the deep pool can strengthen hydrodynamic force of the watercourse, improve dissolution oxygen content in a water body, mitigate anoxic status of lower layers of the city watercourse, and improve biological activity of bottom mud, and thereby improves self cleaning capacity of the water body.
Description
Technical field
The invention belongs to field of environment engineering, relate to a kind of city river ecological reestablishment, especially relate to a kind of city river desilting and shoal-pool sequence and rebuild GC-MS.
Background technology
Along with the development of urbanization, for meeting the demand of economic development, city river form is changed greatly, has the upright hardening of embankment, river course linearization(-sation), the phenomenons such as river cross-section unification.Add that city river hydrodynamic condition is single, for a long time in high water level, make aquatile lose the environment of depending on for existence, cause river course bio-diversity to reduce, self-purification capacity weakens.The deterioration of city river water quality and view has had a strong impact on periphery resident's life, needs badly effectively and administers.
The main method that city river is administered comprises: cut the physical methods such as dirt, desilting, water transfer, artificial oxygenation; The chemical methodes such as flocculation, absorption; The biological method such as composite bacteria agent, biomembrane; Biological floating bed, the ecological restoring methods such as ecological revetment.In said method, the bed mud producing for desilting does not also have good solution at present, is generally easy to produce secondary pollution; Biological floating bed grade generally can only be for emergent aquactic plant provides suitable growing environment, and for not providing suitable growing environment maintaining the submerged plant playing a crucial role in stable state of clear water.
Due to the restriction of technology and economic aspect, Chinese city river course form reparation at present is also just limited to the reparation of Riparian Zone, and considers flood control safety, and Riparian Zone reparation is being also utilized of few scope.Shoal-pool sequence is the primary structure of habitat, river, and they provide diversified environment for biology, and the reconstruction of shoal-pool sequence should be the important content that river ecological is repaired, but is not also related at present.The deficiency of fluvial morphology reparation aspect is had a greatly reduced quality the effect of city river restoration of the ecosystem.
Summary of the invention
In order to overcome the deficiencies in the prior art, how to rebuild shoal-pool sequence for the river course that uprightly harden in riverbank, section is single, and this difficult problem of Essential Environment of repairing biological growth, in conjunction with channel cleanout, the invention provides a kind of city river desilting and shoal-pool sequence and rebuild GC-MS.
For achieving the above object, the technical solution used in the present invention is:
A kind of city river desilting and shoal-pool sequence are rebuild GC-MS, comprise the steps:
(1) in the city river knee of embankment hardening, embankment protrudes a side to river course, relies on embankment, irises out a region with timber and enclosure, as structure region, shoal;
(2) in the position apart from downstream, structure region, shoal certain distance, selected pool builds region, utilizes the method for suction that the bed mud in this region is delivered into mixer;
(3) bed mud that suction comes up and certain proportion curing compound and sand grains mix in mixer, then insert structure region, shoal;
After (4) 3～5 days, remove enclosure, on the shoal building, plant planting submerged plant.
Preferably, in step (1), the ratio that the Breadth Maximum in structure region, described shoal is river width is 0.2～0.5:1.0, and the gradient is 1～2:1.
Preferably, in step (2), described pool builds region division in the position apart from 3～8 times of river widths in downstream, structure region, shoal.Utilize suction machine, dredging tube, dredging tube that the bed mud in pool region is sent into mixer, under suction machine effect, pool builds the bed mud in region by the dredging tube being connected with suction machine entrance, and exports with suction machine the dredging tube being connected and send into mixer.
Preferably, described mixer is provided with a defeated mud groove near embankment place, and defeated mud groove upper end is connected with mixer discharging opening, and structure region, shoal is stretched in lower end.Defeated mud groove can adopt metal trough.
Preferably, in step (3), described sand grains diameter is 0.5～2mm, and the weight ratio of bed mud, curing compound, sand grains is 100:5～10:10～15.Measure the density of bed mud, calculate the weight of bed mud according to the volume of mixer, according to the weight ratio of bed mud, curing compound, sand grains, manually add curing compound and sand grains, stir, the bed mud after stirring is inserted structure region, shoal by the defeated mud groove (metal trough) then arranging by mixer discharging opening.
Preferably, described pool structure region area is 2～5 times that shoal builds region area.
Preferably, lay the suitably layer of gravel of height on described shoal, described layer of gravel height is 10～20cm.Make the growth of its submerged plant preferably.
Preferably, when the ordinary water level of described shoal apart from the distance 30～50cm of the water surface.
Preferably, structure region, described shoal be shaped as leaf.
Preferably, on described shoal, also plant and be implanted with emergent aquactic plant, described submerged plant planting density is 20～30 clumps/m
2, emergent aquactic plant planting density is 20～30 strains/m
2.Carry out in the early stage the unrestrained measure that disappears, guarantee the survival of plant.
For the single city river of section, the present invention proposes to utilize bed mud that desilting produces to build the scheme of shoal-pool sequence.The curing compound using in the present invention is selected commercially available composite curing agent, is made up of cement, flyash and lime, and the ratio of interpolation determines by cure test, and curing compound can make the intensity of bed mud reach 0.3MPa.
By the present invention, the city river knee of upright sclerosis on riverbank, in conjunction with shoal-pool sequence in channel cleanout and bed mud curing technology reconstruction river, shoal can provide suitable growing environment for submerged plant and aquatic animal, submerged plant can not only purify water, suppress the growth of algae, also can be for other aquatic animals provide good habitat, thus the self-purification capacity in river course further improved; Shoal-pool sequence can strengthen river course hydrodynamic force, improves Dissolved Oxygen in Water content, alleviates the state of city river low layer anoxic, improves the biologically active of bed mud, thereby improves the self-purification capacity of water body.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is that shoal of the present invention builds profile;
1-shoal, 2-pool, 3-dredging tube, 4-suction machine, 5-dredging tube, 6-mixer, the defeated mud groove of 7-, 8-submerged plant, 9-emergent aquactic plant.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but protection scope of the present invention is not limited to this.
Embodiment 1
Choose certain city river of the upright sclerosis of embankment, river width 12～15m, it is 0m that ordinary water level 1.5m(sets bed level of the river), transparency 50～60cm, the thick 15～30cm of bed mud.
With reference to Fig. 1, Fig. 2, a kind of city river desilting and shoal-pool sequence are rebuild GC-MS, comprise the steps:
(1) in knee, river course, embankment protrudes the selected shoal 1 of a side and builds region to river course, rely on riverbank, it is 5m that design shoal 1 builds region the widest part, elevation 1.1m,, squeezes in bed mud with the gradient of 2:1 according to the shape of leaf curve with the timber of long 2.5m, timber spacing 1m, puts up shoal external frame; Do enclosure with geotextiles, enclosure bottom falling weight, puts into framework inside, relies on buoyancy enclosure can be attached on timber, and top is fixed on timber top;
(2) apart from 50～60 m places, downstream, structure region, shoal, selected pool 2 builds region, pool area is 3～4 times of shoal area, pool 2 builds the bed mud in region by the dredging tube 3 being connected with suction machine 4 entrances, through suction machine 4, send into mixer 6 by exporting with suction machine 4 dredging tube 5 being connected;
(3) measure the density of bed mud, calculate the weight of bed mud according to the volume of mixer, according to bed mud: the ratio of curing compound: sand grains=100:6～7:10 is manually added curing compound and sand grains, mixes in mixer 6; Described mixer is provided with a defeated mud groove 7(metal trough near embankment place), defeated mud groove (metal trough) upper end is connected with mixer discharging opening, and structure region, shoal is stretched in lower end, and the metal trough 7 that the bed mud mixing is arranged by discharging opening is inserted shoal 1 and is built region;
After (4) 3 days, remove enclosure, at shoal 1 top plantation hornwort and two kinds of submerged plants 8 of leaf of bamboo bog pondweed, 20～30 clumps/m of planting density
2.
Choose certain city river of the upright sclerosis of embankment, river width 9～12m, it is 0m that ordinary water level 1.2m(sets bed level of the river), transparency 30～40cm, the thick 20～40cm of bed mud.
With reference to Fig. 1, Fig. 2, a kind of city river desilting and shoal-pool sequence are rebuild GC-MS, comprise the steps:
(1) in knee, river course, embankment protrudes the selected shoal 1 of a side and builds region to river course, rely on riverbank, and design shoal the widest part is 4m, top elevation 0.9m., squeeze in bed mud with the gradient of 1:1 according to the shape of leaf curve with the timber of long 2m, timber spacing 1m, puts up shoal external frame; Do enclosure with geotextiles, enclosure bottom falling weight, puts into framework inside, relies on buoyancy enclosure can be attached on timber, and top is fixed on timber top;
(2) apart from 45～60 m places, downstream, shoal, selected pool 2 builds region, pool area is 2～3 times of shoal area, pool 2 builds the bed mud in region by the dredging tube 3 being connected with suction machine 4 entrances, sends into mixer 6 through suction machine 4 by exporting with suction machine 4 dredging tube 5 being connected;
(3) measure the density of bed mud, calculate the weight of bed mud according to the volume of mixer, according to bed mud: the ratio of curing compound: sand grains=100:8～10:15 is manually added curing compound and sand grains, mixes in mixer 6; Described mixer is provided with a defeated mud groove 7(metal trough near embankment place), defeated mud groove (metal trough) upper end is connected with mixer discharging opening, and structure region, shoal is stretched in lower end, and the metal trough 7 that the bed mud mixing is arranged by discharging opening is inserted shoal 1 and is built region;
After (4) 4 days, remove enclosure, lay one deck layer of gravel on shoal 1, layer of gravel height is 10cm, and top, shoal is near scope plantation wild rice and two kinds of emergent aquactic plants 9 of gold thread grass-leaved sweetflag of embankment one side 0.5～1 m, planting density 20～25 strains/m
2; Other ecological region planting hornworts of top, shoal and two kinds of submerged plants 8 of eel grass, 25～30 clumps/m of planting density
2.
Choose certain city river of the upright sclerosis of embankment, river width 8～11m, it is 0m that ordinary water level 1.3m(sets bed level of the river), transparency 40～60cm, the thick 10～25cm of bed mud.
With reference to Fig. 1, Fig. 2, a kind of city river desilting and shoal-pool sequence are rebuild GC-MS, comprise the steps:
(1) in knee, river course, embankment protrudes the selected shoal 1 of a side and builds region to river course, rely on riverbank, and design top, shoal the widest part is 3m, top elevation 0.8m; , squeeze in bed mud with the gradient of 2:1 according to the shape of leaf curve with the timber of long 2m, timber spacing 1m, puts up shoal external frame; Do enclosure with geotextiles, enclosure bottom falling weight, puts into framework inside, relies on buoyancy enclosure can be attached on timber, and top is fixed on timber top;
(2) apart from 40～60 m places, downstream, shoal, selected pool 2 builds region, pool area is 4～5 times of shoal area, pool 2 builds the bed mud in region by the dredging tube 3 being connected with suction machine 4 entrances, sends into mixer 6 through suction machine 4 by exporting with suction machine 4 dredging tube 5 being connected;
(3) measure the density of bed mud, calculate the weight of bed mud according to the volume of mixer, according to bed mud: the ratio of curing compound: sand grains=100:5:10 is manually added curing compound and sand grains, mixes in mixer 6; The metal trough 7 that the bed mud mixing is arranged by discharging opening is inserted shoal 1 and is built region;
After (4) 5 days, remove enclosure, 1 top, shoal is near scope plantation wild rice and two kinds of emergent aquactic plants 9 of gold thread grass-leaved sweetflag of embankment one side 0.5～1 m, planting density 25～30 strains/m
2; Other ecological region planting hornworts of top, shoal and two kinds of submerged plants 8 of eel grass, 20～25 clumps/m of planting density
2.
Claims (10)
1. city river desilting and shoal-pool sequence are rebuild a GC-MS, it is characterized in that comprising the steps:
(1) in the city river knee of embankment hardening, embankment protrudes a side to river course, relies on embankment, irises out a region with timber and enclosure, as structure region, shoal;
(2) in the position apart from downstream, structure region, shoal certain distance, selected pool builds region, utilizes the method for suction that the bed mud in this region is delivered into mixer;
(3) bed mud that suction comes up and certain proportion curing compound and sand grains mix in mixer, then insert structure region, shoal;
After (4) 3～5 days, remove enclosure, on the shoal building, plant planting submerged plant.
2. city river desilting according to claim 1 and shoal-pool sequence are rebuild GC-MS, it is characterized in that: in step (1), the Breadth Maximum in structure region, described shoal and the ratio of river width are 0.2～0.5:1.0, and the gradient is 1～2:1.
3. city river desilting according to claim 1 and shoal-pool sequence are rebuild GC-MS, it is characterized in that: in step (2), described pool builds region division in the position apart from 3～8 times of river widths in downstream, structure region, shoal.
4. city river desilting according to claim 3 and shoal-pool sequence are rebuild GC-MS, it is characterized in that: described mixer is provided with a defeated mud groove near embankment place, and defeated mud groove upper end is connected with mixer discharging opening, and structure region, shoal is stretched in lower end.
5. city river desilting according to claim 1 and shoal-pool sequence are rebuild GC-MS, it is characterized in that: in step (3), described sand grains diameter is 0.5～2mm, and the weight ratio of bed mud, curing compound, sand grains is 100:5～10:10～15.
6. city river desilting according to claim 1 and shoal-pool sequence are rebuild GC-MS, it is characterized in that: it is 2～5 times that shoal builds region area that described pool builds region area.
7. city river desilting according to claim 1 and shoal-pool sequence are rebuild GC-MS, it is characterized in that: on described shoal, lay the suitably layer of gravel of height, described layer of gravel height is 10～20cm.
8. city river desilting according to claim 1 and shoal-pool sequence are rebuild GC-MS, it is characterized in that: when the ordinary water level of described shoal, be 30～50cm apart from the distance of the water surface.
9. city river desilting according to claim 1 and shoal-pool sequence are rebuild GC-MS, it is characterized in that: being shaped as of structure region, described shoal is leaf.
10. city river desilting according to claim 1 and shoal-pool sequence are rebuild GC-MS, it is characterized in that: on described shoal, also plant and be implanted with emergent aquactic plant, described submerged plant planting density is 20～30 clumps/m
2, emergent aquactic plant planting density is 20～30 strains/m
2.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105712596A (en) * | 2016-02-03 | 2016-06-29 | 深圳市铁汉生态环境股份有限公司 | In-situ remediation method for mining area watershed heavy metal pollution bottom sludge |
| CN108715486A (en) * | 2018-06-11 | 2018-10-30 | 华川技术有限公司 | A kind of method of basin pool shoal molecular fluid restoration of the ecosystem |
| CN108862599A (en) * | 2018-06-19 | 2018-11-23 | 江苏东珠景观股份有限公司 | A kind of wetland purification dynamic regulation system |
| CN114960534A (en) * | 2022-04-01 | 2022-08-30 | 水利部交通运输部国家能源局南京水利科学研究院 | Natural form structure and construction method for deep pool and shoal of straight river channel |
| CN115075184A (en) * | 2022-07-08 | 2022-09-20 | 江苏百绿园林集团有限公司 | Urban inland river curved river channel anti-erosion revetment structure layout and construction method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105712596A (en) * | 2016-02-03 | 2016-06-29 | 深圳市铁汉生态环境股份有限公司 | In-situ remediation method for mining area watershed heavy metal pollution bottom sludge |
| CN105712596B (en) * | 2016-02-03 | 2019-06-11 | 深圳市铁汉生态环境股份有限公司 | A kind of in-situ remediation method of mining area basin heavy metal polluted bed mud |
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| CN108862599A (en) * | 2018-06-19 | 2018-11-23 | 江苏东珠景观股份有限公司 | A kind of wetland purification dynamic regulation system |
| CN114960534A (en) * | 2022-04-01 | 2022-08-30 | 水利部交通运输部国家能源局南京水利科学研究院 | Natural form structure and construction method for deep pool and shoal of straight river channel |
| CN115075184A (en) * | 2022-07-08 | 2022-09-20 | 江苏百绿园林集团有限公司 | Urban inland river curved river channel anti-erosion revetment structure layout and construction method |
| CN115075184B (en) * | 2022-07-08 | 2024-05-17 | 江苏百绿园林集团有限公司 | Urban inland river curved river erosion protection shore structure layout and construction method |
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