CN103397646B - Technique for fast filling constructed wetland in shore area - Google Patents
Technique for fast filling constructed wetland in shore area Download PDFInfo
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- CN103397646B CN103397646B CN201310359181.2A CN201310359181A CN103397646B CN 103397646 B CN103397646 B CN 103397646B CN 201310359181 A CN201310359181 A CN 201310359181A CN 103397646 B CN103397646 B CN 103397646B
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- 238000000034 method Methods 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000000926 separation method Methods 0.000 claims abstract description 13
- 239000002689 soil Substances 0.000 claims abstract description 6
- 239000004575 stone Substances 0.000 claims description 13
- 239000004746 geotextile Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000035699 permeability Effects 0.000 abstract description 2
- 239000004744 fabric Substances 0.000 abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000007596 consolidation process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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Abstract
The invention discloses a technique for fast filling a constructed wetland in a shore area. A jetty and a separation cofferdam are adopted to divide the wetland into a plurality of hydraulic reclamation areas as required; each hydraulic reclamation area is constructed independently, so that the construction production efficiency is improved and the construction period is shortened. A bucket-wheel type dredger instead of a common cutter suction dredger is adopted to perform hydraulic reclamation construction, the discharged soil is small blocks, has the characteristic of partial saturation, is relatively shorter in solidification time, and can meet the requirement of planting plants in the wetland in short time. The bucket-wheel type dredger is utilized to borrow earth from a lake region, and the borrow pit of the separation cofferdam is filled and leveled up in an equal quantity replacement manner by adopting the hydraulic reclamation manner, so that the production efficiency is effectively improved, the project cost is reduced, and the cost is decreased. A high-strength geotechnical cloth is arranged on the inner side of the jetty, so that the hydraulic reclamation earthwork in the wetland is prevented from entering the lake region through the holes of the jetty, and the pollution to the lake water is reduced; the water permeability of the high-strength geotechnical cloth enables the water bodies of the wetland and the lake to communicate, and the influence on the wetland environment is avoided.
Description
Technical field
The invention belongs to improvement of the ecological environment and environmental technology field, relate to civil engineering, be specifically related to a kind of process of filling artificial swamp in territory, Lake District fast.
Background technology
Lake, shore wetland washes away play an important role to reparation lake ecological environment, purification water body in lake, reduction stormy waves.But along with social development, in the discharge of sewage, the toppling over of rubbish, region, point-source pollution and pollution of area source etc. make lake, shore wetlands ecosystems be seriously damaged, and cannot play the function of regulating water quality, protecting ecology.In conjunction with bottom mud in lake desilting, fill lake, shore artificial swamp by fetching earth in lake, recovering water plant and other biology, is a kind of mode wherein.
The method of filling artificial swamp that fetches earth from lake at present mainly contains two kinds: a kind of is hydraulic reclamation method, this method adopts cutter suction dredger construction, suction water pipe front end is utilized to rotate reamer device around suction water pipe installing, river sediment is carried out cutting and stirring, again through silt material that dredging tube will hoist, by powerful pumping forces, be transported to hydraulic reclamation region.This method is dredged, transport the course of work such as mud, dump can one-time continuous complete, and efficiency is high, cost is low, but particle after hydraulic reclamation is very thin, is difficult to consolidation and forms the landscape water bodies such as sub-lake, water channel fast; Another kind of is barging method, this method by the hydraulic grab arranged aboard ship take lakebed earth material be directly discharged near hopper on, and fill region to wetland, after filling region by hopper muck haulage material, soil is unloaded from muck haulage hopper again by hydraulic hoe, finally flattened by wetland excavator, after this method excavation, the earthwork becomes block, fills rear soil solidifying rapid, can directly be used to beach face after construction terminates, be easy to be shaped, but efficiency of construction is low, cost is high.
Summary of the invention
The object of the invention is to the deficiency overcoming the existence of existing process, to meet the requirement carrying out planting on wetland, and provide a kind of process of filling artificial swamp in territory, Lake District fast.The concrete technical scheme of the present invention is as follows: a kind of process of filling artificial swamp in territory, Lake District fast, and be provided with more than one sub-lake, the water channel landscape water body of one or more in territory, described Lake District, the concrete operation step filling artificial swamp is as follows:
(1) hydraulic reclamation district is preset
The layout of zygote lake, water channel, the outer rim along territory, described Lake District arranges mole, in the inside in territory, described Lake District, arranges respectively separate cofferdam at the periphery of Zi Hu, water channel; The setting in described mole and described separation cofferdam defines the separate hydraulic reclamation district of more than two pieces;
(2) mole is filled
The method adopting jackstone to fill fills mole;
(3) separation cofferdam is filled
Adopt the method in homogeneous soil cofferdam, fetch earth to fill in described hydraulic reclamation district and separate cofferdam;
(4) hydraulic reclamation earth material
Mud delivery pipeline is set, one end of mud delivery pipeline is connected with bucket-wheel suction dredger, the other end of mud delivery pipeline is extended to described hydraulic reclamation district; The earth dug out is delivered to described hydraulic reclamation district by described mud delivery pipeline;
(5) shaping is arranged
If the height in described separation cofferdam exceeds the height in described hydraulic reclamation district, even the part separated and cofferdam exceeds out, and carry out smooth to the surface in described hydraulic reclamation district, namely complete filling of artificial swamp.
Described step (4) concrete operations are: utilize described bucket-wheel suction dredger to excavate the lakebed within the scope of 800 ~ 1500m lake region beyond described mole.
Described step (4) concrete operations are: utilize the high-power centrifugal dredge pump that described bucket-wheel suction dredger assembles that the earth dug out is delivered to described hydraulic reclamation district by described mud delivery pipeline.
Described step (2) concrete operations are: utilize stone to refute and be transported near surface of filling by filling described trunk of breakwater building stones, power ship arranges hydraulic backhoe, utilizes this hydraulic backhoe described to refute middle crawl building stones from described stone and fill.
Described step (3) concrete operations are: on power ship, arrange hydraulic backhoe, utilize described hydraulic backhoe to fetch earth in described hydraulic reclamation district and fill.
The top width of described mole is 1.0 ~ 2.0m, and rise as at least higher than ordinary water level 0.5m, the gradient of interior side slope is 1:1.5, and the gradient of outer side slope is 1:1.5 ~ 1:2.
Described interior side slope adds the hardcore bed that thickness is 0.5m, described hardcore bed is laid one deck high-strength geotextile; The mass area ratio of described high-strength geotextile is not less than 400g/m
2, ultimate tensile strength is not less than 12.5kN/m.
Top width 3.0 ~ the 5.0m in described separation cofferdam, rises as at least higher than ordinary water level 0.5m, and side slope is shaped by depositional gradient under water.
Compared with prior art, the present invention has following Advantageous Effects:
(1), during wetland construction, often there is work holdup phenomenon in conventional monolithic construction method.This method adopts mole and separates cofferdam and whole wetland is divided into several hydraulic reclamation districts according to functional requirement, each hydraulic reclamation district independent construction, and each block responsibility is clearly demarcated, thus reaches raising construction production efficiency and the object of reduction of erection time;
(2) in hydraulic reclamation district of the present invention, the earthwork adopts bucket-wheel suction dredger to replace conventional cutter suction dredger to carry out dredge fill, its construction unit price and production efficiency suitable with cutter suction dredger.But compare with cutter suction dredger, the earth that bucket-wheel suction dredger is discharged has little bulk, and have not exclusively saturated feature, consolidation time is relatively short, can meet the requirement of planting plants on wetland at short notice;
(3) the present invention fetches earth nearby to fill and separates cofferdam in hydraulic reclamation district, utilizes bucket-wheel suction dredger to fetch earth from lake region and adopts hydraulic reclamation mode the displacement of borrow pit equivalent to be filled and led up, can effectively boost productivity and reduce construction costs, reduce cost;
(4), after adopting wetland of the present invention to fill, namely form the wetland landscapes such as sub-lake and water channel, do not need secondary to arrange, minimizing is done over again;
(5) the present invention arranges high-strength geotextile inside mole, can prevent the barged-in fill side in wetland from entering lake region by mole hole, to reduce and to avoid causing pollution in wide area to lake water; The water permeability of high-strength geotextile can make water body between wetland with lake water still be exchanged on the other hand, avoids impacting Wetland Environment.
Accompanying drawing explanation
Fig. 1 is that the present invention constructs layout schematic diagram.
Fig. 2 is levee construction schematic diagram of the present invention.
Fig. 3 is that the present invention separates cofferdam construction schematic diagram.
Fig. 4 is bucket-wheel suction dredger hydraulic reclamation schematic diagram of the present invention.
Number in the figure is described as follows:
Cofferdam separated by 1 hydraulic reclamation district, 2 mole, 3,4 sub-lakes, 5 water channels, 6 stones are refuted, 7 power ships, 8 hydraulic backhoes, 9 hardcore beds, 10 high-strength geotextiles, 11 bucket-wheel suction dredgers, 12 mud delivery pipelines, 13 bucket wheels.
Detailed description of the invention
Below in conjunction with accompanying drawing, describe the present invention in detail by the mode of embodiment.
Embodiment 1:
As shown in Figure 1, certain City's Waterfront lake artificial swamp trial section project land-based area water front is about 1800m, and mean breadth is about 500m, and wetland forward position, lake region peripheral lengths is about 2450m, Wetland Area about 80.23 ten thousand m
2, fill earth volume 94.1 ten thousand m
3, be inside provided with the landscape water bodies such as sub-lake 4, water channel 5.It is 4 months that wetland fills construction period, and can carry out plant measures thereon immediately after filling.Though conventional cutter suction dredger dredge fill can meet construction period, the wetland bearing capacity after filling can not meet requirement, and the water landscapes such as sub-lake, water channel are difficult to arrange shaping.It is low that grab dredger joins hopper constructure scheme efficiency of construction, be difficult to meet construction period, and cost is higher.
The invention provides a kind of process of filling artificial swamp in territory, Lake District fast, fill this section of artificial swamp, concrete operation step is as follows:
Step 1, presets hydraulic reclamation district
As required, i.e. the layout of zygote lake 4, water channel 5, the outer rim along artificial swamp arranges mole 2, in the inside of artificial swamp, the some separation cofferdam 3 of periphery along sub-lake 4, water channel 5, above-mentioned mole 2 and some separation cofferdam 3 define three pieces of separate hydraulic reclamation districts 1, see Fig. 1.Wherein, hydraulic reclamation district 1 refers in the scope of artificial swamp, removes the land-based area area after the landscape water bodies such as sub-lake 4, water channel 5, is the some land block be divided into by mole 2 and separation cofferdam 3.
Step 2, fills mole
Adopt the method that jackstone fills, by following optimum configurations mole 2: top width is 1.0 ~ 2.0m (for ease of mechanical execution, also as required top width can be set to more than 2.0m); Rise as at least higher than ordinary water level 0.5m, the gradient of interior side slope is 1:1.5, and the gradient of outer side slope is 1:2.Wherein, outer side slope corresponds to the side outside artificial swamp, and interior side slope corresponds to the side in artificial swamp.For preventing stormy waves scour from causing the earth material in hydraulic reclamation district 1 to run off, interior side slope adding the hardcore bed 9 that thickness is 0.5m, and lay one deck high-strength geotextile 10 on this hardcore bed 9; The mass area ratio of this high-strength geotextile 10 is not less than 400g/m
2, ultimate tensile strength is not less than 12.5kN/m.The levee body building stones of mole 2 are refuted 6 by the stone of load-carrying 200t and are transported near surface of filling, and power ship 7 arranges hydraulic backhoe 8, utilize this hydraulic backhoe 8 to refute 6 from stone and capture building stones and fill.High-strength geotextile 10 adopts manual type to roll paving from top, slope along slope, and natural overlap joint, lap width is not less than 20cm.See Fig. 2.
Step 3, fills and separates cofferdam
Adopt the method in homogeneous soil cofferdam, fetch earth to fill in hydraulic reclamation district 1 and separate cofferdam 3.Cofferdam 3 is separated: top width is that 3.0 ~ 5.0m (owing to filling in water by following optimum configurations, and earth material water content is comparatively large, for ensureing that weir body is stablized, cross section, cofferdam should not be too little), rise as at least higher than ordinary water level 0.5m, cofferdam embankment slope is shaped by depositional gradient under water.Power ship 7 arranges hydraulic backhoe 8, fetches earth in hydraulic reclamation district 1 and fill, and use hydraulic backhoe 8 arrangement to be shaped.See Fig. 3.
Step 4, hydraulic reclamation earth material
Mud delivery pipeline is set, one end of mud delivery pipeline is connected with bucket-wheel suction dredger, the other end of mud delivery pipeline is extended to hydraulic reclamation district; Utilize bucket-wheel suction dredger to excavate lakebed, the earth dug out is delivered to hydraulic reclamation district by mud delivery pipeline.Material selection is within the scope of mole 2 in addition 800 ~ 1500m lake region, bucket-wheel suction dredger 11 is travelled to this region, complete with mud delivery pipeline 12 connect the spread work such as card after, excavate, bucket wheel 13 digs out after the clay crushing of lakebed, the earth dug out is delivered to by mud delivery pipeline 12 the hydraulic reclamation district 1 specified and carries out hydraulic reclamation by the high-power centrifugal dredge pump that bucket-wheel suction dredger 11 assembles, and sees Fig. 4.
Step 5, arranges and is shaped
Adopt wetland excavator the part exceeding described hydraulic reclamation district separating cofferdam 3 to be evened out, and carry out smooth to the surface in hydraulic reclamation district 1, form the artificial swamp met design requirement.
A specific embodiment of the application being only above, but the not limited thereto the changes that any person skilled in the art can think of of the application, all should drop in the protection domain of the application.
Claims (8)
1. fill a process for artificial swamp in territory, Lake District fast, be provided with more than one sub-lake, the water channel landscape water body of one or more in territory, described Lake District, it is characterized in that: the concrete operation step filling artificial swamp is as follows:
(1) hydraulic reclamation district is preset
The layout of zygote lake, water channel, the outer rim along territory, described Lake District arranges mole, in the inside in territory, described Lake District, arranges respectively separate cofferdam at the periphery of Zi Hu, water channel; The setting in described mole and described separation cofferdam defines the separate hydraulic reclamation district of more than two pieces;
(2) mole is filled
The method adopting jackstone to fill fills mole;
(3) separation cofferdam is filled
Adopt the method in homogeneous soil cofferdam, fetch earth to fill in described hydraulic reclamation district and separate cofferdam;
(4) hydraulic reclamation earth material
Mud delivery pipeline is set, one end of mud delivery pipeline is connected with bucket-wheel suction dredger, the other end of mud delivery pipeline is extended to described hydraulic reclamation district; The earth dug out is delivered to described hydraulic reclamation district by described mud delivery pipeline;
(5) shaping is arranged
If the height in described separation cofferdam exceeds the height in described hydraulic reclamation district, even the part separated and cofferdam exceeds out, and carry out smooth to the surface in described hydraulic reclamation district, namely complete filling of artificial swamp.
2. a kind of process of filling artificial swamp in territory, Lake District fast according to claim 1, is characterized in that, described step (4) concrete operations are:
Described bucket-wheel suction dredger is utilized to excavate the lakebed within the scope of 800 ~ 1500m lake region beyond described mole.
3. a kind of process of filling artificial swamp in territory, Lake District fast according to claim 1 and 2, it is characterized in that, described step (4) concrete operations are: utilize the high-power centrifugal dredge pump that described bucket-wheel suction dredger assembles that the earth dug out is delivered to described hydraulic reclamation district by described mud delivery pipeline.
4. a kind of process of filling artificial swamp in territory, Lake District fast according to claim 1, is characterized in that, described step (2) concrete operations are:
Utilizing stone to refute is transported near surface of filling by filling described trunk of breakwater building stones, and power ship arranges hydraulic backhoe, utilizes this hydraulic backhoe described to refute middle crawl building stones from described stone and fills.
5. a kind of process of filling artificial swamp in territory, Lake District fast according to claim 1, is characterized in that, described step (3) concrete operations are:
Power ship arranges hydraulic backhoe, utilizes described hydraulic backhoe to fetch earth in described hydraulic reclamation district and fill.
6. a kind of process of filling artificial swamp in territory, Lake District fast according to claim 1, it is characterized in that: the top width of described mole is 1.0 ~ 2.0m, rise as at least higher than ordinary water level 0.5m, the gradient of interior side slope is 1:1.5, and the gradient of outer side slope is 1:1.5 ~ 1:2.
7. a kind of process of filling artificial swamp in territory, Lake District fast according to claim 6, is characterized in that: in described interior side slope, add the hardcore bed that thickness is 0.5m, described hardcore bed is laid one deck high-strength geotextile; The mass area ratio of described high-strength geotextile is not less than 400g/m
2, ultimate tensile strength is not less than 12.5kN/m.
8. a kind of process of filling artificial swamp in territory, Lake District fast according to claim 1, is characterized in that: the top width 3.0 ~ 5.0m in described separation cofferdam, rises as at least higher than ordinary water level 0.5m, and side slope is shaped by depositional gradient under water.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104787891A (en) * | 2015-03-24 | 2015-07-22 | 中国林业科学研究院林业新技术研究所 | Algal blooming ecological control system based on micro-terrain reconstruction, ecological method for controlling algal blooming and application |
| CN104963349B (en) * | 2015-06-30 | 2017-02-01 | 南通理工学院 | Construction method for backfilling of underground foundation pit excavation soil |
| CN107574829B (en) * | 2017-08-28 | 2019-11-19 | 中交广州航道局有限公司 | A kind of floating type Temporary Cofferdam and its quick fill method |
| CN109626581A (en) * | 2018-12-18 | 2019-04-16 | 中交上海航道勘察设计研究院有限公司 | A kind of method of hydraulic reclamation silty sand and fine sand construction artificial swamp |
| CN111937689A (en) * | 2020-08-10 | 2020-11-17 | 中交第四航务工程局有限公司 | Method for ecologically solidifying dredged soil by planting specific plants |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59220511A (en) * | 1983-05-30 | 1984-12-12 | Kowan Kankyo Eng:Kk | Prevention of swelling of dredged and reclaimed sludge |
| JP2001226941A (en) * | 2000-02-21 | 2001-08-24 | Ohmoto Gumi Co Ltd | Construction work method of structure for reclamation and form barge |
| CN101424082A (en) * | 2008-10-17 | 2009-05-06 | 安徽省水利水电勘测设计院 | Technique for building quick-speed consolidated platform near water by using clay under lake |
| CN103205951A (en) * | 2012-01-12 | 2013-07-17 | 中交上海航道勘察设计研究院有限公司 | Sludge-type soil combined secondary dike-back pressure diking method |
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2013
- 2013-08-19 CN CN201310359181.2A patent/CN103397646B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59220511A (en) * | 1983-05-30 | 1984-12-12 | Kowan Kankyo Eng:Kk | Prevention of swelling of dredged and reclaimed sludge |
| JP2001226941A (en) * | 2000-02-21 | 2001-08-24 | Ohmoto Gumi Co Ltd | Construction work method of structure for reclamation and form barge |
| CN101424082A (en) * | 2008-10-17 | 2009-05-06 | 安徽省水利水电勘测设计院 | Technique for building quick-speed consolidated platform near water by using clay under lake |
| CN103205951A (en) * | 2012-01-12 | 2013-07-17 | 中交上海航道勘察设计研究院有限公司 | Sludge-type soil combined secondary dike-back pressure diking method |
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