CN105735198B - A kind of method that diatomite prefabricated component constructs composite river - Google Patents
A kind of method that diatomite prefabricated component constructs composite river Download PDFInfo
- Publication number
- CN105735198B CN105735198B CN201610087161.8A CN201610087161A CN105735198B CN 105735198 B CN105735198 B CN 105735198B CN 201610087161 A CN201610087161 A CN 201610087161A CN 105735198 B CN105735198 B CN 105735198B
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- diatomite
- river
- part body
- panel
- prefabricated
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/14—Preformed blocks or slabs for forming essentially continuous surfaces; Arrangements thereof
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Revetment (AREA)
Abstract
The invention discloses a kind of diatomite prefabricated component,Including diatomite prefabricated part body,It is characterized in that,The diatomite prefabricated part body includes upper strata panel,Lower floor's panel,Connect panel,Vertical connecting hole and groove structure,The upper strata panel,The thickness of lower floor's panel and the connection panel is disposed as 50 100cm,The upper strata panel,Lower floor's panel and the connection panel form the groove structure of a semi-surrounding,The long axis direction of the diatomite prefabricated part body is L-shaped structure,The cross section of the diatomite prefabricated part body is arranged to " work " type structure,The diatomite prefabricated part body is provided with the vertical connecting hole at three on long axis direction,Spud pile is additionally provided with the diatomite prefabricated component,The spud pile can be stacked the diatomite prefabricated part body by the vertical connecting hole.
Description
Technical field
The present invention relates to the field for constructing composite river, more particularly to a kind of diatomite prefabricated component and its construct composite river
Method.
Background technology
Show according to the study, China's water environment is faced with the multi-party surface pressure such as water pollution, shortage of water resources and flood.
Wherein, water pollution exacerbates shortage of water resources, and water ecological environment destroys promotes flood to take place frequently again, and river pollution refers to directly
Connect or be discharged into indirectly the phenomenon that the pollutant in river causes quality of river water to deteriorate.In rural area, excessive apply of chemical fertilizer and agricultural chemicals is made
Flowed into a large amount of chemical fertilizer, agricultural chemicals with precipitation or irrigation water in river course, turn into important pollution of area source, as China is in point-source pollution
Improvement rate greatly improves, and pollution of area source has become the key issue of quality of water environment improvement.
Wetland is used as " kidney of the earth ", is responsible for the purification to earth natural water and processing function.Artificial wet land system
For water purification technology as a kind of novel ecological method for cleaning treatment of sewage, its general principle is planted on Performance of Constructed Wetlands Substrates
Specific wetland plant, so as to set up a Constructed Wetland Ecology System.When sewage passes through wet land system, pollution therein
Material and nutriment are absorbed or decomposed by system, and are purified water quality.
In stream structure, composite river refers to the river course for having alluvial flat.During flood, in composite river, alluvial flat
After being submerged, because main stem and beach have the different depth of water and a roughness, " water level-flow " relation of composite river will with it is single
River course is different.And when current overbank, due to the interaction of major trough current and beach current, channel section crosses water energy
Power would generally reduce.Particularly current are when overbank, due to the mutation of section configuration, plus beach roughness typically and main stem
Different, section regimen is complicated.
Natural river course alluvial flat refers to be located at riverbed major trough one or both sides, is submerged in flood, exposure when in low water
Beach；Namely refer to the lowest point part beyond riverbed that the river flood phase floods.Lateral transfer and flood of the alluvial flat by river
The deposition that water overflows dike is collectively forming, and it is the riverbed constantly result of lateral movement and river cycle sexploitation.
Under fluviation, usually a bank is accumulated by lateral erosion, another bank in riverbed, and then position constantly occurs for riverbed
Move.By the bank accumulated, point bar is formed by riverbed deposit, with the sidesway in riverbed, alluvial flat constantly expands.Said process
The alluvial flat of formation, its top are made up of the plasma deposited during flooding of rivers, and bottom is displaced sideways process by riverbed
The middle coarse material composition deposited.The deposit structure of this lower thick upper thin, claim dual phase structure.The plasma on top
Alluvial flat is claimed mutually to deposit, mostly sandy loam or lam；The coarse material of bottom claims bed phase to deposit, mostly sand, gravel.Some slopes
The anxious mountain stream of steep stream, corrosion function is stronger, and riverbed both sides usually retain without deposit, only narrow stone matter overbank,
Or the overbank of only thick gravel composition.Typically only just have thicker in broad river valley or the alluvial flat of plains region
Binary-phase deposits.
In composite river, overbank and surrounding land inland water ecotone usually grow a large amount of plants, especially all kinds of aquatic plants
Thing, the wet land system that above-mentioned natural process is formed have played important rental for purifying river pollutant, lifting water quality of river.Separately
Outside, by manually establishing and recovering riverine wetland, also as the important technology method of river water reparation.
Therefore, prior art has yet to be improved and developed.
The content of the invention
In view of above-mentioned the deficiencies in the prior art, it is an object of the invention to provide a kind of diatomite prefabricated component and its are constructed multiple
The method in formula river course, it is intended to solve the problems, such as that alluvial flat constantly expands, water environment constantly deteriorates, water quality situation getting worse.
Technical scheme is as follows：
A kind of diatomite prefabricated component, including diatomite prefabricated part body, wherein, the diatomite prefabricated part body includes upper
Deck panels, lower floor's panel, connection panel, vertical connecting hole and groove structure, the upper strata panel, lower floor's panel and
The thickness of the connection panel is disposed as 50-100cm, the upper strata panel, lower floor's panel and the connection panel
Form the groove structure of a semi-surrounding, the long axis direction of the diatomite prefabricated part body is L-shaped structure, the silicon
The cross section of diatomaceous earth prefabricated part body is arranged to " work " type structure, and the diatomite prefabricated part body is provided with long axis direction
The vertical connecting hole at three, spud pile is additionally provided with the diatomite prefabricated component, the spud pile passes through the vertical company
Connecing hole can make the diatomite prefabricated part body carry out stacking side.
A kind of method that diatomite prefabricated component constructs composite river comprises the following steps：
First, diatomite, clay and coal dust are mixed, wherein, diatomaceous ratio is 60-75%, the ratio of clay
For 10-20%, the ratio of coal dust is 10-15%；
Second, said mixture is fired into the diatomite prefabricated part body, " work " font monomer structure, lift structure
Body roughness, promote water body turbulent flow to be formed, be advantageous to river reoxygenation and laterally disturb, promote purifying river water, lift water quality；
3rd, the diatomite prefabricated part body baked is vertically stacked at alluvial flat, stacked structure peak is situated between
Between river period when a river is at its normal level water level and flood level, the effect for separating the river water surface and overbank is realized；
4th, the spud pile connects multiple diatomite prefabricated part bodies by the vertical connecting hole.
The method that described diatomite prefabricated component constructs composite river, wherein, it is diatomite described in the mixture, described
The ratio of clay and the coal dust is respectively 6: 1.2: 1.
The method that described diatomite prefabricated component constructs composite river, wherein, the diatomite prefabricated component sheet baked
Stackable body is tight type, is seamlessly connected.
The method that described diatomite prefabricated component constructs composite river, wherein, the diatomite prefabricated component sheet baked
Stackable body is loose type, and gap is left between monomer and monomer in loose type stack manner, and many places are built on facade is stacked
Cavity, it is easy to fish and planktonic organism to pass through.
The method that described diatomite prefabricated component constructs composite river, wherein, the spud pile is the columns such as pile, drill rod
Thing.
The method that described diatomite prefabricated component constructs composite river, wherein, the diatomite prefabricated component sheet baked
Body may be stacked on alluvial flat convex bank edge, extend to the korneforos heart, three faces are piled up by diatomite prefabricated component and surrounded in addition
Relative closure pond space, as " water surface-riverbank " intermediate zone, water surface opposite outer river geo-stationary is enclosed in the pond,
Can cultivate in the inner very water, swim and sink water water plant, also provide habitat for all kinds of aquatic animals, form Wetland ecological
System.
The present invention provides a kind of diatomite prefabricated component and its method for constructing composite river, passes through the monomer structure of prefabricated component
Designed for " work " type, can lift structure body roughness, the turbulent formation of promotion water body, favourable river reoxygenation and laterally disturbance, promotion
Purifying river water, water quality is lifted, improve water body environment.
Brief description of the drawings：
Fig. 1 is the structural representation of diatomite prefabricated component monomer structure in the present invention；
Fig. 2 is the Close stack schematic diagram of diatomite prefabricated component monomer structure in the present invention；
Fig. 3 is the loose stack manner schematic diagram of diatomite prefabricated component monomer structure in the present invention；
Fig. 4 is the overall structure diagram of composite river in the present invention.
Embodiment
The invention provides diatomite prefabricated component and its method for constructing composite river, to make the purpose of the present invention, technology
Scheme and effect are clearer, clear and definite, and the present invention is described in more detail below.It is it should be appreciated that described herein specific
Embodiment only to explain the present invention, is not intended to limit the present invention.
The embodiments of the invention provide a kind of diatomite prefabricated component, Fig. 1 is diatomite prefabricated component monomer structure in the present invention
Structural representation, as shown in figure 1, diatomite prefabricated component monomer structure includes diatomite prefabricated part body, the diatomite is pre-
Product body includes upper strata panel 1, lower floor's panel 2, connection panel 3, vertical connecting hole 4 and groove structure 5, the face layer
The thickness of plate 1, lower floor's panel 2 and the connection panel 3 is disposed as 50-100cm, the upper strata panel 1, it is described under
Deck panels 2 and the connection panel 3 form the groove structure 5 of a semi-surrounding, the diatomite prefabricated part body
Long axis direction is L-shaped structure, and the cross section of the diatomite prefabricated part body is arranged to " work " type structure, and the diatomite is pre-
Product body is provided with the vertical connecting hole 4 at three on long axis direction, and Fig. 2 is diatomite prefabricated component monomer knot in the present invention
The Close stack schematic diagram of structure, Fig. 3 are the loose stack manner schematic diagram of diatomite prefabricated component monomer structure in the present invention,
As shown in FIG. 2 and 3, spud pile 5 is additionally provided with the diatomite prefabricated component, the spud pile 5 passes through the vertical company
Connecing hole 4 can be stacked the diatomite prefabricated part body.
The method that a kind of diatomite prefabricated component provided by the invention constructs composite river comprises the following steps：First, by silicon
Diatomaceous earth, clay and coal dust mixing, wherein, diatomaceous ratio is 60-75%, and the ratio of clay is 10-20%, the ratio of coal dust
Example is 10-15%；
Second, said mixture is fired into the diatomite prefabricated part body, " work " font monomer structure, lift structure
Body roughness, promote water body turbulent flow to be formed, be advantageous to river reoxygenation and laterally disturb, promote purifying river water, lift water quality；
3rd, the diatomite prefabricated part body baked is vertically stacked at alluvial flat, stacked structure peak is situated between
Between river period when a river is at its normal level water level and flood level, the effect for separating the river water surface and overbank is realized；
4th, the spud pile 5 connects multiple diatomite prefabricated part bodies by the vertical connecting hole 4.
Further scheme, the ratio of diatomite, the clay and the coal dust is respectively 6 described in the mixture
∶1.2∶1.Such a mixture can reach its physical characteristic, and pH value is neutral, nontoxic, and suspendability is good, and absorption property is strong, unit weight
Gently, oil absorbency 115%, fineness are well mixed, are more beneficial for improving water environment in the mesh of 325 mesh~500.
Further scheme, the stackable diatomite prefabricated part body baked is tight type, because diatomaceous
Loose and porous structure, tight type stack the connectedness for also not interfering with water body.
Further scheme, it is loose type that the diatomite prefabricated part body baked is stackable, loose type stacking side
Gap is left in formula between monomer and monomer, many places cavity is built on facade is stacked, is easy to fish and planktonic organism to pass through.
Further scheme, the spud pile 5 are the columns such as pile, drill rod.
Further scheme, the diatomite prefabricated part body baked may be stacked on alluvial flat convex bank edge, to
The korneforos heart extends, and three faces is are piled up the relative closure pond space surrounded by diatomite prefabricated component in addition, as " the water surface-river
Bank " intermediate zone.Water surface opposite outer river geo-stationary is enclosed in the pond, can cultivate in the inner very water, swim and sink water water
Plant, habitat also is provided for all kinds of aquatic animals, forms wetlands ecosystems, complete the Ecology Action of purifying water body,
From river course aspect, concave bank corrodes, convex bank accumulation.Therefore surround the pool in convex bank, no matter obvious river shoal is whether there is at this, make it
The foundation that can be cultivated as alluvial flat and gradually grow up, be advantageous to the deposition for all kinds of particulate matters that flood is brought, promote
The formation of overbank and forward direction are developed, and accelerate natural river course to develop to composite river, form peninsular bank band structure in appearance, are wet
Plant provides material and relies on basis, and then realizes water quality of river improvement and enhancing effect.From river course cross-section profile analysis, the closing
Pool structure, the pollution of area source of the runoff such as precipitation carrying on the bank can be entered row buffering, settle granulating material in the stream interface source of river footpath,
The nutritive salt material such as nitrogen source, phosphorus element, control river surface source import pathway are provided for wetland in the pool, and cuts down it and enters water body load.
Meanwhile Fig. 4 is the overall structure diagram of composite river in the present invention, as shown in figure 4, using diatomite prefabricated component
Composite river is constructed, even if after using the long period, such as occurring to crush, or the inferior of overbank is buried in, due to diatomite
Environment-friendly feature, also not entail dangers to river channel ecology internal system harmonious relationships, in view of the stabilization of its own, loose porous etc.
Physicochemical characteristic, moreover it is possible to play and improve river bottom mud aeration, favourable oxidation environment is formed, and adsorbs traces nutriment
Deng Ecology Action, persistent, it may not be necessary to which artificial clear wash in a pan removes from water body.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can
To be improved or converted according to the above description, all these modifications and variations should all belong to the guarantor of appended claims of the present invention
Protect scope.
Claims (6)
1. a kind of method that diatomite prefabricated component constructs composite river, it includes diatomite prefabricated part body, and the diatomite is pre-
Product body includes upper strata panel, lower floor's panel, connection panel, vertical connecting hole and groove structure, the upper strata panel, institute
The thickness for stating lower floor's panel and the connection panel is disposed as 50-100cm, the upper strata panel, lower floor's panel with
And the connection panel forms the groove structure of a semi-surrounding, the long axis direction of the diatomite prefabricated part body is
L-shaped structure, the cross section of the diatomite prefabricated part body are arranged to " work " type structure, and the diatomite prefabricated part body exists
The vertical connecting hole at three is provided with long axis direction, spud pile, the fixation are additionally provided with the diatomite prefabricated component
Stake can be stacked the diatomite prefabricated part body by the vertical connecting hole, it is characterised in that construct composite river
Method comprise the following steps：
First, diatomite, clay and coal dust are mixed, wherein, diatomaceous ratio is 60-75%, and the ratio of clay is 10-
20%, the ratio of coal dust is 10-15%；
Second, said mixture is fired into the diatomite prefabricated part body, " work " font monomer structure, lift structure body is thick
Rugosity, promote water body turbulent flow to be formed, be advantageous to river reoxygenation and laterally disturb, promote purifying river water, lift water quality；
3rd, the diatomite prefabricated part body baked is vertically stacked at alluvial flat, makes stacked structure peak between river
Flow between period when a river is at its normal level water level and flood level, realize the effect for separating the river water surface and overbank；
4th, the spud pile connects multiple diatomite prefabricated part bodies by the vertical connecting hole.
2. the method that diatomite prefabricated component according to claim 1 constructs composite river, it is characterised in that the mixture
Described in the ratio of diatomite, the clay and the coal dust be respectively 6: 1.2: 1.
3. the method that diatomite prefabricated component according to claim 2 constructs composite river, it is characterised in that the institute baked
State diatomite prefabricated part body and be stacked as tight type, be seamlessly connected.
4. the method that diatomite prefabricated component according to claim 2 constructs composite river, it is characterised in that the institute baked
State diatomite prefabricated part body and be stacked as loose type, gap is left between monomer and monomer in loose type stack manner, is being stacked
Many places cavity is built on facade, is easy to fish and planktonic organism to pass through.
5. the method that the diatomite prefabricated component according to Claims 2 or 3 constructs composite river, it is characterised in that described solid
Stake is determined for pile, drill rod.
6. the method that diatomite prefabricated component according to claim 5 constructs composite river, it is characterised in that the institute baked
State diatomite prefabricated part body and be stacked on alluvial flat convex bank edge, extend to the korneforos heart, three faces are prefabricated by diatomite in addition
The relative closure pond space that part is piled up and surrounded, as " water surface-riverbank " intermediate zone, enclose water surface opposite outer in the pond
River geo-stationary, cultivate in the inner and endure water, swim and sink water water plant, also provide habitat for all kinds of aquatic animals,
Form wetlands ecosystems.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610087161.8A CN105735198B (en) | 2016-01-29 | 2016-01-29 | A kind of method that diatomite prefabricated component constructs composite river |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610087161.8A CN105735198B (en) | 2016-01-29 | 2016-01-29 | A kind of method that diatomite prefabricated component constructs composite river |
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| CN105735198A CN105735198A (en) | 2016-07-06 |
| CN105735198B true CN105735198B (en) | 2017-11-14 |
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| CN115708491B (en) * | 2022-11-16 | 2024-02-20 | 江苏海洋大学 | Culture substrate of buried shellfish and application of culture substrate in buried shellfish culture |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2873883Y (en) * | 2006-02-11 | 2007-02-28 | 襄樊学院 | Rope connection type afforestation hollow block |
| CN101597907A (en) * | 2009-06-16 | 2009-12-09 | 梁菊明 | A kind of ecological block |
| CN102286956A (en) * | 2011-07-08 | 2011-12-21 | 浙江省交通规划设计研究院 | Flexible scour prevention facing system and implementation method thereof |
| CN202925514U (en) * | 2012-06-30 | 2013-05-08 | 北京东方园林股份有限公司 | Layered platform type hydrophilic landscape bank protection system |
| CN204919478U (en) * | 2015-08-17 | 2015-12-30 | 南京金埔园林股份有限公司 | Concrete block but water purification's complex is permeated water |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040078366A (en) * | 2003-03-04 | 2004-09-10 | (주)레코기술 | Pannel Type Block for Retaining Wall and Retaining Wall Structure Using the Same |
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2016
- 2016-01-29 CN CN201610087161.8A patent/CN105735198B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2873883Y (en) * | 2006-02-11 | 2007-02-28 | 襄樊学院 | Rope connection type afforestation hollow block |
| CN101597907A (en) * | 2009-06-16 | 2009-12-09 | 梁菊明 | A kind of ecological block |
| CN102286956A (en) * | 2011-07-08 | 2011-12-21 | 浙江省交通规划设计研究院 | Flexible scour prevention facing system and implementation method thereof |
| CN202925514U (en) * | 2012-06-30 | 2013-05-08 | 北京东方园林股份有限公司 | Layered platform type hydrophilic landscape bank protection system |
| CN204919478U (en) * | 2015-08-17 | 2015-12-30 | 南京金埔园林股份有限公司 | Concrete block but water purification's complex is permeated water |
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