CN112411469A - Modularized constructed wetland filler, assembled revetment prefabricated module and laying method thereof - Google Patents
Modularized constructed wetland filler, assembled revetment prefabricated module and laying method thereof Download PDFInfo
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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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
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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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/001—Runoff or storm water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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Abstract
The invention provides a modularized constructed wetland filler, an assembled revetment prefabricated module and a laying method thereof. The prefabricated assembly type revetment modules are processing units consisting of a plurality of stepped revetment outer frames formed by assembly type components and modular constructed wetland fillers filled in the stepped revetment outer frames; the assembly type components comprise a plurality of L-shaped assembly type components and a straight assembly type component. The modular constructed wetland filler composition comprises a first layer of filler, a second layer of filler, a third layer of filler, a filter fabric and a porous pipeline which are sequentially arranged from top to bottom, wherein initial rainwater and tail water of a sewage treatment plant flow downwards step by step in a pipeline series connection mode, and finally the initial rainwater and the tail water reach a purification standard and then are discharged into a peripheral river channel. The invention can realize deep purification of initial rainwater and tail water of a sewage plant, has certain flood control capability, constructs a waterfront space, improves the landscape effect of a river channel, can realize assembly type large-scale production, and is convenient to maintain.
Description
Technical Field
The invention relates to the technical field of constructed wetland fillers and revetment, in particular to a modular constructed wetland filler, an assembled revetment prefabricated module and a laying method thereof.
Background
At present, the construction of building is mainly protected for the needs that satisfy flood control drainage, and the better engineering area of geological conditions generally adopts traditional gravity type grout stone retaining wall, concrete retaining wall isotructure, and it is leading with the site pouring, forms grey structure. However, the protective building not only artificially divides river water and soil, but also is difficult to form water and soil free exchange to enable the river water to be self-cleaned, and has the defects of high efficiency, energy conservation and environmental protection because a large amount of templates are needed due to the adoption of a large amount of cast-in-place structures, the construction period is long, and a large amount of building materials are wasted. At present, no protective structure which can meet the requirements of flood control and drainage of a river channel, can purify water quality, is easy to maintain and beautifies a city is available in an engineering area with good geological conditions.
The artificial wetland mainly utilizes the physical, chemical and biological synergistic effects of soil, artificial media, plants and microorganisms to treat sewage and sludge, but the filler of the artificial wetland is easy to block, the purification effect is influenced, and the conventional replacement mode is complex. The ecological revetment is a retaining wall which not only can play a role of ecological environmental protection, but also has a landscape function and can prevent water and soil loss. The amphibious boundary area has the characteristics of both water area and land.
Utility model patent with application number CN209098445U discloses a compound revetment repair system. The composite revetment repair system comprises at least one revetment module arranged on a barge line and an ecological floating bed module arranged on a river channel; the revetment module includes the gabion frame, locates the purification unit in the gabion frame, locates the top of purification unit, is close to the biological carrier unit of water one side, plant the firm soil plant on the biological carrier unit, the gabion frame sets up along the revetment line, and the bottom of the gabion frame of below is equipped with the bed course.
The utility model with application number CN205821127U discloses an ecological revetment. This ecological revetment has the slope, includes upwards to arrange in proper order by the river and forms a plurality of planting device of slope, planting device is including planting body, water storage bearing structure and container, it includes planting layer and the filter layer that from top to bottom sets gradually to plant the body, water storage bearing structure sets up and plants the body below, it all is located the container to plant body and water storage bearing structure, water storage bearing structure is rainwater collection module.
The invention patent with the application number of CN209352644U discloses an artificial wetland filler module and a modular artificial wetland. The filler module comprises a framework filling layer and an active bacterium layer arranged below the framework filling layer; the skeleton filling layer comprises an oyster shell skeleton and filler particles filled in a cavity of the oyster shell skeleton, and the filler particles comprise zeolite particles and/or sand.
However, the above-described revetment or wetland system has the following drawbacks: 1) the filler or the purification unit can not be replaced and adjusted in time according to the requirements of treatment at different periods, and the environment adaptability is insufficient; or, 2) the filler or the purification unit is not easy to replace, and the later maintenance cost cannot be adjusted quickly according to the sewage conditions in different periods; or, 3) the water treatment purification system is not sufficient; or 4) large-scale production cannot be realized, rapid installation cannot be carried out, the construction period is long, the cost is high, and the method is not economical and environment-friendly.
In view of the above, there is a need for an improved modular constructed wetland filler, an assembled revetment prefabrication module and a laying method thereof to solve the above problems.
Disclosure of Invention
The invention aims to provide a modular constructed wetland filler, an assembled revetment prefabricated module and a laying method thereof, which can effectively solve the problem of deep purification of initial rainwater and tail water of a sewage plant, are convenient for replacing the filler and form a modular product.
In order to achieve the purpose, the invention provides an assembly type revetment prefabricating module which is a processing unit consisting of a plurality of step-shaped revetment outer frames formed by assembly type components and modular constructed wetland fillers filled in the step-shaped revetment outer frames; the assembly type components comprise a plurality of L-shaped assembly type components and a straight assembly type component;
the assembled components are spliced into a whole in a joggled manner along the width direction (namely, the front and back directions) of the river channel, and are fixedly connected into a whole through sliding grooves along the length direction (namely, the horizontal left and right directions) of the river channel.
As a further improvement of the invention, the fabricated member adopts a straight outer frame strip cast by C30 reinforced concrete; the straight-line-shaped assembly component is a vertical straight-line-shaped outer frame strip; the L-shaped assembly component consists of a vertical linear outer frame strip and a horizontal linear outer frame strip which are vertically crossed; the length of straight line shape exterior frame strip is 2000 ~ 4000mm, and the width is 1000 ~ 2000mm, and the component thickness is 100 ~ 200 mm.
As a further improvement of the invention, the length of the straight-line-shaped outer frame strip is 3000mm, the width is 1500mm, and the thickness of the component is 150 mm.
As a further improvement of the invention, a plurality of grooves with different heights are arranged on the side wall of the vertical straight-line-shaped outer frame strip; the side wall of the horizontal linear outer frame strip is provided with a bulge which is matched with the groove in a joggled manner;
in the width direction of the river channel, two adjacent assembled components are connected through the matching of the grooves and the protrusions to form mounting grooves for accommodating the modular artificial wetland fillers.
As a further improvement of the invention, the two peripheral walls of the vertical linear outer frame strip along the length direction of the river channel are respectively provided with a slide bar and a sliding chute which are matched with each other;
in the length direction of the river channel, two adjacent assembled components are fixedly connected into a whole through the mutual matching of the sliding strips and the sliding grooves.
As a further improvement of the present invention, a plurality of receiving grooves which are recessed inwards and used for receiving and placing an on-line monitoring device are arranged on the other side wall of the vertical straight-line-shaped outer frame strip.
As a further improvement of the invention, a hydrophilic stepped footpath in the vertical direction is arranged between two adjacent sections of the prefabricated module of the fabricated revetment; the hydrophilic stepped walkway is a plastic-wood bottom walkway made of organic polymer materials.
As a further improvement of the invention, the bottom of the fabricated revetment prefabricating module is provided with a settlement prevention layer; the anti-settling layer is a plastic-wood anti-settling layer made of an organic polymer material.
In order to achieve the purpose, the invention also provides a modularized constructed wetland filler which is used for filling the fabricated revetment prefabricated module; the modularized artificial wetland filler is a prefabricated integral filler and comprises an outer frame and filler contents; the outer frame is made of glass fiber reinforced plastic, and water permeable holes are distributed in the outer frame;
the filler content comprises a first layer of filler, a second layer of filler, a third layer of filler, a filter fabric and a porous pipeline which are arranged from top to bottom in sequence.
As a further improvement of the invention, the contents in the filler contents can be selected according to requirements, and each layer of filler and each level of wetland filler can be selected from different types.
As a further improvement of the invention, the porous pipeline comprises a water inlet pipe and a water outlet pipe; and the plurality of porous pipelines of the modular artificial wetland filler are connected by a sleeve, so that the plurality of porous pipelines of the modular artificial wetland filler are connected in series.
As a further improvement of the invention, the filter fabric is laid between the third layer of filler and the porous pipeline in a wet filtration mode and used for blocking the filler particles from blocking the porous pipeline.
In order to achieve the above object, the present invention further provides a method for laying the prefabricated assembly revetment module, comprising the following steps:
s1, carrying out excavation and foundation tamping engineering pretreatment, prefabricating the prefabricated assembly revetment by adopting an assembly type technology, and transporting the prefabricated assembly type components and the finished product of the modularized artificial wetland filler to a site for assembly;
s2, arranging a sand cushion layer below the assembly type member, wherein the sand cushion layer is formed by paving thick sand and compacting, the thickness of the sand cushion layer is 0.08-0.15 m, and the sand cushion layer is used for isolating a concrete member foundation from a lower soil layer so as to ensure the stability of a revetment structure;
s3, when the installation is carried out, the I-shaped assembly type components are installed on the upstream face, a plurality of L-shaped assembly type components which are arranged adjacently are installed on the downstream face, and the assembly type components are mutually matched and connected to form a stepped revetment outer frame with the height gradually increased one by one; the overall height of the stepped revetment outer frame is 0.5-1 m above the normal water level line of the river channel;
s4, forming a mounting groove for accommodating the modular constructed wetland packing between two adjacent fabricated components; the outer frame of the modularized artificial wetland filler is provided with a hanging ring, the modularized artificial wetland filler can be directly hoisted during field construction, and the modularized artificial wetland filler is installed and filled in the installation groove, so that installation of a plurality of sections of the fabricated revetment prefabricated modules is completed; when the modularized artificial wetland filler is blocked, the modularized artificial wetland filler can be directly lifted for replacement.
The invention has the beneficial effects that:
1. the multistage artificial wetland type assembly revetment prefabricated module provided by the invention is prefabricated by an assembly technology, finished products can be transported to the site for assembly after the assembly component factory finishes production, large-scale production can be realized, the assembly site is low-carbon and environment-friendly, and the multistage artificial wetland type assembly revetment prefabricated module has the advantages of energy conservation, economy, shorter construction period, environment friendliness and the like. And the prefabricated module of this assembled revetment simple structure, reasonable in design, on-the-spot simple to operate can use on a large scale, saves the cost of labor. And adopt tertiary assembled component, can show its life that improves.
2. The prefabricated module of the assembled revetment is filled with modular constructed wetland filler, and a multi-stage constructed wetland purification mechanism is adopted, so that initial rainwater and tail water of a sewage treatment plant can be effectively purified, and the direct discharge of the initial rainwater and the tail water which does not reach the discharge standard to pollute a receiving water body is avoided.
3. The assembled revetment prefabricated module provided by the invention adopts modular constructed wetland fillers, can realize rapid assembly and replacement of the fillers, and can pre-plant wetland plants on the fillers on the uppermost layer, thereby avoiding field planting and maintenance. The filler has maintainability, greatly reduced later maintenance cost improves maintenance efficiency, and can carry out quick adjustment according to the sewage condition of different periods. And the modularized artificial wetland filler can be replaced and adjusted according to the treatment needs in different periods, and has better environment adaptability compared with the traditional filler in the prior art.
4. The fabricated revetment prefabricated module provided by the invention can absorb part of water, has certain water storage capacity, can relieve urban waterlogging, has certain flood control capacity, can construct a waterfront space, improves the landscape effect of a river channel, can realize fabricated large-scale production, and is convenient to maintain.
5. According to the fabricated revetment prefabricating module provided by the invention, the hydrophilic stepped plastic-wood bottom footpath in the vertical direction is arranged between two adjacent segments of the fabricated revetment prefabricating module, the wood grain patterns arranged on the plastic-wood bottom footpath can improve the appearance attractiveness of the footpath, and the high polymer material has the characteristics of water permeability, air permeability, corrosion resistance and the like, so that the attractiveness, the walking comfort, the water permeability and the air permeability of the footpath are well considered.
6. The assembled revetment prefabricated module provided by the invention has the advantages that the assembled components are linear outer frame strips, and the side walls of the vertical linear outer frame strips are provided with a plurality of grooves with different heights; the side wall of the horizontal straight-line-shaped outer frame strip is provided with a bulge which is matched with the groove in a joggled manner; through adjusting the matching connection of the grooves and the protrusions with different heights between the two adjacent assembled components, the depth of the mounting groove for accommodating the modularized artificial wetland filler can be regulated and controlled, so that the method is suitable for different application scenes and different filler thicknesses in the practical application process. The assembled revetment prefabricated module is assembled into a tightly combined whole in two different assembling modes, namely a joggle along the width direction of a river channel and a sliding groove connecting along the length direction of the river channel, and the assembling is convenient and quick.
Drawings
Fig. 1 is a front view of an assembled revetment prefabrication module provided by the present invention.
Fig. 2 is a top view of an assembled revetment prefabrication module provided by the present invention.
Fig. 3 is a side view of an assembled revetment prefabrication module provided by the present invention.
Fig. 4 is a schematic structural view of an "L" -shaped fabricated component of the fabricated revetment prefabricating module provided by the invention.
Fig. 5 is a schematic view of an assembly structure of the modular constructed wetland packing provided by the invention.
Fig. 6 is a schematic structural view of the modular constructed wetland filler provided by the invention.
Reference numerals
A 1-I stage processing unit; a 2-II stage processing unit; a 3-III stage processing unit; 4- "L" type assembled component; 5-I stage treatment unit water outlet pipeline; 6- "one" type assembled component; 7-a first layer of filler; 8-a second layer of filler; 9-a third layer of filler; a 10-I stage treatment unit water inlet pipeline; 11-phosphorus removal filler; 12-a groove; 13-II stage treatment unit water inlet pipeline; a 14-III stage treatment unit water outlet pipeline; 15-filtering the fabric; 16-a hoisting ring; 17-water permeable holes; 18-modular constructed wetland packing; 19-a slide bar; 20-a containing groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the present invention is provided in the following embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1 to 6, the present invention provides an assembly type revetment prefabricating module, which includes a stepped revetment outer frame composed of an "L" type assembly member 4 and a "one" type assembly member 6; in the width direction of the river channel, the L-shaped assembly type component 4 and the I-shaped assembly type component 6 which are adjacently arranged are matched and joggled with each other through a groove 12 and a protrusion (not marked in the figure) structure arranged on the side wall of the L-shaped assembly type component 6 to form an integral frame; in the length direction along the river channel, two adjacent L-shaped assembly type components 4 or two adjacent one-shaped assembly type components 6 are connected into an integral frame through a sliding strip 19 arranged on the peripheral wall of the assembly type components and a structural sliding groove of a sliding groove (not shown in the figure). The other side wall of the L-shaped assembled component 4 is further provided with a plurality of receiving grooves 20 which are recessed inwards and used for receiving and placing on-line monitoring equipment.
The stepped revetment outer frame and the modularized artificial wetland filler 18 filled in the stepped revetment outer frame form a I-stage treatment unit 1, a II-stage treatment unit 2 and a III-stage treatment unit 3 which are arranged in a stepped manner up and down.
The modularized artificial wetland filler 18 is a prefabricated integral filler and comprises an outer frame and filler contents; the outer frame is fully distributed with water permeable holes 17; the outer frame is also provided with a hanging ring 16.
The filler content comprises a first layer of filler 7, a second layer of filler 8, a third layer of filler 9, a filter fabric 15 and a porous pipeline which are arranged in sequence from top to bottom. The porous pipeline comprises an I-stage treatment unit water outlet pipeline 5, an I-stage treatment unit water inlet pipeline 10, a II-stage treatment unit water inlet pipeline 13 and a III-stage treatment unit water inlet pipeline 14 which are mutually sleeved.
The invention also provides a laying method of the prefabricated module of the assembled revetment, which comprises the following steps:
s1, carrying out excavation and foundation tamping engineering pretreatment, prefabricating the prefabricated assembly revetment by adopting an assembly type technology, and transporting the prefabricated assembly type components and the finished product of the modularized artificial wetland filler to a site for assembly;
s2, arranging a sand cushion layer below the assembly type member, wherein the sand cushion layer is formed by paving thick sand and compacting, the thickness of the sand cushion layer is 0.08-0.15 m, and the sand cushion layer is used for isolating a concrete member foundation from a lower soil layer so as to ensure the stability of a revetment structure;
s3, when the installation is carried out, the I-shaped assembly type components are installed on the upstream face, a plurality of L-shaped assembly type components which are arranged adjacently are installed on the downstream face, and the assembly type components are mutually matched and connected to form a stepped revetment outer frame with the height gradually increased one by one; the overall height of the outer frame of the stepped revetment is 0.5-1 m above the normal water level line of the river channel.
S4, forming a mounting groove for accommodating the modular constructed wetland packing between two adjacent fabricated components; the outer frame of the modularized artificial wetland filler is provided with a hanging ring, the modularized artificial wetland filler can be directly hoisted during field construction, and the modularized artificial wetland filler is installed and filled in the installation groove, so that installation of a plurality of sections of the fabricated revetment prefabricated modules is completed; when the modularized artificial wetland filler is blocked, the modularized artificial wetland filler can be directly lifted for replacement.
According to the requirement of practical application, the invention can also be provided with the following steps: s5, placing compound planting soil and planting plants on the filled modular constructed wetland fillers; and a hydrophilic stepped footpath in a vertical direction can be arranged between the two adjacent sections of the prefabricated assembly revetment modules.
Example 1
A method for laying prefabricated modules of an assembled revetment mainly comprises the following steps of foundation pit excavation, foundation tamping leveling, anti-settlement layer laying, assembled revetment member hoisting, pipe network laying, modularized artificial wetland filler hoisting, composite planting soil placement and plant planting in sequence in a field construction mode, wherein the steps comprise:
s1, in the whole installation process of the prefabricated assembly revetment module, firstly, excavation and foundation tamping projects are needed, then the prefabricated assembly revetment module is prefabricated by adopting an assembly technology, and prefabricated assembly components and finished products of the modularized artificial wetland filler are transported to the site for assembly.
S2, a sand cushion is arranged below the assembly type component foundation and is formed by paving thick sand and compacting the sand cushion, and the thickness of the sand cushion ranges from 0.08 m to 0.15m and is used for isolating the concrete component foundation from a lower soil layer so as to ensure the stability of the revetment structure.
S3, referring to fig. 1 to 3, when mounting, mounting one of the "one" shaped assembled members 6 on the upstream face, mounting three adjacent "L" shaped assembled members 4 on the downstream face, and joining the assembled members to form a whole by the groove and the convex joggle to form a stepped revetment outer frame with a stepped height which is increased one by one; the overall height of the outer frame of the stepped revetment is 0.5-1 m above the normal water level line of the river channel.
S4, forming a mounting groove for accommodating the modular constructed wetland packing between two adjacent fabricated components; the outer frame of the modular artificial wetland filler 18 is provided with a hanging ring 16, the modular artificial wetland filler can be directly hoisted during field construction, and the modular artificial wetland filler is installed and filled in the installation groove, so that installation of a plurality of sections of the fabricated revetment prefabricated modules is completed; when the modularized artificial wetland filler is blocked, the modularized artificial wetland filler can be directly lifted for replacement.
S5, placing compound planting soil and planting plants on the filled modular constructed wetland fillers; and a hydrophilic stepped footpath in a vertical direction can be arranged between the two adjacent sections of the prefabricated assembly revetment modules.
Referring to fig. 1 to 6, the prefabricated module for a fabricated revetment laid according to embodiment 1 of the present invention is composed of three processing units, mainly a first-stage processing unit 1, a second-stage processing unit 2, and a third-stage processing unit 3. The treatment unit can select the modularized artificial wetland filler with different filler contents according to treatment requirements to realize different removal effects, and the conventional removal sequence is sequentially denitrification, dephosphorization and COD removal along the water flow direction.
In the modularized artificial wetland filler, the filler thicknesses of the first layer of filler 7, the second layer of filler 8 and the third layer of filler 9 can be respectively adjusted according to actual requirements, and the common thickness is 30 cm.
The first layer of filler 7, the second layer of filler 8 and the third layer of filler 9 can be selected from the same filler or different fillers.
In this embodiment, the first layer of filler 7 is medical stone filler, the second layer of filler 8 is ceramsite, and the third layer of filler 9 is pebble.
The phosphorus removal filler 11 consists of 10 cm-thick ceramsite and 5 cm-thick sponge iron, and can effectively remove phosphorus.
The water permeable holes 17 on the modularized artificial wetland filler 18 can be adjusted according to the grain size grading of the filler, and the large-aperture modularized artificial wetland filler unit is used for filling limestone, zeolite and ceramsite fillers; the small-aperture modularized constructed wetland packing unit is characterized in that a layer of polyamide, polyolefin elastic packing or permeable non-woven fabric is attached to the periphery and the bottom of the inner wall of a module on the basis of a large-aperture module, is used for filling coarse sand, biochar, steel slag and soil packing, and can effectively prevent small-aperture particles from migrating to the lower layer of the wetland to cause blockage.
The modular constructed wetland packing 18 can be used in horizontal subsurface flow constructed wetland and vertical subsurface flow constructed wetland systems. The first layer of filler 7 can be covered with planting soil, so that wetland plants can be conveniently planted and grown, and wetland plants easy to grow can also be directly planted.
The filtering fabric 15 adopts a wet filtering mode, and the I-stage treatment unit water outlet pipeline 5, the I-stage treatment unit water inlet pipeline 10, the II-stage treatment unit water inlet pipeline 13 and the III-stage treatment unit water inlet pipeline 14 all adopt porous pipelines made of PVC materials.
Soil penetration tests are carried out on the first layer of filler 7, the second layer of filler 8 and the third layer of filler 9 before construction, the water permeability is guaranteed to be not less than 150mm/h, and water treated by the multistage artificial wetland type fabricated revetment reaches the V-type standard of 'surface water environmental quality standard' (GB 3838-2002).
In the fabricated revetment prefabricating module, the path of water flow is water drop inlet at the upper end of a I-stage treatment unit 1 → water outlet at the bottom of the I-stage treatment unit 1 → water inlet at the bottom of a II-stage treatment unit 2 → water outlet at the top of the II-stage treatment unit 2 → water inlet at the top of an overflowing III-stage treatment unit 3 → water collection at the bottom of the III-stage treatment unit 3 and drainage into peripheral water; by controlling the running water organization, the water treatment is more sufficient. In this embodiment, the diameter of the porous pipe is about 150mm, and the pores are uniformly distributed on the upper part of the drain pipe.
The plants planted in the embodiment are typical constructed wetland common plant varieties, and the following can be selected: manila, calamus, canna, allium fistulosum, reed, iris and eel grass.
In this embodiment, when the rainfall is too large and the river surface rises, the iii-level treatment unit 3 can be submerged, so that the iii-level treatment unit 3 can plant emergent aquatic plants to adapt to the situation of too high water level and enhance the landscape effect.
The prefabricated module of assembled revetment that provides in this embodiment includes three "L" type assembled components and a "style of calligraphy assembled component, and artifical wetland type assembled revetment prefabricated module passes through the recess and makes up into tertiary constructed wetland. The constructed wetland purification unit in the member consists of modular constructed wetland fillers, a first layer of fillers, a second layer of fillers, a third layer of fillers and filter fabric are sequentially arranged from top to bottom, and corresponding fillers can be selected according to different purification requirements to be made into modular fillers; porous pipelines are laid on the bottom and the top layer to achieve the purposes of water inlet and water outlet. The initial rainwater and the tail water of the sewage treatment plant flow downwards step by step through the three-stage artificial wetland type purification units connected in series, and finally the rainwater and the tail water reach the purification standard and are discharged into a peripheral river channel. The invention can realize deep purification of initial rainwater and tail water of a sewage plant, has certain flood control capability, constructs a waterfront space, improves the landscape effect of a river channel, can realize assembly type large-scale production, and is convenient to maintain.
In conclusion, the invention provides a modular constructed wetland filler, an assembly type revetment prefabricated module and a laying method thereof. The prefabricated assembly type revetment modules are processing units consisting of a plurality of stepped revetment outer frames formed by assembly type components and modular constructed wetland fillers filled in the stepped revetment outer frames; the assembly type components comprise a plurality of L-shaped assembly type components and a straight assembly type component. The modular constructed wetland filler composition comprises a first layer of filler, a second layer of filler, a third layer of filler, a filter fabric and a porous pipeline which are sequentially arranged from top to bottom, wherein initial rainwater and tail water of a sewage treatment plant flow downwards step by step in a pipeline series connection mode, and finally the initial rainwater and the tail water reach a purification standard and then are discharged into a peripheral river channel. The invention can realize deep purification of initial rainwater and tail water of a sewage plant, has certain flood control capability, constructs a waterfront space, improves the landscape effect of a river channel, can realize assembly type large-scale production, and is convenient to maintain.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a prefabricated module of assembled revetment which characterized in that: the prefabricated assembly type revetment modules are processing units consisting of a plurality of stepped revetment outer frames formed by assembly type components and modular constructed wetland fillers filled in the stepped revetment outer frames; the assembly type components comprise a plurality of L-shaped assembly type components and a straight assembly type component;
the assembled components are spliced into a whole in a joggle mode along the width direction of the river channel, and are fixedly connected into a whole through sliding grooves along the length direction of the river channel.
2. The fabricated revetment prefabricating module of claim 1, wherein: the assembly type component adopts a linear outer frame strip formed by pouring C30 reinforced concrete; the straight-line-shaped assembly component is a vertical straight-line-shaped outer frame strip; the L-shaped assembly component consists of a vertical linear outer frame strip and a horizontal linear outer frame strip which are vertically crossed; the length of straight line shape exterior frame strip is 2000 ~ 4000mm, and the width is 1000 ~ 2000mm, and thickness is 100 ~ 200 mm.
3. The fabricated revetment prefabricating module of claim 2, wherein: the side wall of the vertical straight-line-shaped outer frame strip is provided with a plurality of grooves with different heights; the side wall of the horizontal linear outer frame strip is provided with a bulge which is matched with the groove in a joggled manner;
in the width direction of the river channel, two adjacent assembled components are connected through the matching of the grooves and the protrusions to form mounting grooves for accommodating the modular artificial wetland fillers.
4. The fabricated revetment prefabricating module of claim 2, wherein: the two peripheral walls of the vertical linear outer frame strip along the length direction of the river channel are respectively provided with a slide bar and a sliding chute which are matched with each other;
in the length direction of the river channel, two adjacent assembled components are fixedly connected into a whole through the mutual matching of the sliding strips and the sliding grooves.
5. The fabricated revetment prefabricating module of claim 3, wherein: and a plurality of accommodating grooves which are inwards sunken and used for accommodating and placing on-line monitoring equipment are arranged on the other side wall of the vertical linear outer frame strip.
6. The fabricated revetment prefabricating module of claim 1, wherein: a hydrophilic stepped footpath in the width direction of the river channel is arranged between two adjacent sections of the fabricated revetment prefabricated modules; the hydrophilic stepped walkway is a plastic-wood bottom walkway made of an organic polymer material;
the bottom of the fabricated revetment prefabricated module is provided with an anti-settling layer; the anti-settling layer is a plastic-wood anti-settling layer made of an organic polymer material.
7. The modularized artificial wetland filler is characterized in that: the modular constructed wetland filler is used for filling the fabricated revetment prefabrication module of any one of claims 1 to 6; the modularized artificial wetland filler is a prefabricated integral filler and comprises an outer frame and filler contents; the outer frame is made of glass fiber reinforced plastic, and water permeable holes are distributed in the outer frame;
the filler content comprises a first layer of filler, a second layer of filler, a third layer of filler, a filter fabric and a porous pipeline which are arranged from top to bottom in sequence.
8. The modular constructed wetland filler of claim 7, wherein: the porous pipeline comprises a water inlet pipe and a water outlet pipe; and the plurality of porous pipelines of the modular artificial wetland filler are connected by a sleeve, so that the plurality of porous pipelines of the modular artificial wetland filler are connected in series.
9. The modular constructed wetland filler of claim 7, wherein: the filter fabric is laid between the third layer of filler and the porous pipeline in a wet filtration mode and is used for preventing filler particles from blocking the porous pipeline.
10. A method of laying a fabricated revetment prefabrication module according to any one of claims 1 to 6, wherein: the method comprises the following steps:
s1, carrying out excavation and foundation tamping engineering pretreatment, prefabricating the prefabricated assembly revetment by adopting an assembly type technology, and transporting the prefabricated assembly type components and the finished product of the modularized artificial wetland filler to a site for assembly;
s2, arranging a sand cushion layer for preventing sedimentation below the assembly type member, wherein the sand cushion layer is formed by paving thick sand and compacting, the thickness of the sand cushion layer is 0.08-0.15 m, and the sand cushion layer is used for isolating a concrete member foundation from a lower soil layer so as to ensure the stability of a revetment structure;
s3, when the installation is carried out, the I-shaped assembly type components are installed on the upstream face, a plurality of L-shaped assembly type components which are arranged adjacently are installed on the downstream face, and the assembly type components are mutually matched and connected to form a stepped revetment outer frame with the height gradually increased one by one; the overall height of the stepped revetment outer frame is 0.5-1 m above the normal water level line of the river channel;
s4, forming a mounting groove for accommodating the modular constructed wetland packing between two adjacent fabricated components; the outer frame of the modularized artificial wetland filler is provided with a hanging ring, the modularized artificial wetland filler can be directly hoisted during field construction, and the modularized artificial wetland filler is installed and filled in the installation groove, so that installation of a plurality of sections of the fabricated revetment prefabricated modules is completed; when the modularized artificial wetland filler is blocked, the modularized artificial wetland filler can be directly lifted for replacement.
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