CN209872521U - Vertical subsurface flow wetland system for preventing perforated pipes and fillers from being blocked - Google Patents

Vertical subsurface flow wetland system for preventing perforated pipes and fillers from being blocked Download PDF

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Publication number
CN209872521U
CN209872521U CN201821844470.6U CN201821844470U CN209872521U CN 209872521 U CN209872521 U CN 209872521U CN 201821844470 U CN201821844470 U CN 201821844470U CN 209872521 U CN209872521 U CN 209872521U
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layer
pipe
water
fillers
wetland system
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CN201821844470.6U
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杨利
郭美庆
卫芷
时虎
王瑞
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China Shanxi Sijian Group Co Ltd
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China Shanxi Sijian Group Co Ltd
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Abstract

The utility model belongs to the field of artificial functional wetlands, and provides a vertical subsurface flow wetland system for preventing perforated pipes and filler from being blocked in order to solve the problem that the subsurface flow wetland system is easy to block, which comprises a rammed plain soil layer, a fine sand protective layer, a composite geomembrane and a filler layer which are arranged from bottom to top, wherein two sides of the four-layer structure are blocked by vertically arranged concrete pool walls, and the concrete pool walls and the top of the filler layer are provided with reinforced microphone pads; be equipped with the water-feeding pipe and the collector pipe that the axis is parallel to each other in the packing layer, the water-feeding pipe top is located to the collector pipe, and the both ends of water-feeding pipe are connected with the permeability cell that stretches out perpendicularly outside the muscle mike pad. The utility model discloses be equipped with out the water collecting pipe on the wetland surface, and at the bottom installation water distribution system that packs, its area is little, and water distribution is evenly, fully catchments, prolongs the detention time of sewage in wetland unit pond. And a better purification effect is achieved.

Description

Vertical subsurface flow wetland system for preventing perforated pipes and fillers from being blocked
Technical Field
The utility model discloses a belong to artificial function wetland field, concretely relates to prevent perpendicular undercurrent wetland system of floral tube and filler jam is applicable to the implementation of the serious regional wetland engineering of northern sand storm, can effectively prevent that the filter material from blockking up, advances, goes out water floral tube jam problem.
Background
Because of the increasingly outstanding environmental problems, the requirements for purifying polluted water bodies are increasing, and the wastewater treatment and the ecological landscape are more and more popular. This requires the use of a wetland system. The vertical subsurface flow wetland system can be used for 15 years according to the design years, but in the northern China, the moderate temperature zone continental semiarid seasonal climate has high sand carrying content in the seasonal climate and severe spring sand storm. The filter material, the water collecting and water discharging perforated pipe can be blocked by adopting the traditional vertical subsurface flow wetland system, and the filter material, the water collecting and water discharging perforated pipe even needs to be replaced within 5 years. Seriously affecting the wetland operation and purification efficiency. For this reason, it is not easy to change such a current situation.
Disclosure of Invention
The utility model discloses a solve the easy problem of blockking up of undercurrent wetland system, and then provide a vertical undercurrent wetland system who prevents floral tube and filler jam.
The utility model adopts the following technical scheme:
a vertical subsurface flow wetland system for preventing perforated pipes and fillers from being blocked comprises a four-layer structure of a rammed plain soil layer, a fine sand protective layer, a composite geomembrane and a filler layer from bottom to top, wherein two sides of the four-layer structure are blocked by vertically arranged concrete pool walls, and reinforced microphone pads are arranged at the tops of the concrete pool walls and the filler layer; be equipped with the water-feeding pipe and the collector pipe that the axis is parallel to each other in the packing layer, the water-feeding pipe top is located to the collector pipe, and the both ends of water-feeding pipe are connected with the permeability cell that stretches out perpendicularly outside the muscle mike pad.
The water supply pipe is of a channel steel structure with an upward opening, the water collecting pipe is a horizontal pipe, a plurality of water inlet/outlet holes are uniformly distributed on the pipe wall of the water supply pipe and the pipe wall of the water collecting pipe respectively, geotechnical cloth wraps the outer walls of the water supply pipe and the water collecting pipe respectively, and a blind ditch formed by coarse sand is arranged on the periphery of the geotechnical cloth.
The particle size of coarse sand adopted by the blind ditch is not less than phi 30 mm.
The packing layer comprises an upper gravel layer, a professional packing layer and a lower gravel layer, the water supply pipe is arranged in the lower gravel layer, and the water collecting pipe is arranged in the upper gravel layer; the particle size of the upper crushed stone layer is phi 20-30mm, and the particle size of the lower crushed stone layer is phi 5-15 mm.
The thickness of the rammed plain soil layer is not more than 250mm, and the soil filling particles are not more than 5 mm.
The diameter of the water inlet/outlet hole is phi 10 mm.
The utility model discloses following beneficial effect has:
(1) the utility model discloses add patent medium layer (rice huller basketry and batching: remove COD fungus 30g per square meter, nitrobacteria 30g per square meter, denitrificate fungus 30g per square meter and slow release carbon element) its mechanism of action including absorption, delay, filtration, redox, denitrogenation, deposit, microbial decomposition, conversion at the wetland packing layer. Can effectively reduce the occurrence of the blockage of the floral tube and the filling of the floccules.
(2) The utility model discloses be equipped with out the water collecting pipe on the wetland surface, and at the bottom installation water distribution system that packs, its area is little, and water distribution is evenly, fully catchments, prolongs the detention time of sewage in wetland unit pond. And a better purification effect is achieved.
(3) The bottom of the filler of the wetland system is provided with a water distribution system, the surface of the filler is provided with a water outlet pipe (water supply pipe), and water flows run from bottom to top under pressure, so that the influence on the public environment of the wetland caused by the diffusion of the peculiar smell of sewage into the air can be reduced. But also is more beneficial to the photosynthesis of wetland plants.
(4) The surface of the wetland filter material is retained with dust carried by wind sand on the surface by covering the reinforced microphone pad, so that the filter material is more breathable and sanitary, is beneficial to plants to absorb water and nutrients, and accelerates the growth of plant roots.
(5) The wetland system can adapt to the climatic characteristics of great sand storm in northern areas, and can prevent dust from blocking filter materials and water outlets of floral tubes. Not only prolongs the filter material replacement period of the wetland system, but also prolongs the operation life of the wetland and saves the cost and the operation cost.
Drawings
Fig. 1 is a schematic view of the wetland system of the utility model;
FIGS. 2 and 3 are front and side views of the structure of the outlet and inlet perforated pipes;
in the figure: 1-wetland aquatic plants, 2-reinforcement microphone pads, 3-concrete pool walls, 4-rammed plain soil layers, 5-fine sand protective layers, 6-composite geomembranes, 7-water supply pipes, 8-packing layers, 9-water collecting pipes and 10-ventilating pipes;
7-1 water inlet/outlet hole, 7-2 geotextile, 7-3 plug and 7-4 blind ditch.
Detailed Description
The vertical subsurface flow wetland system for preventing the blockage of the perforated pipes and the fillers as shown in fig. 1 comprises four-layer structures of a rammed plain soil layer 4, a fine sand protective layer 5, a composite geomembrane 6 and a filler layer 8 from top to bottom, wherein two sides of the four-layer structure are blocked by vertically arranged concrete pool walls 3, and reinforced microphone pads 2 are arranged at the tops of the concrete pool walls 3 and the filler layer 8; a water supply pipe 7 and a water collection pipe 9 with axes parallel to each other are arranged in the packing layer 8, the water collection pipe 9 is arranged above the water supply pipe 7, and two ends of the water supply pipe 7 are connected with a vent pipe 10 which vertically extends out of the reinforced microphone pad 2.
The system comprises the following specific construction steps:
1 site cleaning
Before cleaning the foundation, accurately paying off according to the designed section and determining the foundation cleaning range. The boundary of the wetland base surface cleaning range is 2m outside the design base surface edge. The tree roots, weeds, silt, garbage, sundries and the like are completely removed in the base cleaning range, the thickness of the base cleaning range is not less than 300mm, and the root hairs of the saprophytic soil plants must be cleaned. The plough layer with the depth of 0.3-0.5m on the surface layer in the engineering field is required to be piled up according to the position appointed by the construction procedure for greening in future.
2 treatment of the ground
Cleaning foundation → checking and accepting foundation trench → binding of reinforcing steel bars of pool wall foundation → erecting of template of pool wall foundation → pouring of concrete of pool wall foundation → binding of reinforcing steel bars of pool wall → erecting of template of pool wall → pouring and forming of concrete of pool wall.
3 ramming of plain soil
The soil which is not doped with other impurities in the natural deposited soil layer has fine and uniform density and certain viscosity, and is compacted layer by layer to form a compacted plain soil layer. Wherein the maximum particle size of the filling particles is not more than 5mm, the virtual paving thickness of the plain soil is not more than 250mm, and the plain soil is compacted by one compaction and half compaction; the jumping racking width is preferably 100mm, and the tamping thickness is not more than one step (namely 200 mm); sampling and testing the dry volume weight of each step of soil according to the standard, and laying the earthwork of the last step in a virtual way after the dry volume weight of the next step is qualified.
4 construction of sand cushion
The fine sand protective layer adopts a construction method combining manual and mechanical laying. And carrying out manual matching leveling by adopting a backhoe. The thickness of the sand cushion layer must be strictly controlled, and the elevation and the thickness meeting the design requirements are guaranteed. During the laying process, the sundries in the sand cushion layer are required to be cleaned at any time, and the sand cushion layer is manually leveled.
5 impermeable film laying
The impermeable membrane of the composite geomembrane layer is paved by two parts, namely bottom pavement and vertical pavement. Horizontally rolling and paving along the axis direction of the bottom surface. And after the foundation is qualified by inspection, the vertical face is paved from one end of the unit to the other end of the unit in a rolling way, and the vertical face is connected with the composite geomembrane on the bottom face in a T-shaped manner. The paving should be carried out in dry and warm weather, for the convenience of splicing, prevent stress concentration, prevent that the prevention of seepage membrane is laid and adopt the wave mode of laxing, and the surplus degree is about 5%, in time draws level after the exhibition is opened, does not have protruding fold, and constructor should wear flat cloth shoes or flexible glue shoes, and the nail shoes of prohibiting to avoid trampling the geomembrane, if the prevention of seepage membrane damage is discover during the construction, should in time repair. The welding is carried out by a hot melting welding method.
6 water supply and water collection pipeline laying
The wetland pipeline water collection is a PE pipe, and the water distribution pipe is a PVC pipe. And the qualified product can be used after being retested during entering. The dirt and mud at the joint of the main pipe end and the branch pipe end can be used only after being cleaned, and because the wetland engineering pipeline water collecting pipe and the emptying pipe are perforated by manufacturers according to the design drawing requirements, the hole position and the hole diameter must meet the design requirements. After the interior of the joint and the pipe end are cleaned by using benzene essence or dry cloth, a proper amount of adhesive is coated on the interior of the joint and the pipe end, when the solvent is volatilized (about 5 seconds) and the adhesiveness is enhanced, the male pipe or the female pipe is forcibly inserted to uniformly distribute the adhesive in a rotating way and keep the adhesive moving for about 30 seconds, and water can be supplied after three hours. The periphery of the water supply and water collection pipe with the holes is wrapped with geotextile, and the seam of the geotextile is welded by professional personnel to ensure tightness.
7 construction of packing layer
During the backfill construction of the filler, after the bottom layer is qualified, the filler can be backfilled when the elevation reaches the design requirement, the wetland filler is laid for three layers, the lower layer is broken stone (the grain diameter of the lower broken stone layer is 20-30 mm), the upper layer is broken stone (the grain diameter of the upper broken stone layer is 5-15 mm), and the middle layer is a special filler (the rice basketry and the bacteria removing ingredient which is COD bacteria, nitrobacteria, denitrifying bacteria and slow-release carbon elements). Lay the water-collecting pipe in upper packing layer (last metalling) and lay the feed pipe in lower floor's packing layer (lower metalling), the peripheral adoption great granule filler of pipeline sets up and forms coarse sand blind ditch, reinforcing cloth and collection water effect. When the filling construction is carried out, the construction is carried out from the periphery to the inside, materials are transported to the right place by a machine, the artificial laying is carried out, the thickness of each layer is controlled within a design range, and mechanical vehicles and the like are strictly forbidden to enter the wetland after the filling is finished. The backfill surface is smooth, the filling is uniformly paved, and after each layer of paving is finished, the elevation and the filling thickness meet the requirements of a design drawing.
8 reinforced microphone pad construction
The reinforced microphone pad can be made into a semi-finished product in an industrial production mode according to the design intention, and the reinforced microphone pad is assembled and shaped on a construction site according to a design drawing. The combined type product is formed by combining the geotechnical material and the green grid, and has the advantages of the geotechnical material and the green grid. The geotechnical material is polypropylene material, and the green grid steel wire is usually 10% aluminum-zinc alloy plated steel wire with good corrosion resistance.
9 wetland planting of plants
Plant planting is an important part in greening engineering, and the quality of construction quality directly influences the attractiveness of the environment and the greening effect. Therefore, the wetland plant planting is well done, the water body environment is greatly improved, the water body ecosystem is restored, the water body meets the ornamental water quality requirement, and the design intention is reached.
The fillers commonly applied to the artificial wetland at present comprise gravel, zeolite, coarse sand, coal ash and the like, and are only common and single filtering anti-blocking systems. The wetland system of the utility model is filtered in multiple layers, the surface of the filter material is covered with the reinforced microphone pad to retain dust carried by wind and sand on the surface, and the filler layer is a gravel layer from bottom to top in sequence, and the particle diameter is 20-30 mm; a special packing layer, namely basketry and COD (chemical oxygen demand) bacteria, nitrobacteria and denitrifying bacteria removal and carbon element slow release; a crushed stone layer with the particle diameter of 5-15 mm. The anti-blocking of wetland is optimized. The special filling rice basketry rock has good filtering performance, strong adsorption capacity and low construction cost. The ten-river wetland in the same city has already been successful. The sewage treatment of the wetland system is improved and enhanced to a certain extent by the rice basketry, so that the anti-blocking effect is enhanced, and the greening and environmental protection of vegetation are enhanced.

Claims (6)

1. A vertical subsurface flow wetland system for preventing perforated pipes and fillers from being blocked is characterized by comprising four-layer structures including a rammed plain soil layer (4), a fine sand protective layer (5), a composite geomembrane (6) and a filler layer (8) from bottom to top, wherein two sides of the four-layer structure are blocked by vertically arranged concrete pool walls (3), and reinforced microphone pads (2) are arranged at the tops of the concrete pool walls (3) and the filler layer (8); a water supply pipe (7) and a water collection pipe (9) with mutually parallel axes are arranged in the packing layer (8), the water collection pipe (9) is arranged above the water supply pipe (7), and two ends of the water supply pipe (7) are connected with a ventilation pipe (10) which vertically extends out of the reinforced microphone pad (2).
2. The vertical subsurface wetland system capable of preventing the blockage of the perforated pipes and the fillers as claimed in claim 1, wherein the water supply pipe (7) is of a channel steel type structure with an upward opening, the water collection pipe (9) is a horizontal pipe, a plurality of water inlet/outlet holes (7-1) are uniformly distributed on the pipe walls of the water supply pipe (7) and the water collection pipe (9), the outer walls of the water supply pipe (7) and the water collection pipe (9) are respectively wrapped with geotextile (7-2), and blind ditches (7-4) formed by coarse sand are arranged on the periphery of the geotextile (7-2).
3. The vertical subsurface wetland system for preventing the blockage of the perforated pipes and the fillers as claimed in claim 2, wherein the particle size of the coarse sand adopted by the blind ditches (7-4) is not less than phi 30 mm.
4. The vertical subsurface wetland system for preventing the blockage of the perforated pipes and the fillers according to claim 3, wherein the filler layer (8) comprises a three-layer structure of an upper gravel layer, a professional filler layer and a lower gravel layer, the water supply pipe (7) is arranged in the lower gravel layer, and the water collection pipe (9) is arranged in the upper gravel layer; the particle size of the upper crushed stone layer is phi 20-30mm, and the particle size of the lower crushed stone layer is phi 5-15 mm.
5. The vertical subsurface wetland system for preventing the blockage of the perforated pipes and the fillers as claimed in claim 4, wherein the thickness of the rammed vegetable soil layer (4) is not more than 250mm, and the thickness of the filling particles is not more than 5 mm.
6. The vertical subsurface wetland system for preventing the blockage of the perforated pipes and the fillers as claimed in claim 5, wherein the diameter of the water inlet/outlet hole (7-1) is phi 10 mm.
CN201821844470.6U 2018-11-09 2018-11-09 Vertical subsurface flow wetland system for preventing perforated pipes and fillers from being blocked Active CN209872521U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112093904A (en) * 2020-08-31 2020-12-18 安徽东方风景建设有限公司 Subsurface flow wetland construction method
CN112850909A (en) * 2021-03-01 2021-05-28 北京京水建设集团有限公司 Constructed wetland filler construction method
CN113213643A (en) * 2021-04-14 2021-08-06 龚天付 Rice huller basketry and preparation method and application thereof
CN114772739A (en) * 2022-04-26 2022-07-22 河南省水利勘测设计研究有限公司 Method for improving river water quality and restoring ecology of beach land
CN114906985A (en) * 2022-05-11 2022-08-16 云南农业大学 Efficient denitrification and effective blockage prevention biological retention system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112093904A (en) * 2020-08-31 2020-12-18 安徽东方风景建设有限公司 Subsurface flow wetland construction method
CN112850909A (en) * 2021-03-01 2021-05-28 北京京水建设集团有限公司 Constructed wetland filler construction method
CN113213643A (en) * 2021-04-14 2021-08-06 龚天付 Rice huller basketry and preparation method and application thereof
CN114772739A (en) * 2022-04-26 2022-07-22 河南省水利勘测设计研究有限公司 Method for improving river water quality and restoring ecology of beach land
CN114906985A (en) * 2022-05-11 2022-08-16 云南农业大学 Efficient denitrification and effective blockage prevention biological retention system

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