CN211285511U - Multi-stage ecological landscape overflow weir structure - Google Patents
Multi-stage ecological landscape overflow weir structure Download PDFInfo
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- CN211285511U CN211285511U CN201922196295.5U CN201922196295U CN211285511U CN 211285511 U CN211285511 U CN 211285511U CN 201922196295 U CN201922196295 U CN 201922196295U CN 211285511 U CN211285511 U CN 211285511U
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Abstract
The utility model discloses a multi-stage ecological landscape overflow weir structure, which comprises a plurality of stages of overflow weirs which are sequentially connected from upstream to downstream, wherein the weir top structure of each stage of overflow weir is in differential triangular alternate arrangement; an imitated natural fishway is arranged between the adjacent overflow weirs, the imitated natural fishway is a channel arranged along the water flow direction, the upper port of the channel is connected with the weir top of the upper overflow weir, and the lower port of the channel extends to the bottom of an overflow pool of the lower overflow weir; and the bottom protection of the overflow water tank of each stage of overflow weir is a geotextile layer, a lead wire gabion layer and a planting soil layer composite structure which are sequentially superposed from bottom to top. The utility model discloses a differential type triangle-shaped arranges in turn for rivers fully combine with the air at the whereabouts in-process, have increased river aeration performance, have improved the content of aquatic dissolved oxygen, provide good ecological environment for animal, plant and microorganism in the overflow pond, created the color that is rich in the life.
Description
Technical Field
The utility model relates to an ecological overflow weir in city especially relates to multistage ecological landscape overflow weir structure.
Background
Along with the construction of urban water ecological civilization, improving the waterfront ecological environment level is the development aim of the current river comprehensive treatment. According to the requirements of urban ecological landscape, the overflow weir is one of the common impounded water structures. Various low water head overflow weirs built in consideration of landscape requirements appear in recent years, namely, a certain degree of water landscape effect is achieved at a local river section on the upstream of the overflow weir by stopping up the water level; the overflow weirs are basically all of reinforced concrete or grouted stone hardened structures, are large in size and single in line type, only consider basic functions of flood control, water storage and irrigation, and do not consider landscape effects of the overflow weirs and requirements of river ecological environments. The existing defects are mainly expressed as follows: 1. the weir crest of the overflow weir has simple structure and simple lines, the aeration of the overflow water body is insufficient, the aeration performance of the river is weaker, and the content of dissolved oxygen in water is lower; 2. the overflow weir has single plane shape, hardness and poor self-landscape effect; 3. the longitudinal connectivity of the river is cut off, so that the channel of free migration of biological species such as fish and the like is cut off, the survival of the original organisms is affected and even can not survive, the diversity of the organisms in the water is reduced, and even some rare species are endangered to be extinct.
Disclosure of Invention
An object of the utility model is to provide a multistage ecological landscape overflow weir structure realizes the transformation from engineering water conservancy to ecological water conservancy.
In order to achieve the above purpose, the utility model adopts the following technical proposal:
the multi-stage ecological landscape overflow weir structure comprises multi-stage overflow weirs which are sequentially connected from upstream to downstream, and the weir top structure of each stage of the overflow weir is in differential triangular alternate arrangement; an imitated natural fishway is arranged between the adjacent overflow weirs, the imitated natural fishway is a channel arranged along the water flow direction, the upper port of the channel is connected with the weir top of the upper overflow weir, and the lower port of the channel extends to the bottom of an overflow pool of the lower overflow weir; and the bottom protection of the overflow water tank of each stage of overflow weir is a geotextile layer, a lead wire gabion layer and a planting soil layer composite structure which are sequentially superposed from bottom to top.
Broken stones are laid in the channel along the water flow direction, and floating stones are arranged on the broken stone structure; each level of the overflow weir is provided with aquatic plants in the overflow water tank.
Each level of the overflow weir is provided with landscape stones in the overflow tank.
The thickness of the lead wire gabion layer is 0.5m, and the thickness of the planting soil layer is 0.3 m.
The plurality of the imitated natural fishways arranged between the adjacent stages of overflow weirs are staggered and arranged
The utility model discloses the advantage embodies in following aspect:
1. the invention replaces the existing single high water head weir with the multi-stage low water head overflow weir, enriches the existing single overflow weir form, and has smaller volume and convenient construction;
2. the weir crest structures of all levels of overflow weirs are alternately arranged in a differential triangular manner, so that water flow is fully combined with air in the falling process, the aeration performance of rivers is improved, the content of dissolved oxygen in water is improved, a good ecological environment is provided for animals, plants and microorganisms in an overflow water tank, and a color rich in vitality is created;
3. a plurality of fishways are alternately arranged among all levels of overflow weirs, so that a water biological migration channel is effectively communicated, broken stones are laid at the bottoms of the fishways, and floating stones are scattered on the broken stone structures, so that the rough effect of the fishways is improved, the water flow structures in the fishways are more diversified, and the ecological performance requirement of a river channel is highlighted;
4. the overflow pond bottom protection is a composite protection ecological structure of 'geotextile + lead wire gabion + planting soil', the stability of the ecological structure is improved, sporadic landscape stones and planting aquatic plants are arranged on the ecological structure, and the requirement of human landscape is met.
Drawings
Fig. 1 is a schematic view of the planar layout structure of the present invention.
Fig. 2 is a schematic sectional view taken along line a-a of fig. 1.
Fig. 3 is an enlarged schematic view of a portion I of fig. 2.
Fig. 4 is a schematic view of the cross-section structure of the natural-like fishway of the present invention.
Fig. 5 is a structural schematic diagram of the weir crest of the present invention configured as a differential triangular alternating arrangement.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the drawings, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are provided, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1-5, the multi-stage ecological landscape overflow weir structure of the present invention comprises six stages of overflow weirs 1.1, 1.2, 1.3, 1.4, 1.5, 1.6 connected in sequence from upstream to downstream, wherein the weir top structures of each stage of overflow weir are arranged in a differential triangular alternating manner; a plurality of nature-imitated fishways 2 are arranged between every two adjacent overflow weirs, and the nature-imitated fishways 2 which are adjacent up and down are arranged in a staggered mode.
The nature-imitated fishway 2 is a U-shaped channel 3 arranged along the water flow direction, the upper port of the U-shaped channel 3 is connected with the top of the upper stage overflow weir, the lower port of the U-shaped channel 3 extends to the bottom of the overflow pool 4 of the lower stage overflow weir, broken stones 5 are laid in the U-shaped channel 3 along the water flow direction, and floating stones are arranged on the broken stone structure; the bottom protection of the overflow water tank 4 of each stage of overflow weir is a composite structure of a geotextile layer 6, a lead wire gabion layer 7 and a planting soil layer 8 which are sequentially superposed from bottom to top, the thickness of the lead wire gabion layer 7 is 0.5m, and the thickness of the planting soil layer 8 is 0.3 m; aquatic plants 4.1 and landscape stones 4.2 are planted in the overflow water tank 4.
When the utility model is designed, the number, the width of the weir crest and the height of the weir body of the multi-stage overflow weir are comprehensively determined according to the normal water level difference, the overflowing capacity, the stability calculation, the construction requirement and the like of the landscape at the upper and the lower reaches of the river channel 9; the height difference of each stage of overflow weir is designed to be 0.5-0.8 m.
When the weir body is designed, according to the width and slope ratio of the river bottom 9 and the requirements of the slope of the fishway 2, the multi-stage overflow weir and the planar arrangement of the fishway 2 are carried out, and the length of each stage of overflow weir, the planar form (length and width) of each stage of overflow pool 4 and the number and slope of the fishway 2 are determined.
The minimum depth of the overflow water pool 4 is determined according to the hydraulic requirement of an overflow energy dissipater, and the overflow water pools 4 at all levels not only serve as energy dissipaters, but also serve as landscape water pools and rest pools for aquatic organisms.
Constructing each stage of overflow weir body from downstream to upstream, pouring a concrete cushion layer at the bottom, and constructing an upper overflow weir body retaining wall structure;
after the retaining walls of all levels of overflow weirs are poured, constructing a fishway 2, after the retaining wall structure of the fishway 2 is poured, arranging broken stones 5 and floating stones in an upper U-shaped channel in sequence to form a roughened ramp, then constructing an overflow water tank 4, excavating to a designed elevation, leveling, tamping, then laying a geotechnical cloth layer 6, a plumbous wire stone cage layer 7 and a planting soil layer 8 in sequence, and finally arranging scattered landscape stones 4.1 in the overflow water tank 4 and planting aquatic plants 4.2.
Claims (5)
1. The utility model provides a multistage ecological landscape overflow weir structure which characterized in that: the weir top structure of each stage of overflow weir is in differential triangular alternate arrangement; an imitated natural fishway is arranged between the adjacent overflow weirs, the imitated natural fishway is a channel arranged along the water flow direction, the upper port of the channel is connected with the weir top of the upper overflow weir, and the lower port of the channel extends to the bottom of an overflow pool of the lower overflow weir; and the bottom protection of the overflow water tank of each stage of overflow weir is a geotextile layer, a lead wire gabion layer and a planting soil layer composite structure which are sequentially superposed from bottom to top.
2. The multi-stage ecological landscape overflow weir structure of claim 1, wherein: broken stones are laid in the channel along the water flow direction, and floating stones are arranged on the broken stone structure; each level of the overflow weir is provided with aquatic plants in the overflow water tank.
3. The multi-stage ecological landscape overflow weir structure of claim 1 or 2, wherein: each level of the overflow weir is provided with landscape stones in the overflow tank.
4. The multi-stage ecological landscape overflow weir structure of claim 1 or 2, wherein: the thickness of the lead wire gabion layer is 0.5m, and the thickness of the planting soil layer is 0.3 m.
5. The multi-stage ecological landscape overflow weir structure of claim 1 or 2, wherein: the plurality of the imitated natural fishways arranged between the adjacent stages of overflow weirs are arranged in a staggered manner.
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CN110761250A (en) * | 2019-12-10 | 2020-02-07 | 河南省水利勘测设计研究有限公司 | Multi-stage ecological landscape overflow weir structure |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN110761250A (en) * | 2019-12-10 | 2020-02-07 | 河南省水利勘测设计研究有限公司 | Multi-stage ecological landscape overflow weir structure |
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