Near-natural river channel ecological buffer zone

Abstract

The utility model relates to a close-to-nature river ecological buffer zone, which comprises a plurality of ascending slopes arranged in a stepped manner and riprap structures arranged on the ascending slopes, and is technically characterized in that each riprap structure comprises a plurality of rows of ripraps arranged on the ascending slopes, every two adjacent rows of ripraps are alternately arranged, the ripraps are in ball-like shapes, cavities are formed in the ripraps, and the ripraps are arranged on the ascending slopes. Through holes communicated with the cavity are densely distributed in the surface of the riprap, the cavity is filled with nutrient soil in advance, seeds of a first plant are mixed in the nutrient soil, stand columns are fixed to the bottom of the riprap, the lower portions of the stand columns are welded into a whole through a latticed frame, and the upper semi-spherical surface of the riprap is located on the upper surface protruding out of the rising slope. And second plants are uniformly planted on the ascending slope surface in the gap positions of the ripraps. The utility model solves the problem that the stability of riprap positioning in the existing buffer strip still needs to be improved, and avoids the influence on the use effect due to position displacement under the impact of water flow.

Description

Technical Field

[0001] The utility model relates to the technical field of river buffer zones, in particular to a near-natural river ecological buffer zone. Background Art

[0002] The river ecological buffer zone is used to prevent the erosion of the river bank and prevent soil erosion. At the same time, it can also purify the river water by planting some aquatic plants.

[0003] For example, CN 217298792U discloses a near-natural river ecological buffer zone, which includes a slope foot, a slope surface and a slope top. The slope foot adopts a wire gabion mesh protection structure, and the slope surface includes a flooded area, a variable area and a frequently exposed area. The flooded area adopts a gabion mesh cushion protection structure, the variable area adopts a cutting-riprap protection structure, the frequently exposed area adopts a shrub cushion protection structure, and the slope top adopts a combined protection structure of an ecological interception belt + sunken green space + plant hedge. The river ecological buffer zone adopts a wire gabion mesh protection structure at the slope foot to effectively prevent soil erosion and avoid shoreline erosion. The slope surface adopts a gabion mesh cushion, cutting-riprap, and shrub protection methods according to different areas. The slope top adopts a combination of an ecological interception belt + sunken green space + plant hedge, which increases the biodiversity of the riverbank and effectively and fully purifies the water body. However, there are still the following problems: the positioning stability of the riprap in the combined cutting-riprap measures still needs to be improved, especially in the early stages of construction. Utility Model Content

[0004] The purpose of the utility model is to provide a near-natural river ecological buffer zone with a reasonable structure and reliable use, to solve the problem that the stability of riprap positioning in the existing buffer zone still needs to be improved, and to avoid position movement under the impact of water flow, which affects the use effect.

[0005] The technical solution of the utility model is:

[0006] A near-natural river ecological buffer zone comprises a plurality of ascending slopes arranged in a stepped manner and a riprap structure arranged on the ascending slopes, the technical key points of which are as follows: the riprap structure comprises a plurality of rows of riprap arranged on the ascending slopes, two adjacent rows of riprap are arranged alternately, the riprap is spherical and has cavities therein, the surface of the riprap is densely covered with through holes connected to the cavities, the cavities are pre-filled with nutrient soil, the nutrient soil is mixed with seeds of a first plant, columns are fixed to the bottom of the riprap, the lower parts of the columns are welded together by a grid-like frame, the upper hemispherical surface of the riprap is located protruding from the upper surface of the ascending slope, and the ascending slope is evenly planted with a second plant at the gap positions of the ripraps.

[0007] In the above-mentioned near-natural river ecological buffer zone, the rising slope is composed of a soil layer, a geotextile, a fine sand layer and a gravel layer from top to bottom.

[0008] In the above-mentioned near-natural river ecological buffer zone, the columns are hollow columns.

[0009] In the above-mentioned near-natural river ecological buffer zone, a retaining wall is provided between two adjacent rising slopes.

[0010] The beneficial effects of the utility model are:

[0011] 1. In the early stage of construction, the grid-like frame uses columns to position the riprap, so it has good positioning when resisting the impact of water flow in the early stage. The water flow is diverted by the riprap to alleviate the impact on the rising slope.

[0012] 2. After a period of time, the seeds of the first plant in the hollow structure of the riprap quickly take root and sprout under the promotion of the nutrient soil. Part of the roots penetrate into the soil through the through holes on the lower surface of the riprap to strengthen the positioning of the riprap, and part of the first plant also grows out through the through holes on the upper surface of the riprap, forming the first plant landscape. At the same time, the first plant also absorbs substances in the water flow to a certain extent to achieve a purification effect.

[0013] 3. The second type of plants are evenly planted in the gaps between the riprap on the ascending slope to form a second type of plant landscape. At the same time, similar to the first type of plants, they also absorb substances in the water flow to a certain extent to achieve purification.

[0014] In summary, the utility model solves the problem that the stability of the positioning of riprap in the existing buffer zone still needs to be improved, thereby avoiding position shifting under the impact of water flow and affecting the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 yes Figure 1 Top view of the .

[0017] In the figure: 1. rising slope, 2. riprap, 3. second plant, 4. first plant, 5. retaining wall, 6. grid frame, 7. soil layer, 8. geotextile, 9. fine sand layer, 10. gravel layer, 11. column, 12. through hole. DETAILED DESCRIPTION

[0018] The utility model is described in detail according to the accompanying drawings of the specification.

[0019] like Figure 1 , Figure 2 As shown, the near-natural river ecological buffer zone includes a plurality of ascending slopes 1 arranged in a stepped manner and a riprap structure arranged on the ascending slopes 1 .

[0020] The riprap structure includes multiple rows of riprap 2 arranged on the ascending slope 1, and two adjacent rows of riprap 2 are arranged alternately. The gap between two adjacent riprap 2 in the same row of riprap 2 is smaller than the diameter of the riprap 2.

[0021] The riprap 2 is spherical and has a cavity therein. The surface of the riprap 2 is densely covered with through holes 12 connected to the cavity. The cavity is pre-filled with nutrient soil, and the nutrient soil is mixed with seeds of the first plant 4. A column 11 is fixed to the bottom of the riprap 2. The lower part of each column 11 is welded together by a grid-like frame 6. The upper hemispherical surface of the riprap 2 is located protruding from the upper surface of the ascending slope 1. The ascending slope 1 is evenly planted with the second plant 3 at the gap position of each riprap 2.

[0022] In this embodiment, the ascending slope 1 is composed of a soil layer 7, a geotextile 8, a fine sand layer 9 and a gravel layer 10 from top to bottom. The columns 11 are hollow columns. A retaining wall 5 is provided between two adjacent ascending slopes 1.

[0023] Working principle:

[0024] 1. First, a grid-shaped frame 6, columns 11 and riprap 2 are arranged at the soil layer 7, and then the soil layer 7 is filled, and the upper hemispherical structure of the riprap 2 is exposed on the surface of the soil layer 7. When water flows, it is diverted by multiple rows of riprap 2 to avoid the soil on the rising slope 1 being impacted and lost.

[0025] 2. After a period of time, the seeds of the first plant 4 in the hollow structure of the riprap 2 quickly take root and sprout under the promotion of the nutrient soil. A part of the root system penetrates into the soil through the through holes 12 on the lower surface of the riprap 2 to strengthen the positioning of the riprap 2, and part of the first plant 4 also grows out through the through holes on the upper surface of the riprap 2, forming a first plant landscape. At the same time, the first plant 4 also absorbs substances in the water flow to a certain extent, achieving water purification. The second plant 3 planted on the rising slope 1 forms a second plant landscape, and also absorbs substances in the water flow to a certain extent, achieving water purification. The two plants complement each other to form a buffer purification zone close to nature.

[0026] The above is a detailed description of the embodiments of the utility model, but the above contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of the invention of the utility model should still fall within the scope of this patent.

Claims

1. A near-natural river ecological buffer zone, comprising a plurality of ascending slopes arranged in a stepped manner and a riprap structure arranged on the ascending slopes, characterized in that: The riprap structure includes multiple rows of riprap arranged on the ascending slope, with adjacent rows of riprap arranged alternately. The riprap is spherical and has a cavity therein. The surface of the riprap is densely covered with through holes connected to the cavity. The cavity is pre-filled with nutrient soil, and the nutrient soil is mixed with seeds of a first plant. A column is fixed to the bottom of the riprap, and the lower part of each column is welded together using a grid-like frame. The upper hemispherical surface of the riprap is located protruding from the upper surface of the ascending slope, and the ascending slope is evenly planted with the second plant at the gap position of each riprap.

2. The near-natural river ecological buffer zone according to claim 1 is characterized by: The ascending slope surface comprises a soil layer, a geotextile, a fine sand layer and a gravel layer from top to bottom.

3. The near-natural river ecological buffer zone according to claim 1 is characterized by: The column is a hollow column.

4. The near-natural river ecological buffer zone according to claim 1 is characterized by: A retaining wall is arranged between two adjacent ascending slopes.

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