River ecological slope

Abstract

The utility model relates to a riverway ecological slope which comprises a horizontal section and an inclined section connected with the river bottom, the horizontal section is provided with a water collecting ditch, and the length direction of the water collecting ditch is consistent with the length direction of a riverway. A plurality of uniformly distributed overflow ports are formed in the top of the side wall, facing the inclined section, of the water collecting ditch; the horizontal section comprises a first plant layer, a first soil layer and a first water filtering particle layer which are sequentially arranged from top to bottom, the inclined section comprises a second plant layer, a second soil layer and a second water filtering particle layer which are sequentially arranged from top to bottom, and the first soil layer is connected with the second soil layer; the first water filtering particle layer is connected with the second water filtering particle layer, the lower ends of the second plant layer, the second soil layer and the second water filtering particle layer extend to the normal water level of the river, and the overflow port is located in the first water filtering particle layer. According to the device, the scouring acting force of rainwater to the river bottom can be reduced, meanwhile, the rainwater is filtered, and solid impurities entering the river are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of side slope, especially a river ecological side slope. BACKGROUND

[0002] In order to prevent river side slope water and soil loss, promote side slope afforestation, usually plant on the side slope to realize the ecological reconstruction of side slope, such as the utility model discloses the ecological river revetment of application No. CN201620349816. When it rains heavily, usually rainwater is concentrated and discharged into the river through the drainage ditch, and the concentrated discharge causes a greater scouring force on the river bottom at the connection between the drainage ditch and the river, affecting the service life of the river bottom. In addition, rainwater contains a lot of solid impurities, which can easily cause the river to be turbid, which is not conducive to the survival of aquatic organisms. Currently, the conventional river side slope does not have the function of filtering rainwater. CONTENT OF THE UTILITY MODEL

[0003] The utility model solves the technical problem to provide a river ecological side slope, which can reduce the scouring force of rainwater on the river bottom and filter rainwater to reduce solid impurities entering the river.

[0004] To solve the above problems, the utility model adopts the technical scheme of a river ecological side slope, which comprises a horizontal section and an inclined section connected to the river bottom,

[0005] The horizontal section is provided with a water collecting ditch, and the length direction of the water collecting ditch is consistent with the length direction of the river; a plurality of overflow ports are arranged on the top of the side wall of the water collecting ditch towards the inclined section; the horizontal section comprises a first plant layer, a first soil layer and a first water filtering particle layer arranged in sequence from top to bottom, the inclined section comprises a second plant layer, a second soil layer and a second water filtering particle layer arranged in sequence from top to bottom, the first soil layer is connected to the second soil layer, and the first water filtering particle layer is connected to the second water filtering particle layer; the lower end of the second plant layer, the second soil layer and the second water filtering particle layer extends to the river normal water level, and the overflow port is located in the first water filtering particle layer.

[0006] Further, the first water filtering particle layer and the second water filtering particle layer each comprise a first particle layer, a second particle layer and a third particle layer arranged in sequence from bottom to top, and the particle size of the first particle layer, the second particle layer and the third particle layer decreases in turn.

[0007] Further, the first particle layer, the second particle layer and the third particle layer are pebble layer, ceramsite layer and fine sand layer respectively.

[0008] Further, a vertical water permeable retaining wall is arranged at the river normal water level.

[0009] Further, the water permeable retaining wall comprises a plurality of wooden piles driven into the inclined section.

[0010] Further, a vertical partition is arranged in the water collecting groove, the lower end of the partition is connected with the bottom wall of the water collecting groove, and the upper end of the partition is higher than the overflow port.

[0011] Further, a grating cover is arranged at the top of the water collecting groove.

[0012] Further, a waterproof layer is arranged below the second water filtering particle layer.

[0013] Further, a plurality of vertical support nets are embedded in the waterproof layer, and the upper end of the support net penetrates the second water filtering particle layer.

[0014] Further, a plurality of water inlets are connected with the top of the side wall of the water collecting groove away from the inclined section, and a detachable filtering basket is arranged at the outlet of the water inlet.

[0015] The beneficial effects of the utility model are as follows: when it rains, rainwater enters the water collecting groove, then enters the first water filtering particle layer through each overflow port, then flows in the first water filtering particle layer to the second water filtering particle layer, and then flows downward along the second water filtering particle layer to the river channel. The first water filtering particle layer and the second water filtering particle layer can filter rainwater and intercept solid impurities in the rainwater, thereby preventing a large amount of solid impurities from entering the river water and causing the river water to be turbid.

[0016] In addition, rainwater enters the first water filtering particle layer through a plurality of overflow ports, then dispersively flows downward in the first water filtering particle layer and the second water filtering particle layer, improves the rainwater filtering effect, and greatly reduces the amount of rainwater entering the river channel per unit area, thereby avoiding strong scouring of the river bottom when rainwater is discharged.

[0017] In addition, the first plant layer and the second plant layer can be planted to green the side slope. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a sectional view of the side slope of the utility model;

[0019] Figure 2 is Figure 1 an enlarged schematic view of part A in the figure;

[0020] Fig. 1 is a horizontal section; 2 is a river bottom; 3 is an inclined section; 4 is a water collecting groove; 5 is an overflow port; 6 is a first plant layer; 7 is a first soil layer; 8 is a first water filtering particle layer; 81 is a first particle layer; 82 is a second particle layer; 83 is a third particle layer; 9 is a second plant layer; 10 is a second soil layer; 11 is a second water filtering particle layer; 12 is a water permeable retaining wall; 13 is a partition; 14 is a grating cover; 15 is a waterproof layer; 16 is a support net; 17 is a water inlet; and 18 is a filtering basket. DETAILED DESCRIPTION

[0021] The utility model is further illustrated below in connection with the drawings and examples.

[0022] The river ecological slope of the utility model, as shown in the figure, comprises a horizontal section 1 and an inclined section 3 connected with the river bottom 2. Figure 1 The horizontal section 1 is provided with a water collecting ditch 4, the length direction of the water collecting ditch 4 is consistent with the length direction of the river; the side wall top of the water collecting ditch 4 towards the inclined section 3 is provided with a plurality of evenly distributed overflow ports 5; the horizontal section 1 comprises a first plant layer 6, a first soil layer 7 and a first water filtering particle layer 8 arranged in sequence from top to bottom, the inclined section 3 comprises a second plant layer 9, a second soil layer 10 and a second water filtering particle layer 11 arranged in sequence from top to bottom, the first soil layer 7 is connected with the second soil layer 10, the first water filtering particle layer 8 is connected with the second water filtering particle layer 11, the lower end of the second plant layer 9, the second soil layer 10 and the second water filtering particle layer 11 extends to the river normal water level, and the overflow port 5 is located in the first water filtering particle layer 8.

[0023] The water collecting ditch 4 is used for collecting rainwater, and can adopt a concrete ditch, the section of the inner cavity of which is rectangular. During construction, a ditch is excavated on the ground of the horizontal section 1, then the prefabricated water collecting ditch 4 is loaded into the ditch, or the concrete is directly poured in the ditch to form the water collecting ditch 4. The upper end of the water collecting ditch 4 is flush with the top of the first soil layer 7, the height of the overflow port 5 is the same as the height of the first water filtering particle layer 8, in order to prevent the particles of the first water filtering particle layer 8 from entering the water collecting ditch 4 through the overflow port 5, a steel mesh can be arranged in the water collecting ditch 4. The first plant layer 6 and the second plant layer 9 play the role of greening the slope, and can adopt conventional greening plants. The first soil layer 7 and the second soil layer 10 are respectively used for providing nutrient substances to the first plant layer 6 and the second plant layer 9, and can adopt conventional soil or nutrient soil, the thickness of the first soil layer 7 and the second soil layer 10 is about 30cm. The lower end of the second plant layer 9, the second soil layer 10 and the second water filtering particle layer 11 extends to the river normal water level, avoiding the soil loss caused by the long-time immersion of the second soil layer 10 in the river water.

[0024] The water collecting ditch 4 is used for collecting rainwater, and can adopt a concrete ditch, the section of the inner cavity of which is rectangular. During construction, a ditch is excavated on the ground of the horizontal section 1, then the prefabricated water collecting ditch 4 is loaded into the ditch, or the concrete is directly poured in the ditch to form the water collecting ditch 4. The upper end of the water collecting ditch 4 is flush with the top of the first soil layer 7, the height of the overflow port 5 is the same as the height of the first water filtering particle layer 8, in order to prevent the particles of the first water filtering particle layer 8 from entering the water collecting ditch 4 through the overflow port 5, a steel mesh can be arranged in the water collecting ditch 4. The first plant layer 6 and the second plant layer 9 play the role of greening the slope, and can adopt conventional greening plants. The first soil layer 7 and the second soil layer 10 are respectively used for providing nutrient substances to the first plant layer 6 and the second plant layer 9, and can adopt conventional soil or nutrient soil, the thickness of the first soil layer 7 and the second soil layer 10 is about 30cm. The lower end of the second plant layer 9, the second soil layer 10 and the second water filtering particle layer 11 extends to the river normal water level, avoiding the soil loss caused by the long-time immersion of the second soil layer 10 in the river water.

[0025] After the rainwater enters the collecting ditch 4, it overflows from each overflow port 5 and enters the first water filtering particle layer 8. Since the rainwater enters the first water filtering particle layer 8 through multiple overflow ports 5, the amount of rainwater overflowing from each overflow port 5 is small, so that the rainwater is dispersed into the first water filtering particle layer 8, and there are a large number of gaps in the first water filtering particle layer 8, so that the rainwater can penetrate the first water filtering particle layer 8 and enter the second water filtering particle layer 11, and there are also a large number of gaps in the second water filtering particle layer 11, so that the rainwater can flow downward in the second water filtering particle layer 11 to the river channel. After the rainwater enters the second water filtering particle layer 11, it is gradually dispersed into the entire second water filtering particle layer 11, so as to be dispersedly discharged into the river channel, and the rainwater discharge amount per unit area of the river channel is small. The rainwater discharge mode is changed from the traditional centralized discharge to the dispersed discharge, so that the river bottom 2 is not scoured, and the service life of the river bottom 2 can be ensured. In addition, the first water filtering particle layer 8 and the second water filtering particle layer 11 have filtering functions, so that the solid impurities in the rainwater are gradually filtered out, the content of the solid impurities in the rainwater is reduced, and the pollution degree of the river can be reduced.

[0026] The first water filtering particle layer 8 and the second water filtering particle layer 11 each include a first particle layer 81, a second particle layer 82 and a third particle layer 83 arranged in sequence from bottom to top, and the particle sizes of the first particle layer 81, the second particle layer 82 and the third particle layer 83 are gradually reduced. The first particle layer 81 has the largest particle size and the largest internal pore, and plays a main filtering and drainage role; the second particle layer 82 has a smaller particle size and is used for auxiliary filtering and drainage; the third particle layer 83 has a smaller particle size and a smaller internal pore, and is used for supporting soil and preventing the soil from flowing into the second particle layer 82 and the third particle layer 83. A layer of water permeable geotextile can be arranged between the first water filtering particle layer 8 and the second water filtering particle layer 11 and between the second particle layer 82 and the third particle layer 83, and plays an isolation role. The height of the overflow port 5 is adapted to the heights of the first particle layer 81 and the second particle layer 82 and is lower than the height of the third particle layer 83, so that the rainwater discharged from the overflow port 5 can enter the first particle layer 81 and the second particle layer 82.

[0027] Specifically, the first particle layer 81, the second particle layer 82 and the third particle layer 83 are respectively a pebble layer, a ceramsite layer and a fine sand layer. The pebble layer has a particle size of 15 to 30 mm and a thickness of about 10 cm; the ceramsite layer has a particle size of 5 to 12 mm and a thickness of about 10 cm; and the fine sand layer has a particle size of 1 to 3 mm and a thickness of about 5 cm.

[0028] Since the inclined section 3 is inclined, the second water filtering particle layer 11 is easy to slide downward into the river channel, and the utility model is provided with a vertical water permeable retaining wall 12 at the normal water level of the river, which can support the second water filtering particle layer 11 and prevent the second water filtering particle layer 11 from sliding into the river channel, so as to improve the stability of the second water filtering particle layer 11.

[0029] The water-permeable retaining wall 12 can be a concrete wall or a brick wall, preferably, the water-permeable retaining wall 12 comprises a plurality of wooden piles punched into the inclined section 3, the wooden piles are more ecological and environmentally friendly, and no construction waste is generated during later maintenance. When the spacing between the wooden piles is large, a steel mesh can be arranged on the side of the wooden piles facing the second water filtering particle layer 11 for intercepting and supporting the second water filtering particle layer 11.

[0030] A vertical partition plate 13 is arranged in the water collecting groove 4, the lower end of the partition plate 13 is connected with the bottom wall of the water collecting groove 4, and the upper end of the partition plate 13 is higher than the overflow port 5. The partition plate 13 divides the inner cavity of the water collecting groove 4 into a water inlet cavity and a sedimentation cavity. After the rainwater enters the water inlet cavity, it overflows from above the partition plate 13 to the sedimentation cavity, and then enters the first water filtering particle layer 8 after preliminary sedimentation.

[0031] In order to prevent the rainwater in the second water filtering particle layer 11 from seeping into the internal soil of the slope and causing landslide, a waterproof layer 15 is arranged below the second water filtering particle layer 11, the waterproof layer 15 can be made of waterproof geotextile, preferably, a concrete layer, and the waterproof layer can also be arranged below the first water filtering particle layer 8. In order to further improve the stability of the second water filtering particle layer 11, a plurality of vertical support nets 16 are embedded in the waterproof layer 15, the support nets 16 can be made of steel mesh, and the upper end of the support net 16 penetrates the second water filtering particle layer 11. During construction, the lower end of the support net 16 is first punched into the soil layer of the slope, then the waterproof layer 15 is obtained by pouring concrete, and then the second water filtering particle layer 11 is laid on the surface of the waterproof layer 15. The support net 16 is provided with multiple rows, which can support and limit the second water filtering particle layer 11, so as to prevent the second water filtering particle layer 11 from sliding downward.

[0032] A grating cover 14 is arranged on the top of the water collecting groove 4, which can prevent common sundries such as leaves and plastic films outside from falling into the water collecting groove 4.

[0033] A plurality of water inlets 17 are connected to the top of the side wall of the water collecting groove 4 away from the inclined section 3, the water inlets 17 are arranged on the ground and used for conveying rainwater to the water collecting groove 4, and the outlet of the water inlet 17 is provided with a detachable filtering basket 18. The filtering basket 18 can preliminarily filter the rainwater to remove solid sundries with large volume, such as branches, leaves and plastic garbage. The filtering basket 18 can be detached to facilitate cleaning of the sundries in the filtering basket 18.

[0034] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A river ecological slope, comprising a horizontal section (1) and an inclined section (3) connected to the riverbed (2), characterized in that: The horizontal section (1) is provided with a water collection ditch (4), the length direction of which is consistent with the length direction of the river channel; the top of the side wall of the water collection ditch (4) facing the inclined section (3) is provided with multiple evenly distributed overflow outlets (5); the horizontal section (1) includes a first plant layer (6), a first soil layer (7) and a first filter particle layer (8) arranged sequentially from top to bottom; the inclined section (3) includes a second plant layer (9), a second soil layer (10) and a second filter particle layer (11) arranged sequentially from top to bottom; the first soil layer (7) is connected to the second soil layer (10); the first filter particle layer (8) is connected to the second filter particle layer (11); the lower ends of the second plant layer (9), the second soil layer (10) and the second filter particle layer (11) extend to the normal water level of the river; the overflow outlet (5) is located in the first filter particle layer (8).

2. The river ecological slope as described in claim 1, characterized in that: The first filter particle layer (8) and the second filter particle layer (11) both include a first particle layer (81), a second particle layer (82) and a third particle layer (83) arranged sequentially from bottom to top, and the particle size of the first particle layer (81), the second particle layer (82) and the third particle layer (83) decreases sequentially.

3. The river ecological slope as described in claim 2, characterized in that: The first particle layer (81), the second particle layer (82), and the third particle layer (83) are respectively a pebble layer, a ceramsite layer, and a fine sand layer.

4. The river ecological slope as described in claim 1, characterized in that: A vertical permeable retaining wall (12) is installed at the normal water level of the river.

5. The river ecological slope as described in claim 4, characterized in that: The permeable retaining wall (12) includes multiple wooden piles driven into the inclined section (3).

6. The river ecological slope as described in claim 1, characterized in that: A vertical partition (13) is provided inside the water collection ditch (4). The lower end of the partition (13) is connected to the bottom wall of the water collection ditch (4), and the upper end of the partition (13) is higher than the overflow port (5).

7. The river ecological slope as described in claim 1, characterized in that: The top of the water collection ditch (4) is provided with a grid cover (14).

8. The river ecological slope as described in claim 1, characterized in that: A waterproof layer (15) is provided below the second filter particle layer (11).

9. The river ecological slope as described in claim 8, characterized in that: Multiple vertical support nets (16) are embedded in the waterproof layer (15), and the upper end of the support nets (16) penetrates the second filter particle layer (11).

10. The river ecological slope as described in claim 1, characterized in that: The top of the side wall away from the inclined section (3) of the water collection ditch (4) is connected to multiple water inlet troughs (17), and the outlet of the water inlet trough (17) is provided with a detachable filter basket (18).

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