Combined ecological slope protection structure suitable for soft soil body side slope

Abstract

The utility model provides a combined ecological slope protection structure suitable for a soft soil body side slope. The combined ecological slope protection structure comprises a concrete slope protection layer, an ecological frame nest and ecological greening plants which are sequentially arranged from a slope toe to a slope top. The concrete slope protection layer is laid on the slope surface of a side slope below a riverway hydro-fluctuation area, the two ends of the concrete slope protection layer are connected with the pressing foot and the coping correspondingly, the pressing foot is laid on the slope foot in the length direction of the side slope, and the bottom of the pressing foot is supported through a pile. The coping is laid at the end, close to the slope top, of the concrete slope protection layer in the length direction of the slope. The ecological frame nest is arranged in the range of a water-level-fluctuating area of a river channel, and the bottom of the ecological frame nest is supported by piles; the ecological green plants are arranged above the water-level-fluctuating area of the river channel. The slope protection structure is arranged according to the river channel hydro-fluctuation area, the anti-scouring performance and the ecological effect of the river channel bank slope are guaranteed, and damage caused by uneven settlement of the concrete slope protection layer and damage to the ecological frame nest due to slope soil loss can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of slope protection, in particular to a combined ecological slope protection structure suitable for soft soil slopes. Background Art

[0002] In the plain areas of general river and lake basins, the soil moisture content of river bank slopes is relatively high, the shear strength of the soil is relatively weak, the slope stability is poor, and the slope soil stability is poor; and due to the frequent changes in river water levels, there are certain height ranges of fluctuation areas, and the ecological properties of the slopes are poor. Under the effects of long-term scouring of surface water and rainwater, and frequent sudden drops in water levels, serious soil and water loss is often prone to occur.

[0003] The utility model patent with the authorization announcement number CN218454380U discloses a combined slope protection structure for water level fluctuation areas. From the river bottom to the top of the river bank slope, natural soil slope, continuous wall with planted wood piles, hydrophilic platform, vertical revetment, geocell slope protection, and turf slope protection are sequentially arranged to form a slope protection structure. The slope protection structure is a combination of slope-platform-vertical wall-platform-slope, and the cross-section of the slope protection structure is a stepped structure. However, for soft soil slopes, natural soil slopes and hydrophilic platforms are prone to soil erosion and slope collapse due to long-term scouring. Utility Model Content

[0004] The purpose of the utility model is to provide a combined ecological slope protection structure suitable for soft soil slopes in view of the defects of the prior art.

[0005] The utility model provides a combined ecological slope protection structure suitable for soft soil slopes, including a concrete slope protection layer, an ecological frame nest and ecological greening plants arranged in sequence from the slope foot to the slope top;

[0006] The concrete slope protection layer is laid on the slope surface below the river channel drawdown area, and the two ends of the concrete slope protection layer are respectively connected to the footing and the top, the footing is laid at the foot of the slope along the length direction of the slope, the bottom of the footing is supported by piles, and the top is laid at one end of the concrete slope protection layer close to the top of the slope along the length direction of the slope;

[0007] The ecological frame nest is arranged within the range of the river channel drawdown area, and the bottom of the ecological frame nest is supported by piles;

[0008] The ecological green plants are arranged above the river drawdown area.

[0009] Furthermore, the footing includes a gabion and stones arranged in the gabion, a cushion layer is arranged at the bottom of the footing, and the piles at the bottom of the footing support the footing through the cushion layer.

[0010] Furthermore, a cushion layer is provided between the concrete slope protection layer and the slope surface.

[0011] Furthermore, the bottoms of the anchor foot and the top pressure are extended below the cushion layer at the bottom of the concrete slope protection layer.

[0012] Furthermore, the ecological frame nest includes a plurality of prefabricated frame units, which are laid in multiple rows along the length direction of the slope, with two adjacent rows of frame units abutting against each other, and the multiple rows of frame units are arranged in a stepped manner along the slope inclination, and the bottom of the frame units are buried below the slope surface.

[0013] Furthermore, a cushion layer is provided at the bottom of the frame unit, and the piles at the bottom of the frame unit support the frame unit through the cushion layer.

[0014] Furthermore, an upper surface of the cushion layer at the bottom of the frame unit is inclined toward the inside of the slope.

[0015] Furthermore, blocks of stone are laid in the frame unit below the normal water level, and gaps are reserved between the blocks of stone.

[0016] Furthermore, water-tolerant plants are planted in the frame units located above the normal water level.

[0017] Furthermore, the piles are fir piles.

[0018] The beneficial effects of the utility model are:

[0019] 1. The utility model arranges the slope protection structure according to the river channel drawdown area, that is, a concrete slope protection layer is arranged on the slope surface below the river channel drawdown area, an ecological frame nest is arranged within the river channel drawdown area, and ecological green plants are arranged above the river channel drawdown area, thereby ensuring the scouring resistance and ecological effect of the river bank slope; for soft soil, both ends of the concrete slope protection layer are fixed by anchoring and pressing, and the bottom of the anchoring and the bottom of the ecological frame nest are supported by piles, which can prevent the loss of slope soil, resulting in uneven settlement of the concrete slope protection layer and damage to the ecological frame nest.

[0020] 2. The footrest and ecological frame nest of the utility model are supported by cushion layers and piles, which can prevent the footrest and ecological frame nest from sinking too much and turning over due to uneven settlement, thereby enhancing the stability of the overall structure.

[0021] 3. The upper surface of the cushion layer of the ecological frame nest of the utility model is inclined inwardly toward the slope, which can improve the stability of the ecological frame nest.

[0022] 4. The ecological frame nest of the utility model adopts a plurality of prefabricated frame units, and the construction speed is fast.

[0023] 5. The laying of the ecological frame nest of the utility model can be adjusted accordingly according to the change of the water level of the river, and can meet the requirements of different bank slopes and heights.

[0024] 6. The utility model fills the frame unit below the normal water level with stones to ensure that there are sufficient pores and spaces in the frame unit to facilitate spawning of migratory fish in the river.

[0025] 7. The piles of the utility model are made of fir wood, which has the characteristics of strong anti-corrosion ability, light weight, high strength and good toughness. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0027] Figure 2 It is a cross-sectional detailed view of the ecological frame nest arrangement of the utility model.

[0028] Figure numerals: footing 1; graded crushed stone cushion layer 2; concrete slope protection layer 3; sand and gravel cushion layer 4; top pressing layer 5; ecological frame nest 6; water-resistant plants 7; ecological greening plants 8; piles 9. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] like Figure 1 As shown, this embodiment provides a combined ecological slope protection structure suitable for soft soil slopes, including a footing 1, a concrete slope protection layer 3, a top pressure 5, an ecological frame nest 6 and ecological greening plants 8 arranged in sequence from the foot of the slope to the top of the slope; the footing 1, the concrete slope protection layer 3, and the top pressure 5 are arranged below the river drawdown area to ensure stability below the river drawdown area, the ecological frame nest 6 is arranged within the river drawdown area, and can provide nests for organisms in the river, and the ecological greening plants 8 are arranged above the river drawdown area to filter surface runoff and reduce non-point source pollution.

[0031] The footing 1 is square in shape, and includes a gabion cage and stones arranged in the gabion cage. The footing 1 is arranged at the foot of the slope and laid along the length direction of the slope. A graded crushed stone cushion layer 2 is arranged at the bottom of the footing 1. The graded crushed stone cushion layer 2 can prevent uneven sinking of the footing 1. The bottom of the graded crushed stone cushion layer 2 is supported by a plurality of piles 9 to reduce the sinking amount of the footing 1.

[0032] The concrete slope protection layer 3 includes a plurality of prefabricated concrete blocks. A gravel cushion layer 4 is provided at the bottom of the concrete slope protection layer 3 to reduce uneven settlement of the concrete slope protection layer 3. One end of the concrete slope protection layer 3 close to the slope foot abuts against one side of the anchor foot 1.

[0033] The capping 5 is a prefabricated concrete structure, which is laid on one end of the concrete slope protection layer 3 close to the top of the slope and abuts against the concrete slope protection layer 3. The bottoms of the footing 1 and the capping 5 are buried below the gravel cushion layer 4 at the bottom of the concrete slope protection layer 3.

[0034] like Figure 2 As shown, the ecological frame nest 6 includes a plurality of prefabricated frame units, which are concrete structures. The plurality of frame units are laid in multiple rows along the length direction of the slope, and two adjacent rows of frame units are abutted. The plurality of rows of frame units are arranged in a stepped manner along the slope inclination. The bottom of the frame unit is buried below the slope surface, and a gravel cushion layer 4 is provided at the bottom of the frame unit. The upper surface of the gravel cushion layer 4 is provided with an inclination angle of 1:0.1 toward the inside of the slope to further ensure the stability of the frame unit. The bottom of the gravel cushion layer 4 at the bottom of the frame unit is supported by piles 9. The frame unit adjacent to the top 5 abuts against the top 5. Figure 2 In the embodiment, the left top of the frame unit farthest from the capping 5 is flush with the slope surface.

[0035] like Figure 1 As shown, the ecological greening plants 8 can be small shrubs or flowers and plants, which are planted from the top of the ecological frame nest 6 to the top of the slope to filter surface runoff and reduce non-point source pollution.

[0036] The above-mentioned piles 9 are all made of fir wood.

[0037] The construction method of the combined ecological slope protection structure is:

[0038] Step a: After the bank slope is leveled, a 1m×1m anchor 1 is set at the foot of the slope, a 30cm thick graded gravel cushion layer 2 is laid under the anchor 1, and three rows of 4m long fir piles are driven under the graded gravel cushion layer 2. The diameter of the fir piles is 10cm and the longitudinal spacing is 0.5m.

[0039] Step b: The normal water level of the river is 35.00m, and the river drawdown area ranges from 34.25m to 35.50m. A 15cm thick concrete slope protection layer 3 is set on the slope surface from the slope foot to the elevation range of 34.25m, and a 20cm thick gravel cushion layer 4 + geotextile is laid under the concrete slope protection layer 3.

[0040] Step c: A 0.8m×0.5m concrete capping 5 is provided near one end of the slope top of the concrete slope protection layer 3 .

[0041] Step d: Five rows of frame units are laid in a stepped manner on the slope within the elevation range of 34.25m to 35.50m. Three rows of 4m fir piles are driven under the frame units. The diameter of the fir piles is 10cm and the longitudinal spacing is 1.0m. A single frame unit is 50cm high, 50cm wide and 200cm long. Each row of frame units is buried 25cm and set with an inward inclination angle of 1:0.1. A 20cm thick gravel cushion layer 4 is laid under the frame units, wherein the frame units within the elevation range of 34.25m to 35.00m are filled with block stones, and the frame units within the elevation range of 35.00m to 35.50m are planted with water-resistant plants 7.

[0042] Step e: Plant small shrubs, flowers and other ecological green plants on the slope above 35.50m8.

[0043] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A combined ecological slope protection structure suitable for soft soil slopes, characterized by: It comprises a concrete slope protection layer (3), an ecological frame nest (6) and ecological greening plants (8) which are arranged in sequence from the foot of the slope to the top of the slope; The concrete slope protection layer (3) is laid on the slope surface below the river channel drawdown area, the two ends of the concrete slope protection layer (3) are respectively connected to the footing (1) and the top pressure (5), the footing (1) is laid at the foot of the slope along the length direction of the slope, the bottom of the footing (1) is supported by piles (9), and the top pressure (5) is laid at one end of the concrete slope protection layer (3) close to the top of the slope along the length direction of the slope; The ecological frame nest (6) is arranged within the range of the river channel drawdown area, and the bottom of the ecological frame nest (6) is supported by piles (9); The ecological greening plants (8) are arranged above the river drawdown area.

2. The combined ecological slope protection structure suitable for soft soil slope according to claim 1 is characterized by: The footing (1) comprises a gabion and stones arranged in the gabion, a cushion layer is arranged at the bottom of the footing (1), and piles (9) at the bottom of the footing (1) support the footing (1) through the cushion layer.

3. The combined ecological slope protection structure suitable for soft soil slope according to claim 1 is characterized by: A cushion layer is provided between the concrete slope protection layer (3) and the slope surface.

4. The combined ecological slope protection structure suitable for soft soil slope according to claim 3 is characterized by: The bottoms of the anchor foot (1) and the top pressure (5) both extend below the cushion layer at the bottom of the concrete slope protection layer (3).

5. The combined ecological slope protection structure suitable for soft soil slope according to claim 1 is characterized by: The ecological frame nest (6) comprises a plurality of prefabricated frame units, wherein the plurality of frame units are laid in a plurality of rows along the length direction of the slope, two adjacent rows of frame units are abutted, and the plurality of rows of frame units are arranged in a stepped manner along the slope inclination, and the bottom of the frame units is buried below the slope surface.

6. The combined ecological slope protection structure suitable for soft soil slope according to claim 5 is characterized by: A cushion layer is provided at the bottom of the frame unit, and the piles (9) at the bottom of the frame unit support the frame unit through the cushion layer.

7. The combined ecological slope protection structure suitable for soft soil slope according to claim 6 is characterized by: The upper surface of the cushion layer at the bottom of the frame unit is inclined toward the inside of the slope.

8. The combined ecological slope protection structure suitable for soft soil slope according to claim 5 is characterized by: Stone blocks are laid in the frame unit below the normal water level, with gaps reserved between the stones.

9. The combined ecological slope protection structure suitable for soft soil slope according to claim 5 is characterized by: Water-tolerant plants (7) are planted in the frame units located above the normal water level.

10. The combined ecological slope protection structure suitable for soft soil slope according to claim 1 is characterized in that: The pile (9) is a fir pile.

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