Novel bank protection structure of river curve convex bank high beach

Abstract

The utility model relates to a novel bank protection structure of a river curve convex bank high beach, which comprises step soil containing lattice frame areas and slope stone-paving permeable areas which are continuously arranged at intervals along the extension direction of a bank line, and the slope stone-paving permeable areas are clamped between any two adjacent step soil containing lattice frame areas. Each step of the step soil containing grid frame area comprises a concrete foundation plate located at the bottom and building block fences located on the front side, the left side and the right side of the upper portion of the concrete foundation plate, and the area, located between the building block fences, of the upper surface of the concrete foundation plate is backfilled with planting soil used for planting aquatic plants. The slope stone-laying permeable area comprises a non-woven fabric layer and a permeable stone-laying layer which are sequentially laid in a stacked mode from bottom to top. The utility model has the advantages that the intermittent guard arrangement is adopted on the plane, so that the ecological gap is increased, more living beings inhabit space is provided, and the permeation and drainage functions can be ensured; the step type arrangement is adopted on the vertical face, and soil erosion and water and soil loss can be effectively prevented.

Description

Technical Field

[0001] The utility model belongs to the field of bank slope protection, and in particular relates to a new bank protection structure for convex banks and high beaches in river bends. Background Art

[0002] Rivers are an important component of the natural geographical environment, and bends are a widely existing form of rivers. At present, bank protection structures are required to be built on both concave and convex banks at some river bends to prevent soil erosion and loss at the river bank. Most of the existing bank protection structures adopt slope-type bank protection, steep wall-type bank protection or a mixture of the two. These bank protection structures can play a role in preventing waves, water invasion and scouring, and groundwater to maintain the relative stability of the coastline. However, the above-mentioned types of bank protection structures do not take into account the water infiltration and drainage functions of the bank protection, nor do they take into account the needs of plant growth in the bank protection area, the need to provide more biological habitat space in the bank protection area, and the need to promote the increase of biological species diversity in the area. Utility Model Content

[0003] The utility model provides a novel bank protection structure for a convex bank and a high beach in a river bend, aiming to overcome the above-mentioned shortcomings of the prior art to at least a certain extent.

[0004] The technical solution of the utility model to solve the above-mentioned technical problems is as follows: a new type of revetment structure for high beaches on convex banks of river bends, comprising a step soil-filling grid frame area and a slope stone-paved permeable area arranged continuously and at intervals along the extension direction of the coastline, the slope stone-paved permeable area is sandwiched between any two adjacent step soil-filling grid frame areas, each step of the step soil-filling grid frame area comprises a concrete foundation plate at the bottom and block fences located on the front side and left and right sides above the concrete foundation plate, the area on the upper surface of the concrete foundation plate between the block fences is backfilled with planting soil for planting aquatic plants, and the slope stone-paved permeable area comprises a non-woven fabric layer and a permeable stone layer stacked and laid in sequence from the bottom layer to the upper layer.

[0005] On the basis of the above technical solution, the present invention can also be improved as follows.

[0006] Furthermore, the concrete foundation plate is pre-embedded with a plurality of anchoring steel bars extending upward, and the block fence is preset with anchoring holes, and the anchoring steel bars are inserted into the anchoring holes and fixed by pouring mortar.

[0007] Furthermore, the block fence is formed by stacking two layers of block bricks, and the upper surface of the block bricks in the top layer and the anchor holes are covered with the planting soil.

[0008] Furthermore, each step soil grid frame area has a total of 8-10 steps, each step has a length of 350-450cm along the coastline, a width of 130-160cm, a height of 50-60cm, a thickness of the concrete foundation plate of 30-40cm, a height of the masonry bricks of 30-40cm, and a thickness of the planting soil of 40-60cm.

[0009] Furthermore, the length of the slope stone permeable area along the coastline is 180-220 cm, and the non-woven fabric layer is composed of 400 g / m 2 The permeable paving layer is composed of non-woven fabric, and the thickness of the permeable paving layer is 50-60 cm. The permeable paving layer can be composed of pebbles or crushed stones with a size of 5-10 cm in each direction, or can be formed by staggered paving of blocks layer by layer, with permeable holes left between adjacent blocks.

[0010] Furthermore, the step soil grid frame area has a total of 8 steps, and the steps are numbered from the first to the eighth from low to high. The first and second steps are planted with emergent plants such as reeds, reeds, vetiver and foxtail grass are planted on the third and fourth steps, vetiver, bahia grass and cyperus are planted on the fifth and sixth steps, bahia grass, dogtooth grass and dogtooth grass are planted on the seventh and eighth steps, and the slope paved stone permeable area is sown with dogtooth grass and / or bullwhip seeds.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The bank protection structure adopts an intermittent guarding arrangement on the plane (i.e., the sloped stone paving permeable area is sandwiched between any two adjacent step soil grid frame areas), which increases the ecological gap, provides more space for biological habitats, and promotes the increase of biological species diversity; on the facade, a stepped arrangement is adopted, which can effectively prevent soil erosion and soil and water loss. By setting multiple steps on the facade, the scouring force of ship waves on the slope can be effectively reduced, and the sloped stone paving permeable area is conducive to water infiltration and drainage, ensuring the stability of the slope and the growth needs of plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A top view of a novel bank protection structure for a high bank on a river bend provided by the utility model;

[0014] Figure 2 for Figure 1 A front view of the bank protection structure shown;

[0015] Figure 3 for Figure 1 Left side view of the bank protection structure shown;

[0016] Figure 4 for Figure 1 A cross-sectional view of the bank protection structure shown along the front-rear direction;

[0017] Figure 5 for Figure 1 A top view of a step of the revetment structure shown (where the block fence has not yet been covered by planting soil).

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0019] 1. Step soil-holding frame area; 2. Slope stone paving permeable area; 3. Concrete foundation slab; 4. Block fence; 5. Planting soil; 6. Non-woven fabric layer; 7. Permeable stone paving layer; 8. Anchor steel bars. DETAILED DESCRIPTION

[0020] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0021] In the description of the present invention, if terms indicating orientation such as "up", "down", "left", "right", "top", "bottom", "inside" and "outside" are used, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] like Figures 1 to 5 As shown, the utility model provides a new type of revetment structure for convex banks and high beaches at river bends, which includes a step soil-filled grid frame area 1 and a slope stone-paved permeable area 2 which are continuously and spaced apart along the extending direction of the coastline, and the slope stone-paved permeable area 2 is sandwiched between any two adjacent step soil-filled grid frame areas 1, and each step of the step soil-filled grid frame area 1 includes a concrete base plate 3 at the bottom and block fences 4 located on the front side and left and right sides above the concrete base plate 3, and the area on the upper surface of the concrete base plate 3 between the block fences 4 is backfilled with planting soil 5 for planting aquatic plants, and the slope stone-paved permeable area 2 includes a non-woven fabric layer 6 and a permeable stone layer 7 which are stacked and laid in sequence from the bottom layer to the upper layer.

[0023] It should be noted that the edges of both sides and the bottom of the entire revetment structure area provided by the utility model are connected to the steel wire mesh used in the common revetment structure, and the top elevation is consistent with the elevation of the intercepting ditch.

[0024] In one embodiment of the utility model, the concrete foundation plate 3 is pre-embedded with a plurality of anchoring steel bars 8 extending upward, and the block fence 4 is pre-set with anchoring holes, and the anchoring steel bars 8 are inserted into the anchoring holes and fixed by pouring mortar. The concrete foundation plate is a precast concrete plate, prepared with C20 concrete, such as Figure 3 and 4 As shown, the side of the concrete foundation plate extending toward the river channel is the front edge, and a flange with a thickness of about 10 cm is provided on the upper surface of the front edge, and a block fence is provided on the inner side of the flange.

[0025] In one embodiment of the utility model, the block fence 4 is formed by stacking two layers of block bricks, and the upper surface of the block bricks in the top layer and the anchor holes are covered with the planting soil 5.

[0026] In one embodiment of the utility model, each step soil grid frame area 1 is provided with 8-10 steps, the length of each step along the coastline direction is 350-450cm, the width is 130-160cm, the height is 50-60cm, the thickness of the concrete foundation plate 3 is 30-40cm, the height of the building block brick is 30-40cm, and the thickness of the planting soil 5 is 40-60cm.

[0027] In one embodiment of the present invention, the length of the slope stone paving permeable area 2 along the coastline is 180-220 cm, and the non-woven fabric layer 6 is made of 400 g / m 2 The permeable paving layer 7 is composed of non-woven fabric, the thickness of the permeable paving layer 7 is 50-60cm, the permeable paving layer 7 can be composed of pebbles or crushed stones with dimensions of 5-10cm in all directions, or can be composed of blocks of stones laid in layers, with permeable holes left between adjacent blocks of stones.

[0028] In one embodiment of the utility model, the step soil grid frame area 1 is provided with 8 steps in total, and the steps are numbered from the first to the eighth from low to high. The first and second steps are planted with emergent plants such as reeds, reeds, vetiver and foxtail grass are planted on the third and fourth steps, vetiver, bahia grass and cyperus are planted on the fifth and sixth steps, bahia grass, dogtooth grass and dogtooth grass are planted on the seventh and eighth steps, and the slope paved permeable area 2 is sown with dogtooth grass and / or bullwhip seeds.

[0029] The new revetment structure provided by the utility model was used to carry out application tests in the high beach protection project of the Xiongjiazhou bend convex bank, as follows:

[0030] On the slope of the section K1+400# to K1+600# of the Xiongjiazhou bend convex bank high beach protection project, a 200m test section of new revetment with a horizontal width of 12m was arranged along the coastline.

[0031] A soil-holding grid frame structure with a length of 4 m is arranged every 2 m in the area (i.e., the stepped soil-holding grid frame area 1). The top of the fence is connected to the interception ditch, and the two sides and the bottom are connected to the wire mesh.

[0032] Soil Grid Area (Step Soil Grid Area 1): The steps are made of soil grid block structures. The blocks are placed on the terraced slope. Each step is 4m long, 1.5m wide and 0.5m high, with a total of 8 steps. The steps are made of C20 concrete foundation slabs. Each step is built with two layers of soil grid block bricks. Anchor steel bars are placed in the anchor holes of the blocks, and mortar is poured to fix the concrete foundation slab and the two layers of soil grid blocks. Then, 40cm of nutrient soil is backfilled in the fence and the block anchor holes, and vegetation is planted.

[0033] Intermittent area (slope paving permeable area 2): large-pore paving structure is used, the length along the coastline is 2m, a total of 33 groups, or 66m, paved with 400g / m 2 The non-woven fabric and 0.50m thick large-pore paving stone are connected to the common revetment structure, namely the wire mesh, at the bottom, and the two sides are soil-filled grid structures, and the top elevation is consistent with the interception ditch elevation. Among them, the specific method of laying non-woven fabric is that when the bank slope meets the design requirements, the non-woven fabric is constructed, and the roll material is controlled by a winch (or manpower). The length direction of the non-woven fabric should be perpendicular to the shoreline, and it should be rolled from the top of the slope to the low-water platform. The laying speed should be consistent to prevent slanting. The non-woven fabric should be laid with appropriate tightness and no wrinkles should be formed to ensure that the non-woven fabric fits tightly to the slope. The top of the slope of the revetment should be anchored and ballasted to leave a surplus. The adjacent two non-woven fabrics overlap each other, the overlap width is 0.2m, and the overlap is mechanically sewn with nylon thread. All stitching must be continuous, and the stitch distance should not be greater than 15mm. The specific content of large-gap paving construction is as follows: For paving construction, stones of appropriate sizes should be selected and carried out in layers from bottom to top. The stones should be roughly square, with the large surface facing upwards, and the stones should be staggered with each other to ensure a smooth surface with gaps.

[0034] Planting: The soil in the soil grid area is backfilled with a thickness of 40cm. There are 34 groups of soil grids, 33 of which are 4 meters long and 1 is 2 meters long. The steps on the slope from K1+400# to K1+500# are from low to high. The first and second steps are planted with emergent plants such as reeds, the third and fourth steps are planted with reeds + vetiver + dogtail grass, the fifth and sixth steps are planted with vetiver + bahia grass + tongquan grass, and the seventh and eighth steps are planted with bahia grass + bermudagrass + tongquan grass. The slope from K1+500# to K1+600# is from low to high. The first and second steps are planted with double spike paspalum + phalaenopsis + wild pea, the third, fourth and fifth steps are planted with bermudagrass + bullwhip grass + wild pea, and the sixth, seventh and eighth steps are planted with cyperus + double spike paspalum + motherwort. The intermittent areas are sprayed with seeds of native plants such as bermudagrass and bullwhip grass.

[0035] After the construction was completed, observations after use showed that the above-mentioned bank protection structure can achieve a good effect in preventing soil erosion on the bank slope. At the same time, it has good permeability and drainage, which can ensure the water exchange between the river bank and the river water body.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of bank protection structure for high banks on river bends, characterized in that: The invention comprises a step soil-holding grid frame area (1) and a slope stone-paved permeable area (2) which are arranged continuously and at intervals in the extending direction of the coastline, wherein the slope stone-paved permeable area (2) is sandwiched between any two adjacent step soil-holding grid frame areas (1), each step of the step soil-holding grid frame area (1) comprises a concrete base plate (3) located at the bottom and block fences (4) located above the front side and on the left and right sides of the concrete base plate (3), the area on the upper surface of the concrete base plate (3) between the block fences (4) is backfilled with planting soil (5) for planting aquatic plants, and the slope stone-paved permeable area (2) comprises a non-woven fabric layer (6) and a permeable stone paving layer (7) which are stacked and laid in sequence from the bottom layer to the upper layer.

2. A new type of bank protection structure for high bank of river bend according to claim 1, characterized in that: The concrete foundation plate (3) is pre-buried with a plurality of anchoring steel bars (8) extending upward, and the block fence (4) is pre-set with anchoring holes, and the anchoring steel bars (8) are inserted into the anchoring holes and fixed by pouring mortar.

3. A new type of bank protection structure for high bank of river bend according to claim 2, characterized in that: The block fence (4) is formed by stacking two layers of block bricks, and the upper surface of the block bricks on the top layer and the anchor holes are covered with the planting soil (5).

4. A new type of bank protection structure for high bank of river bend according to claim 3, characterized in that: Each step soil grid frame area (1) is provided with 8-10 steps, each step has a length of 350-450 cm along the coastline, a width of 130-160 cm, and a height of 50-60 cm, the thickness of the concrete foundation plate (3) is 30-40 cm, the height of the building block brick is 30-40 cm, and the thickness of the planting soil (5) is 40-60 cm.

5. The novel bank protection structure for high bank of river bend according to claim 1 is characterized in that: The length of the slope stone paving permeable area (2) along the coastline is 180-220 cm, and the non-woven fabric layer (6) is made of 400 g / m 2 The permeable paving layer (7) is composed of non-woven fabric, and the thickness of the permeable paving layer (7) is 50-60 cm.

6. A new type of bank protection structure for high bank of river bends according to claim 5, characterized in that: The permeable paving layer (7) is composed of pebbles or crushed stones with dimensions of 5-10 cm in all directions.

7. The novel bank protection structure for high bank of river bend according to claim 5 is characterized in that: The permeable stone paving layer (7) is formed by staggered paving of stone blocks layer by layer, with permeable holes left between adjacent stone blocks.

8. A new type of bank protection structure for high bank of river bends according to any one of claims 1 to 7, characterized in that: The step soil grid frame area (1) is provided with 8 steps in total, and the steps are numbered from the first step to the eighth step from the lowest to the highest. The first and second steps are planted with emergent plants such as reeds, the third and fourth steps are planted with reeds, vetiver and foxtail grass, the fifth and sixth steps are planted with vetiver, bahia grass and fennel grass, and the seventh and eighth steps are planted with bahia grass, dogtooth grass and fennel grass. The slope stone paving permeable area (2) is sown with dogtooth grass and / or bullwhip seeds.

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