A top-down construction method for flood control and drainage river slope protection and ecological clamping body

Abstract

The invention discloses a top-down construction method and an ecological clamping body for flood control and drainage river slope protection. The construction method includes pre-construction design; first, excavation starts from the highest point of the river slope protection, sorts out the first-level slope surface and the stepped horizontal working road, and splices the ecological clamping body to the top of the slope surface to form the first-level slope protection surface; continue to construct to form the second-level slope protection surface and the second-level stepped horizontal working road, cast the first-level stepped horizontal working road, close the bottom of the first-level slope protection surface and the top of the second-level slope protection surface, and form a closed hardened road surface until the Nth time, forming a multi-level slope protection surface and a multi-level stepped horizontal working road, until the depth of the bottom of the riverbed reaches the designed depth; finally, water operation is carried out, the ecological clamping body is spliced, and the slope surface is pushed downward into the water to form the last-level slope protection surface. The invention is constructed from top to bottom, which is convenient for coordinating operations and cross operations with river dredging; it is beneficial to expand the cross-sectional area of ​​river water flow and lower the water level, thereby realizing flood control and drainage.

Description

Technical Field

[0001] The invention relates to a river channel slope protection project, in particular to a top-down construction method for flood control and drainage river channel slope protection and an ecological clamping body. Background Art

[0002] River bank protection refers to the general term for various paving and planting on the slope surface to prevent the river bank from being eroded. In order to play the role of flood diversion and drainage in the river channel, it is necessary to dredge and protect the bank slope, as well as the river section where the bridge is located. The concave bank of the river bank is eroded by the water flow year by year, which will cause the river bank to collapse continuously. In order to protect the safety of bridges and embankments, protective buildings must be built on the concave bank. In addition, when the river flow direction changes due to the construction of bridges, the river bank is eroded and endangers farmland and villages, protective buildings must also be built on the river bank. This kind of building is usually called revetment. There are two forms of revetment: direct protection and indirect protection. Direct protection is to directly reinforce the river bank slope to resist the erosion and scouring of the water flow. Commonly used methods include concrete pouring, riprap, dry-laid stone, mortar-laid stone, gabions and top bundles. Indirect protection is suitable for river sections with wide riverbeds or long protection lengths. Groynes, spur dams and grid dams can be built to divert water away from the river bank.

[0003] According to the function of slope protection, it can be roughly divided into two types: (A) It is only a slope protection layer that resists weathering and erosion. This protection layer does not bear lateral soil pressure, such as shotcrete slope protection, grid frame vegetation slope protection, vegetation slope protection, etc., which are only suitable for gentle and stable slopes without sliding risk. (B) Retaining slope protection that provides anti-sliding force can be roughly divided into: (a) rigid self-weight retaining wall (such as: stone retaining wall, gravity retaining wall, leaning retaining wall, cantilever retaining wall, buttress retaining wall), (b) flexible self-weight retaining wall (such as: snake cage retaining wall, frame strip retaining wall, reinforced retaining wall), (c) anchor retaining wall (such as: anchor grid beam retaining wall, anchor pile retaining wall).

[0004] Problems with existing general river slope protection methods:

[0005] 1. When some rivers are dredged, no slope protection is carried out, and the silt is temporarily piled up on both sides of the river. Over time, coupled with rain erosion and gravity sedimentation, the silt slowly collapses and flows into the river, raising the riverbed.

[0006] 2. When dredging some rivers, high-pressure water guns are used to blast the silt into mud that flows downstream. Although this part of the river has been dredged, there will still be some sedimentation downstream, which raises the downstream riverbed and is not conducive to increasing the overall flow cross-sectional area.

[0007] 3. Generally, the cofferdam is built first, and then the water is pumped out, the earth and stone are excavated to build the slope protection foundation, and then the slope is protected by stone slabs or poured with concrete. The cost is too high and the construction time is limited by the seasonal flood season.

[0008] 4. Generally, square bricks, hexagonal bricks, grass bricks and other methods are used. Water can directly wash away the soil through the gaps between bricks and the holes in the bricks. The slope protection can be easily damaged by the strong and continuous washing force when floods come, thus further losing the protection of the river bank, leading to the collapse or even bursting of the river bank.

[0009] 5. There are also methods such as nylon mesh, metal mesh plus stones. Nylon will age and lose its strength, and metal will rust and lose its strength, thus losing its fixing effect.

[0010] In short, river bank protection projects are engineering measures taken to protect river banks from water flow, wind and wave invasion and scouring. According to the type of structural materials, there are mainly cast-in-place concrete revetments, stone revetments, concrete block revetments, permeable pile revetments, turf ecological revetments, etc. Although cast-in-place concrete revetments are very strong and have good integrity, they require cofferdams and pumping construction, which is very costly. They will also crack and leak due to thermal expansion and contraction, weakening their ability to resist scouring. Cast-in-place concrete revetments also have the disadvantages of being inconvenient to construct and cannot be constructed when the water level is high. Stone revetment has the advantages of using local materials, simple and flexible construction, adapting to riverbed deformation, being able to be implemented in stages, and being gradually reinforced. However, stone revetment is very expensive, consumes a lot of manpower and material resources, the overall strength of the overlapping stones is not high, and it does not meet environmental protection requirements; concrete block revetment is mainly used for protecting wind and waves on embankments, dams, and banks of relatively stable rivers; permeable pile dams have a certain effect of slowing down flow and siltation, and are only suitable for shallow water and slow flow; turf ecological revetment is mainly used for embankment (bank) slopes with short flooding time, small flow rate and waves, and flow direction basically parallel to the river bank, and has a small range of adaptability. Summary of the invention

[0011] In response to the problems existing in the above-mentioned prior art, the present invention provides a top-down construction method and an ecological clamping body for flood control and drainage river slope protection, which is easy to construct, has strong adaptability, is resistant to river scouring, has good slope stability, and can be planted with green plants.

[0012] The first technical solution adopted by the present invention to solve the technical problem is: a top-down construction method for flood control and drainage river slope protection:

[0013] Pre-construction design: According to the highest flood flow for flood control and drainage, the cross-sectional area and riverbed depth of the river are designed. The cross-sectional shape is designed to be a stepped river slope protection. If the slope depth is less than 3 meters, no stepped river slope protection is required.

[0014] Construction method: For the first construction, excavation starts from the highest point of the river slope protection. According to the designed depth of the first-level slope surface, a flat slope surface above the water surface and a first-level stepped horizontal working road intersecting with the slope surface are arranged. Then, a layer of ecological card connectors are spliced ​​horizontally, and then spliced ​​vertically. The ecological card connectors in the vertical direction can move up and down along the card slots, but the ecological card connectors cannot move left and right. However, there can be a certain small gap to provide the mobility of moving up and down. In this way, the first-level slope protection surface is formed by splicing to the top of the slope surface. This top can be further constructed and raised as needed in the future;

[0015] During the second construction, the water level will drop naturally or after dredging or deep excavation of the river channel, and then the second-level slope protection surface and the second-level stepped horizontal working road will be formed under the stepped horizontal working road according to the method of the first construction. The first-level stepped horizontal working road will be poured with concrete, and the bottom of the first-level slope protection surface and the top of the second-level slope protection surface will be closed to form a closed hardened road surface. This process will be repeated until the Nth time, forming multi-level slope protection surfaces and multi-level stepped horizontal working roads, until the depth of the riverbed bottom reaches the designed depth before the last construction begins;

[0016] The last construction is when the process of dredging the river or digging to the set riverbed depth is completed, and the water level no longer drops, construction is carried out with water. Excavation continues above the water surface below the lowest level of the stepped horizontal working road to form a designed slope. Excavation is carried out to a height above the water surface, and then a layer of ecological connectors are spliced ​​horizontally, and then spliced ​​vertically until the edge of the lowest level of the stepped horizontal working road. Then, a mechanical arm or tools are used on a boat to loosen or dig up the soil below the lowest level of the ecological connector, and then an external force is used to push the entire ecological connector to the bottom. The ecological connectors are continued to be spliced ​​to the edge of the lowest level of the stepped horizontal working road. Then, a mechanical arm or tools are used on a boat to loosen or dig up the soil below the lowest level of the ecological connector, and then an external force is used to push the entire ecological connector to the bottom. This operation is carried out to reach the bottom of the riverbed of the designed depth, and the lowest ecological connector is inserted into the bottom of the riverbed of the designed depth, and then the riverbed is filled.

[0017] At this point, the riverbed depth and cross-sectional area of ​​the river channel have been reached as set, ensuring that the flow of the largest flood that occurs once in a century can pass smoothly, and the flood peak will not reach the top of the river bank, ultimately achieving river management for flood control and drainage.

[0018] The second technical solution adopted by the technical problem to be solved by the present invention is: the ecological snap-in body is usually cast into a mold with cement concrete, which is initially hardened and then demolded and then cured as a whole. The ecological snap-in body is composed of an intermediate plate body, a base plate body integrally connected to one side of the intermediate plate body, and an outer plate body in contact with water that is integrally connected to the other opposite side of the intermediate plate body. The left end of the intermediate plate body extends outward from the left end of the base plate body to form a transverse snap-in tenon, and the right end is recessed between the base plate body and the right end of the outer body to form a transverse snap-in groove, and the transverse snap-in tenon can be movably embedded in the transverse snap-in groove; the top of the intermediate plate body is higher than the top of the base plate body, and a longitudinal upper snap-in groove is provided in the middle of the upper end of the intermediate plate body. Ⅰ, the lower end of the middle plate body is recessed in the lower end of the base plate body to form a longitudinal lower clamping groove Ⅲ, and a longitudinal lower clamping tenon Ⅰ which can be movably extended into the longitudinal upper clamping groove Ⅰ is arranged in the middle of the lower end of the middle plate body; both ends of the middle plate body can be movably extended into the longitudinal lower clamping groove Ⅲ; the middle of the upper ends of the base plate body and the outer plate body are both provided with a longitudinal upper clamping groove Ⅱ, and the middle of the lower ends of the base plate body and the outer plate body are both provided with a longitudinal lower clamping tenon Ⅱ which can be extended into the longitudinal upper clamping groove Ⅱ; the base plate body and the outer plate body are provided with lifting blind holes, and the outer plate body is triangular. When the ecological clamping bodies are mutually clamped on the slope surface of the slope protection, a stair step-like protrusion structure can be formed, and the base plate body is provided with a back reinforcement guide slider which can be pressed into the slope foundation soil.

[0019] Furthermore, the upper end of the outer plate body is provided with a transition groove which is smoothly connected to the longitudinal upper clamping groove II in the middle of the upper end of the outer plate body, and the lower end of the outer plate body is provided with a transition clamping tenon which is smoothly connected to the longitudinal lower clamping tenon II in the middle of the lower end of the outer plate body and matches the transition groove.

[0020] The top-down slope protection method of the present invention comprises the following steps: first, excavating or tidying up a flat slope surface on the slope surface above the water level, or pouring a concrete base on the slope surface, on which guide grooves are arranged at intervals to match the back reinforcement guide blocks on the slope protection body, and an ecological clamping body made of concrete is clamped with each other up and down and left and right to form an integral slope protection surface and a horizontal construction road at both ends of the river channel, which is convenient, efficient, safe and reliable in construction, and the constructed slope protection body is stable and has good erosion resistance; second, when the river channel is desilted or the water level drops in the dry season, a second-level slope protection and road are formed in the area where the water level drops according to the first step method. , and pour the first level of road concrete until the water level no longer drops after dredging and digging the riverbed to the set depth, and enter the last level of slope protection process; the third is water-carrying operation, which involves stacking the ecological connector according to the set slope, pushing it down with external force (such as construction machinery), and then using a mechanical arm to dig out the soil below the connector, and adding an ecological connector above the ecological connector, continuing to push it down, and so on, until it penetrates deep into the riverbed to form an overall slope protection surface, and then pouring the construction road with concrete and closing the interfaces at both ends of the slope protection; for small rivers without multi-level stepped slope protection, construction can be carried out from top to bottom using only the last step of water-carrying operation.

[0021] The slope protection surface formed by the docking of the snap-fitting tenons and the snap-fitting grooves of the present invention will not form a straight-through gap, so that water will not directly wash the soil behind the slope protection wall (but it will penetrate. If the river channel is too deep and the water pressure is high, an anti-seepage layer must be made under the slope bank). Each base body and the upper and lower surfaces of the outer layer are provided with non-through lifting holes. The front of the outer layer has a horizontal step-shaped protrusion, which is used to apply a downward thrust during construction to achieve the riverbed depth and river cross-sectional area set for the river channel, ensuring that the flow of the largest flood once in a hundred years passes smoothly, and the flood peak will not reach the top of the river bank, ultimately achieving river management for flood control and drainage. A hollow grass-planting inner groove is provided in the horizontal step-shaped protrusion on the front of the outer layer. Filling it with soil can green the river channel slope protection, promote ecological protection, and beautify the environment.

[0022] Compared with the prior art, the present invention has the following characteristics:

[0023] 1. The ecological snap-fit ​​blocks can snap into each other and will not fall apart;

[0024] 2. The ecological card joint has mortise and tenon joints on the top, bottom, left and right sides, so the river water will not directly impact the soil behind the slope protection body, and it is resistant to water erosion;

[0025] 3. The slope protection ecological clamp can be moved up and down to achieve pushing from top to bottom;

[0026] 4. The slope protection ecological clamp body comes with a ladder, which is convenient for people to go up and down and for equipment to go up and down;

[0027] 5. The slope protection ecological clamping body has symmetrical lifting blind holes to facilitate mechanical construction;

[0028] 6. Equipped with matching male and female elbows and small width accessories to facilitate bends and joints;

[0029] 7. The step-by-step construction from top to bottom facilitates coordinated and cross-operation with river dredging;

[0030] 8. River bank protection and silt removal are beneficial to expanding the flow cross-sectional area and lowering the water level, thereby achieving flood control and drainage;

[0031] 9. It has a wide range of applications and can be used for excavation or silt removal and slope protection of ponds, small reservoirs, etc.;

[0032] 10. The ecological card connector has a hollow inner groove, which can be used for planting, beautifying the environment and protecting the ecology. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic diagram of the cross-sectional structure of the river bank protection after construction of the present invention,

[0034] Figure 2 yes Figure 1 BB cross-sectional structure diagram,

[0035] Figure 3 yes Figure 1 Schematic diagram of the C-direction structure,

[0036] Figure 4 This is a schematic diagram of the main structure of the slope protection ecological clamping body of the present invention.

[0037] Figure 5 yes Figure 4 AA cross-sectional structure diagram,

[0038] Figure 6 It is a schematic diagram of the top view of the structure of the slope protection ecological clamping body of the present invention.

[0039] In the figure, 1, back reinforcement guide slider, 2, horizontal clamping groove, 3, longitudinal upper clamping groove I, 4, longitudinal upper clamping groove II, 5, transition clamping groove, 6, lifting blind hole, 7, outer plate body, 8, longitudinal lower clamping groove III, 9, transition clamping tenon, 10, longitudinal lower clamping tenon I, 11, longitudinal lower clamping tenon II, 12, base plate body, 13, middle plate body, 14, horizontal clamping tenon, 15, grass planting inner groove, 16, highest point of river slope protection, 17, original water level, 18, soil layer, 19, ecological clamping body, 20, stepped horizontal working channel, 21, closed hardened road surface, 22, riverbed bottom of designed depth, 23, water level after dredging or deep excavation, 24, warning water level. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in combination with specific embodiments according to the accompanying drawings.

[0041] like Figure 1 As shown, the top-down construction method of the flood control and drainage river slope protection described in the present invention is:

[0042] Pre-construction design: According to the highest flood flow for flood control and drainage, the cross-sectional area and riverbed depth of the river are designed. The cross-sectional shape is designed to be a stepped river slope protection. If the slope protection depth is less than 3 meters, no stepped river slope protection is required.

[0043] Construction method: For the first construction, excavation starts from the highest point 16 of the river slope protection, and a flat slope surface above the water surface and a first-level stepped horizontal working channel 20 intersecting with the slope surface are arranged according to the depth of the designed first-level slope protection surface (a concrete base layer can also be poured on the soil layer 18 of the slope surface, and guide grooves that are movably matched with the back reinforcement guide blocks on the slope protection body are arranged at intervals on the concrete base layer), and then the ecological clamping body 19 is spliced ​​in a layer in the horizontal direction, and then in the vertical direction. The ecological clamping bodies in the vertical direction can move up and down along the horizontal clamping groove 2, but the ecological clamping bodies cannot move left and right, but there can be a certain small gap to provide the mobility of moving up and down, so that they are spliced ​​to the top of the slope surface to form the first-level slope protection surface, and the top can be further constructed and raised as needed in the future (for example, when there is no place to pile up mud and rocks after dredging or deep excavation, and the mud and rocks after dredging or deep excavation are used to raise the top of the river channel);

[0044] The second construction is to wait for the water level to drop naturally or arrange for dredging or deep excavation of the river channel until the water level drops, for example Figure 1 In the process, the water level 17 is lowered to the water level 23 after dredging or deep excavation, and then the second-level slope protection surface and the second-level stepped horizontal working road are formed under the first-level stepped horizontal working road 20 according to the first construction method. The first-level stepped horizontal working road is poured with concrete, and the bottom of the first-level slope protection surface and the top of the second-level slope protection surface are closed at the same time to form a closed hardened road surface 21. This process is repeated until the Nth time, forming multi-level slope protection surfaces and multi-section stepped horizontal working roads, until the depth of the riverbed bottom reaches the designed depth and then the last construction is started;

[0045] The last construction is to carry out water construction when the dredging or deep excavation of the river channel is completed and the water level no longer drops. Excavation is continued above the water surface below the lowest level of the stepped horizontal working road to form a designed slope. The excavation is carried out to a height above the water surface, and then the ecological card connector is spliced ​​in a layer in the horizontal direction, and then spliced ​​in the vertical direction until the edge of the lowest level of the stepped horizontal working road. Then, a mechanical arm or a tool on a ship is used to loosen or dig up the soil below the lowest level of the ecological card connector, and then an external force (such as engineering machinery and equipment) is used to push the entire ecological card connector to the bottom, and the ecological card connector is continued to be spliced ​​to the edge of the lowest level of the stepped horizontal working road. Then, a mechanical arm or a tool on a ship is used to loosen or dig up the soil below the lowest level of the ecological card connector, and then an external force is used to push the entire ecological card connector to the bottom. In this way, the riverbed bottom 22 of the designed depth is reached, and the lowest ecological card connector is inserted into the riverbed bottom of the designed depth. If the slope protection depth is less than 3 meters, it is only necessary to carry out water construction according to the last construction method.

[0046] At this point, the riverbed depth and cross-sectional area set for the river channel are reached, ensuring that the flow of the largest flood in more than a hundred years can pass smoothly, and the flood peak will not reach the top of the river bank (not exceeding the warning water level 24), ultimately achieving river management for flood control and drainage.

[0047] like Figure 2-6In the present invention, the ecological snap-in body 19 is usually cast into a mold with cement concrete, which is initially hardened and demoulded before being cured as a whole. The ecological snap-in body is composed of an intermediate plate body 13, a base plate body 12 integrally connected to one side of the intermediate plate body, and an outer plate body 7 integrally connected to the other opposite side of the intermediate plate body and in contact with water. A grass-planting inner groove 15 is arranged on the upper part of the outer plate body, and the grass-planting inner groove is a blind hole groove. The left end of the intermediate plate body extends outward from the left end of the base plate body to form a transverse snap-in tenon 14, and the right end is recessed between the base plate body and the right end of the outer layer body to form a transverse snap-in groove 2, and the transverse snap-in tenon 14 can be movably embedded in the transverse snap-in groove 2 (the ecological snap-in body and the transverse snap-in tenon 14 and the transverse snap-in groove 2 can be designed in special places such as river bends to have a certain curvature or slope for easy connection); the top of the intermediate plate body is higher than the top of the base plate body, and the upper end of the intermediate plate body 13 A longitudinal upper clamping groove Ⅰ3 is arranged in the middle, and the lower end of the middle plate body is recessed in the lower end of the base plate body to form a longitudinal lower clamping groove Ⅲ8, and a longitudinal lower clamping tenon Ⅰ10 which can movably extend into the longitudinal upper clamping groove Ⅰ3 is arranged in the middle of the lower end of the middle plate body; both ends of the middle plate body 13 can movably extend into the longitudinal lower clamping groove Ⅲ8; the middle of the upper ends of the base plate body and the outer plate body are both provided with a longitudinal upper clamping groove Ⅱ4, and the middle of the lower ends of the base plate body and the outer plate body are both provided with a longitudinal lower clamping tenon Ⅱ11 which can extend into the longitudinal upper clamping groove Ⅱ4; the base plate body and the outer plate body are provided with a lifting blind hole 6, and the cross-section of the outer plate body is triangular. When the slope protection special-shaped clamping bodies are mutually clamped on the slope surface of the slope protection, a staircase-like protrusion structure can be formed, and the base plate body is provided with a back reinforcement guide slider 1 pressed into the soil, which is conducive to pushing the ecological clamping body to move downward, and leaving a certain space for machinery to extend into the space for operation.

[0048] In addition, the upper end of the outer plate body is provided with a transition groove 5 which is smoothly connected to the longitudinal upper clamping groove Ⅱ4 in the middle of the upper end of the outer plate body, and the lower end of the outer plate body is provided with a transition clamping tenon 9 which is smoothly connected to the longitudinal lower clamping tenon Ⅱ11 in the middle of the lower end of the outer plate body and matches the transition groove.

[0049] The above implementation modes are only used to illustrate the technical solutions of the present invention rather than to limit the present invention. Although the present invention has been described in detail with reference to specific embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be included in the scope of protection of the claims of the present invention.

Claims

1. A top-down construction method for flood control and drainage river slope protection, characterized in that: Pre-construction design: According to the highest flood flow for flood control and drainage, the cross-sectional area and riverbed depth of the river are designed. The cross-sectional shape is designed to be a stepped river slope protection. If the slope protection depth is less than 3 meters, a flat slope protection surface is used instead of a stepped river slope protection. Construction method: For the first construction, excavation is started from the highest point (16) of the river slope protection, and a flat slope surface above the water surface and a first-level stepped horizontal working road (20) intersecting the slope surface are arranged according to the designed depth of the first-level slope protection surface. Then, the ecological clamping bodies (19) are spliced ​​in a layer in the horizontal direction, and then spliced ​​in the vertical direction. The ecological clamping bodies in the vertical direction can move up and down along the horizontal clamping groove (2), but the ecological clamping bodies cannot move left and right. However, there is a certain small gap to provide the mobility of moving up and down. In this way, the first-level slope protection surface is formed by splicing to the top of the slope surface, and the top is further constructed and raised as needed; During the second construction, after the water level drops naturally or after dredging or deep excavation, the water level drops, and then the second-level slope protection surface and the second-level stepped horizontal working road are formed under the first-level stepped horizontal working road (20) according to the method of the first construction. The first-level stepped horizontal working road is poured with concrete, and the bottom of the first-level slope protection surface and the top of the second-level slope protection surface are sealed to form a closed hardened road surface (21). This is repeated until the Nth time, forming multiple slope protection surfaces and multiple stepped horizontal working roads, until the depth of the riverbed bottom reaches the designed depth before entering the final construction; The last construction is to carry out water construction after the dredging or deep excavation of the river channel is completed to the set riverbed depth and the water level no longer drops. Continue to excavate above the water surface below the lowest level of the stepped horizontal working road to form a designed slope. Excavate to a height above the water surface, then splice the ecological clamp body in a layer in the horizontal direction, and then splice it in the vertical direction until the edge of the lowest level of the stepped horizontal working road. Then use a mechanical arm or a tool on a ship to loosen or dig up the soil below the lowest level of the ecological clamp body, and then use external force to push the entire ecological clamp body to the bottom. Continue to splice the ecological clamp body to the edge of the lowest level of the stepped horizontal working road. Then use a mechanical arm or a tool on a ship to loosen or dig up the soil below the lowest level of the ecological clamp body, and then use external force to push the entire ecological clamp body to the bottom. In this way, the riverbed bottom (22) of the designed depth is reached, and the lowest ecological clamp body is inserted into the riverbed bottom of the designed depth. If the slope protection depth is less than 3 meters, it is only necessary to carry out the last construction method with water.

2. An ecological clamping body for flood control and drainage river slope protection, characterized in that: The ecological snap-in body (19) is composed of an intermediate plate body (13), a base plate body (12) integrally connected to one side of the intermediate plate body, and an outer plate body (7) integrally connected to the other opposite side of the intermediate plate body and in contact with water. The upper part of the outer plate body is provided with a grass planting inner groove (15). The left end of the intermediate plate body extends outward from the left end of the base plate body to form a transverse snap-in tenon strip (14), and the right end is recessed between the base plate body and the right end of the outer layer body to form a transverse snap-in groove (2). The transverse snap-in tenon strip (14) can be movably embedded in the transverse snap-in groove (2). The top end of the intermediate plate body is higher than the top end of the base plate body. The middle of the upper end of the intermediate plate body (13) is provided with a longitudinal upper snap-in groove I (3). The lower end of the intermediate plate body is recessed in the base plate body. A longitudinal lower snap-in groove III (8) is formed at the lower end, and a longitudinal lower snap-in tenon strip I (10) which can be movably extended into the longitudinal upper snap-in groove I (3) is arranged in the middle of the lower end of the intermediate plate body; both ends of the intermediate plate body (13) can be movably extended into the longitudinal lower snap-in groove III (8); longitudinal upper snap-in groove II (4) is arranged in the middle of the upper ends of the base plate body and the outer plate body, and longitudinal lower snap-in tenon strip II (11) which can be extended into the longitudinal upper snap-in groove II (4) is arranged in the middle of the lower ends of the base plate body and the outer plate body; the base plate body and the outer plate body are provided with lifting blind holes (6), and when the ecological snap-in bodies are mutually engaged on the slope surface of the slope protection, a stair step-like protrusion structure can be formed, and a back reinforcement guide slider (1) which is pressed into the soil is arranged on the base plate body.

3. The ecological clamping body for flood control and drainage river slope protection according to claim 2 is characterized by: The upper end of the outer plate body (7) is provided with a transition groove (5) which is smoothly connected to the longitudinal upper groove II (4) in the middle of the upper end of the outer plate body, and the lower end of the outer plate body is provided with a transition snap-joint tenon strip (9) which is smoothly connected to the longitudinal lower snap-joint tenon strip II (11) in the middle of the lower end of the outer plate body and matches the transition groove.

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