An armored reverse filtration and erosion protection reinforcement system for earth-rock embankments

Abstract

This invention discloses an armored reverse-filtration and erosion-resistant reinforcement system for earth-rock embankments, belonging to the field of flood control and disaster relief technology. It includes an inner layer of wing-connected geotextile bag reinforcement, comprising several first individual geotextile bags laid on the top and back slope of the earth-rock embankment. Multiple layers of the first individual geotextile bags are laid alternately, with wings laid below adjacent first individual geotextile bags in the same layer and column, and the wings are fixedly connected to one of the first individual geotextile bags. A surface layer of serially connected geotextile bag erosion-resistant body includes several second individual geotextile bags stacked and compressed against the outside of the inner wing-connected geotextile bag reinforcement body, with the second individual geotextile bags in the same row connected by ropes. This invention proposes a novel flood control measure for earth-rock embankments, reducing the risk of embankment breaches under floods exceeding standard levels, achieving the effect of preventing breaches even when the embankment overflows, and effectively ensuring the safety of people's lives and property.

Description

Technical Field

[0001] This invention relates to the field of flood control and disaster relief technology, and in particular to an armored reverse filtration and erosion protection reinforcement system for earth and rock embankments. Background Technology

[0002] Against the backdrop of global climate change, extreme weather events have led to more frequent, high-incidence, and severe floods exceeding standard levels.

[0003] Earth-rock dams are water-retaining structures built using local soil, stone, or a mixture of both through layered compaction and other construction methods. They are fundamental engineering facilities for water storage and flood control. As the most common dam type in my country, the safety of earth-rock dams has always been a key concern in water conservancy projects. According to statistics from domestic and international dam failure case studies, earth-rock dam failures account for over 90% of all dam failure cases. In these cases, flooding over the dam crest is the primary cause of dam collapse.

[0004] In fact, from a design and operational perspective, earth-rock dams are not allowed to operate with their tops overflowing, otherwise they are highly susceptible to dam failure. To address the risk of dam failure caused by floods exceeding standard levels and to achieve the effect of "overflowing without collapsing" for earth-rock dams, it is particularly urgent and necessary to propose an economical and effective dam flood control technology.

[0005] To address this, a type of armored reverse filtration and erosion protection reinforcement system for earth-rock embankments is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide an armored reverse filtration and erosion protection reinforcement system for earth and rock dams, aiming to solve or improve at least one of the above-mentioned technical problems.

[0007] To achieve the above objectives, the present invention provides the following solution: The present invention provides an armored reverse filtration and erosion protection reinforcement system for earth-rock dams, comprising:

[0008] The inner layer of wing-connected geotextile bag reinforcement body includes a number of first individual geotextile bags laid on the top of the earth-rock dam and the back slope of the dam. The number of first individual geotextile bags are laid in multiple layers in an alternating manner. A wing is laid under two adjacent first individual geotextile bags located in the same layer and in the same column. The wing is fixedly connected to one of the first individual geotextile bags.

[0009] The surface-layer series geotextile bag anti-erosion body includes several second individual geotextile bags that are staggered, stacked, and pressed against the outside of the inner wing-connected geotextile bag reinforcement body. Several second individual geotextile bags located in the same row are connected by ropes.

[0010] Optionally, two adjacent first single geotextile bags are staggered in both the front-to-back and left-to-right directions; two adjacent first single geotextile bags located on the same layer but in adjacent rows are staggered in the left-to-right direction.

[0011] The two adjacent second geotextile bags in adjacent rows are staggered in the left-right direction, and the second geotextile bags and the adjacent first geotextile bags are staggered in both the front-back direction and the left-right direction.

[0012] Optionally, the first single geotextile bag is filled with conventional filler material sourced locally, thereby forming a conventional geotextile bag. The conventional geotextile bag has wings fixed to opposite sides of its bottom to form a double-winged geotextile bag. The double-winged geotextile bags are located between two adjacent conventional geotextile bags in the same row, and the conventional geotextile bags are pressed on top of the wings.

[0013] Optionally, the second individual geotextile bag is filled with conventional filler material sourced locally. The top of the second individual geotextile bag is fixed with two ring buckles along the length of the bag body. Several ring buckles of several second individual geotextile bags located in the same row and in the same position are threaded onto the rope, and the two ends of the rope are tied to the ring buckles at the ends.

[0014] Optionally, the material filling part of the first single geotextile bag and part of the second single geotextile bag can be replaced with permeable filler. The first single geotextile bag and the second single geotextile bag filled with permeable filler can respectively form permeable prism geotextile bags, and a number of connected permeable prism geotextile bags can form a permeable module.

[0015] Several permeable modules are installed along the height and horizontal directions of the earth-rock embankment. Viewed from the side of the earth-rock embankment, the permeable module traverses the inner layer of wing-connected geotextile bag reinforcement and the outer layer of series-connected geotextile bag anti-erosion body. Several permeable prism geotextile bags in the permeable module are staggered in a stepped manner, and the high end of the permeable module is located on the back slope.

[0016] Optionally, viewed from the front of the earth-rock embankment, several of the permeable modules are distributed in a continuous isosceles triangular stump pattern.

[0017] Optionally, the arrangement of the permeable prism geotextile bags is related to the phreatic line, with denser arrangement below the phreatic line and sparser arrangement above the phreatic line.

[0018] Optionally, a one-way permeable geomembrane is arranged below the phreatic line on the back slope, the one-way permeable geomembrane allowing water on the back slope side to flow outward through the one-way permeable geomembrane.

[0019] Optionally, the outer contour of the surface-connected geotextile bag anti-erosion body adopts a biomimetic streamlined curve design.

[0020] The present invention discloses the following technical effects:

[0021] 1. The inner layer of wing-connected geotextile bags is laid on the top of the earth-rock dam and the back slope of the dam. The outer layer of serially connected geotextile bags is stacked and squeezed against the outside of the inner layer of wing-connected geotextile bags. This can effectively prevent the soil particles inside the dam from migrating downstream, thereby reducing the loss of soil particles in the dam.

[0022] 2. When laying the inner layer of wing-connected geotextile bags, the first geotextile bag is placed on top of the wing edge of the adjacent first geotextile bag in the same row to strengthen the connection; when laying the outer layer of series-connected geotextile bags, the connection of the second geotextile bag is strengthened by ropes, which reduces the risk of dam failure of earth-rock embankments under floods exceeding the standard, achieves the effect of "flooding without collapsing" of earth-rock embankments, and effectively ensures the safety of people's lives and property.

[0023] 3. Compared with technologies such as concrete protection, using geotextile bags in long-distance linear projects like earth-rock embankments can greatly leverage their economic advantages and significantly reduce the reinforcement costs of earth-rock embankments.

[0024] 4. Only the second individual geotextile bag on the outermost layer is connected by a rope structure, while the adjacent first individual geotextile bag on the innermost layer is connected by a wing structure. It is not necessary to use rope connections for every layer, which makes construction convenient and quick, reduces construction complexity, and improves stability. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0026] Figure 1 This is an isometric view of the present invention;

[0027] Figure 2 This is the left view of the present invention;

[0028] Figure 3 This is the front view of the present invention;

[0029] Figure 4 This is a schematic diagram illustrating the fabrication of conventional geotextile bags, double-wing geotextile bags, and inner-wing connected geotextile bags with solid screens in this invention.

[0030] Figure 5 This is a schematic diagram illustrating the fabrication of the surface-connected geotextile bag anti-erosion body in this invention;

[0031] Figure 6 This is a schematic diagram of the permeable prism geotextile bag in this invention.

[0032] In the diagram: 1. Crest of the earth-rock dam; 2. Back slope; 3. Conventional geotextile bag; 4. Permeable prismatic geotextile bag; 5. Bionic streamline; 6. Slope toe; 7. Ring buckle; 8. Rope; 9. Surface series geotextile bag anti-erosion body; 10. Double-wing geotextile bag; 11. Wing edge; 12. Inner layer wing-connected geotextile bag reinforcement body; 13. Permeable module. Detailed Implementation

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Reference Figures 1-5 This invention provides an armored reverse filtration and erosion protection reinforcement system for earth-rock embankments, comprising:

[0036] The inner layer of the wing-connected geotextile bag reinforcement body 12 includes several first individual geotextile bags laid on the top 1 and back slope 2 of the earth-rock embankment. The several first individual geotextile bags are laid in multiple layers in an alternating manner. A wing 11 is laid under two adjacent first individual geotextile bags located in the same layer and in the same column. The wing 11 is fixedly connected to one of the first individual geotextile bags.

[0037] The surface-layer series geotextile bag anti-erosion body 9 includes several second individual geotextile bags that are staggered, stacked, squeezed and attached to the outside of the inner wing-connected geotextile bag reinforcement body 12. The several second individual geotextile bags located in the same row are reinforced and connected by ropes 8.

[0038] In some alternative embodiments, two adjacent first individual geotextile bags are staggered in both the front-to-back and left-to-right directions; two adjacent first individual geotextile bags located on the same layer but in adjacent rows are staggered in the left-to-right direction.

[0039] The two adjacent second geotextile bags in adjacent rows are staggered in the left-right direction, and the second geotextile bags are staggered with the adjacent first geotextile bags in both the front-back and left-right directions.

[0040] This design ensures that adjacent geotextile bags are always staggered, allowing them to fit tightly together and increasing the tightness between geotextile bags in upper and lower layers, as well as between geotextile bags in adjacent rows.

[0041] In some alternative embodiments, the connection method of the second individual geotextile bags in the surface-layer tandem geotextile bag erosion control body 9 includes not only straight connections, but also cross connections and cross-bag connections, thereby enhancing the stability and strength of the overall structure. These connection methods allow the second individual geotextile bags to support each other in multiple directions, thereby improving their resistance to complex water flow.

[0042] In some alternative embodiments, the first individual geotextile bag is filled with conventional filler material sourced locally, thereby forming a conventional geotextile bag 3. The bottom two opposite sides of the conventional geotextile bag 3 are respectively fixed with wing edges 11 to form a double-wing geotextile bag 10. The double-wing geotextile bag 10 is located between two adjacent conventional geotextile bags 3 in the same row, and the conventional geotextile bag 3 is pressed on top of the wing edges 11.

[0043] In this embodiment, the conventional filler is a non-permeable filler that is readily available in the local construction area, thereby improving the ease of construction. The length of the wing 11 is not less than 1 / 3 of the long side of the bag body, and the width is not less than 1 / 2 of the short side of the bag body. The wing 11 is fully extended and sandwiched between the two first individual geotextile bags.

[0044] In some alternative embodiments, the second geotextile bag is filled with conventional filler material sourced locally. Two ring buckles 7 are fixed to the top of the second geotextile bag along the length of the bag body. Several ring buckles 7 located in the same row and at the same position are threaded onto a rope 8. The two ends of the rope 8 are tied to the ring buckles 7 at the ends.

[0045] In this embodiment, double rows of ring buckles 7 are sewn along the 1 / 3 and 2 / 3 points of the bag's long central axis, connecting to the bag body, to facilitate the connection of the geotextile bags with ropes 8. High-strength, wear-resistant ropes 8 are passed through the ring buckles 7 to form a surface series geotextile bag anti-erosion body 9 structure; the surface series geotextile bag anti-erosion body 9 is arranged vertically and horizontally in a staggered manner as the outermost layer of the inner wing-connected geotextile bag reinforcement body 12.

[0046] In some alternative embodiments, the material filling part of the first individual geotextile bag and part of the second individual geotextile bag is replaced with permeable filler. The first individual geotextile bag and the second individual geotextile bag filled with permeable filler are respectively formed into permeable prism geotextile bags 4, and a number of connected permeable prism geotextile bags 4 form a permeable module 13.

[0047] Several permeable modules 13 are set along the height and horizontal directions of the earth-rock embankment. When viewed from the side of the earth-rock embankment, the permeable module 13 passes through the inner layer of wing-connected geotextile bag reinforcement 12 and the surface layer of series geotextile bag anti-erosion body 9. Several permeable prism geotextile bags 4 in the permeable module 13 are staggered in a stepped manner, and the high end of the permeable module 13 is located on the back slope 2.

[0048] In some alternative embodiments, when viewed from the front of the earth-rock embankment, several permeable modules 13 are distributed in a continuous isosceles triangular stump pattern.

[0049] The permeable prism geotextile bag 4 can play a reverse filtration mechanism, which can effectively allow the seepage water inside the dam to flow out, quickly remove the water accumulated inside the dam, reduce the pore water pressure, reduce the seepage force inside the dam, and thus significantly improve the overall stability of the dam.

[0050] The installation of permeable prism geotextile bags 4 does not change the overall structure of the erosion control and reinforcement system; it simply replaces the internal filler with permeable filler. This not only prevents erosion of the dam body but also facilitates the outflow of water from inside the dam, improving the stability of the dam. The stepped, staggered distribution of the permeable prism geotextile bags 4 further facilitates the outflow of water from inside the dam.

[0051] In some alternative embodiments, the arrangement of the permeable prism geotextile bags 4 is related to the phreatic line, with denser arrangement below the phreatic line and sparser arrangement above the phreatic line. That is, denser arrangement in the lower middle part and sparser arrangement in the upper part.

[0052] Specifically, let the height of the earth-rock dam be H.

[0053] When H≤5m, the permeable prism geotextile bags 4 are arranged in 3 layers with heights of 1 / 8H, 1 / 3H and 2 / 3H respectively;

[0054] When 5m<H≤10m, the permeable prism geotextile bags 4 are arranged in 5 layers with heights of 1 / 8H, 1 / 4H, 1 / 3H, 1 / 2H, and 2 / 3H respectively;

[0055] When H > 10m, the permeable prism geotextile bags 4 are arranged in 8 layers with heights of 1 / 8H, 1 / 5H, 1 / 4H, 1 / 3H, 1 / 2H, 3 / 5H, 2 / 3H, and 4 / 5H respectively.

[0056] In some alternative embodiments, a one-way permeable geomembrane is arranged below the phreatic line of the back slope 2, allowing water on the back slope 2 to flow outward through the one-way permeable geomembrane.

[0057] This strengthens the system's anti-seepage and reverse filtration function and improves the system's water flow safety.

[0058] In some alternative embodiments, the outer contour of the surface-connected geotextile bag erosion control body 9 adopts a biomimetic streamlined type 5 curve design, and the curve should satisfy the following control equation:

[0059] y(t)=H×(1-t) 2 ×P 0y +2H×(1-t)×t×P 1y +H×t 2 ×P 2y(1)

[0060] Among them, P 0y P 1y P 2y y(t) is the vertical coordinate of the control point, t is a parameter used to define the position of any point on the curve, and its value ranges from 0 to 1. H is the height of the earth-rock embankment, and y(t) is the vertical coordinate of the curve at the parameter t.

[0061] In this implementation, along the length of the dam body, the outer contour is set as a biomimetic streamline 5 every 30 to 100m, which can effectively reduce the scouring capacity of the water flow on the reinforcement system and significantly improve the stability of the entire dam.

[0062] In some alternative embodiments, the anti-sliding stability safety factor of the earth-rock embankment slope in this reinforcement system is calculated using formula (2).

[0063]

[0064] Among them, c i It is the effective cohesion of the i-th soil strip (unit: kPa), l i W is the length of the bottom surface of the i-th soil strip in the circular arc segment (unit: m). i u is the weight (in kN) of the i-th soil strip in the circular arc segment. i Let b be the pore water pressure (in kPa) experienced by the i-th soil strip in the circular arc segment. i Let α be the width of the i-th soil strip in the circular arc segment (in meters). i Φ is the angle (in °) between the bottom surface of the i-th soil strip in the circular arc segment and the horizontal plane. i F is the effective internal friction angle of the i-th filler layer (unit: °). bag,i The anti-sliding force (in kN) provided by the i-th geotextile bag, W i ′ represents the weight of the i-th geotextile bag (in kN), μ i Let α be the coefficient of friction between the i-th geotextile bag and the soil. i ′ is the angle between the i-th geotextile bag and the sliding surface (unit: °);

[0065] When the calculated anti-sliding stability safety factor is greater than or equal to the minimum allowable value of the anti-sliding stability safety factor of the embankment slope in the specification, construction can be carried out according to the preset geotextile bag laying method.

[0066] The specific steps of this invention are as follows:

[0067] Step 1: On-site environmental investigation. Factors to be investigated include: construction conditions, permeability of dam materials, etc.

[0068] The construction conditions mainly depend on the local historical floods and the conditions of the soil and rock materials; the permeability of the dam material is mainly determined by measuring the phreatic line of the earth-rock dam.

[0069] Step 2: Select materials with a certain degree of permeability to make permeable prismatic geotextile bags 4.

[0070] Step 3: Use numerical analysis to obtain the seepage line of the earth-rock dam, and then determine the number and location of permeable prism geotextile bags 4 on the back slope 2.

[0071] Step 4: Fabrication and laying of the inner wing-connected geotextile bag reinforcement body 12. The inner wing-connected geotextile bag reinforcement body 12 is composed of conventional geotextile bags 3 and double-wing geotextile bags 10 arranged in a cross pattern. The permeable prism geotextile bags 4 are arranged and laid on the surface of the top 1, toe 6 and back slope 2 of the earth-rock embankment, according to the number and position determined in Step 3.

[0072] Step 5: Lay the second individual geotextile bag with ring buckle 7 on the outermost layer. The second individual geotextile bags are staggered and rolled on the outermost side of the inner wing-connected geotextile bag reinforcement body 12, and connected with ropes to form the surface series geotextile bag anti-erosion body 9. The surface series geotextile bag anti-erosion body 9 is arranged vertically and horizontally staggered on the inner wing-connected geotextile bag reinforcement body 12.

[0073] In particular, every 30 to 100 m, the outer contour of the surface-connected geotextile bag anti-erosion body 9 is set into the shape of a biomimetic streamline 5.

[0074] Before actual construction, the safety factor for the anti-sliding stability of the embankment slope is calculated, and the laying method of the geotextile bags is determined. When the calculated safety factor for anti-sliding stability is greater than or equal to the minimum allowable value for the safety factor for anti-sliding stability of the embankment slope in the specification, construction can proceed according to the preset geotextile bag laying method. After the geotextile bags are put into use, their performance and stability are monitored regularly, and necessary maintenance and repairs are carried out in a timely manner to ensure the long-term effectiveness of the geotextile bags.

[0075] Furthermore, in step 2, the detailed method for selecting a material with certain permeability to make the permeable prismatic geotextile bag 4 is as follows:

[0076] Step 21: Generally, locally available stone materials, such as crushed stone, angular gravel, or sand, are selected as the filling material for the permeable prism geotextile bag 4; the filling material should have good permeability and sufficient strength.

[0077] Step 22: Fabrication of the permeable prismatic geotextile bag 4. Select a suitable geotextile bag material, such as polypropylene or polyethylene woven fabric, ensuring sufficient tensile strength and durability. Cut the geotextile bag material according to the design dimensions. If the permeable prismatic geotextile bag 4 is part of the surface-layer series geotextile bag anti-erosion body 9, sew double rows of rings 7 connected to the bag body at 1 / 3 and 2 / 3 of the length of the bag body's central axis. The rings 7 are designed as semi-circles to reduce stress concentration. Ensure that the hole diameter of the rings 7 is suitable for the required rope 8, usually 1-2 cm larger than the rope 8. Finally, sew the bag opening to ensure a tight seal.

[0078] Among them, the permeable prism geotextile bag 4 is made of a material with high tensile strength and durability to ensure the durability and impact resistance of the overall structure, so as to ensure the stability and protective function of the permeable prism geotextile bag 4 under water flow load.

[0079] Step 23: Fill the selected material into the geotextile bags, ensuring even filling. Finally, sew the bag opening closed to ensure a tight seal. Lay the filled permeable prismatic geotextile bags 4 at appropriate locations on the earth-rock embankment according to system requirements.

[0080] In step 3, the specific steps for determining the phreatic line of the earth-rock dam using numerical analysis methods include:

[0081] Step 31: Model Establishment: First, a geometric model of the earth-rock dam needs to be established, including the dam body, upstream and downstream boundary conditions, and the material properties of the dam body. Based on soil test results, a suitable constitutive model (such as the Mohr-Coulomb model, Cambridge model, etc.) is selected to describe the stress-strain relationship of the soil. Soil samples are collected from the construction site for laboratory testing to determine its basic physical properties, such as dry density, moisture content, particle size distribution, permeability, compressibility, and shear strength.

[0082] Step 32: Mesh Generation: Divide the geometric model of the dam body into a finite number of mesh elements, which can be triangular or quadrilateral. Local mesh refinement is performed in areas where the seepage field changes drastically to improve computational accuracy.

[0083] Step 33: Define Material Properties: Specify the permeability and other relevant hydraulic properties of the earth-rock dam material for each element, including physical properties such as permeability, elastic modulus, Poisson's ratio, shear modulus, and bulk modulus for each element's dam material. If the dam material is heterogeneous, this heterogeneous distribution needs to be considered in the model, possibly through random generation or interpolation methods based on geological data. If the material exhibits anisotropy, anisotropic properties need to be defined in the model.

[0084] Step 34: Apply boundary conditions: Define the water level changes upstream and downstream, considering water level changes over time and possible extreme weather conditions; define the location and conditions of seepage outlets, such as drainage holes, drainage ditches, etc.; consider other boundary conditions that may affect the stability of the dam, such as earthquakes, temperature changes, construction loading, etc.

[0085] Step 35: Solve the equations using the function: Use finite element software (such as ANSYS, ABAQUS, etc.) to solve the governing equations of the seepage field. This usually involves nonlinear problems because permeability may vary with changes in hydraulic gradient or pore water pressure.

[0086] Step 36: Result Analysis: Analyze the calculation results to determine the location of the phreatic line. The phreatic line is the intersection of the free water surface and the cross-section of the dam body in the seepage field. Compare the numerical simulation results with the measured data to verify the accuracy of the model and make adjustments as needed.

[0087] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0088] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A type of armored reverse filtration and erosion protection reinforcement system for earth-rock dams, characterized in that, include: The inner layer of the wing-connected geotextile bag reinforcement body (12) includes a number of first single geotextile bags laid on the top (1) and back slope (2) of the earth-rock dam. The number of first single geotextile bags are laid in multiple layers. A wing edge (11) is laid under two adjacent first single geotextile bags in the same layer and in the same column. The wing edge (11) is fixed to one of the first single geotextile bags. The surface-layer series geotextile bag anti-erosion body (9) includes several second individual geotextile bags that are stacked and pressed together on the outside of the inner wing-connected geotextile bag reinforcement body (12) in a staggered manner. Several second individual geotextile bags located in the same row are connected by ropes (8). The first single geotextile bag is filled with conventional filler material sourced locally, thus forming a conventional geotextile bag (3). The conventional geotextile bag (3) has wings (11) fixed to its bottom sides to form a double-wing geotextile bag (10). The double-wing geotextile bag (10) is located between two adjacent conventional geotextile bags (3) in the same row, and the conventional geotextile bag (3) is pressed on the wings (11). The second single geotextile bag is filled with conventional filler material sourced locally. The top of the second single geotextile bag is fixed with two ring buckles (7) along the length of the bag body. Several ring buckles (7) of several second single geotextile bags located in the same row and in the same position are threaded onto the rope (8). The two ends of the rope (8) are tied to the ring buckles (7) at the ends. The material filling part of the first single geotextile bag and part of the second single geotextile bag is replaced with permeable filler. The first single geotextile bag and the second single geotextile bag filled with permeable filler form permeable prism geotextile bags (4), and several connected permeable prism geotextile bags (4) form a permeable module (13). The permeable module (13) is provided in several directions along the height and horizontal direction of the earth-rock embankment. From the side of the earth-rock embankment, the permeable module (13) passes through the inner wing-connected geotextile bag reinforcement body (12) and the surface series geotextile bag anti-erosion body (9). The permeable prism geotextile bags (4) in the permeable module (13) are staggered in a stepped manner, and the high end of the permeable module (13) is located on the back slope (2).

2. The armored reverse filtration and erosion protection reinforcement system for earth-rock dams according to claim 1, characterized in that: The first single geotextile bags that are adjacent to each other vertically are staggered in both the front-to-back and left-to-right directions; the first single geotextile bags that are on the same layer but on adjacent rows are staggered in the left-to-right direction. The two adjacent second geotextile bags in adjacent rows are staggered in the left-right direction, and the second geotextile bags and the adjacent first geotextile bags are staggered in both the front-back direction and the left-right direction.

3. The armored reverse filtration and erosion protection reinforcement system for earth-rock dams according to claim 1, characterized in that: Viewed from the front of the earth-rock embankment, several of the permeable modules (13) are distributed in a continuous isosceles triangular plum blossom pattern.

4. The armored reverse filtration and erosion protection reinforcement system for earth-rock dams according to claim 3, characterized in that: The arrangement of the permeable prism geotextile bags (4) is related to the saturation line, with denser arrangement below the saturation line and sparser arrangement above the saturation line.

5. The armored reverse filtration and erosion protection reinforcement system for earth-rock dams according to claim 4, characterized in that: A one-way permeable geomembrane is arranged below the saturation line of the back slope (2), which allows water on the back slope (2) to flow out through the one-way permeable geomembrane.

6. The armored reverse filtration and erosion protection reinforcement system for earth-rock dams according to claim 1, characterized in that: The outer contour of the surface-connected geotextile bag anti-erosion body (9) adopts a biomimetic streamline (5) curve design.

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