Novel flexible ecological drainage ditch structure and construction method thereof

Abstract

The invention discloses a novel flexible ecological drainage ditch structure and a construction method thereof, belongs to the technical field of drainage ditch construction, and solves the problems of serious deformation and cracking of a traditional concrete drainage ditch. The structure specifically comprises an anti-corrosion layer, a drainage layer and an anti-seepage layer. The seepage prevention layer is arranged at the bottom of the drainage ditch, the drainage layer is laid on the seepage prevention layer, and the anti-corrosion layer is laid on the drainage layer. According to the drainage ditch, the innovative design of combining the anti-corrosion layer, the drainage layer and the anti-seepage layer is adopted, so that a lower seepage body is effectively drained, the ditch body strength is improved, the basic requirements of confluence, quick drainage and seepage prevention of the drainage ditch are met, and the overall shear resistance and erosion resistance of the drainage ditch are improved; the construction method is suitable for construction of loose accumulation body slopes such as slide slag accumulation body slopes, waste slag accumulation bodies and mine dumping sites; the method has the advantages of being high in plasticity, high in terrain adaptability, high in environment flexibility, good in structure flexibility and the like.

Description

Technical Field

[0001] The invention relates to the technical field of drainage ditch construction, and in particular to a novel flexible ecological drainage ditch structure and a construction method thereof. Background Art

[0002] With the continuous development of science and technology, a series of large-scale water conservancy, hydropower, and transportation projects have been implemented and completed in recent years. The excavation of loose accumulation slopes such as downslopes, slag accumulation slopes, waste accumulation slopes, and mine spoil dumps is faced by various large-scale engineering projects. Among them, a large number of loose accumulation slopes are located in the mountainous and canyon areas of the southwest, with complex geological conditions, distinct dry and wet seasons, and concentrated and abundant rainfall. The excavation scale of the slopes in the area is large, the slope is steep, the self-stability of the slope is poor, the rear edge catchment area is large, the amount of snowmelt in some areas is large, the slope erosion is serious, the soil loss is strong, and the safety and stability issues are prominent. There are certain disaster risks when a large amount of water is discharged through slope runoff, which will not only directly affect the safety of the project construction itself, but also bring indirect impacts and disasters to the project and the human living environment through environmental disasters.

[0003] The slope structure of the loose accumulation body is mainly composed of loose rocks and slag. After excavation, the original natural cementing layer on the surface is destroyed, and the original equilibrium stress field is changed. Traditional concrete drainage ditches may cause further instability and collapse of the slope. At the same time, due to the large slope gradient, the overall stability is insufficient. The construction of traditional concrete drainage ditches is difficult, the quality of the drainage ditch is difficult to control, and deformation, cracking and other problems are prone to occur, which greatly affects the difficulty of later maintenance and the drainage effect after being put into use. At the same time, its environmental coordination is poor, and it cannot meet the requirements of ecological restoration, which is not conducive to ecological development. Therefore, the present invention provides a new flexible ecological drainage ditch structure and a construction method thereof. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a novel flexible ecological drainage ditch structure and a construction method thereof, which solves the problems of serious deformation and cracking of traditional concrete drainage ditches.

[0005] In the first aspect, in order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is:

[0006] A novel flexible ecological drainage ditch structure comprises an anti-corrosion layer, a drainage layer and a seepage-blocking layer; the seepage-blocking layer is arranged at the bottom of the drainage ditch, the drainage layer is laid on the seepage-blocking layer, and the anti-corrosion layer is laid above the drainage layer.

[0007] In this scheme, the topmost layer of the drainage ditch structure is an anti-corrosion layer, which can effectively protect the drainage ditch and avoid serious erosion by rainwater during the long-term drainage process; the drainage layer can provide support for the overall drainage ditch structure to ensure the strength of the drainage ditch structure; and improve the overall shear and erosion resistance of the drainage ditch.

[0008] Furthermore, the drainage layer includes a chain link fence, which is laid on the top of the barrier layer; a drainage matrix made of a mixture of crushed stone soil and polymer emulsion is poured inside the chain link fence.

[0009] In this solution, the chain link fence constitutes the basic framework of the drainage layer, which can improve the strength of the drainage layer and prevent it from cracking and deformation. The drainage base is prepared with crushed stone soil as raw material. The crushed stone soil can be obtained in situ at the construction site with low cost. It is also heavy, so the overall structure is relatively stable after the drainage layer is formed.

[0010] Furthermore, the seepage-blocking layer comprises a waterproof bottom layer, which is arranged at the bottom of the drainage ditch; a seepage-blocking matrix mixed with biopolymer material and non-metallic mineral powder is laid on the top of the waterproof bottom layer.

[0011] In this solution, the waterproof base layer forms a stable, non-destructible waterproof layer at the bottom of the drainage ditch.

[0012] Furthermore, the anti-corrosion layer includes an anti-corrosion matrix formed by mixing a polymer gel material and a porous material; the anti-corrosion matrix is ​​laid on the top of the drainage layer.

[0013] In this solution, the polymer gel material is mixed with the porous material, which has strong stability and enhances the stability of the slope.

[0014] In a second aspect, the present invention provides a method for constructing a novel flexible ecological drainage ditch structure based on the novel flexible ecological drainage ditch structure provided in the first aspect, comprising the following steps:

[0015] S1: Determine the size of the drainage ditch and dig the drainage ditch;

[0016] S2: pour a waterproof base layer at the bottom of the drainage ditch, and apply a seepage-blocking matrix on the top of the waterproof base layer to form a seepage-blocking layer;

[0017] S3: Laying a chain link fence on the top of the barrier layer, and pouring a drainage matrix on the chain link fence to form a drainage layer;

[0018] S4: Apply an anti-etching matrix on the top of the drainage layer to form an anti-etching layer.

[0019] In this plan, after the drainage ditch is excavated, a barrier layer, a drainage layer and a drainage layer are laid in sequence inside it, and reinforced layer by layer. The construction difficulty is small and the construction quality is easy to control.

[0020] Furthermore, in S1, the cross section of the drainage ditch is a U-shaped structure; the slope ratio of the two wings of the drainage ditch is less than or equal to 1:1.43.

[0021] Furthermore, S2 includes:

[0022] S201: Pour the biopolymer material at the bottom of the drainage ditch and compact it to form a water-proof bottom layer;

[0023] S202: uniformly mixing non-metallic mineral powder and biopolymer material at a ratio of 1 to 2:5 to obtain a permeation-barrier matrix;

[0024] S203: Apply the barrier matrix to the top of the waterproof base layer to form a barrier layer with a thickness of 3-5 cm.

[0025] Furthermore, S3 includes:

[0026] S301: crushing and screening gravel soil; mixing the gravel soil and polymer emulsion in a weight ratio of 7-8:3-2, and stirring evenly to obtain a drainage matrix;

[0027] S302: firstly applying a first layer of drainage substrate on the permeation barrier layer, and then laying the chain link fence on the first layer of drainage substrate;

[0028] S303: Use steel bars to fix the chain link fence to the original ground at the edge of the chain link fence;

[0029] S304: Apply a second layer of drainage substrate on the chain link fence, and the second layer of drainage substrate completely covers the chain link fence to form a drainage layer.

[0030] Furthermore, S4 includes:

[0031] S401: mixing the polymer gel material and the porous material uniformly to obtain an anti-corrosion matrix;

[0032] S401: Spread the anti-corrosion matrix on the drainage layer to form an anti-corrosion layer of 2-3 cm.

[0033] Furthermore, the biopolymer material is made of artemisia gum or sodium carboxymethyl cellulose; the non-metallic mineral powder is made of calcium-based bentonite, sodium-based bentonite or kaolin;

[0034] The polymer emulsion adopts epoxy resin, acrylic resin or phenolic resin.

[0035] The polymer gel material is polyurethane; the porous material is porous fiber, ceramsite or vermiculite.

[0036] In this scheme, biopolymer materials are selected from polymer materials with water absorption and expansion properties such as artemisia gum or sodium carboxymethyl cellulose, which can enhance the contact between the anti-seepage layer and the bottom of the ditch and make the drainage ditch structure more stable; porous materials are selected from expanded clay, vermiculite and other porous materials with closed pore structure and certain strength. After mixing with polymer gel materials, the contact area is large and the combination is tighter, forming a dense anti-corrosion layer.

[0037] The beneficial effects of the present invention are:

[0038] The novel flexible ecological drainage ditch structure provided by the present invention is suitable for the construction on the slopes of loose accumulation bodies such as slag accumulation bodies, waste slag accumulation bodies and mine spoil dumps; the drainage ditch structure adopts an innovative design combining an anti-corrosion layer, a drainage layer and a seepage-proof layer to effectively drain the infiltrated water and increase the strength of the ditch, which not only meets the basic requirements of drainage ditch confluence, fast drainage and anti-seepage, but also improves the overall shear and erosion resistance of the drainage ditch, providing sufficient water for the growth of vegetation around the drainage ditch. By adopting the theory of combining material anti-corrosion and anti-seepage with gravel water conduction and fine-grained anti-seepage, and using ecological and environmentally friendly materials and on-site crushed stone soil as raw materials, a drainage channel for the slope of loose accumulation body is formed, which enhances the stability of the overall slope and constructs a flexible ecological drainage facility with ecological flexibility and benign cycle drainage. The ecological drainage facility has the advantages of strong plasticity, high terrain adaptability, strong environmental flexibility and good structural flexibility. It effectively overcomes the problems of difficult construction of traditional drainage ditches in the slope of loose accumulation body, difficult quality control, easy deformation and cracking, as well as the problem of drainage ditch failure due to slope water surface runoff caused by terrain or heavy rainfall. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic structural diagram of a novel flexible ecological drainage ditch structure of the present invention;

[0040] Figure 2 for Figure 1 Middle partial enlarged picture;

[0041] Figure 3 This is a schematic diagram of constructing a new flexible ecological drainage ditch structure under complex terrain and steep slope scenarios in Example 3;

[0042] Figure 4 It is a schematic diagram of the novel flexible ecological drainage ditch structure in Example 4;

[0043] Figure 5 for Figure 4 A partial enlarged view of .

[0044] Reference numerals:

[0045] 1. Anti-corrosion layer; 2. Drainage layer; 21. Chain link fence; 3. Permeation barrier layer; DETAILED DESCRIPTION

[0046] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. The specific implementation of the present invention is described below to facilitate the understanding of the present invention by those skilled in the art, but it should be clear that the present invention is not limited to the scope of the specific implementation. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention defined and determined by the attached claims, these changes are obvious, and all inventions and creations using the concept of the present invention are protected.

[0047] Example 1

[0048] like Figure 1 As shown, this embodiment provides a new flexible ecological drainage ditch structure; the ecological drainage facility has the characteristics of strong plasticity, high terrain adaptability and good structural flexibility, and is suitable for constructing drainage on the slope of loose accumulation bodies; it specifically includes:

[0049] Anti-corrosion layer 1, drainage layer 2 and barrier layer 3;

[0050] Among them, the anti-seepage layer 3 is arranged at the bottom of the drainage ditch and is in close contact with the bottom of the ditch; the drainage layer 2 is laid on the anti-seepage layer 3, and the drainage layer 2 provides strength support for the entire drainage ditch structure; the anti-corrosion layer 1 is laid above the drainage layer 2; the anti-corrosion layer 1 has strong anti-corrosion ability.

[0051] like Figure 2 As shown, the drainage layer 2 includes a chain link fence 21, which is laid on the top of the barrier layer 3; a drainage matrix made of crushed stone soil and polymer emulsion is poured inside the chain link fence 21. The chain link fence 21 constitutes the basic framework of the drainage layer 2, which can improve the strength of the drainage layer 2 and prevent it from cracking and deformation; the drainage matrix is ​​prepared with crushed stone soil as raw material, which can be obtained in situ at the construction site, with low cost; and the crushed stone soil is heavy, so the drainage layer 2 is relatively stable after being formed. The overall thickness of the drainage layer 2 is 5-10 cm.

[0052] The chain link fence 21 is a galvanized chain link fence 21 with a mesh diameter of 2 mm and a mesh size of 50×50 mm; the crushed stone soil can be obtained by crushing and screening on site.

[0053] The seepage-blocking layer 3 includes a water-blocking bottom layer, which is arranged at the bottom of the drainage ditch to form a stable and indestructible water-blocking layer; a seepage-blocking matrix mixed with biopolymer materials and non-metallic mineral powder is laid on the top of the water-blocking bottom layer. The thickness of the whole seepage-blocking layer is 3-5 cm.

[0054] The anti-corrosion layer 1 includes an anti-corrosion matrix mixed with a polymer gel material and a porous material; the anti-corrosion matrix is ​​laid on the top of the drainage layer 2; the polymer gel material and the porous material are mixed, and the stability is strong, which enhances the stability of the slope. The overall thickness of the anti-corrosion layer 1 is 2-3 cm.

[0055] Example 2

[0056] This embodiment provides a method for constructing a new flexible ecological drainage ditch structure based on a new flexible ecological drainage ditch structure provided in Embodiment 1, comprising the following steps:

[0057] S1: Determine the size of the drainage ditch and excavate the drainage ditch; the cross-section of the drainage ditch is a U-shaped structure; the slope ratio of the two wings of the drainage ditch is less than or equal to 1:1.43.

[0058] S2: pouring a waterproof bottom layer at the bottom of the drainage ditch, and applying a seepage-blocking matrix on the top of the waterproof bottom layer to form a seepage-blocking layer 3; specifically comprising:

[0059] S201: Pour the biopolymer material at the bottom of the drainage ditch and compact it to form a water-proof bottom layer;

[0060] S202: uniformly mixing non-metallic mineral powder and biopolymer material at a ratio of 1 to 2:5 to obtain a permeation-barrier matrix;

[0061] S203: Apply the barrier matrix to the top of the waterproof base layer to form a barrier layer 3 with a thickness of 3-5 cm.

[0062] S3: laying a chain link fence 21 on the top of the barrier layer 3, and pouring a drainage matrix on the chain link fence 21 to form a drainage layer 2; specifically comprising:

[0063] S301: crushing and screening gravel soil; mixing the gravel soil and polymer emulsion in a weight ratio of 7-8:3-2, and stirring evenly to obtain a drainage matrix;

[0064] S302: firstly apply a first layer of drainage substrate on the barrier layer 3, and then lay the chain link fence 21 on the first layer of drainage substrate;

[0065] S303: fixing the chain link fence 21 to the original stratum at the edge of the chain link fence 21 using steel bars;

[0066] S304: applying a second drainage matrix on the chain link fence 21, the second drainage matrix completely covers the chain link fence 21, and forms a drainage layer 2.

[0067] S4: applying an anti-corrosion matrix on the top of the drainage layer 2 to form an anti-corrosion layer 1; specifically comprising:

[0068] S401: mixing the polymer gel material and the porous material uniformly to obtain an anti-corrosion matrix;

[0069] S401: Spread the anti-corrosion matrix on the drainage layer 2 to form an anti-corrosion layer 1 of 2-3 cm.

[0070] In this embodiment, the biopolymer material is a polymer material with water absorption and expansion such as artemisia gum or sodium carboxymethyl cellulose; the non-metallic mineral powder is calcium-based bentonite, sodium-based bentonite or kaolin; the polymer emulsion is epoxy resin, acrylic resin or phenolic resin; the polymer gel material is polyurethane; the porous material is porous fiber, expanded clay, vermiculite and other porous materials with closed pore structure and certain strength. After mixing with the polymer gel material, the contact area is large and the combination is tighter to form a dense anti-corrosion layer 1.

[0071] Example 3

[0072] like Figure 1-Figure 3 As shown, this embodiment provides a method for constructing a new flexible ecological drainage ditch structure in complex terrain and steep slope scenarios based on a method for constructing a new flexible ecological drainage ditch structure provided in Example 2;

[0073] The following steps are involved:

[0074] S1: Determine the size of the drainage ditch and dig the drainage ditch;

[0075] Before construction, the size of the drainage ditch is determined according to the calculation results of the surface water flow rate. The bottom width is 50 cm and the height is 50 cm. The flexible drainage ditch adopts a U-shaped arc section, and the slope ratio of the two wings of the drainage ditch is 1:1.43; clean the construction area to ensure that there is no debris and garbage, prepare necessary tools and equipment, and ensure their normal operation to avoid affecting the construction; after excavation, clean the debris inside the drainage ditch to ensure that the drainage ditch is flat and has good drainage capacity without affecting subsequent construction.

[0076] S2: construct the barrier layer 3;

[0077] The construction site requires a suitable construction environment. Check the weather conditions on site. If bad weather occurs, postpone the construction. While pouring the biopolymer material, compact the inside of the drainage ditch to form a stable, indestructible waterproof bottom layer in the ditch. Then, evenly apply the impermeability layer 3 composed of non-metallic mineral powder and biopolymer material in a ratio of 2:5 to the inside of the excavated ditch to form a 3cm impermeability layer 3.

[0078] S3: laying drainage layer 2;

[0079] After the construction of the barrier layer 3 is completed, the crushed stone soil screened on site is mixed with the polymer emulsion in a ratio of 7:3. The order should be paid attention to when adding the materials. The crushed stone soil is added first to ensure that it is fully stirred and mixed evenly to avoid caking, and it is evenly applied on the barrier layer 3; the chain link fence 21 is laid. When laying, ensure that the mesh surface is installed flat without obvious warping and unevenness. Adjacent chain link fences 21 are connected by 75cm long φ12U-type steel bars, and the spacing between steel bars is about 2m; after laying, the mixture is used to smooth the surface to form a 5cm drainage layer 2.

[0080] S4: Laying the anti-corrosion layer 1;

[0081] After the drainage layer 2 is completely solidified, a polymer gel material with a concentration of 1% is mixed with a porous material (particle size ≤ 1 cm), spread on the drainage layer 2, and the surface is smoothed to form a 2 cm anti-corrosion layer 1.

[0082] S5: Use geononwovens for protection;

[0083] After the drainage ditch is constructed, use geotextiles to cover and protect it. Lay the geotextiles in the drainage ditch. Before laying, confirm the correct direction and try to avoid excessive bending to avoid affecting the overall effect. Lay it loosely in a wavy manner and flatten it in time after laying. The geotextiles should be pulled open to completely cover the ditch surface and fit it flat. Construction workers should pay attention to their clothing and behavior to avoid damaging the geotextiles. If the geotextiles are found to be damaged during construction, corresponding treatment measures should be taken in time. During the laying process, pay attention to the integrity of the edges of the non-woven fabrics. If there are loose areas, use heavy objects to compact them.

[0084] The total length of the flexible drainage ditch constructed in this embodiment is about 130m; the non-metallic mineral powder adopts calcium-based bentonite 9.2m 3 The biopolymer material uses 156kg of polyvinyl alcohol material, the polymer emulsion uses 4500kg of epoxy resin, and the porous material uses 144kg of porous fiber material.

[0085] Example 4

[0086] like Figure 4 and Figure 5 As shown, this embodiment provides a method for constructing a new flexible ecological drainage ditch structure in a flat terrain and a gentle slope scene based on a method for constructing a new flexible ecological drainage ditch structure provided in Example 2, including the following steps:

[0087] S1: Determine the size of the drainage ditch and dig the drainage ditch;

[0088] Before construction, the size of the drainage ditch is determined according to the calculation results of the surface water flow rate. The bottom width is 50 cm and the height is 50 cm. The flexible drainage ditch adopts a U-shaped arc section, and the slope ratio of the two wings of the drainage ditch is 1:1; clean the construction area to ensure that there is no debris and garbage, prepare necessary tools and equipment, and ensure their normal operation to avoid affecting the construction; after excavation, clean the debris inside the drainage ditch to ensure that the drainage ditch is flat and has good drainage capacity without affecting subsequent construction.

[0089] S2: construct the barrier layer 3;

[0090] The construction site requires a suitable construction environment, and the weather conditions on site should be checked. If bad weather occurs, the construction will be postponed. While pouring the biopolymer material, compact the inside of the drainage ditch to form a stable, indestructible waterproof bottom layer in the ditch. Then, evenly apply the seepage-proof layer 3 composed of a mixture of non-metallic mineral powder and biopolymer material in a ratio of 1:5 to the inside of the excavated ditch to form a 3 cm seepage-proof layer 3.

[0091] S3: laying drainage layer 2;

[0092] After the construction of the barrier layer 3 is completed, the crushed stone soil screened on site is mixed with the polymer emulsion in a ratio of 8:2. The order should be paid attention to when adding the materials. The crushed stone soil is added first to ensure that it is fully stirred and mixed evenly to avoid caking, and it is evenly applied on the barrier layer 3; the chain link fence 21 is laid. When laying, ensure that the mesh surface is installed flat without obvious warping and unevenness. The connection is anchored with 75cm long φ12U-type steel bars, and the spacing between steel bars is about 1m; after laying, the mixture is used to smooth the surface to form a 10cm drainage layer 2.

[0093] S4: Laying the anti-corrosion layer 1;

[0094] After the drainage layer 2 is completely solidified, a polymer gel material with a concentration of 1% is mixed with a porous material, spread on the drainage layer 2, and the surface is smoothed to form a 4 cm anti-corrosion layer 1.

[0095] S5: Use geononwovens for protection;

[0096] After the drainage ditch is constructed, use geotextiles to cover and protect it. Lay the geotextiles in the drainage ditch. Before laying, confirm the correct direction and try to avoid excessive bending to avoid affecting the overall effect. Lay it loosely in a wavy manner and flatten it in time after laying. The geotextiles should be pulled open to completely cover the ditch surface and fit it flat. Construction workers should pay attention to their clothing and behavior to avoid damaging the geotextiles. If the geotextiles are found to be damaged during construction, corresponding treatment measures should be taken in time. During the laying process, pay attention to the integrity of the edges of the non-woven fabrics. If there are loose areas, use heavy objects to compact them.

[0097] The total length of the flexible drainage ditch constructed in this embodiment is about 200m, and the non-metallic mineral powder is sodium bentonite 1.5m 3 , the polymer gel material uses 360kg of polyurethane material, the polymer emulsion uses 600kg of epoxy resin, and the porous material uses 8m of ceramsite 3 , the biopolymer material uses 240kg of sodium carboxymethyl cellulose.

[0098] Those skilled in the art will appreciate that the embodiments herein are intended to help readers understand the principles of the present invention, and should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific variations and combinations that do not deviate from the essence of the present invention based on the technical revelations disclosed by the present invention, and these variations and combinations are still within the protection scope of the invention.

Claims

1. A new type of flexible ecological drainage ditch structure, characterized by: It comprises an anti-corrosion layer (1), a drainage layer (2) and a permeation barrier layer (3); the permeation barrier layer (3) is arranged at the bottom of the drainage ditch, the drainage layer (2) is laid on the permeation barrier layer (3), and the anti-corrosion layer (1) is laid on the drainage layer (2).

2. The novel flexible ecological drainage ditch structure according to claim 1 is characterized by: The drainage layer (2) comprises a chain link fence (21), and the chain link fence (21) is laid on the top of the barrier layer (3); a drainage matrix made of a mixture of crushed stone soil and polymer emulsion is poured inside the chain link fence (21).

3. The novel flexible ecological drainage ditch structure according to claim 1 is characterized by: The permeability-barrier layer (3) comprises a waterproof bottom layer, which is arranged at the bottom of the drainage ditch; a permeability-barrier matrix mixed with biopolymer material and non-metallic mineral powder is laid on the top of the waterproof bottom layer.

4. The novel flexible ecological drainage ditch structure according to claim 1 is characterized by: The anti-corrosion layer (1) comprises an anti-corrosion matrix formed by mixing a polymer gel material and a porous material; the anti-corrosion matrix is ​​laid on the top of the drainage layer (2).

5. A method for constructing a new flexible ecological drainage ditch structure according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1: Determine the size of the drainage ditch and dig the drainage ditch; S2: pouring a waterproof base layer at the bottom of the drainage ditch, and applying a seepage-blocking matrix on the top of the waterproof base layer to form a seepage-blocking layer (3); S3: laying a chain link fence (21) on the top of the barrier layer (3), and pouring a drainage matrix on the chain link fence (21) to form a drainage layer (2); S4: Apply an anti-etching matrix on the top of the drainage layer (2) to form an anti-etching layer (1).

6. The construction method of the new flexible ecological drainage ditch structure according to claim 5 is characterized in that; In S1, the cross section of the drainage ditch is a U-shaped structure; the slope ratio of the two wings of the drainage ditch is less than or equal to 1:1.

43.

7. The method for constructing a novel flexible ecological drainage ditch structure according to claim 6 is characterized in that: The S2 includes: S201: Pour the biopolymer material at the bottom of the drainage ditch and compact it to form a water-proof bottom layer; S202: uniformly mixing non-metallic mineral powder and biopolymer material at a ratio of 1 to 2:5 to obtain a permeation-barrier matrix; S203: Apply the barrier matrix to the top of the waterproof base layer to form a barrier layer (3) with a thickness of 3-5 cm.

8. The method for constructing a novel flexible ecological drainage ditch structure according to claim 7 is characterized in that: The S3 includes: S301: crushing and screening gravel soil; mixing the gravel soil and polymer emulsion in a weight ratio of 7-8:3-2, and stirring evenly to obtain a drainage matrix; S302: firstly applying a first layer of drainage substrate on the permeation barrier layer (3), and then laying a chain link fence (21) on the first layer of drainage substrate; S303: fixing the chain link fence (21) to the original stratum at the edge of the chain link fence (21) using steel bars; S304: Apply a second layer of drainage matrix onto the chain link fence (21), so that the second layer of drainage matrix completely covers the chain link fence (21) to form a drainage layer (2).

9. The method for constructing a novel flexible ecological drainage ditch structure according to claim 8, characterized in that: The S4 includes: S401: mixing the polymer gel material and the porous material uniformly to obtain an anti-corrosion matrix; S401: Spread the anti-corrosion matrix on the drainage layer (2) to form an anti-corrosion layer (1) of 2-3 cm.

10. The method for constructing a novel flexible ecological drainage ditch structure according to claim 9 is characterized in that: The biopolymer material is artemisia gum or sodium carboxymethyl cellulose; the non-metallic mineral powder is calcium-based bentonite, sodium-based bentonite or kaolin; The polymer emulsion is epoxy resin, acrylic resin or phenolic resin; The polymer gel material is polyurethane; the porous material is porous fiber, ceramsite or vermiculite.

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