Composite flexible material torrent chute and construction method

Abstract

The invention discloses a composite flexible material torrent chute and a construction method, and belongs to the technical field of road slope drainage. The torrent groove comprises an integrated groove body formed by on-site hydration and curing of a flexible composite material, integrated anti-scouring flanges horizontally extending outwards are arranged at the tops of the two sides of the groove body, and a grading anti-skid table integrally formed with the groove body is arranged at the bottom of the groove. The flexible composite material is a multi-layer composite blanket material and comprises a wear-resistant protection layer, a core function layer and an anti-seepage isolation layer from top to bottom. The construction method comprises the steps of foundation trench excavation and treatment, flexible composite material laying and forming, anti-skid table preparation, anchoring, watering activation curing, joint sealing and the like. Through the integrated design of materials, the structure and the technology, rapid chute construction convenience, structure integration and connection reliability are achieved, the long-term durability and environmental adaptability are improved, the whole life cycle cost is reduced, and the rapid chute is suitable for various road slope drainage projects.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of highway slope drainage engineering, in particular to a composite flexible material gutter and a construction method. BACKGROUND

[0002] The gutter is the core component of the highway slope drainage system, and is mainly used for quickly draining the rainwater on the slope surface to avoid the rainwater from washing the slope soil and guaranteeing the overall stability of the roadbed and the slope. At present, the gutter in the highway slope drainage system is mostly made by assembling prefabricated concrete blocks or pouring concrete on site. Although this kind of process is widely used, it has many technical defects that are difficult to overcome in the actual engineering construction and long-term use, which are as follows. 1. Low construction efficiency and poor quality controllability: the traditional concrete gutter construction process is complicated, especially the cast-in-place concrete process, which has high requirements for site vibration and formwork support, and has a long construction period. Incomplete vibration can easily cause internal defects such as honeycomb, pitted surface, and holes in the gutter body. The leakage of formwork and the deformation of formwork can cause rough structure surface, missing edges and corners, and seriously affect the appearance quality and internal durability of the gutter body. The prefabricated concrete block assembly also needs complicated hoisting and splicing procedures, and the construction efficiency is difficult to improve.

[0003] 2. Weak structure connection and insufficient integrity: the prefabricated concrete blocks are only connected by cement mortar, and the connection strength is low. Under the action of long-term water flow scouring, seasonal frost heaving or uneven settlement of the foundation, the splicing part is prone to dislocation and cracking, forming a leakage channel. The "water channeling" phenomenon caused by leakage not only weakens the drainage function, but also hollows out the back of the gutter body and the foundation soil, and enlarges the water damage risk. At the same time, the size of the excavated trench is larger than that of the prefabricated component, and a weak gap is formed between the trench wall and the soil foundation, which is difficult to compact and fill, further aggravating the water flow scouring risk.

[0004] 3. Poor long-term durability and environmental adaptability: concrete materials are sensitive to changes in environmental temperature and humidity. Under the action of roadbed settlement, dry shrinkage and frost heaving cyclic stress, the prefabricated or cast-in-place gutter body is prone to cracking, accelerating material degradation. Due to transportation and hoisting restrictions, the length of the prefabricated segment is limited, and a large number of site splices become weak links in the structure. If the expansion joint or waterproof treatment is not proper, it is easy to cause leakage damage and lead to failure of the overall drainage function.

[0005] In summary, the traditional concrete gutter has systematic deficiencies in construction convenience, structural integrity, connection reliability and long-term durability, and cannot meet the efficient, reliable and long-life drainage requirements in modern highway construction. Therefore, an innovative material and method are needed to fundamentally improve it. SUMMARY

[0006] This invention addresses the problems of low construction efficiency, poor structural integrity, unreliable connections, and insufficient durability of traditional concrete drainage channels in the prior art. It provides a composite flexible material drainage channel and construction method. Through material innovation and construction method reform, the drainage channel achieves convenient construction, structural integrity, reliable connections, and durable use, thereby improving the stability and service life of highway slope drainage systems and reducing the total life cycle cost.

[0007] The objective of this invention is primarily achieved through the following approach: A composite flexible material rapid flow channel includes an integrated channel body, anti-scour flanges, and anti-slip platforms. The integrated channel body is formed by on-site hydration and curing of flexible composite materials. The integrated channel body includes a channel bottom and two symmetrically arranged channel walls. The anti-scour flanges are located at the top of the two channel walls and extend horizontally outward with an extension width of not less than 20 cm. The anti-slip platforms are arranged perpendicular to the water flow direction at the bottom of the channel body and are integrally formed with the channel body. The number of platforms is determined according to the embankment fill height H of the slope where the rapid flow channel is located.

[0008] Furthermore, the flexible composite material is a prefabricated multi-layer composite blanket material with intelligent characteristics of dry flexibility and wet rigidity. From top to bottom, it includes a wear-resistant protective layer, a core functional layer, and a seepage-proof isolation layer. The wear-resistant protective layer is a fiber woven layer that forms a highly wear-resistant surface after curing, resisting the erosion and wear of water flow, silt, and gravel. The core functional layer includes a three-dimensional mesh skeleton formed by three-dimensionally randomly distributed short chopped fibers, and dry-mixed cement-based composite material powder filling the pores of the skeleton. The short chopped fibers can be polyvinyl alcohol (PVA) fibers or polypropylene (PP) fibers. The dry-mixed cement-based composite material powder includes cement, active mineral admixtures, graded fine aggregates, and special additives for setting, toughening, and impermeability. The active mineral admixtures can be silica fume or fly ash. The seepage-proof isolation layer is a dense polymer film (such as polyethylene PE film) or high-density fiber nonwoven fabric. When laid, it adheres tightly to the foundation, which can prevent the rapid loss of moisture in the early stage of hydration and form an additional seepage barrier after curing.

[0009] Furthermore, the dimensions of a single roll of the flexible composite material can be designed to be 170cm long and 100cm wide, with an initial thickness of approximately 2cm in the unhydrated state, which can be adjusted to 3cm according to the design water flow rate, impact and wear resistance level, and foundation conditions.

[0010] Furthermore, the anti-slip platform has a trapezoidal or arc-shaped cross-section, a height of 10-15cm, and a width that is the same as or slightly wider than the bottom of the trough. It can resist the sliding force of the trough and water on steep slopes, and also act as an energy dissipator to reduce the water flow velocity and reduce the scouring of the trough bottom. The number of anti-slip platforms is set according to the roadbed fill height H, specifically: 1 platform when H<4m, 2 platforms when 4m≤H<6m, 3 platforms when 6m≤H<8m, 4 platforms when 8m≤H<10m, and 5 platforms when H≥10m. Anti-slip platforms are added at key locations on ultra-long slopes or extremely steep slopes to ensure that the anti-slip effect is adapted to the actual working conditions of the slope.

[0011] Furthermore, the rapid flow channel also includes a systematic mechanical anchoring system, using U-shaped steel bars made of high-strength low-carbon steel wire or corrosion-resistant alloy steel with a diameter of Φ5mm as anchors. For hard foundations, expansion bolts or chemical anchors of the same specification can be used. The anchors are arranged according to differentiated standards, with three-point anchoring at the joints, continuous anchoring at the outer edge of the flange, and denser anchoring at key parts to ensure a reliable connection between the channel and the foundation, preventing slippage, warping, and damage from water flow buoyancy.

[0012] Correspondingly, the present invention also provides a construction method for a composite flexible material rapid flow channel, comprising the following steps: S1: Foundation trench excavation and foundation treatment: Excavate precisely according to the design cross section to ensure a smooth slope at the bottom of the trench and a flat and firm excavation surface; treat the foundation according to its type: Class I foundations can be used directly, Class II foundations are compacted, and Class III foundations are replaced with a cushion layer and geogrids can be added to eliminate the risk of uneven settlement of the foundation.

[0013] S2: Flexible composite material laying and tank prototype forming: Lay materials in a reasonable order, following the principle of laying materials from bottom to top, then from the wall, to ensure close contact with the base surface; longitudinal overlap adopts the upper pressure and lower flow direction, with an overlap width of not less than 10cm, and the overlap interface is pre-wetted or coated with polymer cement slurry to enhance the bond, and the two sides extend to form anti-scour flanges.

[0014] S3: Preparation of the anti-slip table prototype: Prepare the anti-slip table prototype by folding and stacking materials or using molds to form a thickened body at the planned location, ensuring integration with the tank body.

[0015] S4: Mechanical anchoring: Anchor key parts such as flanges, joints, and anti-slip platform perimeter according to the layout standards to ensure that the anchors are firmly installed and the force is evenly distributed.

[0016] S5: Watering activation and moisturizing maintenance: Water in two applications using a fine-nozzle spray method to ensure full-thickness activation of the material. After watering, press out air bubbles and cover for moisturizing maintenance for no less than 24 hours to ensure full hydration and strength development of the material.

[0017] S6: Joint sealing and surface reinforcement: The joints are sealed to form a reinforced sealing strip, and wear-resistant coatings are added to special sections to further improve impermeability and impact resistance.

[0018] In summary, compared with the prior art, the present invention has the following beneficial technical effects: (1) The present invention significantly improves construction efficiency and has strong quality control. The flexible composite material can be rolled and folded in the dry state, and is convenient for storage, transportation and handling. It does not require complicated template support and vibration process. It can be cured and formed by watering after on-site laying. The construction cycle is shortened by more than 60% compared with the traditional process. The material hydration and curing process is controllable, avoiding defects such as honeycomb and pitting that are easy to be generated by traditional concrete process. The structural quality is uniform and stable. (2) The overall structure and connection reliability of the present invention are significantly enhanced. The flexible composite material is integrally cured and molded on site. There are no seams between the tank, the anti-scour flange and the anti-slip platform, which completely eliminates the leakage risk of traditional splicing seams. The longitudinal overlap adopts the design of upper pressure and lower flow, combined with interface reinforcement treatment and systematic anchoring, which effectively prevents water from seeping in the opposite direction and joint misalignment. The tank is in close contact with the foundation surface and there are no weak gaps. The resistance to water seepage and scour is greatly improved. (3) The present invention has excellent durability and environmental adaptability. After curing, the flexible composite material forms a high-strength, high-impermeability, and high-toughness fiber-reinforced cement-based composite material layer. The three-dimensional fiber skeleton can bridge microcracks and adapt to small deformations of the foundation without brittle cracking. The material has excellent freeze-thaw resistance, chemical corrosion resistance and UV aging resistance. It can be used for a long time in harsh outdoor environments and its service life is 3-5 times longer than that of traditional concrete chutes. (4) This invention is energy-saving and environmentally friendly with low overall cost. The materials can be prefabricated, with little loss during transportation. There is no dust or noise pollution during construction. It is biodegradable after disposal, which is in line with the concept of green highway construction. The construction efficiency is high, the amount of manpower is small, and there is no need for frequent maintenance in the later stage. The total life cycle cost is more than 40% lower than that of traditional rapid flow channels. (5) The present invention has strong terrain adaptability. The flexible composite material is soft in dry state and can flexibly fit the uneven slope terrain. It is suitable for highway slopes with various slopes and geological conditions. It is especially suitable for on-site construction in complex terrain. There is no need to carry out large-scale leveling treatment on the slope. The construction flexibility is significantly better than that of traditional rigid chutes. Attached Figure Description

[0019] Fig. 1 This is a schematic diagram of the structure of the present invention; Fig. 2 This is a schematic diagram of the anti-slip platform in this invention; Fig. 3 This is a schematic diagram of the overlapping structure of the present invention.

[0020] Reference numerals: 1-bottom of the tank, 2-tank wall, 3-anti-erosion flange, 4-anti-slip platform, 5-anti-slip fold. Detailed Implementation

[0021] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of the present invention is not limited to the following embodiments, and any modifications and / or alterations made to the present invention will fall within the protection scope of the present invention.

[0022] Example 1: A composite flexible material rapid flow channel like Figs. 1-3 As shown in the figure, this embodiment provides a composite flexible material rapid flow channel, which is applied to a highway slope drainage project with a roadbed fill height H=5m. The specific structure is as follows: Flexible composite material: It adopts prefabricated multi-layer composite blanket material, with dimensions of 170cm in length, 100cm in width, and 2cm in thickness in the unhydrated state; from top to bottom, it consists of a wear-resistant protective layer (polypropylene fiber woven layer), a core functional layer (three-dimensional randomly distributed PVA chopped fiber skeleton, filled with dry-mixed powder composed of cement, silica fume, graded fine aggregate, and accelerator and anti-permeability additives), and an anti-permeability isolation layer (polyethylene PE film); the material retains plasticity for 2 hours after contact with water, reaches more than 80% of the final compressive strength within 24 hours, and after curing, the compressive strength reaches the C30 concrete grade and the impermeability grade reaches P8.

[0023] The core functional layer is the core load-bearing structure of the material, specifically composed of a three-dimensional randomly distributed chopped fiber skeleton, dry-mixed cement-based powder material, and auxiliary binding components. The chopped fiber skeleton is made of polyvinyl alcohol (PVA) fibers or polypropylene (PP) fibers, using fibers 6-12 mm in length and 10-20 μm in diameter, uniformly dispersed in a three-dimensional random orientation to form a three-dimensional network structure. The skeleton porosity is controlled at 30%-40% to enhance the toughness and crack resistance of the core functional layer. The dry-mixed cement-based powder material fills the pores of the fiber skeleton, using ordinary Portland cement (P·O2). The base material is 42.5 grade, accounting for 60%-70% of the total mass of dry-mixed powder. 8%-12% silica fume (or 15%-25% fly ash) is added as an active mineral admixture, along with 20%-25% quartz sand with a particle size of 0.15-0.6mm as graded fine aggregate. 1%-2% accelerator, 0.5%-1% toughening agent, and 2%-3% impermeable agent are added as special additives to ensure that the material can be bent and rolled in a dry state, maintains flexibility for 2 hours after contact with water, and reaches more than 80% of the final compressive strength within 24 hours. A small amount of water-soluble polymer binder is selected as the auxiliary binding component, with a dosage of 0.3%-0.5% of the total mass of dry-mixed powder, to enhance the adhesion between fibers and powder and prevent powder from falling off during transportation and laying.

[0024] Integrated tank: The tank is formed by on-site hydration and curing of the above-mentioned flexible composite material. The cross-section of the tank is trapezoidal, with a bottom width of 50cm and a depth of 40cm. The tank wall 2 and the tank bottom 1 are integrally formed, and the surface is flat and smooth.

[0025] Anti-scour flange 3: Set on the top of the two sides of the tank wall 2, extending horizontally outward by 20cm, integrally formed with the tank body, laid and anchored to the slope surface, eliminating the starting point of scour at the edge of the tank opening, and the two sides are provided with downward bending anti-slip folds 5 extending outward.

[0026] Anti-slip platform 4: Based on the roadbed fill height H=5m (4m≤H<6m), two anti-slip platforms 4 are set up and evenly distributed along the slope; the cross-section of the anti-slip platform 4 is trapezoidal, with a height of 12cm and a width of the same as the bottom of the trench 1 (50cm), and is integrally formed with the trench body, which has both anti-slip and energy dissipation functions.

[0027] Mechanical anchoring system: U-shaped steel bars made of high-strength low-carbon steel wire with a diameter of Φ5mm are used as anchors, with a length of 30cm; one U-shaped steel bar is arranged at the center line of the longitudinal lap joint and at each of the two side edges to form a three-point anchoring; U-shaped steel bars are continuously arranged at a spacing of 40cm on the outer edge of the anti-scour flange 3; U-shaped steel bars are densely arranged at a spacing of 20cm on the front and rear sides of the anti-slip platform 4 and at the top and bottom of the rapid flow channel. All U-shaped steel bars are driven into the soil foundation perpendicular to the slope surface to ensure firm anchoring.

[0028] Joint sealing: The longitudinal overlap joint is 10cm wide. Before overlapping, apply special polymer cement slurry to the overlap area of ​​the lower material. After overlapping, press flexible waterproof sealant into the joint surface to form a 6cm wide reinforced sealing strip.

[0029] Example 2: Construction method of a composite flexible material rapid flow channel This embodiment corresponds to the rapid flow channel in Embodiment 1, and provides its construction method. The specific steps are as follows: S1: Excavation and foundation treatment of the foundation trench: The foundation of this slope is a Class II foundation (general backfill soil). It is precisely excavated according to the design trapezoidal cross section (bottom width 50cm, depth 40cm, slope ratio 1:0.5). Excavators are used in conjunction with manual trimming to ensure that the longitudinal slope of the trench bottom 1 is smooth (slope 1:3) without abrupt changes, and the excavation surface is smooth and firm. After the excavation is completed, a light road roller is used to compact the trench bottom 1 and the trench wall 2, and the compaction degree reaches more than 93%. Sharp protrusions on the surface are leveled and loose soil and debris are removed.

[0030] S2: Flexible composite material laying and initial tank formation: Check the integrity of the flexible composite material, ensuring there is no damage or fiber scattering. Plan the laying sequence from the foot of the slope to the top, calculate the material usage, and reserve 5% for overlap and loss. Following the order of bottom to wall and from bottom to top, lay the flexible composite material flat on the bottom of the tank 1, then wrap it around the tank wall 2. Extend the material on both sides outward by 20cm to form anti-erosion flanges 3, ensuring that the material is tightly attached to the base surface, without any gaps or wrinkles. The longitudinal overlap adopts the direction of water flow with the top pressing down, with an overlap width of 10cm. Before overlapping, spray a small amount of clean water on the overlap area of ​​the lower layer material with a spray bottle for pre-wetting, then apply a layer of special polymer cement slurry, and then cover the lower layer material with the upper layer material and press it firmly.

[0031] S3: Preparation of the prototype of the anti-slip platform 4: According to the design position, at the position of the two anti-slip platforms 4 planned at the bottom of the tank 1, a special trapezoidal mold is used to vertically fold and stack the flexible composite material to form a thickened body. The mold is adjusted to ensure that the anti-slip platform 4 is 12cm high and 50cm wide, with a regular shape and close to the bottom plate of the tank.

[0032] S4: Mechanical Anchoring: U-shaped steel bars with a diameter of Φ5mm and a length of 30cm are used as anchors and are laid out according to the following standards: one U-shaped steel bar is driven into the center line of the longitudinal lap joint and each side edge, with a spacing of 10cm; U-shaped steel bars are continuously driven into the outer edge of the anti-scour flange 3 at a spacing of 40cm to ensure that the flange is firmly connected to the slope surface; U-shaped steel bars are driven into the front and rear sides of the anti-slip platform 4, the top of the rapid flow channel, and the toe of the slope at a spacing of 20cm. The U-shaped steel bars are driven into the slope perpendicularly, with both legs bearing the force at the same time, and the driving depth is ensured to be stable and without loosening.

[0033] S5: Watering Activation and Moisturizing Maintenance: Use clean fresh water and water the material twice through a fine-nozzle sprayer to activate it. Spray the entire surface with the first watering until the material color darkens significantly, indicating that the surface is thoroughly wetted. After a 30-minute interval, water the material a second time, slowly spraying until a small amount of water seeps out from the edges and overlaps, ensuring that the entire thickness of the material is activated. Within one hour after watering, use a scraper to press the surface of the material, especially at the joints and anti-slip platform, to completely remove internal air bubbles and ensure that the material adheres tightly to the base layer and between layers without any voids. Subsequently, cover the surface of the material with a damp geotextile for moisturizing maintenance. The maintenance period is 24 hours, during which pedestrians are prohibited from stepping on the material or bearing any load.

[0034] S6: Joint sealing and surface reinforcement: After curing, check all joints for damage and hollow areas. Use a scraper to evenly press the flexible waterproof sealant into the longitudinal overlapping joints and smooth it to form a 6cm wide reinforced sealing strip to ensure a tight seal and a smooth surface. The water flow rate of this slope is moderate, so there is no need to add a wear-resistant coating to the surface. After construction, let it stand for 3 days until the material reaches stable strength before water can be used.

[0035] Example 3: Adaptation and Adjustment for Different Working Conditions When the roadbed fill height H=9m (8m≤H<10m), four anti-slip platforms 4 are set up and evenly distributed along the slope. One additional anti-slip platform 4 is set up at the top and bottom of the slope, for a total of five platforms. The thickness of the flexible composite material is adjusted to 3cm to ensure impact resistance. The anchors use 40cm long U-shaped steel bars to adapt to the foundation conditions of high fill slopes. The longitudinal overlap width is adjusted to 12cm, the overlap interface is coated with polymer cement slurry, and the joint sealing strip width is adjusted to 8cm to further improve impermeability.

[0036] When the foundation is Class III foundation (soft soil), after the foundation trench is excavated, a 15cm thick layer of graded sand and gravel cushion is filled and compacted in layers with a compaction degree of not less than 95%. A layer of geogrid is laid under the cushion for reinforcement to prevent uneven settlement of the foundation. The anchors are U-shaped steel bars with a length of 50cm, and the spacing is increased to 15cm to ensure anchor reliability.

[0037] When the slope is extremely steep (slope 1:0.8) and H=16m, the anti-slip platform 4 is set with 5 steps according to the standard, and 2 more steps are added at the slope inflection point, for a total of 7 steps; the extension width of the anti-scour flange 3 is adjusted to 25cm, and the flange anchoring spacing is increased to 30cm; the cross-section of the tank is adjusted to be arc-shaped to optimize hydraulic conditions and reduce water flow velocity; after construction, a layer of ultra-wear-resistant polymer protective coating is sprayed on the inner surface of the tank to improve scour resistance.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A composite flexible material rapid flow channel, characterized in that, include: An integrated tank formed by on-site hydration and curing of flexible composite materials, the integrated tank including a tank bottom (1) and tank walls (2) symmetrically arranged on both sides; Integrated anti-scouring flanges (3) are installed on the top of the two side walls (2) of the tank body and extend outward horizontally. And at least one anti-slip platform (4) is provided on the bottom (1) of the tank and integrally formed with the tank body, the anti-slip platform (4) being arranged perpendicular to the water flow direction.

2. The composite flexible material rapid flow channel according to claim 1, characterized in that: The flexible composite material is a prefabricated multi-layer composite blanket material, which includes, from top to bottom, a wear-resistant protective layer, a core functional layer, and a seepage-proof isolation layer. The wear-resistant protective layer is a fiber woven layer; The core functional layer includes a three-dimensional mesh skeleton formed by short chopped fibers distributed in a three-dimensional random direction, and dry-mixed cement-based composite material powder filling the pores of the skeleton. The impermeable isolation layer is a dense polymer film or a high-density fiber nonwoven fabric.

3. The composite flexible material rapid flow channel according to claim 2, characterized in that: The chopped fibers are polyvinyl alcohol (PVA) fibers or polypropylene (PP) fibers; The dry-mixed cement-based composite material powder includes cement, active mineral admixtures, graded fine aggregates, and special additives for setting, toughening, and impermeability. The active mineral admixtures are silica fume or fly ash.

4. The composite flexible material rapid flow channel according to claim 1, characterized in that: The number of anti-slip platforms (4) is determined according to the graded grading of the roadbed fill height H on the slope where the rapid flow channel is located. The specific grading standard is as follows: When H<4m, one anti-slip platform is set up (4). When 4m≤H<6m, two anti-slip platforms (4) are set up and evenly distributed along the slope; When 6m≤H<8m, three anti-slip platforms (4) are set up and evenly distributed along the slope; When 8m≤H<10m, four anti-slip platforms (4) are set up and evenly distributed along the slope; When H≥10m, five anti-slip platforms (4) are set up and evenly distributed along the slope; For ultra-long slopes with H>15m or extremely steep slopes with a gradient>1:1, anti-slip platforms are added at the top, bottom and inflection points of the slope (4).

5. The composite flexible material rapid flow channel according to claim 1, characterized in that: The anti-slip platform (4) has a trapezoidal or arc-shaped cross section, a height of 10-15cm, and a width that is the same as or slightly wider than the bottom of the groove (1).

6. The composite flexible material rapid flow channel according to claim 1, characterized in that: The horizontal extension width of the anti-scouring flange (3) is not less than 20cm, and the end of the anti-scouring flange (3) away from the groove wall (2) is bent downward to form an anti-slip fold (5).

7. The composite flexible material rapid flow channel according to claim 1, characterized in that: It also includes multiple mechanical anchors for anchoring the anti-scour flange (3) and the joint of the trough; The mechanical anchor is a U-shaped steel bar made of high-strength low-carbon steel wire or corrosion-resistant alloy steel with a diameter of Φ5mm, or an expansion bolt or chemical anchor of the same specification suitable for hard foundations.

8. A composite flexible material rapid flow channel according to claim 7, characterized in that: The arrangement standard of the mechanical anchor is as follows: at least one U-shaped steel bar is arranged on the center line and both sides of the longitudinal lap joint; U-shaped steel bars are continuously arranged at a spacing of 30-50cm on the outer edge of the anti-scour flange (3); U-shaped steel bars are densely arranged at a spacing of 15-25cm on the front and rear sides of the anti-slip platform (4), the starting point of the rapid flow channel and the inner and outer sides of the bend; the length of the U-shaped steel bar is adjusted according to the foundation conditions, with a length ≥30cm in the soil foundation and 40-50cm in the soft foundation or high fill slope.

9. A construction method for a composite flexible material rapid flow channel, characterized in that, Includes the following steps: S1: Excavation and foundation treatment of the foundation trench: Excavate precisely according to the bottom width, depth and slope ratio of the design section to ensure that the longitudinal slope of the trench bottom (1) is smooth and without sudden changes, and the excavation surface is flat and firm; Differentiated foundation treatment is adopted according to the foundation type. For Class I foundations, after removing the surface soil and debris, it is directly used as the foundation. For Class II foundations, light compaction equipment is used to compact to a compaction degree of not less than 93% and sharp protrusions are leveled. For Class III foundations, a graded sand and gravel cushion layer of not less than 15cm is replaced and compacted in layers. In particularly weak areas, geogrid reinforcement is added. S2: Flexible composite material laying and trough prototype forming: Check the integrity of the material, plan the laying in the order from the foot of the slope to the top of the slope or from the downstream to the upstream, calculate the material usage and reserve no less than 5% overlap and loss margin; follow the order of bottom first and then wall, from bottom to top to lay the flexible composite material, ensure that the material is close to the base surface and there is no suspension, after laying the material covers the bottom (1) and side wall of the trough, and the two sides extend to form anti-scour flanges (3); the longitudinal joint adopts the top-pressing and downward overlapping in the direction of water flow, the overlap width is not less than 10cm, and the overlapping area of ​​the lower layer material is pre-wetted or coated with special polymer cement slurry before overlapping; S3: Preparation of the prototype of the anti-slip table (4): At the planned position of the anti-slip table (4), the flexible composite material is vertically folded, stacked, or thickened with the assistance of a special mold to prepare the prototype of the anti-slip table (4); S4: Mechanical anchoring: Using the mechanical anchors described in claim 7 or 8, anchor the key parts such as the anti-scouring flange (3), longitudinal lap joint and anti-slip platform (4) according to the corresponding arrangement standard. Drive the U-shaped steel bars vertically into the slope or ground to ensure that both legs are stressed at the same time. S5: Watering Activation and Moisturizing Maintenance: Use clean fresh water and water at least twice through a spray bottle, fine-nozzle sprinkler, or low-pressure spray system. The first watering should thoroughly soak the material until the color darkens. After a 30-minute interval, water the material a second time until a small amount of water seeps out from the edges or overlaps, ensuring that the full thickness of the material is activated. Within 1-2 hours after watering, press the surface of the material to remove air bubbles, and cover it with a damp geotextile or plastic film for at least 24 hours of moisturizing maintenance. During the maintenance period, do not step on the material or subject it to any load. S6: Joint sealing and surface reinforcement: For all longitudinal lap joints and transverse cut joints, use flexible waterproof sealant or high-toughness polymer-modified cement mortar to press in and smooth, forming a reinforced sealing strip with a width of 5-8cm; for sections with high water flow velocity and a lot of sand and gravel, after the tank is completely cured, apply or spray an ultra-wear-resistant polymer protective coating to its inner surface.

10. The construction method according to claim 9, characterized in that, In step S2, for complex nodes such as anti-slip platform (4) and drop sill, flexible composite materials are pre-formed on flat ground with the aid of special molds, and then transported to the site for installation and connection.

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