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CN-121976502-A - Ecological canal root system induced flexible lining structure and construction method

CN121976502ACN 121976502 ACN121976502 ACN 121976502ACN-121976502-A

Abstract

The invention discloses an ecological channel root system induced flexible lining structure and a construction method, which are suitable for water conservancy and municipal channel engineering for soft soil mass of a bank slope and the development of a primary vegetation root system. The structure is characterized in that a fine sand root guiding layer and a block stone root blocking layer are sequentially arranged outside a slope soil body, a flexible gabion net cage frame and a plant growing type, hard type and mixed ecological surface lining are arranged on the outer side of the slope soil body, and slope feet are provided with slope foot protection to form a complete protection system. The construction comprises the steps of manual surface cleaning, root system repair, gabion net cage assembly, layered backfilling of drainage layers and ecological surface layer paving. The invention utilizes the characteristics of root system to achieve the effect of avoiding the harmful effects, combines flexible frame adaptation through root guiding layer induction and root blocking layer restriction, enables the root system and the frame to form a three-dimensional anchoring structure, solves the technical contradiction of slope stability, ecological protection and root system management and control, has the advantages of scour resistance and easy maintenance, realizes the unification of engineering functions and ecological symbiosis, and greatly reduces the total life cycle cost of engineering.

Inventors

  • TANG ZEHUA
  • YAN YAO
  • MA XIAOPING
  • TANG RONG
  • YANG XIANGYU
  • Zhu dongxin
  • TANG XIAOYONG
  • TANG ZHENGXIANG

Assignees

  • 湖南省水利水电勘测设计规划研究总院有限公司

Dates

Publication Date
20260505
Application Date
20260314

Claims (10)

  1. 1. The utility model provides an ecological canal root system induced type flexible lining structure, its characterized in that, channel side slope soil body outwards sets gradually fine sand and leads root layer (10), block stone and hinder root layer (11), just fine sand lead root layer (10) with block stone hinders root layer (11) outside and is provided with gabion box with a net frame, ecological facing lining (8) have still been laid in the outside of gabion box with a net frame, channel side slope toe department is provided with domatic foot protector (9), domatic foot protector (9) with gabion box with a net frame ecological facing lining (8) link up and form complete side slope protection architecture mutually.
  2. 2. The ecological canal root system induced flexible lining structure according to claim 1, wherein the fine sand root guiding layer (10) is a fine sand layer with the particle size of 0.075-0.25mm and the thickness of 15cm, the fine sand root guiding layer (10) adopts loose backfilling, the fine sand porosity is 15% -25%, and a continuous water film is formed on the surface of fine sand particles.
  3. 3. The ecological canal root system induced flexible lining structure according to claim 1, wherein the block stone root-blocking layer (11) is a random block stone layer with a thickness of 15cm, gaps without water tightness are formed among the block stones, and the block stone root-blocking layer (11) has both drainage and physical root-blocking functions.
  4. 4. The ecological canal root system induced flexible lining structure according to claim 1, wherein the gabion mesh box frame is formed by assembling a vertical gabion mesh box (7) and a horizontal gabion mesh box (13), and the assembled gabion mesh box frame forms a grid (14) structure with the size of 1m multiplied by 1m, and the fine sand root guiding layer (10) and the block stone root blocking layer (11) are backfilled in the grid (14) in a layered manner.
  5. 5. The ecological canal root induction type flexible lining structure according to claim 4, wherein the gabion mesh box frame is a flexible occlusion structure to adapt to root growth stress and uneven settlement of a foundation to achieve fine adjustment deformation.
  6. 6. The ecological canal root system induced flexible lining structure according to claim 1 is characterized in that the ecological surface lining (8) comprises three types of vegetation type, hard type and mixed type, wherein the vegetation type is a turf slope protection formed by earthing and sowing local moisture-proof and developed-root-system grass seeds, the hard type is an ecological interlocking brick paved with soil in a brick hole for grass planting, the mixed type is an ecological interlocking brick paved below a normal water level, and the turf slope protection is adopted above the normal water level.
  7. 7. An ecological canal root system induced type flexible lining construction method, which is applied to the ecological canal root system induced type flexible lining structure according to any one of claims 1-6, and is characterized by comprising the following steps: S1, manually cleaning the surface, and manually cleaning weeds, garbage and surface layer floating soil (6) of a channel side slope to expose a root system (4) in the side slope; S2, root system repair, namely selectively trimming fibrous roots and side roots (2) which extend into channels and lead to disorder of side slopes, retaining main roots and thick roots (3) of the existing tree (1), removing the trimmed fibrous roots and side roots (5), carrying out slope trimming on a gabion mesh box frame, splicing a vertical gabion mesh box (7) and a transverse gabion mesh box (13) on the trimmed side slopes to form a gabion mesh box frame, forming a grid (14) with the size of 1m multiplied by 1m, setting a backfill layer with guide rows, firstly backfilling fine sand in the grid (14) to form a fine sand guide root layer (10) closely attached to a side slope soil body, and backfilling stone on the fine sand guide root layer (10) to form a stone block root layer (11), thus forming a complete layer (12); S5, an ecological surface lining is paved on the outer side of the block stone root-blocking layer (11) in any one of a vegetation mode, a hard mode and a mixed mode, and connection construction of the slope foot protector (9) with the gabion cage frame and the ecological surface lining (8) is completed.
  8. 8. The construction method for the ecological canal root system induced flexible lining according to claim 7, wherein after the construction is completed, the gabion mesh box frame and the plant root system induced to grow by the fine sand root guiding layer (10) form a three-dimensional net-shaped anchoring structure, the plant root system horizontally extends and roundabout grows along the layer under the induction of the fine sand root guiding layer (10), and the root system does not penetrate through the block stone root blocking layer (11).
  9. 9. The construction method for the root system-induced flexible lining of the ecological canal according to claim 7, wherein the fine sand root guiding layer (10) adopts a loose backfilling process, the block stone root blocking layer (11) adopts a random block stone natural stacking process, and both backfilled layers are tightly attached to the inner wall of the grid (14).
  10. 10. The construction method for the ecological canal root system induced flexible lining according to claim 7, which is applicable to water conservancy and municipal canal engineering for the soft soil mass of a bank slope and the development of the root system of original vegetation, including urban ecological canal treatment engineering and irrigation canal seepage prevention reinforcement engineering.

Description

Ecological canal root system induced flexible lining structure and construction method Technical Field The invention relates to the technical field of ecological channel engineering, in particular to an ecological channel root system induced flexible lining structure and a construction method. Background The water conservancy and municipal canal engineering is a main infrastructure for water resource allocation and ecological management of urban water, the structural stability and ecological compatibility of the bank slope are main consideration factors of engineering construction, and particularly lining technology for reinforcing the bank slope, preventing seepage and resisting impact and protecting ecology is needed in the area where the soil mass of the bank slope is soft and the root system of the original vegetation develops. The traditional canal lining scheme is mainly divided into a hard lining type and a pure vegetation slope protection type, and the technical defects which are difficult to overcome exist, so that the construction requirements of modern ecological hydraulic engineering cannot be met. The rigid lining such as concrete lining, root-blocking film laying and the like can realize good seepage prevention and side slope stabilization effects, but the rigid structure breaks the ecological connection of the land-water staggered zone, damages the growth environment of the original vegetation and a soil microbial system, and reduces the biological diversity, meanwhile, the rigid structure cannot adapt to the natural growth of plant root systems, the expansion force of the root systems is easy to break the lining structure, the problems of cracking, leakage and the like are caused, the subsequent maintenance cost is high, the water drainage is not smooth, the softening of a soil body of a bank slope is easy to be caused, and the side slope stability is reduced. The plant root system is free from directional guidance, the root system extending in a disordered direction is easy to damage the soil structure of a channel, the main function of engineering seepage prevention reinforcement is difficult to realize, and the plant root system soil fixing device is not suitable for water conservancy and municipal channel engineering with requirements on structural strength. In order to solve the technical contradiction, the industry tries to ecologically improve the hard lining or add a simple protection structure to the vegetation slope protection, but most of the simple technology is overlapped, so that the conflict between root system management and control and slope stabilization, ecological protection and engineering functions is not fundamentally solved, or the risk of damaging the lining by the root system still exists, or the protection effect is insufficient and the ecology is poor. Therefore, the canal lining structure capable of actively guiding the directional growth of the root system and realizing the flexible adaptation of the root system development of the structure and simultaneously giving consideration to the side slope impact resistance, seepage prevention and ecological system protection and the construction method are developed, become the technical problems to be solved urgently in the fields of water conservancy and municipal canal engineering, and are also important directions for promoting the development of ecological hydraulic engineering. Disclosure of Invention Therefore, the invention provides an ecological channel root system induced flexible lining structure and a construction method, which are used for solving the problems that in the prior art, the stability and ecology of a channel side slope are difficult to consider and the lining is easily damaged by the root system because the rigid lining is strong, the pure vegetation slope protection is weak in impact resistance, and the root system growth cannot be reasonably controlled. In order to achieve the aim, the technical scheme is that the ecological canal root system induced flexible lining structure is characterized in that a fine sand root guiding layer and a block stone root blocking layer are sequentially arranged outside a canal slope soil body, gabion net box frames are arranged outside the fine sand root guiding layer and the block stone root blocking layer, an ecological surface lining is paved outside the gabion net box frames, slope protection feet are arranged at slope feet of the canal slope, and the slope protection feet are connected with the gabion net box frames and the ecological surface lining to form a complete slope protection structure. As an optimal scheme of the ecological canal root system induction type flexible lining structure, the fine sand root guiding layer is a fine sand layer with the particle size of 0.075-0.25mm and the thickness of 15cm, loose backfilling is adopted for the fine sand root guiding layer, the fine sand porosity is 15% -25%, and a continuous water film is formed on the