Greening structure for downstream dam slope of rock-fill dam

Abstract

The utility model discloses a greening structure for a downstream dam slope of a rock-fill dam, which relates to the technical field of dam engineering and comprises a lattice beam, geotechnical cloth and a geocell. The lattice beams are provided with reinforced concrete cross beams and reinforced concrete longitudinal beams, the reinforced concrete cross beams and the reinforced concrete longitudinal beams jointly form lattices, and the lattices are filled with planting soil used for planting green plants. The geotechnical cloth is laid at the bottoms of the lattices and used for preventing the planting soil from running into the rock-fill body; the geocell is arranged on the geotechnical cloth in the lattice and used for fixing the planting soil in the lattice and preventing the planting soil from being washed by rainwater and running away along the slope surface; an embedded pipe is arranged at the bottom of the reinforced concrete longitudinal beam and used for laying a spraying system pipeline in the later period. The top face of the reinforced concrete cross beam is a horizontal face, and anti-slip strips are pressed on the surface of the reinforced concrete cross beam. Water and soil loss caused when planting soil in the sash is washed by rainwater can be effectively reduced, plants can be conveniently maintained, and the greening landscape is attractive.

Description

Technical Field

[0001] The utility model relates to the technical field of dam engineering, in particular to a greening structure for a downstream dam slope of a rockfill dam and a construction method thereof. Background Art

[0002] The downstream slope of the rockfill dam is steeper, generally 1:1.3 to 1:1.4. Conventional downstream slopes are generally built with dry stone or large stone, and some are built with stone strips. With the continuous improvement of ecological environment requirements, the downstream slopes of rockfill dams have gradually begun to use plant greening slope protection. Due to the steep slope of the downstream dam, the frame beam structure in the slope engineering is generally used to cover the soil for greening. Before the plants take root and consolidate the soil, the planting soil of the conventional frame beam greening slope protection is easily lost due to rain erosion. The height between the horse paths on the downstream slope of the rockfill dam is generally about 20m. The frame beam greening area between the horse paths is large, the slope is steep, and the height difference is large. It is very inconvenient to supplement the planting soil and maintain the green plants in the later stage, and there are certain safety hazards. The frame beam structure appears to be more abrupt in the green plants, especially the longitudinal frame beam is exposed even after the green plants grow up, affecting the overall greening landscape of the downstream dam slope. Utility Model Content

[0003] The utility model aims to provide a greening structure for the dam slope downstream of a rockfill dam, aiming to solve the problems existing in the prior art that the planting soil in the frame is easy to be lost, the later maintenance is inconvenient and the overall greening landscape downstream is affected.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A greening structure for the downstream slope of a rockfill dam comprises a frame beam, a geotextile and a geocell; the frame beam is provided with a reinforced concrete cross beam and a reinforced concrete longitudinal beam, the reinforced concrete cross beam and the reinforced concrete longitudinal beam together form a frame, and the frame is filled with planting soil for planting green plants; the geotextile is laid at the bottom of the frame to prevent the planting soil from being lost into the rockfill body; the geocell is arranged on the geotextile in the frame to fix the planting soil in the frame to prevent the planting soil from being washed away along the slope by rainwater; the bottom of the reinforced concrete longitudinal beam is provided with a pre-buried pipe for later laying of a sprinkler system pipeline.

[0006] Furthermore, the top surface of the reinforced concrete beam is set as a horizontal plane, and an anti-slip strip is pressed on the surface, which is used to serve as a later maintenance path to facilitate the later maintenance of green plants in the frame.

[0007] Furthermore, the reinforced concrete longitudinal beam is set to be lower in height than the reinforced concrete transverse beam, and the surface and the inside of the frame are covered with soil and planted with green plants, so that the reinforced concrete longitudinal beam is hidden in the greenery.

[0008] Furthermore, the four sides of the geotextile are fixed to the four sides of the grid in the form of hemming or flanging to prevent the geotextile from being misaligned and leaking soil.

[0009] Furthermore, the geocell is fixed to the four sides of the grid by embedded hooks to prevent the geocell from shifting when filling with planting soil.

[0010] Furthermore, two layers of geotextiles are laid.

[0011] The construction steps of the utility model are as follows:

[0012] S1. After the filling of the rockfill dam body is completed and the downstream dam slope is trimmed, lofting is carried out according to the layout of the grid beams on the downstream dam slope to determine the positions of the reinforced concrete cross beams and longitudinal beams. After the settlement of the dam body is basically stable, the grid beam construction is carried out to avoid the influence of the dam body settlement on the grid beams.

[0013] S2. Pour the reinforced concrete cross beams and longitudinal beams, and embed the pre-buried pipes of the spraying system and the embedded hooks for fixing the geotextile and geocell during pouring.

[0014] S3. Lay two layers of geotextiles in the grid, and fix the geotextiles to the embedded hooks on the grid beams around the grid in the form of flanging.

[0015] S4. Lay the pipeline of the spraying system in the pre-buried pipe of the reinforced concrete longitudinal beam and install the spraying system.

[0016] S5. Lay the geocell on the surface of the geotextile in the grid, and fix the geocell to the embedded hooks on the grid beams around the grid.

[0017] S6. Fill the planting soil in the geocell, and plant the corresponding plants in the planting soil according to the landscape requirements.

[0018] The beneficial effects of the utility model are as follows:

[0019] 1. The utility model can effectively reduce the soil erosion when the planting soil in the grid is washed by rainwater;

[0020] 2. The utility model can use the reinforced concrete cross beam as a later maintenance path to facilitate the later maintenance of plants;

[0021] 3. The reinforced concrete longitudinal beam of the utility model is hidden in the planting soil, reducing the influence on the greening landscape of the downstream dam slope.

[0022] 4. The utility model is convenient for the later layout of the spraying system by arranging the pre-buried pipe in the reinforced concrete longitudinal beam. Description of the Drawings

[0023] Figure 1It is the plan view of a greening structure for the downstream slope of a rockfill dam provided by an embodiment of the present utility model;

[0024] Figure 2 It is Figure 1 the sectional view taken along line I--I;

[0025] Figure 3 It is Figure 1 the sectional view taken along line Ⅱ-Ⅱ.

[0026] In the figure: 1 - reinforced concrete cross beam; 2 - reinforced concrete longitudinal beam; 3 - geotextile; 4 - geocell; 5 - planting soil; 6 - green plants; 7 - embedded pipe; 8 - embedded hook; 9 - rockfill body; 10 - anti-slip strip. Specific embodiments

[0027] In order to make the purpose, technical implementation solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] As Figures 1 to 3 shown, a greening structure for the downstream slope of a rockfill dam of the present utility model includes a reinforced concrete cross beam 1, a reinforced concrete longitudinal beam 2, a geotextile 3, a geocell 4, planting soil 5, and green plants 6. The reinforced concrete cross beam 1 and the reinforced concrete longitudinal beam 2 together form a lattice beam structure and are arranged on the slope surface of the rockfill body 9. The top surface of the reinforced concrete cross beam 1 is set as a horizontal plane and an anti-slip strip 10 is pressed on the surface, which is used to double as a later maintenance path for facilitating the maintenance of the green plants 6 in the frame in the later stage. The height of the reinforced concrete longitudinal beam 2 is lower than that of the reinforced concrete cross beam 1, and the reinforced concrete longitudinal beam 2 is hidden in the green plants 6. The geotextile 3 is arranged at the bottom of the frame for preventing the planting soil 5 from flowing into the rockfill body 9. The four sides of the geotextile 3 are fixed to the four sides of the frame through the embedded hooks 8 to prevent the geotextile 3 from being displaced and leaking soil. The geocell 4 is arranged on the geotextile 3 in the frame for fixing the planting soil 5 in the frame to prevent the planting soil 5 from being washed away by rainwater and flowing along the slope. The geocell 4 is fixed to the four sides of the frame through the embedded hooks 8 to prevent the geocell 4 from shifting when filling with the planting soil 5. The embedded pipe 7 is arranged at the bottom of the reinforced concrete longitudinal beam 2 for arranging a spraying system in the later stage.

[0029] The construction steps of the greening structure for the downstream slope of the rockfill dam of the present utility model are as follows:

[0030] S1. After the filling of the rockfill body 9 of the rockfill dam is completed and the downstream slope is repaired, according to the layout of the downstream slope lattice beam, lofting is carried out to determine the positions of the reinforced concrete cross beam 1 and the reinforced concrete longitudinal beam 2, and the lattice beam construction is carried out after the settlement of the rockfill body 9 is basically stable.

[0031] S2. Pour the reinforced concrete cross beams 1 and longitudinal beams 2 to form a grid; the spacing between the reinforced concrete cross beams 1 is 5 m, the beam width is 50 cm, the beam height is 45 cm, and a horizontal plane with a width of 40 cm is provided at the top for the maintenance path, and anti-slip strips 10 are pressed on the top surface; the spacing between the reinforced concrete longitudinal beams 2 is 5 m, the beam width is 50 cm, the beam height is 30 cm, and it is 15 cm lower than the beam height of the reinforced concrete cross beam 1 so as to be hidden in the green plants 6 later; pre-buried pipes 7 are pre-buried during pouring for laying the pipeline of the spray system in the later stage; pre-buried hooks 8 are pre-buried during pouring for fixing the geotextile 3 and geocell 4.

[0032] S3. Lay two layers of geotextiles 3 in the grid, and fix the geotextiles 3 on the pre-buried hooks 8 of the grid beams around the grid in the form of flanging.

[0033] S4. Lay the pipeline of the spray system in the pre-buried pipe 7 of the reinforced concrete longitudinal beam 2, and install the spray system.

[0034] S5. Lay the geocell 4 on the surface of the geotextile 3 in the grid, and fix the geocell 4 on the pre-buried hooks 8 of the grid beams around the grid.

[0035] S6. Fill the planting soil 5 in the geocell 4, and plant the corresponding green plants 6 in the planting soil 5 according to the landscape requirements.

[0036] The above embodiments describe the present utility model in conjunction with the accompanying drawings, but it should not be construed as a limitation to the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, the technical solutions obtained by equivalent substitution or equivalent transformation all fall within the protection scope of the present utility model.

Claims

1. A greening structure for the downstream slope of a rockfill dam, characterized in that: It includes lattice beams, geotextiles, and geocells; the lattice beams are provided with reinforced concrete cross beams and reinforced concrete longitudinal beams, and the reinforced concrete cross beams and the reinforced concrete longitudinal beams jointly form a lattice, and the lattice is filled with planting soil; the geotextile is laid at the bottom of the lattice; the geocell is arranged on the geotextile within the lattice; a pre-embedded pipe is provided at the bottom of the reinforced concrete longitudinal beam.

2. The greening structure for the downstream slope of the rockfill dam according to claim 1, characterized in that: The top surface of the reinforced concrete cross beam is set as a horizontal plane, and anti-slip strips are pressed on the surface.

3. The greening structure for the downstream slope of the rockfill dam according to claim 1, characterized in that: The height of the reinforced concrete longitudinal beam is lower than the height of the reinforced concrete cross beam, and green plants are planted with soil covering on the surface of the reinforced concrete longitudinal beam and within the lattice together.

4. The greening structure for the downstream slope of the rockfill dam according to claim 1, wherein: The four sides of the geotextile are fixed to the four sides of the lattice in the form of edge pressing or edge turning.

5. The greening structure for the downstream slope of the rockfill dam according to claim 1, characterized in that: The geocell is fixed to the four sides of the lattice through pre-embedded hooks.

6. The greening structure for the downstream slope of the rockfill dam according to claim 1 or 4, characterized in that: Two layers of geotextiles are laid.

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