CN113585296B - Artificial slope prefabricated flexible support ecological comprehensive treatment structure and its construction method - Google Patents

Abstract

The invention discloses an artificial slope assembly type flexible support ecological comprehensive treatment structure and a construction method thereof, wherein the structure comprises a gabion system, a fixed connection system and a drainage system; the gabion system comprises a plurality of gabion units arranged on the step-shaped slope, each gabion unit comprises four gabion frames which are distributed in a staggered mode in the upper direction, the lower direction, the left direction and the right direction and have the same structure, and a gap is formed in a middle area defined by the four gabion frames; fixed connection system, including prefabricated connecting piece, the connecting piece is installed in the clearance, and the part that four directions extend about the connecting piece respectively with the last gabion frame that corresponds, lower gabion frame, left gabion frame, right gabion frame contact each other, and the side slope passes through soil nail with the center of connecting piece to be connected, connects four gabion frames and forms wholly. The invention has the functions of reinforcing, seepage prevention, water drainage and greening, has low manufacturing cost, fully utilizes the self deformation of the side slope to realize the cooperative stress and prevents the instability and damage of the shallow layer of the side slope.

Description

Artificial slope assembly flexible support ecological comprehensive treatment structure and its construction method

technical field

The invention belongs to the technical field of slope treatment, and relates to an artificial slope assembly-type flexible support ecological comprehensive treatment structure and a construction method thereof.

Background technique

In the construction of expressways, the original terrain conditions are difficult to meet the linear requirements of the flat and vertical sections, and deep excavation and high filling of subgrades are inevitable during the construction process. After the excavation, the shear strength of the rock and soil mass has been continuously reduced under the long-term action of the hot and humid environment, and it is very easy to have shallow slope instability and damage phenomena such as weathering, spalling, rockfall, collapse, and slump. Shallow slope instability and failure generally occur within 6m below the slope surface, and the large amount and wide area have become a major technical problem for artificial slope management.

The exposed artificial slope is not conducive to the protection of the ecological environment. On the one hand, the surface of the exposed artificial slope lacks soil, water and organic matter, and the plants cannot grow normally, and the vegetation is difficult to recover under natural conditions; Exacerbating soil erosion on the surface and making vegetation restoration more difficult. At present, the commonly used slope protection methods are: gravity retaining wall, buttress retaining wall, cantilever retaining wall support, row pile anchor retaining wall support, spray anchor support, etc. Although the above methods can effectively improve the stability of the slope, the coordination between the supported slope and the surrounding natural landscape is poor, and it is difficult to meet the requirements of ecological environment protection. There are also major deficiencies in slope drainage and water replenishment. Long-term accumulation of water on the surface of the slope will soften the rock and soil mass, and it is very easy to cause shallow slope instability and damage, which will cause hidden dangers to the stability of the slope. When ordinary steel mesh + gabion slope protection is used, the gaps between the stones are large and connected to each other. Although the water can be effectively discharged, the correlation between the gabions is weak and the cooperative force capacity is poor. Once the slope partially slides, The reinforced mesh + gabion slope protection structure is extremely prone to damage, and its protection against local deformation of the slope is extremely limited.

The patent of publication number CN206928301U discloses a kind of reinforced gabion slope support structure, and this patent relates to be used for improving the drainage and reinforcement effect of soft soil slope, but it is difficult to give consideration to greening and water storage. The patent with publication number CN107439356A discloses a method for realizing gabion stabilization and greening and a gabion greening system, which effectively solves the problems of gabion falling off and no greening function, and organically combines anchor rods, gabion and planting tubes, which can Preventing damage caused by hydrostatic force is conducive to the stability of hillsides and beaches, and at the same time increases the greening effect, but the integrity is not good and the reinforcement effect is poor.

In the process of realizing the present invention, the inventor finds that there are at least the following problems in the prior art:

1. Poor anti-seepage ability. The existing slope reinforcement technology does not solve the problem of slope anti-seepage well. It cannot be completed in one step during the construction of the project, and an additional anti-seepage structure is required, which greatly slows down the progress of the project and increases the cost of treatment. Once the slope is not well drained, the rainwater will go deep into the slope to soften the rock and soil mass, even if the slope is reinforced, it will greatly affect the stability of the slope;

2. Poor greening effect. The traditional slope treatment technology is difficult to take into account the greening while strengthening the slope, which is prone to visual gray pollution and affects the ecological environment and landscape. When treating rocky slopes, the thin and shallow vegetative soil makes it difficult for vegetation to grow, and the poor water retention capacity of the soil in the continuous dry season further affects the growth of plants;

3. The project cost is high and the utilization rate is low. The existing slope treatment technology does not make full use of the slope's own deformation capacity and adopts a large number of rigid structures, which not only increases the project cost but also reduces the utilization rate;

4. No attention was paid to the prevention of shallow slope instability and damage. A large number of engineering practices have shown that slopes affected by hydrothermal cycles often experience instability and failure on their surfaces. Traditional slope treatment technologies seldom take preventive measures against shallow slope instability and damage, resulting in frequent occurrence of surface instability and damage, which not only affects surface greening but also reduces the reinforcement capacity of the structure.

Contents of the invention

In order to solve the above problems, the present invention provides an artificial slope assembly-type flexible support ecological comprehensive treatment structure, which takes into account the functions of reinforcement and anti-seepage, drainage and replenishment, and greening, and has low cost. The shallow layer instability and destruction of the slope solves the problems existing in the prior art.

Another object of the present invention is to provide a construction method for an artificial slope assembly type flexible support ecological comprehensive treatment structure.

The technical solution adopted in the present invention is an artificial slope assembly type flexible support ecological comprehensive treatment structure, including a gabion system, a fixed connection system, and a drainage system;

The gabion system includes a plurality of gabion units arranged on the stepped slope, and each gabion unit includes four gabion frames with the same structure distributed up, down, left, and right, that is, the lower gabion The frame is set on the first step, the left gabion frame and the right gabion frame are set on the second step, the upper gabion frame is set on the third step, and there is a gap in the middle area surrounded by four gabion frames. A grouting pipe is provided at the bottom of each gabion frame;

The fixed connection system includes connectors, the connectors are installed in the gap, and the parts extending in the four directions of the connectors are respectively connected with the corresponding upper gabion frame, lower gabion frame, left gabion frame, and right gabion frame. In contact with each other, the center of the slope and the connector is connected by soil nails, and the four gabion frames are connected to form a whole.

Further, the top of the connector is provided with an L-shaped incision, the bottom of the upper gabion frame is in contact with the L-shaped incision, the bottom of the connector is in contact with the top of the lower gabion frame, and the top of the lower gabion frame is provided with a longitudinal section of Z. Type baffle, the baffle is close to the front wall of the connector, the top of the lower gabion frame and the front wall of the lower gabion frame, the left and right sides of the baffle extend outwards, limiting the direction of the left and right gabion frames Displacement away from the slope direction.

Further, a rib with a triangular longitudinal section is provided between the front wall surface of the baffle close to the connecting piece and the top of the lower gabion frame.

Further, the drainage system includes drainage ditches arranged at the side and foot of the slope, intercepting ditches at the top of the slope, geotextiles, side geotextiles and drainage boards;

The geotextile covers the horizontal part and the vertical part of the stepped slope, and the geotextiles covering the upper and lower steps overlap at the vertical part, and a drainage board is arranged between the two overlapping geotextiles, and the drainage board Close to the vertical part; the horizontal part has an arc-shaped sunken part, and gravel is laid on the arc-shaped sunken part, so that the surface of the horizontal part is smooth;

The side geotextile is wrapped on the free side of the gabion frame.

Further, block stones are placed in each of the gabion frames, the vegetation soil is distributed in the space between the blocks, and the plants are planted in the vegetation soil.

Further, the grouting pipe is L-shaped, the horizontal part of the grouting pipe is parallel to the frame bottom of the corresponding gabion frame, the vertical part of the grouting pipe extends out of the gabion frame, and the end of the grouting pipe extending out of the gabion frame is provided with a grouting mouth; the horizontal part of the grouting pipe is evenly distributed with a number of small holes with a diameter of 0.005-0.01m.

Further, the gabion frames are all composed of rectangular parallelepiped steel bar frames and gabion nets, and the gabion frames are provided with steel bar spacers.

Further, a hole with a diameter of 0.05m is reserved in the middle and upper part of the connecting piece, and a hollow cylinder-shaped metal gasket is installed at the entrance of the hole, and a soil nail hole is provided in the soil below the gap corresponding to the connecting piece. The nail goes through the hole and extends into the soil nail hole, and the soil nail and the metal gasket are welded firmly after grouting.

Further, the depth of the soil nails penetrating into the slope soil is 6-8m.

A construction method for the above-mentioned artificial slope assembly type flexible support ecological comprehensive treatment structure, specifically according to the following steps:

S1: Deal with debris on the slope surface, and build drainage structures at the top, side, and foot of the slope;

S2: Gradual excavation of the slope surface is carried out from the top of the slope downward to form a stepped slope with a transverse slope of 1:40;

S3: Flat stepped slope surface;

S4: Plan the position of each gabion frame, the left or right gabion frame of each gabion unit is the upper or lower gabion frame of the adjacent gabion unit, the left gabion frame of each gabion unit The distance between the gabion frame and the right gabion frame is adapted to the width of the connecting piece embedded in the gabion unit; a grouting pipe is pre-buried at the bottom of the gabion frame, and the stones are first put into the side of the upper gabion frame close to the slope , after the filling of the side of the lower gabion frame close to the slope is completed, then put the block stones into the side of the upper gabion frame away from the slope body, and the free side of the gabion frame is wrapped with side geotextile;

S5: After the prefabricated connecting parts are transported to the construction site, they are placed in the gap, and the center of the slope and the connecting parts is connected by soil nailing grouting, and the corresponding four gabion frames are connected to form a whole;

S6: Pour the liquid plant soil with plant seeds into the corresponding gabion frame through the preset grouting pipe to fill the gaps between the stones, and stop pouring after the plant soil overflows the upper surface of the stone by 3~5cm.

The beneficial effects of the present invention are:

1. Strong drainage and anti-seepage ability. "Seepage control prior to drainage" is a significant advantage of the flexible use of geotextiles in the present invention. Reasonable use of geotextiles can not only improve the seepage prevention capability of the gabion structure, but also effectively drain water seepage from rock and soil below the slope. The seepage water collects on the slope below the upper step geotextile, and then is guided by the drainage board to the lower step geotextile and flows into the drainage ditch on the side of the slope with the slope direction of the horizontal platform step, which can effectively discharge the rock and soil seepage below the slope. Most of the rainwater at the top of the slope is collected in the intercepting ditch and discharged, a small part of the seepage water is collected under the geotextile of each horizontal platform step, part of it flows into the drainage ditch on the side of the slope along the slope direction of the horizontal platform step, and the other part flows down along the pores of the vertical drainage plate One step above the geotextile, which eventually flows into the drainage ditch. Reducing rainwater infiltration can effectively prevent the occurrence of slope diseases under the action of hydrothermal cycle. Most of the existing slope treatment technologies drain water along the direction of slope decline. Too long drainage paths can easily cause soil erosion and rainwater infiltration on the slope surface, affecting the greening effect and slope stability. In the present invention, the arc-shaped design of the horizontal platform improves the water collection capacity to replenish water for green plants, and at the same time, the small slope design changes the drainage path, which significantly shortens the residence time of rainwater on the slope;

2. Good greening effect. It is difficult to take into account the greening of the slope reinforced by ordinary gabions, and the exposed gabion mesh + block stones are not in harmony with the surrounding natural ecological landscape. The invention takes both reinforcement and greening into account, and the combined structure of rocks and planting soil has sufficient thickness to store water and nutrients required for plant growth, provide a good growth environment for slope vegetation, and ensure greening effects. After planting green plants, the roots of the plants can go deep into the planting soil, which makes the connection between the planting soil and the rocks stronger, and can effectively reduce the loss of the planting soil;

3. Good integrity. The invention can greatly improve the integrity of the gabion structure while taking into account the greening, water drainage and replenishment, and can not only retain the advantages of the flexible structure to adapt to the unevenness of the platform surface and the larger deformation of the slope, but also increase the collaborative force between the gabions. effect. The prefabricated connecting piece used in the present invention firmly connects the surrounding gabions, and the combination of the prefabricated connecting piece and the soil nail transmits the structural stress to the deep rock and soil mass, which can effectively prevent the instability of the shallow layer. This flexible support method can effectively exert the self-supporting capacity of the slope, allowing the slope to have a certain deformation without being damaged. When the slope is partially deformed, the flexible gabion structure can produce a certain deformation and transmit it through the baffle. To other gabions and soil nails, they are deformed and stressed together, which is beneficial to the overall sharing of deformation and damage caused by excessive force on local gabions;

4. The project cost is low and the construction process is simple. The present invention adopts the assembled construction method. Original raw materials such as gabion frames, prefabricated connectors, geotextiles, grouting pipes, and liquefied planting soil are pre-made in the factory and then transported to the construction site for assembly. The quality is guaranteed and the construction process is very accurate. easy. The construction sequence from top to bottom is suitable for slope excavation, which can not only shorten the construction period but also save the cost of slope support. At the same time, the price of all the above raw materials is very low, and the stones near the construction site can be put into the gabion net. The engineering cost of the overall structure is low, and it is suitable for multi-point and large-area use.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a side view of an embodiment of the present invention.

Fig. 2 is a front view of an embodiment of the present invention.

Fig. 3 is a side view of the side slope excavation construction according to the embodiment of the present invention.

Fig. 4 is a side view of the vertical drainage board according to the embodiment of the present invention.

Fig. 5 is a front view of the gabion structure in the embodiment of the present invention.

Fig. 6 is a schematic diagram of stone loading according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a grouting pipe according to an embodiment of the present invention.

Fig. 8 is three views of the gabion frame of the embodiment of the present invention.

Fig. 9 is an enlarged side view of an embodiment of the present invention.

Fig. 10 is a three-view view of the connector of the embodiment of the present invention.

In the figure, 1. Interception ditch, 2. Drainage ditch, 3. Horizontal part, 4. Vertical part, 5. Arc-shaped sunken part, 6. Geotextile, 6-1. First-level geotextile, 6-2 .The next level of geotextile, 7. Baffle, 8. Drainage board, 9. Gravel, 10. Left gabion frame, 11. Right gabion frame, 12. Upper gabion frame, 13. Lower gabion frame, 14. Side geotextile, 15. Frame bottom, 16. Grouting pipe, 17. Grouting port, 18. Inside the gabion, 19. Reinforcement mesh, 20. Outside the gabion, 21. Connector, 22. Gap, 23 . Holes, 24. Soil nail holes, 25. Metal spacers, 26. Soil nails.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1,

An artificial slope assembled flexible support ecological comprehensive treatment structure, including a gabion system, a fixed connection system, and a drainage system;

As shown in Figure 1-2 and Figure 5-7, the gabion system includes multiple gabion units arranged on a stepped slope, and each gabion unit includes four Gabion frames with the same structure, that is, the lower gabion frame 13 constitutes the first step, the left gabion frame 10 and the right gabion frame 11 constitute the second step, and the upper gabion frame 12 constitutes the third step. The middle area surrounded by the cage frame is provided with a gap 22, and the bottom of each gabion frame is provided with an L-shaped grouting pipe 16, and block stones are placed in each gabion frame, and the planting soil is distributed in the space between the block stones. The plants are planted in the vegetation soil, and the vegetation soil is mixed with local fine-grained soil mixed with organic matter, fertilizer, water and other ingredients.

The fixed connection system includes connectors 21. The connectors 21 are prefabricated concrete structures. The connectors 21 are installed in the gap 22. The parts extending in the four directions of the connectors 21 are respectively connected with the corresponding upper gabion frame 12 and the lower gabion frame. The cage frame 13, the left gabion frame 10, and the right gabion frame 11 are in contact with each other, and the center of the side slope and the connector 21 is connected by a soil nail 26, and the four gabion frames are connected to form a whole.

The drainage system includes a drainage ditch 2 at the foot of the slope and an intercepting ditch 1 at the top of the slope; it also includes a geotextile 6 , a side geotextile 14 and a drainage board 8 .

As shown in Figure 3-4 and Figure 6, both the horizontal part 3 and the vertical part 4 of the stepped slope are covered with geotextiles 6, and the geotextiles 6 covering the upper and lower steps overlap at the vertical part 4, A drainage board 8 is arranged between the two overlapping geotextiles 6, and the drainage board 8 is close to the vertical part 4; the horizontal part 3 has an arc-shaped sunken part 5, and the arc-shaped sunken part 5 is covered with a single-graded crushed stone 9 , so that the surface of the horizontal portion 3 is flat, and the free side of the gabion frame is wrapped with a side geotextile 14 .

As shown in Figure 7, the horizontal part of the grouting pipe 16 is parallel to the frame bottom 15 of the corresponding gabion frame, the vertical part of the grouting pipe 16 extends out of the gabion frame, and the end of the grouting pipe 16 protruding out of the gabion frame is provided with a grouting port 17. The horizontal part of the grouting pipe 16 is evenly arranged with a plurality of small holes with a diameter of 0.005-0.01 m, and the particle size of the vegetation soil is smaller than the diameter of the holes. The diameter of the grouting pipe 16 is 0.04m, the vertical length of the grouting pipe 16 is 0.6m, and the horizontal portion of the grouting pipe 16 is 3.8m long.

As shown in Figure 8, the gabion frames are all made up of rectangular parallelepiped steel bars and gabion nets, with specifications of 4m in length, 0.6m in width, and 0.5m in height; It is divided into one side close to the air surface (20 outside the gabion) and one side close to the slope (18 inside the gabion). The width ratio of the inside 18 of the gabion to the outside 20 of the gabion is 2:1, which is convenient for construction and avoids gabion The empty part of the frame was destroyed, and the stone fell. During the prefabrication process of the gabion frame in the factory, the connecting parts can be mass-produced by using the mold, and the quality, economy and production efficiency can be guaranteed. Gabion net is made of low carbon steel wire with high corrosion resistance, high strength and ductility or steel wire covered with PVC by mechanical weaving.

As shown in Figure 9-10, the main part of the connector 21 is embedded in the gap 22, the top of the connector 21 is provided with an L-shaped cutout, the bottom of the upper gabion frame 12 is in contact with the L-shaped cutout, and the bottom of the connector 21 is in contact with the lower gabion. The tops of the frames 13 are in contact with each other, and the top of the lower gabion frame 13 is provided with a Z-shaped baffle in longitudinal section, and the baffle is close to the front wall of the connector 21, the top of the lower gabion frame 13 and the front wall of the lower gabion frame 13, The left and right sides of the baffle extend outward to constrain the displacement of the left gabion frame 10 and the right gabion frame 11 away from the slope, which is convenient for installation, and the connecting piece 21 can generate sufficient restraint force on the gabion.

Baffle plate close to the front wall surface of connector 21 and lower gabion frame 13 tops are provided with the rib plate that vertical section is triangular, the function is to alleviate stress concentration phenomenon, increase the rigidity of connector 21.

As shown in Figure 10, the board length of the connector 21 is 0.6m, the board width is 0.2m, the board height is 0.5m, the upward extension is 0.2m, and the downward extension is 0.2m. The length and height of the slab are adapted to the width and height of the steps of the slope. The horizontal part 3 of the stepped slope is 0.5m wide and the vertical part 4 is 0.5m high; The thickness of the layer; the extension length of the board to the surroundings takes into account the practicality and economy.

A hole 23 with a diameter of 0.05m is reserved in the middle and upper part of the connector 21, and a hollow cylindrical metal gasket 25 is installed at the entrance of the hole 23, and a soil nail hole 24 is provided in the soil below the gap 22 corresponding to the connector 21 , The soil nail 26 extends into the soil nail hole 24 through the hole 23 . The height of the metal spacer 25 is 0.02m, the outer diameter is 0.1m, and the inner diameter is 0.05m; the soil nail 26 adopts a steel bar with a diameter of 0.016~0.032m and a length of 6~8m, and the steel bar and the metal spacer 25 are firmly welded after grouting ; The diameter of the reinforcement of the connector 21 is 0.016m, and the distance between them is 0.1m long and 0.1m wide.

The combination of the soil nail 26 and the gabion unit effectively exerts the self-supporting capacity of the rock and soil, allowing the rock and soil to deform to a certain extent without being damaged, and even when the rock mass to be reinforced is moved as a whole, it can still ensure a considerable supporting resistance. protective measures. Soil nails 26 can exert a sufficient reinforcement effect when they go deep into the slope shallow layer about 2m below the critical surface of failure. Generally, the depth of the shallow layer failure critical surface of soft rock and soil slopes is 4-6m, so soil nails 26 go deep into the slope The depth inside the soil is 6-8m. If the soil nails 26 are too short, the stability of the slope will be reduced. Increasing the length of the soil nails 26 can effectively improve the stability of the slope. However, when the soil nails 26 are too long, it will affect the slope stability The effect is not obvious, and will increase the project cost and construction difficulty.

Example 2,

A construction method for an artificial slope assembly-type flexible support ecological comprehensive treatment structure, specifically in accordance with the following steps:

S1: To deal with debris on the surface of the slope, first build the intercepting ditch 1 at the top of the slope, and then build the drainage ditch 2 at the foot of the slope.

S2: The machine excavates the slope in stages from the top of the slope downwards to form a stepped slope. The horizontal part 3 of the stepped slope is 0.5m wide, the vertical part 4 is 0.5m high, and the middle of the horizontal part 3 sinks 0.05m. Arc-shaped, with a transverse slope of 1:40; for drainage;

S3: Cover the surface of the stepped slope with geotextile 6 to ensure that the surface of the stepped slope is flat; the first level of geotextile 6-1 clings to the soil to cover the horizontal part 3 of the stepped slope and leaves a length of 0.3m Adjacent to the soil of the vertical portion 4 below, the next-level geotextile 6-2 covers the soil of the lower step horizontal portion 3, while the upper end of the next-level geotextile 6-2 is connected to the first-level geotextile 6 -1 Overlap 0.1m at the vertical part 4 of the step, leave a length of 0.3m for the lower end of the next-level geotextile 6-2 to be close to the soil of the vertical part 4 below, and repeat until all are covered Slope surface; a drainage board 8 is provided between the overlapping first-level geotextile 6-1 and the next-level geotextile 6-2, the drainage board 8 is close to the vertical part 4, and the height of the drainage board 8 is 0.5m. Pave single-graded crushed stones 9 at the arc-shaped depression of the horizontal portion 3 until the surface of the horizontal portion 3 is level.

S4: Plan the position of each gabion frame, the left gabion frame 10 or the right gabion frame 11 of each gabion unit is the upper gabion frame 12 or the lower gabion frame 13 of the adjacent gabion unit, so that the upper and lower levels The gabion frames are arranged in dislocation; the distance between the left gabion frame 10 and the right gabion frame 11 of each gabion unit is adapted to the width of the connecting piece 21 embedded in the gabion unit. In this embodiment, the connecting piece 21 is embedded in the gabion The width of the unit part is 0.2m, and the distance between the left gabion frame 10 and the right gabion frame 11 of each gabion unit is 0.01m larger than the width of the connecting piece 21 embedded in the gabion unit part. The gabion frame is transported to the construction site after it is manufactured in the factory. The low-weight gabion frame is transported to the designated location manually or mechanically. There are pre-buried grouting pipes 16 at the bottom of the gabion frame, and the nozzle elevation is 0.1~0.2 m; use local materials to collect block stones near the slope body, put the stone blocks into the side of the upper gabion frame close to the slope body, and put the block stones into the side of the slope body after the lower gabion frame is filled. The upper-level gabion frame is kept away from the side of the slope body, so as to avoid the damage of the adjacent part of the gabion frame and the falling of block stones; the adjacent side of the gabion frame is wrapped with a side geotextile 14 . The order of excavation and arrangement of gabions is from top to bottom, and the multi-level step forming process should be synchronized with the slope excavation process, so as to avoid damage to the slope during the unsupported period after excavation, and save construction time. It is beneficial to shorten the construction period.

S5: The connector 21 is prefabricated, which reduces the complexity, reduces the cost, and controls the quality; after the prefabricated connector 21 is transported to the construction site, it is placed in the gap 22, and the center of the slope and the connector 21 is injected through the soil nail 26 Connect the corresponding four gabion frames to form a whole; specifically, the soil nail 26 passes through the hole 23 and extends into the soil nail hole 24, and the soil nail 26 is reserved 0.05-0.1m outside the connector 21, and the bottom The grouting method pours cement mortar into the soil nail hole 24. The grouting pipe should be inserted at a distance of 0.25~0.5m from the bottom of the hole, and pulled out at a slow and uniform speed with the injection of the grout to ensure that the cement mortar fills the soil nail hole 24 and the hole 23. After the slurry is finished, the metal gasket 25 at the soil nail 26 and the hole 23 places is welded firmly.

S6: Pour the liquid plant soil with plant seeds into the corresponding gabion frame through the preset grouting pipe 16. The liquid plant soil with plant seeds has a certain fluidity when poured into the gabion, which meets the pumping requirements. Check the airtightness between the geotextile and the frame on the side of the gabion frame, pour into the bottom of the gabion frame at a uniform speed and fill the gap between the stones, and stop pouring after the planting soil overflows the upper surface of the stone by 3~5cm.

Repeat the above steps to complete the construction of all gabion units on the slope, and monitor the deformation of the slope and gabion structures and the growth of plants. If the deformation of the slope and the gabion structure occurs, repairs should be carried out quickly to ensure that the stressed structure is not damaged; when the slope body begins to slide, stones can be piled up at the corner of the slope in an emergency to prevent landslides.

The slope treatment structure proposed by the embodiment of the present invention takes into account reinforcement, greening and drainage at the same time; uses geotextiles and horizontal drainage paths to achieve the purpose of quickly draining the surface water of the slope and reducing water seepage inside the slope; gabion + block stone + plant soil The combined structure can store water and nutrients needed for plant growth, provide a good growth environment for slope vegetation, ensure the greening effect, realize the purpose of greening the slope and coordinating the natural landscape; the flexible structure combined with soil nails 26 and gabion can Effectively reinforce the slope, prevent slope instability and damage, and pursue green ecology under the premise of providing sufficient support for the slope. The flexible support method can effectively exert the self-supporting capacity of the slope. When the slope is partially deformed, the flexible gabion structure can produce a certain deformation, and transmit it to other gabions and soil nails 26 through the connector 21, and jointly deform together. , Coordinated stress, finally the soil nail 26 transmits the external force to the depth of the slope body. The organic combination of the soil nail 26 and the gabion not only improves the integrity of the gabion, but also greatly improves the ability of the structure to reinforce the slope. In addition, the construction of the soil nail 26 requires less mechanical equipment and relatively low technical requirements. Compared with the anchor, the construction cost is significantly reduced. It overcomes the technical problems of poor anti-seepage ability, poor greening effect, high cost, poor integrity, and inability of the structure to cooperate with the force of the existing slope support technology.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims (6)

1. An artificial slope assembled flexible support ecological comprehensive treatment structure is characterized in that it includes a gabion system, a fixed connection system, and a drainage system; The gabion system includes a plurality of gabion units arranged on the stepped slope, and each gabion unit includes four gabion frames with the same structure distributed up, down, left, and right, that is, the lower gabion Frame (13) is arranged on the first step, left gabion frame (10) and right gabion frame (11) are arranged on the second step, upper gabion frame (12) is arranged on the third step, four stone cages The middle area surrounded by the cage frame is a gap (22), and the bottom of each gabion frame is provided with a grouting pipe (16); The fixed connection system includes a connecting piece (21), the connecting piece (21) is installed in the gap (22), and the parts extending in the four directions of the connecting piece (21) up, down, left, and right are respectively connected with the corresponding upper gabion frame (12) , the lower gabion frame (13), the left gabion frame (10), and the right gabion frame (11) are in contact with each other, and the center of the side slope and the connector (21) is connected by soil nails (26), and the four gabion frames The frames are connected to form a whole; The drainage system includes drainage ditches (2) at the slope side and at the foot of the slope, intercepting ditch (1) at the top of the slope, geotextiles (6), side geotextiles (14) and drainage boards (8); The geotextile (6) covers the horizontal part (3) and the vertical part (4) of the stepped slope, and the geotextile (6) covering the upper and lower steps overlaps at the vertical part (4), A drainage board (8) is arranged between the two overlapping geotextiles (6), and the drainage board (8) is close to the vertical part (4); the horizontal part (3) has an arc-shaped sunken part (5), and the arc-shaped sunken Gravel (9) is paved on the part (5) to make the surface of the horizontal part (3) smooth; The side geotextile (14) is wrapped on the free side of the gabion frame; The top of the connector (21) is provided with an L-shaped cutout, the bottom of the upper gabion frame (12) is in contact with the L-shaped cutout, the bottom of the connector (21) is in contact with the top of the lower gabion frame (13), and the lower gabion The top of the cage frame (13) is provided with a Z-shaped baffle in longitudinal section, and the baffle is close to the front wall of the connector (21), the top of the lower gabion frame (13) and the front wall of the lower gabion frame (13), The left and right sides of the baffle extend outwards, limiting the displacement of the left gabion frame (10) and the right gabion frame (11) away from the slope; The grouting pipe (16) is L-shaped, the horizontal part of the grouting pipe (16) is parallel to the frame bottom (15) of the corresponding gabion frame, the vertical part of the grouting pipe (16) extends out of the gabion frame, and the grouting pipe (16) ) is provided with a grouting port (17) at the end protruding from the gabion frame; the horizontal part of the grouting pipe (16) is evenly distributed with a plurality of small holes with a diameter of 0.005-0.01m; The gabion frames are all composed of rectangular parallelepiped steel bar frames and gabion nets, and the gabion frames are provided with steel bar spacers (19). 2. An artificial slope assembly type flexible support ecological comprehensive treatment structure according to claim 1, characterized in that, the baffle is in close contact with the front wall of the connector (21) and the lower gabion frame (13) Ribs with a triangular longitudinal section are arranged between the tops. 3. a kind of artificial slope assembly type flexible support ecological comprehensive treatment structure according to claim 1, is characterized in that, block stone is all placed in each described gabion frame, and planting soil is distributed in the space between block stone In , plants are grown in vegetative soil. 4. An artificial slope assembly-type flexible support ecological comprehensive treatment structure according to claim 1, characterized in that, a hole (23) with a diameter of 0.05m is reserved in the upper part of the connector (21) , the entrance of the hole (23) is equipped with a hollow cylindrical metal gasket (25), and the soil below the gap (22) corresponding to the connector (21) is provided with a soil nail hole (24), a soil nail (26) Stretch in the soil nail hole (24) through the hole (23), and weld the soil nail (26) and the metal spacer (25) firmly after grouting. 5. The artificial slope assembly type flexible support ecological comprehensive treatment structure according to claim 4, characterized in that the depth of the soil nails (26) penetrating into the slope soil is 6-8m. 6. A construction method of an artificial slope assembly type flexible support ecological comprehensive treatment structure as described in any one of claims 1-5, characterized in that, it is specifically carried out in accordance with the following steps: S1: Deal with debris on the slope surface, and build drainage structures at the top, side, and foot of the slope; S2: Gradual excavation of the slope surface is carried out from the top of the slope downward to form a stepped slope with a transverse slope of 1:40; S3: The surface of the entire terraced slope; S4: Plan the position of each gabion frame, the left gabion frame (10) or the right gabion frame (11) of each gabion unit is the upper gabion frame (12) or lower gabion frame of the adjacent gabion unit frame (13), the distance between the left gabion frame (10) and the right gabion frame (11) of each gabion unit is adapted to the width of the connector (21) embedded in the gabion unit; Bury the grouting pipe (16), put the stones into the side of the upper gabion frame close to the slope body, after the filling of the side of the lower gabion frame close to the slope body is completed, put the block stones into the upper gabion frame away from the slope body inside one side; S5: After the prefabricated connector (21) is transported to the construction site, it is placed in the gap (22), and the center of the slope and the connector (21) is connected by grouting with soil nails (26), and the corresponding four gabions The frames are connected to form a whole; S6: Pour the liquid vegetation soil with plant seeds into the corresponding gabion frame through the preset grouting pipe (16) to fill the gaps between the stones, and stop pouring after the vegetation soil overflows the upper surface of the stones by 3~5cm.

Images