A geobag slope protection structure for preventing and controlling rainfall erosion

Abstract

The present invention discloses a geobag slope protection structure for preventing and controlling rainfall erosion, which is composed of interconnected inverted frustum-like geobag units. The inverted frustum-like geobag units include: an energy-removing drainage system, a stepped pressure slurry distribution system, an environmental monitoring system, and a gyro-lattice sealing system. The gyro-lattice sealing system is provided at the center of the energy-removing drainage system, a stepped pressure slurry distribution system is provided below the energy-removing drainage system, and the environmental monitoring system is provided at the bottom of the stepped pressure slurry distribution system. The present invention accelerates the drainage of the top surface of the inverted frustum-like geobag unit through the energy-removing drainage system, thereby avoiding the occurrence of rainfall stagnation on the surface of the slope soil; effectively realizes the slurry filling of different parts of the inverted frustum-like geobag unit through the stepped pressure slurry distribution system, ensures the effectiveness and density of the slope grouting, and weakens the water and soil loss of the slope soil; effectively realizes the moisture monitoring of the slope surface through the environmental monitoring system, effectively ensuring the continuous stability of the slope soil.

Description

Technical Field

[0001] The invention relates to the technical field of slope soil reinforcement, in particular to a geobag slope protection structure for preventing and controlling rainfall erosion. Background Art

[0002] my country's southeastern coastal areas are home to numerous hills. Influenced by rainfall brought by the southeast monsoon and typhoons, local rocks undergo severe weathering, resulting in the formation of unique residual soils, of which granite residual soils are the most widespread. Granite residual soils are characterized by strong structural integrity, softening upon contact with water, and high variability. This, in many ways, indicates that granite residual soil slopes are susceptible to collapse during rainfall. During heavy rainfall, deformation often occurs quickly, resulting in significant structural damage over large areas. Therefore, the search for effective methods to prevent and control the failure of granite residual soil slopes under rainfall is of great practical significance.

[0003] Currently, granite residual soil slopes are primarily protected with three-dimensional vegetation nets, mesh shotcrete, and mortared stone rubble. These methods, however, are associated with high overall investment, poor ability to limit soil erosion, and difficulty in regenerating vegetation. Geobags are a convenient and environmentally friendly method for slope reinforcement, but they pose challenges such as high labor costs, difficulty with mechanical operations, and limited regeneration of vegetation during large-scale construction. Therefore, they are generally not considered a preferred option for slope reinforcement. Chinese patent CN108708350B proposes an ecological slope protection structure and its construction method, which utilizes a geomembrane bag structure and a vegetation layer structure composed of porous ecological concrete, and reinforces the slope through self-weight compaction and the retention of the slope soil by plant roots. This reinforcement structure has the characteristics of high stability, safety, reliability, and strong anti-scouring ability. However, it does not take into account the ease of operation of the overall device during transportation and installation, the retention of top vegetation, and the problem of soil erosion under heavy rainfall conditions. In actual use, it is subject to many constraints and has certain limitations. Summary of the Invention

[0004] In response to the problems existing in the prior art, the present invention provides a geobag slope protection structure for preventing and controlling rainfall erosion, which has the advantages of weakening rainfall erosion, slowing down soil erosion, and improving the stability of slope soil under rainfall conditions.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a geobag slope protection structure for preventing and controlling rainfall erosion, which is composed of connected inverted frustum-like geobag units, and the inverted frustum-like geobag units include: an energy-saving hydrophobic system, a stepped pressure slurry separation system, an environmental monitoring system and a rotary grid sealing system. A rotary grid sealing system is provided at the center of the energy-saving hydrophobic system, a stepped pressure slurry separation system is provided below the energy-saving hydrophobic system, and the environmental monitoring system is arranged at the bottom of the stepped pressure slurry separation system.

[0006] Furthermore, the energy-cutting hydrophobic system consists of a convex point structure, a top plate and raised ribs. The convex point structure is evenly distributed on the top plate, and raised ribs are provided on the connecting line from the center to the corner point of the top plate; the top plate includes a top plate top membrane, a top plate center interlayer and a top plate bottom membrane connected in sequence, the top plate top membrane and the top plate bottom membrane are both hydrophobic fabrics, and the top plate center interlayer is a water-blocking fabric.

[0007] Furthermore, the stepped pressure grouting system consists of a top annular grouting pipe system, an L-shaped side angle grouting passage, a bottom flow net device and a side wall. The top annular grouting pipe system is arranged annularly along the top plate. The top annular grouting pipe system and the bottom flow net device are fixedly connected through the side wall. An L-shaped side angle grouting passage is provided at the corner point of the side wall. The L-shaped side angle grouting passage connects the top annular grouting pipe system and the bottom flow net device.

[0008] Furthermore, the top annular grouting flower pipe system includes: a lateral connecting device, a vertical slurry outlet device, and a grouting flower pipe pipeline. A lateral connecting device is provided in the middle of the grouting flower pipe pipeline, and the lateral connecting device connects two adjacent inverted cone geobag units; a vertical slurry outlet device is provided at the bottom of the grouting flower pipe pipeline; the grouting flower pipe pipeline is connected to the upper end of the L-shaped side angle grouting passage.

[0009] Furthermore, the lateral connecting device includes: a connecting pipe, a bayonet, a docking wall, a lock, a water-blocking rubber strip, and a locking groove. One end of the connecting pipe of two adjacent inverted frustum-like geotextile bags is respectively connected to the corresponding grouting flower pipe pipeline. The docking wall is the side wall of the connecting pipe. The bayonet is arranged on the inner side of the docking wall of one inverted frustum-like geotextile bag. The locking groove is arranged on the connecting pipe of the other inverted frustum-like geotextile bag. A water-blocking rubber strip is provided between the locking groove and the connecting pipe. The lock is located on the inner wall of the locking groove, and the lock is engaged with the bayonet.

[0010] Furthermore, the vertical slurry discharge device includes: a carbon steel spring steel constraint support, a lower sealing plate and a slurry outlet. The grouting flower pipe pipeline is opened with a slurry outlet, the outer side of the slurry outlet is provided with a lower sealing plate, the inner side of the slurry outlet is provided with a carbon steel spring steel constraint support, the carbon steel spring steel constraint support is divided into a straight segment and a curved segment, one end of the straight segment is fixedly connected to the inner wall of the grouting flower pipe pipeline, the other end of the straight segment is fixedly connected to one end of the curved segment, and the other end of the curved segment is engaged with the lower sealing plate; the area of ​​the lower sealing plate is larger than the area of ​​the slurry outlet.

[0011] Furthermore, the bottom flow network device includes: a point-dispersed slurry distribution port, a flow trough, and a support body. The corner points of the bottom flow network device are point-dispersed slurry distribution ports, and the parts other than the corner points are composed of flow troughs and support bodies; the point-dispersed slurry distribution port is connected with the flow trough; a slurry infiltration plate is provided on the flow trough, and the slurry infiltration plate is arranged along the flow direction of the flow trough, and deformation lines are provided on the slurry infiltration plate; the point-dispersed slurry distribution port is connected with the lower end of the L-shaped side angle grouting passage.

[0012] Furthermore, the side wall is composed of a side wall outer membrane, an interlayer low-rigidity support body, and a side wall inner membrane connected in sequence, and both ends of the interlayer low-rigidity support body are respectively connected to the side walls of the L-shaped side angle grouting passage.

[0013] Furthermore, the environmental monitoring system is arranged at the lower part of the support body, and the environmental monitoring system consists of four moisture monitoring sensors, which are evenly distributed on the support body; the bottom flow network device and the environmental monitoring system are located between the bottom top membrane and the bottom bottom membrane.

[0014] Furthermore, the rotary grid sealing system consists of a rotary grid sealing piece unit, a fixed port and a filling port. The filling port is located at the center of the top plate. A fixed port is provided at the filling port. The rotary grid sealing piece unit is slidably connected to the fixed port. When the fixed port is opened, the rotary grid sealing piece unit spreads to the edge of the fixed port, and the fixed port is connected to the filling port. When the fixed port is closed, the rotary grid sealing piece unit converges at the center of the fixed port, and the fixed port is blocked from the filling port.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The geobag slope protection structure for preventing rainfall erosion in this invention uses inverted frustum-shaped geobag units for filling and protecting the slope. Compared with traditional geobags, the load per unit area of ​​the geobag body on the slope soil surface is effectively increased, thereby increasing the pressure on the entire slope, increasing the friction coefficient between slope soil particles, and improving the slope soil strength. At the same time, the inverted frustum-shaped geobag unit structure, with a larger upper portion and a smaller lower portion, effectively improves the rainwater interception capacity of the slope soil and reduces the area of ​​the slope soil directly eroded by rainwater.

[0017] 2. The geobag slope protection structure for preventing and controlling rainfall erosion of the present invention is provided with a stepped pressure grouting system, the external grouting pipe is connected to the lateral connection device, the reinforcement slurry is injected into the stepped pressure grouting system, and the reinforcement slurry is transported by the grouting flower pipe and the L-shaped side angle grouting passage. With the help of the vertical grouting system and the bottom flow network system, the slurry discharge of the reinforcement slurry of different pressures is controlled, and graded grouting of different areas under different pressure conditions is realized; at the same time, with the help of the early-setting and fast-setting reinforcement slurry, the mixed condensation of the slope soil particles and the reinforcement slurry and the filling of the holes and gaps between adjacent geobags are effectively achieved, thereby improving the c of the slope soil itself, value, achieving stable reinforcement of the slope soil and enhancing the strength and overall stability of the slope soil;

[0018] 3. The energy-saving and water-draining system of the geobag slope protection structure for preventing and controlling rainfall erosion of the present invention realizes the rapid drainage of rainwater under rainfall conditions through the top plate structure with a high center, low four sides and a bulge at the diagonal compared with the two sides. At the same time, it works together with the external water-repellent layer and the interlayer water-blocking layer of the top plate to further enhance the rapid drainage capacity of the top plate for rainfall, and effectively avoids the problem that the continuous retention of rainwater on the surface of the bag after rainfall causes a large amount of rainwater to penetrate into the geobag, resulting in an increase in the moisture content of the slope soil and a reduction in the service life of the geobag; through the convex point structure on the top plate, before the raindrops finally come into contact with the geobag, It effectively realizes multi-stage energy dissipation, greatly reduces the impact of raindrops on the geobag body, and extends the service life of the geobag. At the same time, the convex point structure can effectively realize the conversion of rainwater from the transitional flow state to the turbulent flow state on the top plate, effectively improving the overall drainage rate. At the same time, the vertical slurry discharge device of the stepped pressure grouting system injects slurry into the individual geobags within a certain pressure range, thereby strengthening the slope soil and filling the gaps and pores between adjacent geobags, effectively isolating the slope soil from external rainfall, further improving the anti-scouring ability of the slope soil surface, and ensuring the overall stability of the slope.

[0019] 4. The lateral connection device of the present invention provides convenient and flexible slurry delivery and injection. Through the locking bayonet structure and the fit of the locking groove with water-blocking rubber strips with the docking wall, a stable multi-directional constraint is generated on the lateral connection port, ensuring a tight fit between the connecting pipes of adjacent geobags, effectively preventing slurry leakage and seepage during the injection process, and ensuring the transmission capacity of the reinforcement slurry.

[0020] 5. The present invention sets up an environmental monitoring system, which effectively realizes the digital real-time monitoring of the water content of the interface between the slope soil surface and the base membrane, realizes dynamic perception of the slope soil interface conditions, and provides a guarantee for the overall stability analysis of the slope soil structure during and after rainfall. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an overall schematic diagram of the geobag slope protection structure for preventing and controlling rainfall erosion according to the present invention, wherein: Figure 1 A in the figure is a schematic diagram of the arrangement of the inverted frustum geobag unit. Figure 1 B in the figure is a schematic diagram of an inverted frustum-type geobag unit;

[0022] Figure 2 Schematic diagram of the structure of the energy-reducing hydrophobic system of the present invention, wherein: Figure 2 A in the figure is the axonometric diagram of the energy-saving hydrophobic system. Figure 2 B in the figure is a top view of the energy-saving drainage system. Figure 2 C in the figure is a cross-sectional diagram of the energy-reducing hydrophobic system. Figure 2 D in the figure is a schematic cross-sectional view of the bump structure monomer and the top plate structure;

[0023] Figure 3 This is a schematic diagram of the top annular grouting pipe system in the stepped pressure grouting system of the present invention, wherein: Figure 3 A in the figure is the side view of the grouting of the top annular flower pipe system. Figure 3 B in the figure is a top view of the vertical pulp discharge device. Figure 3 C in the figure is a cross-sectional view of the vertical pulp discharge device. Figure 3 D in FIG. 1 is a cross-sectional view of the lateral connecting device;

[0024] Figure 4 Schematic diagram of the upper structure of the stepped pressure slurry separation system of the present invention, wherein: Figure 4 A in the figure is a top view of the connection between the top annular grouting pipe system and the L-shaped side angle grouting channel. Figure 4 B in the figure is a cross-sectional view of the connection between the top annular grouting pipe system and the L-shaped side angle grouting passage. Figure 4 C in the figure is the cross-sectional view of the connection between the side wall and the L-shaped side corner grouting passage. Figure 4 D in FIG is a schematic diagram of the side wall structure;

[0025] Figure 5 It is a schematic diagram of the lower structure of the stepped pressure slurry separation system of the present invention. Figure 4 A in the figure is the axial schematic diagram of the connection between the L-shaped side angle grouting channel and the bottom flow network system. Figure 4 Figure B is a top view of the connection between the L-shaped side angle grouting channel and the bottom flow network system. Figure 4 Figure C is a cross-sectional diagram of the connection structure between the L-shaped side angle grouting channel and the bottom flow network system;

[0026] Figure 6 is a schematic diagram of the bottom flow net device in the present invention, wherein: Figure 6 A in the figure is the isometric view of the bottom flow net device. Figure 6 B in the figure is a cross-sectional view of the bottom flow net device. Figure 6 C in the figure is a top view of the bottom flow net device. Figure 6 D is a top view of the flow channel, support body and its auxiliary structures;

[0027] Figure 7 This is a schematic diagram of the bottom flow network and environmental monitoring system layout in the present invention, wherein: Figure 7 A in the figure is a top view of the environment monitoring system layout. Figure 7 B in the figure is a cross-sectional view of the layout of the flow network and environmental monitoring system;

[0028] Figure 8 It is a structural diagram of the rotary grid sealing system of the present invention, wherein: Figure 8 A in the figure is the isometric view of the spiral sealing system. Figure 8 B in the figure is a cross-sectional view of the screw-type sealing system. Figure 8 The C in the figure is a top view of the spiral sealing system. Figure 8 D in the figure is a schematic diagram of the position relationship between the grid sealing piece and the filling port at each stage;

[0029] Among them, 1-energy-cutting hydrophobic system; 11-convex point structure; 12-top plate; 13-raised ribs; 511-top plate top membrane; 512-top plate center interlayer; 513-top plate bottom membrane; 2-stepped pressure slurry distribution system; 21-top annular grouting flower pipe system; 211-lateral connection device; 2111-connecting pipe; 2112-bayonet; 2113-butting wall; 2114-lock; 2115-water-blocking rubber strip; 2116-locking groove; 212-vertical slurry discharge device; 2121-carbon steel spring steel constraint support; 2122-lower sealing plate; 2123-slurry discharge port ;213-grouting flower pipe pipeline;22-L-shaped side angle grouting passage;23-bottom layer flow network device;231-scattered slurry distribution port;232-flow trough;2321-slurry seepage plate;23211-deformation pattern;233-support body;2331-turbulence tip;24-side wall;521-side wall outer membrane;522-side wall inner membrane;523-sandwich low-rigidity support body;3-environmental monitoring system;31-moisture monitoring sensor;4-spindle sealing system;41-spindle sealing piece monomer;42-fixing port;43-filling port;531-bottom layer top membrane;532-bottom layer bottom membrane. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0031] Example

[0032] like Figure 1A and B in the figure, the present invention provides a geobag slope protection structure for preventing and controlling rainfall erosion, which is composed of connected inverted frustum-like geobag units. The inverted frustum-like geobag units in the present invention are composed of an inverted frustum-like structure consisting of four edges with equidistant side edges and a top plate with a high center and four low sides. Due to the structural characteristics of the inverted frustum-like top surface and a small bottom surface, it can form a structure similar to an umbrella support while ensuring the stability of the overall structure, effectively reducing the direct contact area between rainwater and the lower slope soil, blocking rainwater to a certain extent, weakening the impact and damage of rainfall on the slope surface soil, and thus improving the stability of the slope. The inverted frustum-shaped geobag unit in the present invention includes: an energy-saving drainage system 1, a stepped pressure slurry separation system 2, an environmental monitoring system 3 and a lattice sealing system 4. The lattice sealing system 4 is provided at the center of the energy-saving drainage system 1, and the stepped pressure slurry separation system 2 is provided below the energy-saving drainage system 1. The environmental monitoring system 3 is arranged at the bottom of the stepped pressure slurry separation system 2 to realize real-time monitoring of the moisture content of the slope soil. The present invention effectively extends the service life of the inverted frustum-like geobag unit through the energy-cutting and water-draining system 1, accelerates the drainage of the top surface of the inverted frustum-like geobag unit, reduces soil and water loss, avoids the occurrence of rainwater siltation, ensures the stability of the slope soil, and thus improves the anti-scouring efficiency of the slope soil; through the stepped pressure slurry distribution system 2 instead of the traditional diffuse filling form, effectively realizes the slurry injection of different parts of the inverted frustum-like geobag unit, realizes the rapid and effective reinforcement of the slope soil, improves the engineering construction efficiency and convenient operability, and reduces manpower consumption and construction loss; through the rotary sealing system 4, the rapid filling and sealing of the inside of the inverted frustum-like geobag unit is realized, thereby improving the overall construction efficiency and reducing material loss.

[0033] The energy-removing hydrophobic system 1 of the present invention is composed of a convex point structure 11, a top plate 12 and a convex rib 13, as shown in FIG. Figure 2In the AC, the convex structure 11 is evenly distributed on the top plate 12, and a raised rib 13 is provided on the connecting line from the center to the corner point of the top plate 12, forming a structure with a high center and low sides. This can achieve rapid drainage of the surface of the inverted frustum-like geobag unit, avoid the phenomenon of rainwater gathering on the surface of the top plate for a long time, reduce the infiltration of rainwater into the inverted frustum-like geobag unit, thereby reducing the moisture content of the slope soil during rainfall, and improving the compaction and reinforcement effect of the inverted frustum-like geobag unit on the slope soil. Under rainfall conditions, the convex structure 11 first comes into contact with rainwater, destroying the original raindrop structure and splitting it into multiple small raindrops, thus achieving the first step of energy dissipation. At this time, the viscous resistance between the raindrop and the convex structure 11 is increased, and an umbrella-shaped water film barrier is formed around the convex structure 11 in a short period of time, which has a certain weakening effect on the falling raindrops, thus achieving the second step of energy dissipation, thereby reducing the impact and damage of raindrops on the top plate of the part without the convex structure under rainfall conditions, and extending the service life of the inverted frustum-shaped geobag unit; at the same time, under rainfall conditions, the convex structure 11 has a certain blocking effect on the downward convergence of raindrops along the slope of the geobag top plate under the action of gravitational potential energy, and the flow path of the microscopic fluid particles in the flow field is changed, and the fluid flow state is changed from a transitional flow state to a turbulent flow state, the flow velocity is increased, and thus the overall drainage rate of the top plate is improved. Figure 2 In D, the top plate 12 includes a top plate top membrane 511, a top plate center interlayer 512 and a top plate bottom membrane 513 connected in sequence. The top plate top membrane 511 and the top plate bottom membrane 513 are both hydrophobic fabrics, which effectively improve the drainage rate of water on the surface of the top plate 12. The top plate center interlayer 512 is a water-blocking fabric, which makes the top plate 12 have certain water-blocking and anti-seepage properties. The two cooperate with each other to ensure that the soil inside the inverted frustum-like geobag unit is in a relatively dry working environment, effectively avoiding the deformation, instability and damage of the soil inside the inverted frustum-like geobag unit after encountering water.

[0034] like Figure 4 AB and Figure 5C in the figure, the stepped pressure grouting system 2 in the present invention is composed of a top annular grouting pipe system 21, an L-shaped side angle grouting passage 22, a bottom flow net device 23 and a side wall 24. The top annular grouting pipe system 21 is arranged annularly along the top plate 12, and the top annular grouting pipe system 21 and the bottom flow net device 23 are fixedly connected through the side wall 24. An L-shaped side angle grouting passage 22 is provided at the corner point of the side wall 24, and the L-shaped side angle grouting passage 22 connects the top annular grouting pipe system 21 and the bottom flow net device 23. The top annular grouting tube system 21 in the present invention connects the geobag units to realize the transportation of reinforcement slurry between the bags; the L-shaped side angle grouting passage 22 ensures that the reinforcement slurry can be effectively and quickly transferred from the top annular grouting tube system 21 to the bottom flow net device 23. The oblique angle arrangement of the L-shaped side angle grouting passage 22 avoids the slurry from falling quickly in the vertical arrangement and causing slurry structure disturbance, thereby ensuring the quality of the reinforcement slurry and thus ensuring the overall reinforcement effect; the bottom flow net device 23 evenly distributes the reinforcement slurry moved downward by the L-shaped side angle grouting passage 22.

[0035] like Figure 3 A in the figure, the top annular grouting tube system 21 of the present invention includes: a lateral connecting device 211, a vertical slurry discharge device 212, and a grouting tube pipeline 213. A lateral connecting device 211 is provided in the middle of the grouting tube pipeline 213, and the lateral connecting device 211 connects two adjacent inverted frustum-like geobag units; a vertical slurry discharge device 212 is provided at the bottom of the grouting tube pipeline 213, which grouts the soil between the inverted frustum-like geobag units, and realizes constant pressure slurry discharge of the reinforcement slurry through the vertical slurry discharge device 212, thereby realizing the organic connection between the bags and the convenient filling of the reinforcement slurry, and realizing the simultaneous operation and slurry discharge of the vertical slurry discharge system between the geobag units; the grouting tube pipeline 213 is connected to the L-shaped side angle grouting passage 22, and utilizes the vertical potential energy of the reinforcement slurry itself and the slurry convergence form of multi-directional slurry to realize the efficient transfer of the reinforcement slurry.

[0036] like Figure 3D in the figure, the lateral connecting device 211 includes: a connecting pipe 2111, a bayonet 2112, a docking wall 2113, a lock 2114, a water-blocking rubber strip 2115, and a locking groove 2116. One end of the connecting pipe 2111 of two adjacent inverted frustum-like geotextile bags is respectively connected to the corresponding grouting flower pipe pipeline 213, the docking wall 2113 is the side wall of the connecting pipe 2111, the bayonet 2112 is arranged on the inner side of the docking wall 2113 of one inverted frustum-like geotextile bag, and the locking groove 2116 is arranged on the connecting pipe 2111 of the other inverted frustum-like geotextile bag. A water-blocking rubber strip 2115 is provided between the locking groove 2116 and the connecting pipe 2111, and the lock 2114 is located on the inner wall of the locking groove 2116, and the lock 2114 is engaged with the bayonet 2112. Through the restraining effect of the lock 2114 and the bayonet 2112, and the water-blocking and anti-seepage effect of the locking groove 2116 of the external water-blocking rubber strip 2115, the vertical and horizontal spatial constraints of the lateral connecting device are achieved, thereby realizing the closed connection of the pipelines between adjacent inverted cone geobags, thereby realizing the through-flow and convergence of the reinforcement slurry, avoiding the relative movement of the connecting pipe 2111 to create gaps, causing the reinforcement slurry to seep out, and affecting the transfer and transportation effect of the reinforcement slurry in adjacent geobags.

[0037] like Figure 3 B and C in the figure, the vertical slurry discharge device 212 includes: a carbon steel spring steel restraint support 2121, a lower sealing plate 2122 and a slurry outlet 2123. A slurry outlet 2123 is opened on the grouting flower tube pipeline 213. A lower sealing plate 2122 is provided on the outer side of the slurry outlet 2123, and a carbon steel spring steel restraint support 2121 is provided on the inner side of the slurry outlet 2123. The carbon steel spring steel restraint support 2121 is divided into a straight section and a curved section. One end of the straight section is fixedly connected to the inner wall of the grouting flower tube pipeline 213, and the other end of the straight section is fixedly connected to one end of the curved section, and the other end of the curved section is engaged with the lower sealing plate 2122. The area of ​​the lower sealing plate 2122 is larger than the area of ​​the slurry outlet 2123. When the preset pressure is not reached, the carbon steel spring steel restraint support 2121 constrains the lower sealing plate 2122, keeping the grouting outlet 2123 closed. When the preset grouting pressure is reached, the carbon steel spring steel restraint support 2121 deforms downward, separating the lower sealing plate 2122 from the outer wall of the grouting flower pipe 213, and the grouting outlet 2123 begins to slurry outward. The elastic restraint of the carbon steel spring steel restraint support 2121 on the lower sealing plate 2122 effectively ensures that the lower sealing plate 2122 and the outer wall of the grouting flower pipe 213 remain in close contact when the preset grouting pressure is not reached, achieving stepped pressure grouting and ensuring the grouting effect.

[0038] like Figure 5 AB in and Figure 6In the AD, the bottom flow net device 23 includes: a scattered slurry outlet 231, a flow channel 232, and a support body 233. The turbulence tip 2331 is a triangular prism extending from the support body 233 into the flow channel 232. The spacing between adjacent turbulence tips 2331 is consistent. The turbulence tips 2331 on both sides of the flow channel 232 are staggered. The fluid is mixed and becomes turbulent after being subjected to irregular obstruction, and the turbulent flow is not easily blocked, thereby ensuring that the internal particles of the reinforcement slurry in the flow channel 232 do not stick during the slurry spreading process. The phenomenon of connection is realized, thereby achieving the phenomenon of hardening and blocking in the process of slurry filling, ensuring the smooth flow of the flow channel 232; the corner points of the bottom flow network device 23 are the scattered slurry outlets 231, and the part other than the corner points is composed of the flow channel 232 and the support body 233; the scattered slurry outlet 231 is connected to the flow channel 232; the flow channel 232 is W-shaped, and a slurry seepage plate 2321 is provided on the flow channel 232, and the slurry seepage plate 2321 is arranged along the flow direction of the flow channel 232, and the bottom reinforcement slurry is achieved with the help of the slurry seepage plate 2321 The constant pressure seepage realizes the uniform arrangement of the reinforcement slurry at the bottom of the geobag, and at the same time, the U-tube principle is used to realize the simultaneous operation of the bottom slurry plate between the geobag units; the slurry plate 2321 is provided with a deformation line 23211, and the deformation line 23211 is arranged along the diagonal line of the slurry plate 2321. The slurry plate 2321 takes the diagonal line as the axis, and one side is connected to the flow channel 232, and the other side is provided with a slit and is not connected to the flow channel 232. Under the uniform pressure of the upper reinforcement slurry, the slurry After reaching the grouting pressure, the plate 2321 deforms at a predetermined angle according to the deformation lines 23211, thereby causing misalignment deformation between the grouting plate 2321 and the flow channel 232, thereby ensuring that the reinforcement slurry in the flow channel 232 can effectively seep out through the grouting plate 2321, achieving the effect of slope reinforcement and water infiltration prevention; when the deformation condition is not reached, the overall plane remains horizontal, and the grouting plate 2321 and the flow channel 232 maintain a seamless fit, ensuring that the reinforcement slurry does not seep out prematurely and avoiding the occurrence of drainage obstruction. The point-dispersed grouting port 231 is connected to the lower end of the L-shaped side angle grouting channel 22, realizing the utilization of the potential energy of the reinforcement slurry during the downward transportation process, effectively ensuring that the reinforcement slurry transported by the L-shaped side angle grouting channel 22 is evenly distributed to the flow channels 232 in all directions, thereby achieving uniform grouting on the slope surface, improving the slope soil surface reinforcement effect, and forming an effective constraint on the slope surface soil.

[0039] like Figure 4 In the CD, the sidewall 24 is composed of a sidewall outer membrane 521, a low-rigidity sandwich support 523, and a sidewall inner membrane 522, which are connected in sequence. The two ends of the low-rigidity sandwich support 523 are connected to the side walls of the L-shaped side corner grouting passage 22. The low-rigidity sandwich support 523 is made of a deformable plastic with a certain degree of rigidity, which constrains the shape of the sidewall 24 and ensures the structural stability of the sidewall 24.

[0040] like Figure 7In A, the environmental monitoring system 3 is used to realize real-time monitoring of the moisture content of the slope soil surface. The environmental monitoring system 3 is set at the lower part of the support body 233. The environmental monitoring system 3 is composed of four moisture monitoring sensors 31, and the moisture monitoring sensors 31 are evenly distributed on the support body 233; Figure 5 C and Figure 7 In B, the bottom flow net device 23 and the environmental monitoring system 3 are located between the bottom top membrane 531 and the bottom bottom membrane 532. The bottom bottom membrane 532 has strong permeability, which ensures the permeability of the reinforcement slurry in the flow channel while protecting the various structures of the bottom layer. The moisture monitoring sensor 31 is located at the midpoint of the vertical line passing through the center of the bottom bottom membrane 532 and the line connecting the corner points of the bottom plate, and is located at the lower part of the support body 233. After the geobag is filled, the weight of the bag body effectively ensures that the moisture monitoring sensor 31 fits tightly with the slope soil. At the same time, the multi-point layout effectively ensures the low error and authenticity of the data, thereby truly realizing the real-time, long-term and digital monitoring of the slope surface soil before and after reinforcement.

[0041] like Figure 8 AC in, the rotary grid sealing system 4 is composed of a rotary grid sealing piece monomer 41, a fixed port 42 and a filling port 43. The filling port 43 is located at the center of the top plate 12. The filling port 43 is provided with a fixed port 42. The rotary grid sealing piece monomer 41 is slidably connected to the fixed port 42; Figure 8 In the figure D, the spiral grid sealing piece monomer 41 is in the shape of a fish fin. When the fixed port 42 is opened, the spiral grid sealing piece monomer 41 spreads to the edge of the fixed port 42, and the fixed port 42 is connected to the filling port 43, which is used to fill the interior of the inverted frustum geobag unit, ensuring that the filling process is not obstructed, improving the work efficiency of the filling stage, and realizing artificial control of the material exchange inside and outside the geobag, effectively avoiding the occurrence of filling material seepage, and ensuring the working efficiency of the geobag; when the fixed port 42 is closed, the spiral grid sealing piece monomer 41 converges at the center of the fixed port 42, and the fixed port 42 is blocked from the filling port 43, providing a more suitable working environment for the filling objects inside the geobag, and ensuring the actual working effect of the geobag on slope reinforcement.

[0042] The working process of the present invention is as follows: according to the structural connection relationship and component appearance of the present invention, a quasi-inverted frustum geobag is made and internal filling is realized through a rotary grid sealing system 4. During filling, the rotary grid sealing system 4 is opened by twisting the fixed port 42. After the filling is completed, the rotary grid sealing system is closed by twisting the fixed port 42. After the filling is completed, the overall structure presents an inverted frustum shape. After the above operation is completed, the filled quasi-inverted frustum geobag is placed at a predetermined position on the slope according to the construction steps. After compaction, stepped pressure grouting is performed through the lateral connection device 211 in the top annular grouting flower pipe system 21 of the stepped pressure grouting system 2. The initial grouting pressure is controlled before the pressure required for the grouting plate 2321 in the flow trough 232 of the bottom flow net device 23 to undergo dislocation deformation. After the reinforcement slurry completely fills each geobag unit, the second phase grouting is performed. The second phase grouting pressure is controlled at the bottom flow net. The grouting plate 2321 in the trough 232 of the device 23 is just between the pressure required for the displacement deformation and the maximum un-discharged pressure of the vertical grouting device 212 in the top annular grouting flower tube system 21. After the grouting work of the bottom flow net device 23 is completed, the grouting pressure is increased, and the vertical grouting device 212 in the top annular grouting flower tube system 21 begins to discharge grout. After the reinforcement slurry is reinforced to a preset height, the grouting work is completed. At this time, the moisture monitoring sensor 31 in the bottom environmental monitoring system 3 of the inverted frustum geobag begins to work. Under rainfall conditions, the energy-reducing drainage system 1 begins to work, and the various components of the energy-reducing drainage system 1 achieve rapid drainage of water and water-blocking and anti-seepage. In conjunction with the reinforced slurry surface formed on the slope surface by the stepped pressure grouting system 2, it comprehensively reduces the impact of rainwater on the slope surface and the amount of rainwater infiltration on the slope surface, ultimately achieving the reinforcement of the slope soil and improving the slope soil's anti-scouring ability under rainfall.

[0043] Comparative Example 1

[0044] The difference from the embodiment is that: the energy-saving drainage system 1 without a convex point structure is adopted to achieve drainage of the top structure.

[0045] The inverted truncated cone geobags of Example and Comparative Example 1 were placed on the slope of a model box to test the effect of the presence or absence of a convex point structure on the hydrophobic rate and the reduction in top surface strength in the energy-reducing hydrophobic system 1. Example and Comparative Example 1 were numbered and labeled respectively. According to the operating standard, 5cm*20cm samples were taken to measure the fabric breaking strength. Then, according to the recommended construction method, they were placed on the slopes with the same conditions. A rainfall simulation device was used, with the rainfall intensity set to "weak-strong-medium-weak" in the order of 15 minutes per rainfall cycle, with a 15-minute interval between each two rainfall cycles. Multiple cycles of rainfall simulation with different intensities were performed. After 10, 20, and 50 cycles, the rainwater residual rate on the bag surface was measured, and samples were taken to measure the fabric breaking strength. The samples were then analyzed and processed. The experimental results are shown in Tables 1 and 2.

[0046] Table 1: Slope hydrophobicity results using different bump structures in Example 1 and Comparative Example 1

[0047]

[0048] Table 2: Strength attenuation results of surface fabrics with different bump structures in Example 1 and Comparative Example 1

[0049]

[0050]

[0051] From the analysis of the test results in Table 1, it can be seen that when the number of rainfall cycles is not high, the effect of the energy-removing hydrophobic system convex structure arrangement in the embodiment is very similar to the effect of the energy-removing hydrophobic system convex structure arrangement in Comparative Example 1. However, as the number of rainfall cycles increases, the rainwater retention rate and the rainwater retention rate increment obtained by using the energy-removing hydrophobic system convex structure arrangement in the embodiment are significantly lower than the two values ​​in Comparative Example 1, indicating that under the action of long-term and multiple rainfall cycles, the energy-removing hydrophobic system convex structure can effectively reduce the rainwater retention rate, slow down the growth rate of the rainwater retention rate, and avoid the occurrence of water accumulation on the bag surface. From the analysis of the test results in Table 2, it can be seen that the fabric breaking strength in the embodiment is significantly higher than that shown in Comparative Example 1, and the growth rate of the fabric breaking strength in the embodiment is significantly lower than that shown in Comparative Example 1, indicating that under the action of long-term and multiple rainfall cycles, the energy-removing hydrophobic system convex structure can effectively reduce the fabric strength attenuation rate, reduce the impact loss of rainfall on the top structure of the geobag, extend the service life of the overall structure, and achieve high-efficiency utilization of the structure.

[0052] Comparative Example 2

[0053] The difference from the embodiment is that a flat top plate structure and a traditional structure geobag are used to achieve slope reinforcement.

[0054] The inverted truncated cone geobags of Example 1 and Comparative Example 2 were placed in a model box slope to test the surface hydrophobic effect and the effect of limiting slope soil scouring of geobag structures with different top plate structures and different shapes. A total of 3 groups of samples in Example 1 and Comparative Example 2 were numbered. Comparative Example 2-A was a quasi-inverted truncated cone geobag with a flat top plate, and Comparative Example 2-B was a geobag with a traditional structure with a flat top. Without grouting reinforcement, they were arranged on the slopes with the same conditions according to the recommended construction method. The three groups were isolated from each other, and a rainfall simulation device was used to simulate rainfall of medium intensity for 60 minutes. This was repeated 5 times with an interval of 15 minutes. The surface runoff water of the slope after the simulated rainfall was collected and allowed to stand. The rainwater residual rate on the bag surface and the sediment content in the surface runoff water were evaluated and analyzed respectively. The experimental results are shown in Table 3. Table 3: Results of rainwater residue rate on bag surface and sediment content in surface runoff water using different top plate structures and geobag structures of different shapes in Example 2 and Comparative Example 2

[0055]

[0056]

[0057] From the analysis of the test results in Table 3, it can be seen that under the action of moderate intensity rainfall, the rainwater retention rate of the top plate structure and the geobag structure of the embodiment is significantly lower than that presented in Comparative Example 2-A and Comparative Example 2-B, and the increase in the rainwater retention rate under the condition of repeated rainfall in a short period of time is significantly better than that presented in Comparative Example 2-A and Comparative Example 2-B, which effectively shows that under the action of rainfall, the use of a top plate with a high center, low four sides, and a raised structure at the diagonal compared to the two sides can reduce the amount of rainwater residue on the surface of the geobag, effectively weaken the infiltration of water into the geobag and the slope, weaken the change of soil structure in the geobag due to water infiltration, and effectively avoid the instability of the slope structure caused by the reduction of the reinforcement capacity of the geobag and the increase of the water content of the slope soil. At the same time, analysis of the results in Table 3 shows that under the action of the first rainfall and the second rainfall, the protective effect of the structure in the embodiment on the surface soil layer of the slope is most obvious compared with Comparative Example 2-A and Comparative Example 2-B, indicating that the use of a top plate structure with a high center, low four sides, and a raised top plate at the diagonal compared to the two sides, and an inverted frustum-like shape structure can effectively weaken the direct scouring effect of rainfall on the surface soil of the slope, reduce the amount of sediment entrained in the runoff water on the surface of the slope, and achieve an improvement in the anti-scouring ability of the slope soil.

[0058] Comparative Example 3

[0059] The difference from the embodiment is that: equalizing pressure grouting and cast-in-place grouting are respectively adopted as grouting forms to achieve the purpose of reinforcing the slope body.

[0060] The inverted truncated cone geobags of Example and Comparative Example 3 were placed on the slope of the model box to test the slope reinforcement effect and construction ease of different grouting forms. The three groups of samples in Example and Comparative Example 3 were numbered. Comparative Example 3-A was a grouting reinforcement form using equal pressure grouting, and Comparative Example 3-B was a grouting reinforcement form using cast-in-place grouting. The Example and Comparative Example 3-A were respectively arranged on the slopes with the same conditions according to the recommended construction method, and the grouting pipes were connected at fixed positions, and grouting was carried out according to the set plan; Comparative Example 3-B arranged the geobag body on the slope with the same conditions as the Example and Comparative Example 3-A according to the recommended construction method, supported the formwork, and poured the reinforcement slurry. During grouting, each group was blocked to avoid mutual influence. After the grouting reinforcement was completed, the surface treatment of the reinforcement slurry and the construction efficiency were evaluated and analyzed respectively. The experimental results are shown in Table 4.

[0061] Table 4: Surface treatment of consolidation slurry and construction efficiency evaluation using different grouting methods in Example 3 and Comparative Example 3

[0062]

[0063]

[0064] From the test results in Table 4, it can be seen that, under the same structural layout and other aspects, the grouting effect achieved by the stepped pressure grouting system in the embodiment is significantly better than that presented in Comparative Example 3-A and Comparative Example 3-B, while also effectively ensuring construction efficiency. This shows that the use of the stepped pressure grouting system for reinforcement slurry placement can effectively improve construction quality while ensuring high-efficiency construction, ensuring uniformity of the overall slope interface and low-porosity grouting, improving the reinforcement effect of the slope and the strength of the reinforced slope, further ensuring the reliability of the slope reinforcement, and effectively blocking the slope soil from external rainfall.

[0065] Comparative Example 4

[0066] The difference from the embodiment is that a flow channel without turbulence tips is used to form the bottom flow net device 23 to achieve the layout and circulation of the bottom reinforcement slurry.

[0067] The inverted frustum-like geobags of Example 1 and Comparative Example 4 were placed in a model box slope to test the fluidity of the reinforcement slurry of the bottom flow net device with different structures. Two groups of samples in Example 1 and Comparative Example 4 were numbered. In Comparative Example 4, a bottom flow net device with a non-turbulent tip was used. Example 1 and Comparative Example 4 were respectively arranged on transparent acrylic plates, connected to grouting pipes at fixed positions, and grouting was performed according to the set plan. During grouting, each group was isolated to avoid mutual influence. After the grouting reinforcement was completed, the slurry discharge conditions of each part of the bottom flow net structure and the grouting coverage rate of the slope-geobag interface were evaluated and analyzed. The experimental results are shown in Table 5.

[0068] Table 5 Evaluation of grouting conditions at various locations of the bottom flow net structure and grouting coverage at the slope-geobag interface

[0069]

[0070] From the analysis of the test results in Table 5, it can be seen that, under the same grouting method, the bottom slurry discharge effect and interface grouting coverage rate obtained by using the bottom flow net device with a turbulent tip structure in the embodiment are significantly better than those presented in Comparative Example 4. This shows that using a flow trough with a turbulent tip structure to transport the reinforcement slurry in the bottom flow net device can effectively avoid the occurrence of premature solidification and slurry blocking at the end, suppress the occurrence of a slurry-free area in the center of the bottom, provide a guarantee for a good slurry discharge effect during the grouting stage of the bottom flow net device, ensure the completeness of the slope surface reinforcement, and achieve the overall reinforcement effect of the slope and the improvement of the barrier performance between the slope and the outside world.

[0071] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the principles of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A geobag slope protection structure for preventing and controlling rainfall erosion, characterized in that: The invention is composed of interconnected inverted cone-like geobag units, wherein the inverted cone-like geobag units include: an energy-removing water-draining system (1), a stepped pressure slurry separation system (2), an environmental monitoring system (3) and a lattice sealing system (4); the lattice sealing system (4) is provided at the center of the energy-removing water-draining system (1); the stepped pressure slurry separation system (2) is provided below the energy-removing water-draining system (1); and the environmental monitoring system (3) is provided at the bottom of the stepped pressure slurry separation system (2).

2. The geobag slope protection structure for preventing and controlling rainfall erosion according to claim 1 is characterized in that: The energy-saving hydrophobic system (1) consists of a convex point structure (11), a top plate (12) and a convex rib (13); the convex point structure (11) is evenly distributed on the top plate (12); and the convex rib (13) is provided on the connecting line from the center to the corner point of the top plate (12); the top plate (12) comprises a top plate top membrane (511), a top plate center interlayer (512) and a top plate bottom membrane (513) connected in sequence; the top plate top membrane (511) and the top plate bottom membrane (513) are both hydrophobic fabrics, and the top plate center interlayer (512) is a water-blocking fabric.

3. The geobag slope protection structure for preventing and controlling rainfall erosion according to claim 1 is characterized in that: The stepped pressure grouting system (2) is composed of a top annular grouting pipe system (21), an L-shaped side angle grouting passage (22), a bottom flow net device (23) and a side wall (24). The top annular grouting pipe system (21) is arranged annularly along the top plate (12). The top annular grouting pipe system (21) and the bottom flow net device (23) are fixedly connected via the side wall (24). An L-shaped side angle grouting passage (22) is provided at a corner point of the side wall (24). The L-shaped side angle grouting passage (22) connects the top annular grouting pipe system (21) and the bottom flow net device (23).

4. The geobag slope protection structure for preventing and controlling rainfall erosion according to claim 3 is characterized in that: The top annular grouting pipe system (21) comprises: a lateral connection device (211), a vertical slurry discharge device (212), and a grouting pipe pipeline (213); a lateral connection device (211) is provided in the middle of the grouting pipe pipeline (213); the lateral connection device (211) is connected to two adjacent inverted frustum-type geobag units; a vertical slurry discharge device (212) is provided at the bottom of the grouting pipe pipeline (213); and the grouting pipe pipeline (213) is connected to the upper end of the L-shaped side angle grouting passage (22).

5. The geobag slope protection structure for preventing and controlling rainfall erosion according to claim 4 is characterized in that: The lateral connection device (211) comprises: a connection pipe (2111), a bayonet (2112), a docking wall (2113), a lock (2114), a water-blocking rubber strip (2115), and a locking groove (2116); one end of the connection pipe (2111) of two adjacent inverted frustum-like geobags is respectively connected to the corresponding grouting flower pipe (213); the docking wall (2113) is the side wall of the connection pipe (2111); the bayonet ( 2112) is arranged on the inner side of a connecting wall (2113) of a quasi-inverted frustum geotextile bag, the locking groove (2116) is arranged on the connecting pipe (2111) of another quasi-inverted frustum geotextile bag, a water-blocking rubber strip (2115) is provided between the locking groove (2116) and the connecting pipe (2111), the locking (2114) is located on the inner wall of the locking groove (2116), and the locking (2114) is engaged with the bayonet (2112).

6. The geobag slope protection structure for preventing and controlling rainfall erosion according to claim 4, characterized in that: The vertical slurry discharge device (212) comprises: a carbon steel spring steel restraint support (2121), a lower sealing plate (2122) and a slurry discharge port (2123); a slurry discharge port (2123) is provided on the grouting flower tube pipeline (213); a lower sealing plate (2122) is provided on the outer side of the slurry discharge port (2123); a carbon steel spring steel restraint support (2121) is provided on the inner side of the slurry discharge port (2123); the carbon steel spring steel restraint support (2121) is divided into a straight section and a curved section; one end of the straight section is fixedly connected to the inner wall of the grouting flower tube pipeline (213); the other end of the straight section is fixedly connected to one end of the curved section; the other end of the curved section is engaged with the lower sealing plate (2122); the area of ​​the lower sealing plate (2122) is larger than the area of ​​the slurry discharge port (2123).

7. The geobag slope protection structure for preventing and controlling rainfall erosion according to claim 3 is characterized in that: The bottom flow net device (23) comprises: a point-dispersed slurry distribution port (231), a flow trough (232), and a supporting body (233); the corner points of the bottom flow net device (23) are the point-dispersed slurry distribution ports (231), and the portion other than the corner points is composed of the flow trough (232) and the supporting body (233); the point-dispersed slurry distribution port (231) is connected to the flow trough (232); a slurry infiltration plate (2321) is provided on the flow trough (232), the slurry infiltration plate (2321) is arranged along the flow direction of the flow trough (232), and the slurry infiltration plate (2321) is provided with a deformation pattern (23211); the point-dispersed slurry distribution port (231) is connected to the lower end of the L-shaped side angle grouting passage (22).

8. The geobag slope protection structure for preventing and controlling rainfall erosion according to claim 7, characterized in that: The side wall is composed of a side wall outer membrane (521), an interlayer low-rigidity support body (523), and a side wall inner membrane (522) connected in sequence, and the two ends of the interlayer low-rigidity support body (523) are respectively connected to the side walls of the L-shaped side angle grouting passage (22).

9. The geobag slope protection structure for preventing and controlling rainfall erosion according to claim 1, characterized in that: The environmental monitoring system (3) is arranged at the lower part of the support body (233), and the environmental monitoring system (3) is composed of four moisture monitoring sensors (31). The moisture monitoring sensors (31) are evenly distributed on the support body (233); the bottom layer flow net device (23) and the environmental monitoring system (3) are located between the bottom layer top membrane (531) and the bottom layer bottom membrane (532).

10. The geobag slope protection structure for preventing and controlling rainfall erosion according to claim 1, characterized in that: The rotary grid sealing system (4) is composed of a rotary grid sealing piece monomer (41), a fixed port (42) and a filling port (43). The filling port (43) is located at the center of the top plate (12). The filling port (43) is provided with a fixed port (42). The rotary grid sealing piece monomer (41) is slidably connected to the fixed port (42); when the fixed port (42) is opened, the rotary grid sealing piece monomer (41) spreads to the edge of the fixed port (42), and the fixed port (42) is connected to the filling port (43); when the fixed port (42) is closed, the rotary grid sealing piece monomer (41) converges at the center of the fixed port (42), and the fixed port (42) is blocked from the filling port (43).

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