Composite slope protection system based on blind ditch diversion and drainage

Abstract

The utility model provides a composite slope protection system based on blind ditch diversion drainage, which comprises diversion blind ditches, longitudinal lattice ridges, transverse lattice ridges and chain type slope protection building blocks, the surface of a slope is provided with the diversion blind ditches at specified intervals, and the two sides of the diversion blind ditches are paved with arched compacted covering soil; the longitudinal grid ridges and the transverse grid ridges are arranged on the surface of the slope in a crossed mode, the two flow guide blind ditches form a pair, and one longitudinal grid ridge is arranged at the central axis of each pair of flow guide blind ditches; the longitudinal lattice bars comprise longitudinal grooves, the transverse lattice bars comprise transverse grooves, longitudinal lattice bar concrete is poured in the longitudinal grooves through first stabilizing mechanisms, and transverse lattice bar concrete is poured in the transverse grooves through second stabilizing mechanisms. The chain type slope protection building blocks are laid in units formed by intersecting and separating the longitudinal grid stems and the transverse grid stems. The water-rich sandy loam slope protection device can effectively solve the protection problem of a water-rich sandy loam slope.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, and specifically relates to a composite slope protection system based on blind ditch drainage. Background Technology

[0002] With social development and accelerated urbanization, the construction of highways, waterways, and other engineering projects is increasing. During the construction of these infrastructure projects, sandy loam slopes are often formed on both sides of the infrastructure. In areas with abundant rainfall or groundwater, these slopes become water-rich sandy loam slopes. During seasons with heavy rainfall or when disturbed, these slopes are prone to landslides, collapses, instability, and soil erosion, causing damage to highways, waterways, and other infrastructure. Therefore, it is necessary to protect the water-rich sandy loam slopes on both sides of highways, waterways, and other facilities.

[0003] When protecting slopes, the high water content and loose texture of water-rich sandy loam slopes make it difficult for workers and construction machinery to find effective working surfaces, hindering slope reinforcement. Furthermore, after the slope protection paving is completed, the varying drainage rates at different locations lead to uneven settlement under the load of the paving blocks, resulting in poor slope protection paving performance.

[0004] Therefore, there is an urgent need for a new type of composite slope protection system based on blind ditch drainage to solve the above-mentioned technical problems. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a composite slope protection system based on blind ditch drainage, comprising a blind ditch, longitudinal grids, transverse grids, and interlocking slope protection blocks, wherein...

[0006] The slope surface is provided with a drainage ditch at specified intervals, and the two sides of the drainage ditch are covered with arched compacted soil.

[0007] The longitudinal and transverse grids are intersecting on the slope surface. The two drainage blind ditches are a pair, and a longitudinal grid is provided at the central axis of each pair of drainage blind ditches.

[0008] The longitudinal grid includes a longitudinal groove, the transverse grid includes a transverse groove, the longitudinal groove is filled with longitudinal grid concrete by a first stabilizing mechanism, and the transverse groove is filled with transverse grid concrete by a second stabilizing mechanism.

[0009] The interlocking slope protection blocks are laid in units formed by the intersection and separation of longitudinal and transverse grids, and the interlocking slope protection blocks interlock with each other.

[0010] Furthermore, a blind drain sand cushion layer is laid at the bottom of the drainage blind drain, and a blind drain graded crushed stone layer is laid on the blind drain sand cushion layer. The remaining space in the drainage blind drain is backfilled with blind drain compacted soil.

[0011] Furthermore, the compacted overburden of the arched structure is laid at a specified slope and reduced in height on both sides along the longitudinal central axis of the drainage ditch.

[0012] Furthermore, the center of the square area formed by the intersection of the longitudinal grid and the transverse grid is perpendicular to the slope surface, and anti-slip anchors are provided therein, the length of which is sufficient to pass through the slip surface of the slope.

[0013] Furthermore, the first stabilizing mechanism includes a first side template, a first limiting plate, a first angled brace, and a first angled brace anchor, wherein,

[0014] The first side template is inserted into the longitudinal trench along both sides of the excavated longitudinal trench and is placed close to the longitudinal trench. The overlapping positions of the first side template are staggered in the same direction.

[0015] Multiple first limiting plates are spaced apart between each first side template;

[0016] The first angled brace is fixed to the slope surface by the first angled brace anchor. The first angled brace anchor is anchored to the soil by anchor rods, and hooks are set at the ends exposed above the ground. The first angled brace and the first angled brace anchor are set at a specified interval along the direction of the first side formwork.

[0017] Furthermore, the second stabilizing mechanism includes a second side template, a first limiting plate, a first angled brace, and a first angled brace anchor.

[0018] The second side template is inserted into the horizontal trench along both sides of the excavated horizontal trench, and the overlapping positions of the second side template are staggered in the same direction.

[0019] Multiple second limiting plates are spaced apart between each second side template;

[0020] The second angled brace is fixed to the slope surface by the second angled brace anchor. The second angled brace anchor is anchored to the soil by anchor rods, and hooks are set at the ends exposed above the ground. The second angled brace and the second angled brace anchor are set at a specified interval along the direction of the second side formwork.

[0021] Furthermore, the first side template and the second side template are spatially connected;

[0022] The inner walls of the first and second side templates are coated with concrete release agent. The longitudinal grid concrete is poured between the first side templates, and the transverse grid concrete is poured between the second side templates.

[0023] Furthermore, a capping beam is arranged at the end of the longitudinal grid, and the capping beam and the longitudinal grid are integrally cast with concrete.

[0024] Furthermore, it also includes a geotextile filter layer, wherein,

[0025] The geotextile filter layer is laid close to the surface of the slope that has been consolidated and stabilized by the drainage ditch and the longitudinal and transverse grids of the protective grid.

[0026] The interlocking slope protection blocks are laid on the geotextile filter layer of the unit. In the unit, the interlocking slope protection blocks are laid from top to bottom and from both sides to the middle. The interlocking slope protection blocks are precast concrete ballast blocks that interlock with each other by wedging.

[0027] Furthermore, it also includes drainage pipes and slope protection at the toe, among which,

[0028] The drainage pipe is installed at the bottom of the slope and is sleeved on the drainage blind ditch. The inside of the drainage pipe is filled with graded crushed stone and coarse sand, and a dense wire mesh is installed at the end of the drainage pipe.

[0029] The slope protection anchor is located at the bottom of the slope, with a designated portion buried underground and the remaining portion above ground, nested with drainage pipes.

[0030] The beneficial effects of this utility model are as follows:

[0031] This utility model provides a composite slope protection system based on blind ditch drainage. The system employs a combination of "blind ditch drainage + protective grid (vertical and transverse grids forming the protective grid) + interlocking slope protection blocks." The blind ditch drainage system facilitates organized drainage and rapidly consolidates the slope surface soil during construction, providing a working surface for slope reinforcement paving. The protective grid divides large-area slope reinforcement paving blocks into smaller units, reducing the impact of uneven settlement on the paving blocks. Simultaneously, the paving blocks utilize prefabricated interlocking slope protection blocks, strengthening the connection between blocks and increasing the overall integrity of the protection and reinforcement system. This effectively solves the protection challenges of water-rich sandy loam slopes.

[0032] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A schematic diagram of the plan layout of a slope diversion blind ditch according to an embodiment of the present invention is shown.

[0035] Figure 2 A cross-sectional schematic diagram of a drainage blind ditch according to an embodiment of the present invention is shown.

[0036] Figure 3 A schematic diagram of the plan layout of the slope protection grid according to an embodiment of the present utility model is shown;

[0037] Figure 4 A plan view of the first side template and the limiting plate according to an embodiment of the present utility model is shown;

[0038] Figure 5 A cross-sectional schematic diagram of the first inclined bracket according to an embodiment of the present invention is shown;

[0039] Figure 6 A schematic cross-sectional view of the anti-slip anchor bolt at the intersection of the protective grid according to an embodiment of the present invention is shown;

[0040] Figure 7 A plan view of a slope protection system according to an embodiment of the present invention is shown;

[0041] Figure 8 A cross-sectional schematic diagram of the slope protection toe and drainage pipe according to an embodiment of the present invention is shown. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0043] like Figure 1 As shown, this utility model provides a composite slope protection system based on blind ditch drainage, including a blind ditch 1, longitudinal grid 5, transverse grid 6, and interlocking slope protection blocks, wherein,

[0044] The slope surface is provided with a drainage ditch 1 at specified intervals, and the drainage ditch 1 is covered with arched compacted soil 4.1 on both sides;

[0045] The longitudinal grid 5 and the transverse grid 6 are intersecting on the slope surface. The two drainage blind ditches are a pair, and each pair of drainage blind ditches 1 has a longitudinal grid 5 at its central axis.

[0046] The longitudinal grid 5 includes a longitudinal groove, the transverse grid 6 includes a transverse groove, the longitudinal groove is filled with longitudinal grid concrete 5.5 by a first stabilizing mechanism, and the transverse groove is filled with transverse grid concrete 6.4 by a second stabilizing mechanism.

[0047] The interlocking slope protection blocks are laid in the unit formed by the intersection and separation of longitudinal grid 5 and transverse grid 6, and the interlocking slope protection blocks interlock with each other.

[0048] The present invention will now be described in detail.

[0049] In some embodiments of this utility model, to quickly consolidate the slope surface soil during construction, providing a working surface for slope reinforcement paving construction, and simultaneously avoiding uneven settlement of the slope paving system caused by different drainage consolidation rates at different locations of the slope under the ballast of the interlocking slope protection blocks 10, thus preventing damage to the integrity of the slope protection system, and considering the drainage of slope waterlogging caused by rainfall during later maintenance to ensure the long-term overall stability of the slope, a drainage structure consisting of a permanent and temporary combined drainage ditch 1 is adopted, such as... Figure 1 As shown, a drainage ditch 1 (exemplary, drainage ditch 1 is 60cm deep and 50cm wide) is provided at every specified interval, i.e., N1 meters (for example, N1=3), on the slope surface to provide sufficient channels for drainage.

[0050] In some embodiments of this utility model, such as Figure 2 As shown, a drainage sand cushion layer 2 is laid at the bottom of the drainage blind ditch 1. After the drainage blind ditch 1 is excavated, coarse sand with a first specified fineness modulus (e.g., 3.7–3.1) and a first specified average particle size (e.g., 0.5 mm or more) and medium sand with a second specified fineness modulus (e.g., 3.0–2.3) and a second specified average particle size (e.g., 0.5–0.35 mm) are mixed in a first specified ratio (e.g., 7:3) and laid at the bottom of the drainage blind ditch 1. After compaction, the mixture is 10 cm thick, forming the drainage sand cushion layer 2. The drainage sand cushion layer 2 serves as both the foundation cushion layer of the drainage blind ditch and a drainage channel along the slope, as well as an isolation layer to prevent water infiltration into the blind ditch, providing a foundation for efficient slope drainage.

[0051] In some embodiments of this utility model, such as Figure 2 As shown, a graded crushed stone layer 3 is laid on top of the blind drain sand cushion layer 2. That is, after the blind drain sand cushion layer 2 is laid, graded crushed stone of a specified particle size (exemplary, such as 1-30mm) is laid on top of the blind drain sand cushion layer, compacted to a thickness of 45cm, forming the graded crushed stone layer 3. The graded crushed stone layer 3 serves as the main drainage channel for the diversion blind drain 1. Pore water in the 50cm thick sandy loam layer on the slope surface continuously converges to the graded crushed stone layer under the influence of the water head difference, and is discharged into the diversion blind drain along the slope direction, accelerating the drainage consolidation rate of the water-rich sandy loam on the slope surface. Simultaneously, the organized artificial drainage channels ensure the regular consolidation of the soil, avoiding uneven settlement and providing a foundation for the paving of the interlocking slope protection blocks 10.

[0052] In some embodiments of this utility model, such as Figure 2 As shown, the remaining space in the drainage blind drain 1 is backfilled with compacted cover soil 4. That is, after the graded crushed stone layer 3 of the blind drain is laid, the remaining space in the drainage blind drain 1 is backfilled with compacted cover soil 4. Clay with a first specified moisture content (exemplary, such as 19% to 23%) is used for backfilling and compaction to ensure that a specified degree of compaction (exemplary, such as 90%) is achieved. The compacted cover soil 4 is used to close and level the drainage blind drain 1.

[0053] In some embodiments of the present invention, the compacted backfill soil 4.1 for arching is laid at a specified slope and reduced in height on both sides along the longitudinal centerline of the drainage ditch 1, i.e., after backfilling is completed, as shown in... Figure 1 As shown, clay with a second specified moisture content (exemplary, such as 19%–23%) is used and compacted along the longitudinal centerline of the drainage ditch 1 to both sides at a specified slope (exemplary, 6% slope) to complete the compacted cover. When the drainage ditch 1 is spaced 3m apart, the width of each compacted cover 4.1 is 1.5m. The compacted cover 4.1 serves to seal and level the slope surface, reducing soil erosion caused by subsequent rainwater infiltration into the slope. At the same time, the compacted cover 4.1 arches around the longitudinal centerline of the drainage ditch 1, which can offset some of the unevenness of the slope surface caused by the large amount of consolidation settlement of the soil around the drainage ditch 1 due to rainwater infiltration, providing a foundation for the uniform paving of the subsequent interlocking slope protection blocks 10.

[0054] In some embodiments of this utility model, such as Figure 3As shown, the slope protection grid consists of longitudinal grid bars 5, transverse grid bars 6, capping beams 7, and anti-slide anchors 8. The slope protection grid divides the slope surface into units of specified dimensions (e.g., 6m x 6m) through the longitudinal and transverse grid bars 5 and 6. Under its own weight, the slope protection grid provides slope protection while dividing the slope into units, reducing mutual interference during soil drainage and consolidation within each unit, and maximizing slope flatness. The anti-slide anchors 8 at the grid intersections further anchor the grid firmly to the slope surface, enhancing the overall reinforcement and stability of the slope protection system.

[0055] Therefore, after the blind drain (1) has been laid with the blind drain sand cushion layer 2, the blind drain graded crushed stone layer 3, and the compacted cover soil 4.1, and after the blind drain has drained and the sandy loam soil on the slope surface has been consolidated and stabilized, as Figure 3 As shown, trenches are excavated for the construction of longitudinal grid bars 5 and transverse grid bars 6 of the protective grid.

[0056] In some embodiments of this utility model, the first stabilizing mechanism includes a first side template 5.1, a first limiting plate 5.2, a first angled brace 5.3, and a first angled brace anchor 5.4. The first stabilizing mechanism is installed as follows:

[0057] Using the central axis of any two diversion blind drains (1) as a reference, excavate longitudinal trenches with a depth of N3 cm (exemplary, N3 = 60 cm) and a width of N4 cm (30 cm) at intervals of N2 (exemplary, N2 = 6 m) meters.

[0058] Based on longitudinal trenches, such as Figure 4 As shown, a steel plate with a height of N5 meters (exemplary, N5=1) is used as the first side formwork 5.1. It is inserted into the soil N6 centimeters (exemplary, N6=20) along both sides of the excavated longitudinal trench. A steel plate extending upwards N7 centimeters (exemplary, N7=80) is placed flush against the longitudinal trench as the side formwork for the longitudinal grid concrete 5.5. Each section of the first side formwork 5.1 is N8 meters long (exemplary, N8=10), with overlapping positions staggered in the same direction. The overlap length is N9 centimeters (exemplary, N9=50) to ensure no leakage of grout during the pouring of the longitudinal grid concrete 5.5.

[0059] Multiple first limiting plates 5.2 (formed by segmented concrete casting) are installed at intervals between each first side formwork 5.1. Steel plates with a height of N10 meters (exemplary, N10 = 1) and a width of N11 centimeters (exemplary, N11 = 30) are vertically inserted into the first side formwork 5.1 at intervals of N12 meters (exemplary, N12 = 3) along the slope at N13 centimeters (exemplary, N13 = 20). The first side formwork 5.1 is divided into segments every N14 meters (exemplary, N14 = 3) in the longitudinal direction. This prevents the concrete from flowing rapidly down the slope and causing segregation when the concrete 5.5 of the longitudinal grid is poured. Figure 5 As shown, the first inclined bracket 5.3 of the first side template is fixed to the slope surface by a first inclined bracket anchor 5.4 of the first side template. The first inclined bracket anchor 5.4 is anchored to the soil with an anchor rod of length N15 cm (exemplary, N15 = 20), and a hook is set at the end exposed above the ground.

[0060] The first diagonal brace 5.3 is a steel pipe with hooks at both ends. One end is connected to the hook at the exposed end of the first diagonal brace anchor 5.4, and the other end is connected to the top of the first side formwork 5.1. The first side formwork diagonal brace 5.3 can prevent the steel plate of the first side formwork 5.1 from rotating inward or outward due to loosening when inserted into the soil, further reinforcing the first side formwork 5.1. The first diagonal brace 5.3 and the first diagonal brace anchor 5.4 are installed at specified intervals (exemplarily, 2m) along the direction of the first side formwork 5.1.

[0061] In some embodiments of this utility model, the second stabilizing mechanism includes a second side template, a first limiting plate, a first angled brace, and a first angled brace anchor 6.4. The second stabilizing mechanism is installed as follows:

[0062] After the template, limiting plate and diagonal brace of the longitudinal grid 5 of the protective grid are installed, in the area divided by the first side template (5.1), based on the multiple preliminary longitudinal grids, in the area divided by the first side template (5.1), dig transverse trenches with a depth of N3 cm (exemplary, N3 = 60 cm) and a width of N4 cm (exemplary, N4 = 30 cm) at intervals of N5 meters (exemplary, N5 = 6 m) in the transverse direction.

[0063] Based on transverse trenches, such as Figure 4As shown, a steel plate with a height of N5 meters is used as the second side formwork. It is inserted into the soil N6 centimeters along both sides of the excavated transverse trench, and an additional steel plate N7 centimeters upwards is placed flush against the transverse trench as the side formwork for the transverse grid concrete. With the longitudinal grid bars 5 of the protective grid spaced 6 meters apart, the slope has been divided into 6-meter-wide strip units. Therefore, the length of each longitudinal grid bar 5 is 6 meters, and the length of the steel plate for the second side formwork is also 6 meters. Each section of the second side formwork is N8 meters long, with overlapping positions staggered in the same direction, and an overlap length of N9 centimeters to ensure no leakage of grout during the pouring of the transverse grid concrete.

[0064] Multiple second limiting plates (formed by segmented concrete pouring) are installed at intervals between each second side formwork. Steel plates, 10 meters high and 11 centimeters wide, are vertically inserted into the second side formwork at intervals of N12 meters along the slope, N13 centimeters away. This divides the second side formwork into segments at intervals of N14 meters laterally, preventing concrete segregation caused by rapid downward flow along the slope when pouring the concrete for the transverse grid. Figure 5 As shown, the second diagonal brace of the second side formwork is fixed to the slope surface by a second diagonal brace anchor 6.4 of the second side formwork. The second diagonal brace anchor 6.4 of the second side formwork is anchored to the soil with an anchor rod of length N15 cm, and a hook is set at the end exposed above the ground.

[0065] The second diagonal brace is a steel pipe with hooks at both ends. One end is connected to the hook at the exposed end of the second diagonal brace anchor 6.4, and the other end is connected to the top of the second side formwork. The diagonal brace of the second side formwork can prevent the steel plate of the second side formwork from rotating inward or outward due to loosening when inserted into the soil, thus further reinforcing the second side formwork. The second diagonal brace and the second diagonal brace anchor 6.4 are installed at specified intervals along the direction of the second side formwork.

[0066] At the intersection of the second side formwork and the first side formwork 5.1, the first side formwork 5.1 is chamfered and broken to connect the first side formwork 5.1 with the second side formwork, ensuring that the longitudinal grid concrete 5.5 and the transverse grid concrete 6.4 are poured into a whole.

[0067] In some embodiments of this utility model, the center of the square area formed by the intersection of the longitudinal grid 5 and the transverse grid 6 is perpendicular to the slope surface, and an anti-slip anchor 8 is provided. The length of the anti-slip anchor 8 is sufficient to pass through the sliding surface of the slope, that is, after the two stabilizing mechanisms are installed, as shown... Figure 1As shown, anti-slide anchor rods 8 are inserted perpendicularly to the slope surface at the center of the square area formed by the intersection of the longitudinal grid 5 and the transverse grid 6. The length of the anti-slide anchor rods 8 is sufficient to pass through the slip surface of the slope. After the templates of the longitudinal and transverse grids of the protective grid are installed, the anti-slide anchor rods 8 not only reinforce the slope against slippage but also anchor the strip concrete protective grid to the slope surface, further enhancing the overall reinforcement effect and stability of the slope protection system.

[0068] In some embodiments of this utility model, a capping beam 7 is arranged at the end of the longitudinal grid 5. The capping beam 7 and the longitudinal grid 5 are integrally cast with concrete. Specifically, the capping beam 7 is arranged at the top of the slope, along a direction perpendicular to the longitudinal grid 5, close to the end of the longitudinal grid 5. The depth of the capping beam 7 is 80cm and the width is 60cm, respectively. The capping beam 7 and the longitudinal grid 5 are integrally cast with concrete, which serves to cap the slope and fix the longitudinal grid 5 of the protective grid at the top of the slope, ensuring the stability and durability of the slope protection system.

[0069] In some embodiments of this utility model, the inner walls of the first side formwork 5.1 and the second side formwork 6.1 are coated with a concrete release agent; the longitudinal grid concrete 5.5 is poured between the first side formwork 5.1; the transverse grid concrete 6.4 is poured between the second side formwork 6.1; and concrete is poured for the capping beam 7. Specifically, this includes:

[0070] Apply concrete release agent to the inner walls of the first side formwork 5.1 and the second side formwork, then as follows: Figure 6 As shown, concrete for the longitudinal grid 5.5, the transverse grid 6.4, and the capping beam 7 are poured simultaneously. C30 concrete is used for pouring. After curing, the demolition work is carried out. The side formwork, limiting plate, diagonal bracing, etc. of the longitudinal grid 5 and the transverse grid 6 of the protective grid are removed. After demolition, the gap between the concrete and the slope soil is backfilled and compacted.

[0071] In some embodiments of this utility model, the protection system further includes a geotextile filter layer. The interlocking slope protection blocks 10 are laid on the geotextile filter layer of the unit. In the unit, the interlocking slope protection blocks 10 are laid in the order from top to bottom and from both sides to the middle. The interlocking slope protection blocks 10 are precast concrete ballast blocks that interlock with each other by wedge embedding. The specific method of laying the geotextile filter layer and the interlocking slope protection blocks 10 includes:

[0072] After the slope protection grid and anti-sliding anchor 8 are constructed, a geotextile filter layer is laid close to the slope surface that has been drained and consolidated by the drainage ditch 1 and the longitudinal grid 5 and transverse grid 6 of the protection grid.

[0073] The geotextile filter layer uses 300g / m 2 The impermeable geotextile is fully laid on the slope surface, closely adhering to the longitudinal and transverse grids of the slope protection mesh, to reduce rainwater infiltration into the slope later. After the geotextile filter layer is laid, as... Figure 7 shown ( Figure 7 In order to facilitate the representation of the longitudinal grid 5 and the transverse grid 6 of the protective grid, the drainage blind ditch 1 is not drawn, and the interlocking slope protection block 10 is only simplified and drawn in one unit (the interlocking slope protection block 10 is interlocked with each other). The interlocking slope protection block 10 is laid in each unit formed by the longitudinal grid 5 and the transverse grid 6 of the protective grid. The laying sequence of the interlocking slope protection block 10 is from top to bottom and from both sides to the middle. The interlocking slope protection block 10 is a precast concrete ballast block that interlocks with each other by wedge.

[0074] The interlocking slope protection blocks 10 serve as slope protection under their own weight. At the same time, the ballast of the interlocking slope protection blocks 10 further drains and consolidates the slope soil. The paving sequence from top to bottom and from both sides to the middle is conducive to the uniform drainage and consolidation of the soil and reduces uneven settlement of the slope.

[0075] The wedge grooves of the interlocking slope protection blocks 10 can be reasonably sized to ensure that the interlocking slope protection blocks 10 are firmly interlocked and that the compressive strength of each individual interlocking slope protection block 10 is guaranteed, thus avoiding stress concentration.

[0076] In some embodiments of this utility model, the protection system further includes a drainage pipe 11 and a slope protection toe 12. The drainage pipe 11 is located at the bottom of the slope and is sleeved on the drainage blind ditch 1. The drainage pipe 11 is filled with graded crushed stone and coarse sand, and a dense wire mesh is installed at the end of the drainage pipe 11. The slope protection toe 12 is located at the bottom of the slope, with a designated portion buried underground and the remaining portion above ground, nested within the drainage pipe 11. The specific installation methods of the drainage pipe 11 and the slope protection toe 12 include:

[0077] At the bottom of the slope, a drainage pipe 11 is used to collect and systematically discharge the pore water discharged from the consolidation of the soil at the end of the drainage ditch. The drainage pipe 11 is made of PVC material. For example, when the cross-section of the drainage ditch 1 is a rectangle of 50cm*60cm, the cross-sectional area of ​​the end of the drainage pipe 11 that connects to the drainage ditch 1 is 52cm*62cm, so that it can be sleeved on the drainage ditch 1 to collect the pore water discharged from the drainage ditch 1. The terminal cross-section of the drainage pipe 11 is, for example, a rectangle of 5cm*5cm for constricted drainage. Therefore, for example, the side cross-section of the drainage pipe 11 is a right trapezoid with an upper base of 5cm and a lower base of 62cm.

[0078] The drain pipe 11 is filled with graded crushed stone of a specified particle size (e.g., 1-10 mm) and coarse sand of a specified fineness modulus (3.7-3.1) and a specified average particle size (e.g., 0.5 mm) in a second specified ratio (e.g., 2:1) to prevent the sand and gravel in the drainage blind ditch 1 from being carried out by the water flow; a dense wire mesh is installed at the end of the drain pipe 11 to prevent the sand and gravel in the drain pipe 11 from being carried out by the water flow.

[0079] like Figure 8 As shown, the total length of the drainage pipe 11 is 1m, of which the length connected to the outer sleeve of the drainage blind ditch 1 is 20cm, and after the connection is completed, the soil is covered with a specified thickness (exemplary, 10cm) and compacted. The length embedded in the slope protection toe 12 is 80cm, and the end of the drainage pipe 11 is flush with the edge of the slope protection toe 12.

[0080] The slope protection toe 12 is located at the bottom of the slope, exemplarily 1.5m high, with a designated portion (exemplarily 80cm) buried underground and the remaining portion (exemplarily 70cm) above ground, nested within the drainage pipe 11. The top elevation is consistent with the compacted soil elevation of the drainage pipe 11. The slope protection toe 12 is exemplarily 80cm wide, cast in place with C30 strength concrete, serving as the slope protection toe. Embedded underground, the slope protection toe 12 can prevent the slope from sliding under its own weight, while also making the slope protection system more aesthetically pleasing and harmonious.

[0081] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model's technical solution. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the content of the present utility model's technical solution shall still fall within the scope of the present utility model's technical solution.

Claims

1. A composite slope protection system based on blind ditch guide drainage, characterized in that, It comprises a diversion blind ditch (1), a longitudinal grid (5), a transverse grid (6) and a chain type slope protection block, wherein, The slope surface is provided with a diversion blind ditch (1) every specified distance, and the two sides of the diversion blind ditch (1) are paved with an arched compacted soil cover (4.1); The longitudinal grid (5) and the transverse grid (6) are arranged on the slope surface, and two diversion blind ditches form a pair, and a longitudinal grid (5) is arranged on the central axis of each pair of diversion blind ditches (1); The longitudinal grid (5) comprises a longitudinal groove, and the transverse grid (6) comprises a transverse groove, the longitudinal groove is filled with longitudinal grid concrete (5.5) through a first stabilizing mechanism, and the transverse groove is filled with transverse grid concrete (6.4) through a second stabilizing mechanism; The chain type slope protection block is arranged in the unit formed by the intersection of the longitudinal grid (5) and the transverse grid (6), and the chain type slope protection blocks are engaged with each other.

2. The composite slope protection system based on blind drain guide drain according to claim 1, characterized in that, The bottom of the diversion blind ditch (1) is paved with a blind ditch sand cushion layer (2), the blind ditch sand cushion layer (2) is paved with a blind ditch graded gravel layer (3), and the remaining space in the diversion blind ditch (1) is backfilled with a blind ditch compacted soil cover (4).

3. The composite slope protection system based on blind drain guttering according to any one of claims 1-2, characterized in that, The arched compacted soil cover (4.1) is arranged on both sides of the longitudinal central axis of the diversion blind ditch (1) at a specified slope and height reduction.

4. The composite slope protection system based on blind drainage ditch guide drain according to claim 1, characterized in that, The center of the square area formed by the intersection of the longitudinal grid (5) and the transverse grid (6) is perpendicular to the slope surface, and an anti-skid anchor rod (8) is arranged at the center, and the length of the anti-skid anchor rod (8) satisfies the requirement of passing through the sliding surface of the slope.

5. The composite slope protection system based on blind drain guttering according to claim 4, characterized in that, The first stabilizing mechanism comprises a first side formwork (5.1), a first limiting plate (5.2), a first inclined angle support (5.3) and a first inclined angle support anchor (5.4), wherein, The first side formwork (5.1) is inserted into the longitudinal groove along the two side walls of the excavated longitudinal groove, and the first side formwork (5.1) is placed in a same direction and is misaligned at a lap joint position; A plurality of first limiting plates (5.2) are arranged between each first side formwork (5.1) at intervals; The first inclined angle support (5.3) is fixed to the slope surface through the first inclined angle support anchor (5.4), the first inclined angle support anchor (5.4) is anchored to the soil body by an anchor rod, and a hook is arranged at the exposed end of the anchor rod; wherein, the first inclined angle support (5.3) and the first inclined angle support anchor (5.4) are arranged at intervals of a specified distance in the direction of the first side formwork (5.1).

6. The composite slope protection system based on blind drain guttering according to claim 5, characterized in that, The second stabilizing mechanism comprises a second side formwork, a second limiting plate, a second inclined angle support and a second inclined angle support anchor: The second side formwork is inserted into the transverse groove along the two side walls of the excavated transverse groove, and the second side formwork is placed in a same direction and is misaligned at a lap joint position; A plurality of second limiting plates are arranged between each second side formwork at intervals; The second inclined angle support is fixed to the slope surface through the second inclined angle support anchor, the second inclined angle support anchor is anchored to the soil body by an anchor rod, and a hook is arranged at the exposed end of the anchor rod; wherein, the second inclined angle support and the second inclined angle support anchor are arranged at intervals of a specified distance in the direction of the second side formwork.

7. The composite slope protection system based on blind drain guttering according to claim 6, characterized in that, The first side formwork (5.1) and the second side formwork (6.1) are connected in space; The inner wall of the first side template (5.1) and the second side template (6.1) is coated with a concrete release agent, the longitudinal grid concrete (5.5) is cast between the first side template (5.1), and the transverse grid concrete (6.4) is cast between the second side template (6.1).

8. The composite slope protection system based on blind drainage ditch guide drain according to claim 1, characterized in that, The end of the longitudinal grid (5) is provided with a coping beam (7), and the coping beam (7) and the longitudinal grid (5) are integrally cast by concrete.

9. The composite slope protection system based on blind drainage ditch guide drain according to claim 1, characterized in that, Further comprising a geotextile filter layer, The geotextile filter layer is laid close to the slope surface consolidated by the drainage blind ditch (1) and the surface of the longitudinal grid (5) and the transverse grid (6) of the protection grid; The chain type slope protection block (10) is laid on the geotextile filter layer of the unit, and in the unit, the laying sequence of the chain type slope protection block (10) is from top to bottom and from both sides to the middle, wherein the chain type slope protection block (10) is a prefabricated concrete ballast block, which is engaged with each other by wedge embedding.

10. The composite slope protection system based on blind drainage ditch guide drain according to claim 1, characterized in that, Further comprising a drainage pipe (11) and a slope footing, The drainage pipe (11) is arranged at the slope bottom and is sleeved on the drainage blind ditch (1), the drainage pipe (11) is filled with graded gravel and coarse sand inside, and a close-mesh steel mesh is installed at the terminal of the drainage pipe (11); The slope footing (12) is arranged at the slope bottom, a specified part is embedded in the ground, and the remaining part is located on the ground, and is nested with the drainage pipe (11).

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