Stable control structure and method for high-fill ski track on large slope

Abstract

The present invention relates to a stability control structure and method for a large slope high-fill ski track. The stability control structure includes anti-slide piles, pressure plates, first connecting plates, second connecting plates, and geogrids. The anti-slide piles are arranged below the ski track, adjacent anti-slide piles are connected by the first connecting plates, and part of them are embedded in the stable stratum. The main reinforcement of their above-ground parts is connected to the geogrids through the pressure plates and the second connecting plates, and the geogrids are laid on the surface of the filling blocks. It also includes a drainage structure. The drain pipes are arranged longitudinally along the ski track, the pipe walls are provided with drainage holes, the outer sides are wrapped with permeable geotextiles and backfilled with gravel. The present invention is mainly used to improve the stability of the large slope high-fill ski track, prevent landslides, and at the same time solve the drainage problem to ensure the safe use and long-term stable operation of the ski track.

Description

Technical Field

[0001] The present invention relates to the field of stability control of large slope high fill ski tracks. More specifically, the present invention relates to a stability control structure and method for large slope high fill ski tracks. Background Art

[0002] In the engineering practice of large slope high fill ski tracks, the stability control of high fill slopes always poses technical challenges. Since the ski track needs to be constructed on steep terrain or large thickness fills, its self-weight load and repeated freeze-thaw actions are likely to cause potential slip surfaces in the fills, resulting in sliding failures along the weak structural planes. Although the traditional anti-slide pile support system can provide certain lateral resistance, there are the following prominent problems: First, the cooperative working performance of anti-slide piles is insufficient. In conventional designs, each anti-slide pile is mostly in an independent stress state, lacking effective transverse connection members, and it is difficult to form an integral structure to resist the sliding force. When the fill undergoes uneven deformation, the independent anti-slide piles are prone to failure due to local overload, and the soil arch effect between adjacent piles is difficult to fully play, resulting in insufficient overall support stiffness. Second, there are defects in groundwater seepage control. A stagnant water layer is easily formed in the high fill body. The traditional drainage system mostly uses direct drainage ditches, lacking anti-filter protection, resulting in the loss of fine particles and clogging of the drainage channels. At the same time, the softening effect of groundwater seepage on potential slip surfaces is not considered. The increase in pore water pressure during the rainy season or snowmelt period will significantly reduce the shear strength of the fill body, exacerbating the landslide risk. The combined action of these factors makes the stability control of large slope high fill ski tracks a complex technical problem. Summary of the Invention

[0003] In the construction of large slope high fill ski tracks, the traditional support structure is difficult to effectively cope with the landslide risk brought by high fills. Under the action of high fills, the filling blocks on both sides of the ski track are prone to lose stability due to soil sliding, resulting in track deformation or damage. In addition, the connection strength between the filling blocks and the support structure is insufficient, making it difficult to effectively transfer stress, further exacerbating the stability problem. At the same time, the drainage system design under the ski track is unreasonable, resulting in water accumulation and increasing the risk of slope sliding.

[0004] Preferably, the present invention provides a stable control structure for a large slope high-fill ski track. The two sides of the ski track are respectively arranged as filling blocks. The stable control structure includes anti-slide piles, pressure plates, first connecting plates, second connecting plates, and geogrids. Among them, a plurality of the anti-slide piles are arranged under the ski track, and the adjacent anti-slide piles along the width direction of the ski track are connected by the first connecting plates. Part of the anti-slide piles are embedded in the stable stratum of the ski track. Pressure plates, second connecting plates, and geogrids are respectively arranged on both sides of the top of the anti-slide piles. The main bars of the above-ground part of the anti-slide piles are connected to the geogrids through the pressure plates and the second connecting plates. The geogrids are laid on the surface of the filling blocks; the length of the anti-slide piles embedded in the stable stratum is not less than 1 / 3 of the pile length and penetrates 2 meters below the potential slip surface; the surface of the geogrids is provided with embossments or convex nodes to enhance the interlocking bite with the soil body; the stable control structure further includes a drainage structure arranged under the ski track and under the filling blocks. The drainage structure includes drain pipes arranged longitudinally along the ski track. The outlet of the drain pipes is connected to a drainage ditch under the ski track. A plurality of drainage holes are arranged on the pipe wall of the drain pipes. The outside of the drain pipes is wrapped with permeable geotextiles. The outside of the permeable geotextiles is backfilled with gravel with a particle size of 10-20 mm, and the backfilling thickness of the gravel is 300 mm.

[0005] By setting anti-slide piles, pressure plates, connecting plates, and geogrids, the present invention forms a comprehensive stable control structure, which can effectively enhance the stability of the filling blocks on both sides of the ski track. Part of the anti-slide piles are embedded in the stable stratum and penetrate the potential slip surface, significantly improving the anti-sliding ability of the slope. The design of the embossments or convex nodes on the surface of the geogrids enhances the interlocking bite with the soil body and further improves the stability of the filling blocks. At the same time, the design of the drainage structure effectively solves the drainage problem under the ski track, prevents water accumulation, reduces the risk of slope sliding, and overall improves the stability and safety of the ski track.

[0006] There is a problem of insufficient uplift resistance in the application of traditional anti-slide piles in high-fill ski tracks. Due to the high-fill effect of the filling blocks on both sides of the ski track, when the anti-slide piles bear a large vertical load, the uplift resistance is likely to be insufficient, resulting in relative sliding between the anti-slide piles and the surrounding soil, affecting the overall stability.

[0007] Preferably, the anti-slide piles of the present invention are arranged with variable cross-sections. The cross-sectional area of the pile body in the part embedded in the stable stratum is larger than that of the above-ground part. A tapered transition section is arranged at the variable cross-section. Annular grooves are arranged on the surface of the transition section to form an interlocking structure with the surrounding soil body, enhancing the uplift resistance.

[0008] By adopting a variable cross-section design, the cross-sectional area of the anti-slip pile embedded in the stable stratum is increased, which significantly improves the pull-out resistance of the anti-slip pile. The design of the conical transition section and the annular groove further enhances the bite effect between the anti-slip pile and the surrounding soil, effectively preventing the relative sliding of the anti-slip pile under the action of high fill, and improving the stability of the overall structure. This design has significant practicality and advantages in high-fill ski tracks, and can effectively cope with complex geological conditions and the challenges brought by high fill.

[0009] In the high-fill ski track with large slopes, the traditional connection plate design has the problem of insufficient connection strength. Due to the high fill effect of the fill blocks on both sides of the ski track, the connection between adjacent anti-slip piles needs to withstand greater stress. The traditional connection plate design is difficult to meet this requirement, which easily leads to damage to the connection parts and affects the overall stability.

[0010] Preferably, the second connecting plate of the present invention is a double-layer corrugated steel plate structure, the direction of the corrugation thereof forms an angle of 45° with the extension direction of the ski track, and the surface of the pressure plate is provided with engaging teeth matching the corrugation of the second connecting plate, forming a bidirectional locking mechanism.

[0011] The second connecting plate with double-layer corrugated steel plate structure significantly improves the connection strength. The design of the corrugation direction at a 45° angle to the extension direction of the ski track can effectively disperse the stress and enhance the shear resistance of the connecting plate. The bite teeth on the surface of the pressure plate and the second connecting plate form a two-way locking mechanism, which further improves the reliability of the connection and ensures the overall stability between the anti-slip piles. This design has significant practicality and advantages in high-fill ski tracks, and can effectively cope with complex geological conditions and challenges brought by high fill.

[0012] In the high-fill ski track with large slopes, the connection strength between the traditional geogrid and the soil is insufficient, making it difficult to effectively transfer stress. The high fill effect of the fill blocks on both sides of the ski track causes relative sliding between the soil and the supporting structure, affecting the overall stability. In addition, the surface design of the traditional geogrid cannot meet the strict stability requirements of the high-fill ski track.

[0013] Preferably, the surface of the geogrid of the present invention is wrapped with a steel-plastic composite layer, which adopts a three-dimensional node reinforcement process, and spherical convex nodes are set at the intersection of the transverse ribs and the longitudinal main reinforcement. The height of the convex nodes is 1.5 times the thickness of the grid, and the spacing is not more than 50mm.

[0014] By wrapping a steel-plastic composite layer on the surface of the geogrid and adopting a three-dimensional node reinforcement process, the connection strength between the geogrid and the soil mass is significantly improved. The design of spherical convex nodes further enhances the interlocking and biting effect, effectively transmits the stress between the soil mass and the support structure, and prevents relative sliding. This design has significant practicality and advantages in high fill ski slopes, can effectively cope with complex geological conditions and the challenges brought by high fills, and significantly improves the stability of the ski slope.

[0015] In the high fill ski slope of large slope, the traditional drain pipe design has problems of low drainage efficiency and easy blockage. The drainage system under the ski slope needs to operate efficiently under complex geological conditions. The water flow guidance and anti-blockage design of traditional drain pipes cannot meet this requirement, resulting in poor drainage and increasing the risk of slope sliding.

[0016] Preferably, the drain pipe of the present invention includes a pipe body, which is a long straight pipe; a water flow guiding plate, which is installed upstream on the inner wall of the pipe body, and the water flow guiding plate is arc-shaped; a rotating shaft, which is installed on the inner wall of the pipe body through a bearing and is located behind the water flow guiding plate, and the rotating shaft can rotate around the axis of the pipe body; there are multiple rotating shafts, which are distributed along the axis of the pipe body, and the distance between adjacent two rotating shafts is 2-3 times the diameter of the pipe body; a torsion spring, which is installed radially along the pipe body, the central hole of the torsion spring is aligned with the rotating shaft, one end of the torsion spring is fixed on the inner wall of the pipe body, and the other end is fixed on the rotating shaft; a rotating blade, which is installed on the rotating shaft; a scraping plate, which is installed on the rotating shaft along the axis direction of the pipe body, and as the rotating shaft rotates, the scraping plate also rotates accordingly, and one side of the scraping plate is closely attached to the inner wall of the pipe body, and the length of the scraping plate is controlled between 1 / 2-2 / 3 of the diameter of the pipe body.

[0017] By designing the water flow guiding plate, rotating shaft, torsion spring, rotating blade and scraping plate, the drain pipe can achieve efficient water flow guidance and automatic cleaning functions. The arc-shaped design of the water flow guiding plate can guide the water flow to pass smoothly, and the combination of the rotating blade and the scraping plate can effectively prevent the drain pipe from being blocked, ensuring the long-term stable operation of the drainage system. This design has significant practicality and advantages in high fill ski slopes, can effectively cope with complex geological conditions and the challenges brought by high fills, and significantly improves the stability of the ski slope.

[0018] In the high fill ski slope of large slope, the traditional drain pipe design lacks effective end protection measures, resulting in problems of water flow impact and sediment deposition. The water flow impact at the end of the drain pipe may cause damage to the drain pipe, and the sediment deposition will reduce the drainage efficiency and affect the performance of the overall drainage system.

[0019] Preferably, the water baffle of the present invention is installed downstream of the inner wall of the pipe body and is located 1.5 m - 1.7 m behind the last rotation axis.

[0020] By installing a water baffle at the end of the drain pipe, the impact of water flow can be effectively reduced, and the damage to the end of the drain pipe can be prevented. At the same time, the water baffle can block sediment from entering the end of the drain pipe, reduce sediment deposition, and ensure the long-term stable operation of the drainage system.

[0021] In a large slope high-fill ski track, the traditional drain pipe design has the problem of insufficient water flow power. Since the drainage system under the ski track needs to operate efficiently under complex geological conditions, the water flow power design of the traditional drain pipe cannot meet this requirement, resulting in poor drainage and increasing the risk of slope sliding.

[0022] Preferably, the rotating blade of the present invention is in a curved shape, and its installation angle is between 30° and 60°.

[0023] By designing a curved rotating blade and controlling the installation angle between 30° and 60°, the water flow can be significantly improved. In a large slope high-fill ski track, the traditional drain pipe design lacks an effective water flow guiding device, resulting in uneven water flow distribution and affecting the drainage efficiency. The drainage system under the ski track needs to operate efficiently under complex geological conditions, and the water flow guiding design of the traditional drain pipe cannot meet this requirement, resulting in poor drainage and increasing the risk of slope sliding.

[0024] Preferably, there are three guide plates in the present invention, including two sub-guide plates and one main guide plate. The two sub-guide plates are located on the same radial section of the pipe, about 1 / 4 of the pipe diameter away from the inlet, symmetrically arranged on both sides of the pipe. The main guide plate is located below the two sub-guide plates, and the end of the main guide plate faces the rotating blade; all three guide plates are triangular guide plates, and the size of the main guide plate is larger than that of the sub-guide plates.

[0025] By designing three guide plates, including two sub-guide plates and one main guide plate, the water flow can be effectively guided to ensure uniform water flow distribution. The reasonable layout of the sub-guide plates and the main guide plate can improve the water flow power and enhance the drainage efficiency. This design has significant practicality and advantages in high-fill ski tracks, can effectively cope with the challenges brought by complex geological conditions and high fills, and significantly improves the stability of the ski track.

[0026] The present invention also provides a construction method for the stability control structure of the large slope high-fill ski track, including the following steps:

[0027] S1. Site cleaning and measurement positioning

[0028] Clean the construction site and remove surface debris. Use surveying instruments to measure the center line of the ski track, slope gradient, etc., and determine the accurate positions of structures such as anti-slide piles and drainage pipes;

[0029] S2. Construction of anti-slide piles

[0030] Set out the pile positions. Along the width direction of the ski track, set out the positions of anti-slide piles at the designed intervals. Excavate the pile holes by machine or manually to ensure that the hole diameter and depth meet the design requirements. Pour the pile body. Bind the steel reinforcement cage in the pile hole and pour concrete to form the pile body of the anti-slide pile embedded in the stable stratum, and the cross-sectional area of the part embedded in the stable stratum is larger than that of the above-ground part;

[0031] S3. Installation of connecting plates

[0032] Install the first connecting plate. Install the first connecting plate between adjacent anti-slide piles to ensure firm connection. Install the second connecting plate. Install the second connecting plate on both sides of the top of the anti-slide pile;

[0033] S4. Laying of pressing plates and geogrids

[0034] Install the pressing plate on the top of the anti-slide pile. The surface of the pressing plate is provided with engaging teeth to form a two-way locking mechanism with the second connecting plate. Lay the geogrid. Lay the geogrid on the surface of the filling block;

[0035] S5. Construction of drainage structures

[0036] Install the drainage pipes. Arrange the drainage pipes longitudinally along the ski track. Protect the drainage pipes. Wrap the drainage pipes with permeable geotextiles on the outside, and backfill with gravel with a particle size of 10 - 20 mm on the outside, and the backfill thickness is 300 mm;

[0037] S6. Construction of filling blocks

[0038] Carry out the construction of filling blocks on both sides of the ski track to ensure the filling quality and the compaction degree meets the design requirements;

[0039] S7. Quality inspection and acceptance

[0040] Conduct a comprehensive inspection on the completed stability control structure to ensure that the construction quality meets the design requirements.

[0041] The present invention has at least the following beneficial effects: Through the reasonable design of anti-slide piles, part of them are embedded in the stable stratum and penetrate 2 meters below the potential slip surface. The variable cross-section design enhances the uplift resistance and anti-slide ability. The double-layer corrugated steel plate structure of the second connecting plate and the bite teeth design of the pressing plate further improve the reliability of the connection. The steel-plastic composite layer and spherical convex nodes on the surface of the geogrid enhance the interlocking and biting effect with the soil, effectively transfer stress, and prevent relative sliding. The optimized design of the drainage structure, including drain pipes arranged longitudinally along the ski track, drainage holes on the pipe wall, permeable geotextiles, and gravel backfill layers, effectively solves the problem of water accumulation and reduces the sliding risk. Components such as water flow guiding plates, rotating blades, and scrapers inside the drain pipes achieve efficient water flow guiding and automatic cleaning functions, ensuring the long-term stable operation of the drainage system. The optimization of the construction method, from site cleaning to quality inspection and acceptance, is carried out strictly in accordance with the design requirements to ensure that the construction quality meets the standards. Overall, the present invention not only significantly improves the stability of the ski track, but also enhances the construction quality and operation safety, providing a strong guarantee for the long-term stable operation of the ski track. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic layout structure diagram of the stable control structure of the high-fill ski track with a large slope in the present invention.

[0043] Figure 2 It is a schematic structure diagram of the drain pipe in the present invention.

[0044] Figure 3 It is a schematic structure diagram of the torsion spring in the present invention.

[0045] Figure 4 It is a schematic structure diagram of the anti-slide pile in the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0046] The following further elaborates on the present invention with reference to the accompanying drawings, enabling those skilled in the art to implement it based on the description in the specification.

[0047] The following description is used to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious deformations. The basic principles defined in the following description can be applied to other implementation schemes, deformation schemes, improvement schemes, equivalent schemes, and other technical schemes that do not deviate from the spirit and scope of the present invention.

[0048] Those skilled in the art should understand that in the disclosure of the present invention, the orientation or positional relationship indicated by terms such as "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on the present invention.

[0049] It can be understood that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of the element can be multiple. The term "a" should not be construed as a limitation on the quantity.

[0050] As Figures 1-4 shown, a technical solution of the present invention provides a stable control structure for a large slope high-fill ski track. Through components such as anti-slide piles 1, pressing plates 4, and geogrids 6, they work together to enhance the stability of the filling blocks on both sides of the ski track. The anti-slide piles 1 are arranged along the width direction of the ski track 2, and adjacent anti-slide piles 1 are connected by the first connecting plates 3 to form a stable support system. Part of the anti-slide piles 1 penetrate into the stable stratum below the ski track 2, and the embedded length is not less than one-third of the pile length and penetrates two meters below the potential slip surface, thereby providing a solid anti-slide foundation for the slope. The main reinforcement of the above-ground part of the anti-slide piles 1 is connected to the pressing plates 4 through the second connecting plates 5 and finally connected to the geogrid 6 laid on the surface of the filling blocks. The embossed or convex node design on the surface of the geogrid 6 enables a good interlocking and biting effect with the soil, further enhancing the stability of the filling blocks. In addition, the stable control structure also includes a drainage structure. The drain pipes 7 are arranged longitudinally along the ski track 2, the pipe walls are covered with drainage holes, and the outside is wrapped with permeable geotextiles and then backfilled with gravel with a particle size of 10 - 20 mm, and the backfill thickness reaches 300 mm. Such a drainage structure can effectively drain groundwater and surface water and prevent the adverse impact of water accumulation on the slope stability.

[0051] During the construction process, the construction site is first cleaned and the surface debris is removed. Then, the center line of the ski track, the slope of the side slope, etc. are accurately measured using measuring instruments to determine the exact position of structures such as the anti-slip pile 1 and the drainage pipe 7. The construction of the anti-slip pile 1 includes steps such as pile position setting, pile hole excavation, and pile body casting. The pile hole excavation is carried out mechanically or manually. The cross-sectional area of the pile body of the anti-slip pile 1 embedded in the stable stratum is larger than the above-ground part to enhance the pull-out resistance. The installation of the connecting plate includes the installation of the first connecting plate 3 and the second connecting plate 5 to ensure a firm and reliable connection. The pressure plate 4 is installed on the top of the anti-slip pile 1, and the surface is provided with bite teeth to form a two-way locking mechanism with the second connecting plate 5, which enhances the overall stability of the structure. The geogrid 6 is laid on the surface of the filling block, and the embossing or convex nodes on its surface are closely combined with the soil, further improving the stability of the filling block. The construction of the drainage structure includes the installation and protection of the drainage pipe 7. The drainage pipe 7 is arranged longitudinally along the ski track. The drainage holes on the pipe wall ensure the smooth discharge of water. The permeable geotextile and gravel backfill layer effectively prevent mud and sand from clogging the drainage holes, ensuring the long-term stable operation of the drainage system.

[0052] Through the above structure and construction method, the present invention can effectively enhance the stability of the filling blocks on both sides of the ski track. The design of the anti-slip pile 1 significantly improves the anti-slip ability of the slope, the surface design of the geogrid 6 enhances the interlocking effect with the soil, and the drainage structure effectively solves the drainage problem under the ski track, preventing water accumulation and reducing the risk of slope sliding. Overall, the present invention significantly improves the stability and safety of the ski track, providing a strong guarantee for the construction and operation of the ski track.

[0053] In another technical solution, the anti-slip pile 1 of the present invention adopts a unique variable cross-section design to enhance its pull-out resistance and stability. Specifically, the cross-sectional area of the pile body of the anti-slip pile 1 embedded in the stable stratum is larger than that of the above-ground part. This design enables the anti-slip pile 1 to better resist the pull-out force when subjected to a large vertical load, thereby effectively preventing the relative sliding between the anti-slip pile 1 and the surrounding soil. A conical transition section 1-1 is provided at the variable cross-section, and an annular groove 1-2 is also provided on its surface. These annular grooves form a bite structure with the surrounding soil, further enhancing the pull-out resistance of the anti-slip pile 1. During the construction process, the construction of the anti-slip pile 1 includes steps such as pile position setting, pile hole excavation, and pile body casting. The pile hole excavation is carried out mechanically or manually to ensure that the hole diameter and depth strictly meet the design requirements. The cross-sectional area of the pile body of the anti-slip pile 1 embedded in the stable stratum is larger than that of the above-ground part. The design of the conical transition section makes the bite effect between the anti-slip pile 1 and the surrounding soil better, and the annular groove further enhances the pull-out resistance.

[0054] This anti-slide pile 1 with variable cross-section design has significant practicality and advantages in the high-fill ski track. Under the action of high fill, the traditional anti-slide pile 1 is prone to insufficient uplift force. However, the anti-slide pile 1 of the present invention effectively solves this problem through the variable cross-section design, the tapered transition section and the annular groove. In practical applications, the anti-slide pile 1 can better adapt to complex geological conditions, providing a strong guarantee for the stability of the ski track. By enhancing the uplift force of the anti-slide pile 1, the present invention can effectively prevent the filling blocks on both sides of the ski track from sliding under the action of high fill, thus significantly improving the overall stability of the ski track and laying a solid foundation for the safe operation of the ski track.

[0055] In another technical solution, the second connecting plate 5 of the present invention adopts a double-layer corrugated steel plate structure, and the corrugation direction forms a 45° angle with the extension direction of the ski track. This structural design can effectively disperse stress and enhance the anti-shear ability of the connecting plate. The surface of the pressing plate 4 is provided with engaging teeth matching the corrugations of the second connecting plate 5. When the pressing plate 4 and the second connecting plate 5 are installed together, the engaging teeth and the corrugations are mutually engaged to form a two-way locking mechanism. This two-way locking mechanism further improves the reliability of the connection and ensures the overall stability between the anti-slide piles 1. During the construction process, the second connecting plate 5 is installed on both sides of the top of the anti-slide pile 1 to ensure firm and reliable connection. The pressing plate 4 is installed on the top of the anti-slide pile 1, and the engaging teeth on its surface match the corrugations of the second connecting plate 5 to form a two-way locking mechanism. This design can effectively disperse stress, enhance the anti-shear ability of the connecting plate, and further improve the reliability of the connection.

[0056] The second connecting plate 5 with a double-layer corrugated steel plate structure and the engaging tooth design have significant practicality and advantages in the high-fill ski track. Under the action of high fill, the traditional connecting plate design is prone to problems of insufficient connection strength, thus affecting the overall stability. However, the second connecting plate 5 of the present invention effectively solves this problem through the double-layer corrugated steel plate structure and the engaging tooth design. In practical applications, this design can better adapt to complex geological conditions and the challenges brought by high fill, providing a strong guarantee for the stability of the ski track. By enhancing the anti-shear ability of the connecting plate and the reliability of the connection, the present invention can effectively prevent the filling blocks on both sides of the ski track from sliding relatively under the action of high fill, thus significantly improving the overall stability of the ski track and laying a solid foundation for the safe operation of the ski track.

[0057] In another technical solution, a steel-plastic composite layer is wrapped on the surface of the geogrid 6 of the present invention, and this steel-plastic composite layer adopts a three-dimensional node strengthening process. Specifically, spherical convex nodes are provided at the intersections of the transverse rib plates and the longitudinal main bars. The height of these convex nodes is 1.5 times the thickness of the grid, and the spacing is not greater than 50 mm. This design significantly enhances the connection strength between the geogrid 6 and the soil mass. During the construction process, the geogrid 6 is laid on the surface of the filling block. The steel-plastic composite layer and the spherical convex node design on its surface enable a good interlocking and biting effect to be generated between the geogrid 6 and the soil mass. The spherical convex nodes can effectively transfer the stress between the soil mass and the support structure, preventing relative sliding, thereby further improving the stability of the filling block.

[0058] The application of the steel-plastic composite layer and the three-dimensional node strengthening process has remarkable practicality and advantages in high-fill ski tracks. The surface of the traditional geogrid 6 is relatively smooth, with a poor interlocking and biting effect with the soil mass and is difficult to effectively transfer stress. However, the geogrid 6 of the present invention effectively solves this problem through the steel-plastic composite layer and the spherical convex node design. In practical applications, this design can better adapt to complex geological conditions and the challenges brought by high fills, providing a strong guarantee for the stability of the ski track. By enhancing the connection strength and the interlocking and biting effect between the geogrid 6 and the soil mass, the present invention can effectively prevent the relative sliding of the filling blocks on both sides of the ski track under the action of high fills, thereby significantly improving the overall stability of the ski track and laying a solid foundation for the safe operation of the ski track.

[0059] In another technical solution, the drain pipe 7 of the present invention is uniquely designed and includes multiple components such as a pipe body 7-1, a water flow guiding plate 7-2, a rotating shaft 7-3, a torsion spring 7-4, rotating blades 7-5, and a scraper 7-6. The water flow guiding plate 7-2 is installed on the upstream inner wall of the pipe body 7-1, and its arc-shaped structure can effectively guide the water flow direction, enabling the water flow to pass through the drain pipe 7 more smoothly. The rotating shaft 7-3 is installed on the inner wall of the pipe body 7-1 through a bearing 7-7, located behind the water flow guiding plate 7-2, and can rotate around the axis of the pipe body 7-1. There are multiple rotating shafts 7-3, distributed along the axis of the pipe body 7-1, with a distance of 3 - 4 meters between adjacent two rotating shafts 7-3. The torsion spring 7-4 is installed along the radial direction of the drain pipe 7, with one end fixed on the inner wall of the pipe body and the other end fixed on the rotating shaft 7-3, providing rotational power for the rotating shaft 7-3. The rotating blades 7-5 are installed on the rotating shaft 7-3, and the scraper 7-6 is installed on the rotating shaft 7-3 along the axis direction of the pipe body 7-1, rotating with the rotation of the rotating shaft 7-3. One side of the scraper 7-6 is closely attached to the inner wall of the pipe body 7-1, and its length is controlled between 1 / 2 - 2 / 3 of the diameter of the pipe body 7-1. This design enables the rotating blades 7-5 and the scraper 7-6 to effectively prevent the drain pipe 7 from being blocked when water flows through, ensuring the long-term stable operation of the drainage system.

[0060] During the construction process, the drain pipe 7 is longitudinally arranged along the ski track, and multiple drainage holes are provided on the pipe wall to ensure smooth drainage of water. The outside of the drain pipe 7 is wrapped with a permeable geotextile to prevent sediment from blocking the drainage holes. The outside of the permeable geotextile is backfilled with gravel with a particle size of 10 - 20 mm, and the backfilling thickness is 300 mm to enhance the drainage effect. At the same time, it prevents sediment from entering the pipe, thereby reducing the risk of blockage.

[0061] After the water flow enters the drain pipe, it first passes through the water flow guiding plate. The guiding plate has an arc-shaped structure and can guide the water flow direction to make it pass through the pipe more smoothly. The kinetic energy of the water flow drives the rotating blades to rotate. The rotating blades can rotate continuously through the action of the rotating shaft and the torsion spring. This is because the torsion spring is installed along the radial direction of the pipe body and can provide a torsional force for the rotating shaft. When the water flow impacts the rotating shaft and causes the scraper to rotate, the torsion spring will stretch or compress, storing elastic potential energy. When the impact force of the water flow disappears, the torsion spring releases the elastic potential energy, enabling the rotating shaft and the scraper to return to the initial position and realizing the reset function. The rotation of the rotating blades drives the movement of the scraper. The scraper is closely attached to the inner wall of the pipe and can scrape off the silt and dirt attached to the inner wall. This design can not only effectively prevent the drain pipe from being blocked but also ensure the long-term stable operation of the drainage system, significantly improving the stability and safety of the ski track.

[0062] In another technical solution, a water baffle is installed at the end of the drain pipe 7 of the present invention. The water baffle is installed on the inner wall of the pipe body 7-1 downstream, 1.5 - 1.7 meters behind the last rotating shaft 7-3. This design can effectively reduce the impact of water flow, prevent damage to the end of the drain pipe 7, and is inclined at a certain angle with the pipe body.

[0063] The traditional design of the drain pipe 7 often lacks effective end protection measures, resulting in prominent problems of water flow impact and sediment deposition. The present invention effectively solves this problem by installing a water baffle at the end of the drain pipe 7. In practical applications, the water baffle can significantly reduce the impact of water flow, prevent damage to the end of the drain pipe 7, and at the same time block sediment from entering the end of the drain pipe 7, reduce sediment deposition, and ensure the long-term stable operation of the drainage system. This design has significant practicality and advantages in high-fill ski slopes, can effectively cope with complex geological conditions and challenges brought by high fills, and provides a strong guarantee for the stability of the ski slope.

[0064] By installing a water baffle at the end of the drain pipe 7, the impact of water flow can be effectively reduced, and damage to the end of the drain pipe 7 can be prevented. At the same time, the water baffle can block sediment from entering the end of the drain pipe 7, reduce sediment deposition, and ensure the long-term stable operation of the drainage system. This design has significant practicality and advantages in high-fill ski slopes, can effectively cope with complex geological conditions and challenges brought by high fills, and significantly improves the stability of the ski slope.

[0065] In another technical solution, the rotating blade 7-5 of the present invention is in a curved shape, and its installation angle is between 30° and 60°. This design can significantly improve the water flow power and enhance the drainage efficiency. In the drain pipe 7, when water flows through, it will drive the rotating blade 7-5 to rotate. The curved rotating blade 7-5 can generate greater power when water flows through, thereby effectively preventing the drain pipe 7 from being blocked and ensuring the long-term stable operation of the drainage system. The reasonable design of the installation angle enables the rotating blade 7-5 to generate the best power effect when water flows through, further improving the drainage efficiency.

[0066] In another technical solution, three water flow guiding plates 7-2 are installed inside the drain pipe 7 of the present invention, including two sub-water flow guiding plates 7-3-1 and one main water flow guiding plate. The two sub-water flow guiding plates 7-3-1 are located on the same radial section of the pipe, about 1 / 4 of the pipe diameter away from the inlet, and are symmetrically arranged on both sides of the pipe. The main water flow guiding plate is located below the two sub-water flow guiding plates, and its end faces the rotating blade 7-5. The main diversion pipe is located at the rear side of the sub-diversion pipe. All three water flow guiding plates are triangular water flow guiding plates, and the size of the main water flow guiding plate is larger than that of the sub-water flow guiding plates. This design can effectively guide the water flow and ensure uniform water flow distribution. In the drain pipe 7, the water flow first passes through the sub-water flow guiding plates for preliminary guidance, and then passes through the main water flow guiding plate for further guidance, and finally flows to the rotating blade 7-5, thereby achieving efficient water flow guidance and power enhancement.

[0067] The traditional design of the drain pipe 7 often lacks an effective water flow guiding device, resulting in uneven water flow distribution and affecting the drainage efficiency. However, the present invention effectively solves this problem by designing three water flow guiding plates, including two sub-water flow guiding plates and one main water flow guiding plate. In practical applications, the reasonable layout of the sub-water flow guiding plates and the main water flow guiding plate can improve the water flow power, enhance the drainage efficiency, and ensure uniform water flow distribution. This design has significant practicality and advantages in high-fill ski slopes, and can effectively cope with complex geological conditions and the challenges brought by high fills, providing a strong guarantee for the stability of the ski slope.

[0068] Another technical solution also provides a construction method for the stability control structure of the large slope high-fill ski slope, including the following steps:

[0069] S1. Site cleaning and measurement positioning

[0070] Clean the construction site and remove surface debris. Use measuring instruments to measure the center line of the ski slope, slope gradient, etc., and determine the accurate positions of structures such as anti-slide piles and drain pipes;

[0071] S2. Anti-slide pile construction

[0072] Pile position lofting: Along the width direction of the ski slope, loft the positions of the anti-slide piles according to the designed spacing. Pile hole excavation: Use machinery or manual labor to excavate the pile holes to ensure that the hole diameter and depth meet the design requirements. Pile body pouring: Bind steel reinforcement cages in the pile holes and pour concrete to form the pile body of the part of the anti-slide pile embedded in the stable stratum, and the cross-sectional area of the pile body is larger than that of the above-ground part;

[0073] S3. Connecting plate installation

[0074] Install the first connecting plate between adjacent anti-slide piles to ensure firm connection. Install the second connecting plate on both sides of the top of the anti-slide pile;

[0075] S4, Press Plate and Geogrid Laying

[0076] Install a press plate at the top of the anti-slide pile. The surface of the press plate is provided with engaging teeth to form a two-way locking mechanism with the second connecting plate. Lay the geogrid on the surface of the filling block;

[0077] S5, Drainage Structure Construction

[0078] Drain Pipe Installation: Arrange drain pipes longitudinally along the ski track. For the protection of the drain pipes, wrap permeable geotextiles on the outside of the drain pipes, and backfill with gravel with a particle size of 10 - 20 mm on the outside, with a backfill thickness of 300 mm;

[0079] S6, Filling Block Construction

[0080] Carry out filling block construction on both sides of the ski track to ensure the filling quality and the compaction degree meets the design requirements;

[0081] S7, Quality Inspection and Acceptance

[0082] Conduct a comprehensive inspection on the completed stability control structure to ensure that the construction quality meets the design requirements.

[0083] Although the embodiments of the present invention have been disclosed as above, they are not limited to only the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily achieved. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples here.

Claims

1. A stable control structure for a large slope high-fill ski track, with filling blocks arranged on both sides of the ski track respectively, characterized in that, The described stability control structure includes anti-slide piles, pressing plates, first connecting plates, second connecting plates, and geogrids. Among them, a plurality of the anti-slide piles are arranged below the ski track, and adjacent anti-slide piles along the width direction of the ski track are connected by the first connecting plates. Part of the anti-slide piles are embedded in the stable stratum of the ski track. Pressing plates, second connecting plates, and geogrids are respectively arranged on both sides of the top of the anti-slide piles. The main reinforcement of the above-ground part of the anti-slide piles is connected to the geogrid through the pressing plates and the second connecting plates. The geogrid is laid on the surface of the filling block; the length of the anti-slide pile embedded in the stable stratum is not less than 1 / 3 of the pile length and penetrates 2 meters below the potential slip surface; the surface of the geogrid is provided with embossed patterns or convex nodes to enhance the interlocking bite with the soil; the stability control structure further includes a drainage structure arranged below the ski track and below the filling block. The drainage structure includes a drain pipe arranged longitudinally along the ski track. The outlet of the drain pipe is connected to a drainage ditch below the ski track. A plurality of drainage holes are provided on the pipe wall of the drain pipe. The outside of the drain pipe is wrapped with a permeable geotextile, and gravel is backfilled outside the permeable geotextile; the drain pipe includes: a pipe body, which is a long straight pipe; a water flow guiding plate, which is installed upstream on the inner wall of the pipe body, and the water flow guiding plate is arc-shaped; a rotating shaft, which is circumferentially installed on the inner wall of the pipe body through a bearing and is located behind the water flow guiding plate. The rotating shaft can rotate self-axis along the axis of the pipe body; there are a plurality of rotating shafts, which are distributed along the axis of the pipe body, and the distance between adjacent two rotating shafts is 2-3 times the diameter of the pipe body; a torsion spring, which is installed radially along the pipe body. The central hole of the torsion spring is aligned with the rotating shaft. One end of the torsion spring is fixed on the inner wall of the pipe body, and the other end is fixed on the rotating shaft; a rotating blade, which is installed on the rotating shaft; a scraping plate, which is installed on the rotating shaft along the axis direction of the pipe body; the rotating blade is in a bent shape, and its installation angle is between 30° and 60°; there are 3 water flow guiding plates, including 2 sub-water flow guiding plates and 1 main water flow guiding plate. The two sub-water flow guiding plates are located on the same radial section of the pipe, at a position 1 / 4 of the pipe diameter away from the inlet, symmetrically arranged on both sides of the pipe. The main water flow guiding plate is located below the two sub-water flow guiding plates. The main water flow guiding plate is located behind the sub-water flow guiding plates. The end of the main water flow guiding plate faces the rotating blade.

2. The stable control structure of the large slope high fill ski track according to claim 1, characterized in that The anti-slide pile is arranged with a variable cross-section. The cross-sectional area of the pile body of the part embedded in the stable stratum is larger than that of the above-ground part. A conical transition section is arranged at the variable cross-section. Annular grooves are arranged on the surface of the conical transition section to form a bite structure with the surrounding soil and enhance the anti-pulling force.

3. The stable control structure of the large slope high fill ski track according to claim 1, characterized in that, The second connecting plate is a double-layer corrugated steel plate structure. The corrugation direction thereof forms a 45° angle with the extending direction of the ski track. Biting teeth matching the corrugation of the second connecting plate are arranged on the surface of the pressing plate to form a two-way locking mechanism.

4. The stable control structure of the large slope high fill ski track according to claim 1, characterized in that, A geogrid is wrapped with a steel-plastic composite layer on its surface. The steel-plastic composite layer adopts a three-dimensional node reinforcement process. Spherical convex nodes are arranged at the intersections of the transverse rib plates and the longitudinal main bars. The height of the convex nodes is 1.5 times the thickness of the geogrid, and the spacing is not greater than 50 mm.

5. The stable control structure of the large slope high fill ski track according to claim 1, characterized in that, As the rotating shaft rotates, the scraper also rotates accordingly, and one side of the scraper is closely attached to the inner wall of the pipeline body. The length of the scraper is controlled between 1 / 2 and 2 / 3 of the diameter of the pipeline body.

6. The stable control structure of the large slope high fill ski track according to claim 5, characterized in that, The water baffle is installed downstream of the inner wall of the pipeline body and is located 1.5 m - 1.7 m behind the last rotating shaft.

7. The stable control structure of the large slope high-fill ski track according to claim 1, wherein All three water flow guiding plates are triangular water flow guiding plates, and the size of the main water flow guiding plate is larger than that of the sub-water flow guiding plates.

8. The construction method of the stability control structure of the large slope high fill ski track according to any one of claims 1-7, characterized in that, It includes the following steps: S1. Site cleaning and measurement positioning Clean the construction site, remove surface debris, and use measuring instruments to measure the center line of the ski track and the slope gradient to determine the accurate positions of the anti-slide piles and the drain pipes. S2. Construction of anti-slide piles Pile position lofting: Along the width direction of the ski track, lay out the pile positions of the anti-slide piles at the designed spacing. For pile hole excavation, use machinery or manual labor to excavate the pile holes to ensure that the hole diameter and depth meet the design requirements. For pile body pouring, bind the steel reinforcement cage in the pile hole and pour concrete to form the pile body of the anti-slide pile embedded in the stable stratum, and the cross-sectional area of the part embedded in the stable stratum is larger than that of the above-ground part. S3. Installation of connecting plates Install the first connecting plate between adjacent anti-slide piles to ensure firm connection, and install the second connecting plate on both sides of the top of the anti-slide pile. S4. Laying of pressure plates and geogrids Install pressure plates on the top of the anti-slide piles. The surface of the pressure plates is provided with engaging teeth to form a two-way locking mechanism with the second connecting plates. Lay the geogrids on the surface of the filling blocks. S5. Construction of drainage structures Drain pipe installation: Arrange drain pipes longitudinally along the ski track. For drain pipe protection, wrap a permeable geotextile on the outside of the drain pipes, and backfill with gravel with a particle size of 10 - 20 mm on the outside, and the backfill thickness is 300 mm. S6. Construction of filling blocks Carry out the construction of filling blocks on both sides of the ski track to ensure the filling quality, and the compaction degree meets the design requirements. S7. Quality inspection and acceptance Conduct a comprehensive inspection on the completed stable control structure to ensure that the construction quality meets the design requirements.

Images