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

Abstract

The invention relates to a stability control structure and method for a large-slope high-fill skiing track, and the stability control structure comprises anti-slide piles, a pressing plate, a first connecting plate, a second connecting plate and a geogrid. The anti-slide piles are arranged below a skiing track, the adjacent anti-slide piles are connected through the first connecting plates and partially embedded into a stable stratum, main ribs of the overground part of the anti-slide piles are connected with the geogrids through the pressing plates and the second connecting plates, and the geogrids are laid on the surfaces of the filling blocks. Drainage pipes are longitudinally arranged along the skiing track, drainage holes are formed in the pipe walls, and the outer sides of the drainage pipes are wrapped with permeable geotextile and backfilled with gravels. The structure is mainly used for improving the stability of the large-slope high-fill skiing track, preventing landslide, solving the drainage problem and ensuring safe use and long-term stable operation of the skiing track.

Description

Technical Field

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

[0002] In the engineering practice of high-fill ski tracks with large slopes, the stability control of high-fill slopes has always been a technical challenge. Since the ski track needs to be built on steep terrain or thick fill, its deadweight load and repeated freezing and thawing can easily lead to potential sliding surfaces in the fill, forming sliding damage along the weak structural surface. Although the traditional anti-slide pile support system can provide a certain lateral resistance, there are the following outstanding problems: First, the collaborative performance of the anti-slide piles is insufficient. In conventional designs, each anti-slide pile is mostly in an independent stress state, lacking effective lateral connection components, and it is difficult to form an overall structure that resists sliding forces. When the fill body 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 exert, resulting in insufficient overall support stiffness. Secondly, there are defects in groundwater seepage control. Aquifers are easily formed in high fill bodies. Traditional drainage systems mostly use direct drainage infiltration ditches, which lack anti-filtration protection and lead to the loss of fine particles, causing drainage channel blockage. At the same time, the softening effect of groundwater seepage on potential sliding surfaces was 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 and increase the risk of landslides. These factors work together to make the stability control of the large-slope high-fill ski track a complex technical problem. Summary of the invention

[0003] In the construction of a ski track with large slopes and high fill, traditional support structures are unable to effectively deal with the landslide risk caused by high fill. The fill blocks on both sides of the ski track are prone to lose stability due to soil sliding under the action of high fill, causing deformation or damage to the track. In addition, the connection strength between the fill 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 under the ski track is not designed reasonably, resulting in water accumulation and increasing the risk of slope sliding.

[0004] Preferably, the present invention provides a stability control structure for a large-slope high-fill ski track, wherein filling blocks are respectively arranged on both sides of the ski track, and the stability control structure comprises anti-slip piles, a pressure plate, a first connecting plate, a second connecting plate and a geogrid, wherein a plurality of the anti-slip piles are arranged below the ski track, and adjacent anti-slip piles along the width direction of the ski track are connected by a first connecting plate, and the anti-slip piles are partially embedded in the stable stratum of the ski track, and a pressure plate, a second connecting plate and a geogrid are respectively arranged on both sides of the top of the anti-slip piles, and the main reinforcement of the above-ground part of the anti-slip piles is connected to the geogrid through the pressure plate and the second connecting plate, and the geogrid is laid on the filling blocks. surface; the length of the anti-sliding pile embedded in the stable stratum is not less than 1 / 3 of the pile length, and penetrates 2 meters below the potential sliding surface; embossing or convex nodes are arranged on the surface of the geogrid to enhance the interlocking and bite with the soil; the stable control structure also includes a drainage structure arranged below the ski track and below the filling block, the drainage structure includes a drainage pipe arranged longitudinally along the ski track, the outlet of the drainage pipe is connected to the drainage ditch below the ski track, a plurality of drainage holes are arranged on the wall of the drainage pipe, the outer side of the drainage pipe is wrapped with a permeable geotextile, the outer side of the permeable geotextile is backfilled with crushed stone with a particle size of 10-20 mm, and the backfill thickness of the crushed stone is 300 mm.

[0005] The present invention forms a comprehensive stability control structure by arranging anti-slip piles, pressure plates, connecting plates and geogrids, which can effectively enhance the stability of the filling blocks on both sides of the ski track. The anti-slip piles are partially embedded in the stable stratum and penetrate the potential sliding surface, which significantly improves the anti-slip ability of the slope. The embossed or convex node design on the surface of the geogrid enhances the interlocking and bite with the soil, further improving 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 improves the stability and safety of the ski track as a whole.

[0006] The application of traditional anti-slip piles in high-fill ski tracks has the problem of insufficient pull-out resistance. Due to the high fill effect of the filling blocks on both sides of the ski track, the anti-slip piles are prone to insufficient pull-out resistance when subjected to large vertical loads, resulting in relative sliding between the anti-slip piles and the surrounding soil, affecting the overall stability.

[0007] Preferably, the anti-sliding piles of the present invention adopt a variable cross-section setting, wherein the cross-sectional area of ​​the pile body embedded in the stable stratum is larger than that of the above-ground part, and a conical transition section is provided at the variable cross-section. The surface of the transition section is provided with an annular groove to form a bite structure with the surrounding soil to enhance the pull-out 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 the 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 is significantly improved. The design of the spherical convex node further enhances the interlocking effect, effectively transfers the stress between the soil and the support structure, and prevents relative sliding. This design has significant practicality and advantages in high-fill ski tracks, can effectively cope with complex geological conditions and the challenges brought by high fill, and significantly improves the stability of the ski track.

[0015] In the large slope and high fill ski track, the traditional drainage pipe design has the problems of low drainage efficiency and easy clogging. The drainage system under the ski track needs to operate efficiently under complex geological conditions. The water flow guidance and anti-clogging design of the traditional drainage pipe 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 guide plate, which is installed upstream of the inner wall of the pipe body, and the water flow guide plate is arc-shaped; a rotating shaft, which is installed on the inner wall of the pipe body through a bearing and is located on the rear side of the water flow guide plate, and the rotating shaft can rotate about 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 two adjacent rotating shafts is 2-3 times the diameter of the pipe body; a torsion spring, which is installed along the radial direction of the pipe body, and 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 scraper, which is on the rotating shaft along the axial direction of the pipe body, and as the rotating shaft rotates, the scraper also rotates, and one side of the scraper is close to the inner wall of the pipe body, and the length of the scraper is controlled between 1 / 2-2 / 3 of the diameter of the pipe body.

[0017] By designing the water flow guide plate, rotating shaft, torsion spring, rotating blade and scraper, the drain pipe can achieve efficient water flow guidance and automatic cleaning functions. The arc design of the water flow guide plate can guide the water flow smoothly, and the combination of rotating blades and scrapers 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 tracks, and can effectively cope with complex geological conditions and the challenges brought by high fill, significantly improving the stability of the ski track.

[0018] In the large slope high fill ski track, the traditional drainage pipe design lacks effective end protection measures, resulting in water flow impact and sediment deposition problems. Water flow impact at the end of the drainage pipe may cause damage to the drainage pipe, and sediment deposition will reduce 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 pipeline body and is located 1.5m-1.7m behind the last rotating shaft.

[0020] By installing a water retaining plate at the end of the drainage pipe, the impact of water flow can be effectively reduced and the end of the drainage pipe can be prevented from being damaged. At the same time, the water retaining plate can prevent silt from entering the end of the drainage pipe, reduce silt deposition, and ensure the long-term stable operation of the drainage system.

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

[0022] Preferably, the rotary blades of the present invention are curved in shape, and the installation angle thereof is between 30° and 60°.

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

[0024] Preferably, the present invention has three guide plates, including two sub-guide plates and one main guide plate. The two sub-guide plates are located on the same radial section of the pipeline, about 1 / 4 of the pipeline diameter away from the inlet, and are symmetrically arranged on both sides of the pipeline. The main guide plate is located below the two sub-guide plates, and the end of the main guide plate faces the rotating blades. The three guide plates are all 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 distribution. The reasonable layout of the sub-guide plates and the main guide plates can improve the water flow dynamics and enhance drainage efficiency. This design has significant practicality and advantages in high-fill ski tracks, can effectively cope with complex geological conditions and the challenges brought by high fill, and significantly improve the stability of the ski track.

[0026] The present invention also provides a construction method for the stable control structure of the large slope high fill ski track, comprising the following steps: S1. Site cleaning and measurement and positioning Clean up the construction site and remove surface debris. Use measuring instruments to measure the center line of the ski track, slope gradient, etc., and determine the exact location of anti-slip piles, drainage pipes and other structures; S2. Anti-slide pile construction Pile position setting out Anti-slip piles are set out along the width of the ski track according to the designed spacing. Pile hole excavation is done by mechanical or manual excavation to ensure that the hole diameter and depth meet the design requirements. The pile body is cast in the pile hole, and the steel cage is tied and concrete is poured to form an anti-slip pile. The cross-sectional area of ​​the pile body embedded in the stable stratum is larger than the above-ground part; S3. Installation of connecting plate The first connecting plate is installed between adjacent anti-slip piles to ensure a firm connection. The second connecting plate is installed on both sides of the top of the anti-slip piles. S4. Laying of pressure plates and geogrids A pressure plate is installed on the top of the anti-sliding pile, and engaging teeth are arranged on the surface of the pressure plate to form a bidirectional locking mechanism with the second connecting plate. The geogrid is laid on the surface of the filling block; S5. Drainage structure construction Drainage pipe installation: Drainage pipes are arranged longitudinally along the ski track. The drainage pipes are protected by wrapping the outer side of the drainage pipes with permeable geotextiles, and the outer side is backfilled with gravel with a particle size of 10-20 mm and a backfill thickness of 300 mm. S6. Filling block construction Carry out fill block construction on both sides of the ski track to ensure the quality of the fill and the compaction degree meets the design requirements; S7. Quality inspection and acceptance Carry out a comprehensive inspection of the completed stable control structure to ensure that the construction quality meets the design requirements.

[0027] The present invention includes at least the following beneficial effects: The present invention adopts a variable cross-section design through the reasonable design of anti-sliding piles, which are partially embedded in the stable stratum and penetrate 2 meters below the potential sliding surface, and adopts a variable cross-section design to enhance the pull-out resistance and anti-sliding ability. The double-layer corrugated steel plate structure of the second connecting plate and the bite tooth design of the pressure 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 bite effect with the soil, effectively transfer stress, and prevent relative sliding. The optimized design of the drainage structure, including the drainage pipes arranged longitudinally along the ski track, the drainage holes on the pipe wall, the permeable geotextile and the gravel backfill layer, effectively solves the problem of water accumulation and reduces the risk of sliding. The water flow guide plate, rotating blades and scrapers inside the drainage pipe realize efficient water flow guidance 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, each step is strictly carried out in accordance with the design requirements to ensure that the construction quality meets the standards. On the whole, the present invention not only significantly improves the stability of the ski track, but also improves the construction quality and operational safety, providing a strong guarantee for the long-term stable operation of the ski track. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the layout structure of the stability control structure of the large slope high fill ski track in the present invention.

[0029] Figure 2 It is a schematic diagram of the structure of the drainage pipe in the present invention.

[0030] Figure 3 It is a schematic diagram of the structure of the torsion spring in the present invention.

[0031] Figure 4 It is a schematic structural diagram of the anti-slide pile in the present invention. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0033] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0034] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0035] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0036] like Figure 1-4 As shown, a technical solution of the present invention provides a stable control structure for a large-slope high-fill ski track, which uses components such as anti-slip piles 1, pressure plates 4 and geogrids 6 to work together to enhance the stability of the filling blocks on both sides of the ski track. The anti-slip piles 1 are arranged along the width direction of the ski track 2, and adjacent anti-slip piles 1 are connected by a first connecting plate 3 to form a stable support system. The anti-slip piles 1 partially penetrate into the stable stratum below the ski track 2, and their embedded length is not less than one-third of the pile length, and penetrates two meters below the potential sliding surface, thereby providing a solid anti-slip foundation for the slope. The main reinforcement of the above-ground part of the anti-slip pile 1 is connected to the pressure plate 4 through the second connecting plate 5, and finally connected to the geogrid 6 laid on the surface of the filling block. The embossed or convex node design on the surface of the geogrid 6 enables it to produce a good interlocking and biting effect with the soil, further enhancing the stability of the filling block. In addition, the stability control structure also includes a drainage structure. The drainage pipe 7 is arranged longitudinally along the ski track 2. The pipe wall is covered with drainage holes and wrapped with a permeable geotextile on the outside. It is backfilled with gravel with a particle size of 10-20 mm and a backfill thickness of 300 mm. Such a drainage structure can effectively drain groundwater and surface water, and prevent water accumulation from adversely affecting the stability of the slope.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] This anti-slip pile 1 with a variable cross-section design has significant practicality and advantages in high-fill ski tracks. The traditional anti-slip pile 1 is prone to insufficient pull-out resistance under the action of high fill, and the anti-slip pile 1 of the present invention effectively solves this problem through the variable cross-section design and the setting of a conical transition section and annular groove. In practical applications, the anti-slip pile 1 can better adapt to complex geological conditions and provide a strong guarantee for the stability of the ski track. By enhancing the pull-out resistance of the anti-slip 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, thereby significantly improving the overall stability of the ski track and laying a solid foundation for the safe operation of the ski track.

[0041] 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 is at an angle of 45° to the extension direction of the ski track. This structural design can effectively disperse stress and enhance the shear resistance of the connecting plate. The surface of the pressing plate 4 is provided with bite teeth that match the corrugation of the second connecting plate 5. When the pressing plate 4 and the second connecting plate 5 are installed together, the bite teeth and the corrugation are interlocked 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-slip piles 1. During the construction process, the second connecting plate 5 is installed on both sides of the top of the anti-slip pile 1 to ensure a firm and reliable connection. The pressing plate 4 is installed on the top of the anti-slip pile 1, and the bite teeth on its surface match the corrugation of the second connecting plate 5 to form a two-way locking mechanism. This design can effectively disperse stress, enhance the shear resistance of the connecting plate, and further improve the reliability of the connection.

[0042] The second connecting plate 5 with a double-layer corrugated steel plate structure and the meshing tooth design have significant practicality and advantages in high-fill ski tracks. The traditional connecting plate design is prone to insufficient connection strength under the action of high fill, thus affecting the overall stability. The second connecting plate 5 of the present invention effectively solves this problem through the double-layer corrugated steel plate structure and the meshing tooth design. In practical applications, this design can better adapt to complex geological conditions and the challenges brought by high fill, and provide a strong guarantee for the stability of the ski track. By enhancing the shear resistance of the connecting plate and the reliability of the connection, the present invention can effectively prevent the fill blocks on both sides of the ski track from sliding relative to each other under the action of high fill, thereby significantly improving the overall stability of the ski track and laying a solid foundation for the safe operation of the ski track.

[0043] In another technical solution, the surface of the geogrid 6 of the present invention is wrapped with a steel-plastic composite layer, and this steel-plastic composite layer adopts a three-dimensional node reinforcement process. Specifically, spherical convex nodes are provided at the intersection of the transverse ribs and the longitudinal main reinforcement. The height of these convex nodes is 1.5 times the thickness of the grid, and the spacing is not more than 50 mm. This design significantly enhances the connection strength between the geogrid 6 and the soil. During the construction process, the geogrid 6 is laid on the surface of the filling block, and the steel-plastic composite layer and the spherical convex node design on its surface enable a good interlocking and bite effect to be produced between the geogrid 6 and the soil. The spherical convex nodes can effectively transfer the stress between the soil and the support structure, prevent relative sliding, and further improve the stability of the filling block.

[0044] The application of steel-plastic composite layer and three-dimensional node reinforcement technology has significant practicality and advantages in high-fill ski tracks. The surface of the traditional geogrid 6 is relatively smooth, and the interlocking and biting effect with the soil is poor, making it difficult to effectively transfer stress. The geogrid 6 of the present invention effectively solves this problem through the steel-plastic composite layer and spherical convex node design. In practical applications, this design can better adapt to complex geological conditions and the challenges brought by high fill, and provide a strong guarantee for the stability of the ski track. By enhancing the connection strength and interlocking and biting effect between the geogrid 6 and the soil, the present invention can effectively prevent the fill blocks on both sides of the ski track from sliding relative to each other under the action of high fill, thereby significantly improving the overall stability of the ski track and laying a solid foundation for the safe operation of the ski track.

[0045] In another technical solution, the drain pipe 7 of the present invention is uniquely designed, including a pipe body 7-1, a water flow guide plate 7-2, a rotating shaft 7-3, a torsion spring 7-4, a rotating blade 7-5 and a scraper 7-6. The water flow guide plate 7-2 is installed upstream of the inner wall of the pipe body 7-1, and its arc structure can effectively guide the direction of water flow, so that the water flow passes 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 on the rear side of the water flow guide plate 7-2, and can rotate along the axis of the pipe body 7-1. There are multiple rotating shafts 7-3, which are distributed along the axis of the pipe body 7-1, and the distance between two adjacent rotating shafts 7-3 is 3-4 meters. The torsion spring 7-4 is installed along the radial direction of the drain pipe 7, one end of which is fixed on the inner wall of the pipe body, and the other end is fixed on the rotating shaft 7-3, providing rotational power for the rotating shaft 7-3. The rotating blade 7-5 is mounted on the rotating shaft 7-3, and the scraper 7-6 is mounted on the rotating shaft 7-3 along the axial direction of the pipe body 7-1. The scraper 7-6 rotates with the rotation of the rotating shaft 7-3. One side of the scraper 7-6 is close to the inner wall of the pipe body 7-1, and its length is controlled between 1 / 2 and 2 / 3 of the diameter of the pipe body 7-1. This design enables the rotating blade 7-5 and the scraper 7-6 to effectively prevent the drain pipe 7 from being blocked when water flows through, thereby ensuring the long-term stable operation of the drainage system.

[0046] During the construction process, the drainage pipe 7 is arranged longitudinally along the ski track, and multiple drainage holes are set on the pipe wall to ensure smooth drainage of water. The outer side of the drainage pipe 7 is wrapped with a permeable geotextile to prevent mud and sand from clogging the drainage holes. The outer side of the permeable geotextile is backfilled with gravel with a particle size of 10-20 mm and a backfill thickness of 300 mm to enhance the drainage effect. At the same time, it prevents mud and sand from entering the pipe, thereby reducing the risk of blockage.

[0047] After the water flows into the drain pipe, it first passes through the water flow guide plate, which is an arc-shaped structure that can guide the direction of the water flow so that it can pass through the pipe more smoothly. The kinetic energy of the water flow drives the rotating blades to rotate. The rotating blades can continue to rotate 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 torsional force for the rotating shaft. When the water flow impacts the rotating shaft to rotate the scraper, the torsion spring will stretch or compress to store elastic potential energy. When the impact force of the water flow disappears, the torsion spring releases the elastic potential energy, so that the rotating shaft and the scraper return to the initial position to achieve the reset function. The rotation of the rotating blade drives the scraper to move. The scraper is close 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 blockage of the drain pipe, but also ensure the long-term stable operation of the drainage system, significantly improving the stability and safety of the ski track.

[0048] In another technical solution, a water baffle is installed at the end of the drain pipe 7 of the present invention, and the water baffle is installed downstream of the inner wall of the pipe body 7-1, and is located 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 tilted at a certain angle to the pipe body.

[0049] 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 retaining plate at the end of the drain pipe 7. In practical applications, the water retaining plate can significantly reduce the impact of water flow and prevent damage to the end of the drain pipe 7. At the same time, it 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 tracks, can effectively cope with complex geological conditions and the challenges brought by high fill, and provides a strong guarantee for the stability of the ski track.

[0050] By installing a water retaining plate at the end of the drainage pipe 7, the impact of water flow can be effectively reduced and the end of the drainage pipe 7 can be prevented from being damaged. At the same time, the water retaining plate can prevent silt from entering the end of the drainage pipe 7, reduce silt deposition, and ensure the long-term stable operation of the drainage system. This design has significant practicality and advantages in high-fill ski tracks, can effectively cope with complex geological conditions and challenges brought by high fill, and significantly improves the stability of the ski track.

[0051] In another technical solution, the rotary blade 7-5 of the present invention is curved, 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, the water flow will drive the rotary blade 7-5 to rotate when passing through. The curved rotary blade 7-5 can generate greater power when the water flow passes 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 rotary blade 7-5 to produce the best power effect when the water flows through, further improving the drainage efficiency.

[0052] In another technical solution, three water flow guide plates 7-2 are installed inside the drain pipe 7 of the present invention, including two water flow guide plates 7-3-1 and one main water flow guide plate. The two water flow guide plates 7-3-1 are located on the same radial section of the pipeline, about 1 / 4 of the pipeline diameter away from the inlet, and are symmetrically arranged on both sides of the pipeline. The main water flow guide plate is located below the two water flow guide plates, and its end faces the rotating blade 7-5. The main diversion pipe is located at the rear side of the diversion pipe, and the three water flow guide plates are all triangular water flow guide plates. The size of the main water flow guide plate is larger than that of the diversion water flow guide plate. This design can effectively guide the water flow and ensure uniform water flow distribution. In the drain pipe 7, the water flow is first initially guided by the diversion water flow guide plate, and then further guided by the main water flow guide plate, and finally flows to the rotating blade 7-5, thereby achieving efficient water flow guidance and power enhancement.

[0053] The traditional design of the drainage pipe 7 often lacks an effective water flow guide device, resulting in uneven water flow distribution and affecting drainage efficiency. The present invention effectively solves this problem by designing three water flow guide plates, including two water flow guide plates and one main water flow guide plate. In practical applications, the reasonable layout of the water flow guide plates and the main water flow guide plates can improve the water flow dynamics, enhance drainage efficiency, and ensure uniform water flow distribution. This design has significant practicality and advantages in high-fill ski tracks, can effectively cope with complex geological conditions and the challenges brought by high fill, and provides a strong guarantee for the stability of the ski track.

[0054] Another technical solution also provides a construction method for the stable control structure of the large slope high fill ski track, comprising the following steps: S1. Site cleaning and measurement and positioning Clean up the construction site and remove surface debris. Use measuring instruments to measure the center line of the ski track, slope gradient, etc., and determine the exact location of anti-slip piles, drainage pipes and other structures; S2. Anti-slide pile construction Pile position setting out Anti-slip piles are set out along the width of the ski track according to the designed spacing. Pile hole excavation is done by mechanical or manual excavation to ensure that the hole diameter and depth meet the design requirements. The pile body is cast in the pile hole, and the steel cage is tied and concrete is poured to form an anti-slip pile. The cross-sectional area of ​​the pile body embedded in the stable stratum is larger than the above-ground part; S3. Installation of connecting plate The first connecting plate is installed between adjacent anti-slip piles to ensure a firm connection. The second connecting plate is installed on both sides of the top of the anti-slip piles. S4. Laying of pressure plates and geogrids A pressure plate is installed on the top of the anti-sliding pile, and engaging teeth are arranged on the surface of the pressure plate to form a bidirectional locking mechanism with the second connecting plate. The geogrid is laid on the surface of the filling block; S5. Drainage structure construction Drainage pipe installation: Drainage pipes are arranged longitudinally along the ski track. The drainage pipes are protected by wrapping the outer side of the drainage pipes with permeable geotextiles, and the outer side is backfilled with gravel with a particle size of 10-20 mm and a backfill thickness of 300 mm. S6. Filling block construction Carry out fill block construction on both sides of the ski track to ensure the quality of the fill and the compaction degree meets the design requirements; S7. Quality inspection and acceptance Carry out a comprehensive inspection of the completed stable control structure to ensure that the construction quality meets the design requirements.

[0055] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A stable control structure for a large slope high fill ski track, wherein both sides of the ski track are respectively provided with fill blocks, characterized in that: The stable control structure includes anti-slide piles, a pressure plate, a first connecting plate, a second connecting plate and a geogrid, wherein: A plurality of the anti-slip piles are arranged below the ski track, and adjacent anti-slip piles along the width direction of the ski track are connected by a first connecting plate, and the anti-slip piles are partially embedded in the stable stratum of the ski track. A pressure plate, a second connecting plate and a geogrid are arranged on both sides of the top of the anti-slip piles, respectively. The main reinforcement of the above-ground part of the anti-slip piles is connected to the geogrid through the pressure plate and the second connecting plate, and the geogrid is laid on the surface of the filling block; The anti-sliding pile is embedded in the stable stratum for a length not less than 1 / 3 of the pile length and penetrates 2 meters below the potential sliding surface; The surface of the geogrid is provided with embossed or convex nodes to enhance the interlocking and biting with the soil; The stability control structure also includes a drainage structure arranged below the ski track and below the filling block, the drainage structure includes a drainage pipe arranged longitudinally along the ski track, the outlet of the drainage pipe is connected to the drainage ditch below the ski track, a plurality of drainage holes are arranged on the pipe wall of the drainage pipe, the outer side of the drainage pipe is wrapped with a permeable geotextile, and the outer side of the permeable geotextile is backfilled with gravel.

2. The stability control structure of the large slope high fill ski track according to claim 1 is characterized in that: The anti-slide pile adopts a variable cross-section setting, in which the cross-sectional area of ​​the pile body embedded in the stable stratum is larger than the above-ground part. A conical transition section is set at the variable cross-section, and an annular groove is set on the surface of the conical transition section to form a bite structure with the surrounding soil to enhance the pull-out resistance.

3. The stability control structure of the large slope high fill ski track according to claim 1 is characterized in that: The second connecting plate 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.

4. The stability control structure of a large slope high fill ski track according to claim 1, characterized in that: The surface of the geogrid is wrapped with a steel-plastic composite layer, which adopts a three-dimensional node reinforcement process. 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.

5. The stability control structure of the large slope high fill ski track according to claim 1, characterized in that: The drain pipe comprises: The pipeline body, which is a long straight pipeline; A water flow guide plate, which is installed on the upstream of the inner wall of the pipeline body, and the water flow guide plate is arc-shaped; A rotating shaft, which is circumferentially mounted on the inner wall of the pipe body through a bearing and is located behind the water flow guide plate, and the rotating shaft can rotate along 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 two adjacent rotating shafts is 2-3 times the diameter of the pipe body; A torsion spring is installed along the radial direction of the pipeline body, with a central hole of the torsion spring aligned with the rotating shaft, one end of the torsion spring is fixed on the inner wall of the pipeline body, and the other end is fixed on the rotating shaft; Rotating blades mounted on a rotating shaft; The scraper is arranged on the rotating shaft along the axial direction of the pipe body. As the rotating shaft rotates, the scraper also rotates, and one side of the scraper is tightly attached to the inner wall of the pipe body. The length of the scraper is controlled between 1 / 2 and 2 / 3 of the diameter of the pipe body.

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

7. The stability control structure for a large slope high fill ski track according to claim 5, characterized in that: The rotating blades are in a curved shape, and the installation angle thereof is between 30° and 60°.

8. The stability control structure for a large slope high fill ski track according to claim 1, characterized in that: There are three guide plates, including two branch guide plates and one main guide plate. The two branch guide plates are located on the same radial section of the pipeline, about 1 / 4 of the pipeline diameter away from the inlet, and are symmetrically arranged on both sides of the pipeline. The main guide plate is located below the two branch guide plates, and the main guide pipe is located at the rear side of the branch guide pipe. The end of the main guide plate faces the rotating blade. The three guide plates are all triangular guide plates, and the size of the main guide plate is larger than that of the auxiliary guide plates.

9. The construction method of the stability control structure of the large slope high fill ski track according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Site cleaning and measurement and positioning Clean up the construction site, remove surface debris, use measuring instruments to measure the center line of the ski track and the slope of the side slopes, and determine the exact location of anti-slip piles and drainage pipes; S2. Anti-slide pile construction The pile positions are laid out along the width of the ski track according to the designed spacing. The pile holes are excavated mechanically or manually to ensure that the hole diameter and depth meet the design requirements. The pile body is cast in the pile hole and the steel cage is tied. Concrete is poured to form a cross-sectional area of ​​the pile body embedded in the stable stratum that is larger than the above-ground part. S3. Installation of connecting plate The first connecting plate is installed between adjacent anti-slip piles to ensure a firm connection, and the second connecting plate is installed on both sides of the top of the anti-slip pile; S4. Laying of pressure plates and geogrids A pressure plate is installed on the top of the anti-sliding pile, and engaging teeth are arranged on the surface of the pressure plate to form a bidirectional locking mechanism with the second connecting plate. The geogrid is laid on the surface of the filling block; S5. Drainage structure construction Drainage pipe installation: Drainage pipes are arranged longitudinally along the ski track. The drainage pipes are protected by wrapping the outer side of the drainage pipes with permeable geotextiles, and the outer side is backfilled with gravel with a particle size of 10-20 mm and a backfill thickness of 300 mm. S6. Filling block construction Carry out fill block construction on both sides of the ski track to ensure the quality of the fill and the compaction degree meets the design requirements; S7. Quality inspection and acceptance Carry out a comprehensive inspection of the completed stable control structure to ensure that the construction quality meets the design requirements.

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