A corrugated steel plate retaining wall anti-frost heaving structure in an alpine permafrost region

Abstract

The application belongs to the technical field of slope and gully treatment, and discloses a corrugated steel plate retaining wall anti-frost heaving structure in an alpine permafrost region, which comprises a thick graded sand and gravel soil layer; the corrugated steel plate is a flexible thin-walled structure, and its stress and deformation characteristics can effectively bear the soil pressure and frost heaving force when retaining soil in the permafrost region; the corrugated shape not only enhances the stability of the structure, but also effectively resists lateral soil pressure; when the water in the soil in the permafrost region decreases, the water gradually accumulates on the outer wall of the inclined rod, slides downward through the inclined surface of the inclined rod, and then moves to the outer wall of the outer wrapped water permeable geotextile, so that the water can quickly move to the surface of the outer wrapped water permeable geotextile and penetrate into the thick graded sand and gravel filter layer through the water permeability, thereby avoiding the retention of water in the permafrost layer and helping to reduce the frost heaving phenomenon caused by water freezing.

Description

Technical Field

[0001] This invention belongs to the field of slope gully control technology, specifically a corrugated steel plate retaining wall anti-frost heave structure for high-altitude frozen soil regions. Background Technology

[0002] In high-altitude permafrost regions, the frost heave protection structure of corrugated steel plate retaining walls is designed to address the unique challenges posed by permafrost. This frost heave protection structure for corrugated steel plate retaining walls in high-altitude permafrost regions, through a combination of material selection, foundation design, drainage systems, insulation measures, and appropriate monitoring and maintenance, aims to improve the safety and effectiveness of retaining walls under extreme climatic conditions. This design takes into account the characteristics of permafrost and optimizes structural performance, making it an effective solution for engineering projects in high-altitude and cold environments.

[0003] The prior art document, CN118327032A, discloses a retaining and drainage system and its implementation method for slopes with large gullies in high-altitude and cold regions. The system includes a retaining wall assembly installed on the slope. The retaining wall assembly consists of multiple anti-slide piles and inter-pile retaining walls, which are sequentially spaced to form a continuous, unbroken wall structure. Multiple drainage holes penetrating the wall surface and back of the inter-pile retaining walls are also provided. A soil modification zone is formed between the retaining wall assembly and the slope, and this zone is filled from bottom to top with a filter layer and a clay layer. A water-conducting pipe is also pre-embedded within the filter layer. This invention features good soil retention and drainage effect, high drainage efficiency, and the retaining wall is not easily damaged by frost heave, making it particularly suitable for the protection and treatment of slopes with large gullies.

[0004] Although the aforementioned applications possess technical advantages such as good soil retention and drainage, high drainage efficiency, and resistance to frost heave damage, in high-altitude and cold regions, moisture in the soil can freeze during prolonged drainage processes. The transformation of water into ice causes volume expansion, thus exerting additional lateral pressure on the retaining wall. This pressure may lead to slight deformation of the retaining wall, affecting its original geometry and function, and indirectly impacting its blocking effect. Summary of the Invention

[0005] To address the problem of volume expansion caused by freezing when water mixes with soil, as mentioned in the background art, this invention provides a corrugated steel plate retaining wall structure for preventing frost heave in high-altitude frozen soil regions.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a corrugated steel plate retaining wall anti-frost heave structure for high-altitude permafrost regions, comprising a thick gravelly soil layer, a thick lime-soil cushion layer fixedly connected to the bottom of the thick gravelly soil layer, a plurality of lime-soil compaction piles fixedly connected to the bottom of the thick lime-soil cushion layer, the lime-soil compaction piles being arranged in a linear array, a backfill insulation layer fixedly connected to one side of the outer wall of the thick gravelly soil layer, and further comprising a corrugated steel anti-frost heave mechanism, the corrugated steel anti-frost heave mechanism comprising two corrugated steel plates fixedly connected to the top of the thick gravelly soil layer, one side wall of the corrugated steel plate being fixedly connected to the side wall of the backfill insulation layer, a plurality of vertical steel frames fixedly connected between the two corrugated steel plates, a screw fixedly connected between the two vertical steel frames, and an anti-frost heave component provided at the top of the vertical steel frames for promoting water drainage and preventing water from freezing.

[0007] Preferably, the anti-frost heave component includes a concrete cap stone fixedly connected to the top of the vertical steel frame, a rapid flow channel plate fixedly connected to one side of the concrete cap stone, and a water-blocking embankment fixedly connected to the end of the rapid flow channel plate away from the concrete cap stone.

[0008] Preferably, a permeable geotextile is fixedly connected to one side of the bottom of the concrete cap stone, and the outer wall of the permeable geotextile is fixedly connected to the side wall of the vertical steel frame. A thick graded sand and gravel filter layer is fitted and fixedly connected to the inner wall of the permeable geotextile, and multiple transverse blind drains are opened near the bottom of the thick graded sand and gravel layer.

[0009] Preferably, one end of the transverse blind drain penetrates the backfill insulation layer and extends to the outside of the backfill insulation layer, and the bottom end of the thick graded sand and gravel filter layer is connected to a drainage pipe, one end of which penetrates the outer permeable geotextile and extends into the interior of the transverse blind drain.

[0010] Preferably, the inner wall of the thick-graded gravel filter layer is provided with a co-current assembly, which includes a plurality of crossbars penetrating the inner wall of the thick-graded gravel filter layer, and one end of each crossbar is fixedly connected to an inclined bar.

[0011] Preferably, the inclined rod is inclined and the entire inclined rod is set inside the frozen soil. Three fixing sleeves are fixedly connected to the outer wall of one end of the inclined rod, and four locking claw rods are fixedly connected to the outer wall of the fixing sleeve.

[0012] Preferably, a fixing block is fixedly connected to the end of the crossbar away from the diagonal bar, one side wall of the fixing block is fixedly connected to one side of the inner wall of the corrugated steel plate, and a rotating rod is hinged to the side wall of the fixing block away from the crossbar.

[0013] Preferably, a slider is hinged to the end of the rotating rod away from the fixed block, a vertical rod is slidably connected to the inner wall of the slider, and the bottom of the vertical rod is fixedly connected to the top of the screw.

[0014] Preferably, the outer wall of the slider is provided with an auxiliary component, the auxiliary component including an arc-shaped plate fixedly connected to both ends of the slider, and fifteen sliders are provided, with three sliders arranged as a group.

[0015] Preferably, a rhomboid rod is fixedly connected between the two arc-shaped plates, a heat exchange tube is fixedly connected to the side of the arc-shaped plate near the rhomboid rod, an elastic element is fixedly connected to the bottom of the bottom slider, the bottom of the elastic element is fixedly connected to the top of the screw, and five elastic elements are provided.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention employs a corrugated steel anti-frost heave mechanism. A thick-graded gravel filter layer and an outer permeable geotextile are attached to one side of the frozen soil. The thick-graded gravel filter layer then moves the horizontal and diagonal braces, causing the diagonal braces to drive the fixing sleeves and locking claws into the frozen soil. This stabilizes the barrier effect of the thick-graded gravel filter layer, the outer permeable geotextile, the corrugated steel plate, and the vertical steel frame against the frozen soil, effectively preventing structural displacement and collapse, and ensuring the safety of the retaining wall in extreme environments. The corrugated steel plate, as a flexible thin-walled structure, effectively withstands soil pressure and frost heave forces when used for retaining soil in frozen soil areas due to its stress and deformation characteristics. Its corrugated shape not only enhances structural stability but also effectively resists lateral soil pressure. Due to the inclination angle of the diagonal struts, when the soil moisture in the permafrost region decreases, the water gradually accumulates on the outer wall of the struts. The water then slides downwards along the inclined surface of the struts and moves to the outer wall of the permeable geotextile covering. This ensures that the water can quickly move to the surface of the permeable geotextile and, through its permeability, penetrate into the interior of the thick graded gravel filter layer. This prevents water from remaining in the permafrost layer and helps reduce frost heave caused by freezing. Water permeates through the permeable geotextile into the interior of the thick graded gravel filter layer, and the accumulated water enters the drainage pipe through the filter layer. The water then flows through the drainage pipe and the transverse blind ditch, thus discharging outwards, improving overall drainage efficiency, ensuring that rainwater and snowmelt can be quickly discharged, and reducing the impact of the groundwater level on the structure.

[0017] This invention employs a corrugated steel anti-frost heave mechanism. When water slides along the outer wall of the inclined bar to the surface of the outer permeable geotextile and causes frost heave, the resulting compressive force causes the outer permeable geotextile to push the thick graded gravel filter layer against the side wall of the corrugated steel plate. The compressed corrugated steel plate then moves the fixing block, crossbar, inclined bar, fixing sleeve, and locking claw. During the movement of the locking claw, the frozen soil on the outer wall of the inclined bar is broken up, facilitating the continued sliding and accumulation of water along the outer wall of the inclined bar. As the fixed block moves closer to the vertical rod, it causes the rotating rod and slider to slide slightly down the outer wall of the vertical rod. The slider then causes the arc-shaped plate and heat exchange pipe to descend slightly. During the descent of the heat exchange pipe, the area of ​​heat dissipation of the heat exchange pipe moves, thereby heating the frost-suspension soil that is compressed against the outer wall of the permeable geotextile. This causes the water inside the frost-suspension soil to melt, and the melted water flows along the permeable geotextile into the interior of the thick graded gravel filter layer. This causes the heat dissipation area of ​​the heat exchange pipe to move, effectively transferring heat to the compressed frost-suspension soil. This heating process promotes the melting of water inside the frozen soil, reduces the volume expansion of the frozen soil, alleviates the pressure of frost heave on the structure, and allows the water to drain outwards.

[0018] This invention employs a corrugated steel anti-frost heave mechanism. When the slider descends vertically along the outer wall of the vertical rod, the three sliders and six rhomboid rods form a unified vertical descent, ensuring coordinated movement of all parts and preventing localized stress concentration. The sliders pull the rotating rod, fixed block, and deformed areas of the corrugated steel plate towards the vertical rod, maintaining the shape and stability of the corrugated steel plate and preventing deformation or damage caused by freezing fronts. As the slider descends, it presses down on the elastic element, compressing it. Once the moisture in the frost-heave area is drained, the elastic deformation of the elastic element causes the slider to return to its original position and rise, ensuring continuous drainage without interruption by a single downward press, thus facilitating efficient moisture management. Furthermore, moisture continuously slides down and accumulates along the inclined surface of the diagonal rod, optimizing the moisture flow path, reducing moisture retention within the system, ensuring effective drainage, and lowering the probability of frost heave. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall side structure of the present invention; Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the thick gravelly soil layer of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of A in the middle; Figure 5 For the present invention Figure 3Enlarged view of B in the middle; Figure 6 This is a schematic cross-sectional view of the soil-filled insulation layer of the present invention; Figure 7 This is a top view of the vertical steel frame structure of the present invention; Figure 8 This is a schematic diagram of the side structure of the heat exchange tube of the present invention.

[0020] In the diagram: 1. Thick gravelly soil layer; 2. Thick lime-soil cushion layer; 3. Lime-soil compaction pile; 4. Backfill insulation layer; 5. Corrugated steel anti-frost heave mechanism; 51. Corrugated steel plate; 52. Vertical steel frame; 53. Screw rod; 54. Anti-frost heave component; 55. Flow-following component; 56. Auxiliary component; 541. Concrete capstone; 542. Rapid flow channel plate; 543. Water retaining embankment; 544. Permeable geotextile wrapping; 545. Thick graded gravel reverse filter layer; 546. Transverse blind drain; 547. Drainage pipe; 551. Horizontal bar; 552. Diagonal bar; 553. Fixing sleeve; 557. Positioning claw bar; 554. Fixing block; 555. Rotating rod; 556. Sliding block; 558. Vertical bar; 561. Arc plate; 562. Diamond rod; 563. Heat exchange pipe; 564. Elastic component. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figures 1 to 8 As shown, the present invention provides a corrugated steel plate retaining wall anti-frost heave structure for high-altitude frozen soil areas, including a thick gravelly soil layer 1, a thick lime-soil cushion layer 2 fixedly connected to the bottom of the thick gravelly soil layer 1, a plurality of lime-soil compaction piles 3 fixedly connected to the bottom of the thick lime-soil cushion layer 2, the lime-soil compaction piles 3 being arranged in a linear array, a backfill insulation layer 4 fixedly connected to one side of the outer wall of the thick gravelly soil layer 1, and also includes; The corrugated steel anti-frost heave mechanism 5 includes two corrugated steel plates 51 fixedly connected to the top of the thick gravelly soil layer 1. The side wall of one of the corrugated steel plates 51 is fixedly connected to the side wall of the backfill insulation layer 4. Multiple vertical steel frames 52 are fixedly connected between the two corrugated steel plates 51. A screw 53 is fixedly connected between the two vertical steel frames 52. An anti-frost heave component 54 is provided on the top of the vertical steel frame 52 to promote water flow and prevent water from freezing.

[0023] The anti-frost heave component 54 includes a concrete cap stone 541 fixedly connected to the top of the vertical steel frame 52. A rapid flow channel plate 542 is fixedly connected to one side of the concrete cap stone 541, and a water-blocking embankment 543 is fixedly connected to the end of the rapid flow channel plate 542 away from the concrete cap stone 541.

[0024] A permeable geotextile 544 is fixedly connected to one side of the bottom of the concrete cap stone 541. The outer wall of the permeable geotextile 544 is fixedly connected to the side wall of the vertical steel frame 52. A thick graded sand and gravel filter layer 545 is fitted and fixedly connected to the inner wall of the permeable geotextile 544. Multiple transverse blind drains 546 are opened near the bottom of the thick graded sand and gravel soil layer 1.

[0025] The above scheme is adopted: due to the inclination angle of the inclined rod 552, when the moisture in the soil inside the frozen soil area decreases, the moisture will gradually accumulate on the outer wall of the inclined rod 552. The moisture slides down through the inclined surface of the inclined rod 552 and then moves to the outer wall of the outer permeable geotextile 544, ensuring that the moisture can quickly move to the surface of the outer permeable geotextile 544 and penetrate into the interior of the thick graded gravel filter layer 545 through its permeability.

[0026] One end of the transverse blind drain 546 penetrates the soil insulation layer 4 and extends to the outside of the soil insulation layer 4. The bottom end of the thick graded sand and gravel filter layer 545 is connected to a drainage pipe 547. One end of the drainage pipe 547 penetrates the outer permeable geotextile 544 and extends to the inside of the transverse blind drain 546.

[0027] Using the above scheme: the accumulated water enters the interior of the drain pipe 547 through the thick graded gravel filter layer 545, and the water flows through the drain pipe 547 and the interior of the transverse blind ditch 546, thereby being discharged outward.

[0028] The inner wall of the thick graded gravel filter layer 545 is provided with a co-current component 55. The co-current component 55 includes a plurality of crossbars 551 that penetrate the inner wall of the thick graded gravel filter layer 545. One end of the crossbars 551 is fixedly connected to a diagonal bar 552.

[0029] The inclined rod 552 is set at an angle and is set inside the frozen soil. Three fixing sleeves 553 are fixedly connected to the outer wall of one end of the inclined rod 552, and four locking claw rods 557 are fixedly connected to the outer wall of the fixing sleeves 553.

[0030] The above scheme involves attaching a thick-graded gravel filter layer 545 and an outer permeable geotextile 544 to one side of the frozen soil. Then, the thick-graded gravel filter layer 545 moves the horizontal bar 551 and the diagonal bar 552, causing the diagonal bar 552 to drive the fixing sleeve 553 and the locking claw bar 557 to insert into the frozen soil. This stabilizes the blocking effect of the thick-graded gravel filter layer 545, the outer permeable geotextile 544, the corrugated steel plate 51, and the vertical steel frame 52 on the frozen soil.

[0031] A fixing block 554 is fixedly connected to the end of the crossbar 551 away from the diagonal bar 552. One side wall of the fixing block 554 is fixedly connected to one side of the inner wall of the corrugated steel plate 51. A rotating rod 555 is hinged to the side wall of the fixing block 554 away from the crossbar 551.

[0032] A slider 556 is hinged to the end of the rotating rod 555 away from the fixed block 554. A vertical rod 558 is slidably connected to the inner wall of the slider 556. The bottom of the vertical rod 558 is fixedly connected to the top of the screw 53.

[0033] like Figures 1 to 8 As shown, the outer wall of the slider 556 is provided with an auxiliary component 56. The auxiliary component 56 includes an arc plate 561 fixedly connected to both ends of the slider 556. Fifteen sliders 556 are provided, and three sliders 556 are set as a group.

[0034] The above scheme works as follows: when the slider 556 descends, it presses down on the elastic element 564, compressing it. Once the water in the frozen area is fused and drained, the elastic deformation of the elastic element 564 causes the slider 556 to return to its original position and move upward. This ensures the continuous drainage process and prevents it from stopping due to a single downward press, thus helping to manage water efficiently.

[0035] A rhomboid rod 562 is fixedly connected between two arc-shaped plates 561. A heat exchange tube 563 is fixedly connected to the side of the arc-shaped plate 561 near the rhomboid rod 562. An elastic element 564 is fixedly connected to the bottom of the bottom slider 556. The bottom of the elastic element 564 is fixedly connected to the top of the screw 53. Five elastic elements 564 are provided.

[0036] Using the above scheme: when the fixed block 554 moves closer to the vertical rod 558, the fixed block 554 drives the rotating rod 555 and the slider 556 to slide slightly down along the outer wall of the vertical rod 558. The slider 556 drives the arc plate 561 and the heat exchange tube 563 to descend slightly. During the descent of the heat exchange tube 563, the area of ​​the heat exchange tube 563 that dissipates heat will move, thereby heating the frost-susceptible soil that is compressed on the outer wall of the permeable geotextile 544.

[0037] Working principle and usage process of this invention: A thick-graded gravel filter layer 545 and an outer permeable geotextile 544 are attached to one side of the frozen soil. The thick-graded gravel filter layer 545 then moves the horizontal bar 551 and the diagonal bar 552, causing the diagonal bar 552 to drive the fixing sleeve 553 and the locking claw 557 into the frozen soil. This stabilizes the retaining effect of the thick-graded gravel filter layer 545, the outer permeable geotextile 544, the corrugated steel plate 51, and the vertical steel frame 52 on the frozen soil, effectively preventing structural displacement and collapse, and ensuring the safety of the retaining wall in extreme environments. The corrugated steel plate 51, as a flexible thin-walled structure, effectively withstands soil pressure and frost heave when used for retaining soil in frozen soil areas due to its stress and deformation characteristics. Its corrugated shape not only enhances the stability of the structure but also effectively resists lateral soil pressure. Due to the inclination angle of the inclined rod 552, when the soil moisture in the permafrost region decreases, the water gradually accumulates on the outer wall of the inclined rod 552. The water slides downwards through the inclined surface of the inclined rod 552 and then moves to the outer wall of the outer permeable geotextile 544. This ensures that the water can quickly move to the surface of the outer permeable geotextile 544 and permeate into the interior of the thick graded gravel filter layer 545 through its permeability, thereby preventing water from remaining in the permafrost layer and helping to reduce frost heave caused by water freezing. The water permeates into the interior of the thick graded gravel filter layer 545 through the outer permeable geotextile 544, and the accumulated water enters the interior of the drainage pipe 547 through the thick graded gravel filter layer 545. The water flows outward through the drainage pipe 547 and the transverse blind ditch 546, thereby improving the overall drainage efficiency, ensuring that rainwater and snowmelt can be discharged quickly, and reducing the impact of the groundwater level on the structure.

[0038] When water slides along the outer wall of the inclined bar 552 to the surface of the outer permeable geotextile 544 and causes frost heave, the resulting compressive force causes the outer permeable geotextile 544 to drive the thick graded gravel filter layer 545 to compress the side wall of the corrugated steel plate 51. The compressed corrugated steel plate 51 drives the fixing block 554, the crossbar 551, the inclined bar 552, the fixing sleeve 553 and the locking claw rod 557 to move. During the movement of the locking claw rod 557, it can break up the frozen soil on the outer wall of the inclined bar 552, so that water can continue to slide and accumulate along the outer wall of the inclined bar 552. When the fixed block 554 approaches the vertical rod 558, the fixed block 554 drives the rotating rod 555 and the slider 556 to slide slightly down along the outer wall of the vertical rod 558. The slider 556 drives the arc plate 561 and the heat exchange pipe 563 to descend slightly. During the descent of the heat exchange pipe 563, the area of ​​the heat exchange pipe 563 that dissipates heat will move, thereby heating the frost-suspension soil that is compressed against the outer wall of the permeable geotextile 544. This causes the water inside the frost-suspension soil to melt. The melted water will enter the interior of the thick graded gravel filter layer 545 along the permeable geotextile 544, causing the heat dissipation area of ​​the heat exchange pipe 563 to move, thereby effectively transferring heat to the compressed frost-suspension soil. This heating process can promote the melting of water inside the frozen soil, reduce the volume expansion of the frozen soil, alleviate the pressure of frost heave on the structure, and discharge it to the outside.

[0039] As the slider 556 descends vertically along the outer wall of the vertical rod 558, the three sliders 556 and the six rhomboid rods 562 form a unified vertical descent, ensuring coordinated movement of all parts and avoiding localized stress concentration. The slider 556 pulls the deformed areas of the rotating rod 555, the fixed block 554, and the corrugated steel plate 51 closer to the vertical rod 558, maintaining the shape and stability of the corrugated steel plate 51 and preventing deformation or damage caused by freezing fronts. As the slider 556 descends, it presses down on the elastic element 564, compressing it. Once the moisture in the frozen area is fused and drained, the elastic deformation of the elastic element 564 causes the slider 556 to return to its original position and rise, ensuring the continuous drainage process without stopping due to a single downward press, thus contributing to efficient moisture management. Furthermore, the moisture will continuously slide down and accumulate along the inclined surface of the inclined bar 552, which optimizes the flow path of the moisture, reduces the retention of moisture inside the system, ensures that the moisture can be effectively discharged to the outside, and reduces the probability of frost heave.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A corrugated steel plate retaining wall anti-frost heave structure for high-altitude frozen soil areas, comprising a thick gravelly soil layer (1), a thick lime-soil cushion layer (2) fixedly connected to the bottom of the thick gravelly soil layer (1), a plurality of lime-soil compaction piles (3) fixedly connected to the bottom of the thick lime-soil cushion layer (2), the lime-soil compaction piles (3) being arranged in a linear array, and a backfill insulation layer (4) fixedly connected to one side of the outer wall of the thick gravelly soil layer (1), characterized in that: Also includes; The corrugated steel anti-frost heave mechanism (5) includes two corrugated steel plates (51) fixedly connected to the top of the thick gravel layer (1), one of the corrugated steel plates (51) has its side wall fixedly connected to the side wall of the backfill insulation layer (4), a plurality of vertical steel frames (52) are fixedly connected between the two corrugated steel plates (51), and a screw (53) is fixedly connected between the two vertical steel frames (52). The top of the vertical steel frame (52) is provided with an anti-frost heave component (54) to promote water flow and prevent water from freezing.

2. The anti-frost heave structure of corrugated steel plate retaining wall in high-altitude permafrost regions according to claim 1, characterized in that: The anti-frost heave component (54) includes a concrete cap stone (541) fixedly connected to the top of the vertical steel frame (52), a rapid flow channel plate (542) fixedly connected to one side of the concrete cap stone (541), and a water-blocking embankment (543) fixedly connected to the end of the rapid flow channel plate (542) away from the concrete cap stone (541).

3. The anti-frost heave structure of corrugated steel plate retaining wall in high-altitude permafrost regions according to claim 2, characterized in that: The bottom side of the concrete cap stone (541) is fixedly connected to an outer permeable geotextile (544), and the outer wall of the outer permeable geotextile (544) is fixedly connected to the side wall of the vertical steel frame (52). The inner wall of the outer permeable geotextile (544) is fitted with and fixedly connected to a thick graded sand and gravel filter layer (545). The thick graded sand and gravel soil layer (1) is provided with multiple transverse blind drains (546) near the bottom of the outer permeable geotextile (544).

4. The anti-frost heave structure of corrugated steel plate retaining wall in high-altitude permafrost regions according to claim 3, characterized in that: One end of the transverse blind drain (546) penetrates the backfill insulation layer (4) and extends to the outside of the backfill insulation layer (4). The bottom end of the thick graded sand and gravel filter layer (545) is connected to a drainage pipe (547). One end of the drainage pipe (547) penetrates the outer permeable geotextile (544) and extends to the inside of the transverse blind drain (546).

5. The anti-frost heave structure for corrugated steel plate retaining walls in high-altitude permafrost regions according to claim 4, characterized in that: The inner wall of the thick graded sand and gravel filter layer (545) is provided with a co-current component (55), which includes a plurality of crossbars (551) penetrating the inner wall of the thick graded sand and gravel filter layer (545), and one end of the crossbars (551) is fixedly connected to a diagonal bar (552).

6. The anti-frost heave structure for corrugated steel plate retaining walls in high-altitude permafrost regions according to claim 5, characterized in that: The inclined rod (552) is set at an angle and the entire inclined rod (552) is set inside the frozen soil. Three fixing sleeves (553) are fixedly connected to the outer wall of one end of the inclined rod (552), and four locking claw rods (557) are fixedly connected to the outer wall of the fixing sleeve (553).

7. The anti-frost heave structure for corrugated steel plate retaining walls in high-altitude permafrost regions according to claim 6, characterized in that: A fixing block (554) is fixedly connected to one end of the crossbar (551) away from the diagonal bar (552). One side wall of the fixing block (554) is fixedly connected to one side of the inner wall of the corrugated steel plate (51). A rotating rod (555) is hinged to the side wall of the fixing block (554) away from the crossbar (551).

8. The anti-frost heave structure for corrugated steel plate retaining walls in high-altitude permafrost regions according to claim 7, characterized in that: The rotating rod (555) is hinged to a slider (556) at one end away from the fixed block (554). A vertical rod (558) is slidably connected to the inner wall of the slider (556). The bottom of the vertical rod (558) is fixedly connected to the top of the screw (53).

9. The anti-frost heave structure for corrugated steel plate retaining walls in high-altitude permafrost regions according to claim 8, characterized in that: The outer wall of the slider (556) is provided with an auxiliary component (56), the auxiliary component (56) includes an arc plate (561) fixedly connected to both ends of the slider (556), and fifteen sliders (556) are provided, with three sliders (556) arranged as a group.

10. The anti-frost heave structure of corrugated steel plate retaining wall in high-altitude permafrost regions according to claim 9, characterized in that: A rhomboid rod (562) is fixedly connected between the two arc-shaped plates (561). A heat exchange tube (563) is fixedly connected to the side of the arc-shaped plate (561) near the rhomboid rod (562). An elastic element (564) is fixedly connected to the bottom of the slider (556) at the bottom end. The bottom of the elastic element (564) is fixedly connected to the top of the screw (53). Five elastic elements (564) are provided.

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