Water-blocking roadbed

Abstract

The utility model provides a water-blocking roadbed. The water-blocking roadbed comprises a base body, a pavement structure, a waterproof structure and a drainage structure, the base body comprises a substrate and a filling part, and the filling part is arranged on the substrate. And the pavement structure is horizontally arranged on the filling part. The waterproof structure comprises an edge covering assembly and an anti-seepage assembly, the edge covering assembly covers the filling part, the anti-seepage assembly is arranged on the side face of the base, and the position, away from the pavement structure, of the edge covering assembly abuts against the anti-seepage assembly. The drainage structure comprises a drainage ditch, and the drainage ditch is arranged on the side face of the base body. According to the water-blocking roadbed provided by the utility model, in cold seasons, the ice content of frozen soil within the range of the roadbed cannot be increased, and the roadbed cannot be damaged by frost heaving; in warm seasons, the roadbed cannot sink due to melting of frozen soil, the overall protection effect is good, and safety is high.

Description

Technical Field

[0001] The utility model relates to the field of preventing and controlling frost damage of permafrost subgrade, and specifically, to a water-blocking subgrade. Background Art

[0002] When building a subgrade in permafrost regions, the permafrost containing a large amount of ice may thaw, causing the collapse of the road cutting slope, uneven settlement of the subgrade base, or the upward migration of water in the subgrade due to seasonal temperature changes of the subgrade, resulting in the accumulation of water under the closed covering layer to produce a covering effect, and further causing engineering diseases such as subgrade frost heave, thaw settlement, pavement cracking, and road mud pumping.

[0003] The purpose of preventing and treating permafrost is to prevent the change of the natural state of permafrost and eliminate the root causes of its hazards, so as to avoid the occurrence of permafrost engineering hazards. So far, the measures for preventing various permafrost diseases based on regulating and controlling the four major factors of heat, water, stress, and soil quality have been relatively perfect.

[0004] In the related art, when building a subgrade in permafrost regions, a hard frozen soil foundation layer containing no or a small amount of unfrozen water is usually selected, and measures for preventing and treating the thawing of permafrost are taken. The common methods include ventilation foundation, elevated foundation, laying a thermal insulation layer, heat piles, and forced circulation refrigeration piles, etc. However, the above methods usually have a high cost, and it is impossible to avoid the continuous increase in the ice content of permafrost in the cold season, and there are still problems such as frost heave damage of the subgrade and settlement of the subgrade caused by melting in the warm season. Summary of the Utility Model

[0005] In order to overcome the defects existing in the related art, the utility model provides a water-blocking subgrade.

[0006] The embodiments of the utility model are implemented as follows:

[0007] A water-blocking subgrade includes a matrix, a pavement structure, a waterproof structure, and a drainage structure. The matrix includes a base and a filling part, and the filling part is arranged on the base. The pavement structure is horizontally arranged on the filling part. The waterproof structure includes a wrapping component and an anti-seepage component. The wrapping component is wrapped on the filling part, and the anti-seepage component is arranged on the side surface of the base. The position of the wrapping component far from the pavement structure abuts against the anti-seepage component. The drainage structure includes a drainage ditch, and the drainage ditch is arranged on the side surface of the matrix to guide and discharge the water flowing down from the matrix.

[0008] In some embodiments, the base is seasonal frozen soil, one side of the seasonal frozen soil is disposed on the upper limit of permafrost, and the filling portion is disposed on the side of the frozen soil away from the upper limit of permafrost. The anti-seepage component includes an anti-seepage wall, and the anti-seepage wall is disposed on the side of the seasonal frozen soil.

[0009] In some embodiments, the anti-seepage wall is made of liquid-solidified soil, and the thickness of the anti-seepage wall is set to L1, satisfying L1≥50 cm.

[0010] In some embodiments, the filling portion includes a connection surface and a covering surface, and the connection surface is disposed on the seasonal frozen soil. The edge component includes edge clay, and the edge clay is disposed to cover the covering surface, and the edge of the edge clay is connected to the anti-seepage wall.

[0011] In some embodiments, the covering surface includes a horizontal portion and an inclined portion, and the inclined portion is disposed between the connection surface and the horizontal portion. The road surface structure is disposed on the horizontal portion.

[0012] In some embodiments, a road shoulder is further disposed on the horizontal portion, and the road shoulder is disposed on the horizontal portion at a position close to the inclined portion. The edge of the road surface structure is connected to the road shoulder.

[0013] In some embodiments, the drainage ditch is disposed at the connection between the edge clay and the anti-seepage wall, and the drainage ditch is located below the inclined portion in the vertical direction.

[0014] In some embodiments, there are two inclined portions, and the two inclined portions are symmetrically disposed on both sides of the horizontal portion. There are two anti-seepage walls, and the two anti-seepage walls are symmetrically disposed on both sides of the seasonal frozen soil.

[0015] In some embodiments, the drainage structure further includes a water retaining component, and the water retaining component is disposed on the base and is located on the side of the drainage ditch away from the filling portion.

[0016] In some embodiments, the water retaining component is set as a water retaining dike, the length of the water retaining dike is the same as the length of the drainage ditch, and the cross section of the water retaining dike is trapezoidal.

[0017] The beneficial effects of the embodiments of the present utility model are:

[0018] The water-blocking subgrade provided by the present utility model is provided with a waterproof component on the side of the base to ensure that the seasonal frozen soil adjacent to the base will not have water seeping into the base. A side-edge component is wrapped outside the filling part to ensure that the external water will not seep into the filling part. Through the cooperation of the waterproof component and the side-edge component, a perfect waterproof structure is formed. In addition, the water flowing down from the base body or the pavement structure will flow into the drainage ditch and be drained by the drainage ditch.

[0019] The water-blocking subgrade provided by the present utility model can form a perfect subgrade water-blocking system through the cooperation of the side-edge component, the waterproof component and the drainage ditch, avoiding the surface water accumulation or rainfall within the route range from seeping into the subgrade. The comprehensive cost is relatively low. In addition, since water will not enter the subgrade range, in the cold season, the ice content of the frozen soil within the subgrade range will not increase, and the subgrade will not be damaged by frost heaving; correspondingly, in the warm season, the subgrade will not subside due to the melting of the frozen soil, and the overall protection effect is good and the safety is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of a perspective view of the water-blocking subgrade of the embodiment of the present utility model.

[0022] ICON:

[0023] 100 - base body; 110 - base; 120 - filling part; 130 - upper limit of permafrost; 200 - pavement structure; 210 - road shoulder; 300 - waterproof structure; 310 - waterproof component; 320 - side-edge component; 321 - horizontal part; 322 - inclined part; 400 - drainage structure; 410 - drainage ditch; 420 - water retaining dam. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Accordingly, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0026] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0027] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is customarily placed during use. 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, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0028] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0029] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0030] This application provides a water-blocking subgrade to solve the problems in the related art, such as the high cost of building subgrades in permafrost regions, the easy frost heave damage of subgrades in cold seasons, and the easy settlement of subgrades in warm seasons.

[0031] Please refer to Figure 1, A water-blocking subgrade, comprising a matrix 100, a pavement structure 200, a waterproof structure 300 and a drainage structure 400. The matrix 100 includes a base 110 and a filling part 120, and the filling part 120 is arranged on the base 110. The pavement structure 200 is horizontally arranged on the filling part 120. The waterproof structure 300 includes a side-wrap component 320 and an anti-seepage component 310. The side-wrap component 320 is arranged to wrap the filling part 120, and the anti-seepage component 310 is arranged on the side of the base 110. The position of the side-wrap component 320 far from the pavement structure 200 abuts against the anti-seepage component 310. The drainage structure 400 includes a drainage ditch 410, and the drainage ditch 410 is arranged on the side of the matrix 100 to guide and discharge the water flowing down from the matrix 100.

[0032] Specifically, for the subgrade of this embodiment, after construction is completed, the anti-seepage component 310 is arranged on the side of the base 110, the filling part 120 is arranged on the base 110, and the side-wrap component 320 wraps the filling part 120. In this way, the frozen soil in the adjacent position near the base 110 or the moisture in other structures is blocked by the anti-seepage component 310 and will not enter the base 110. After the external precipitation or the water source in other positions falls on the filling part 120, it will flow down along the side-wrap component 320 and flow into the drainage ditch 410, and is drained by the drainage ditch 410. Through the anti-seepage component 310, the side-wrap component 320 and the drainage structure 400, a perfect water-blocking system is formed to protect the whole matrix 100 and prevent external moisture from entering the range of the matrix 100.

[0033] Since external moisture will not enter the range of the matrix 100, when building a subgrade in permafrost areas, the site is itself selected on a hard frozen soil foundation layer that contains no or a small amount of unfrozen water. That is to say, in the cold season, the ice content of the frozen soil at the matrix 100 will not increase, and the matrix 100 will not be frost heave damaged due to the increase in ice content. In the warm season, the matrix 100 will not subside due to the melting of the frozen soil. The pavement structure 200 is arranged on the filling part 120, and the whole matrix 100 can remain stable in both the cold season and the warm season, that is, the pavement structure 200 can remain stable and will not be damaged by the seasons.

[0034] In addition, for the water-blocking subgrade of this embodiment, during implementation, only the anti-seepage component 310 needs to be arranged at the base 110, the side-wrap component 320 needs to be arranged at the filling part 120, and the drainage structure 400 needs to be arranged at a suitable position. Compared with the related technologies that adopt methods such as ventilation foundation, elevated foundation, laying thermal insulation layer, heat piles and forced circulation refrigeration piles, the comprehensive water-blocking effect is better, the protection ability for the subgrade is stronger, and the comprehensive cost is lower.

[0035] In some embodiments, for example, Figure 1As shown, the base 110 is seasonal frozen soil. One side of the seasonal frozen soil is disposed on the upper limit 130 of permafrost, and the filling part 120 is disposed on the side of the frozen soil away from the upper limit 130 of permafrost. The anti-seepage component 310 includes an anti-seepage wall which is disposed on the side of the seasonal frozen soil. By providing the anti-seepage wall, it is possible to effectively prevent water from seeping into the seasonal frozen soil, that is, the base 110, from the side, reducing the frost heaving and thaw settlement phenomena that may be caused by water, prolonging the service life of the roadbed, and improving the stability of the roadbed. In addition, by disposing one side of the seasonal frozen soil on the upper limit 130 of permafrost, the cold source effect of the permafrost can be utilized to maintain the low temperature state of the seasonal frozen soil, further improving the stability of the base 110.

[0036] In some embodiments, by way of example, the anti-seepage wall is made of liquid-solidified soil, and the thickness of the anti-seepage wall is set to L1, satisfying L1≥50 cm.

[0037] Liquid Soil Stabilization (LSS) is a material formed by mixing chemical additives with soil, which can be transformed into a solid material with certain strength and stability during the curing process. Before curing, the liquid-solidified soil has good fluidity, which is convenient for construction and shaping; after curing, it has high strength and can withstand large loads. Using liquid-solidified soil as the material of the anti-seepage wall can ensure the convenience of construction and the reliability after construction. Moreover, various curing agents can be added to the liquid-solidified soil according to different soil characteristics and anti-seepage requirements during use to adapt to different construction conditions. The liquid-solidified soil can also directly use local soil as raw materials, reducing the demand for purchased materials, and reducing transportation costs and environmental pollution.

[0038] The anti-seepage wall is made of liquid-solidified soil and has good compactness and anti-seepage performance. The thickness is set to at least 50 cm to ensure that the anti-seepage wall can effectively block water seepage and reduce the impact of water on the roadbed. Secondly, the thicker anti-seepage wall can also provide better support to assist in maintaining the structural stability of the roadbed. Even if a small amount of water enters the matrix 100, the anti-seepage wall can reduce the deformation or damage of the roadbed caused by water seepage. Moreover, in permafrost regions, the thicker anti-seepage wall can better resist the influence of temperature changes on the roadbed, such as freeze-thaw cycles in permafrost regions, thereby further improving the stability of this embodiment.

[0039] In some embodiments, by way of example, such as Figure 1As shown, the filling part 120 includes a connecting surface and a covering surface, and the connecting surface is arranged on the seasonal frozen soil. The edge wrapping component 320 includes edge wrapping clay, and the edge wrapping clay is arranged to cover the covering surface, and the edge of the edge wrapping clay is connected to the impervious wall. By wrapping the covering surface of the filling part 120 with the edge wrapping clay and connecting its edge to the impervious wall, it can effectively prevent moisture from seeping into the roadbed from the side, protect the base 110 and the filling part 120 as a whole, and improve the impervious performance and the stability of the overall structure.

[0040] In permafrost regions, the edge wrapping clay can also prevent external moisture such as rainfall from directly contacting the filling part 120, prevent moisture from seeping under the roadbed, reduce the risk of frost heaving or thaw settlement, and prevent the matrix 100 from being damaged, thereby driving the pavement structure 200 to be damaged.

[0041] In some embodiments, by way of example, the edge wrapping clay arranged to cover the outside of the filling part 120 should have a thickness of at least 30 cm to ensure the waterproof effect and water isolation ability of the edge wrapping clay and prevent slope water from entering the matrix 100. In addition, the edge wrapping clay can also restrict the filling part 120 to ensure the stability of the overall structure of the filling part 120.

[0042] In some embodiments, by way of example, as Figure 1 shown, the covering surface includes a horizontal part 321 and an inclined part 322, and the inclined part 322 is arranged between the connecting surface and the horizontal part 321. The pavement structure 200 is arranged on the horizontal part 321. By arranging the inclined part 322, it can effectively guide the rainfall falling on the pavement structure 200 or the inclined part 322 to drain to both sides and fall into the drainage ditch 410 and drain outwards, enhancing the effect of the drainage structure 400. The inclined part 322 can also effectively shorten the contact time between the moisture and the pavement structure 200 and the edge wrapping clay, thereby improving the impervious performance.

[0043] The pavement structure 200 is arranged on the horizontal part 321 to ensure the flatness of the whole pavement structure 200. Laying the pavement structure 200 on a horizontal plane can also ensure a simple construction process and improve the construction efficiency.

[0044] In some embodiments, by way of example, as Figure 1As shown, a road shoulder 210 is further provided on the horizontal portion 321. The road shoulder 210 is provided on the horizontal portion 321 near the inclined portion 322. The edge of the road surface structure 200 is connected to the road shoulder 210. By providing the road shoulder 210, the stability of the roadbed edge can be increased, the risk of damage to the roadbed edge caused by vehicle driving can be reduced, and the maintenance cost caused by the damage to the edge of the road surface structure 200 can also be reduced. The connection between the road shoulder 210 and the edge of the road surface structure 200 can form a continuous anti-seepage barrier, guiding the accumulated water and rainfall on the road surface structure 200 to drain to both sides, reducing the chance of water infiltrating into the interior of the matrix 100, thereby improving the anti-seepage performance. In addition, the road shoulder 210 can also increase the overall structural strength of the roadbed, reduce the deformation of the roadbed caused by uneven loading, and improve the stability of this embodiment.

[0045] In some embodiments, by way of example, such as Figure 1 As shown, a drainage ditch 410 is provided at the connection between the wrapped clay and the anti-seepage wall, and the drainage ditch 410 is located below the inclined portion 322 in the vertical direction. By providing the drainage ditch 410 at the connection between the wrapped clay and the anti-seepage wall and below the inclined portion 322, the water on the road surface structure 200 and the inclined portion 322 will flow along the inclined portion 322 into the drainage ditch 410 under the action of gravity and be discharged to a suitable position along the drainage ditch 410, reducing the chance of water infiltrating into the roadbed interior, thereby reducing the risk of frost heaving or thaw settlement of the frozen soil and improving the stability of the roadbed.

[0046] In addition, the drainage ditch 410 can also effectively prevent external water from flowing into the range of the matrix 100. During the process of external water approaching the matrix 100, it will directly fall into the drainage ditch 410 and be discharged to a suitable position along the drainage ditch 410 without coming into contact with the matrix 100.

[0047] In some embodiments, by way of example, such as Figure 1 As shown, there are two inclined portions 322, and the two inclined portions 322 are symmetrically arranged on both sides of the horizontal portion 321. There are two anti-seepage walls, and the two anti-seepage walls are symmetrically arranged on both sides of the seasonal frozen soil.

[0048] By setting two symmetrical inclined portions 322, it is ensured that surface water and rainwater are evenly discharged from both sides of the roadbed, reducing the possibility of water accumulation in the middle of the roadbed and improving the drainage efficiency. The symmetrically arranged impervious walls can provide more uniform support for the roadbed, contributing to improving the overall stability of the roadbed. Wrap-around clay is provided on both inclined portions 322. The symmetrically arranged impervious walls and inclined portions 322 can cooperate with each other to form an effective anti-seepage barrier, reducing water penetration and avoiding the accumulation of water inside the matrix 100, maintaining the stability of the matrix 100, and reducing the risk of frost heaving or thaw settlement. Correspondingly, avoiding water penetration and frozen soil thawing can also reduce the maintenance frequency of the roadbed, extend the service life of the roadbed, and reduce the maintenance cost. Moreover, the symmetrically arranged design can improve the stability and load-bearing capacity of the matrix 100, thereby improving the supporting effect of the matrix 100 on the road surface structure 200 and ensuring the driving safety on the road surface structure 200.

[0049] In some embodiments, by way of example, such as Figure 1 As shown, the drainage structure 400 further includes a water retaining component. The water retaining component is arranged on the base 110 and is located on the side of the drainage ditch 410 away from the filling portion 120. The water retaining component can block the external water from approaching the range of the matrix 100 and isolate the water collection outside the range of the matrix 100. The combination of the water retaining component and the drainage ditch 410 can form a more reliable anti-seepage barrier, reducing the chance of water penetrating into the roadbed interior.

[0050] In some embodiments, by way of example, such as Figure 1 As shown, the water retaining component is arranged as a water retaining embankment 420. The length of the water retaining embankment 420 is the same as the length of the drainage ditch 410, and the cross-section of the water retaining embankment 420 is trapezoidal. Through the water retaining embankment 420, the water outside the range of the matrix 100 is comprehensively blocked, preventing the external water from flowing into the drainage ditch 410 and affecting the normal drainage of the drainage ditch 410. Importantly, it prevents the external water from contacting the matrix 100 and affecting the anti-seepage and waterproof effects of the matrix 100. The trapezoidal cross-section of the water retaining embankment 420 can ensure the water blocking effect of the water retaining embankment 420.

[0051] The present application also provides a construction method for the water-blocking type roadbed. Specifically, when constructing the water-blocking type roadbed in any of the above embodiments, the steps are as follows:

[0052] S10: Roadbed construction. The construction process is: measurement and layout, surface cleaning before filling, compaction of the base 110, layered filling. Layered leveling, layered compaction, until the top surface is compacted and formed.

[0053] S20: Construction of premixed fluidized solidified soil. The construction process is: construction preparation, base cleaning, excavation of the side trench, mixing of solidified soil, transportation of solidified soil, pouring of solidified soil, curing, acceptance.

[0054] Among them, the solidified soil mixture must be prepared according to the proportion of the sample soil to control the mix ratio. The mixture should be stirred by special mixing machinery, and the stirring time shall not be less than 2 minutes, and the mixture shall be stirred evenly with workability and fluidity meeting the requirements. The time from the start of solidified soil mixing to the completion of pouring shall not exceed 3 hours; the solidified soil shall be poured in layers and blocks by a boom pump truck or a chute, and the pouring height difference shall not be greater than 1.0 m, and the first pouring height shall be 0.5 m; during pouring, in case of heavy rain or continuous light rain, the surface of the unhardened filling surface shall be covered.

[0055] The solidified soil can be prepared with different mix ratios and curing agents according to different requirements and soil properties. The curing agent mainly consists of calcium oxide, activated alumina and silica. Generally, according to the characteristics of the mixed soil and engineering requirements, combined with on-site materials, the principle of environmental protection and economic cost is achieved. Its technical route is: composite mineral design + chemical activation. The basic composition is: 75% - 90% of industrial waste residues rich in activated alumina and silica (such as slag, steel slag, fly ash, etc.), 1% - 5% of surface modifiers (to improve the surface activity and charge status of soil particles), 5% - 10% of activity activators to promote the hydration reaction of minerals. The admixture content of the curing agent in the solidified soil mixture should be 7% - 25%. The conventional mix ratio is as follows: strength ≥ 0.8 MPa: (curing agent 226 kg, soil 1190 kg, water 350 kg). The water used for mixing the solidified soil should comply with the regulations on the water used for reinforced concrete in the current industry standard JGJ63—2019 "Standard for Concrete Water".

[0056] S30: Construction of clay edging. The construction process is: measurement and layout, cleaning of the lower layer, pre-rolling before filling, excavation of slope steps, soil spreading, leveling, rolling, and slope trimming. In order to ensure the effective combination of the edging soil and the subgrade filler and the construction quality of the transverse joint, steps need to be excavated on the slope before the construction of each layer of edging soil. The width of the steps shall not be less than 60 cm. Due to the narrow construction operation surface, a bulldozer can be used for longitudinal pushing and local manual cooperation to shovel the slope into a stepped shape. Before filling, the steps shall be rolled and compacted by a roller or a rammer.

[0057] S40: Construction of drainage ditch 410, measurement and layout, trench excavation, treatment of the base 110, installation of precast components, sidewall backfilling and joint sealing treatment.

[0058] S50: Construction of water retaining dam 420. When the waste soil is sun-dried during the trench excavation, it can be used as the construction material for the water retaining dam 420. When it does not meet the requirements of retaining and preventing seepage, it shall be constructed with clay.

[0059] Specific requirements involved in the detailed construction procedures of the above steps, such as paving thickness, compaction degree, inspection indicators, dimensions of the drainage ditch 410, width and slope of the water retaining dam, etc., can be respectively referred to the "Technical Specification for Highway Subgrade Construction", "Technical Specification for Highway Design and Construction in Permafrost Regions", and "Highway Drainage Design Specification" for implementation.

[0060] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A water-blocking roadbed, used in permafrost areas, characterized in that: include: A substrate (100), the substrate (100) comprising a base (110) and a filling portion (120), the filling portion (120) being arranged on the base (110); A pavement structure (200), wherein the pavement structure (200) is horizontally arranged on the filling portion (120); A waterproof structure (300), the waterproof structure (300) comprising an edge-wrapping component (320) and an anti-seepage component (310), the edge-wrapping component (320) being arranged to cover the filling portion (120), the anti-seepage component (310) being arranged on the side of the base (110), and a position of the edge-wrapping component (320) away from the pavement structure (200) being in contact with the anti-seepage component (310); A drainage structure (400) includes a drainage ditch (410) which is arranged on the side of the base (100) to guide and drain water flowing down from the base (100).

2. The water-blocking roadbed according to claim 1, characterized in that: The base (110) is seasonal frozen soil, one side of the seasonal frozen soil is arranged on the upper limit (130) of permafrost soil, and the filling part (120) is arranged on the side of the frozen soil away from the upper limit (130) of permafrost soil; The anti-seepage component (310) comprises an anti-seepage wall, and the anti-seepage wall is arranged on the side of the seasonal frozen soil.

3. The water-blocking roadbed according to claim 2, characterized in that: The anti-seepage wall is made of liquid solidified soil, and the thickness of the anti-seepage wall is set to L1, satisfying L1≥50cm.

4. The water-blocking roadbed according to claim 2, characterized in that: The filling portion (120) comprises a connecting surface and a covering surface, and the connecting surface is arranged on the seasonal frozen soil; The edge-wrapping component (320) comprises edge-wrapping clay, the edge-wrapping clay is arranged to cover the covering surface, and the edge of the edge-wrapping clay is connected to the anti-seepage wall.

5. The water-blocking roadbed according to claim 4, characterized in that: The covering surface comprises a horizontal portion (321) and an inclined portion (322), and the inclined portion (322) is arranged between the connecting surface and the horizontal portion (321); The pavement structure (200) is disposed on the horizontal portion (321).

6. The water-blocking roadbed according to claim 5, characterized in that: The horizontal portion (321) is also provided with a shoulder (210), and the shoulder (210) is provided at a position on the horizontal portion (321) close to the inclined portion (322); The edge of the pavement structure (200) is connected to the road shoulder (210).

7. The water-blocking roadbed according to claim 5, characterized in that: The drainage ditch (410) is arranged at the connection between the edge-wrapping clay and the anti-seepage wall, and the drainage ditch (410) is located below the inclined portion (322) in the vertical direction.

8. The water-blocking roadbed according to claim 6, characterized in that: Two inclined portions (322) are provided, and the two inclined portions (322) are symmetrically arranged on both sides of the horizontal portion (321); There are two anti-seepage walls, and the two anti-seepage walls are symmetrically arranged on both sides of the seasonal frozen soil.

9. The water-blocking roadbed according to claim 1, characterized in that: The drainage structure (400) further comprises a water retaining assembly, wherein the water retaining assembly is arranged on the base (110), and the water retaining assembly is located on a side of the drainage ditch (410) away from the filling portion (120).

10. The water-blocking roadbed according to claim 9, characterized in that: The water retaining assembly is configured as a water retaining dam (420), the length of the water retaining dam (420) is the same as the length of the drainage ditch (410), and the cross-section of the water retaining dam (420) is configured as a trapezoid.

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