Slope protection structure for expressway in permafrost region
By setting up a multi-layered protective structure on the highway slope in the permafrost region, including a crushed stone layer, a wire mesh layer, an insulation layer, and a vegetation protection layer, the problems of frost heave and thaw settlement were solved, achieving both slope stability and aesthetics, and ensuring the smooth progress of the project.
Patent Information
- Application Number
- CN202511391122.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-26
- Publication Date
- 2025-11-25
AI Technical Summary
When constructing highway slopes in permafrost regions, it is necessary to address the issues of frost heave and thaw settlement to ensure the stability and safety of the slopes, especially the impact of permafrost thawing on engineering structures under climate warming conditions.
A multi-layered protective structure is adopted, including a first crushed stone layer, a wire mesh layer, a second crushed stone layer, a mortar-grouted layer, a coarse sand layer, an insulation layer, a clay layer, and a vegetation protection layer. Combined with a concrete frame and L-shaped pipes, it forms an effective heat dissipation and protection mechanism to prevent heat from entering the interior of the slope.
It effectively prevents the thermal melting of the slope, ensuring the stability and aesthetics of the slope, while providing a basis for plant growth and improving the safety and aesthetics of the project.
Smart Images
Figure CN121006801A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of slope protection structure technology, specifically to a slope protection structure for highways in permafrost regions. Background Technology
[0002] Permafrost refers to various rocks and soils that are below zero degrees Celsius and contain ice. It can generally be divided into short-term permafrost (a few hours / a few days to half a month), seasonal permafrost (half a month to several months), and perennial permafrost (also known as permanent permafrost, which refers to soil layers that remain frozen for two or more years).
[0003] Permafrost exhibits rheological properties, and its long-term strength is far lower than its instantaneous strength. Due to these characteristics, constructing engineering structures in permafrost regions presents two major risks: frost heave and thaw settlement. With climate warming, permafrost is continuously degrading.
[0004] In recent years, with the rapid development of my country's economic construction, infrastructure projects such as railways, highways, mining, and urban development have been widely carried out in the permafrost regions of the Qinghai-Tibet Plateau. These projects encounter issues related to the stability of building and structure foundations and environmental problems during construction. To ensure the safety and stability of highway slopes in permafrost regions, it is necessary to study the protective structures for highway slopes in these areas. Summary of the Invention
[0005] (I) Technical problems to be solved
[0006] The technical problem to be solved by the present invention is to overcome the above difficulties and provide a slope protection structure for highways in permafrost areas that can effectively prevent the occurrence of thermal thawing on slopes in permafrost areas and ensure the smooth progress of the project.
[0007] (II) Technical Solution
[0008] To solve the above-mentioned technical problems, the technical solution provided by the present invention is: a slope protection structure for highways in permafrost areas, comprising a slope body, wherein the slope body is provided with a first crushed stone layer, a metal wire mesh layer, a second crushed stone layer, a mortar-grouted slab layer, a coarse sand layer, a thermal insulation layer, a clay layer and a plant protection layer in sequence.
[0009] The metal wire mesh layer is provided with a concrete frame that can limit and fix the second crushed stone layer, the mortar-grouted slab layer, the coarse sand layer, the insulation layer, the clay layer and the plant protection layer.
[0010] The second crushed stone layer is uniformly provided with several L-shaped pipes that penetrate the masonry layer, coarse sand layer, insulation layer, clay layer and plant protection layer and connect with the outside.
[0011] As an improvement, the thickness of the first crushed stone layer is 20-30 cm;
[0012] The second gravel layer is 10-20 cm thick;
[0013] The thickness of the mortar-grouted sheet layer is 4-6 cm;
[0014] The thickness of the coarse sand layer is 2-3 cm.
[0015] The thickness of the clay layer is 5-6 cm.
[0016] The thickness of the plant protective layer is 10-15 cm.
[0017] As an improvement, the first crushed stone layer uses crushed stone with a particle size of 3CM-8CM, and the second crushed stone layer uses crushed stone with a particle size of 2CM-4CM.
[0018] As an improvement, the metal wire mesh layer is galvanized iron wire mesh.
[0019] As an improvement, the insulation layer is made of polypropylene.
[0020] As an improvement, the concrete frame is a series of inverted U-shaped frames connected in sequence, and the inverted U-shaped frames are provided with a number of crossbars evenly arranged inside.
[0021] As an improvement, a roadbed is provided on the side of the slope body near the top, a paving layer is provided on top of the roadbed, and a curb stone is provided between the slope body and the roadbed to block the paving layer.
[0022] As an improvement, the opening of the L-shaped tube faces downwards.
[0023] As an improvement, a barrier net is provided at the opening of the L-shaped tube.
[0024] (III) Beneficial Effects
[0025] With the above structure, the present invention has the following advantages:
[0026] 1. The metal wire mesh layer and the mortar-grouted sheet layer work together to fix the first and second crushed stone layers, and the heat in the slope body can move upwards and flow freely into the first and second crushed stone layers.
[0027] 2. The L-shaped pipe can conduct heat from the first and second gravel layers to the outside. The downward opening of the L-shaped pipe can prevent rain and snow from entering the slope body through the opening of the L-shaped pipe. The barrier net can prevent birds from entering and blocking the L-shaped pipe.
[0028] 3. The coarse sand layer and clay layer can protect the insulation layer, which can isolate the slope body from the outside world and prevent external heat from entering the slope body.
[0029] 4. The clay layer and plant protection layer can provide a foundation for plant growth, making the slope itself more aesthetically pleasing. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of a slope protection structure for highways in permafrost regions according to the present invention.
[0031] Figure 2 This is a structural schematic diagram of a concrete frame for highway slope protection in frozen soil areas according to the present invention.
[0032] As shown in the figure: 1. Slope body, 2. First crushed stone layer, 3. Wire mesh layer, 4. Second crushed stone layer, 5. Masonry layer, 6. Coarse sand layer, 7. Insulation layer, 8. Clay layer, 9. Plant protection layer, 10. Concrete frame, 11. L-shaped pipe, 12. Inverted U-shaped frame, 13. Crossbar, 14. Roadbed, 15. Pavement layer, 16. Curbstone, 17. Barrier net. Detailed Implementation
[0033] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.
[0034] Example 1
[0035] Combined with appendix Figure 1-2 A slope protection structure for highways in permafrost areas includes a slope body 1, on which a first crushed stone layer 2, a metal wire mesh layer 3, a second crushed stone layer 4, a mortar-grouted slab layer 5, a coarse sand layer 6, an insulation layer 7, a clay layer 8, and a plant protection layer 9 are sequentially arranged.
[0036] The metal wire mesh layer 3 is provided with a concrete frame 10 that can limit and fix the second crushed stone layer 4, the mortar-grouted slab layer 5, the coarse sand layer 6, the insulation layer 7, the clay layer 8, and the plant protection layer 9, so as to prevent the second crushed stone layer 4, the mortar-grouted slab layer 5, the coarse sand layer 6, the insulation layer 7, the clay layer 8, and the plant protection layer 9 from shifting due to frost heave and thaw settlement.
[0037] The second crushed stone layer 4 is uniformly provided with several L-shaped pipes 11 that penetrate the masonry layer 5, coarse sand layer 6, insulation layer 7, clay layer 8 and plant protection layer 9 and communicate with the outside. The L-shaped pipes 11 can conduct heat out of the first crushed stone layer 2 and the second crushed stone layer 4.
[0038] The clay layer 8 and the plant protection layer 9 work together to allow for the planting of greenery, making the slope more aesthetically pleasing.
[0039] The thickness of the first gravel layer 2 is 20-30 cm;
[0040] The second gravel layer 4 has a thickness of 10-20 cm;
[0041] The thickness of the mortar-grouted sheet layer 5 is 4-6 cm;
[0042] The thickness of the coarse sand layer 6 is 2-3 cm.
[0043] The thickness of the clay layer 8 is 5-6 cm.
[0044] The thickness of the plant protective layer 9 is 10CM-15CM.
[0045] The first crushed stone layer 2 is made of crushed stone with a particle size of 3CM-8CM, and the second crushed stone layer 4 is made of crushed stone with a particle size of 2CM-4CM.
[0046] The metal wire mesh layer 3 is a galvanized iron wire mesh, which can limit and fix the first gravel layer 2 and the second gravel layer 4.
[0047] The insulation layer 7 is made of polypropylene and can separate the inside and outside of the slope body 1 to prevent external heat from entering the slope body 1.
[0048] The concrete frame 10 consists of several inverted U-shaped frames 12 connected in sequence, and each inverted U-shaped frame 12 has several horizontal bars 13 evenly arranged inside.
[0049] The slope body 1 has a roadbed 14 on the side near the top, and a pavement layer 15 is provided on the top of the roadbed 14. A curb stone 16 is provided between the slope body 1 and the roadbed 14 to block the pavement layer 15.
[0050] The L-shaped pipe 11 has its opening facing downwards, which can prevent rain and snow from entering the gravel layer through the L-shaped pipe 11.
[0051] The opening of the L-shaped pipe 11 is provided with a barrier net 17 to prevent birds from entering the gravel layer.
[0052] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, alterations, deletions of some features, additions of features, or recombinations of features to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the innovative principles of the present invention shall still fall within the scope of the technical solutions of the present invention.
Claims
1. A slope protection structure for highways in permafrost regions, comprising a slope body, characterized in that: The slope body is provided with a first crushed stone layer, a wire mesh layer, a second crushed stone layer, a mortar-grouted slab layer, a coarse sand layer, an insulation layer, a clay layer, and a vegetation protection layer in sequence. The metal wire mesh layer is provided with a concrete frame that can limit and fix the second crushed stone layer, the mortar-grouted slab layer, the coarse sand layer, the insulation layer, the clay layer and the plant protection layer. The second crushed stone layer is uniformly provided with several L-shaped pipes that penetrate the masonry layer, coarse sand layer, insulation layer, clay layer and plant protection layer and connect with the outside.
2. The slope protection structure for highways in permafrost regions according to claim 1, characterized in that: The thickness of the first gravel layer is 20-30 cm; The second gravel layer is 10-20 cm thick; The thickness of the mortar-grouted sheet layer is 4-6 cm; The thickness of the coarse sand layer is 2-3 cm. The thickness of the clay layer is 5-6 cm. The thickness of the plant protective layer is 10-15 cm.
3. The slope protection structure for highways in permafrost regions according to claim 1, characterized in that: The first crushed stone layer uses crushed stone with a particle size of 3CM-8CM, and the second crushed stone layer uses crushed stone with a particle size of 2CM-4CM.
4. The slope protection structure for highways in permafrost regions according to claim 1, characterized in that: The metal wire mesh layer is galvanized iron wire mesh.
5. A slope protection structure for highways in permafrost regions according to claim 1, characterized in that: The insulation layer is made of polypropylene.
6. A slope protection structure for highways in permafrost regions according to claim 1, characterized in that: The concrete frame consists of several inverted U-shaped frames connected in sequence, and each inverted U-shaped frame has several horizontal bars evenly arranged inside.
7. A slope protection structure for highways in permafrost regions according to claim 1, characterized in that: A roadbed is provided on the side of the slope body near the top, and a paving layer is provided on top of the roadbed. A curb stone is provided between the slope body and the roadbed to prevent the paving layer from being blocked.
8. A slope protection structure for highways in permafrost regions according to claim 1, characterized in that: The opening of the L-shaped tube faces downwards.
9. A slope protection structure for highways in permafrost regions according to claim 1, characterized in that: The opening of the L-shaped tube is equipped with a barrier net.