Frost heaving prevention roadbed blind ditch in alpine frozen soil region
By setting up anti-frost heave blind ditch structures in the roadbed of high-altitude permafrost areas, including permeable insulation layers and stones, the problem of uneven expansion caused by roadbed water freezing was solved, and the stability of road engineering was enhanced.
Patent Information
- Application Number
- CN202423130852.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2034-12-18
AI Technical Summary
Existing technologies for preventing frost heave in high-altitude permafrost regions are limited and fail to effectively address the uneven expansion and frost heave caused by water freezing in the roadbed fill, thus affecting the stability of road engineering projects.
The frost-heave-resistant roadbed blind drain structure includes a compressible waterproof layer, a permeable heat-insulating layer, and stones. This is achieved through the installation of trenches. The permeable heat-insulating layer and stones are designed with a specific technical solution. Geotextile is laid inside the trenches, and longitudinal blind drain pipes are installed within the roadbed. The permeable heat-insulating layer is located on top of the compressible waterproof layer and stones, and the permeable heat-insulating layer and stones are tightly bonded together. The permeable heat-insulating layer and stones are composed of rubble and crushed stone, with the rubble having an inclined angle.
It effectively reduces the impact of frost heave on the roadbed, increases water flow velocity, reduces freezing speed, prevents frost heave, and the permeable insulation layer keeps the freezing depth in the blind ditch shallow, ensuring drainage function and solving the problem of frost heave prevention for roadbeds in high mountain permafrost areas.
Smart Images
Figure CN223753150U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of geotechnical engineering, especially to a blind ditch of anti-frost heaving roadbed in high mountain permafrost region. BACKGROUND
[0002] High-cold mountainous slope permafrost and its roadbed frost heaving: in permafrost time, the volume expansion caused by the water freezing in roadbed filling, due to uneven road construction materials, uneven frost heaving may be caused in different sections, due to the migration of water, may cause the upper roadbed ice or slurry, which seriously affects the road engineering operation stability. It is urgently needed to improve and solve the system research on the mechanism of roadbed soil frost heaving and roadbed disease, and the existing anti-frost heaving measures are often single, and the multi-aspect drainage anti-frost heaving measures are not designed. CONTENT OF THE UTILITY MODEL
[0003] (I) technical problem solved
[0004] In view of the shortage of prior art, the utility model provides a blind ditch of anti-frost heaving roadbed in high mountain permafrost region, which solves the volume expansion caused by the water freezing in roadbed filling, due to uneven road construction materials, uneven frost heaving may be caused in different sections, due to the migration of water, may cause the upper roadbed ice or slurry, which seriously affects the road engineering operation stability. It is urgently needed to improve and solve the system research on the mechanism of roadbed soil frost heaving and roadbed disease, and the existing anti-frost heaving measures are often single, and the multi-aspect drainage anti-frost heaving measures are not designed.
[0005] (II) technical scheme
[0006] In order to achieve the above object, the utility model is realized by the following technical scheme:
[0007] A blind ditch of anti-frost heaving roadbed in high mountain permafrost region, including roadbed, the inside of roadbed includes compressible water-resisting layer, water-permeable heat-insulating layer and stone, the inside of roadbed is provided with groove, the inside of groove is paved with geotextile, longitudinal blind ditch pipe is arranged in roadbed, compressible water-resisting layer is installed on one side of impermeable geotextile, stone is located on one side of compressible water-resisting layer, water-permeable heat-insulating layer is located on the upper layer of compressible water-resisting layer and stone.
[0008] Preferably, the compressible water-resisting layer and the water-permeable heat-insulating layer are tightly attached, and the compressible water-resisting layer and the stone are prefabricated.
[0009] Preferably, the stone is composed of sheet stone and gravel, and the sheet stone has an inclination angle when laid.
[0010] (III) beneficial effects
[0011] The compressible water-resisting layer can effectively reduce the influence of the deformation of the blind ditch caused by the water accumulation and frost heaving on the roadbed, and also can effectively reduce the influence of the frost heaving deformation of the roadbed on the blind ditch; the stone sheet + gravel increases the flow velocity of the water along the water guide direction of the blind ditch when the water in the upper part of the roadbed infiltrates, slows down the water freezing and accumulation, blocks the pore, reduces the water guide property of the blind ditch, and even causes the frost heaving, so that the purpose of preventing the frost heaving is achieved; the water-permeable heat-insulating layer makes the freezing depth of the blind ditch be shallower than the freezing depth of the filling layer on both sides of the blind ditch at the same time, and when the water in the filling layer on both sides of the blind ditch has been completely frozen, the lower part of the blind ditch is ensured not to freeze, and still can drain water, so that the purpose of preventing the frost heaving is achieved, and the problem of preventing the frost heaving of the blind ditch of the roadbed in the high mountain permafrost region is effectively solved. BRIEF DESCRIPTION OF DRAWINGS
[0012] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, and the content of the specification can be implemented, the following will be described in detail with the preferred embodiments of the present application and the accompanying drawings.
[0013] Figure 1 The structure diagram of the road blind ditch of the present application.
[0014] Legend: 1, roadbed; 11, compressible water-resisting layer; 12, water-permeable heat-insulating layer; 13, stone block; 14, longitudinal blind ditch pipe. DETAILED DESCRIPTION
[0015] The application embodiment provides a blind ditch of a roadbed in a high mountain permafrost region, and effectively solves the volume expansion caused by the freezing of water in the roadbed filling, uneven road construction materials, uneven frost heaving in different sections, migration of water, ice accumulation or slurry in the upper roadbed, which seriously affects the operation stability of the road engineering. It is urgent to systematically study how to improve and solve the frost heaving of the roadbed soil and the mechanism of the roadbed disease. The existing frost heaving prevention measures are often single, and a multi-aspect drainage frost heaving prevention measure has not been designed.
[0016] As shown in Figure 1 The technical scheme in the application embodiment effectively solves the volume expansion caused by the freezing of water in the roadbed filling, uneven road construction materials, uneven frost heaving in different sections, migration of water, ice accumulation or slurry in the upper roadbed, which seriously affects the operation stability of the road engineering. It is urgent to systematically study how to improve and solve the frost heaving of the roadbed soil and the mechanism of the roadbed disease. The existing frost heaving prevention measures are often single, and a multi-aspect drainage frost heaving prevention measure has not been designed. The overall idea is as follows:
[0017] The utility model provides a kind of anti-frost heaving roadbed blind ditch in high mountain frozen soil area, including roadbed 1, the inside of roadbed 1 includes compressible water-resisting layer 11, water-permeable heat insulation layer 12 and stone 13, groove is set in the inside of roadbed 1, and geotextile is laid in the inside of groove, longitudinal blind ditch pipe 14 is arranged in roadbed 1, compressible water-resisting layer 11 is installed in impermeable geotextile side, stone 13 is located in the side of compressible water-resisting layer 11, water-permeable heat insulation layer 12 is located in the upper layer of compressible water-resisting layer 11 and stone 13.
[0018] Compressible water-resisting layer 11 and water-permeable heat insulation layer 12 are closely fitted, compressible water-resisting layer 11 and stone 13 are prefabricated, stone 13 is combined by sheet stone and gravel, and sheet stone has an inclination angle when laying.
[0019] Working principle:
[0020] First step, the water infiltration of sheet stone+gravel backfilling has a certain angle of inclination on the upper part of roadbed 1, increases the flow velocity of water flow along the direction of blind ditch water guide, slows down the freezing speed, so as to achieve the purpose of anti-frost heaving, increases the flow velocity of water flow along the direction of blind ditch water guide, slows down the freezing speed, so as to achieve the purpose of anti-frost heaving, water-permeable heat insulation layer 12 is slow due to its heat insulation, and the freezing depth of water in blind ditch is shallower than the freezing depth of surrounding roadbed soil, when water in roadbed 1 soil has frozen, blind ditch can still drain water, so as to achieve the purpose of anti-frost heaving, can realize deformation, temperature insulation and control water infiltration velocity, can effectively prevent frost heaving.
[0021] Second step, according to the structure in the figure, in turn construction preparation, construction lofting, groove excavation, laying geotextile, longitudinal blind ditch pipe, gravel backfilling, pay special attention to the laying of compressible water-resisting layer 11, stone 13 and water-permeable heat insulation layer 12, compressible water-resisting layer 11 and stone 13 must be closely contacted, sheet stone needs a certain angle, cannot be flat, prefabricate multiple compressible water-resisting layer 11 and water-permeable heat insulation layer 12 to facilitate regular replacement.
[0022] Finally, it should be pointed out that: obviously, the above examples are only for clearly illustrating the utility model, and not limited to the implementation mode. For ordinary skilled person in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all implementation modes. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.
Claims
1. A frost heaving prevention roadbed blind drain in a permafrost region of high mountains, comprising a roadbed (1), characterized in that, The interior of the roadbed (1) comprises a compressible water-resisting layer (11), a water-permeable heat-insulating layer (12) and stone blocks (13), the interior of the roadbed (1) is provided with a groove, the interior of the groove is paved with geotextile, the roadbed (1) is provided with longitudinal blind ditch pipes (14), the compressible water-resisting layer (11) is installed on the side of the water-proof geotextile, the stone blocks (13) are located on the side of the compressible water-resisting layer (11), and the water-permeable heat-insulating layer (12) is located on the upper layer of the compressible water-resisting layer (11) and the stone blocks (13).
2. The anti-frost heaving roadbed blind drain in permafrost regions as claimed in claim 1, characterized in that, The compressible water-resisting layer (11) and the water-permeable heat-insulating layer (12) are tightly combined.
3. The anti-frost heaving roadbed blind drain in permafrost regions as claimed in claim 1, characterized in that, The compressible water-resisting layer (11) and the stone blocks (13) are prefabricated.
4. The anti-frost heaving roadbed blind drain in permafrost regions as claimed in claim 1, wherein, The stone blocks (13) are combined by sheet stones and gravel, and the sheet stones have an inclination angle when being paved.