Structural cushion layer for relieving thaw collapse of roadbed in permafrost region

Abstract

The utility model discloses a structural cushion layer for relieving thaw collapse of a roadbed in a permafrost region, which belongs to the technical field of permafrost region roadbed stabilization, and comprises a foam concrete plate, the bottom of the foam concrete plate is connected with a plastic plate, a thermal insulation plate is embedded in the plastic plate, a thermal insulation layer and a thermal insulation layer are respectively embedded in the thermal insulation plate, and the thermal insulation layer is connected with the foam concrete plate. The heat preservation layer and the heat insulation layer are arranged up and down, and geogrids are arranged at the top of the foam concrete plate and the bottom of the plastic plate and arranged in a # shape. According to the utility model, the foam concrete plate is arranged, the foam concrete plate has higher compressive strength and can meet the compressive strength requirement of a roadbed and a pavement, in addition, a large number of closed fine air holes are formed in the foam concrete plate, the foam concrete plate has good cold insulation and heat insulation effects, and the polyurethane foam plastic plate can effectively prevent ground radiation from being transmitted into the foundation; and the internal cooling capacity is kept, so that the influence of road gene collapse on use is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of roadbed stabilization technology in permafrost regions, and particularly relates to a structural cushion layer for reducing roadbed thaw settlement in permafrost regions. Background Technology

[0002] In physical geography, permafrost refers to an environment where trees cannot grow due to low temperatures and a short growing season. In geology, permafrost refers to various rocks and soils with temperatures below 0°C and containing ice. Based on the length of time they are frozen, permafrost can be divided into the following categories: short-term permafrost, seasonal permafrost, and perennial permafrost.

[0003] In permafrost regions, if a thick layer of underground ice exists in the soil, the thermal balance of the permafrost may be disrupted by natural or human activities. During the melting of the underground ice, the soil may slide along the freeze-thaw interface under the action of gravity, leading to the subsidence of the roadbed. Utility Model Content

[0004] The purpose of this utility model is to propose a structural cushion layer for mitigating roadbed settlement caused by the melting of permafrost in permafrost regions, in order to solve the problem of roadbed settlement caused by the melting of permafrost.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a structural cushion layer for reducing roadbed thaw settlement in permafrost areas, comprising a foamed concrete board, a plastic board connected to the bottom of the foamed concrete board, an insulation board embedded in the plastic board, and a heat insulation layer and a heat insulation layer embedded in the insulation board respectively.

[0006] As a further description of the above technical solution:

[0007] The insulation layer is located on the upper part of the insulation board, and the insulation layer has multiple air holes.

[0008] As a further description of the above technical solution:

[0009] The insulation layer is located at the bottom of the insulation board, and a triangular support plate is provided inside the insulation board.

[0010] As a further description of the above technical solution:

[0011] Geogrids are provided on the top of the foamed concrete slab and the bottom of the plastic slab, and the geogrids are arranged in a grid pattern.

[0012] As a further description of the above technical solution:

[0013] The plastic plate has a plug-in block and a plug-in groove on opposite sides. The inner wall of the plug-in groove has an internal groove on both sides. A snap-fit ​​block is slidably connected in the internal groove. Multiple springs are connected to the bottom of the snap-fit ​​block. The bottom of the springs is connected to the bottom of the snap-fit ​​block.

[0014] As a further description of the above technical solution:

[0015] Both sides of the plug block are provided with snap-fit ​​grooves, and one side of the snap-fit ​​block is provided with a pressing bevel.

[0016] As a further description of the above technical solution:

[0017] The bottom of the snap-fit ​​block has multiple fixing slots, and a fixing rod is slidably connected in the fixing slot. The bottom of the fixing rod is connected to the bottom of the built-in slot, and a spring is sleeved on the outside of the fixing rod.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0019] 1. In this utility model, by setting up foam concrete boards, the foam concrete boards have high compressive strength, which can meet the compressive strength requirements of the roadbed and pavement. In addition, they contain a large number of closed tiny pores, which have good cold insulation and heat insulation effects. Furthermore, the polyurethane foam boards can effectively prevent ground radiation from entering the foundation and maintain internal coldness, thereby avoiding the roadbed from being affected by collapse.

[0020] 2. In this utility model, by setting a plug-in block, the plug-in block is inserted into the plug-in groove on one side of the adjacent plastic board, so that one side of the plug-in block squeezes the snap-fit ​​block, causing it to move downward and squeeze the spring, so that the spring generates a rebound force. When the plug-in block is inserted into place, the spring rebound causes the snap-fit ​​block to be inserted into the snap-fit ​​groove for fixation, thereby fixing the two plastic boards together and avoiding displacement between the foam concrete boards, which would reduce the support effect. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a structural cushion layer for mitigating thaw settlement of roadbeds in permafrost regions, as proposed in this utility model.

[0022] Figure 2 This is a schematic diagram of the plug-in block structure of a structural cushion layer for reducing thaw settlement of roadbeds in permafrost regions, as proposed in this utility model.

[0023] Figure 3 This is a schematic cross-sectional view of a heat insulation board for a structural cushion layer used to reduce thaw settlement of roadbeds in permafrost regions, as proposed in this utility model.

[0024] Legend: 1. Foamed concrete board; 2. Geogrid; 3. Plastic board; 4. Insertion groove; 5. Insertion block; 6. Snap-fit ​​groove; 7. Snap-fit ​​block; 8. Fixing rod; 9. Spring; 10. Internal groove; 11. Insulation board; 12. Insulation layer; 13. Insulation layer. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1 - Figure 3 This utility model provides a technical solution: a structural cushion layer for reducing roadbed thaw settlement in permafrost areas, comprising a foamed concrete board 1, a plastic board 3 connected to the bottom of the foamed concrete board 1, an insulation board 11 embedded in the plastic board 3, an insulation layer 12 and an insulation layer 13 embedded in the insulation board 11, the insulation layer 12 being located on the upper part of the insulation board 11 and having multiple air holes, the insulation layer 13 being located on the lower part of the insulation board 11 and having a triangular support plate inside the insulation board 11, and geogrids 2 being provided on the top of the foamed concrete board 1 and the bottom of the plastic board 3, and the geogrids 2 being arranged in a grid pattern.

[0027] In a specific implementation, the compressive strength of the foamed concrete board 1 can reach 25MPa, which meets the compressive strength requirements of the roadbed and pavement, thus ensuring the stability of the roadbed. In addition, it contains a large number of closed fine pores and has a thermal conductivity between 0.06 and 0.3w / mk, which has a good cold insulation and heat insulation effect. Furthermore, the polyurethane foam board 3 can effectively prevent ground radiation from entering the foundation and retain internal cold. By setting the insulation layer 12 and the insulation board 11 to be hollow, the heat insulation performance of the plastic board 3 is further improved. By setting the geogrid 2, the geogrid 2 can effectively increase the tensile strength of the board and improve the overall integrity of the roadbed under load.

[0028] The plastic plate 3 has a plug-in block 5 and a plug-in groove 4 on opposite sides. The inner wall of the plug-in groove 4 has an inner groove 10 on both sides. A snap-fit ​​block 7 is slidably connected in the inner groove 10. Multiple springs 9 are connected to the bottom of the snap-fit ​​block 7. The bottom of the springs 9 is connected to the bottom of the snap-fit ​​block 7. The plug-in block 5 has a snap-fit ​​groove 6 on both sides. The snap-fit ​​block 7 has a pressing slope on one side. Multiple fixing grooves are opened at the bottom of the snap-fit ​​block 7. A fixing rod 8 is slidably connected in the fixing groove. The bottom of the fixing rod 8 is connected to the bottom of the inner groove 10. The spring 9 is sleeved on the outside of the fixing rod 8.

[0029] In a specific implementation, by setting up a plug-in block 5, the plug-in block 5 is inserted into the plug-in groove 4 on one side of the adjacent plastic board 3, so that one side of the plug-in block 5 presses against the snap-fit ​​block 7, causing the snap-fit ​​block 7 to move downward and press against the spring 9, so that the spring 9 generates a rebound force. The spring 9 is supported by a fixing rod 8 to prevent the spring 9 from bending during compression and affecting the rebound effect. Then, when the plug-in block 5 is inserted into place, the rebound of the spring 9 causes the snap-fit ​​block 7 to be inserted into the snap-fit ​​groove 6 for fixation, so that the two plastic boards 3 are fixed together, thereby preventing displacement between the foam concrete boards 1 and the resulting decrease in the support effect.

[0030] Working principle: In use, the plug block 5 on one side of the plastic board 3 is inserted into the plug slot 4 on the other side of the plastic board 3. At the same time, the snap-fit ​​block 7 is squeezed, causing the snap-fit ​​block 7 to move downward and squeeze the spring 9, so that the spring 9 generates a rebound force. Then, when the two foam concrete boards 1 are attached to each other, the snap-fit ​​block 7 is inserted into the snap-fit ​​slot 6 by the rebound of the spring 9, thereby fixing the plug block 5 with the snap-fit ​​block 7. This prevents misalignment between the two adjacent foam concrete boards 1, which would reduce the support effect. Then, the foam concrete board 1 and the plastic board 3 provide support to prevent the roadbed from settling after the frozen soil thaws.

[0031] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A structural cushion layer for mitigating thaw settlement of roadbeds in permafrost regions, comprising foamed concrete slabs (1), characterized in that, The bottom of the foamed concrete board (1) is connected to a plastic board (3), and the plastic board (3) is embedded with a heat insulation board (11). The heat insulation board (11) is embedded with a heat insulation layer (12) and a heat insulation layer (13).

2. A structural cushion layer for mitigating thaw settlement of roadbeds in permafrost regions according to claim 1, characterized in that, The insulation layer (12) is located on the upper part of the insulation board (11), and the insulation layer (12) has multiple air holes.

3. A structural cushion layer for mitigating thaw settlement of roadbeds in permafrost regions according to claim 1, characterized in that, The insulation layer (13) is located at the lower part of the insulation board (11), and a triangular support plate is provided inside the insulation board (11).

4. A structural cushion layer for mitigating thaw settlement of roadbeds in permafrost regions according to claim 1, characterized in that, The top of the foamed concrete board (1) and the bottom of the plastic board (3) are both provided with geogrids (2), and the geogrids (2) are arranged in a grid pattern.

5. A structural cushion layer for mitigating thaw settlement of roadbeds in permafrost regions according to claim 1, characterized in that, The plastic plate (3) has a plug-in block (5) and a plug-in groove (4) on opposite sides. The plug-in groove (4) has an inner groove (10) on both sides of its inner wall. A snap-fit ​​block (7) is slidably connected in the inner groove (10). Multiple springs (9) are connected to the bottom of the snap-fit ​​block (7). The bottom of the springs (9) is connected to the bottom of the snap-fit ​​block (7).

6. A structural cushion layer for mitigating thaw settlement of roadbeds in permafrost regions according to claim 5, characterized in that, Both sides of the plug-in block (5) are provided with snap-fit ​​grooves (6), and one side of the snap-fit ​​block (7) is provided with a pressing slope.

7. A structural cushion layer for mitigating thaw settlement of roadbeds in permafrost regions according to claim 5, characterized in that, The bottom of the snap-fit ​​block (7) is provided with multiple fixing grooves, and a fixing rod (8) is slidably connected in the fixing groove. The bottom of the fixing rod (8) is connected to the bottom of the built-in groove (10), and the spring (9) is sleeved on the outside of the fixing rod (8).

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