Overhead pile plate ventilation roadbed

Abstract

The utility model relates to the technical field of road engineering, and particularly discloses an overhead pile plate ventilation roadbed, which comprises a long-life pavement, a roadbed filling layer, a raft, piles and a drainage ditch, the long-life pavement is paved on the roadbed filling layer, a geogrid is arranged in the roadbed filling layer to increase the crack resistance, the roadbed filling layer is positioned on the raft, and the piles are arranged on the piles. An overhead layer exists between the raft and the ground, a ventilation area is formed between the roadbed area and a frozen soil layer, the raft is connected with the pile columns, the pile columns provide bearing force for the roadbed structure, the pile foundation ends in the pile columns are in a threaded shape and can be conveniently inserted below the upper limit of frozen soil, and the overhead pile plate ventilation roadbed is adjusted and cooled through the raft and the overhead ventilation area of the ground. The overhead layer is provided with a baffle which can control the ventilation area to be opened and closed in winter and in summer, cold energy accumulation is achieved, and the drainage area is arranged on one side of the roadbed, so that water is prevented from permeating into subgrade frozen soil.

Description

Technical Field

[0001] This utility model relates to the field of road engineering technology, and specifically discloses an overhead pile-slab ventilated roadbed. Background Technology

[0002] Permafrost is a special type of soil that shares common characteristics with other soils, but possesses unique properties due to the presence of ice. When the temperature of permafrost is above -1.0℃, it is called high-temperature permafrost. The mechanical properties of high-temperature permafrost largely depend on its temperature and water content. Even small fluctuations in temperature can cause significant changes in its mechanical properties. Furthermore, the freezing depth of high-temperature permafrost is lower than that of other types of permafrost.

[0003] Global warming is causing temperatures to rise in permafrost regions, leading to the thawing and refreezing of some permafrost to form hot permafrost. Furthermore, seasonal changes can affect the water content and heat conductivity of permafrost, thus influencing its formation. As temperatures rise, hot permafrost also impacts some highway engineering projects. Its high temperature sensitivity and deformation capacity make roadbeds prone to damage during freeze-thaw cycles. Simultaneously, as temperatures rise, permafrost begins to thaw, shrinking in volume and causing roadbed subsidence. Conversely, when temperatures drop, the permafrost refreezes, expanding in volume and potentially lifting the roadbed. This repeated freeze-thaw cycle gradually damages roadbed materials, reducing stability. The thawing of hot permafrost also causes significant roadbed deformation. Because permafrost contains a large amount of ice, when temperatures rise, the ice melts into water, softening the roadbed material and reducing its load-bearing capacity. This deformation not only affects road smoothness but may also threaten driving safety. In addition, the thawing of permafrost reduces the stability of roadbed slopes, increasing the risk of landslides and other geological disasters. Utility Model Content

[0004] In view of the technical problems existing in the background art, the purpose of this utility model is to provide an overhead pile plate ventilated roadbed that can cool the frozen soil roadbed according to different seasons.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A ventilated roadbed with piles and slabs is characterized by comprising a roadbed area and a drainage area located above the frozen soil layer; the drainage area is located on the side of the roadbed area and parallel to it; the roadbed area includes piles that penetrate the frozen soil layer and are embedded therein, with pile ends at the lower end of each pile, the pile ends being located within the frozen soil layer, and the surface of the pile ends having external threads that are in contact with the frozen soil layer; a common crossbeam is installed at the upper end of several piles arranged laterally, and a raft slab is laid on the upper end of the crossbeams; the piles are inserted into the frozen soil layer, forming a ventilation area between the raft slab and the frozen soil layer.

[0007] A roadbed fill layer is provided above the raft foundation, with the roadbed fill layer having two sloping sides. A long-life pavement is laid on top of the roadbed fill layer, and curbs are laid along both sides of the long-life pavement. The curbs are hollow structures with drainage holes penetrating their surfaces. Guardrails are fixedly installed at the upper ends of the curbs. A drainage channel is provided along one side of the roadbed fill layer slope, close to the drainage area. The upper ends of the drainage channels are located below the drainage holes and are interconnected. The drainage area includes a drainage ditch embedded in the surface of the frozen soil layer. The lower end of the drainage ditch has a concave shape, and the interior of the concave shape is filled with a dense layer. A seepage blind ditch is provided inside the dense layer, and a channel is provided above the drainage ditch.

[0008] Preferably, the longitudinal partitions of the grille are respectively provided with an upper grille loosening mechanism and a lower grille anti-loosening mechanism.

[0009] Preferably, the upper anti-loosening mechanism of the grille includes an upper bracket, a column, a corner hook, a canopy, and side columns. The upper bracket is covered by the grille partition, and the lower end of the column is welded to the surface of the upper bracket. The upper end of the column is fixed with a canopy. Side columns are fixed to the side of the column. The side columns are symmetrically distributed along the surface of the column, and corner hooks are welded to the ends of the side columns.

[0010] Preferably, the lower layer anti-loosening mechanism of the grating includes a lower bracket, a support rod, a support cylinder, a cylinder end, a barb, a threaded groove, and a nut.

[0011] Preferably, the lower card seat is partitioned and covered by the grid, the upper end of the support rod is welded to the surface of the lower card seat, the surface of the support rod is slidably sleeved with the support cylinder, and a cylinder end is provided at the end of the support cylinder.

[0012] Preferably, the outer ring wall of the support cylinder has several barbs, a nut is inserted through the support cylinder near the end face, the surface of the support cylinder has an internal hole for the nut, and the surface of the support rod has several threaded grooves along the vertical position, with the nut and the threaded grooves threadedly connected to each other.

[0013] This utility model has the following advantages and beneficial effects:

[0014] In this utility model, 1. the roadbed area is elevated to form a ventilation area between the raft and the frozen soil layer, which cools the roadbed. The frozen soil is treated with inserted piles with threads added to the pile heads. The piles are designed as drilling and pushing structures that rotate into the frozen soil layer, which can improve the stability of the pile advancement and avoid the situation of the pile breaking due to hard insertion. At the same time, the rotational insertion will not damage the original frozen soil layer and can be perfectly inserted to the required depth.

[0015] 2. As described in point 1, adding a grid structure to the subgrade fill layer laid above the raft foundation can effectively ensure the bottom of the fill layer is stable and prevent loosening. At the same time, in order to ensure the stability of the relationship between the grid and the fill layer, two layers of anti-loosening mechanisms are added to the grid. The lower anti-loosening mechanism can ensure the grid and the fill below are protected against detachment and loosening, while the upper anti-loosening mechanism can ensure the compactness and stability between the large amount of subgrade fill layer above and the grid. They complement each other and improve the safety of the entire subgrade raised area. Attached Figure Description

[0016] Figure 1 This is an overall schematic diagram of the embodiment;

[0017] Figure 2 The roadbed area and drainage area are distributed as shown in the embodiment;

[0018] Figure 3 This is a schematic diagram of the front distribution of the fill layer and the geogrid in an embodiment;

[0019] Figure 4 This is an enlarged schematic diagram of point A in the embodiment;

[0020] Figure 5 This is a schematic diagram of the grille structure in an embodiment;

[0021] Figure 6 This is a partial schematic diagram of the anti-loosening mechanism in an embodiment;

[0022] Figure 7 This is an enlarged schematic diagram of point B in the embodiment.

[0023] Icons: 1-Frozen soil layer, 2-Subgrade area, 3-Drainage area, 20-Pile column, 21-Pile end, 22-Crossbeam, 23-Raft foundation, 24-Subgrade fill layer, 25-Long-life pavement, 251-Cutting edge, 252-Drainage hole, 253-Guardrail, 26-Drainage channel, 27-Grate, 271-Upper layer anti-loosening mechanism of grating, 272-Lower layer anti-loosening mechanism of grating, 2710-Upper bracket, 2711-Angle hook, 2712-Post, 2713-Canopy, 2714-Side column, 2720-Lower bracket, 2721-Support rod, 2722-Support cylinder, 2723-Cylinder end, 2724-Barb, 2725-Threaded groove, 2726-Nut, 30-Drainage ditch, 31-Compacted layer, 32-Seepage blind ditch, 33-Ditch, 4-Baffle. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] Example

[0027] like Figures 1 to 7 As shown, the overhead pile-slab ventilated roadbed includes a roadbed area 2 and a drainage area 3 located above the frozen soil layer 1. The drainage area 3 is located on the side of the roadbed area 2 and is parallel to the roadbed area 2.

[0028] The roadbed area 2 includes piles 20, which penetrate the frozen soil layer 1 and are embedded therein. Several piles 20 are arranged in a rectangular array. The lower end of each pile 20 is provided with a pile end 21, which is located inside the frozen soil layer 1. The surface of the pile end 21 is provided with external threads, which are in close contact with the frozen soil layer 1. The upper ends of the several piles 20 arranged laterally are connected to the same crossbeam 22. A raft slab 23 is laid on the upper end of the several crossbeams 22. The piles 20 are inserted into the frozen soil layer 1. There is an air gap between the raft slab 23 and the ground, which forms a ventilation area between the roadbed area 2 and the frozen soil layer 1. A baffle 4 is detachably installed in the ventilation area. The baffle 4 is inserted into the frozen soil layer 1 and can close the ventilation area.

[0029] A roadbed fill layer 24 is provided above the raft slab 23. The roadbed fill layer 24 is in the form of two sloping sides. A long-life pavement 25 is laid on top of the roadbed fill layer 24. The long-life pavement 25 is filled with functional materials to improve its resistance to ultraviolet aging, increase its low-temperature toughness, and extend its life. The long-life pavement 25 is provided with curbs 251 on both sides. The curbs 251 are hollow structures. Drainage holes 252 are opened on the surface of the curbs 251 and penetrate into them. A guardrail 253 is fixedly installed at the upper end of the curbs 251.

[0030] A drainage channel 26 is provided on one side slope of the roadbed fill layer 24. The drainage channel 26 is close to the drainage area 3. The upper end of the drainage channel 26 is located below the drainage hole 252 and is connected to each other.

[0031] The interior of the roadbed fill layer 24 is filled with a geogrid 27, which is a geogrid and is filled with steel bars. The geogrid increases the crack resistance of the fill.

[0032] The longitudinal partitions of the grille 27 are respectively provided with an upper anti-loosening mechanism 271 and a lower anti-loosening mechanism 272. Both the upper anti-loosening mechanism 271 and the lower anti-loosening mechanism 272 are arranged in a rectangular array.

[0033] The upper anti-loosening mechanism 271 of the grille includes an upper bracket 2710, a column 2712, a corner hook 2711, a canopy 2713, and a side column 2714. The upper bracket 2710 is partitioned and covered by the grille 27 and is fixedly installed by screws on both sides. The lower end of the column 2712 is welded to the surface of the upper bracket 2710. The upper end of the column 2712 is fixed with a canopy 2713, which has an umbrella-shaped structure. The side column 2714 is fixed to the side of the column 2712. The side columns 2714 are symmetrically distributed along the surface of the column 2712. The end of the side column 2714 is welded and fixed with a corner hook 2711, which is an acute-angled arrowhead shape.

[0034] The lower layer anti-loosening mechanism 272 of the grille includes a lower retaining seat 2720, a support rod 2721, a support cylinder 2722, a cylinder end 2723, a barb 2724, a threaded groove 2725, and a nut 2726. The lower retaining seat 2720 is partitioned and covered by the grille 27 and is fixedly installed by screws on both sides. The upper end of the support rod 2721 is welded to the surface of the lower retaining seat 2720, and the surface of the support rod 2721 is slidably sleeved with the support cylinder 2722. Both the support rod 2721 and the support cylinder 2722 are cylindrical structures, and a cylinder end 2723 is provided at the end of the support cylinder 2722. Furthermore, the end of the cylinder 2723 is a conical structure, and several barbs 2724 are distributed on the outer ring wall of the support cylinder 2722. The barbs 2724 are divided into four layers, and four are distributed in each layer. The barbs 2724 in each layer are evenly distributed along the outer wall surface of the support cylinder 2722. A nut 2726 is inserted through the support cylinder 2722 near the end face. The surface of the support cylinder 2722 has an internal hole for the nut 2726. Several threaded grooves 2725 are opened on the surface of the support rod 2721 in a vertical position. The nut 2726 is threadedly connected to any one of the threaded grooves 2725.

[0035] Drainage area 3 includes drainage ditch 30, which is embedded in the surface of the frozen soil layer 1. The lower end of drainage ditch 30 is recessed, and the interior of the recess is filled with a compacted layer 31, which is made of sand and gravel. A seepage blind ditch 32 is provided inside the compacted layer 31, which is made of PVC material and has several seepage micropores on its surface. A ditch 33 is provided above drainage ditch 30.

[0036] In practice

[0037] In the construction of the roadbed area 2, a threaded surface is added to the pile end 21 of the pile 20, so that when the pile 20 is inserted into the frozen soil layer 1, it does not need to be inserted in the traditional hard insertion method. Instead, it can be directly inserted by rotation and deeply buried in the frozen soil layer 1. The pile 20 is distributed in a rectangular array to achieve multi-point installation. A crossbeam 22 is added to the upper end of multiple piles 20 in the same row, so that the crossbeam 22 can serve as the load-bearing structure of the raft slab 23. At the same time, the multi-point distributed piles 20 can evenly distribute the pressure on the raft slab 23 and the pressure above it, ensuring the service life of the piles 20.

[0038] After the raft foundation 23 is installed, a suspended layer structure is formed between the raft foundation 23 and the frozen soil layer. A portion of the fill soil is first backfilled onto the raft foundation 23 as a buffer zone. Then, the geogrid 27 is laid on the leveled subgrade fill layer 24 to increase the load-bearing capacity, overall strength, and stability of the fill soil. Before laying the geogrid 27, the lower layer anti-loosening mechanism 272 of the geogrid 27 is placed below the partitions of the geogrid 27 and covered by the lower bracket 2720. With the help of screws or bolts, it can be secured. The lower layer anti-loosening mechanism 272 of the grid is installed and fixed with the grid 27. The cylinder end 2723 at the lower end of the support cylinder 2722 can be better inserted into the roadbed fill layer 24. With the structure of the hook 2724, the grid 27 is prevented from separating from the lower roadbed fill layer 24. Through the extension and retraction of the support rod 2721 and the support cylinder 2722, the lower layer anti-loosening mechanism 272 of the grid can be appropriately extended according to the depth of the roadbed fill layer 24 to ensure the stable connection between the grid 27 and the lower roadbed fill layer 24.

[0039] Then, in the same manner, the upper anti-loosening mechanism 271 of the grid is pre-fixed to the partition of the grid 27 and distributed vertically and vertically with the lower anti-loosening mechanism 272 of the grid. After the array distribution of the upper anti-loosening mechanism 271 of the grid is completed, the upper subgrade fill layer 24 is backfilled, and then the long-life pavement 25 is laid. The curbs 251 are laid on both sides of the long-life pavement 25. The curbs 251 are designed as hollow structures, and drainage holes 252 are opened on both sides of the hollow structure to facilitate drainage of surface water. Drainage channels 26 corresponding to the drainage holes 252 are set on one side of the slope of the subgrade fill layer 24. It can guide drainage, and finally, the water is discharged into the drainage ditch 30 in the drainage area 3. In summer, due to the rise in temperature, the frozen soil layer 1 is easy to melt. The baffle 4 is connected to the ventilation area, so that the baffle 4 closes the ventilation area, which maximizes the effect of the frozen soil layer insulation. In winter, when the temperature drops, the baffle 4 is removed, and the long-life road surface 25 and the frozen soil layer 1 are separated. The airflow passes through the long-life road surface 25 and the frozen soil layer 1, which lowers the temperature of the frozen soil layer 1, realizes the accumulation of cold energy, and increases the bearing capacity of the foundation. In winter, the freezing force and frozen soil strength of the frozen soil layer 1 increase, which can improve the bearing capacity of the pile column 20.

[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A ventilated roadbed with overhead piles and slabs, characterized in that: It includes a roadbed area (2) and a drainage area (3) set above the frozen soil layer (1); the drainage area (3) is set on the side of the roadbed area (2) and is set parallel to the roadbed area (2); The roadbed area (2) includes piles (20), the lower end of the piles (20) is provided with pile ends (21), the pile ends (21) are located in the frozen soil layer (1), the surface of the pile ends (21) is provided with external threads, and the external threads are fitted to the frozen soil layer (1). The upper ends of several piles (20) arranged in the transverse direction are all installed with the same crossbeam (22), and the upper ends of several crossbeams (22) are covered with rafts (23). The piles (20) are inserted into the frozen soil layer (1), forming a ventilation area between the rafts (23) and the frozen soil layer (1). A baffle (4) is detachably provided in the ventilation area. A roadbed fill layer (24) is provided above the raft slab (23). The roadbed fill layer (24) is in the form of two sloping sides. A long-life pavement (25) is laid above the roadbed fill layer (24). The long-life pavement (25) is provided with curbs (251) on both sides. A drainage channel (26) is provided on one side slope of the roadbed fill layer (24). The drainage channel (26) is close to the drainage area (3). The upper end of the drainage channel (26) is located below the drainage hole (252) and is connected to each other. The interior of the roadbed fill layer (24) is filled with a grid (27); The drainage area (3) includes a drainage ditch (30), which is embedded in the soil surface of the frozen soil layer (1). The lower end of the drainage ditch (30) is recessed, and the interior of the recess is filled with a dense layer (31). A seepage blind ditch (32) is provided inside the dense layer (31), and a ditch (33) is provided above the drainage ditch (30).

2. The ventilated roadbed with overhead piles and slabs according to claim 1, characterized in that: The longitudinal partitions of the grille (27) are respectively provided with an upper anti-loosening mechanism (271) and a lower anti-loosening mechanism (272).

3. The ventilated roadbed with overhead piles and slabs according to claim 2, characterized in that: The upper anti-loosening mechanism (271) of the grille includes an upper bracket (2710), a column (2712), a corner hook (2711), a canopy (2713), and a side column (2714). The upper bracket (2710) is separated from the grille (27) by a partition covering the lower end of the column (2712) which is welded to the surface of the upper bracket (2710). The upper end of the column (2712) is fixed with a canopy (2713). The side column (2714) is fixed to the side of the column (2712). The side columns (2714) are symmetrically distributed along the surface of the column (2712). The end of the side column (2714) is welded with a corner hook (2711).

4. The ventilated roadbed with overhead piles and slabs according to claim 3, characterized in that: The lower layer anti-loosening mechanism (272) of the grid includes a lower bracket (2720), a support rod (2721), a support cylinder (2722), a cylinder end (2723), a barb (2724), a threaded groove (2725), and a nut (2726).

5. The ventilated roadbed with overhead piles and slabs according to claim 4, characterized in that: The lower card seat (2720) is partitioned and covered by the grid (27). The upper end of the support rod (2721) is welded to the surface of the lower card seat (2720). The surface of the support rod (2721) is slidably sleeved with the support cylinder (2722). A cylinder end (2723) is provided at the end of the support cylinder (2722).

6. The ventilated roadbed with overhead piles and slabs according to claim 5, characterized in that: The outer ring wall of the support cylinder (2722) has several barbs (2724) distributed thereon. A nut (2726) is inserted through the support cylinder (2722) near the end face. The surface of the support cylinder (2722) has an internal hole for the nut (2726). The surface of the support rod (2721) has several threaded grooves (2725) in a vertical position. The nut (2726) and the threaded grooves (2725) are threaded together.

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