Flashstone ventilation roadbed and construction method

Abstract

The invention relates to the technical field of roadbed and permafrost protection, in particular to a rubble ventilation roadbed and a construction method.The roadbed comprises a plurality of vertical ventilation pipes, first side slope frames arranged in pairs, a first rubble roadbed body, a partition layer, second side slope frames arranged in pairs and a second rubble layer; the multiple ventilation pipes are arranged in a staggered mode, and the first slope frame and the second slope frame are arranged in a staggered mode. The ventilation pipe is a square pipe, a top end air pipe is arranged in the middle of the upper end of the ventilation pipe and is a square pipe, a pipe opening of the top end air pipe is smaller than a pipe opening of the ventilation pipe, the two opposite side walls of the top end air pipe are flush with the two opposite side walls of the ventilation pipe, the other two opposite side walls of the top end air pipe and the other two side walls of the ventilation pipe are arranged at intervals, and a plurality of ventilation holes are formed in the side walls of the top end air pipe. An inclined plate is connected between the top end air pipe and the ventilation pipe, and the inclined plate is inclined downwards from the outer wall of the top end air pipe to the outer wall of the ventilation pipe, so that the effects of improving the thermal stability of the roadbed in the permafrost region and reducing the risk of frozen soil melting and roadbed settlement are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of roadbed and permafrost protection, and in particular to a slab-stone ventilated roadbed and a construction method. Background Art

[0002] Plateau permafrost refers to various rocks and soils below zero degrees Celsius and containing ice. It can generally be divided into short-term permafrost, seasonal permafrost and permafrost. The area of ​​permafrost, seasonal permafrost and short-term permafrost on the earth accounts for about 50% of the land area, of which permafrost accounts for 25% of the land area. Permafrost is a soil medium that is extremely sensitive to temperature and contains abundant underground ice. Therefore, permafrost has rheological properties and long-term strength that is far lower than instantaneous strength.

[0003] With the rapid development of my country's economic construction, the mileage of highway construction is getting longer and longer. In the process of highway construction in plateau permafrost areas, due to the high ice content in permafrost areas, especially in areas with extremely unstable high temperatures, the thermal stability of permafrost is poor, and the frost heave and thaw settlement are strong. The geological conditions are extremely complex. Once the foundation undergoes freeze-thaw changes, the stability of the roadbed will be reduced and the risk of permafrost melting and roadbed settlement will be increased, eventually leading to changes in the foundation volume, thereby damaging the roadbed and pavement. Summary of the invention

[0004] In order to improve the thermal stability of the roadbed in permafrost areas and reduce the risks of frozen soil melting and roadbed settlement, the present application provides a rubble ventilated roadbed and a construction method.

[0005] The above technical objectives of this application are achieved through the following technical solutions: On the one hand, the present application provides a slab stone ventilated roadbed, comprising a plurality of ventilation pipes vertically inserted into a frozen soil layer, a pair of first side slope frames arranged along the length direction of a highway and spaced apart on both sides of the length direction of the highway, a first slab stone roadbed laid on the frozen soil layer and wrapped around the first side slope frames, a barrier layer laid on the first slab stone roadbed, a pair of second side slope frames arranged along the length direction of the highway and on both sides of the length direction of the highway, and a second slab stone layer laid on the barrier layer and wrapped around the second side slope frames; Multiple ventilation pipes are staggered along the length of the highway, and the first side slope frame and the second side slope frame are staggered up and down; The ventilation duct is a square tube, and a top air duct is arranged in the middle of the upper end of the ventilation duct. The top air duct is a square tube and the pipe opening is smaller than the pipe opening of the ventilation duct. The two opposite side walls of the top air duct are flush with the two opposite side walls of the ventilation duct, and the other two opposite side walls of the top air duct are spaced from the other two side walls of the ventilation duct. A plurality of ventilation holes are opened on the side walls of the top air duct, and an inclined plate is connected between the top air duct and the ventilation duct, and the inclined plate is inclined downward from the outer wall of the top air duct to the outer wall of the ventilation duct.

[0006] By adopting the above technical scheme, multiple ventilation ducts are inclined along the length direction of the highway and relatively staggered in an arrangement which is more reasonable, which can not only maintain the ventilation effect of the top air duct, but also will not cause adverse effects on the overall structure of the roadbed. When the wind outside the roadbed blows into the slab roadbed through the slope, and enters the top air duct through the inclined plate and the ventilation hole, since the pipe opening of the top air duct is smaller than the pipe opening of the ventilation pipe, the wind can quickly bring the air at the upper end of the ventilation pipe out of the top air duct after passing through the top air duct, thereby accelerating the flow speed of the air in the ventilation duct and improving the efficiency of the ventilation pipe in controlling the temperature in the frozen soil layer. The first slope frame and the second slope frame arranged in an upper and lower offset manner can reinforce the roadbed slope and significantly improve the structural strength of the roadbed slope. The rubble roadbed can change the shape of the roadbed surface and the heat transfer mechanism to reasonably adjust the temperature state of the permafrost layer, and can effectively prevent external heat from penetrating into the permafrost layer in the warm season. The vertical and obliquely offset ventilation pipes can quickly transfer the heat inside the permafrost layer to the rubble roadbed, and the wind passing through the rubble roadbed can bring the heat out to the outside of the rubble roadbed, thereby achieving the purpose of improving the thermal stability of the roadbed in permafrost areas and reducing the risk of frozen soil melting and roadbed settlement.

[0007] Optionally, the lower ends of the two opposite side walls of the ventilation pipe are fixedly connected with first supporting grooves.

[0008] By adopting the above technical solution, the first support groove can increase the horizontal contact area between the ventilation pipe and the permafrost layer, ensuring that the vertically arranged ventilation pipe is not easy to slide downward in the permafrost layer, so that the upper end of the ventilation pipe is always located in the first stone roadbed to perform stable heat dissipation and cooling work.

[0009] Optionally, the bottom of the first supporting groove is lower than the lower end of the ventilation pipe.

[0010] By adopting the above technical solution, the lower end of the groove formed by the ventilation pipe and the first supporting groove can also fully contact with the frozen soil after backfilling, thereby enhancing the stability of the lower end of the ventilation pipe.

[0011] Optionally, a second supporting groove is installed on the ventilation pipe, and the second supporting groove and the first supporting groove are located on the side wall adjacent to the ventilation pipe, and a limiting hoop adapted to the outer wall of the ventilation pipe and provided with an opening is fixedly connected to the outer bottom of the second supporting groove, and an insertion rod that can be inserted into the ventilation pipe is slidably passed through the bottom of the second supporting groove, and a fixing plate is fixed to the insertion rod, and a spring is sleeved on the outside of the insertion rod, and both ends of the spring are respectively fixed to the inner bottom of the second supporting groove and the fixing plate.

[0012] By adopting the above technical solution, the limiting hoop is arranged on the outer wall of the ventilation pipe, which can not only pre-install the second support groove on the ventilation pipe, but also facilitate the connection between the insertion rod and the ventilation pipe. The second support groove and the first support groove are respectively located on the adjacent side walls of the ventilation pipe, which further increases the horizontal contact area between the ventilation pipe and the frozen soil. At the same time, the first support groove cooperates with the second support groove to make the ventilation pipe cross-shaped, and can also enhance the ventilation pipe in the frozen soil layer. It is not easy to be affected by horizontal external forces and cause the vertical state to change.

[0013] Optionally, one end of the insertion rod located outside the second supporting groove is processed into a bevel end.

[0014] By adopting the above technical solution, the second supporting groove is slid downward, and the inclined end of the insertion rod located outside the second supporting groove abuts against the outer wall of the ventilation pipe and automatically moves into the second supporting groove, and the spring is stretched by the fixing plate. When the end of the insertion rod is aligned with the insertion hole, the stretched spring automatically restores its natural length and drives the insertion rod to be inserted into the insertion hole, thereby quickly connecting the second supporting groove to the ventilation pipe.

[0015] Optionally, a filter cover is installed at the upper end of the top air duct, and the filter cover includes a cover frame that can be covered on the top air duct and spaced apart from the ventilation hole, a filter screen fixedly arranged in the cover frame, and a top screw threadedly connected to the cover frame.

[0016] By adopting the above technical solution, the detachable filter cover can effectively prevent debris from entering the construction site through the top air duct when burying the ventilation duct. When the debris collides with the filter cover and causes damage to the filter cover, the filter cover can be quickly replaced by screwing the top screw.

[0017] Optionally, the first side slope frame includes a plurality of installation rods which are parallel to each other in length direction and arranged at intervals, and a plurality of connecting rods which are fixed to the outside of the installation rods at intervals along the length direction of the installation rods; The mounting rod includes a first anchor rod section arranged vertically, a first horizontal section horizontally fixed to the upper end of the first anchor rod section, an oblique rod section fixed to the first horizontal section and spaced apart from the first anchor rod section, a second horizontal section fixed to the oblique rod section and spaced apart from the first horizontal section, and a second anchor rod section arranged vertically fixed to the second horizontal section and spaced apart from the oblique rod section.

[0018] By adopting the above technical solution, when the first slope frame is placed on the frozen soil layer and slabs of stone are laid on the first slope frame, the first anchor rod section can be buried in the first slab of stone roadbed, and the second anchor rod section can be inserted in the frozen soil layer, so as to limit the first slope frame and stably set it on the frozen soil layer, thereby achieving the purpose of improving the structural stability of the first slab of stone roadbed slope, and the external connecting rod can significantly increase the resistance between the first slope frame and the frozen soil layer and the slabs of stone, so that after slabs of stone are laid on the first slope frame to form the first slab of stone roadbed, the slope of the first slab of stone roadbed can be reinforced, and at the same time, it will not hinder the external wind from passing through the slope into the interior of the slab of stone roadbed.

[0019] Optionally, a first connecting frame is connected between the first slope frames arranged in pairs, and elbows for hooking onto the connecting rods are fixedly connected to the same sides of two opposite sides of the first connecting frame.

[0020] By adopting the above technical solution, the two first slope frames arranged in pairs are stably connected, and when the slabs of stone are laid on the first connection frame, they are pressed tightly to further enhance the stability of the slope structure of the first slab of stone roadbed.

[0021] Optionally, a limit rod is connected between two adjacent groups of first slope frames, and both ends of the limit rod are respectively provided with bending sections. A plurality of positioning angle steels are installed at intervals along the length direction of the limit rod, and the opening directions of the positioning angle steels are consistent and form an angle of 45° with the length direction of the highway.

[0022] By adopting the above technical solution, the outer wall of the ventilation pipe can be placed in the positioning angle steel when burying the ventilation pipe, so as to ensure that the inclined plate is accurately facing the slopes on both sides of the highway. After the ventilation pipe is buried, the limit rod can be removed and reused.

[0023] On the other hand, the present application provides a method for constructing a slab-stone ventilated roadbed, comprising the following construction steps: Step 1: arranging pairs of first side slope racks at intervals along the length direction of the highway; Step 2: connecting the first connection frames between the pairs of first slope frames; Step 3: connecting the limiting rods between two adjacent groups of first slope frames in an inclined manner; Step 4: bury the ventilation pipe vertically in the frozen soil layer by positioning the angle steel, with the upper end of the ventilation pipe exposed above the frozen soil layer, and remove the limit rod; Step 5: The upper end of the ventilation pipe is connected to the second support groove and the second support groove is buried; Step 6: Lay the first stone roadbed and wrap and cover the first slope frame; Step 7: Lay the partition layer; Step 8: Arrange pairs of second side slope racks at intervals along the length of the highway; Step nine: connecting the second connection frames between the paired second side slope frames; Step 10: Lay the second stone roadbed and wrap and cover the second slope frame.

[0024] In summary, this application has the following technical effects: 1. By setting up the ventilation pipe, the first slope frame, the first slab roadbed, the partition layer, the second slope frame, and the second slab stone layer, the ventilation pipe is arranged reasonably. After the wind passes through the top duct, the air at the upper end of the ventilation pipe can be quickly brought out of the top duct, thereby accelerating the flow speed of the air in the ventilation pipe and improving the temperature control efficiency of the ventilation pipe on the frozen soil layer. The wind passing through the slab stone roadbed can bring the heat out to the outside of the slab stone roadbed, thereby achieving the purpose of improving the thermal stability of the roadbed in the permafrost area and reducing the risk of frozen soil melting and roadbed settlement; 2. By setting the first support groove, the horizontal contact area between the ventilation pipe and the frozen soil layer can be increased, ensuring that the vertically arranged ventilation pipe is not easy to slide downward in the frozen soil layer, so that the upper end of the ventilation pipe is always located in the first stone roadbed to perform stable heat dissipation and cooling work; 3. By setting up a second support groove, the second support groove and the first support groove are respectively located on the side walls adjacent to the ventilation pipe, which further increases the horizontal contact area between the ventilation pipe and the frozen soil, and can also enhance the ventilation pipe in the frozen soil layer from being easily affected by horizontal external forces and causing the vertical state to change. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the cross-sectional structure of the slab-stone ventilated roadbed; Figure 2 It is a schematic diagram of the exploded structure of the ventilation pipe; Figure 3 It is a schematic diagram of the coordination structure of the ventilation pipe, the first slope frame, the first connection frame and the limit rod; Figure 4 It is a schematic diagram of the structure of the end face of the partition layer; Figure 5 It is a flow chart of the ventilated roadbed construction method.

[0026] Explanation of reference numerals: 1. frozen soil layer; 2. ventilation pipe; 21. top air duct; 211. ventilation hole; 212. plug hole; 22. inclined plate; 23. first support groove; 24. second support groove; 241. limit hoop; 242. plug rod; 243. spring; 244. fixing plate; 25. filter cover; 251. cover frame; 252. filter screen; 253. top screw; 3. first slope frame; 31. mounting rod; 311. first anchor rod section; 312. second A horizontal section; 313, an inclined rod section; 314, a second horizontal section; 315, a second anchor rod section; 32, a connecting rod; 4, a first connecting frame; 41, an elbow; 5, a first stone roadbed; 6, a partition layer; 61, a first geotextile; 62, thermal insulation board; 63, a waterproof membrane; 64, a second geotextile; 7, a second slope frame; 8, a second connecting frame; 9, a second stone roadbed; 10, a limit rod; 101, a bending section; 102, a positioning angle steel. DETAILED DESCRIPTION

[0027] The present application is further described in detail below in conjunction with the accompanying drawings. Example

[0028] The present application embodiment discloses a slab stone ventilated roadbed, referring to Figure 1 The ventilation roadbed is laid on the frozen soil layer 1, and the roadbed includes a ventilation pipe 2 vertically buried in the frozen soil layer 1 and with the upper end located outside the frozen soil layer 1, first slope frames 3 erected on the frozen soil layer 1 in pairs and symmetrically at intervals, a first connecting frame 4 connected between the paired first slope frames 3, a first stone roadbed 5 laid on the frozen soil layer 1 and buried in the paired first slope frames 3, a partition layer 6 laid flat on the first stone roadbed 5, second slope frames 7 erected on both sides of the partition layer 6 in a pair and symmetrically at intervals in the length direction, a second connecting frame 8 connected between the paired second slope frames 7, and a second stone roadbed 9 laid on the partition layer 6 and buried in the paired second slope frames 7.

[0029] Reference Figure 2 The ventilation pipe 2 is a square pipe, and a top air pipe 21 is fixedly arranged in the middle of its upper end. The top air pipe 21 is also in the shape of a square pipe. The opposite side walls of the top air pipe 21 are flush with the corresponding side walls of the ventilation pipe 2. The distance between the other opposite side walls of the top air pipe 21 is smaller than the distance between the opposite side walls of the same side of the ventilation pipe 2 and they are arranged at intervals. An inclined plate 22 is connected between the top air pipe 21 and the side wall of the ventilation pipe 2 at intervals. The inclined plate 22 is arranged downwardly from the side wall of the top air pipe 21 to the side wall of the ventilation pipe 2.

[0030] Reference Figure 2, a plurality of ventilation holes 211 are provided on the four pipe walls of the top air duct 21, and the top ventilation hole 211 is spaced apart from the edge of the top end of the top air duct 21, which can ensure the structural strength of the top end of the top air duct 21, so that after laying a cushion layer such as a slab roadbed on the top air duct 21, the top end of the top air duct 21 that bears huge gravity is not easily deformed. When laying the roadbed, multiple groups of ventilation pipes 2 are buried in the frozen soil layer 1, and the inclined plates 22 are facing both sides of the length direction of the highway. Each group of ventilation pipes 2 is provided with multiple pipes, and each group of ventilation pipes 2 is buried in an oblique line from one side of the roadbed to the other side of the roadbed along the length direction of the roadbed, and all adjacent groups of ventilation pipes 2 are staggered, so that each ventilation pipe 2 can dissipate heat and cool the inside of the frozen soil layer 1.

[0031] Reference Figure 2 A filter cover 25 is detachably connected to the upper part of the top air duct 21. The filter cover 25 includes a cover frame 251 that can be covered at the upper end of the top air duct 21, a filter screen 252 installed in the cover frame 251, and a top screw 253 installed on the side wall of the cover frame 251. After the cover frame 251 is covered on the top air duct 21, the lower edge of the cover frame 251 is spaced apart from the ventilation hole 211, and the top screw 253 can be pressed against the side wall of the top air duct 21.

[0032] Reference Figure 2 A first support groove 23 is fixedly connected to the lower ends of the two opposite side walls of the ventilation pipe 2, and the notch of the first support groove 23 faces away from the ventilation pipe 2, and the bottom surface of the first support groove 23 is at the lower end of the first ventilation pipe 2, so that the ventilation pipe 2 and the two first support grooves 23 form a groove structure. When the ventilation pipe 2 is buried in the frozen soil layer 1, a hole is first dug on the frozen soil layer 1, and then the air pipe is inserted, and finally the frozen soil is backfilled into the dug hole. After the two first support grooves 23 are located in the dug hole, the horizontal contact area between the ventilation pipe 2 and the frozen soil layer 1 can be increased, ensuring that the vertically arranged ventilation pipe 2 is not easy to slide downward in the frozen soil layer 1, so that the upper end of the ventilation pipe 2 is always located in the first stone roadbed 5 for stable heat dissipation and cooling. The lower end of the groove formed by the ventilation pipe 2 and the first support groove 23 can also fully contact the backfilled frozen soil, thereby enhancing the stability of the lower end of the ventilation pipe 2.

[0033] Reference Figure 2, a plug hole 212 for connecting to the second support groove 24 is respectively provided on two opposite outer walls of a section of the ventilation pipe 2 near the top end of the air pipe 21, and the plug hole 212 and the first support groove 23 are located on two adjacent side walls of the ventilation pipe 2. A limiting hoop 241 is fixedly connected to the outer bottom of the second support groove 24, and one side of the limiting hoop 241 in the length direction is flush with one outer wall of the second support groove 24, and the other side is spaced apart from the other outer wall of the second support groove 24. The two ends of the limiting hoop 241 are spaced apart to form an opening, and the limiting hoop 241 is adapted to the end face of the ventilation pipe 2 and can be sleeved on the outer wall of the ventilation pipe 2. The limiting hoop 241 with an opening has a certain deformation ability, so it is easy to be sleeved on the ventilation pipe 2.

[0034] An insertion rod 242 is movably provided on the bottom of the second support groove 24. The insertion rod 242 is a square rod and one end of the insertion rod 242 located at the outer bottom of the second support groove 24 is processed to form an inclined surface. The side of the inclined surface away from the end of the insertion rod 242 is flush with the outer bottom of the second support groove 24. A spring 243 is sleeved on the insertion rod 242, and one end of the spring 243 is fixedly connected to the inner bottom of the second support groove 24. A fixing plate 244 is provided and fixedly connected to the insertion rod 242. The fixing plate 244 is located in the notch of the second support groove 24. The spring 243 is located between the fixing plate 244 and the bottom of the second support groove 24, and the other end of the spring 243 is fixedly connected to the fixing plate 244.

[0035] After the first supporting groove 23 is buried, the limiting hoop 241 is sleeved on the outer wall of the ventilation pipe 2, which can not only pre-install the second supporting groove 24 on the ventilation pipe 2, but also align the insertion rod 242 with the insertion hole 212. When the second supporting groove 24 is slid downward, the inclined end of the insertion rod 242 located outside the second supporting groove 24 abuts against the outer wall of the ventilation pipe 2 and automatically moves into the second supporting groove 24, and stretches the spring 243 through the fixing plate 244. When the end of the insertion rod 242 is aligned with the insertion hole 212, the stretched spring 243 automatically restores its natural length and drives the insertion rod 242 to be inserted into the insertion hole 212, thereby quickly connecting the second supporting groove 24 to the ventilation pipe 2. The second support groove 24 and the first support groove 23 are respectively located on the side walls adjacent to the ventilation pipe 2, further increasing the horizontal contact area between the ventilation pipe 2 and the frozen soil. At the same time, the first support groove 23 cooperates with the second support groove 24 to make the ventilation pipe 2 cross-shaped, and can also enhance the ventilation pipe 2 in the frozen soil layer 1. It is not easy to be affected by horizontal external forces and cause the vertical state to change.

[0036] Reference Figure 3The first side slope frames 3 are arranged in pairs at equal intervals along the length direction of the highway. The first side slope frames 3 include three mutually parallel mounting rods 31 and multiple connecting rods 32 fixed to the mounting rods 31. The multiple connecting rods 32 are arranged at equal intervals along the length direction of the mounting rods 31. The length direction of the connecting rods 32 is aligned with the length direction of the mounting rods 31. The mounting rod 31 includes a first anchor rod segment 311 formed by integral bending and vertical arrangement, a first horizontal segment 312 connected to the upper end of the first anchor rod segment 311 at one end, an oblique rod segment 313 connected to the first horizontal segment 312 at the upper end away from the first anchor rod segment 311 to obtain an oblique rod segment 313, a second horizontal segment 314 connected to the lower end of the oblique rod segment 313 at one end, and a second anchor rod segment 315 connected to the second horizontal segment 314 at the upper end away from the oblique rod segment 313. The oblique rod segment 313 is inclined from the upper end to the lower end in the direction in which the first horizontal segment 312 is away from the first anchor rod segment 311. The connecting rod 32 is fixedly arranged on the outer wall of the mounting rod 31, the length direction of the first horizontal section 312 is parallel to the length direction of the second horizontal section 314, and the length direction of the first anchor rod section 311 is parallel to the length direction of the second anchor rod.

[0037] When the first slope frame 3 is placed on the frozen soil layer 1 and flagstones are laid on the first slope frame 3, the first anchor section 311 can be buried in the first flagstone roadbed 5, and the second anchor section 315 can be inserted in the frozen soil layer 1, so as to limit the first slope frame 3 and stably set it on the frozen soil layer 1, thereby achieving the purpose of improving the structural stability of the slope of the first flagstone roadbed 5. The external connecting rod 32 can significantly increase the resistance between the first slope frame 3 and the frozen soil layer 1 and the flagstones, so that after flagstones are laid on the first slope frame 3 to form the first flagstone roadbed 5, the slope of the first flagstone roadbed 5 can be reinforced, and at the same time, it will not hinder the external wind from passing through the slope into the flagstone roadbed.

[0038] Reference Figure 3 The first connecting frame 4 is a rectangular frame structure. Two elbows 41 are fixedly connected on the same side of the two opposite edges of the first connecting frame 4. The elbows 41 can be inserted into the connecting rod 32 located on the second horizontal section 314, so as to stably connect the two first slope frames 3 arranged in pairs. When the slabs are laid on the first connecting frame 4, they are pressed tightly to further enhance the slope structure stability of the first slab roadbed 5.

[0039] Reference Figure 4The isolation layer 6 includes, from bottom to top, a first geotextile 61, a heat-insulating board 62, a waterproof roll 63, and a second geotextile 64. The geotextile can improve the surface stability of the rubble roadbed and improve the bearing capacity of the rubble roadbed. At the same time, the first geotextile 61 and the second geotextile 64 are located on the upper and lower surfaces respectively to protect the heat-insulating board 62 and the waterproof roll 63. The heat-insulating board 62 significantly improves the heat-insulating effect on the frozen soil layer 1, and the waterproof roll 63 can effectively reduce the possibility of rainwater outside the roadbed entering the frozen soil layer 1 and causing the frozen soil layer 1 to melt and settle.

[0040] Reference Figure 1 , multiple groups of second slope frames 7 are arranged at equal intervals along the length direction of the highway, and the second slope frames 7 are located above the two first slope frames 3, so that the first slope frames 3 and the second slope frames 7 are arranged in an up-down staggered manner, and the roadbed and slope are reinforced in all directions. The difference between the second slope frame 7 and the first slope frame 3 is that the second horizontal section 314 of the second slope frame 7 is not provided with an anchor rod, so the partition layer 6 can be protected, and the spacing between the two second slope frames 7 arranged in pairs on both sides of the first stone roadbed 5 is smaller than the spacing between a pair of first slope frames 3, and the oblique rod and the oblique rod section 313 of the second slope frame 7 are located on the same inclined plane. The second connecting frame 8 has the same structure as the first connecting frame 4 and is shorter than the first connecting frame 4. The second connecting frame 8 is connected between a pair of second slope frames 7.

[0041] Reference Figure 3 When burying the ventilation pipe 2, a limit rod 10 can be pre-connected between two adjacent groups of first slope frames 3 that are obliquely opposite to each other. The two ends of the limit rod 10 are respectively bent to form a bending section 101, and the bending section 101 can be hooked on the connecting rod 32 located in the second horizontal section 314. A plurality of positioning angle steels 102 are welded at equal intervals on the limit rod 10, and the notch of the positioning angle steel 102 is 45° in the direction of the length of the highway. When burying the ventilation pipe 2, the outer wall of the ventilation pipe 2 can be placed in the positioning angle steel 102, thereby ensuring that the inclined plate 22 is accurately facing the slopes on both sides of the highway. After the ventilation pipe 2 is buried, the limit rod 10 is removed and reused.

[0042] The slope frame can reinforce the roadbed slope and significantly improve the structural strength of the roadbed slope. The rubble roadbed can change the shape of the roadbed surface and the heat transfer mechanism to reasonably adjust the temperature state of the frozen soil layer 1. In the warm season, it can effectively prevent the external heat from penetrating into the frozen soil layer 1. The vertical and obliquely staggered ventilation pipes 2 can transfer the heat inside the frozen soil layer 1 to the rubble roadbed. The wind passing through the rubble roadbed can bring the heat out of the rubble roadbed, thereby achieving the purpose of improving the thermal stability of the roadbed in permafrost areas and reducing the risk of frozen soil melting and roadbed settlement. Example

[0043] The present application embodiment discloses a method for constructing a slab stone ventilated roadbed, referring to Figure 5 , the construction plan includes the following construction steps: Step 1: arranging pairs of first side slope frames 3 at intervals along the length direction of the highway on both sides of the highway; Step 2: Connect the first connection frame 4 between the paired first slope frames 3; Step 3: connecting the limiting rod 10 obliquely between two adjacent groups of first slope frames 3; Step 4: vertically bury the ventilation pipe 2 in the frozen soil layer 1 by positioning the angle steel 102 and the upper end of the ventilation pipe 2 is exposed above the frozen soil layer 1; Step 5: Connect the second support groove 24 to the upper end of the ventilation pipe 2 and bury the second support groove 24; Step 6: laying the first stone roadbed 5 on the frozen soil layer 1 and wrapping and covering the first slope frame 3; Step 7: Laying a barrier layer 6 on the first stone roadbed 5; Step 8: Arrange pairs of second side slope frames 7 on the partition layer 6 at intervals along the length direction of the highway; Step nine: connecting the second connection frame 8 between the paired second side slope frames 7; Step 10: Lay the second stone roadbed 9 on the isolation layer 6 and wrap and cover the second slope frame 7.

[0044] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A slab stone ventilated roadbed, characterized in that: The invention comprises a plurality of ventilation pipes (2) vertically inserted in a frozen soil layer (1), a pair of first side slope frames (3) arranged at intervals on both sides of the length direction of the highway along the length direction of the highway, a first stone roadbed (5) laid on the frozen soil layer (1) and wrapped around and covered the first side slope frames (3), a barrier layer (6) laid on the first stone roadbed (5), a pair of second side slope frames (7) arranged on both sides of the length direction of the highway along the length direction of the highway, and a second stone layer laid on the barrier layer (6) and wrapped around and covered the second side slope frames (7); The plurality of ventilation pipes (2) are arranged in a staggered manner along the length direction of the highway, and the first side slope frame (3) and the second side slope frame (7) are arranged in a staggered manner up and down; The ventilation pipe (2) is a square pipe, and a top air pipe (21) is arranged in the middle of the upper end of the ventilation pipe (2). The top air pipe (21) is a square pipe and its pipe opening is smaller than the pipe opening of the ventilation pipe (2). The two opposite side walls of the top air pipe (21) are flush with the two opposite side walls of the ventilation pipe (2). The other two opposite side walls of the top air pipe (21) are arranged spaced from the other two side walls of the ventilation pipe (2). A plurality of ventilation holes (211) are arranged on the side walls of the top air pipe (21). An inclined plate (22) is connected between the top air pipe (21) and the ventilation pipe (2). The inclined plate (22) is arranged downwardly from the outer wall of the top air pipe (21) to the outer wall of the ventilation pipe (2).

2. The slab ventilated roadbed according to claim 1, characterized in that: The lower ends of the two opposite side walls of the ventilation pipe (2) are fixedly connected with first supporting grooves (23).

3. The slab ventilated roadbed according to claim 2, characterized in that: The bottom of the first supporting groove (23) is lower than the lower end of the ventilation pipe (2).

4. The slab ventilated roadbed according to claim 3, characterized in that: A second support groove (24) is installed on the ventilation pipe (2). The second support groove (24) and the first support groove (23) are located on the side wall adjacent to the ventilation pipe (2). A limiting hoop (241) adapted to the outer wall of the ventilation pipe (2) and provided with an opening is fixedly connected to the outer bottom of the second support groove. An insertion rod (242) capable of being inserted into the ventilation pipe (2) is slidably penetrated through the bottom of the second support groove (24). A fixing plate (244) is fixedly connected to the insertion rod (242). A spring (243) is sleeved on the outside of the insertion rod (242). Two ends of the spring (243) are respectively fixedly connected to the inner bottom of the second support groove (24) and the fixing plate (244).

5. The slab stone ventilated roadbed according to claim 4, characterized in that: One end of the insertion rod (242) located outside the second support groove (24) is processed into a bevel end.

6. The slab ventilated roadbed according to claim 1, characterized in that: A filter cover (25) is installed at the upper end of the top air duct (21), and the filter cover (25) comprises a cover frame (251) that can be covered on the top air duct (21) and spaced apart from the ventilation hole (211), a filter screen (252) fixedly arranged in the cover frame (251), and a top screw (253) threadedly connected to the cover frame (251).

7. The slab stone ventilated roadbed according to claim 1, characterized in that: The first side slope frame (3) comprises a plurality of installation rods (31) which are parallel to each other in the length direction and are arranged at intervals, and a plurality of connecting rods (32) which are fixed to the outside of the installation rods (31) at intervals along the length direction of the installation rods (31); The mounting rod (31) includes a first anchor rod section (311) arranged vertically, a first horizontal section (312) horizontally fixed to the upper end of the first anchor rod section (311), an inclined rod section (313) fixed to the first horizontal section (312) and spaced apart from the first anchor rod section (311), a second horizontal section (314) fixed to the inclined rod section (313) and spaced apart from the first horizontal section (312), and a second anchor rod section (315) arranged vertically fixed to the second horizontal section (314) and spaced apart from the inclined rod section (313).

8. The slab ventilated roadbed according to claim 7, characterized in that: A first connection frame (4) is connected between the first slope frames (3) arranged in pairs, and elbows (41) for hooking onto the connection rod (32) are fixedly connected on the same sides of two opposite sides of the first connection frame (4).

9. The slab stone ventilated roadbed according to claim 8, characterized in that: A limit rod (10) is also connected between two adjacent groups of first slope frames (3), and both ends of the limit rod (10) are respectively provided with a bending section (101). A plurality of positioning angle steels (102) are installed at intervals along the length direction of the limit rod (10), and the opening directions of the positioning angle steels (102) are consistent and form an angle of 45° with the length direction of the highway.

10. A method for constructing a slab-stone ventilated roadbed according to any one of claims 1 to 9, characterized in that: The construction steps include: Step 1: arranging pairs of first side slope frames (3) at intervals along the length direction of the highway; Step 2: connecting the first connection frames (4) between the pairs of first slope frames (3); Step 3: Obliquely connecting the limiting rods (10) between two adjacent groups of first slope frames (3); Step 4: vertically bury the ventilation pipe (2) in the frozen soil layer (1) by using the positioning angle steel (102) so that the upper end of the ventilation pipe (2) is exposed above the frozen soil layer (1) and the limiting rod (10) is removed; Step 5: The upper end of the ventilation pipe (2) is connected to the second support groove (24) and the second support groove (24) is buried; Step 6: Lay the first stone roadbed (5) and wrap and cover the first slope frame (3); Step 7: Laying the insulation layer (6); Step 8: arranging pairs of second side slope frames (7) at intervals along the length direction of the highway; Step nine: connecting the second connecting frames (8) between the paired second side slope frames (7); Step 10: Lay the second stone roadbed (9) and wrap and cover the second side slope frame (7).

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