阅读说明：本技术 多年冻土区遮阳通风路基结构及其施工方法 (Sunshade and ventilation roadbed structure for permafrost region and construction method thereof ) 是由 张明义 晏忠瑞 裴万胜 赖远明 代彦军 于 2020-08-03 设计创作，主要内容包括：本申请公开一种多年冻土区遮阳通风路基结构及其施工方法。多年冻土区遮阳通风路基结构包括路基和百叶窗式遮阳板。百叶窗式遮阳板沿路基的纵向铺设于路基的边坡,且百叶窗式遮阳板中的每一个遮阳翅片与路基的坡面具有间隙。本申请提供的技术方案能够防止路基阴阳坡现象的产生,解决路基温度场不对称性的问题,提高了多年冻土路基的长期稳定性。(The application discloses sunshade and ventilation roadbed structure in permafrost region and construction method thereof. The sunshade and ventilation roadbed structure of the permafrost region comprises a roadbed and a shutter type sunshade. The louver type sun-shading boards are laid on the side slope of the roadbed along the longitudinal direction of the roadbed, and gaps are reserved between each sun-shading fin of the louver type sun-shading boards and the slope surface of the roadbed. The technical scheme that this application provided can prevent the production of negative and positive slope phenomenon of road bed, solves the asymmetric problem in road bed temperature field, has improved the long-term stability of permafrost road bed.)

1. The utility model provides a many years frozen soil district sunshade ventilation roadbed structure which characterized in that includes:

a roadbed; and

a louver type sun shield;

the louver type sun-shading boards are longitudinally laid on the side slope of the roadbed, and gaps are reserved between each sun-shading fin of the louver type sun-shading boards and the slope surface of the roadbed.

2. The sunshade ventilation roadbed structure of the permafrost region according to claim 1,

in the louver type sun visor, the edges of the adjacent two sun-shading fins close to each other are positioned on a horizontal plane.

3. The sunshade ventilation roadbed structure of the permafrost region according to claim 1,

the sunshade fin is an iron sheet or an aluminum-plastic plate.

4. The sunshade ventilation roadbed structure of the permafrost region according to claim 1,

the surface of the sun-shading fin is coated with heat reflection paint.

5. The sunshade ventilation roadbed structure of the permafrost region according to claim 1,

the louver type sun shield comprises a connecting frame and a reinforcing rod fixed in the connecting frame, and a plurality of sun-shading fins are vertically arranged in the connecting frame at intervals in an inclined mode;

the reinforcing rod extends along the arrangement direction of the plurality of sunshade fins and is connected with each sunshade fin.

6. The sunshade ventilation roadbed structure of the permafrost region according to claim 5,

the distance between the connecting frame and the slope of the roadbed is 0.2-0.7 m.

7. The sunshade ventilation roadbed structure of the permafrost region according to claim 6,

the sunshade ventilating roadbed structure of the permafrost region further comprises a connecting bearing platform structure, wherein the connecting bearing platform structure is divided into a first reinforced concrete connecting bearing platform and a second reinforced concrete connecting bearing platform, the first reinforced concrete connecting bearing platform is connected with the bottom end of the connecting frame, and the second reinforced concrete connecting bearing platform is connected with the top end of the connecting frame;

a plurality of first reinforced concrete connection cushion cap is followed the longitudinal separation of road bed is located the side position of road bed, and is a plurality of second reinforced concrete connection cushion cap is followed the longitudinal separation of road bed is located the dirt shoulder department of road bed.

8. The sunshade ventilation roadbed structure of the permafrost region according to claim 7,

the connecting bearing platform structure comprises a reinforced concrete bearing platform body, an embedded bolt and an upright post;

the embedded bolt is embedded in the reinforced concrete bearing platform body in advance, and the stand column is fixed on the embedded bolt;

the connecting frame is provided with an interface used for being connected with the upright post.

9. The sunshade ventilation roadbed structure of the permafrost region according to claim 1,

the sunshade ventilation roadbed structure in the permafrost region further comprises a heat preservation plate, wherein the heat preservation plate is buried in the roadbed, and the heat preservation plate extends longitudinally of the roadbed.

10. A permafrost region roadbed construction method is characterized by comprising the following steps:

constructing a compacted and tamped roadbed on the compacted ground, and embedding a heat insulation board below the road surface;

installing the louver type sun-shading boards, erecting the louver type sun-shading boards on the side slope of the roadbed, wherein gaps are reserved between each sun-shading fin in the louver type sun-shading boards and the slope surface of the roadbed.

Technical Field

The application relates to the technical field of roadbed structures, in particular to a sunshade and ventilation roadbed structure in a permafrost region and a construction method thereof.

Background

The permafrost area accounts for 25% of the global land area, and the permafrost area accounts for about 22.4% of the land area in China, the third permafrost large country in the world. There are a large number of railways/highways that pass through these particular areas, all of which inevitably face severe permafrost problems. Particularly, in the Qinghai-Tibet plateau, the construction of railway/highway engineering changes the process of ground-gas heat exchange, and the strong solar radiation effect causes serious degradation of permafrost at the lower part and outstanding negative and positive slope problems of the roadbed, so that the problem of roadbed uneven settlement caused by the serious degradation compromises the driving safety, and is not ignored, therefore, an economic, safe and efficient method measure is urgently needed to be explored to solve the problem of roadbed uneven settlement caused by negative and positive slopes in the permafrost region.

Disclosure of Invention

The application provides a sunshade ventilation roadbed structure in a permafrost region and a construction method thereof, which can solve the problem of roadbed differential settlement induced by yin-yang slopes.

In a first aspect, an embodiment of the present invention provides a sunshade and ventilation roadbed structure for a permafrost region, which includes a roadbed and louver type sunshade boards.

The louver type sun-shading boards are laid on the side slope of the roadbed along the longitudinal direction of the roadbed, and gaps are reserved between each sun-shading fin of the louver type sun-shading boards and the slope surface of the roadbed.

Above-mentioned scheme provides one kind can be in permafrost region, prevents the production of negative and positive slope phenomenon, solves the asymmetric problem in road bed temperature field, improves permafrost region sunshade ventilation road bed structure of permafrost road bed long-term stability. The compacted and compacted roadbed is built on the compacted ground surface, and the louver type sun-shading boards are installed on the side slopes of the roadbed at a certain laying height, so that gaps are reserved between each sun-shading fin in the louver type sun-shading boards and the slope surfaces of the roadbed. In the prior art, in sunny days, when the solar altitude angle is low, the sunny slope of the roadbed is irradiated by sunlight, and the cloudy slope of the roadbed is in shadow; when the solar altitude is higher, the solar radiation intensity on the sunny slope of the roadbed is higher than that on the cloudy slope of the roadbed. By laying the shutter type sun-shading boards on the side slope of the roadbed, the symmetry of the roadbed temperature field can be effectively regulated and controlled. Each sun-shading fin is arranged at intervals, and a gap is formed between each sun-shading fin and the slope surface of the roadbed, so that the louver type sun-shading plate has the ventilation characteristic, the louver type sun-shading plate is prevented from being damaged by strong wind, meanwhile, forced convection is generated by using external air with the annual average temperature of a permafrost region being negative, the permafrost roadbed is cooled, and the symmetry of a roadbed temperature field is facilitated.

In an alternative embodiment, in a louvered sun visor, the mutually adjacent edges of two adjacent sun shading fins are in a horizontal plane.

In an alternative embodiment, the sunshade fins are iron sheets or aluminum-plastic plates.

In an alternative embodiment, the surface of the sunshade fins is coated with a heat reflective coating.

In an alternative embodiment, the venetian blind type sun visor includes a connection frame and a reinforcing rod fixed in the connection frame, wherein the plurality of sun-shading fins are arranged in the connection frame at intervals along the vertical direction and in an inclined manner, and the reinforcing rod extends along the arrangement direction of the plurality of sun-shading fins and is connected with each sun-shading fin.

In an alternative embodiment, the distance between the connection frame and the slope of the roadbed is 0.2-0.7 m.

In an optional embodiment, the sunshade and ventilation roadbed structure in the permafrost region further comprises a connecting bearing platform structure, wherein the connecting bearing platform structure is divided into a first reinforced concrete connecting bearing platform and a second reinforced concrete connecting bearing platform, the first reinforced concrete connecting bearing platform is connected with the bottom end of the connecting frame, and the second reinforced concrete connecting bearing platform is connected with the top end of the connecting frame;

the first reinforced concrete connecting bearing platforms are arranged at the lateral side of the roadbed at intervals along the longitudinal direction of the roadbed, and the second reinforced concrete connecting bearing platforms are arranged at the soil shoulder of the roadbed at intervals along the longitudinal direction of the roadbed.

In an optional embodiment, the connecting bearing platform structure comprises a reinforced concrete bearing platform body, embedded bolts and upright posts;

the embedded bolt is embedded in the reinforced concrete bearing platform body, and the stand column penetrates through the embedded bolt;

the connecting frame is provided with an interface used for being connected with the upright post.

In optional implementation mode, the sunshade ventilation roadbed structure in permafrost region still includes the heated board, and the heated board is buried in the road bed inside, and along the longitudinal extension of road bed.

In a second aspect, the application further provides a permafrost region roadbed construction method, which includes the following steps: constructing a compacted and tamped roadbed on the compacted ground, and embedding a heat insulation board below the road surface;

and installing the louver type sun-shading boards, erecting the louver type sun-shading boards on a side slope of the roadbed, and enabling each sun-shading fin in the louver type sun-shading boards to have a gap with the slope surface of the roadbed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural view of a sunshade and ventilation roadbed structure in a permafrost region in the embodiment;

FIG. 2 is a schematic perspective view of a sunshade and ventilation roadbed structure in the permafrost region in the present embodiment;

FIG. 3 is a schematic structural diagram of a connection platform structure in the present embodiment;

fig. 4 is a temperature field of a general roadbed in the comparative example 10 months in 10 years after the construction is completed;

fig. 5 shows a temperature field of the sunshade and ventilation roadbed structure in the permafrost region 10 th year and 10 th month after the construction is completed in the embodiment.

Icon: 10A-the earth's surface; 10-sunshade ventilating roadbed structure in permafrost region; 11-a roadbed; 12-louvered sun visor; 13-connecting a bearing platform structure; 13 a-a first reinforced concrete connection bearing platform; 13 b-a second reinforced concrete connection bearing platform; 14-a heat-insulating board; 120-a connecting frame; 121-sun-shading fins; 122-a reinforcing rod; 130-reinforced concrete cushion cap body; 131-embedding bolts; 132-vertical column.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, refer to the orientation or positional relationship as shown in the drawings, or as conventionally placed in use of the product of the application, or as conventionally understood by those skilled in the art, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present application.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The technical solution in the present application will be described below with reference to the accompanying drawings.

The embodiment provides a permafrost region sunshade ventilation roadbed structure 10, which can prevent the generation of roadbed yin-yang slope phenomenon, solve the problem of roadbed temperature field asymmetry, and improve the long-term stability of permafrost roadbed.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a sunshade and ventilation roadbed structure 10 in a permafrost region in the present embodiment, and fig. 2 is a perspective view of the sunshade and ventilation roadbed structure 10 in the permafrost region in the present embodiment.

The sunshade and ventilation roadbed structure 10 of the permafrost region comprises a roadbed 11, a shutter type sunshade plate 12, a connecting bearing platform structure 13 and an insulation board 14. The subgrade 11 is constructed on a compacted earth surface 10A.

The louvered sun visor 12 includes a connecting frame 120 and a plurality of sun shade fins 121, and the plurality of sun shade fins 121 are vertically spaced and obliquely provided in the connecting frame 120. The louver type sun-shading boards 12 are laid on the side slopes of the roadbed 11 through the connecting bearing platform structures 13. The insulation board 14 is arranged inside the roadbed 11, and the insulation board 14 extends along the longitudinal direction of the roadbed 11. In warm seasons, the insulation board 14 can slow down the degree to which the road surface (asphalt road surface) of the roadbed 11 absorbs external heat and transfers the heat into the interior of the roadbed 11, so as to improve the stability of the roadbed 11. It should be noted that the thickness of the heat insulation board 14 may be 0.05-0.10 m, in this embodiment, the thickness is 0.10 m, and in other specific embodiments, the thickness of the heat insulation board 14 may also be 0.06 m, 0.07 m, 0.08 m, and the like.

The connection cap structure 13 is divided into a first reinforced concrete connection cap 13a and a second reinforced concrete connection cap 13 b. The first reinforced concrete connection cap 13a is used to connect the bottom ends of the connection frames 120, and the second reinforced concrete connection cap 13b is used to connect the top ends of the connection frames 120.

The first reinforced concrete connection bearing platforms 13a are arranged at the lateral side of the roadbed 11 at intervals along the longitudinal direction of the roadbed 11, and the second reinforced concrete connection bearing platforms 13b are arranged at the soil shoulder position of the roadbed 11 at intervals along the longitudinal direction of the roadbed 11.

The bottom end and the top end of the louver type sun visor 12 are respectively connected to the first reinforced concrete connecting bearing platform 13a and the second reinforced concrete connecting bearing platform 13b, so that the louver type sun visor 12 is suspended and laid on the side slope of the roadbed 11, and the louver type sun visors 12 are laid along the longitudinal direction of the roadbed 11. Each of the shade fins 121 of the louver type shade 12 has a clearance from the slope of the roadbed 11.

Referring to fig. 1, the louver type sun visor 12 is laid on both sides of the roadbed 11 (i.e., both the sunny slope and the cloudy slope are laid), and correspondingly, the connecting bearing platform structures 13 are also distributed on both sides of the roadbed 11. In other embodiments, the louvered sun visor 12 may be installed on the sunny slope of the road bed 11.

Referring to fig. 2, in the venetian blind type sun visor 12, the edges of two adjacent sun visor fins 121 close to each other are in a horizontal plane (the lower edge of the upper sun visor fin 121 and the upper edge of the lower sun visor fin 121 are in a horizontal plane), which functions as: when the sun just rises, i.e. the solar altitude is zero, the solar radiation will horizontally and directly irradiate the sunny slope of the roadbed 11. Therefore, the upper edges and the lower edges of two adjacent sunshade fins 121 are located at the same horizontal plane, so that the solar radiation can be prevented from directly reaching the sunny slope of the roadbed 11. Meanwhile, since the second reinforced concrete connection bearing platform 13b is arranged at the position of the road shoulder of the roadbed 11, the action surface of the sun-shading fin 121 can extend to the position of the road shoulder of the roadbed 11, and when the solar altitude is maximum, the solar radiation can be prevented from directly irradiating the road shoulder of the sunny slope. Obviously, the sunshade fins 121 can provide a sunshade effect when the solar altitude is between the minimum and maximum.

Wherein, the unsettled slope of locating road bed 11 of shutter formula sunshading board 12 is gone up, and each shading fin 121 and road bed 11 domatic have the clearance for shutter formula sunshading board 12 has the characteristic of ventilation, and in the frozen soil district of many years, shutter formula sunshading board 12 that has the ventilation characteristic can avoid suffering the destruction of strong wind, has still utilized the frozen soil district of many years average temperature for the outside air of burden, produces forced convection, cools off road bed 11.

It should be noted that the sunshade fins 121 are iron sheets or aluminum-plastic plates, in this embodiment, the sunshade fins 121 are aluminum-plastic plates, and in other specific embodiments, the material of the sunshade fins 121 is not limited, so that the sunshade effect can be achieved, and the strength of bearing the wind force in the permafrost region can be achieved.

To improve the shading effect, the surface of the shading fin 121 may be coated with a heat reflective paint. The heat-reflecting coating is a coating which can make the coated object generate a temperature regulation effect under the irradiation of sunlight, and comprises a solar shielding coating, a solar heat-reflecting coating, a space heat-insulating coating, an energy-saving heat-insulating coating and the like.

Referring to fig. 2, in order to ensure the strength of the sun visor 12, the sun visor 12 further includes a reinforcing rod 122 fixed in the connecting frame 120, and the reinforcing rod 122 extends along the arrangement direction of the plurality of sun-shading fins 121 and connects each of the sun-shading fins 121.

It should be noted that all the sunshade fins 121 are disposed at intervals in an inclined manner, so that the reinforcing rod 122 can be inserted and fixed in each sunshade fin 121 to reinforce and connect the sunshade fins 121.

It should be noted that while fig. 2 illustrates one reinforcing rod 122, in other embodiments, a plurality of reinforcing rods 122 may be provided for reinforcing connection in one louvered sun visor 12.

In the louver type sun visor 12, the distance between the connecting frame 120 and the slope of the roadbed 11 (the laying height h) is 0.2 to 0.7 m. The length of the sunshade fins 121 may be determined according to the field situation, and the width b is 0.2-2.0 meters.

In this embodiment, the distance (laying height h) between the connection frame 120 and the slope of the roadbed 11 is 0.5 m, the width b of the sunshade fins 121 is 1.0 m, and the inclination angle α of the sunshade fins 121 is 30 °. In other embodiments, the above values can be adjusted according to local parameters such as ambient wind speed, air temperature, roadbed type, roadbed height, etc. in manufacturing the louver type sun visor 12, that is, the above values can be adjusted according to local parameters such as ambient wind speed, air temperature, roadbed type, roadbed height, etc. in manufacturing the louver type sun visor 12, so as to manufacture the louver type sun visor 12 meeting the actual requirements.

Referring to fig. 3, fig. 3 is a schematic structural diagram of the connection platform structure 13.

The connection cap structure 13 includes a reinforced concrete cap body 130, embedded bolts 131, and columns 132.

The embedded bolts 131 are embedded in the reinforced concrete bearing platform body 130, and the columns 132 are fixed to the embedded bolts 131.

The connecting frame 120 has an interface (not shown) for connecting to the upright 132. In operation, the interface of the connecting frame 120 may be directly mated to the posts 132 to complete the connection of the louvered visor 12 to the connecting platform structure 13.

It should be noted that, in other embodiments, the connecting bearing platform structure 13 may be eliminated, the louver type sun visor 12 is directly laid on the slope of the roadbed 11, and a gap is formed between each sun visor fin 121 of the louver type sun visor 12 and the slope of the roadbed 11.

Above-mentioned scheme provides one kind can be in the permafrost region, prevents the production of negative and positive slope phenomenon, solves the asymmetric problem in road bed temperature field, improves the permafrost region sunshade ventilation road bed structure 10 of 11 long-term stability of permafrost region road bed. The compacted and compacted roadbed 11 is built on the compacted earth surface, and the louver type sun-shading boards 12 are installed on the side slope of the roadbed 11 at a certain laying height, so that each sun-shading fin 121 in the louver type sun-shading boards 12 has a clearance with the slope surface of the roadbed 11. In sunny days, when the solar altitude is low, the sunny slope of the roadbed 11 is irradiated by sunlight, while the cloudy slope of the roadbed 11 is in shadow, when the solar altitude is higher, the intensity of solar radiation received by the sunny slope of the roadbed 11 is also higher than that of the shade slope of the roadbed 11, in order to eliminate the balance of radiation intensity suffered by the sunny slope and the cloudy slope of the roadbed 11 due to the effect of the sunny slope and the cloudy slope, by laying the shutter type sun-shading boards 12 on the side slope of the roadbed 11, the symmetry of the temperature field of the roadbed 11 can be effectively regulated and controlled, meanwhile, each sun-shading fin 121 is arranged at intervals, and a gap is formed between each sun-shading fin and the slope surface of the roadbed 11, so that the louver type sun-shading board 12 has the ventilation characteristic, the louver type sun-shading board 12 is prevented from being damaged by strong wind, meanwhile, the external air with the annual average temperature of the permafrost region being negative temperature is utilized to generate forced convection to cool the frozen soil roadbed 11, thereby being beneficial to the symmetry of the temperature field of the roadbed 11. Meanwhile, the heat insulation plate 14 is arranged inside the roadbed 11, so that the heat absorption and conduction of the asphalt pavement of the roadbed 11 from the outside to the inside of the roadbed 11 can be avoided or slowed down.

The sunshade ventilation roadbed structure 10 in the permafrost region provided by the embodiment does not need external power supply, is environment-friendly and pollution-free, and does not generate negative thermal disturbance to the permafrost below the roadbed. The louver type sun shield 12 is simple in structure, can be operated in a modularization mode, is matched with the bearing platform structure 13, is easy to install, greatly reduces construction cost, and is easy to maintain.

In order to verify the effect of the sunshade and ventilation roadbed structure 10 in the permafrost region provided by the embodiment on preventing and treating the negative and positive slope effects of the roadbed 11, the invention takes the Qinghai-Tibet highway as an example to carry out numerical verification: