CN112030788A - Wind-proof sand-blocking device for wind-sand area and wind-sand protection system for roadbed of wind-sand area - Google Patents

Abstract

The invention relates to the field of wind and sand prevention and control, and provides a wind and sand prevention device for a wind and sand area and a roadbed wind and sand protection system for the wind and sand area. The device comprises a blocking part, a net blocking part arranged above the blocking part and an intercepting fence which is positioned at the top of the net blocking part and extends from the top of the net blocking part to the windward side; the blocking part comprises a plurality of blocking bodies and fixing upright posts for fixing two adjacent blocking bodies; the net blocking part comprises a plurality of net blocking parts and fixing pillars for fixing two adjacent net blocking parts, and the net blocking parts are arranged at the tops of the fixing pillars through the fixing pillars; the intercepting fence comprises a fixed support and an intercepting net arranged on the fixed support, the intercepting net is arranged on one side, located on the windward side, of the fixed support through the fixed support, and the intercepting net are arranged in an included angle. The invention adopts a structure of being sparse at the top and dense at the bottom, can reduce the disturbance to the wind and sand flow to the maximum extent while effectively blocking sand, wind, dust and hay, ensures the local air flow stability to the maximum extent, and improves the protection effect to the wind and sand area.

Description

Wind-proof and sand-blocking device for wind-sand area and roadbed wind-sand protection system in wind-sand area

technical field

The invention relates to the technical field of wind-sand prevention and control, in particular to a wind- and sand-blocking device for a wind-sand area and a roadbed wind-sand protection system in the wind-sand area.

Background technique

The sand/gravel disaster in the Gobi windy area is extremely serious, posing a great threat to the safe operation of the main traffic lines, such as railways and highways.

There are at least the following problems in the subgrade wind and sand blocking technology in the prior art:

(1) In the prior art, the wind-proof and sand-blocking technology of the roadbed in the Gobi strong wind area mainly focuses on setting a wind-blocking wall on the windward side end of the roadbed. The wind-blocking wall is a non-ventilated structure with a height of 4-4.5m. The wind-blocking wall can effectively block the direct impact of the strong wind on the train and avoid the damage of the strong wind. Because the windshield adopts a non-ventilated structure, the direct damage of wind and gravel to the train is slowed down. However, the setting of the windshield wall disturbed the flow field of the roadbed, resulting in the formation of an airflow wind shadow area in the downwind direction of the roadbed and the roadbed. The airflow in the wind shadow area is in a turbulent state, and there are many vortices or vortices, and the airflow vortex will form Airflow in the opposite direction of the prevailing wind. As a result, sand and dust such as sand and gravel in the downwind direction of the subgrade are brought to the subgrade by the vortex airflow, resulting in a large amount of sand accumulation on the track bed, track and the inside of the windshield wall of the subgrade, causing serious damage.

(2) On the other hand, the windshield is a non-ventilated structure, and the wind-sand flow uses a head-on collision with it, and an area of increased wind speed will be formed above the windshield, which will cause a part of the sand and gravel material to be carried over by the sand-carrying airflow. The windbreak wall, and the downwind direction of the windbreak wall, that is, the position of the track bed and track of the roadbed, causes a large amount of sand accumulation.

(3) Especially in the strong wind area of the Gobi, in addition to the sand and gravel materials, there are also a large number of dust materials with small particle size. These materials are mainly in a suspended state under the action of strong winds, and are easily affected by the increased wind speed on the windshield. Affected and over the windshield, and subsidence in the wind shadow area downwind of the windshield, causing damage to the roadbed and track of the roadbed.

(4) In the sandstorm area, the wind season is mainly distributed in winter and spring. This period is also when the plants are withered. There are a large number of dead weeds and branches in the sandstorm area. These dead weeds and branches are easy to fly with the wind under the action of the strong wind. , and because its shape is relatively loose and its mass is relatively small, it is easy to climb over the windshield and enter the inner side of the windshield, causing harm to railway wires and pantographs.

(5) The single non-ventilation structure adopted by the current windshield wall has a large disturbance to the airflow in the area, especially the inner side of the windshield wall, that is, the position of the roadbed track, forming a large eddy current area, that is, the wind shadow area. , the wind speed and direction in this area are complex, and this will cause potential harm to the safe running of trains, especially for high-speed trains. The wind speed and direction are extremely important to their safe running.

SUMMARY OF THE INVENTION

The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a wind and sand blocking device for sandstorm area, which conforms to the characteristics of near-surface wind sand flow movement, adopts the structure of "sparse upper part and lower density", adopts a blocking part at the bottom, and adopts a blocking mesh part with porosity on the upper part, The top is the intercepting fence with the largest porosity, which can effectively block sand, wind, dust, and weeds, while minimizing the disturbance to the wind and sand flow, ensuring the stability of the local airflow to the greatest extent, and improving the Protective effect on the protected area.

According to the first aspect of the present invention, a wind and sand blocking device for a sandstorm area, the side facing the main wind direction is the windward side, and the side facing away from the main wind direction is the leeward side; the wind and sand blocking device includes: a blocking part and a blocking net portion above the blocking portion and an intercepting fence located on the top of the blocking net portion and extending toward the windward side from the top of the blocking net portion;

The blocking portion includes a plurality of blocking bodies and a fixing column for fixing two adjacent blocking bodies;

The resistance net part includes a plurality of resistance nets and a fixed pillar for fixing two adjacent resistance nets, and the resistance net is installed on the top of the fixed column through the fixed pillars;

The interception fence includes a fixed bracket and an interception net installed on the fixed bracket, the interception net is installed on the side of the fixed column on the windward side through the fixed bracket, and the interception net is connected to the barrier. The net is set at an angle.

According to an embodiment of the present invention, two adjacent blocking bodies are butted together, and the side of the abutment on the windward side is on the same plane, and the fixed column has a connecting surface, and the connecting surface is in close contact with each other. the leeward side of the abutment;

Or, the fixed column is fixed between two adjacent blocking bodies, the side of the fixed column located on the windward side is configured as a blocking plane, and the blocking plane and the two adjacent blocking bodies are located The windward side is in the same plane;

Or, the fixed column is fixed between two adjacent blocking bodies, the side of the fixed column located on the windward side protrudes from the side of the two adjacent blocking bodies located on the windward side, and the fixed column is located on the windward side. The protruding surface is a fluid surface, and the angle between the connection between the side surfaces on the windward side of the two adjacent blocking bodies and the fluid surface is greater than 90 degrees.

According to an embodiment of the present invention, the protruding surface of the fixing column is a circular arc surface or a polygonal surface.

According to an embodiment of the present invention, the fixing uprights are respectively provided with card slots on opposite sides of the blocking plane, one end of two adjacent blocking bodies are respectively butted in the card slots, and the The blocking plane and the side of the two adjacent blocking bodies on the windward side are on the same plane.

According to an embodiment of the present invention, slots are respectively provided on opposite sides of the fixing column on the protruding surface, and one ends of two adjacent blocking bodies are respectively inserted into the slots;

The slot passes through or does not pass through the radial direction of the fixed column.

According to an embodiment of the present invention, the side of the fixed column on the leeward side is a circular arc surface or a polygonal surface.

According to an embodiment of the present invention, the blocking body is a non-ventilated wall or a semi-ventilated wall;

Holes are distributed on the surface of the semi-ventilated wall, and the openings at both ends of the holes are provided with wind-penetrating sand-blocking nets matching the shape of the holes;

The intercepting net includes barbed iron wires arranged side by side and at intervals;

The resistance mesh surface is reinforced by fixing wires that are cross-connected to the fixing posts.

According to an embodiment of the present invention, the included angle between the intercepting net and the blocking net on the windward side is 90-145 degrees;

A supporting frame for supporting the intercepting net is or is not provided below the intercepting net, one end of the supporting frame is connected with the fixing column, and the other end of the supporting frame is connected with the fixing bracket.

According to an embodiment of the present invention, the fixing column is a hollow structure, and a telescopic strut is nested in the fixing column.

According to an embodiment of the second aspect of the present invention, a wind-sand protection system for a subgrade in a sand-storm area includes at least the wind-sand-blocking device for a sand-storm area, which is disposed on the windward side of the subgrade in the sand-storm area.

According to an embodiment of the present invention, the bottom of the fixed column is fixedly connected with a fixed foundation, the bottom of the fixed column is fixed under the ground of the roadbed in the sandstorm area through the fixed foundation, and the sandstorm area is protected by wind and sand. The device is fixed at the road shoulder position of the roadbed in the sandstorm area through the fixed column.

According to an embodiment of the present invention, the wind and sand blocking devices for the wind-sand area are respectively provided on opposite sides of the roadbed in the wind-sand area, and the wind-proof and sand-blocking devices for the wind-sand area located on the windward side of the roadbed in the wind-sand area are: The first wind and sand blocking device, the wind and sand blocking device for the wind and sand area located on the leeward side of the roadbed in the wind and sand area is the second wind and sand blocking device, the first wind and sand blocking device and the second wind and sand blocking device The windward sides of the device are all located outside the roadbed in the sandstorm area.

According to an embodiment of the present invention, the height of the first wind and sand blocking device is higher than the height of the second wind and sand blocking device, and the total height of the second wind and sand blocking device is the same as the first wind and sand blocking device 0.35-0.7 times the total height of the device.

Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the invention.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

1 is a schematic side view of a wind and sand blocking device for a protection zone provided on both sides of a railway subgrade provided by an embodiment of the present invention;

Fig. 2 is the top view schematic diagram of Fig. 1;

Figure 3 is a schematic front view of the wind and sand blocking device used in the protection zone in Figure 1;

4 is a schematic top view of the interception fence of FIG. 1;

5 is a schematic front view of a wind and sand blocking device for a protection area provided by another embodiment of the present invention;

6 is a schematic front view of a wind and sand blocking device for a protection area provided by another embodiment of the present invention;

7 is a schematic front view of a wind and sand blocking device for a protection area provided by still another embodiment of the present invention;

FIG. 8 is a schematic front view of a net blocking part provided by some embodiments of the present invention;

9 is a schematic front view of a wind and sand blocking device for a protection area provided by still another embodiment of the present invention;

10 is a schematic side view of the arrangement of the barbed wire in the interception fence provided by some embodiments of the present invention;

11 is a schematic side view of the arrangement of the barbed wire in the interception fence provided by other embodiments of the present invention;

12 is a schematic side view of the arrangement of the barbed wire in the interception fence provided by further embodiments of the present invention;

13 is a schematic side view of the connection mode of the blocking portion and the blocking mesh portion provided by some embodiments of the present invention;

14 is a schematic side view of the connection mode of the blocking portion and the blocking mesh portion provided by other embodiments of the present invention;

15 is a schematic side view of the connection mode of the blocking portion and the blocking mesh portion provided by further embodiments of the present invention;

FIG. 16 is a schematic side view of the connection mode between the fixed bracket and the fixed column in the interception fence provided by some embodiments of the present invention;

17 is a schematic side view of a fixed bracket connected to a support frame in an interception fence according to some embodiments of the present invention;

FIG. 18 is a schematic plan view of the first embodiment of the fixing column according to the embodiment of the present invention;

19 is a schematic top view of the second embodiment of the fixing column according to the embodiment of the present invention;

20 is a schematic top view of the third embodiment of the fixed column according to the embodiment of the present invention;

21 is a schematic top view of the fourth embodiment of the fixed column according to the embodiment of the present invention;

22 is a schematic top view of the fifth embodiment of the fixed column according to the embodiment of the present invention;

23 is a schematic top view of the sixth embodiment of the fixed column according to the embodiment of the present invention;

24 is a schematic top view of the seventh embodiment of the fixing column according to the embodiment of the present invention;

FIG. 25 is a schematic top view of the eighth embodiment of the fixed column according to the embodiment of the present invention;

FIG. 26 is a schematic top view of the ninth embodiment of the fixed column according to the embodiment of the present invention;

FIG. 27 is a schematic top view of the tenth embodiment of the fixing column according to the embodiment of the present invention;

28 is a schematic top view of the eleventh embodiment of the fixed column according to the embodiment of the present invention;

FIG. 29 is a schematic top view of the twelfth embodiment of the fixing column according to the embodiment of the present invention;

30 is a schematic top view of the thirteenth embodiment of the fixing column according to the embodiment of the present invention;

31 is a schematic top view of the fourteenth embodiment of the fixed column according to the embodiment of the present invention;

32 is a schematic top view of the fifteenth embodiment of the fixed column according to the embodiment of the present invention;

33 is a schematic top view of the sixteenth embodiment of the fixed column according to the embodiment of the present invention;

34 is a schematic top view of the seventeenth embodiment of the fixing column according to the embodiment of the present invention.

Reference number:

100. The first wind and sand blocking device; 200, the second wind and sand blocking device; 1. Fixed column; 2. Blocking part; 20. Blocking body; 3. Blocking net part; 4. Intercepting fence; 5. Roadbed; 6. Track; 7. Train; 8. Fixed foundation; 9. Subgrade plane; 10. Fixed pillar; 11. Resistance net; 12. Fixed wire; 13. Fixed bracket; 14. Barbed wire; 15. Circular hole; 17. Long Bar hole; 18, pole; 19, long hole; 21, standard module; 22, fixed frame; 23, horizontal iron wire; 24, vertical iron wire; 25, right angle cross iron wire; 26, diagonal cross iron wire; 27, the support frame; 28, the upper part of the network.

Detailed ways

The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "portrait", "horizontal", "top", "bottom", "front", "rear", "left", "right" , "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing this Inventive embodiments and simplified descriptions are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

Unless otherwise expressly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection ; can be directly connected or indirectly connected through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present invention in specific situations.

In the embodiments of the present invention, unless otherwise expressly specified and limited, the first feature "above" or "under" the second feature may be in direct contact with the first and second features, or the first and second features pass through the middle indirect contact with the media. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structures, materials, or features are included in at least one example or example of embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

In the first aspect, a wind and sand blocking device for a sandstorm area (referred to as a wind and sand blocking device) provided by the embodiment of the present invention is mainly used for wind and sand prevention and control projects such as roadbeds, and is suitable for roadbeds in sandstorm areas, such as ballast track roadbed, Ballast track subgrade, highway subgrade, etc., are used to protect subgrade and trains from wind and sand hazards, to optimize the performance of subgrade wind and sand resistance devices, and to protect the safety of subgrade and train operation, especially for ballastless track subgrade in the Gobi strong wind area. .

In the second aspect, as shown in FIG. 1 to FIG. 2 , a wind and sand protection system for a subgrade in a sand-storm area provided by an embodiment of the present invention includes the wind-proof and sand-blocking device for the sand-storm area, which is at least disposed on the windward side of the roadbed 5 in the sand-storm area. .

In this embodiment, the windward side, the windward side, and the windward direction are the sides that the main wind passes through first. As shown in the arrow directions in Figs. 1 to 17, the direction indicated by the arrow is the direction in which the main wind flows, that is, the N direction. The leeward side, the leeward side, and the leeward direction are the side that the main wind passes through, that is, the M direction. The inner side and the outer side are relative to the center of the subgrade, the inner side is close to the center of the subgrade, and the outer side is away from the center of the subgrade. For example, the inner side of the subgrade of the first wind and sand blocking device 100 refers to the downwind side of the first wind and sand blocking device 100, that is, the M side. ; The outside of the roadbed of the first wind and sand blocking device 100 refers to the windward side of the first wind and sand blocking device 100, namely the N side; the outside of the roadbed of the second wind and sand blocking device 200 refers to the windward side of the second wind and sand blocking device 200, namely N side; the inner side of the roadbed of the second wind and sand blocking device 200 refers to the downwind side of the wind and sand blocking device 200 , that is, the M side.

According to an embodiment of the present invention, the opposite sides of the roadbed 5 in the sandstorm area are respectively provided with the wind and sand block devices for the sandstorm area, and the height of the wind and sand block devices for the sandstorm area on the windward side is higher than that on the leeward side. The height of the wind and sand blocking device used in the wind and sand area. For ease of description, the wind and sand blocking device for the windward side is called the first wind and sand blocking device 100 , and the wind and sand blocking device for the leeward side is called the second wind and sand blocking device 200 .

The windward sides of the first wind and sand blocking device 100 and the second wind and sand blocking device 200 are both located on the outside of the roadbed 5 in the wind and sand area. As can be seen from FIG. 1 , the first wind and sand blocking device 100 and the second wind and sand blocking device are not considered. The heights of the wind and sand blocking devices 200 are different, and the main structures of the first wind and sand blocking device 100 and the second wind and sand blocking device 200 are symmetrically arranged with respect to the axis of the roadbed 5 .

The first wind and sand blocking device 100 is located on the road shoulder on the windward side of the roadbed. The first wind and sand blocking device 100 includes a fixed column 1 , a blocking part 2 , a net blocking part 3 and an intercepting fence 4 .

The second wind and sand blocking device 200 is located at the leeward side shoulder of the roadbed. The wind and sand blocking device 200 includes a fixed column 1 , a blocking part 2 , a net blocking part 3 and an intercepting fence 4 .

The second wind and sand resistance device 200 is located at the leeward shoulder of the roadbed 5 . The difference between the second wind and sand resistance device 200 and the first wind and sand resistance device 100 is that the height of the blocking portion 2 of the second wind and sand resistance device 200 is 1.5- Between 3m, the height of the blocking net part 3 is 0.45-2.4m, the width of the intercepting fence 4 is 0.5-2.0m, and the extension direction of the intercepting fence 4 is the downwind side of the main wind direction, that is, the M direction.

In some embodiments, the total height of the second wind and sand blocking device 200 is 0.35-0.7 times the total height of the first wind and sand blocking device 100 .

In some embodiments, the first wind and sand resistance device 100 or the second wind and sand resistance device 200 is arranged at a position on the inner side of the subgrade and is 50 cm-2 m away from the position of the slope shoulder.

Optionally, the bottom end of the fixed column 1 is located below the roadbed plane 9, the bottom of the fixed column 1 is fixedly connected with a fixed foundation 8, and the bottom of the fixed column 1 is fixed on the ground of the protection zone through the fixed foundation 8. It is convenient for fast and stable installation of the fixed column 1 .

Specifically, as shown in FIG. 3 to FIG. 8 , the wind and sand blocking device includes: a blocking part 2 and a blocking mesh part 3 arranged above the blocking part 2 ; The top of the blocking net part 3 faces the intercepting fence 4 extending on the windward side.

Further, the blocking part 2 includes a plurality of blocking bodies 20 and a fixed column 1 for fixing two adjacent blocking bodies 20; the blocking part 2 can be a non-ventilated structure or a semi-ventilated structure, so as to play a certain barrier effect.

Further, the blocking net part 3 includes a plurality of blocking nets 11 and a fixing pillar 10 for fixing two adjacent blocking nets 11 . The blocking nets 11 are easily stretched by the fixing pillars 10 to form a blocking net surface, and the blocking net surface can be a plane. , the resistance net 11 is installed on the top of the fixed column 1 through the fixed column 10 , for example, the fixed column 10 can be fixed on the top of the fixed column 1 . That is to say, the blocking body 20 and the blocking net 11 are arranged from bottom to top.

As shown in FIG. 9 , according to an embodiment of the present invention, the fixing column 10 is a hollow structure, and a telescopic strut 18 is nested inside the fixing column 10 . By stretching the top end of the fixed column 10 , the struts 18 can be extended, so as to achieve the purpose of heightening the fixed column 10 , and then the upper network 28 is arranged between the struts 18 . In this way, a structure in which the resisting mesh portion 3 is composed of the lower resisting mesh 11 and the upper resisting mesh 28 is formed. Therefore, when the wind and sand is accumulated to a certain height at the bottom of the wind and sand blocking device, and the wind and sand blocking efficiency of the wind and sand blocking device is reduced, the wind and sand blocking efficiency can be improved by increasing the network.

Further, as shown in FIG. 4 , the intercepting fence 4 includes a fixing bracket 13 and an intercepting net installed on the fixing bracket 13 , and the intercepting net is installed at the position of the fixing pillar 10 through the fixing bracket 13 . The side of the windward side, that is to say, the intercepting net is located on the windward side of the blocking net 11, and the intercepting net and the blocking net 11 are arranged at an angle, that is, the intercepting net and the blocking net 11 are not set up and down, but are sandwiched. corner set.

In this embodiment, since the blocking part 2 is a non-ventilated structure or a semi-ventilated structure, the wind-sand flow will consume a part of the energy on the windward side, and the remaining energy will form a wind speed increase area at the upper position of the blocking part 2. 3 is set in this position, which can intercept sand and effectively reduce the increase of wind speed. Furthermore, the dead grass and dead branches are easy to climb over the blocking net part 3, so the intercepting fence 4 is set on the top of the blocking net part 3, which can effectively intercept the dead grass and dead branches, and prevent the dead grass and dead branches from entering the protection area. damage to the network.

For areas with strong wind and sand activity such as the Gobi windy area, the wind and sand blocking device will form a relatively obvious vortex in the downwind direction, forming an air flow in the opposite direction, and the sand and gravel in the downwind direction of the subgrade will be brought to the subgrade by the vortex air flow, causing the subgrade. A large amount of sand accumulates on the track bed and track, so wind and sand blocking devices are also installed at the leeward shoulder of the roadbed, which can effectively prevent the harm of airflow in the opposite direction.

The embodiment of the present invention conforms to the characteristics of near-surface wind sand flow movement, and adopts a structure of "sparse upper part and dense lower part", the lower part adopts a non-ventilated structure or a semi-ventilated structure, the upper part adopts a ventilation structure with porosity, and the uppermost part is the maximum porosity. The intercepting fence 4 can effectively block sand, wind, dust, and weeds, and at the same time, it can minimize the disturbance to the wind and sand flow, ensure the stability of the local airflow to the greatest extent, and reduce the impact on the safe running of the train. influences.

Specifically, the fixed column 1 may specifically be a concrete or metal structure.

In this embodiment, a plurality of blocking bodies 20 are connected by the fixed column 1 to form a protective wall for blocking wind and sand.

As shown in Figure 18 to Figure 34, the structure of the fixed column 1 is divided into three categories:

The first type, as shown in Fig. 18 to Fig. 20 , two adjacent blocking bodies 20 are butted together, and the side of the abutment on the windward side is on the same plane, and the fixed column 1 has a connecting surface, so The connecting surface is in close contact with the leeward side of the butt joint.

That is to say, the fixed column 1 does not appear on the windward side, but is only arranged on the leeward side. On the windward side, the adjacent blocking bodies 20 are butted to form the same plane, so that the sand will not stay at the plane when passing through the plane. , so that no sand accumulation area will be formed, so that it can play a better protective effect on the protection area.

The fixed column 1 using this arrangement has relatively low requirements on the structure and shape of the fixed column 1, and a fixed column 1 with a suitable shape can be selected according to actual needs. Of course, in order to avoid the formation of a sand accumulation area on the leeward side, the side of the fixed column 1 protruding from the leeward side can be set as a fluid surface, and the side surfaces on the leeward side of the two adjacent blocking bodies 20 are connected to the fluid surface. The included angles at the joints of the surfaces are all greater than 90 degrees. As shown in Figure 18 to Figure 19, the shape of the fluid surface can be an arc surface such as a half circular surface or a half elliptical surface, as shown in Figure 20, it can also be Half a polygonal surface, in order to optimize the structure, each corner of the polygonal surface can be connected by arc surface transition.

In this embodiment, the side of the fixed column 1 protruding from the leeward side is set as the fluid surface, and the included angle between the leeward side of the two adjacent blocking bodies 20 and the connection between the fluid surface is greater than 90 degrees. Therefore, when the wind sand flows through the fluid surface from the blocking body 20, it will not stay at the connecting angle between the fluid surface and the blocking body 20, that is, the wind shadow area will not be formed, so that sand will not accumulate in this area. , and then when the wind sand flows through the fluid surface, it will not stay on the fluid surface, so that the leeward side of the wind and sand blocking device will not form a sand accumulation area in the entire wind sand area.

Of course, in order to facilitate the attachment of the connection surface of the fixing column 1 to the surface of the blocking body 20 on the leeward side, the connection surface is preferably set to be flat.

The second type, as shown in Figures 21 to 26, the fixed column 1 is fixed between two adjacent blocking bodies 20, and the side of the fixed column 1 on the windward side is configured as a blocking plane, so The blocking plane and the side of the two adjacent blocking bodies 20 on the windward side are on the same plane.

That is to say, the blocking plane of the fixed column 1 is on the same plane as the corresponding surfaces of the blocking body 20 located on both sides thereof, similar to the above, so that the sand will not stay at the plane when passing through the plane, and thus will not form The sand accumulation area can play a better protective role in the protection area.

In order to avoid the formation of a sand accumulation area on the leeward side, the side of the fixed column 1 protruding from the leeward side can be set as the fluid surface, and the sides of the two adjacent blocking bodies 20 located on the leeward side and the fluid surface can be set as the fluid surface. The included angles of the joints are all greater than 90 degrees. As shown in Figure 21 to Figure 26, the shape of the fluid surface can be an arc surface such as a half circular surface or a half elliptical surface, or a half polygonal surface. In order to optimize the structure , each corner of the polygonal surface can be connected by the arc surface transition.

In this embodiment, the side of the fixed column 1 protruding from the leeward side is set as the fluid surface, and the included angle between the leeward side of the two adjacent blocking bodies 20 and the connection between the fluid surface is greater than 90 degrees. Therefore, when the wind sand flows through the fluid surface from the blocking body 20, it will not stay at the connecting angle between the fluid surface and the blocking body 20, that is, the wind shadow area will not be formed, so that sand will not accumulate in this area. , and then when the wind sand flows through the fluid surface, it will not stay on the fluid surface, so that the leeward side of the wind and sand blocking device will not form a sand accumulation area in the entire wind sand area.

Further, in order to facilitate the connection between the blocking body 20 and the fixed column 1, according to an embodiment of the present invention, as shown in FIG. 22, FIG. 24, and FIG. 26, the fixed column 1 is located on opposite sides of the blocking plane. A card slot may be provided respectively, one end of the two adjacent blocking bodies 20 are respectively butted in the card slot, and the blocking plane and the side of the two adjacent blocking bodies 20 on the windward side are located. same plane.

Of course, it is also possible to directly connect the blocking body 20 to the fixed column 1 without providing a card slot. The specific form of fixed connection includes, but is not limited to, bonding, which can be selected according to needs.

The third type, as shown in FIGS. 27 to 34 , the fixed column 1 is fixed between two adjacent blocking bodies 20 , and the side of the fixed column 1 on the windward side protrudes from two adjacent blocks 20 . The blocking body 20 is located on the side of the windward side, the protruding surface of the fixed column 1 is a fluid surface, and the angle between the connection between the side of the two adjacent blocking bodies 20 on the windward side and the fluid surface is the same. More than 90 degrees, by setting the included angle to be greater than 90 degrees, it is convenient for the sand to pass through the included angle without forming a wind shadow area, so that the sand flows through the fluid from the blocking body 20 When the wind-blown sand flows through the fluid surface, it will not stay at the connecting angle between the fluid surface and the blocking body 20, so that sand will not accumulate in this area. The windward side of the wind and sand blocking device used in the sandstorm area will not form a sand accumulation area.

According to an embodiment of the present invention, the protruding surface of the fixing column 1 may be a circular arc surface, such as a circular surface or an elliptical surface. The side of the fixed column 1 protruding from the leeward side can also be set as a fluid surface, such as a circular surface or an elliptical surface; thus for the convenience of setting and the optimization of the structure, the cross section of the fixed column 1 can be a complete circle or ellipse One end of two adjacent blocking bodies 20 are respectively set at the radial ends of the circular fixed column 1 or one end of two adjacent blocking bodies 20 are respectively set at both ends of the long axis of the oval fixed column 1 .

According to another embodiment of the present invention, the protruding surface of the fixed column 1 is a polygonal surface, and the side of the fixed column 1 protruding from the leeward side can also be a polygonal surface, so the fixed column 1 can be set as a complete polygon, For example hexagon.

Further, in order to facilitate the connection between the blocking body 20 and the fixing column 1, according to an embodiment of the present invention, the fixing column 1 is respectively provided with slots on opposite sides of the protruding surface, and two adjacent blocking bodies are provided with slots. One ends of the 20 are respectively inserted into the slots.

According to an embodiment of the present invention, the slot passes through or does not pass through the radial direction of the fixed column 1, as shown in Figure 29, Figure 31, Figure 34, when the slot passes through the fixed column 1, two adjacent One end of the blocking body 20 can be butted in the slot, and the connection is stable. As shown in FIG. 28 , FIG. 30 , and FIG. 33 , when the slot does not penetrate through the fixed column 1 , the slot is a gap formed on both radial sides of the fixed column 1 respectively. The shape of the notch matches the shape of the end of the blocking body 20 , for example, both are rectangular.

In the above technical solution, several structures for fixing the column 1 and ways of connecting with the blocking body 20 are proposed according to the principle of fluid mechanics. Since the structure of the side (ie N side) of the fixed column 1 close to the inner side of the roadbed will produce resistance to the fluid, especially the fast running of the high-speed train will generate a strong instantaneous air flow parallel to the direction of the train, and this airflow will have a negative effect on the fixed column 1. A pressure, and because the fixed column 1 is distributed more, its reaction will produce resistance to the airflow. If the resistance is large to a certain extent, it will affect the speed and safety of the train. Therefore, the technical solution proposes several fixed uprights 1 that have the function of hydrodynamics, which have a relatively smooth fluid surface, which can greatly reduce the resistance and promote the fast and safe running of the train. On the other hand, it has a hydrodynamic structure, which greatly reduces the wind shadow area formed by the fixed column 1 , and can avoid the phenomenon of sand accumulation near the fixed column 1 . In the third aspect, the fluid structure of the fixed column 1 can greatly reduce the impact of the strong airflow generated in the fast running of the train and the column to produce sound barriers, thereby having less impact on the train driver and passengers' hearing.

In this embodiment, the blocking body 20 is a non-ventilated wall or a semi-ventilated wall.

The non-ventilated wall can be, for example, a solid wall made of concrete or a metal structure.

Specifically, the blocking body 20 can also be formed by combining standard modules 21 cast with concrete, or can be a monolithic structure, which can be flexibly adjusted according to actual needs.

The height of the blocking part 2 is H1, which is determined according to the intensity of the sandstorm in the sandstorm area, which is both differentiated and targeted. Further, the height H1 of the blocking portion 2 is 3.7m≤H1≤4.5m. The height of the resistance net 11 is H2, 1.11m≤H2≤3.6m. The width of the intercepting fence 4 is L, and 0.5m≤L≤2.0m.

In some embodiments, the height of the blocking portion 2 is H1, 1.5m≤H1<3.7m. The height of the resistance net 11 is H2, 0.5m≤H2<1.11m. The width of the intercepting fence 4 is L, and 0.5m≤L≤2.0m.

The thickness of the blocking portion 2 is 5-20 cm. The length is the distance between the two fixed columns 1, which is 2.5m-7m.

If the standard module 21 is cast with concrete, in some embodiments, the width of the standard module 21 is 40cm˜80cm. The length of the standard module 21 is 3 m to 7 m. The thickness of the standard module 21 is 10 cm to 25 cm. The blocking portion 2 can be assembled from a plurality of standard modules 21 .

The bottom of the blocking portion 2 is in close contact with the subgrade plane 9 without leaving a gap. In some embodiments, the joint between the bottom of the blocking portion 2 and the subgrade plane 9 is bonded by concrete or sealant.

In some embodiments, the bottom of the blocking portion 2 is embedded in the subgrade by 5-10 cm. In this case, a groove corresponding to the blocking portion 2 needs to be provided on the subgrade in advance.

In this embodiment, holes are distributed on the surface of the semi-ventilated wall, and the openings at both ends of the holes are provided with wind-proof sand-blocking nets (not shown in the figure) matching the shape of the holes. As shown in FIG. 5 , the holes may be circular holes 15 , and as shown in FIGS. 6 to 7 , or elongated holes 17 and 19 . The surface of the windproof sand mesh is a mesh structure, which is a mesh structure formed by metal wires. The wind-ventilating sand-blocking net can be disassembled, and it is fixed at the opening of the hole by means of screws or buckles. By setting the wind-proof sand-blocking net, the sand can be filtered out by letting the wind pass through, so as to minimize the sand passing through the holes and entering the protection area.

As shown in FIG. 6 , for the elongated holes 17 , only one can be arranged in each row. As shown in FIG. 7 , for the elongated holes 19 , multiple elongated holes 19 can be arranged at intervals in each row. length is determined.

In this embodiment, the intercepting net includes barbed iron wires 14 that can be arranged side by side and at intervals; the fixing bracket 13 is fixed on the fixing column 10 and is perpendicular to the fixing column 10 and is located on the windward side of the fixing column 10, or the outer side of the roadbed, namely N Towards. The number of barbed iron wires 14 can be set to 4-15, and the interval is 3-10cm. By arranging the barbed wire 14, the dead grass can be well intercepted.

The use of the intercepting fence 4 can effectively intercept withered grass and dead branches and plastic bags flying with the wind. In the sandstorm area, the wind season is mainly distributed in winter and spring. This period is also when the plants are withered. There are a large number of dead weeds and branches in the sandstorm area. Its shape is relatively loose and its mass is relatively small, so it is easy to climb over the windshield and enter the inner side of the windshield, causing harm to railway wires and pantographs. On the other hand, because in the windy season, the northwest sandy area is when everything is depleted, and a large amount of construction waste (such as sunshade nets, geotextiles, etc.), household waste (plastic bags, plastic sheets, etc.) There are also some garbage (plastic bags, instant noodle boxes, etc.) thrown away by passengers along the line itself. These garbage items are easy to fly with the wind, and it is easy to climb over the windshield (wind and sand blocking device) and enter the inner side of the roadbed, especially for railway wires, The pantograph is hazardous and prone to short circuits and fires. However, the intercepting fence 4 used in this embodiment can intercept these items in a targeted manner, thereby effectively preventing them from entering the inner side of the railway subgrade 5 and protecting the safety of railway electrified operation.

In order to stabilize the blocking net 11 , the surface of the blocking net 11 is reinforced by the fixing iron wires 12 which are cross-connected to the fixing pillars 10 . The fixed iron wire 12 is fixed between the fixed pillars 10 , and the two ends of the resistance net 11 are fixed on the fixed pillar 10 . The use of the blocking net 11 means the use of a ventilated mesh structure. During the fast running of the train, the air pressure on the blocking part 2 increases rapidly, and the ventilated mesh structure can make the air flow out, so as to alleviate the rapid increase in air pressure and reduce the pressure on the blocking part 2. train safety impact.

In addition, the mesh structure with the ventilation structure adopted by the net blocking part 3 has less influence on the lighting inside the roadbed 5, and has less visual impact on the train and train passengers.

In addition, the fixed column 10 can be made of metal material, and can be a cylindrical or square column structure, the lower end of which is fixed on the top of the fixed column 1 . Holes or bolts are provided on both sides of the fixing pillar 10 parallel to the direction of the resistance net 11 for fixing the resistance net 11 and the fixing iron wire 12 .

Optionally, the height of the fixing pillar 10 is 5-10 cm higher than the height H2 of the blocking net 11 , which facilitates the installation and fixing of the blocking fence 4 .

The fixed iron wire 12 is provided with two horizontal iron wires at the upper and lower ends, and two intersecting iron wires are arranged in the middle. The fixed iron wire 12 can be a plastic-skin galvanized iron wire.

Furthermore, the blocking net 11 and the fixed iron wire 12 are fixed by a plastic-skin iron wire tie.

Preferably, the anti-sand net 11 is a sand-proof net with a flat mesh structure, which can be made of chemical new materials or metal materials, specifically high-density polyethylene (HDPE), polyethylene (PE), nylon (Nylon) or metal. Mesh and other materials, the porosity is 40-70%. A flat mesh structure made by plain weaving or knitting.

In some embodiments, the blocking net 11 can be a windproof and dust-suppressing net, or a punching net or a punching plate.

According to an embodiment of the present invention, as shown in FIG. 16 to FIG. 17 , the included angle between the intercepting net and the blocking net 11 on the windward side is 90-145 degrees.

As shown in FIG. 17 , a support frame 27 for supporting the interception net is or is not provided below the intercepting net. One end of the support frame 27 is connected to the fixing column 10 , and the other end of the support frame 27 is connected to the fixing column 10 . One end is connected to the fixing bracket 13 . When the support frame 27 is provided, the support frame 27, the fixed bracket 13 and the fixed support column 10 form a triangular structure, which has structural and mechanical stability.

In this embodiment, the blocking part 3 is located above the blocking part 2, which can consume wind energy, block sand and dust, and effectively reduce the wind speed increase area formed above the blocking part 2. ” structure, the porosity of the upper blocking part 3 is greater than the porosity of the lower blocking part 2, such a structure can minimize the disturbance to the surrounding airflow. The wind shadow area formed on the inner side of the roadbed 5 by the wind and sand blocking device is further reduced, so as to minimize the airflow disturbance on the inner side of the roadbed 5 and minimize the influence on the running of the train.

In another embodiment, the fixed column 10 and the fixed column 1 can be integrally formed to form an integrated structure, that is, the fixed column 1 can be directly increased, and is 5-10 cm higher than the resistance net 11, so that the resistance net 11 and the interception fence 4 are both. It can be installed on the fixed column 1.

In some embodiments, instead of the fixed iron wire 12, the fixed frame 22 is used in the blocking part 3. The structure of the fixed frame 22 includes: a rectangular frame, a vertical frame is arranged in the middle of the frame, and the frame is divided into left and right rectangles The top of the tight straight frame is set up with an inclined frame respectively to the opposite corners of the two sides of the straight frame. The frame structure can make the whole rectangular frame form four triangles of equal size, which is beneficial to the uniform force.

The fixed frame 22 is fixed at the contact point with the fixed column 1 , preferably, it is fixed with screws, buckles, etc., which is convenient for installation and disassembly.

Further, the blocking net 11 is fixed on the fixed frame 22 . In order to increase the stability of the blocking net 11 , the blocking net 11 and the fixing frame 22 are fixed by a plastic-skin wire tie.

In some embodiments, according to the sand intensity of the sandstorm area, if the sandstorm is strong, in order to better protect the blocking net 11, as shown in FIG. The crossed iron wire 25 or the diagonal crossed iron wire 26 is worked hard, and then the resistance net 11 is fixed on the fixed frame 22 and the iron wire (23, 24, 25, 26); it can be set flexibly according to the actual situation.

In the above-mentioned embodiment, the proposed fixed frame 22 structure, this structure conforms to the principle of structural mechanics, the force is uniform, relatively stable and reliable, and the use of this structure is convenient for mechanical construction, and the blocking part 3 is stronger, especially suitable for major projects such as railways. superior.

In addition, the barbed wire 14 in the interception fence 4 is parallel to the resistance net 11, and is set at 4-15, with an interval of 3-10 cm.

Referring to FIG. 10 , in some experimental examples, the barbed iron wires 14 are arranged horizontally, and several of them are located on the same horizontal plane.

Referring to FIG. 11 , in some embodiments, the barbed wire 14 is set horizontally except for the outermost barbed wire 14 , and the outermost barbed wire 14 is set 10-30cm lower than the horizontal plane of the inner barbed wire 14 .

In some embodiments, the outermost 2-3 barbed wires 14 are arranged horizontally except for the outermost 2-3 barbed wires 14, and the outermost 2-3 barbed wires 14 are arranged 10-30 cm lower than the horizontal surface of the inner barbed wires 14.

Referring to FIG. 12 , in some embodiments, the barbed iron wires 14 are not arranged on the same horizontal plane, the intervals are staggered, the height difference between two adjacent ones is 5-15 cm, and one of the two adjacent ones is above the average horizontal plane and the other is below the average horizontal plane. .

Referring to FIG. 13 , in some embodiments, the top of the blocking part 2 is a right-angled rectangle, and the side plane of the blocking part 3 close to the roadbed track is on the same plane as the inner plane of the blocking part 2 , forming a whole plane. The bottom of the blocking part 3 is connected to the inner side of the blocking part 2 at a right angle.

Referring to FIG. 14 , in some embodiments, the outer side of the top of the blocking part 2 is provided with a beveled edge, so that the top forms a sharp angle, and the sharp angle is β, 5°≤β≤60°, and the optimum is 30°. The side plane of the blocking part 3 close to the roadbed and the inner plane of the blocking part 2 are located on the same plane, forming a whole plane. The bottom of the blocking part 3 is connected with the sharp corners of the blocking part 2 .

Referring to FIG. 15 , in some embodiments, the top of the blocking portion 2 is an equilateral triangle, and the top forms a sharp angle γ, 10°≤γ≤120°, and the optimum is 60°. The bottom of the blocking part 3 is connected with the sharp corners of the blocking part 2 .

In the above technical solution, the way that the blocking part 3 is connected with the blocking part 2 is in line with the laws of fluid mechanics. The overall plane can minimize the resistance to the airflow generated by the train running, and protect the safe running of the train. On the other hand, this can also reduce the pressure of the air flow generated by the running of the train on the screen blocking part 3 , which in turn protects the service life of the blocking screen part 3 .

Further, in the above-mentioned technical solution, the outer side of the top of the proposed blocking portion 2 has a beveled edge, so that the top has a sharp corner, and this setting can land the sand and dust intercepted by the blocking portion 3 on the windward side along this beveled edge. On one side, and because the inclination angle of the hypotenuse is relatively large, which is much larger than the angle of repose of the sand material by 30°, the sand material and dust can basically slide down, which can greatly prevent it from settling on the hypotenuse. And basically it will slide down the oblique side and then accumulate at the bottom of the blocking part, next to the blocking part, without falling too far, which also greatly ensures the stability of the sand body formed by the wind and sand blocking device, and avoids secondary uplift. Sand, but also easy to clean up sand.

In this embodiment, the adopted first wind and sand blocking device 100 is located at the road shoulder on the windward side of the roadbed 5, which is the area with the maximum wind speed of the roadbed, and being located there can effectively block the wind and sand flow to protect the inner side of the roadbed, and intercept the sand material at Outside the shoulder of the road, the wind energy is greatly reduced, which protects the safety of the train.

In addition, as shown in FIG. 1 to FIG. 2 , it is proposed that the second wind and sand blocking device 200 is located at the position of the road shoulder on the leeward side of the roadbed 5 . In the sandstorm area, due to the disturbance to the airflow caused by the wind and sand blocking measures such as the windshield wall in the upwind direction, the wind shadow area of the subgrade and the downwind direction of the subgrade is formed. The airflow vortex will form an airflow in the opposite direction of the main wind direction, so that the sand and dust such as gravel in the downwind direction of the roadbed will be brought to the roadbed by the vortex airflow, resulting in a large amount of sand accumulation on the track bed, track 6 and the inside of the windshield of the roadbed, and It has a direct impact on the safe running of train 7. On the other hand, the airflow in the wind shadow area is in a turbulent state, and the airflow is disordered and random, which causes unpredictable safety hazards for the operation of fast-moving trains on the roadbed. The second wind and sand blocking device 200 provided by this technical solution is located at the road shoulder on the leeward side of the roadbed. The swirl flow effectively relieves the formation of turbulence. Thus protecting the roadbed and the safe operation of trains.

In some embodiments, the first wind and sand blocking device 100 and the second wind and sand blocking device 200 provided by the present invention can be used independently. Further, it can be used in combination with other wind and sand blocking devices. For example, if other wind and sand blocking devices have been installed on the windward side of the roadbed, and the existing wind and sand blocking devices cannot be changed or removed, it can be used only on the leeward side of the roadbed. Only the second row of wind and sand blocking devices 200 is provided at the shoulder position, so that the second wind and sand blocking devices 200 can be combined with the existing wind and sand blocking devices.

In some embodiments, especially when applied to road subgrades, according to the intensity of wind and sand activity, only the first wind and sand blocking device 100 in the wind direction above the subgrade 5 may be provided.

In some embodiments, the first wind and sand blocking device 100 and the second wind and sand blocking device 200 provided by the present invention are not limited to roadbed wind and sand prevention and control projects, but can be applied to other wind and sand prevention and control projects, such as: sand dunes, Gobi, desert projects In the sand control project in the district and other regions.

According to the principles of the wind and sand blocking devices 100 and 200 of the present embodiment, the forms of sand accumulation formed by them are also different. The sand accumulation of the wind and sand blocking device 200 is formed on the leeward side, that is, the M side. In addition, the sand accumulation of the first wind and sand blocking device 100 is much larger than that of the second wind and sand blocking device 200. Therefore, the maintenance of the wind and sand blocking device is the first wind and sand blocking device 100, and the accumulation of the first wind and sand blocking device 100 needs to be cleaned regularly. sand.

The above technical solution, based on the characteristics and actual conditions of the sandstorm disaster of the subgrade in the sandstorm area, proposes the first wind and sand blocking device 100 and the second wind and sand blocking device 200 according to local conditions, which have obvious protective effects and can fully protect the roadbed and train operation safety in the sandstorm area. .

The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that various combinations, modifications or equivalent replacements to the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should cover within the scope of the claims of the present invention.

Claims (14)

1. A wind-proof and sand-blocking device for a wind-sand area is characterized in that one side facing a main wind direction is a windward side, and the side back to the main wind direction is a leeward side; it is characterized in that the wind and sand prevention device comprises: the blocking part, the net blocking part arranged above the blocking part and the intercepting fence are positioned at the top of the net blocking part and extend from the top of the net blocking part to the windward side;

the blocking part comprises a plurality of blocking bodies and fixing upright posts for fixing two adjacent blocking bodies;

the net blocking part comprises a plurality of net blocking parts and a fixing strut for fixing two adjacent net blocking parts, and the net blocking parts are arranged at the tops of the fixing struts;

the intercepting fence comprises a fixed support and an intercepting net installed on the fixed support, the intercepting net passes through the fixed support is installed on one side, located on the windward side, of the fixed support, and the intercepting net and the blocking net are arranged in an included angle mode.

2. The wind and sand prevention device for the wind and sand areas according to claim 1, wherein two adjacent blocking bodies are butted, one side of the butted joint on the windward side is on the same plane, the fixed upright post is provided with a connecting surface, and the connecting surface is tightly attached to one side of the butted joint on the leeward side;

or the fixed upright post is fixed between two adjacent blocking bodies, one side of the fixed upright post, which is positioned on the windward side, is constructed into a blocking plane, and the blocking plane and one side of the two adjacent blocking bodies, which is positioned on the windward side, are positioned on the same plane;

or, the fixed stand column is fixed between two adjacent blocking bodies, one side of the fixed stand column, which is positioned on the windward side, protrudes out of two adjacent blocking bodies, which are positioned on the windward side, the protruding surface of the fixed stand column is a fluid surface, and the included angles of the connecting positions of the two adjacent blocking bodies, which are positioned on the windward side, and the fluid surface are both larger than 90 degrees.

3. The wind and sand prevention device for wind and sand areas according to claim 2, wherein the protruded surface of the fixed post is a circular arc surface or a polygonal surface.

4. The wind and sand prevention device for the wind and sand areas according to claim 2, wherein the fixed columns are respectively provided with a clamping groove at two opposite sides of the blocking plane, one end of each of two adjacent blocking bodies is respectively butted in the clamping groove, and the blocking plane and one side of each of two adjacent blocking bodies at the windward side are in the same plane.

5. The wind and sand prevention device for the wind and sand area according to claim 2, wherein the fixed upright posts are provided with slots at opposite sides of the protruding surface, and one end of each of two adjacent blocking bodies is inserted into the slot;

the slot is through or not through the radial direction of the fixed upright post.

6. A wind and sand prevention device for wind and sand areas according to any one of claims 1 to 5, wherein said fixed columns are formed in a circular arc shape or a polygonal shape on the leeward side.

7. The wind and sand prevention device for the wind and sand area according to any one of claims 1 to 5, wherein the blocking body is a non-wind permeable wall body or a semi-wind permeable wall body;

holes are distributed on the surface of the semi-ventilation wall body, and ventilation sand blocking nets matched with the holes in shape are arranged at openings at two ends of each hole.

8. The wind and sand prevention device for the wind and sand areas according to any one of claims 1 to 5, wherein the intercepting net comprises a plurality of barbed wires arranged at intervals, a plurality of the barbed wires are arranged side by side, or at least one of the barbed wires is arranged in a staggered manner;

the surface of the screen is reinforced by fixing wires cross-connected to the fixing posts.

9. The wind and sand prevention device for the wind and sand areas according to any one of claims 1 to 5, wherein the included angle between the intercepting net and the wind resistance net on the windward side is 90 to 145 degrees;

the supporting frame is arranged below the intercepting net or not, one end of the supporting frame is connected with the fixed support, and the other end of the supporting frame is connected with the fixed support.

10. A wind and sand prevention device for wind and sand areas according to any one of claims 1 to 5, wherein said fixed support is a hollow structure, and a telescopic strut is nested in said fixed support.

11. A wind and sand protection system for a roadbed in a wind and sand area, comprising the wind and sand prevention device for a wind and sand area according to any one of claims 1 to 10 provided at least on the windward side of the roadbed in the wind and sand area.

12. The wind and sand protection system of the wind and sand area subgrade according to claim 11, wherein the bottom of the fixed upright post is fixedly connected with a fixed foundation, the bottom of the fixed upright post is fixed under the ground of the wind and sand area subgrade through the fixed foundation, and the wind and sand prevention device for the wind and sand area is fixed at the shoulder position of the wind and sand area subgrade through the fixed upright post.

13. The wind and sand protection system of claim 11, wherein said wind and sand prevention device is disposed on each of two opposite sides of said wind and sand area subgrade, said wind and sand prevention device is a first wind and sand prevention device on the windward side of said wind and sand area subgrade, said wind and sand prevention device is a second wind and sand prevention device on the leeward side of said wind and sand area subgrade, and the windward sides of said first wind and sand prevention device and said second wind and sand prevention device are both disposed on the outer side of said wind and sand area subgrade.

14. The wind and sand protection system of a roadbed in a wind and sand area of claim 13, wherein the height of the first wind and sand prevention device is higher than that of the second wind and sand prevention device, and the total height of the second wind and sand prevention device is 0.35-0.7 times of that of the first wind and sand prevention device.

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