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CN-121976514-A - Active turbulence type sand blocking system

CN121976514ACN 121976514 ACN121976514 ACN 121976514ACN-121976514-A

Abstract

The application discloses an active turbulence type sand blocking system. The active turbulence type sand blocking system comprises a first turbulence band, wherein the first turbulence band comprises a plurality of first support columns, first cable nets and first wind resistance plates, the first support columns are arranged in a plurality of rows and distributed at intervals, the first cable nets are connected between every two adjacent first support columns, the first wind resistance plates are arranged on each row of the first cable nets, and the first wind resistance plates on each row of the first cable nets are distributed at intervals between the adjacent first support columns. The active turbulence type sand blocking system utilizes point vortex formed at each wind resistance plate to construct and form a turbulence field, and utilizes the turbulence field to realize active turbulence on the wind and sand flow, so as to realize macroscopic orderly efficient dissipation of kinetic energy on the wind and sand flow and realize the purposes of effective interception and sedimentation.

Inventors

  • ZHANG KUN
  • YANG FAN
  • ZHANG BORUI

Assignees

  • 中建三局集团有限公司

Dates

Publication Date
20260505
Application Date
20260330

Claims (11)

  1. 1. An active turbulence type sand blocking system is characterized by comprising a first turbulence band (1), wherein the first turbulence band (1) comprises a first support column (111), a first cable net (112) and a first wind resistance plate (113); the first support columns (111) are provided with a plurality of support columns which are arranged side by side in a plurality of rows and are distributed at intervals; the first cable net (112) is connected between each row of adjacent first support columns (111); A plurality of first wind resistance plates (113) are arranged on each row of the first cable nets (112), and the plurality of first wind resistance plates (113) on each row of the first cable nets (112) are distributed at intervals between adjacent first support columns (111).
  2. 2. The active turbulence type sand blocking system according to claim 1, wherein the lower edges of the first wind resistance plates (113) in the same row are equal in ground clearance, the adjacent two rows of the first wind resistance plates (113) are distributed in a staggered mode in a horizontal projection direction perpendicular to the row direction, and the distance between the adjacent first wind resistance plates (113) on the same first cable net (112) is 0.5-0.8 times of the width of the first wind resistance plates (113).
  3. 3. The active turbulence type sand blocking system according to claim 2, wherein two sides of the first turbulence band (1) are respectively set to be a windward side and a leeward side, the first turbulence band (1) is divided into at least two target areas from the windward side to the leeward side, the lower edge ground clearance heights of the first wind resistance plates (113) in the same target area are equal, and the lower edge ground clearance heights of the first wind resistance plates (113) in different target areas are increased in a step shape from the windward side to the leeward side.
  4. 4. The active turbulence type sand blocking system according to claim 1, wherein a plurality of first support columns (111) located at the periphery of the first turbulence band (1) are connected with first stay cables (114), the first stay cables (114) are anchored on the ground after being stretched, and a plurality of first peripheral wind resistance plates (1141) distributed at intervals are arranged on the first stay cables (114) along the length direction of the first stay cables.
  5. 5. The active turbulence type sand blocking system according to claim 1, further comprising a second turbulence band (2), wherein two sides of the first turbulence band (1) are respectively set to a windward side and a leeward side, the second turbulence band (2) is arranged on the leeward side of the first turbulence band (1) at intervals, the second turbulence band (2) comprises a plurality of second support columns (21), second rope nets (22) and second wind resistance plates (23), the second support columns (21) are arranged at intervals in parallel, the second rope nets (22) are arranged at intervals in a plurality of rows and between every two adjacent second support columns (21), a plurality of second wind resistance plates (23) are arranged on each second rope net (22), and the second wind resistance plates (23) on each second rope net (22) are distributed between every two adjacent second support columns (21) at intervals.
  6. 6. The active turbulence type sand blocking system according to claim 5, wherein the lower edges of the first wind resistance plates (113) of the same row are equal in ground clearance, the lower edges of the second wind resistance plates (23) of the same column are equal in ground clearance, the adjacent two rows of the first wind resistance plates (113) are staggered in a horizontal projection direction perpendicular to the row direction, the adjacent two rows of the second wind resistance plates (23) are staggered in a horizontal projection direction perpendicular to the row direction, the adjacent two columns of the second wind resistance plates (23) are staggered in a horizontal projection direction perpendicular to the column direction, and the interval between the adjacent second wind resistance plates (23) of the same second cable network (22) is 0.5-0.8 times the width of the second wind resistance plates (23).
  7. 7. The active spoiler sand blocking system according to claim 5, wherein the lower edge of the first wind resistance plate (113) is lower from ground than the lower edge of the second wind resistance plate (23).
  8. 8. The active turbulence type sand blocking system according to claim 7, wherein the first turbulence band (1) is sequentially provided with a low empty area and a hollow area from the windward side to the leeward side, and the lower edge of the first wind resistance plate (113) in the low empty area is lower than the lower edge of the first wind resistance plate (113) in the hollow area.
  9. 9. The active turbulence type sand blocking system according to claim 8, wherein a distance between two adjacent rows of the first wind resistance plates (113) is Lr and 3m is Lr, a row distance and a column distance of the second support columns (21) are Lr 'and 2m is Lr', a lower edge ground clearance height of the first wind resistance plates (113) in the low empty area is h 1 and h 1 is 0.1m, a lower edge ground clearance height of the first wind resistance plates (113) in the empty area is h 2 and h 2 is 0.5m, and a lower edge ground clearance height of the second wind resistance plates (23) is h 3 and h 3 is 0.8m.
  10. 10. Active turbulence type sand control system according to any of claims 5-9, characterized in that each second support column (21) located at the periphery of the second turbulence band (2) is connected with a second stay cable (24), the second stay cable (24) is anchored to the ground after being stretched, and a plurality of second peripheral wind resistance plates distributed at intervals are arranged on the second stay cable (24) along the length direction thereof.
  11. 11. Active turbulence type sand control system according to claim 10, characterized in that the intermediate section of all the second stay cables (24) is connected with at least one restraining cable (3) horizontally encircling the circumference of the second turbulence band (2).

Description

Active turbulence type sand blocking system Technical Field The application relates to the technical field of sand storm disaster prevention and control, in particular to an active turbulence type sand blocking system. Background The control of wind sand disasters is a key link of ecological environment protection and major engineering construction in arid and semiarid regions. Currently, the main stream sand fixation and blocking technology in engineering practice mainly forms two kinds of technical paths, namely 1. The surface covering sand fixation technology (represented by 'grass square') is characterized in that the technology forms a continuous square or strip cover by paving materials such as wheat straw, reed and the like on the surface of sand. The core mechanism is to obviously increase the surface roughness, and directly dissipate wind energy by utilizing the friction action close to the ground, so as to fix surface sand grains and inhibit wind erosion. The grass square lattice technology is mature, the materials are easy to obtain, and the grass square lattice technology is widely applied to the aspect of sand source fixation. However, the method has inherent limitations that the action dimension is single, the influence height is extremely low, the method is generally limited to a thin layer of a few centimeters to more than ten centimeters above the ground surface, the influence on the high-altitude sand conveying airflow is weak, the method does not have space three-dimensional protection capability, the non-active protection depth is strictly limited to a paving area, and the protection effect is strictly limited to the paving area, so that the extension benefit of wind speed attenuation or sand conveying inhibition is hardly generated in a downwind area. If the rear target is to be protected, the near-full-field coverage type paving is required, the materials and engineering amount are huge, the durability and maintenance problems and the natural materials are easy to rot, the natural materials are required to be periodically supplemented, the natural materials are easy to be eroded and damaged in a strong wind area, and the long-term maintenance cost is high. 2. The technology can directly intercept wind and sand flow in vertical space through a barrier structure arranged on the ground. According to the structural characteristics, the technology can be further divided into a physical blocking type sand barrier (such as a wind screen wall and a fence plate), and the technology relies on the physical structure rigidity blocking, and has the defects that a sand blocking mechanism is passive and is easy to lose efficacy due to sand burial, and the bottom of the barrier is easy to undercut, a ventilation structural type sand barrier (such as various wind screens/cloth) and a high vertical type sand barrier form which is widely applied at present are adopted, and wind pressure is reduced and lee vortex settlement is promoted through the ventilation effect of meshes. However, the wind turbine is still a regular and passive ventilation structure in nature, the air flow is easy to form a stable channel, the turbulence efficiency is limited, the density is often required to be increased for improving the effect, the cost is increased, the wind load is increased, and the adaptability to the terrain and the wind direction is poor. Based on the above-mentioned problems with single sand barrier forms, some composite sand barrier structures have been developed in the prior art. For example, the patent CN213538929U combines the grass square with the salix psammophila in front and back, which can improve the sand blocking effect to a certain extent, but the CN213538929U is a combination of passive sand blocking mechanism, and still has the problems of easy sand accumulation, limited application scene and the like. The patent CN118756684A proposes to construct a horizontal and vertical composite structure by a tiled straw sand barrier and a vertical straw fixed pile, but the horizontal and vertical composite structure is still limited to static laying and passive blocking of traditional materials, and does not realize high-efficiency active dissipation of wind and sand flow energy, and has obvious limitations in wind resistance level, durability and adaptation to complex wind fields. In summary, the prior art does not break through the traditional paradigm of passive interception or static turbulence, whether in a single form or a simple composite form, and has significant shortcomings in the aspects of initiative of a protection mechanism, high efficiency of spatial turbulence, flexibility of scene adaptation and the like. Disclosure of Invention The embodiment of the application provides a turbulent flow type sand blocking unit and a turbulent flow type sand blocking system, which are used for solving the problems of the existing sand disaster prevention and control technology, such as initiative of a pr