CN-121992765-A - Construction method of desert highway composite sand prevention system

CN121992765ACN 121992765 ACN121992765 ACN 121992765ACN-121992765-A

Abstract

The invention discloses a construction method of a desert highway composite sand control system, which belongs to the technical field of desert highway sand control and comprises the following steps of measuring and paying off sand on two sides of a roadbed, laying a composite system consisting of grass square sand barriers and a high vertical sand barrier, laying reed soaked by a biological-based sand-fixing agent to form the grass square sand barriers, pressing the reed into the sand layers, laying the high vertical sand barriers outside the grass square sand barriers, arranging the high vertical sand barriers by adopting reed bundle sand barriers and PE nylon net sand barriers in a combined mode at intervals, wherein the surface of the PE nylon net is coated with an ultraviolet-resistant composite coating, the high vertical sand barriers take wood piles as upright posts, wind speed sensors and wind erosion flux sensors are arranged at the tops of the wood piles, and a fireproof isolation belt filled with flame-retardant ecological carpets is arranged along the direction of a road during construction. The invention forms a multi-layer and three-dimensional wind-proof sand-fixation structure through the composite arrangement of the grass square sand barriers and the high-standing sand barriers, effectively reduces the near-surface wind speed, inhibits the starting and the migration of sand grains, and remarkably improves the integral wind erosion resistance of the system.

Inventors

CHENG JIANJUN
WAN WEI
YU LIMING
WANG HUI

Assignees

石河子大学

Dates

Publication Date: 20260508
Application Date: 20260213

Claims (10)

1. The construction method of the desert highway composite sand prevention system is characterized by comprising the following steps of: S1, measuring and paying off on sand on two sides of a roadbed, and laying a composite system consisting of grass square sand barriers and high-standing sand barriers; s2, paving annual reed soaked by the biological-based sand-fixing agent to form a grass square sand barrier with the size of 1m multiplied by 1m, and pressing the reed into a sand layer by 15-20cm, wherein the dosage of the reed per square meter is not less than 1.2kg; S3, arranging a high-standing sand barrier outside the grass square sand barrier, wherein the high-standing sand barrier is formed by combining reed bundle sand barriers and PE nylon net sand barriers at intervals, and the surface of the PE nylon net is coated with an ultraviolet-resistant composite coating; S4, taking a wood pile as an upright post, wherein the pile distance is 3m, the burial depth is not less than 70cm, and a wind speed sensor and a wind erosion flux sensor are arranged at the top of the wood pile; S5, during construction, a fireproof isolation belt filled with a flame-retardant ecological blanket is arranged along the route direction at intervals of 300 m.
2. The construction method of the desert highway composite sand control system according to claim 1, wherein in the step S2, the bio-based sand fixing agent comprises vegetable gum, humic acid and microbial agent, and a moisturizing and corrosion preventing layer is formed on the surface of the reed after soaking.
3. The construction method of the desert highway composite sand control system according to claim 1, wherein in the step S2, the grass square sand barriers are laid out in a multi-scale grid mode, wherein 0.5m multiplied by 0.5m dense grids are adopted in the adjacent roadbed area, and the grass square sand barriers are transited to 1.5m multiplied by 1.5m sparse grids.
4. The construction method of the desert highway composite sand control system according to claim 1, wherein in the step S3, the ultraviolet-resistant composite coating of the PE nylon net is a polyurethane modified acrylic ester coating doped with nano silicon dioxide particles.
5. The construction method of the desert highway composite sand control system according to claim 1, wherein in the step S3, a sand guiding fence with an adjustable inclination angle is additionally arranged at the outermost side of the high-rise sand barrier, and the fence angle can be adjusted seasonally according to the dominant wind direction.
6. The construction method of the desert highway composite sand prevention system according to claim 1, wherein in the step S4, the wind speed sensor and the wind erosion flux sensor transmit data to a monitoring center in a wireless mode, and a real-time intelligent monitoring network for the state of the sand prevention system is formed.
7. The construction method of the desert highway composite sand control system according to claim 1, wherein after the grass square grid is paved in the step S2, drought-resistant sand fixation plant seeds are sown in the square grid, the seeds are sown after being mixed with a water-retaining agent, and a miniature water pit is arranged in the middle of the square grid.
8. The construction method of the desert highway composite sand control system according to claim 1, wherein in the step S5, the flame-retardant ecological blanket paved in the fireproof isolation belt is formed by braiding coconut fibers and basalt fibers, and a flame retardant is sprayed on the surface of the flame-retardant ecological blanket.
9. The construction method of a desert highway composite sand control system according to claim 1, wherein in step S2, automatic grass laying equipment with GPS positioning is used for laying and pressing reed squares to control grid size, reed density and burial depth.
10. The construction method of the desert highway composite sand prevention system according to claim 6, wherein after construction is finished, a soil humidity sensor is arranged in the system and integrated with the monitoring network, so that an Internet of things platform for effect evaluation and maintenance decision is constructed.

Description

Construction method of desert highway composite sand prevention system Technical Field The invention belongs to the technical field of desert highway sand prevention, and particularly relates to a construction method of a desert highway composite sand prevention system. Background In desert areas, roads are often affected by wind and sand erosion, so that roadbeds are buried, road surfaces are damaged, and driving safety and road service life are seriously affected. The traditional sand prevention measures mostly adopt a single grass square sand barrier or a high vertical sand barrier, and have the problems of poor material durability, single protection structure, lack of intelligent monitoring and long-acting maintenance mechanisms and the like although having certain wind prevention and sand fixation effects. For example, reed grass grids are easily damaged by weathering and rain erosion, high vertical sand barriers are easy to topple over under strong wind or the net surface is aged, and the whole sand-preventing system is difficult to adapt to complex and changeable desert environments. In addition, the traditional method has low construction precision, difficult vegetation recovery and insufficient fireproof capability, and is difficult to realize continuous optimization and scientific management of the sand prevention effect. Therefore, a construction method of a composite sand prevention system with more stable structure, more integrated functions and intelligent monitoring and ecological restoration capabilities is needed to improve the overall efficiency and sustainability of wind prevention and sand fixation of a desert highway. Disclosure of Invention In view of the above, the present invention provides a construction method of a desert highway composite sand prevention system, which is used for solving the above problems. In order to achieve the above purpose, the present invention adopts the following technical scheme: A construction method of a desert highway composite sand prevention system comprises the following steps: S1, measuring and paying off on sand on two sides of a roadbed, and laying a composite system consisting of grass square sand barriers and high-standing sand barriers; s2, paving annual reed soaked by the biological-based sand-fixing agent to form a grass square sand barrier with the size of 1m multiplied by 1m, and pressing the reed into a sand layer by 15-20cm, wherein the dosage of the reed per square meter is not less than 1.2kg; S3, arranging a high-standing sand barrier outside the grass square sand barrier, wherein the high-standing sand barrier is formed by combining reed bundle sand barriers and PE nylon net sand barriers at intervals, and the surface of the PE nylon net is coated with an ultraviolet-resistant composite coating; S4, taking a wood pile as an upright post, wherein the pile distance is 3m, the burial depth is not less than 70cm, and a wind speed sensor and a wind erosion flux sensor are arranged at the top of the wood pile; S5, during construction, a fireproof isolation belt filled with a flame-retardant ecological blanket is arranged along the route direction at intervals of 300 m. Further, in step S2, the bio-based sand fixing agent includes vegetable gum, humic acid and microbial agent, and after soaking, a moisture-preserving corrosion-resistant layer is formed on the surface of reed. Further, in the step S2, the grass square sand barriers are laid out by adopting a multi-scale grid, wherein a 0.5m multiplied by 0.5m dense grid is adopted for the adjacent roadbed area, and the grass square sand barriers are transited to a 1.5m multiplied by 1.5m sparse grid outwards. Further, in step S3, the ultraviolet-resistant composite coating of the PE nylon mesh is a polyurethane modified acrylate coating doped with nano silica particles. In step S3, a sand guiding fence with an adjustable inclination angle is additionally arranged at the outermost side of the high vertical sand barrier, and the angle of the fence can be adjusted seasonally according to the dominant wind direction. Further, in step S4, the wind speed sensor and the wind erosion flux sensor wirelessly transmit data to a monitoring center to form a real-time intelligent monitoring network for the state of the sand control system. Further, after the grass square grid is paved in the step S2, seeds of drought-resistant sand-fixation plants are sown in the square grid, the seeds are sown after being mixed with the water-retaining agent, and a miniature water collecting pit is arranged in the middle of the square grid. Further, in step S5, the flame-retardant ecological blanket laid in the fire-proof isolation belt is formed by weaving coconut fiber and basalt fiber, and the surface of the flame-retardant ecological blanket is sprayed with a flame retardant. Further, in step S2, the automatic grass laying equipment with GPS positioning is used to lay and press the reed squares, so as to control the