Method for utilizing movable plate sand-blocking wall to block wind and sand

Abstract

The invention provides a method for utilizing a movable plate sand-blocking wall to block wind and sand. The method comprises the steps that reinforced concrete stand columns are embedded in a wind and sand prevention zone, the lower portions of the reinforced concrete stand columns are horizontally provided with fixed sand-blocking boards to prevent the lower portions from being undercut; the upper portions of the reinforced concrete stand columns are horizontally provided with a plurality of movable sand-blocking boards, as the strength the wind-sand flow is continuously enhanced, the movable sand-blocking boards are gradually blown up and play a certain blocking role in the transit wind-sand flow, and accretion sand is formed behind a sand-blocking wall. Spacing reserved openings are reserved in the fixed sand-blocking boards and the movable sand-blocking boards to mitigate wind-sand flow strength. When the wind-sand flow strength is high, foam concrete movable sand-blocking boards are blown up in sequence, the wind-sand flow can go through the sand-blocking wall through gaps among the sand-blocking boards. Besides, frictional resistance is increased, a great amount of kinetic energy in the wind-sand flow is reduced, wind speed is also gradually reduced, thus the sand loading capacity of the wind-sand flow is reduced, and the accretion sand is generated behind the sand-blocking wall. The movable plate sand-blocking wall has a good wind-sand prevention effect and a long service life.

Description

technical field [0001] The invention relates to a method for protecting wind and sand by using a movable plate sand retaining wall, and belongs to the technical field of sand prevention and sand fixation. Background technique [0002] With the rapid development of economic construction in western my country, infrastructure construction such as railways, highways, and urban development has been widely carried out in deserts and Gobi areas in northwest my country. Sandstorms are more serious harm to railways and highways. If necessary protective measures are not taken, it will cause serious damage to infrastructures such as railways and highways, and even threaten the safe operation of infrastructures. [0003] At present, the existing engineering sand-blocking measures mainly include sand-fixing measures and sand-blocking measures, among which sand-blocking measures are more commonly used. Among them, the sand-retaining measures include concrete sleeper sand-retaining walls,...

AI Technical Summary

Problems solved by technology

Among them, the sand-retaining measures include concrete sleeper sand-retaining walls, PE net high vertical sand barriers, reed sand-retaining fences, etc. These engineering sand prevention measures have played a certain role in the prevention and control of wind and sand disasters such as existing railways and highways. However, there are generally problems such as difficult construction, high cost, and low sand control benefits.

Especially when sand control is carried out in strong wind areas such as "Baili wind area" and "Yandun wind area", the durability and stability of the general structural sand blocking measures are poor, while the sleeper sand retaining wall and concrete sand retaining The wall has strong durability and stable structure, but its high cost, limited materials and difficult construction are not conducive to large-scale promotion

[0004] Among the existing sand-resistance measures, in terms of sand-resistance effects: ①The sand-resistance measures with rigid structure, when the wind-blown sand flow passes through the sand barrier, the sand particles are easy to accumulate in front of the barrier when the wind speed is low; Under the environment, the wind-sand flow is not enough to blow up the cement concrete slab. According to the principle of fluid mechanics, when the wind-sand flow encounters a rigid structural obstacle, the fluid will climb up the rock and cross the sand barrier, which has less resistance to the wind-sand flow. Sand accumulation is formed in a large area, and the sand control effect is not ideal, and the lower part of the sand barrier will be corroded, affecting the stability of the sand barrier structure and shortening its service life; PE net sand barrier) has a good protective effect on wind and sand flow, but when the wind and sand flow passes through the sand barrier, it is easy to form sand accumulation near the front and back of the barrier and bury the sand barrier, so its service life is short, and the sand barrier of the flexible structure measures, it is necessary to lay multiple sand barriers in order to achieve an effective effect of wind and sand control, and its maintenance cost will increase accordingly

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