72 results about "Surface wind speed" patented technology

The invention discloses a snow-ice melting method based on carbon-glass fiber composite woven nets, which belongs to the field of transportation and disaster prevention. The method is characterized in that a thermal insulating layer, a heat conducting layer, a carbon-glass fiber composite woven net subjected to electric insulation and sand sticking treatment, and another heat conducting layer are laid in turn on a base layer of a to-be-heated body; a temperature measurement element is buried in a surface layer of the to-be-heated body; a carbon fiber bundle heating element is connected to a controllable power source with protection function in a series parallel connection mode by use of electric conducting silver colloid and a conductor; and according to surface layer temperature of the to-be-heated body, surface wind speed, the thickness of snow cover and ice, air temperature and the expected time for melting snow and ice, a digital PID temperature control system optimizes and adjusts the control parameters of the system and regulates heating power. The method has the advantages of high construction speed, uniform fast heating, stable performance, long life span, low cost and the like, plays a role in preventing cracking and reinforcing, and is an ideal snow-ice melting method for pavement, bridges and other facilities.

The invention provides a method for comprehensive treatment of a moving dune through top sealing, slope fixing and side locking. The method comprises top sealing, slope fixing and side locking of the moving dune. Top sealing is to cover the top of the moving dune with a covering net, so that the original morphological characteristics of the top of the moving dune are protected; the overall wind speed of the moving dune is lowered; the moving rate of the moving dun is reduced. Slope fixing is carried out by adopting a sand fixing box for fixing the slope of the moving dune, so that sand burial and wind erosion can be effectively prevented; the wind speed of the earth surface is lowered; crust formation and plant growth are facilitated; recovery of an ecological system of the slope of the moving dune is promoted. Side locking is to arrange three sand blocking fences on the field among hills, so that the sand source is intercepted; the frequency that slop fixing measures and the field among the hills are buried by sand is reduced; the wind speed of the field among hills is lowered; the ecological system of the field among the hills is protected. According to the top sealing, slope fixing and side locking modes provided by the invention, a wind-sand moving is effectively prevented; the moving dune is fixed; sand damage is treated fundamentally; the ecology is protected; the method is sustainable; large-area popularization and application are easy to achieve.

The invention discloses a composite sand fixation model, and a preparation method and applications of same. In the method, fiber filaments are spray-spread on a field and a microbial-fixation solution is sprayed on the surface of the fiber filaments, so that the microbial-fixation solution is hardened on the surface layer of and inside sand; and with the fiber filaments, a rib reinforcing structure is formed. The structure overcomes the defects that a conventional microbial sand fixation method is high in brittleness of surface layer, is poor in durability and is liable to cause wind erosion, and the problems that a conventional geotechnical fiber mesh sand fixation method is high in cost and labor intensity consumption. When the fiber filaments are spray-spread, surface roughness of sand is improved and wind speed on ground surface is reduced, so that movement of sand is effectively inhibited or reduced and anti-wind erosion property is improved. Sand, which is reinforced by means of the composite sand fixation model, in a desert area is improved in bearing performance and tensile strength and compressive strength, wherein anti-deformation capability of soil body is improved and brittleness is weakened.