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Northwest University of Science and Technology (2008)

Observational Study On The CharacteristicsProtection and Maintenance of Eco-Technology

Shi Zhi Bao

Titre : The Research on Desert Highway Slope Protection and Maintenance of Eco-Technology

Auteur : Shi Zhi Bao

Grade : Master’s Theses 2008

Université : Northwest University of Science and Technology

Résumé
For Maowusu sand YU Jing typical sections of highways on both sides of the law against sandstorms and sand on Highway Slope threat of harm,the different methods,physics of wind and sand,plant ecology,restoration ecology principle,using field observations,field Test and analysis of the indoor research,to adapt to Yu Jing highway slope protection and maintenance of ecological technology,in the light of local conditions and the suitable tree, harm security,the principles of favorableness,on the following main elements :(1) on the highway on both sides of sandstorms and their movements flow,flow and structure of sand dunes and the movement of research and analysis,and different forms of roadbed,height,slope,the wind direction and different angle different parameters of the road Optimization of draw:The highways cutting forms of harm than sand embankment of the sand level of serious ;erosion of the embankment degree slope length with a proportional slope,and road and the northwest wind angle there was no significant relationship,cutting the sand buried and the extent of the Leeward slope is inversely proportional to the gradient,and road and wind angle is directly proportional to the northwest ;The level of harm sand embankment slope parameters for the wind slope about 3m,the wind slope gradient around 15°(1:3.75).The sand harm a lesser extent the cut slope parameters for the Leeward slope about 10m,when the Leeward slope slope in the 15°(1:3.75),the slope of the wind a lesser extent,the degree of sand buried heavier,with the slope the increase of sand buried decreased, but the extent of increased wind erosion.(2) Through this pilot study recommended four roadbed slope protection typical pattern,it is :①sandy roadbed slope 1m×1m straw grid entire slope riding Lang line 2,line 2 Amorpha fruticosa Linn mixed planting ;②sandy roadbed slope 1m×1m straw grid Peashrub planted in the uphill slope downhill Seabuckthorn and Amorpha fruticosa ;③Loess whole package sloping roadbed slope Amorpha fruticosa line 2,Caragana line 2,Mongolia Caryopteris Line 2 strip planting ;④steep slope of the Loess bands close planting Amorpha fruticosa,Caragana.By the "canonization of sand silviculture protection zone" to "forefront of resistance with sand" and "grid-like sand barrier sand and plant protection zone" final "formation sand green belts",the four band formed one from the outside layers of protection, so that Wind flow around the area gradually reduced to sand windbreak,a solid roadbed, protection against wind and sand to prevent the road to ensure the smooth highway purposes. Through the actual test,this comprehensive protection system not only economically feasible, but protective effect is very clear,to ensure that victims sand from the desert highway, unimpeded.(3) Under the experimental and analytical studies of the natural environment along the desert highway conditions and plant growth needs of survival,in the "one-third planting,seven in charge of security" principle,from watering,weeding,fertilizing,pest and disease control,Pruning,crop-ping, planting update,barrier maintenance,and other aspects of the desert highway greening and ecological protection projects and specific measures to safeguard technology.Comprehensive and practical, user-friendly,comprehensive guide to greening the desert highway and ecological protection projects after the maintenance work.

Mots clés : desert areas Highway slope ecological protection Maintenance Technology highway

Présentation (Dissertationtopic )

Page publiée le 9 septembre 2014, mise à jour le 5 décembre 2017