Preferential Selection Of Ecological Slope Vegetation For Highway Slopes In Typhoon Areas And Its Stability Study

With the development of the country,the construction of traffic and road infrastructure has received more and more attention,and the construction of highways has become an important project for land transportation.China is a vast country with many mountains;therefore,the research on slope protection and stability in the process of mountain highway construction has also become a focus of attention.At present,there are few studies on slope ecological protection at home and abroad,and a complete theoretical system has not been formed,and there is a lack of targeted theoretical guidance and practical application,especially the research on ecological slope protection in typhoon areas is less.Therefore,this paper combines engineering practice,obtains actual meteorological monitoring data on site,conducts on-site monitoring,vegetation screening and numerical simulation for slopes in typhoon areas,forms a preferential evaluation system for vegetation in typhoon areas,and provides perfect theoretical guidance and on-site application for slope protection in highway construction.The main research contents of this paper are as follows.(1)By regularly monitoring the meteorological factors around the slope and the soil temperature and humidity at the site,the long-term changes of meteorological parameters such as temperature,humidity,wind speed,solar radiation and rainfall around the slope are obtained,thus revealing the time-varying laws of "micro-meteorological" indicators around the slope.(2)A model of soil moisture prediction by meteorological factors based on improved BP neural network with genetic algorithm was established and applied to a slope project in Taizhou to predict soil moisture,which confirmed that the method has good accuracy.(3)Adopt non-destructive testing technology to detect the root system of typical vegetation with different development conditions on the existing slope,and obtain parameters such as the root development form of typical vegetation,the depth of the influenced soil layer and its growth condition.And a three-dimensional finite element model is established for slope stability analysis.(4)Based on the improved fuzzy hierarchical analysis method,a vegetation evaluation model for high slopes in typhoon areas was established to provide practical guidance for slope vegetation assessment.