Investigation And Analysis Of Changsha City Road

In this paper,based on the shade action of Hunan Province and the action of "three years of greening in Changsha",this paper first conducted a comprehensive survey on the urban road of Changsha and carried out a survey of 54 roads.On this basis,Greening plant selection,road layout,road greening index,road greening later maintenance and three years of green survey results,at the same time,to build a reasonable evaluation system,according to the relevant standards and expert opinions on the Changsha city road greening situation on-site scoring,Come to Changsha city road green quality results,the conclusions are as follows:(1)Of the 112 samples of this survey,there were 67 genera,102 genera and 116 species of plants.There were 21 families,30 genera and 33 species of trees,31 families,40 genera and 52 species,Ground cover plants are 16 families,19 genera,23 species,vines are 8 families,8 species,8 genera.Contains more plant species and contains three or more families are Magnoliaceae,Leguminosae,Sapindus,Hollyceae,Rhinoceros,Liliaceae and Lycoris.(2)In the survey,the main focus of the six districts of Changsha,a representative of the main road and secondary roads a total of 39 roads,of which the main road,secondary roads belong to a board and two zones are six,11 of 17 a total of about 43.5 %,The number of occurrences,followed by the three-plate four-band,respectively,10,a total of 11 accounted for 28.2%,two-plate three-band were four,three of a total of seven accounted for 17.9% Type for the main road 4 accounted for 10.2%.(3)Through the investigation of two indicators of the key section,we reached a total of 17 roads of excellent standard,and there are 23 roads of good standard,and there are 14 roads of medium and the following.(4)to investigate the road construction to retain a total of nine trees,mostly camphorbased,the overall situation is better,but there are individual growth potential downturn,the need to develop protective measures.(5)Trunk tree trimming basically meet the sidewalk,small cars,medium cars and trucks the first branch point 2.2m,2.5m,3.5m and 4.5m functional requirements.But there is a pruning step in the pruning process,resulting in false pruning.Through the analysis of the results,the paper puts forward the optimization plan for the existing problems and the situation of the city to improve the status of urban road greening in Changsha and improve the quality of urban road greening.