| Urban road green space is an integral part of urban green space system. Road green space is the skeleton of a city, the road green space quality is directly related to the city’s overall style, good roads, green space environment as a city’s "business card", give a person leave deep and good impression.This paper takes 34 main urban roads green space in TangShan as object of investigation and analysis. It chooses 45 typical artificial plant quadrates randomly which were investigate and analysis in plant composition, road horizontal structure, vertical structure analysis,and then the selected the 15 road landscape using AHP evaluation methods for the comprehensive evaluation. Some suggestions and optimization modes are given based on the advantage and the shortage of the comprehensive evaluation and analysis,to build the beautiful Tangshan provide technical support for the construction of urban green space.Main research results as follows:1. The characteristics of artificial plant community of the road green space in Tangshan were investigated and analysed in quantification. The results showed that a total of Tangshan green trunk using 62 kinds of plants, including 31 tree species, 19 shrubs species, 12 kinds of herbs,involving 29 families,51 genera. Trees and shrubs plants accounted for 80.65%; Among them in woody plants, woody plants has 11 species and deciduous plant has 39 species, evergreen and deciduous than about 1:4, it illustrates that the application of evergreen plants in Tangshan area needs to be improved.2. From the application of frequency analysis found that the application frequency of the road greenbelt plant more than 6 residential sample includes 10 kinds of tree which are Ginkgo biloba,Sophora japonica,Pinus tabulaeformis and so on. it is important to that the application frequency of the road greenbelt plant more than 6 residential sample has no herb, this illustrates that the application of herbaceous plants in road-greenbelt of Tangshan city is to be increased.3.From the analysis on the ornamental characteristics, flower foliage plants accounted for the vast majority, the flower has 33 species, both from viewing season and have different characteristics from the view of flower color, focuses on evergreen foliage plants, hard to avoid feel drab, perennial different applications have 4 kinds of color leaf tree species, the species less.4.From the vertical structure and horizontal structure analysis, the level structure in road survey of Tangshan road sections are mainly concentrated in one- board-two- belts and three-board-four- belts, other forms of the cross section of using are less. The most often used one- board-two- belts have 24 samples, accounted for 53.33% of all survey sample belt. Three-board-four-belt type article 18 of the cross section forms, has accounted for 40% of the survey sample belt. Four-board-five-belt type section of form only at least 3, the proportion is 6.67%. In the vertical structure, mainly the structure is composed of arbor,shrub,herb, although there are more levels of complex structure, but also not much in application, and on the quality of configuration is not too high.5.Using the AHP analytic hierarchy process(AHP) and comprehensive evaluation analysis was carried out on the 15 road landscape: I, II, III grade road landscape respectively 3, article 7 and article 5, class I road landscape is the common plant species is rich, and growth is good, reasonable configuration and beautiful, rich vertical structure level, most of the road surface structure for plate belt, can very good convergence with the surrounding landscape, give a person the feeling of comfort and overall, and class II, III grade defects and differences exist in the above aspects.6.Through field investigation and landscape evaluation analysis, Tangshan road green space, there are 6 disadvantages: the types of plant use less; the seasonal change is not rich; fewer native plant use; the vertical structure level is not obvious; landscape lack of local characteristics, and the problems of maintenance management does not reach the designated position, in view of the above problems, put forward the corresponding countermeasures: increase with regional culture characteristics of native plant species, such as Elsholtzia stauntoni Benth. using plants the seasonal changes in Tangshan characteristic landscape; rich plant hierarchy, improve Tangshan culture characteristics, for example in setting the path marked position in landscape; and establish a responsibility to the people of long-term management mechanism.And put forward three kinds of road green space design for the future intention road plant configuration mode in Tangshan City. |
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