Study On Suitability Zoning Of Site Construction In Shenzhen Based On Fuzzy Clustering Analysis

With the rapid development of our economy,the increasing demand for the construction site,the construction land increasingly tense,some area which is originally not be suitable for using as construction site has been taken into account.Listed as the first special economic zone in China,Shenzhen has taken measures with scope in economic construction.Most of human engineering activities for the popurse of utilizing land,constructing subway,airport,wharf,may destroy the fragile geological environment,and cause serious geological disasters.This has became one of the key factors which restricts the sustainable development of Shenzhen city.Therefore,it is very necessary and urgent to evaluate the suitability of site construction in Shenzhen area to guide the construction of and the prevention and control of geological disasters.In order to evaluate the suitability of site construction in Shenzhen area,this paper used the method of fuzzy clustering analysis,based on,the existing field data,and then get the classification threshold,calculate and classify the whole construction site in Shenzhen area..The main conclusions and results are as follows:(1)This paper makes a summary of the evaluation methods and applicability of site suitability evaluation in china,in accordance with the national standards for the suitability of land for construction purposes,the suitability of the site construction in Shenzhen area can be divided into three levels,which are suitable,basically suitable and unsuitable,according to the principle of establishing the suitability evaluation standard and evaluation index system,this paper establishes the evaluation index system frame of the construction site suitability in Shenzhen.(2)According to the current code of China and the characteristics of Shenzhen area,this paper established classification of complex quantitative system of geologicalstructure,topography,lithology,hydrogeological conditions,meteorological conditions and human engineering activities of several major impact indicators and the corresponding threshold.(3)Used the method of fuzzy cluster analysis,this paper deal with the limited field data and formed the training samples,which are divided into three categories: the classification threshold is 0.727,and then classified the whole region of Shenzhen,to realize the regional suitability evaluation of regional construction.Finally,this paper found out that the suitable area of Shenzhen district is about 140.1km2,accounting for about 8.1% of the total area,mainly located in the southern border of Luohu District and Hongkong,the basic suitable area is 347.7km2,accounting for 20.2%of the total area,which distribution along the Shenzhen fault zone,the suitable area is about1232.6km2,accounting for 71.7% of the total area,most distributed in the central and Western regions.