Abstract
Based on the characteristics of regional geological conditions in Guangzhou and the theoretical knowledge of risk zoning, the evaluation index system of geological risk zoning for planning and construction in Guangzhou is constructed. The first level indexes are 7 factors and 11 secondary factors. Through the GIS,the geological risk zoning map of Guangzhou planning and construction is drawn, which is divided into seven areas。The excellent area, medium thick soft soil area, thick layer soft soil area and the weak karst development area are drawn high-intensity and medium-intensity development areas, accounting for 46.7% of the total area of Guangzhou. Strong karst development area and mined-out area are drawn moderately developed areas, accounting for 3.7% of the total area of Guangzhou. The Mountain area are drawn restricted development area, accounting for 49.6% of the total area of Guangzhou. At the same time, the geological risks are given in the process of urban construction by different areas. It can be used for reference for other cities with similar geological conditions.
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