昆明盆地活断裂对建筑场地的影响与对策

基于前人成果，对昆明盆地地震危险性进行分析。运用规范规定的建筑场地土层对下伏活断裂屏蔽作用的厚度定值，通过分析昆明盆地基岩埋深分布状况，划分需要和不需要避开活断裂区域。建议运用工程手段，在需要避开区域勘测确定并标绘活断裂的地表警戒带，此法可缩小避让活断裂的面积，减少工程投资，提高城市规划可靠度。

THE INFLUENCE OF ACTIVE FAULT ON BUILDING SITE IN KUNMING BASIN AND PREVENTION METHOD

In this paper, the earthquake risk in Kunming is analyzed based upon the former (studies).(According) to the soil thickness value of building site for prevention of the influence of underlying active fault, which is specified in the related Codes Specifications, the regions that need and don't need to avoid the active fault are plotted by the analysis of baserock's depth in Kunming basin. To the (region) that needs to avoid the active fault, we propose determining and plotting the surface warning zone of (active) fault with exploration engineering. This method can reduce the land area of investigation and (avoiding) active fault, save the construction cost,improve the working efficiency and increase the (Dutilization) of construction area.