As building pile foundation bearing layer of rock foundation is one of the important parameters of engi-neering design,it directly affects the main structure of the safety,stability and economy. A project in Nanjing jiangning rock uniaxial compressive strength and the bedrock of load test,for example,contrast analysis of the Nanjing jiangning ar-ea extremely soft rock foundation bearing capacity value,discussed to determine the bearing capacity of soft rock charac-teristic value method of reasonable and effective. Similar areas to determine the bearing capacity of soft rock foundation has recommended value and guiding significance.%岩石地基作为建筑物桩基持力层是工程设计的重要参数之一，其直接影响着主体结构的安全性、稳定性及经济性。以南京江宁某工程的岩石单轴抗压强度与现场基岩载荷试验为例，对比分析了南京江宁地区极软岩地基承载力的取值，探讨确定软质岩承载力特征值的合理有效的方法。
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