中文摘要：

在讨论现有岩溶发育特征描述指标的基础上，将某高程范围内的溶蚀高度与其地层厚度之比定义为溶蚀率，建立了溶蚀率计算及误差分析方法，最后通过典型的工程案例验证了基于溶蚀率建立的溶蚀程度定量分析方法的先进合理性。研究结果表明：溶蚀率综合考虑了场地岩面溶蚀和洞隙发育情况，具有良好的数值稳定性；各高程点的溶蚀率误差不大于其遇洞率误差，故一定高程以下的溶蚀率误差可转化为遇洞率误差进行分析；基于溶蚀率建立的溶蚀程度定量分析方法能合理刻画建筑地基溶蚀程度随深度增大而衰减的规律，其数据主要来源于场地勘察报告，数据丰富可靠，成本低廉，具有明显的工程针对性和技术可行性。

英文摘要：

On the base of the discussion of existing parameters characterizing karstification feature, the ratio of dissolution height and stratum thickness in a height range was defined as dissolution ratio, then a method for dissolution ratio calculation and deviation analysis were established respectively. Finally, the advantage and rationality of dissolution degree quantitative analysis method based on dissolution ratio were demonstrated through typical projects from karst terrain. The results show that the dissolution ratio is a comprehensive parameter with numerical stability to measure the degree of rock surface dissolution and caverns development, and its deviation can be inferred from the deviation of hole-bore percentage because deviation of dissolution ratio can not be more than deviation of hole-bore percentage at the same elevation. The dissolution degree quantitative analysis method based on dissolution ratio can describe the decay law of dissolution degree along depth, and is obviously project-specific and technically feasible, for geological investigation report can provide abundant economical reliable data.