Abstract: The topographic between Station K2+890 and K36+200 in the widening of GuangzhouQingyuan Expressway line is plain underlying with shallow buried kart terrain. The average overburden soil thickness is 15 meters. The rock cavities are well developed in this area with a rate of cavity of 62.8%. The rock cavities, pinnacles, dimension of rock cavity and soil filling information encountered in each borehole are statistically analyzed to characterize the karst features. The information was input into a database software so that different parameters can be rapidly extracted for the rock analysis and other design and construction purposes.

Key words: Guangzhou Qingyuan Expressway, Karst Characterization, Karst Classifications, Database Software