Abstract: To ensure the smooth construction of new airport project in Shenlongjia, the karst depressions and karst cones were treated by dynamic consolidation with cushions on the foundation. According to the design parameters of foundation treatment requirements, the density and particle size distribution of cushion material were tested. The settlement of foundation by the dynamic consolidation, the standard penetration test before and after foundation treatment, wave velocity test and load test were also analyzed. Results demonstrate that dynamic consolidation method with cushion is suitable for the treatment of Karst landform foundation at Shenlongjia new airport project. It could effectively improve the bearing capacity of Karst landform foundation. The tests in this research provide basis for this project and also for other similar projects.

Key words: karst landform, dynamic consolidation method, ground treatment, experimental research