(1. Department of Geotechnical Engineering，China Institute of Water Resources and Hydropower Research，Beijing 100048，China；2. State Key Laboratory of Hydroscience and Engineering，Tsinghua University，Beijing 100084，China)
Abstract：Due to the limited size of model box，the centrifuge model can?t meet the requirement of semi-infinite body in situ experiment，which forms the boundary effects. This problem is especially prominent in blast centrifuge modeling. Relying on Tsinghua University 50 g-t geotechnical centrifuge，several blast centrifuge model tests have been done to select appropriate boundary material by analyzing the accelerating field. The results within 20 cm from the explosion center can be accepted under the conditions of acceleration 50 g，explosion 2.5 g after adding the material in boundary.
2013, Vol. 32 
