CENTRIFUGAL MODEL TESTS FOR RESPONSES OF SHALLOW-BURIED UNDERGROUND STRUCTURES UNDER SURFACE BLASTING
(1. Institute of General Plan and Geology，China Nuclear Power Engineering Co.，Ltd.，Beijing 100840，China；
2. Institute of Geotechnical Engineering，Tsinghua University，Beijing 100084，China；3. State Key Laboratory
of Hydroscience and Engineering，Tsinghua University，Beijing 100084，China；4. Department of Civil Engineering，
Hong Kong University of Science and Technology，Kowloon，Hong Kong)
Abstract：Shallow-buried circular structures under surface blasting were investigated by using Tsinghua University 50 g-t geotechnical centrifuge，and the dynamic responses of structures were studied under the conditions of different explosive charges，different buried depths of structures，different materials of overburden layer and different water contents of soil. The results showed that：(1) The crater ejecta significantly affected by the Coriolis acceleration；(2) The peak strain at the bottom of the structure was about one third of that at the top part；(3) The more water the soil layer contained，the greater the strain response of the structure was；(4) The sandy soil as covering material was helpful to the blast-resistant of structure. These results can provide references to reinforcement of existing structure and design of underground structures.
丁兆奎，熊建国. 冲击荷载下土中浅埋箱形结构反应的模型试验研究[J]. 爆炸与冲击，1990，10(2)：145-155.(DING Zhaokui，XIONG Jianguo. Model tests of response of shallow buried box-type structures to impulsive loading[J]. Journal of Blasting and Shock，1990，10(2)：145-155.(in Chinese))
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2010, Vol. 29 
