Study On The Members Of The Shallow Buried Underground Protective Structure And The Effects Of The Buffer Isolated Layer

With the present war turning fast and automotive continuously, the past protective structure made of reinforced concrete etc, due to construction is slow, has gradually not adapted to the requirements of the present war. However, the fabricated protective structure developed recent years is being applied extensively in the present military, because it is assembled easily, constructed quickly and suited to various geological conditions and climate environment. But, the problems on the composition materials of base members of protective structure and how to strengthen its performance of resisting blasting load after shallow buried, are still in study and exploratory at the present time.Based on a new type of fabricated protective structure, the base members of protective structure which are steel plate-polyurethane foam sandwich plates are studied in the thesis though the test. The thesis analyses the structural style and mechanical property of the sandwich plates adopted through static test, and analyses the performance of resisting blasting load of the sandwich plates through field chemical blast test.In order to strengthen the fabricated protective structure's performance of resisting blasting load, the method that steel plate-polyurethane foam sandwich plates used as buffer isolated layers were set in the earth covering was adopted. The paper analyses the impact of the dimension of buffer isolated layers on the effect of its strengthening the fabricated protective structure's performance of resisting blasting load.Test and finite-element analogue state that the steel plate-polyurethane foam sandwich plates having higher bearing capacity and good performance of resisting blasting load can be used as the base members of the fabricated protective structure, the bending resistance of the sandwich plates having corrugated round steel as bearing skeleton is preferable to that of sandwich plates having steel plate as bearing skeleton, and the buffer isolated layers which were made up of sandwich plates with proper dimension can result in good strengthening effect.