Study On The Effects Of Cladding On The Shallow Buried Underground Protective Structures

With finite-element analogue, the thesis analyses the performance of the protective structure on resisting blasting load in turn when effected by load in different direction or covered by different soil cover or with energy-dissipating layers of different size.Though the study on the five different loads,it can be concluded that the protective structure has enough bearing capacity when blasting load affecting on different position of the structure, and the center of the top of the earth is least of all disadvangde positionBy contrast the displacement and stress of the protective structure covered by clayey soil or silt or sand or artificial soil .it is endued that the function of the density and modulusofeastocity of the earth cover on the performance of resisting blasting load is important.In the five soil ,the ordinal of the soil in dissipating energy is clayey soil, silt, sand, artificial soilIt can be concluded that he function of the energy-dissipating to strengthen is improved when it's size is increased, but the range of the swell is fall. The analysis result indicated that when the size of the energy-dissipating layers is 0.9 times as the size of the protection's top area, it is reasonable.