Experimental Investigation of Soil Pressure on Subterranean Installations Subject to External Static and Dynamic Forces

摘要

The shape of the soil static pressure curve conforms with the theoretical curve obtained for circular subterranean structures. There is complete correspondence between cratering (due to explosion) and the pressure exerted on the retaining elements of the structure (as produced experi mentally). On using the experimental data to calculate the static pressure of the soil on the underground structural model, it was found that the lateral force amounted to 6070% of the vertical pressure. The magnitude of the soil dynamic pressure, which, on severe acceleration, makes up the major part of the static pressure, indicates the absolute necessity of studying soils with poor consistencies in regard to the pressure that will be exerted on underground installations in localities subject to seismic tremors. In the design of underground structures located in such areas, it becomes necessary to regard the seismic force as a function of static pressure. (Author)