2017 Volume 5 Issue 2 Pages 34-37
Damages to detached houses, including settlement and tilting, were reported as a result of the 2011 off the Pacific coast of Tohoku Earthquake. Because liquefaction countermeasures usually employed for public works were expensive, common liquefaction countermeasures were difficult to apply to detached houses and a clear design method for the ground improvement against liquefaction has not seen in the Building Standards Law, the effective ground treatment has not been carried out to detached houses. In this study, for detached houses, in order to propose a simplified design method capable of predicting the settlement and tilting of the houses, model shaking table tests and numerical simulation are carried out. As the result, in this paper, the following conclusions are obtained.1. Terzaghi’s ultimate bearing capacity can be calculated using circular slip method.2. The numerical analyses are found to be able to reproduce the experimental results very well.3. In the simple design method, regardless of the friction angle, the excess pore water pressure ratio is lower, the higher the safety factor is. Furthermore the water lever is deeper, the higher the safety factor is.