Paper (In Japanese)
ESTIMATION OF THICKNESS OF LIQUEFIED LAYER FROM SAND BOILING PATTERN
2008 Volume 64 Issue 1 Pages 79-89
Details
2008 Volume 64 Issue 1 Pages 79-89
A method to evaluate the thickness of the liquefied layer from the boiling sand appearing on the ground surface is proposed. The method is based on numerous shake table tests of sand ground with thin low permeable layer at the top. Sand boiling was observed on the ground top and lateral sides, and the area and the number of sand boils were counted. Both the low permeability layer and the Toyoura sand layer liquefied in tests. Based on this result, a relationship between thickness of the liquefied layer and number of sand boils per unit area was developed. The validity of the proposed equation is proven by the observation during the 2003 Miyagiken-hokubu earthquake.
