Mitigation of liquefaction-induced ground displacement by using gravel and geosynthetics – validation by model experiment

ICG 11 - 2018 Seoul Korea
2018
Hajime Kawasaki, Hendra Setiawan, Masakatsu Miyajima, Mitsuru Nakamura, Wataru Sugita, Yuko Serikawa
South Korea
IGS Conferences
geosynthetics, gravel, ground displacement, horizontal displacement, liquefaction, shaking table test, vertical displacement

Earthquakes in liquefaction-prone areas are usually followed by the ground surface displacement due to liquefaction. This paper aims to study the influence of geosynthetics along with gravel usage on the liquefaction-induced ground displacement, both horizontal and vertical displacement using shaking table equipment. This influence is analyzed by measuring pore water pressures and soil deformation due to shaking process. The results of a series of 1-g shaking table tests which have been conducted are as follows: by using proposed mitigation, the horizontal displacement decreased up to 23%, and vertical displacement, which performed in two different initial relative densities, i.e., 50% and 90%, was reduced by 36% and 30%, respectively. Moreover, a differential settlement between loose sand and dense sand decreased as well, up to 38%.