Proceedings-DFI/EFFC 11th International Conference on Piling and Deep Foundations, 2014, Stockholm, Sweden, (DFI)
Efficacy and Execution of Floating Lattice-Shaped Cement Treatment against Liquefaction
Hidenori Takahashi and Yoshiyuki Morikawa, Port and Airport Research Institute, Japan; Hirofumi Taguchi and Sachihiko Tokunaga, Cement Deep Mixing Association, Japan; Kenji Maruyama, Geodesign Co., Japan
The present study proposed a new liquefaction countermeasure to improve sandy ground and conducted a trial execution. The new method is a floating-type and lattice-shaped cement treatment method, where cement-treated soil is not fixed to a non-liquefiable stratum. A fixed structure such as treated soil should be formed at the side of the floating-type treated soil to reduce its lateral displacement. In the study, one-dimensional dynamic response analyses were first conducted to confirm the mechanism of the new method. Then, a series of centrifuge model tests were performed to demonstrate the effect under a stress condition at the prototype scale. The analyses and model tests confirmed the effect of the liquefaction countermeasure. Finally, trial executions were carried out to confirm high-quality vertical execution.
|article #1946; publication #100 (IC-2014)|