2022 Volume 78 Issue 2 Pages I_541-I_546
To increase the passive resistance of the ground in front of retaining walls, the quantitative evaluation of the improvement effect is important in the practical design. In particular, when the front of the steel pipe sheet pile is stabilized in the normally consolidated clayey ground to increase the passive resistance to earth pressure from the ground behind the quay wall, the mechanism of passive resistance and the relationship between the improvement range and the improvement effect should be clarified. A simple design method using a beam-spring model was proposed for stabilization of the ground in front of sheet pile walls. However, this method was validated for sandy soil, and its applicability to cohesive soil is not yet confirmed. In our research group, the applicability of the design method using the beam-spring model to cohesive soil ground for deepening the existing gravity-type quay wall using steel pipe sheet piles was examined using centrifuge model experiments. In this study, to investigate the mechanism of passive resistance and the relationship between the improvement range and the improvement effect, reproduction analysis and parametric study are performed.
