CENTRIFUGAL MODEL TEST ON THE PASSIVE RESISTANCE OF STEEL PIPE SHEET PILES WITH SOIL IMPROVEMENT

Abstract

 The quantitative evaluation of the improvement effect is important in the design of the frontal ground improvement to increase the passive resistance of gravity-type caissons and other anti-soil pressure structures. In the case of increasing the passive resistance to soil pressure from the ground behind the quay wall by solidifying the front of a steel pipe sheet pile in a normally compacted clay ground, the mechanism of passive resistance and the relationship between the extent of improvement and the effect of improvement are unclear.An existing design method similar to the present case is a simple design method using a beam-spring model. However, this method is intended to be applied to sandy ground, and its applicability to clay ground has not been confirmed. In this study, the applicability of the design method using a beam-spring model to solidify and improve the front of an existing gravity-type quay wall using steel pipe sheet piles was verified by centrifugal model tests.