CENTRIFUGAL MODEL TESTS ON LATERAL BEARING CAPACITY OF EXISTING CAISSON FOUNDATION REINFORCED BY STEEL PIPE SHEET PILES

Abstract

Steel pipe sheet pile reinforcement method for existing caisson foundation in water, which is driving SPSP around caisson foundation and connecting between SPSP and caisson at the top, is proposed. This method is constructed in practical, but effect of reinforcement and SPSP load ratios, which refers to the total load transmitted from caisson to SPSP reinforcement divided by the total load applied on the SPSP reinforced caisson, is not understood. It is thought that these factors are influenced by caisson-SPSP connection condition and flexural rigidity ratios of caisson to the SPSP and bearing layer's condition. To make these influence clear and recommend easy, cheap and effective construction method, centrifugal tests on these factor are conducted.