Abstract
The present paper deals with the external force of liquefaction-induced lateral flow on an in-ground duct and supporting piles. For this purpose, the author conducted a model shake table test and a static load test. The lateral flow occured like a muddy flow in the soil container. In this reflection, the test results show that the degree of the external forces on the duct and piles are roughly proportional to the lateral flow velocity. Also the external force on the pile can be estimated by drag force utilization. Furthermore, the peak external forces on the duct and pile yield to total lateral earth pressure which can be estimated using the earth pressure coefficient equal to 0.15. This finding is believed to be a lead for developing an earthquake resistant desing practice.
