| The purpose of this paper is to introduce a rational design method、 in which composite ground is formed around piles constructed in soft ground and ground subject to liquefaction and the increased shear strength is reflected as the horizontal resistance of piles. In the proposed design method、 the necessary range of composite ground around piles and the horizontal subgrade reaction of piles with the increased shear strength are determined based on engineering ssessment. Since composite ground is a kind of artificial ground that is stronger than the original ground、 a method for the verification of seismic performance depending on earthquake motion levels was proposed based on the results of centrifuge model tests and a numerical analysis using dynamic nonlinear finite element method. |
