Full-Scale Model Test for Earthquake-Resistance Reinforcement of Pile Foundation Using Ground Solidification Body

Abstract eng:
The necessity of earthquake resistant reinforcement for structural foundations in large-scale earthquakes is rising. Especially, earthquake resistance reinforcement methods for pile foundations for bridges and buildings and pipeline networks for water, sewage, gas etc. are limited by various unfavorable construction conditions. Urano, Adachi, Mihara and Kawamura proposed a new method for earthquake resistance reinforcement applicable to either new or existing pile foundations, which was confirmed by model shaking table test under 1g gravitational field and the numerical simulation analysis. The proposal method aims to increase the stiffness of the pile foundation by the effect of a two layered Rahmen structure by the reinforcing body made in the ground. This paper shows a full scale field test of the proposed method and its numerical simulations that were conducted to examine deformation characteristics of the reinforced foundation and the effect of the reinforcement. Based on the test results, applicability of the proposed reinforcement method for a pile foundation has been confirmed.

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