Dynamic Analysis of Gravity Quay Wall Considering Development of Excess Pore Pressure in Backfill Soil

J. Ocean Eng. Technol. 2010;24(5):39-47.

Ryu Moo-Sung,Hwang Jai-Ik,Kim Sung-Ryul

Korea Electric Power Corporation Research Institute,Samsung C&T Corporation,Dept. of Civil Eng. Dong-A University

과잉간극수압 발생을 고려한 중력식 안벽구조물의 동적해석

유무성,황재익,김성렬

한국전력공사 전력연구원,삼성물산 건설부문 토목사업본부 토목ENG팀,동아대학교 토목공학과

Keywords: Liquefaction, Shaking table test, Gravity quay wall, Excess pore pressure ratio, Shear modulus, Residual strength

핵심용어: 액상화, 진동대 실험, 중력식 안벽, 과잉간극수압비, 전단탄성계수, 잔류강도

Abstract

In this paper, a total stress analysis method for gravity quay walls is suggested. The method can evaluate the displacement of the quay walls considering the effect of excess pore pressure developed in backfill soils. This method changes the stiffness of backfill soils according to the expected magnitude of the excess pore pressure. For practical application, evaluation methods are suggested for determining the excess pore pressure ratio developed in the backfill soils and the backfill stiffness that corresponds to the excess pore pressure ratio. This method is important in practical applications because the displacement of the quay walls can be evaluated by using only the basic input properties in the total stress analysis. The applicability of the suggested method was verified by comparing the results of the analysis with the results of 1-g shaking table tests. From the comparison, it was found that the calculated displacements from the suggested method showed good agreement with the measured displacements of the quay walls. It was also found that the excess pore pressure in backfill soils is a governing influence on the dynamic behavior of quay walls.