Study on levee reinforcement using double sheet-piles with partition walls

Abstract

A large earthquake such as Nankai Trough Earthquake is concerned to occur in the near future and there is fear that coastal levees will sink by liquefaction. Authors proposed installing double sheet-piles into the levee and additionally combining another sheet-pile as a partition wall perpendicular to the extension direction to the levee. It has been confirmed by model tests that this countermeasure is very effective for the deformation/settlement reduction of levees during an earthquake. However, since the partition wall was modelled by the steel plate in the model tests, the effect of the joints between sheet-piles could not be taken into consideration. Authors also reproduced the model test results by using a two-dimensional effective stress analyses (code:LIQCA2D12) with high accuracy. In the numerical study, the slippage effect of joints between sheet-piles for the partition wall was taken into account. As a result, it was confirmed that the shear distortion generated between the joints weakens the constraint of the ground inside double sheet-piles, but in spite of this negative effect, the settlement of levee was reduced down to 15% compared to the case without countermeasure.

Stability Analysis of Cofferdam with Double-Wall Steel Sheet Piles under Wave Action from Storm Surges

“…Zhu et al [20] applied the Bayesian approach to enhance the reliability assessment of DSSPs, integrating both statistical and field data effectively. The innovative combination of perpendicular partition and double-wall sheet piles for levee reinforcement was analyzed by Fujiwara et al [21] through shaking table experiments and 2-D simulations, assessing earthquake response. Xue et al [22] conducted stability analysis for cofferdams of pile wall frame structures by engineering tests and 3-D FEM numerical simulations and proposed a design method based on the limit equilibrium method.…”

Stability Study of a Double-Row Steel Sheet Pile Cofferdam Structure on Soft Ground

“…Monika et al [23] investigated the cofferdam of the main central column foundation of an asymmetric bridge using numerical simulation based on the finite element method with Plaxis geotechnical software. Fujiwara et al [24] examined the dynamic behavior of a structure with partition walls perpendicular to sheet piles under seismic action through shaking table tests and 2D numerical simulations. Wang et al [25] used FLAC 3DV6.0 software to numerically simulate the excavation process of steep reinforced riverbank slopes in an effort to predict long-term slope deformation.…”