Mechanical Behavior and Reinforcing Effect of Full-Scale Test Embankment Applied the Reinforced Soil Method by Vertical Micro-piles

Kamura, Akiyoshi; Kazama, Motoki; Kawai, Tadashi; Kim, Jong-Kwan; Kumada, Tetsunori; Hikita, Nobuharu; Konishi, Seiji

doi:10.3208/jgs.13.249

Cited by 3 publications

(4 citation statements)

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“…This has motivated several researchers to develop a cost-effective alternative reinforcement methodology within the realm of performance-based design criteria. Among them, Kamura et al 19 conducted 3D-FEM investigation to study the effect of vertical reinforcement bars installed with different angles on the deformation mechanism of an embankment slope and found the sectional force and displacement magnitude of the reinforcement bar to vary depending on the angle of reinforcement bar. Wang and Orense 20 performed pseudo-static 3D FEM analysis on the vertical reinforcement and estimated the cross-sectional forces received by the reinforcement bars during an earthquake.…”

Section: Proposed Methodologymentioning

confidence: 99%

“…Among them, Kamura et al 19 . conducted 3D‐FEM investigation to study the effect of vertical reinforcement bars installed with different angles on the deformation mechanism of an embankment slope and found the sectional force and displacement magnitude of the reinforcement bar to vary depending on the angle of reinforcement bar.…”

Section: Proposed Methodologymentioning

confidence: 99%

“…𝐹 𝑅 𝐹 𝑆 (17) where, F R is the resisting force and is evaluated according to Equation ( 18) where, F y is the frictional force developed between the bottommost retaining wall block and the base and is evaluated as per Equation (19). Note, in addition to the self-weight of the wall, the compression force received by the retaining wall owing to the application of reinforcement bars also resist the potential sliding of the wall in Case-4 during the seismic action.…”

Section: 𝐹𝑂𝑆 =mentioning

confidence: 99%

“…If there is a lack of fixed connection at the tip of the bars, the mobilized tensile axial force at the reinforcement bars will be significantly smaller which will reduce the mobilized compression force received by the retaining wall. As shown in Equation (19), the compression force plays an important role in resisting the applied seismic earth pressure. The lack of fixed end connection would have eventually reduced the resisting force making the retaining wall vulnerable to a potential collapse.…”

Section: Ta B L Ementioning

confidence: 99%

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Novel performance‐based seismic reinforcement method for the dry masonry retaining wall located in an urban residential area

Sano,

Sahare,

Itoh

et al. 2024

Earthq Engng Struct Dyn

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In Japan, recently there has been an increase in the failure of dry masonry retaining walls located in an urban residential area due to strong earthquakes. However, currently there are no established optimal seismic reinforcement methods for such dry masonry retaining walls due to issues related to workability and construction cost. This paper presents a novel reinforcement method wherein the tilting reinforcement bars were installed from top of the retaining wall whose individual blocks were integrated. A detailed investigation and discussion on the mechanical behavior of a dry masonry retaining wall is made by comparing the results among different experimental cases which had different seismic reinforcement treatment with the help of tilting table experiments conducted in a geotechnical centrifuge. The results highlighted that the proposed method, the application of tilting reinforcement bars together with the integration of individual wall blocks, led to the best seismic resilient performance of the retaining wall with the least measured soil deformations and soil strains at the backfill. Among all the tested cases, the proposed method resulted in the least mobilization of axial force and bending moment at the top of reinforcement bars which may result in the overall reduction of the construction cost (i.e., by reducing the number of reinforcement bars) aiming toward a performance‐based design. Lastly, an analytical evaluation of the factor of safety (FOS) against collapse as per the Mononobe‐Okabe theory was made which was found to be in excellent agreement with the centrifuge experiments revealing the proposed method to perform best among all the cases.

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Section: Proposed Methodologymentioning

confidence: 99%

Section: Proposed Methodologymentioning

confidence: 99%

Section: 𝐹𝑂𝑆 =mentioning

confidence: 99%

Section: Ta B L Ementioning

confidence: 99%

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