Numerical simulations on dynamic centrifugal model tests of rock slope with countermeasure by prevention piles

Kosuke Hidaka, Makoto Ishimaru, Hiroaki Kobayakawa, Taiji Mazda

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抜粋

To prevent slip in the case of a slope with a weak layer, prevention piles are installed as a countermeasure. However, although the stability evaluation of slopes with prevention piles has been proposed, it has not been fully verified. Therefore, in order to verify the stability of a soft rock slope reinforced by prevention piles, a centrifugal model test and numerical simulations were carried out. When performing dynamic nonlinear analysis on soft rock slopes against large-scale earthquakes, tensile failure frequently occurs in the vicinity of the surface layer. Furthermore, in the case of a slope with a weak layer and prevention piles, it is assumed that tensile failure will occur at the upper part of the weak layer and front part of the prevention piles. When the shear strength and tensile strength are equally reduced to the residual strength, there is a possibility that the simulation results are highly conservative. Originally, introducing the anisotropy of strength and rigidity after failure made it easier to reproduce model test results. However, in dynamic simulations, this is extremely difficult because the conditions change from one moment to the next. Based on this background, in this study, modeling was performed via dynamic nonlinear analyses as a strength characteristic after tensile failure of soft rock by considering the handling of strength after tensile failure. We also focused on the initial shear modulus of the weak layer. The applicability of dynamic nonlinear analyses was considered from the viewpoint of the reproducibility of collapse behavior targeted for the centrifugal model test, which assumed the countermeasure of installing prevention piles in a cut slope with a weak layer.

元の言語英語
ホスト出版物のタイトル5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, YSRM 2019
出版者International Society for Rock Mechanics and Rock Engineering
ページ862-867
ページ数6
ISBN(電子版)9784907430047
出版物ステータス出版済み - 2019
イベント5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, YSRM 2019 - Okinawa, 日本
継続期間: 12 1 201912 4 2019

出版物シリーズ

名前5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, YSRM 2019

会議

会議5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, YSRM 2019
日本
Okinawa
期間12/1/1912/4/19

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Geology

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  • これを引用

    Hidaka, K., Ishimaru, M., Kobayakawa, H., & Mazda, T. (2019). Numerical simulations on dynamic centrifugal model tests of rock slope with countermeasure by prevention piles. : 5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, YSRM 2019 (pp. 862-867). (5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, YSRM 2019). International Society for Rock Mechanics and Rock Engineering.