日本地球惑星科学連合2019年大会

講演情報

[J] ポスター発表

セッション記号 H (地球人間圏科学) » H-DS 防災地球科学

[H-DS15] 人間環境と災害リスク

2019年5月30日(木) 17:15 〜 18:30 ポスター会場 (幕張メッセ国際展示場 8ホール)

コンビーナ:青木 賢人(金沢大学地域創造学類)、近藤 久雄(産業技術総合研究所 活断層・火山研究部門)

[HDS15-P03] Validation and application of a finite element approach on field mechanically stabilized earth walls with secondary reinforcement

*BING-RU WU1CHIH-HSUAN LIU1CHING HUNG1 (1.National Cheng Kung University)

キーワード:retaining structure, MSE wall, controlling factors, secondary reinforcement, finite element

Mechanically stabilized earth (MSE) walls have been used widely to prevent slopes from natural disasters around the world. The typical vertical spacing of geosynthetic reinforcement used in the practical MSE wall may cause high reinforcement connection strength and lead to wall-facing bulging. Previous studies show that installing short (secondary) reinforcement layers in-between primary reinforcement layers could mitigate these problems by reducing wall facing deflection and primary reinforcement strains, increasing the wall internal stability, alleviating down-drag forces behind the wall facing, and so on. Although the performance of the secondary reinforcement has been widely examined, its controlling factors (i.e., length, spacing, distribution) on the behavior of MSE wall are scarcely studied. In this study, a finite element approach was validated via a benchmark field case and was applied to understand the effect of the controlling factors on the behavior of MSE wall as well as giving a guidance on the design of MSE wall with secondary reinforcement.