@article{oai:nied-repo.bosai.go.jp:00002243, author = {中澤 博志 and 原 忠 and 末次 大輔 and 西 剛整 and 栗林 健太郎 and 張 浩 and ハザリカ ヘマンタ and 三好 克明 and 下村 昭司 and 木村 瞬 and 白倉 和也 and 柴原 隆 and 田端 憲太郎}, issue = {426}, journal = {防災科学技術研究所研究資料}, month = {Feb}, note = {2015 年ネパール・ゴルカ地震では,中山間地域において,道路擁壁を始めとする蛇籠構造物が高い 屈撓性を発揮し,その機能を維持した事例が確認された.そこで,蛇籠構造物被害調査の分析結果に 基づき,ネパール現地に多く存在する蛇籠を用いた道路擁壁の耐震性評価のための実大振動台実験を 実施した.蛇籠擁壁断面は,直立壁,階段状および蛇籠の数を増やした重力式の 3 ケースを対象とした. 直立壁については加振後に崩壊には至らなかったものの大きく前傾し,現地調査における幾つかの被 害状況と類似した様相を示した.他2 ケースについては変形が軽微であり,現地に適応可能な構造形 式として有効であると考えられた.最終的には 3 ケースの実験結果に対し FEM による数値解析と試行 くさび法を適用させ,加振後の背後地盤に生じたクラック等の変状箇所と主働崩壊角との比較を通じ, 今後の耐震設計に資する示唆を行うとともに,蛇籠擁壁にも同手法が適用可能であることを示した., In the 2015 Nepal Gorkha Earthquake, the gabion structures such as retaining wall for road showed their high flexibility to maintain their functions in the mountainous areas regardless that many structures were damaged. In this report based on the results of the damage field survey on gabion retaining wall, full-scale shake table tests were conducted and reported to evaluate the earthquake resistance of the retaining wall for road using gabion, which can be seen frequently on site in Nepal. As the cross section of gabion retaining wall, 3 cases of vertical type, stepwise type and gravity type with an increased number of gabions were considered. Comparing the residual deformations of the gabion retaining walls, vertical type did not collapse but tilted forward largely after the shake test, and showed a similar situation to the damage situation confirmed in the filed survey in Nepal. Other two cases suffered only slight deformation and was thought to have the effective structures for application on site. Finally, FEM numerical analysis and trial wedge method were applied to the experimental results of 3 cases. And the suggestion useful for earthquake resistant design in the future was made by comparing the active rupture angles with the positions of the deformation such as crack which occurred in the background after the vibration. Then, it was indicated that trial wedge method could be also applied to gabion retaining wall.}, pages = {1--114}, title = {蛇籠を用いた耐震性道路擁壁の実大振動台実験 および評価手法の開発 被災調査から現地への適用に至るまで}, year = {2019}, yomi = {ナカザワ ヒロシ and ハラ タダシ and スエツグ ダイスケ and ニシ ツヨシ and ハザリカ ヘマンタ and タバタ ケンタロウ} }