頁籤選單縮合
| 題 名 | 重模鹽水坑頁岩的潛變特性之研究=Investigating the Creep Characteristic of the Remold Yenshuikeng Shale |
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| 作 者 | 蔡亞廷; 吳建宏; 林宏明; | 書刊名 | 中華防災學刊 |
| 卷 期 | 8:1 2016.02[民105.02] |
| 頁 次 | 頁45-50 |
| 分類號 | 442.3 |
| 關鍵詞 | 獻肚山深層崩塌; 重模鹽水坑頁岩; 反覆荷重試驗; 飽和三軸潛變; Hsien-du-shan rock avalanche; Remold Yenshuikeng shale; Triaxial cyclic loading; Saturated triaxial creeping; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 本研究以獻肚山深層崩塌前於邊坡發現重力變形與在小林林道所發現之道路隆起為研究之出發點,認為現地岩盤在當時處於殘餘狀態,故本試驗之試體以重模方式探討獻肚山深層崩塌滑動面知鹽水坑頁岩潛變特性。重模方法係利用洛杉磯磨損試驗機將現地鹽水坑頁岩打碎後,以適當之含水量進行重模,並得出長徑比為2:1之試體,在重模過程中記讀沉陷量與時間關係,找出以重模壓密時間7天作為試體製作之歷時。最後利用重模試體施作壓密不排水試驗所得之應力應變曲線關係作為靜、動態飽和不排水潛變試驗強度之設計參考。試驗結果顯示,由應變速率-潛變歷時正規化關係可發現硬化參數較乾燥泥岩低,且其潛變應變速率及潛變歷時以雙對數圖繪出所得之破壞時間(t_f)及最小應變速率(έ_m)關係圖,與前人針對乾燥岩石進行潛變試驗結果比較,發現其位置落在前人結果附近,故深層崩塌滑動面也有機會融入傳統邊坡潛變預警。 |
| 英文摘要 | The gravitational deformation on the slope and the road bulge at the Hsiao-lin path way were precursors of the instable Hsien-du-shan rock avalanche and and were the slope creep. Therefore, the sliding surface of the Hsien-du-shan rock avalanche was assumed in their residual state before Typhoon Morakot. This study discussed the creep characteristic of the sliding surface using remold Yenshuikeng shale sample. In the remolding process, Yenshuikeng shales were broken down using Los Angeles abrasion machine and were remolded with appropriate water contents to make samples of length-diameter ratio 2:1. During the remold process, settlement and time was recorded, and the time required to make a remold sample was 7 days. The stress-strain curves obtained from consolidated undrained triaxial tests were used in dynamic and static undrained creep test as references. Finally, testing results from the normalized velocity- v.s. creeping time history it was found that the hardening parameters were lower than that of dry mudstone. The creeping-strain and creeping time history were plotted with hyperbola to determine the relationship between failure time (t_f) and minimum strain velocity (έ_m). This result indicates the possibility to compile conventional creep-based warning system to the rainfall-induced rock avalanche. |
本系統中英文摘要資訊取自各篇刊載內容。