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題 名 | 考量落石引致最大衝擊力於明隧道頂板設計之研究=The Maximum Impact Force from a Rock-fall for Rock-Shed Slab Design |
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作 者 | 羅佳明; 張凱傑; | 書刊名 | 中華水土保持學報 |
卷 期 | 46:4 2015.12[民104.12] |
頁 次 | 頁197-204 |
分類號 | 441.9 |
關鍵詞 | 最大衝擊力; 明隧道頂板; 分離元素法; 物理模型試驗; Maximum impact force; Rock-shed slab; Physical experiment; Discrete element method; |
語 文 | 中文(Chinese) |
中文摘要 | 本文主要利用數值模擬評估大規模落石之最大衝擊力,藉此作為國內明隧道頂板結構設計之參考。而數值模擬主要採用分離元素法,經由物理模型試驗進行比對驗證後,進行大規模落石運動過程模擬與衝擊力量測。物理模型試驗結果顯示,落石引致之最大衝擊力主要由落石量、落距與崩落過程等因素影響最為顯著。由全尺度數值模擬結果顯示,其除可滿足物理模型之落石衝擊行為外,對於崩落型式、落石材料與明隧道頂板間之接觸勁度亦可量化出其影響特性,故對於明隧道頂板設計或陡坡危岩處理考量上,應可最為後續研究與工程防護設計之參考。 |
英文摘要 | This study estimates the maximum impact force for a rock-shed slab in a rockfall. A discrete element program is calibrated using small-scale physical experiments and is then used to model the movement for a large scale rock-fall and to measure the impact forces. The results from the small-scale experiments show that the maximum impact forces are significantly affected by the mass of the rock-fall, the height from which the rock falls and the falling process. The full-scale numerical modeling for a field case confirms these experimental results and demonstrates the effect of rock-fall modes and the contact stiffness between the rock and the rock-shed. This study provides guidelines for the design of rock-shed structures where there are large rock-fall problems. |
本系統中英文摘要資訊取自各篇刊載內容。