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題名 | 板岩地下洞室開挖數值分析及穩定案例探討=Numerical Analysis of Underground Excavate Stabilization in Slate |
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作者 | 廖俊逸; 羅立; 黃崇仁; 林孟德; 李錦浚; Liao, Chun-yi; Luor, Lih; Huang, Chong-ren; Lin, Meng-de; Lee, Chin-chun; |
期刊 | 地工技術 |
出版日期 | 20131200 |
卷期 | 138 2013.12[民102.12] |
頁次 | 頁7-16 |
分類號 | 440.1 |
語文 | chi |
關鍵詞 | 破碎板岩; 大型洞室; 鋼纖維噴凝土; 岩釘; 預力鋼腱; Fracture slate; Large cavern; Steel fiber reinforced shotcrete; Rock bolt; Tendon; |
中文摘要 | 一般而言大型地下洞室開挖均會選擇於地質條件較好之區域,台灣以往建造之大型地下洞室亦多位於岩盤條件較好之工址,本次介紹之地下洞室位於台灣中部大甲溪上游右岸,岩性以板岩為主,有2~3組節理發育,岩心品質(RQD)多小於20且局部夾有剪裂破碎帶,依Bieniawski RMR岩盤分類法屬IV~V類岩盤條件,最大岩覆約70m,為一長49.0m、寬19.6m、高18.0m之大型地下洞室,且於頂拱開挖時曾遭遇小型剪裂帶。本文說明如何採經驗法及數值分析法,並配合觀測法以現地監測資料進行回饋設計,開挖支撐材料部分採新奧工法常用之鋼纖維噴凝土、岩釘、預力鋼腱及臨時鋼支保以維持洞室圍岩先天具有之強度,並協助形成岩拱,維持地下開挖平衡及穩定。 |
英文摘要 | Generally large cavern excavation will be selected in better geological conditions of the area. In the past of Taiwan, most of large caverns is also located at the site of better rock mass .The following large cavern was located at the right bank of Tachia River, which was into hillside about 50m. The dimensions of cavern was 49.0m in length, 19.6m in width, 18.0m in height, and the overburden shown about 70m. According to geological survey, the regional slate bedrock was develop 2~3 sets of joint. The rock quality designation (RQD) value was mostly less than 20, and existing local fracture zone. Overall, the rock mass classification of RMR Bieniawski (1976) should be IV~V in excavation area. Based on site monitoring data, the article described how to ues Barton Q-system empirical method and numerical analysis method to do feedback design. The steel fiber reinforced shotcrete, rock bolt, tendon and temporary steel support were adopted to maintain the strength around the cavern and conformate the rock arch. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。