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碩士論文公告區 |
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| 年度： | 94 | |
| 姓名： | 林正忠(Cheng-Chung Lin) | |
| 論文題目(中)： | 能高大圳岩石隧道施工進度案例探討 | |
| 論文題目(英)： | A Case Study on the Progress Rate of a Rock Tunnel for Neng-Gao Canal | |
| 摘要(中)： | ||
| 本研究針對能高大圳隧道施工案例，以施工輪進之角度探討小斷面灌溉隧道之施工效率，由研究結果提出影響進度之因素，並建議提昇施工效率之方案，期為能高大圳隧道的開鑿留下歷史資料。 由現場開鑿後的岩體分類可知，本工址以第Ⅲ類及第Ⅳ類岩體為主，且下游段之地質條件優於上游段。開挖輪進平均所需時間呈現岩體條件越差所需耗費時間愈長之現象。各類岩體之開挖時間以鑽孔所占比例最高，其次則為出碴、噴凝土和岩栓打設。研究亦發現第Ⅲ、Ⅳ類岩體之最佳輪進長度為1.5m；當炸出之岩塊粒徑為20~30cm可達較佳之開炸效果。 為節省鑽孔時間，工班並未完全依平滑開炸理念佈置解壓孔，導致開炸不足，後續之修挖作業耗時。為節省作業時間支撐岩栓每2~7輪才合併打設一次，雖能符合Bieniawski 氏免支撐時間的安全範圍內，但有違新奧工法的施工理念。工作編組由全能輪進班改回專業分班，雖不符目前潮流，但較能順應工程界以實作數量計價的習慣，經研究發現，此分班方式對於小斷面隧道施工效率並無降低之情況。工程閒置時間以機具故障所佔比例最高，而601鑽機的損壞又占首位。 |
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| 摘要(英)： | ||
| This study aims directly on the construction of a tunnel for Neng-Gao canal, and focus on tunneling round to investigate the working efficiency of a small irrigating tunnel. The influencing items of tunneling and improving ways on working efficiency were proposed by both statistical analyses and consultation. Therefore, the history of tunneling on Neng-Gao canal was recorded by this research. It was found from the working site, most of in-situ rock can be classified as Type-III and Type-IV, the geological conditions of down stream is better than those of upper stream. The geological condition more weak, the rounding time more long. According to the statistical results, the drilling, the outing derbies, the shotcrete, and the rock bolting dominate the constructing time. From the tunneling test results, the optimum round length of 1.5m was found; the blasting rock diameter of 20cm~30cm could lead a better blasting effect. To cut down the drilling time, workman arranged the relaxing holes did not accord the smooth blasting technology; this acting led lots of continuous breaking time. To reduce the constructing time, rock bolts were installed every 2-7 rounds. Although this way meets the safety range with free support which is proposed by Bieniawski, it contradicts the concept of NATM. A general squad was applied initially; it was changed into several professional divisions due to the engineering custom of counting price by working quantities. However, the efficiency of professional divisions was as well as a general squad in this study. It can be seen from the statistical analyses, the idleness results from machines unavailable mainly, a damaged 601 drilling machine is the main cause. |
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| 檔案： | 沒有相關檔案 | |
| 相關連結： | http://ethesys.lib.cyut.edu.tw/ETD-db/ETD-search-c/view_etd?URN=etd-0731106-044143 | |