| 姓名 | 黃偉明(Wei-Ming Hwang) | 電子郵件信箱 | s8711622@mail.cyut.edu.tw | |
| 畢業系所 | 營建工程系碩士班(Department and Graduate Institute of Constrction Engineering) | |||
| 畢業學位 | 碩士(Master) | 畢業時期 | 90學年第1學期 | |
| 論文名稱(中) | 八卦山卵礫石層隧道施工進度案例探討 | |||
| 論文名稱(英) | CASE STUDY OF BA-GUAH-SHAN GRAVEL TUNNEL PROGRESSING RATE | |||
| 檔案 |
請遵守中華民國著作權法之相關規定，切勿任意重製、散佈、改作、轉貼、播送，以免觸法。 |
論文使用權限 | 校內外完全公開 | |
| 論文語文/頁數 | 中文/128 | |||
| 摘要(中) | 近年來政府加速進行多項重大工程建設，尤其隧道工程在政府推動交通建設中，已佔有舉足輕重地位。又因台彎地質複雜多變，隧道工程施工中可能遭遇情況，不易在規劃設計階段準確評估，致常造成工期及成本無法掌握，成為隧道施工之瓶頸。故隧道工程施工技術提昇、瞭解影響施工進度之主要因素以及改善施工進度方法，已成工程界待努力克服之課題。 環顧目前國內進行的隧道工程，大部份為岩石隧道或土質隧道，而性質介於岩石與土質間之卵礫石層隧道則鮮少見。目前國內對岩石隧道之設計及施工技術已累計有相當多的經驗，惟對卵礫石層隧道之設計與施工之經驗尚缺乏。而目前政府計劃推動之交通建設須在卵礫石層地質施工之工程將有逐年增加趨勢。因而，如何將目前施工所累積之經驗提供給後續施工參考已是刻不容緩之事。 由於國內對卵礫石隧道施工經驗及施工管理之資料乃十分缺乏，本研究選定東西向快速公路漢寶草屯線八卦山隧道為對象，彙集月開挖進度及每輪進施工記錄資料，將不同工作面之資料分別建檔及比較分析。而卵礫石層地質開挖施工受地下水影響很大，為探討其影響性，將本隧道分洞口段、乾燥段、滲(湧)水段及分屬東西口不同承商施作結果，歸納整理出影響本隧道施工進度的主要因素，並由東西口兩工作面做一比較，找出差異，藉由八卦山隧道施工所累積之經驗，來探討卵礫石隧道施工目前為止所遭遇困難與處理對策，找出值得改進之處，以提供爾後礫石層地質隧道工程施工參考。 八卦山隧道自1997年9月進洞迄今對礫石層隧道施工已歷經一段調適期與經驗累積後，至目前為止各工作面月平均進度約在四十多公尺，每輪平均時間在9至14.8小時間，而本工程在乾燥段每月進度可達60公尺以上。然而礫石層在受地下水（滲湧水段）與砂、泥層地質構造影響之區段較與乾燥段之施工性有極大差異，礫石層在受地下水影響與遭遇未固結砂、泥層時穩定性極差，常有抽坍及數次大抽坍災害，致使施工進度大幅減緩，甚有月進度僅數公尺情況。為克服地下水與砂、泥層穩定問題，無論業主，承商均投入龐大成本與時間研擬處理對策，並嘗試配合各種輔助工法施工，才逐漸克服問題，故卵礫石層隧道開挖時如何減少地下水與地質因素之影響，以提昇施工進度，仍有諸多值得探討與改進空間。 | |||
| 摘要(英) | Many large civil
construction projects have been completed or under construction by the
government during the past 15 years. The tunnel construction does
play a significant role for each transportation projects. Because of the
complexity and unpredictable nature of the geology conditions in Taiwan,
the circumstance encountered during construction is not easy to predict
and evaluate during the planning and design stages. Thus, the schedule
and cost of a tunnel construction are hard to control during
construction. Therefore, the enhancement on the tunneling
construction techniques, understanding the key factor affecting the
construction schedule, and the method to improve the construction
progress have become the subjects to be overcome for tunnel
construction. Most of tunnels constructed either in rocks or soils. For gravel formation, which has properties between rock and soil, is seldom encountered in tunnel. In Taiwan, most work experiences in tunnel had been in rock formation. The experience for the design and construction of the gravel tunnel is still lacking. There is going to have many transportation projects constructed in the gravel formation in Taiwan in the future. Therefore‚how to provide the accumulated experience to the successive construction seems to be an urgent task. Due to the shortage of the data on the construction experience and construction management for tunnel in gravel formation, the Ba-Guah-Shan Tunnel in the Hanbou-Chatoe East-West Expressway is selected as the example in this study. The data of monthly excavation progresses and each construction cycle time are synthesized. The Data for different construction faces and geological classifications are compared and analyzed. The excavation progress in gravel formation is greatly affected by the underground water. To study the influence of many factors, the tunnel is divided into the dry and seepage sections, and east and west bounds’ works, which were constructed by different contractors. The key factors affecting the construction schedule have been found and summarized. The data for work experience and corresponding adjustment to the construction for the gravel tunnel have been accumulated since September 1997. The average monthly progress is about forty meters for each construction cycle. The cycling time is 9 to 14.8 hours. In dry section, the tunnel progressing rate can reach sixty meters or more per month. However, the tunnel construction for dry section, seepage or water flowing section, and sand and silty formations has great difference. Many failures have been encountered in sections of seepage and unconsolidated sandy and silty layers. The progressing rate was reduced to only several meters per month for these sections. | |||
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