| 阿里山森林铁路隧道复建工程的设计与施工探讨 |
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| 引用本文： | 李嵘泰,刘弘祥,魏铭辉,黄崇仁,连祥益,沈宜庆,廖一光.阿里山森林铁路隧道复建工程的设计与施工探讨[J].岩土力学,2014,35(8):2325-2334. |
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| 作者姓名： | 李嵘泰 刘弘祥 魏铭辉 黄崇仁 连祥益 沈宜庆 廖一光 |
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| 作者单位： | 1.嘉义大学 森林暨自然资源学系，台湾 嘉义 60004；2.中兴工程顾问股份有限公司，台湾 台北 10570； 3.农业委员会林务局嘉义林区管理处，台湾 嘉义 60049 |
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| 基金项目： | 森林铁路路基修复工程设计及监造委托服务案 |
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| 摘 要： | 2009年8月8日莫拉克台风重创南台湾,嘉义阿里山区72 h的累积雨量高达2 500 mm以上,百年历史的阿里山森林铁道因沿线路基严重流失而停驶。其中两处大崩塌路段的复建工程以顺应自然为原则,采取迂回隧道方式避开崩塌区,需克服沿线地质变化及地下水问题,评估结果是以凿岩机工法及钻爆工法进行开挖。两座隧道的西口段崩积层分别长达109.8、99 m,是隧道开挖阶段的关键地段。隧道开挖支撑设计系依据台湾岩体分类与支撑系统(PCCR系统)及新奥工法的理念,沿线采用先进支撑材料包括超前管棚钢管、桁型钢支护、钢纤维喷射混凝土及自钻式锚杆等,除了可确保施工安全外,亦可提高施工进度。目前两隧道均已贯通且变形量控制均符合安全,说明隧道采用先进支撑方式穿越破碎崩积层段的成效良好,其研究结果可为相关工程设计提供参考。
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| 关 键 词： | 迂回隧道 崩积层 钢管棚 桁型钢支护 钢纤维喷射混凝土 |
| 收稿时间： | 2014-03-31 |
Design and construction of Alishan forest railway tunnel rehabilitation project |
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| LEE Jung-tai,LIU Hong-shiang,WEI Ming-hui,HUANG Chong-ren.Design and construction of Alishan forest railway tunnel rehabilitation project[J].Rock and Soil Mechanics,2014,35(8):2325-2334. |
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| Authors: | LEE Jung-tai LIU Hong-shiang WEI Ming-hui HUANG Chong-ren |
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| Institution: | 1. Department of Forestry and Natural Resources, National Chiayi University, Chiayi, Taiwan 60004, China; 2. Sinotech Engineering Consultants, Ltd., Taipei 10570, China; 3. Chiayi Forest District Office, Forestry Bureau, Chiayi, Taiwan 60049, China |
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| Abstract: | On August 8, 2009, Typhoon Morakot hit southern Taiwan. It carried huge accumulated precipitation of 2,500 mm in 72 hours at Alishan area, and caused catastrophic erosion and landslide. Thus, the hundred-year historic Alishan Forest Railway was suspended due to serious embankment collapses. The rehabilitation principle for these two large embankment collapses followed the natural doctrine. Therefore, the D&B/Mechanical bypass tunnel was adopted to overcome the geological changes and groundwater problem in these two huge landslide areas. The lengths of west portal section colluviums of two tunnels were up to 99 m and 109.8 m, which were the crucial sections of tunneling engineering. The tunnel supporting system design was based on PCCR-system (Rock mass classification of Public Construction Commission) & NATM, and steel pipe roofing, lattice girders, and steel fiber reinforced shotcrete, as well as self-drilling anchors were adopted for increasing the safety and shortening the working days during construction. Currently, two tunnels have been driven through, and the amount of deformation was under control and in accord with safety level. This result indicates that implementation of pre-supporting system in drilling through the crushing colluviums section is effective, and can be used as a reference for the relevant engineering design. |
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| Keywords: | bypass tunnels colluviums steel pipe roofing lattice girders steel fiber reinforced shotcrete |
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