阿里山森林铁路隧道复建工程的设计与施工探讨

发布时间：2018-04-15 03:29

本文选题：迂回隧道 + 崩积层　；参考：《岩土力学》2014年08期

【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。
[Abstract]:On August 8, 2009, Typhoon Morakot hit South Taiwan hard. The accumulated rainfall for 72 hours in Jiayi Alishan area was more than 2 500 mm. The forest railway of Alishan with a history of one hundred years was shut down because of the serious loss of roadbed along the road.In order to conform to the nature, the reconstruction works of two major collapse sections should avoid the collapse area by the way of detour tunnel, which need to overcome the problems of geological changes and groundwater along the line. The evaluation results are excavation by drilling and blasting methods.The caving layer in the Xikou section of the two tunnels is 109.899 m long, which is the key section in the excavation stage of the tunnel.Tunnel excavation support design is based on Taiwan rock mass classification and support system (PCCR system) and the concept of new Austrian engineering method. Along the way, advanced support materials include steel pipe, truss steel support, steel fiber sprayed concrete and self-drilling anchor, etc.In addition to ensuring construction safety, can also improve the progress of construction.At present, both tunnels have been through and the control of deformation is in accord with the safety, which shows that the tunnel adopted advanced support method to pass through the broken caving layer is effective, and the research results can provide reference for the relevant engineering design.
【作者单位】：嘉义大学森林暨自然资源学系;中兴工程顾问股份有限公司;农业委员会林务局嘉义林区管理处;
【基金】：森林铁路路基修复工程设计及监造委托服务案
【分类号】：U459.1

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