高度破碎及湧水帶TBM施工技術之案例探討

The Case Study of TBM Construction Techniques in Severely Fractured Zone with High Groundwater Inflow

鄭文隆(Wen-Lon Cheng) ； 張文城(Wen-Cherng Chang)

《地工技術》 66期 (1998/04) Pp. 5-24

https://doi.org/10.30140/SG.199804.0001

摘要

全斷面隧道鑽掘機（TBM）的使用為國內正在萌芽的施工技術，並被首次應用在北宜高速公路的坪林隧道工程。因坪林隧道東端的地質構造甚為複雜且破碎，因此以TBM施工的過程遭遇極大的困難，尤其是在里程39k+079處遭遇極度堅硬而破碎的四稜石英砂岩層，並伴隨壓力高達到20kg/cm^2以上的地下水，以每秒約150公升的流量湧入隧道內，造成TBM無法順利開挖並停機長達兩年。本文旨在詳細說明施工所遭遇之困難與處理所引用之技術與工法，以為爾後使用TBM施工，甚至規劃設計之參考。

關鍵字

迂迴隧道 ； 繞行隧道 ； 水平長距離鑽探

並列摘要

The construction techniques of tunnel boring machine(TBM), which is firstly applied in the Pinglin tunnel of Taipei-Ilan expressway, is founded and been improved domestically. Many difficulties were encountered during the construction of TBM in Pinglin tunnel because of the complicated and fractured geological structure especially at station 39k + 079 of Pinglin pilot tunnel. Large groundwater inflow, I.e. approximately 150 l/s, with high water pressure over 20 kg/cm^2 in hard and highly fractured Szeleng sandstone formation was encountered at station 39k+079 and approximately two years has been consumed to solve the geological difficulties since February 1996. This paper is to present and discuss the difficulties encountered and related construction techniques in the Pinglin tunnel in detail in order to upgrade the related techniques in the future.

並列關鍵字

by pass tunnel ； detour tunnel ； horizontal long distance drilling