隧道施工湧水評估之半解析方法

A Semi-Analytical Approach for Groundwater Evaluation in Tunneling

耿慶志(Ching-Chi Geng)

《地工技術》 52期 (1995/12) Pp. 95-102

https://doi.org/10.30140/SG.199512.0002

摘要

本文介紹以地下水力學原理所發展之分析、評估隧道開挖湧水量及水位下降之半解析方法。利用鏡像法及疊加原理將有限空間問題轉化為無限空間問題，再利用捲積與反捲積方法將變流量問題轉化為定流量問題。根據上述方法可得出不同水文地質條件下隧道開挖之湧水分析公式。初步檢驗結果顯示，計算結果與相應情形下之實際湧水量頗為接近。

關鍵字

隧道開挖 ； 地下水 ； 湧水量 ； 洩降 ； 半解析法

並列摘要

This paper presents a semi-analytical approach for the evaluation of the groundwater inflow and drawdown in tunneling. Using the image method and the superposition principle, the problem in a finite domain is transformed to a problem in an infinite domain. Using the convolution-deconvolution method, the problem of time-variant inflow is transformed to a problem of constant inflow. Several calculation formulas corresponding to some current hydrogeological configurations are developed and discussed in this paper. The comparison of the calculated inflow to the observed one shows that this approach can give quite reliable results, with relatively simple computation compared to the numerical methods.

並列關鍵字

tunnelling ； groundwater ； inflow ； drawdown ； semi-analytical approach