平行三孔隧道開挖之三維度有限元素分析

Three Dimensional Finite Element Analysis of Three Parallel Tunnels Under Excavation

陳君聖(Chun-Sheng Chen) ； 王建力(Chein-Lee Wang)

《鑛冶：中國鑛冶工程學會會刊》 42卷4期 (1998/12) Pp. 58-68

https://doi.org/10.30069/MM.199812_42(4).0008

摘要

本研究利用泛用型有限元素分析程式ANSYS，先對岩體參數進行反算分析，然後進行三維度之無支撐三孔隧道開挖模擬，以三維度之方式直接模擬前進面效應，藉以分析各隧道於不同開挖進度及開挖順序下之相互影響。本研究發現：1.三維度模式能直接模擬隧道開挖問題。2.開挖順序對隧道之最終變形量具有相當影響。3.數值模擬結果顯示導坑隧道受主坑開挖影響明顯。4.數值模擬所得變形結果均較實際監測值為大。

關鍵字

隧道 ； 有限元素分析

並列摘要

The three dimensional numerical simulation of the three parallel tunnels under excavation ha s been conducted by a multi-purpose finite element analysis package, ANSYS. The effect of tunnel deformation due to the excavation sequence and the interaction between adjacent tunnels have been investigated. In this study, it is found: 1. The sequences of tunnel excavation can be conveniently monitored and modeled by a three dimensional approach of analysis. 2. The different sequences of tunnel excavation result in the different plastic flow conditions of the rocks, thus have a substantial effect on the final deformation of the tunnels. 3. The interaction between the pilot tunnel and the main tunnel have a greater effect than the one between two main tunnels. 4. This study predicts a higher tunnel deformation than the results from the in-situ measurements.

並列關鍵字

Tunnel ； Finite Element Analysis