深開挖設置地中壁及扶壁之三向度數值分析與成效

Three-Dimensional Numerical Analysis and Performance of Deep Excavation with Cross Walls and Buttress Walls

謝百鈎(Pio-Go Hsieh) ； 林亦郎(Yi-Lang Lin) ； 歐章煜(Chang-Yu Ou)

《中國土木水利工程學刊》 22卷1期 (2010/03) Pp. 11-22

https://doi.org/10.6652/JoCICHE.201003_22(1).0002

摘要

本研究以三向度數值分析程式，對座落於台北盆地，設置地中壁及扶壁的開挖案例進行模擬分析，並與監測資料進行比較，據以建議設置地中壁之深開挖工程的三向度數值分析模擬方法，以及分析參數擇取的原則。除此之外，根據分析結果顯示，地中壁具有類似於連續壁的角隅效應，在距地中壁距離越近之處，地盤位移受到的束制效果越佳；地中壁間距越大，束制效果降低，地盤位移明顯的增加。扶壁的長度愈長，兩側面提供摩擦抵抗愈大，成效跟著提高；對一些預期側向位移較小的斷面，再設置扶壁，僅能提供很小量的束制功效。

關鍵字

深開挖 ； 三向度數值分析 ； 地中壁 ； 扶壁

並列摘要

An excavation case with the installation of cross walls and buttress walls located in Taipei was analyzed using the three-dimensional numerical method. Based on the comparison of field observations and analysis results, the analysis method and its parameter determination procedure were proposed. Furthermore, analysis results indicate that cross wall also exhibits corner effects, similar to diaphragm wall near corners. Ground movements near cross walls were relatively small, compared with those far away from them. The restraining effect of cross walls in reducing ground movements decreases with the increase of the distance between cross walls. The ground movement obviously increases with the increase of the distance between cross walls. The effect of buttress wall in reducing ground movements increases with the increasing length of buttress wall due to the increase of the side frictional resistance. For some sections that deflection was expected smaller, installation of buttress wall will provide little contribution in reducing the ground movement.

並列關鍵字

deep excavation ； three-dimensional numerical analysis ； cross wall ； buttress wall