以經驗公式預測台北盆地深開挖引致之地表沉陷

Prediction Of Excavation-Induced Settlement in Taipei Basin Using Empirical Methods

謝百鉤(Pio-Go Hsieh) ； 歐章煜(Chang-Yu Ou)

《地工技術》 53期 (1996/02) Pp. 5-14

https://doi.org/10.30140/SG.199602.0001

摘要

本文整理現有的各種深開挖引致之地表沉陷的經驗預測方法，以四個觀測良好的實際開挖案例，利用各種經驗預測方法計算沉陷量，再與觀測結果進行比較，確立各經驗預測法之適用性。研究結果發現，無論是凹槽型或三角槽型沉陷型態，Hsieh和Ou的方法均可得到很好的類比。最後本文以有限元素法分析開挖區外地表下不同深度的沉陷情形，並與觀測結果比較，根據分析及比較的結果建議地表下沉陷的預估方法。

關鍵字

台北盆地 ； 深開挖 ； 地表沉陷 ； 經驗公式

並列摘要

This paper summarizes the current empirical methods for estimating ground surface settlements caused by excavation. The different points among the current empirical methods are discussed. Four excavation cases with well documented measurements are used to compare the suitability of these methods. The present study indicates that Hsieh and Ou's method can give good concordance with field measurements for concave type as well as spandrel type of settlement troughs. Besides, ground settlements at various depths behind the wall are studied using finite element method. Based on the analysis results with the field observations, a tentative method for predicting settlement at various depths is then proposed.

並列關鍵字

Taipei basin ； deep excavation ； surface settlement ； empirical formula