التفاصيل البيبلوغرافية
| العنوان: |
ESTIMATION OF TUNNELING INDUCED GROUND SETTLEMENT USING PRESSURE RELAXATION METHOD. |
| المؤلفون: |
Shiau, Jim, Sams, Mathew |
| المصدر: |
International Journal of GEOMATE; Nov2017, Vol. 13 Issue 39, p132-139, 8p |
| مصطلحات موضوعية: |
TUNNELS, CLAY minerals, SETTLEMENT of structures |
| مستخلص: |
The prediction of ground settlement caused by tunnelling is frequently estimated using a specified tunnel volume loss, and by applying a semi-empirical method involving the Gaussian equation, and relying on engineer's experiences. One of the key parameters in the semi-empirical method, K, is generally estimated using basic soil classifications, which has the potential to lead to inaccurate judgement from engineers. Better estimation of this constant K has had limited attention by other studies. This research uses a force relaxation technique and the finite difference program, FLAC, to estimate the transverse settlement profile for a range of different scenarios. A number of particular cases are numerically simulated with variation in the factors that influence the tunnel transverse settlement including tunnel depth to diameter ratios (C/D), clay strength ratios (γD/Su), Young's Modulus (E), and volume loss (% of tunnel). Using these settlement profiles, a K parameter can be accurately fitted for each case. Results from this study compare favourably with previous empirical and analytical studies. A range of K values is proposed for any combination of soil strength, Young's Modulus, tunnel geometry, and volume loss. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
