A study on ground surface settlement due to groundwater drawdown during tunnelling

Chung-Sik Yoo; Sun-Bin Kim

doi:None

All Issue

2007 Vol.9, Issue 4 Preview Page Next Page

A study on ground surface settlement due to groundwater drawdown during tunnelling 터널 굴착시 지하수 저하로 인한 지반침하에 관한 연구

31 December 2007. pp. 361-375

PDF XML

Abstract

This paper presents the results of investigation on tunnelling-induced ground surface settlement characteristics in water bearing ground using finite element (FE) stress-pore pressure coupled analysis. Fundamental interaction mechanism of ground and groundwater lowering was first examined and a number of influencing factors on the results of the coupled FE analysis were identified. A parametric study was then conducted on the influencing factors such as rock type, thickness of soil layer, permeability of shotcrete lining, among others. The results indicate that the tunneling-induced groundwater drawdown results in a deeper and wider settlement trough than without groundwater drawdown, and that the Error function approach does not yield satisfactory result in predicting a settlement profile. The results of analysis are summarized so that the relationship between the settlement and the influencing factors can be identified.

Keywords

Tunnelling

Groundwater

Settlement

Finite element analysis

본 논문에서는 터널시공시 지하수 저하를 동반하는 시공조건에서 발생하는 지표침하 특성에 관한 연구내용을 다루었다. 이를 위해 먼저 지하수 저하로 인한 지반침하 문제에 대한 국내외 기존연구내용을 살펴보았으며, 지하수 유동시 응력-간극수압 상호작용이 고려된 유한요소해석 모델을 구축하고 이론적 검증을 통해 유한요소해석 모델의 타당성을 검토하였다. 구축된 유한요소해석 모델을 토대로 다양한 시공조건에 대한 매개변수 연구를 수행하고 그 결과를 토대로 지하수 유동시 지반침하에 영향을 미치는 주요 인자를 검토하였으며, 아울러 터널시공이 지하수 저하를 동반하는 시공조건에서의 지표침하 특성을 기존의 이론과 연계하여 고찰하였다.

키워드

터널굴착

지하수

지표침하

유한요소해석

References

1.ABAQUS Users Manual, Version 6.5. (2005), Hibbitt, Karlsson, and Sorensen, Inc., Pawtucket, Providence, R.I.

2.Attewell, P.B., Yeates, J., Selby, A.R. (1986), “Ground deformation and strain equations”, Soil movements induced by tunneling and their effects on pipeline and structures, Blackie, Glasgow, pp. 53-66.

3.Chai, J.-C., Shen, S.-L., Zhu, H.-H., Zhang, X.-L. (2005), “1D analysis of land subsidence in Shanghai”, Lowland Technology International, Vol. 7, No. 1, pp. 33-41.

4.Chen, C.-X., Pei, S-P. (2001), “Study on the prediction model of land subsidence due to withdrawal of ground-water”, Hydrogeo. and Engrg. Geology, Vol. 25, No. 2, pp. 5-8 (in Chinese)

5.Peck, R.B. (1969), “Deep excavations and tunneling in soft ground”, Proc. 7th Int. Conf. on Soil Mech. And Found. Engrg., 225V29.

6.Qiao, S., Liu B. (2006), “Prediction of ground displace-ment and deformation induced by dewatering of ground-water”, Underground Construction and Ground Movement, pp. 73-79.

7.Shen, S.-L., Tohno, I., Nishaki, M., Miura, N. (2004), “Land subsidence due to withdrawal of deep-groundwater”, Lowland Technology International, Vol. 6, No. 1, pp. 1-8.

8.Shen, S.-L., Tang C.-P. Bai, Y., Xu, Y.S. (2006), “Analysis of settlement due to withdrawal of groundwater around an unexcavated foundation pit”, Underground Construction and Ground Movement, pp. 377-384.

9.Terzaghi, K. (1925), Principles of soil mechanics, Ⅳ-Settlement and consolidation of clay: Engineering News- Record, 95(3), pp. 874-878.

10.Yoo, C. (2005), “Interaction between tunneling and ground-water-numerical investigation using three dimensional stress-pore pressure coupled analysis”, J. of Geotechnical and Geoenvironmental Engineering, Vol. 131, No. 2, pp. 240-250.

11.Xue, Y.-Q., Zhang, Y., Ye, S.-J. (2003), “Land subsidence in China and its problems”, Quaternary Sciences, Vol. 23, No. 6, pp. 585-592 (in Chinese)

12.Xu, Y.S. Shen, S.-L., Tang, C.-P., Jiang, H. (2005), “3D-Analysis of land subsidence based on groundwater flow model”, Rock and Soil Mechanics, Vol. 26 (suppl.): pp. 109-112. (in Chinese)

13.Xu, Y.S. Shen, S.-L., Bai, Y. (2006). “State-of-art of land subsidence prediction due to groundwater withdrawal in China”, Underground Construction and Ground Movement, pp. 58-65.

Information

Publisher :Korean Tunneling and Underground Space Association
Publisher(Ko) :한국터널지하공간학회
Journal Title :Journal of Korean Tunnelling and Underground Space Association
Journal Title(Ko) :한국터널지하공간학회 논문집
Volume : 9
No :4
Pages :361-375

Journal of Korean Tunnelling and Underground Space Association ISSN:2233-8292(Print) 2287-4747(Online) 한국터널지하공간학회 논문집

All Issue