--

4 (1) 2014

A case study of braced excavation using steel sheet pile wall in Thi Vai soft clay


Author - Affiliation:
Dao Thi Van Tram - Faculty of Civil Engineering, University of Technology, HCM city , Vietnam
Le Trong Nghia - Faculty of Civil Engineering, University of Technology, Ho Chi Minh City , Vietnam
Nguyen Cong Oanh - Posco Engineering, Representative Office, Ho Chi Minh City , Vietnam
Corresponding author: Nguyen Cong Oanh - pcc_vantram@yahoo.com.vn

Abstract
The paper presents a case study of braced excavation using sheet pile wall in Thi Vai soft clay in South East of Ho Chi Minh city, Vietnam. The study is focusing on stress-strain-displacement behavior with field monitoring of lateral displacement of the wall and settlement of the surrounding area while the 11m excavation of the pump pit was performed. Furthermore, comparison of calculated and monitored data is shown to get insight into actual behavior of the braced cut wall. It is finally found that the ratio between maximum lateral displacement to maximum excavation depth ranging from 1.12%, 3.08% and 3.35% respectively for inclinometers INC-01 to INC-03 and that between surface settlement to maximum excavation depth 0.93% without any failure of the braced excavation and effective stress analysis can be used for getting reasonable and practically accepted values of both lateral displacement and surface settlement.

Keywords
Soft clay; sheet pile; excavation; lateral displacement.

Full Text:
PDF

References

Bjerrum, L. and O. Eide (1956). Stability of Strutted Excavations in Clay. Geotechnique 6(1): 32-48.


Clough, G. W. and T. D. O’Rourke (1990). Construction induced movements of insitu walls. Design and Performance of Earth Retaining Structures. Geotechnical Special Publication. New York, NY, ASCE: 439-470.


Glass, P. R. and A. J. Powderham (1994). Application of the observational method at the Limehouse Link. Géotechnique 44(4): 665–679.


Ikuta, Y., M. Maruoka, et al. (1994). Application of the observational method to a deep basement excavated using the top-down method. Géotechnique 44(4): 655–664.


Nicholson, D., C.-M. Tse, et al. (1999). The observational method in ground engineering: Principles and applications, R185. Construction Industry Research and Information Association.


Peck, R. B. (1969). Advantages and limitations of the observational method in applied soil mechanics. Geotechnique 19(1): 171-187.


Peck, R. B. (1969). State of the art report: Deep excavations and tunneling in soft ground. Seventh International Conference on Soil Mechanics and Foundation Engineering, Mexico City, Sociedad Mexicana de Mecanica de Suelos, A.C., Mexico.


Powderham, A. J. (1994). An overview of the observational method: Development in cut and cover and bored tunnelling projects.» Geotechnique 44(4): 619-636.


Skempton, A. W. and W. H. Ward (1952). Investigations concerning a deep cofferdam in the Thames Estuary clay at Shellhaven. Géotechnique 3(3): 119–139.


Wu, T.-H. and S. Berman (1953). Earth pressure measurements in open cut: Contract D-8 Chicago subway. Géotechnique 3(3): 248–258.


Young, D. K. and E. W. L. Ho (1994). The observational approach to design of a sheetpiled retaining wall. Géotechnique 44(4): 637–654.


Zdravkovic, L., D. M. Potts, et al. (2005). Modelling of a 3D excavation in finite element analysis. Géotechnique 55(7): 497–513.



Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.