* Corresponding Author
Influence of Pre-Stressing on Tieback Retaining Wall for Sandy Soils Excavations
https://doi.org/10.22146/jcef.61564 Anthonius Steven Sutanto(1*), Paulus Pramono Rahardjo(2), Aswin Lim(3)
(1) Department of Civil Engineering, Universitas Katolik Parahyangan, Bandung, INDONESIA Jalan Ciumbuleuit No. 94 Bandung
(2) Department of Civil Engineering, Universitas Katolik Parahyangan, Bandung, INDONESIA Jalan Ciumbuleuit No. 94 Bandung
(3) Department of Civil Engineering, Universitas Katolik Parahyangan, Bandung, INDONESIA Jalan Ciumbuleuit No. 94 Bandung
(*) Corresponding Author
Abstract
Pre-stressed ground anchor systems or tieback systems are commonly used at wide and irregular-shaped excavations, with the advantage of lower cost and ease of construction compared to the braced excavations, but they come with the drawback on permits for excavations near buildings and tunnels. Research on tieback systems in sands was generally conducted. However, the studies on the correlation between the retaining wall deflection and pre-stress force are few. The objectives of this paper are to study the influence of pre-stress force, depth of excavation, wall embedment length, and soil shear strength that is represented by soil friction angle on the deflection and soil pressure acting on the retaining wall. The parametric study was conducted on an excavation in sand using the finite element method with the Hardening soil model. The results showed that a 50 kN/m increase in pre-stress force reduced the wall deflection on top of the wall by 0.005–0.083% of excavation depth. However, the pre-stressing influence in reducing wall deflection at excavations became less significant along with the sand density increase due to higher friction angle contribution to excavation stability. Moreover, the pre-stress force needed for stabilization of the wall with long embedment length is smaller than those on the wall with shorter embedment length, since the embedment length increase of 0.25 times of excavation depth reduces wall top deflection by 0.002–0.095% of excavation depth. Also, the increase of soil density reduces the need for wall embedment length, so at dense sand, the embedment length of 0.5 times of excavation depth is sufficient to support the excavation.
Keywords
Full Text:
PDFReferences
Birid, K., Maitra, S., Choudhury, D., Beniwal, M., 2020. Nearshore deep excavation and associated problems in cohesionless soil. Proceedings of the Institution of Civil Engineers – Forensic Engineering, 173(2), 54–61.
Chen, J.R., 2004. Axial Behavior of Drilled Shafts in Gravelly Soils, New York: Ph.D. Dissertation. Cornell University.
Duncan, J., and Chang, C., 1970. Nonlinear Analysis of Stress and Strain in Soils. Journal of the Soil Mechanics and Foundations Division, 96(5), 1629–1653.
Elbaz, K., Shen, S.L., Tan, Y., Cheng, W.C., 2018. Investigation into Performance of Deep Excavation in Sand Covered Karst: A Case Report, Soils and Foundations, 8(4), 1042–1058.
Elhakim, A.F. and Tahsin, A., 2011. Post Tensioning Effects on Anchored Diaphragm Walls in Sand. Hong Kong, The 14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering.
Fuentes, R., Pillai, A., Ferreira, P., 2018. Lessons learnt from a deep excavation for future application of the observational method. Journal of Rock Mechanics and Geotechnical Engineering, 10(3), 468–485.
Gibbs, H.J. and Holtz, W.G., 1957. Research on Determining the Density of Sands by Spoon Penetration Testing. London, Proc. 4th Inter. Conf. Soil Mech.
Found. Eng., I, 35. Gouw, T.L., 2014. Common Mistakes on the Application of Plaxis 2D in Analyzing Excavation Problems. International Journal of Applied Engineering Research, 9(21), 8291–8311.
Han, J.Y., Zhao, W., Chen, Y., Jia, P.J., and Guan, Y.P., 2017. Design Analysis and Observed Performance of a Tieback Anchored Pile Wall in Sand, Mathematical Problems in Engineering, 2017, 1–23.
Hatanaka, M. and Uchida, A., 1996. Empirical Correlation between Penetration Resistance and Internal Friction Angle of Sandy Soils. Soils and Foundations, 36(4), 1–9.
Hsiung, B.C.B., Yang, K.H., Aila, W., Hung, C., 2016. Three-Dimensional Effects of a Deep Excavation on Wall Deflections in Loose to Medium Dense Sands. Computers and Geotechnics, 80, 138–151.
Jaky, J., 1944. The Coefficient of Earth Pressure at Rest, Journal of the Society of Hungarian Architects and Engineers (in Hungarian), 8(22), 355–358.
Janbu, N., 1963. Soil Compressibility as Determined by Oedometer and Triaxial Tests. Wiesbaden, European Conf. Soil Mech. Found. Eng. ECSMFE, 1, 19–25, 1963.
Khoiri, M. and Ou, C.Y., 2013. Evaluation of Deformation Parameter for Deep Excavation in Sand Through Case Histories, Computers and Geotechnics, 47, 57–67.
Kondner, R.L. and Zelasko, J.S., 1963. A Hyperbolic Stress Strain Formulation for Sands. Brazil, Proc. 2nd Pan. Am. ICOSFE, 1, 289–394.
Lim, A., Ou, C.Y., and Hsieh, P.G., 2010. Evaluation of Clay Constitutive Models for Analysis of Deep Excavation under Undrained Conditions. Journal of GeoEngineering, 5(1), 9–20.
Mayne, P.W. and Kulhawy, F.H., 1982. K0-OCR Relationships in Soil. Journal of Geotechnical Engineering, 108, 851-872.
Nikolinakou, M.A., Whittle, A.J., Savidis, S., and Schran, U., 2011. Prediction and Interpretation of the Performance of a Deep Excavation in Berlin Sand. Journal of Geotechnical and Geoenvironmental Engineering, 137(11), 1047–1061.
Schanz, T., Vermeer, P.A., and Bonnier, P.G., 1999. The hardening soil model: formulation and verification. Amsterdam, Beyond 2000 in Computational Geotechnics: Ten Years of PLAXIS International, 281–296.
St. Clair, M.J., 2017. Numerical Analysis of the Effect of Pre-Stress on Excavation Supports, Taipei: Master Thesis Report. Department of Civil Engineering. National Taiwan University of Science and Technology.
Teo, P.L. and Wong, K.S., 2012. Application of the Hardening Soil Model in Deep Excavation Analysis. The IES Journal Part A: Civil & Structural Engineering, 5(3), 152–165.
Terzaghi, K. and Peck, R.B., 1948. Soil Mechanics in Engineering Practice. New York: John Wiley. Von Soos, P., 1990. Properties of soil and rock (in German). Grundbautaschenbuch Part 4. Berlin: Ernst & Sohn.
Wang, X.Q., Zhen, T.Y., and Liao, Z.Y., 2019. Deformation Characteristics of Deep Excavation for an Interchange Station Based on the Model of Hardening Soil. Nanjing, International Conference on Civil and Hydraulic Engineering.
DOI: https://doi.org/10.22146/jcef.61564
Article Metrics
Abstract views : 2628
| 
views : 2359
Refbacks
- There are currently no refbacks.
Copyright (c) 2022 The Author(s)
The content of this website is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
ISSN 5249-5925 (online) | ISSN 2581-1037 (print)
Jl. Grafika No.2 Kampus UGM, Yogyakarta 55281
Email : jcef.ft@ugm.ac.id JCEF Stats