3D Numerical investigation of excavation in sandy ground reinforced using different types of geosynthetics

Document Type : Research Paper

Authors

Civil Engineering Department, Engineering Faculty, Razi University, Kermanshah, Iran

Abstract

Stabilization of excavations and retaining walls are important issues in geotechnical field. Use of new and novel methods in excavation sites, and providing safe condition for the final aim of project is one of the challenging matters in this regard. Excavation in sandy soils, due to lack of enough cohesion for its stability, face serious problems. In order to solve this problem, using special techniques to improve the stability is very important subject. Geosynthetics (i.e. geotextile, geogrid, and geocell) are among the new techniques, which could enhance the stability and performance of sandy soils. In this research, 3D finite different analysis performed to investigate unreinforced and reinforced excavations using geotextile, geogrid, and geocell elements and their comparison. Results indicated that in the case of using geotextile, geogrid, and geocell the critical depth of excavation increased up to 3.125, 2.75, and 2.25 times of unreinforced excavation, respectively.

Keywords

References

[1] Puller, M. (2003). Deep Excavations Practical Manual. 2nd edition, Thomas Telford Limited.
[2] Lawson, C.R., Yee, T.W., & Choi, J.C. (2004). Segmental block retaining walls with combination geogrid and anchor reinforcements. In Proceedings of Geosynthetics. Korean Geosynthetics Society, Seoul, South Korea, 207-216.
[3] Hatami, K., & Bathurst, R.J. (2004). Verification of a numerical model for reinforced soil segmental retaining walls. Slopes and retaining structures under static and seismic conditions. ASCE proceedings.
[4] Ma, C.C., & Wu, J.T.H. (2004). Field performance of an independent full-height facing reinforced soil wall. Journal of Performance of Constructed Facilities, ASCE, 165-172.
[5] Desai, C.S., & El-Hoseiny, K.E. (2005). Prediction of field behavior of reinforced soil wall using advanced constitutive model. Journal of Geotechnical and Geoenvironmental Engineering, 131(6), 729-739.
[6] Shinde, A.L., & Mandal, J.N. (2007). Behavior of reinforced soil retaining wall with limited fill zone. Geotechnical and Geological Engineering, 25, 657-672.
[7] Taromi, M., & Eftekhari, A. (2018). Tunnel design and construction process in difficult ground conditions with Analysis of Controlled Deformations (ADECO) approach; a Case Study. International Journal of Mining and Geo-Engineering, 52(2), 149-160.
[8] Darvishpour, A., Ghanbari, A., Hosseini, S.S.A., & Nekooei, M. (2017). A 3D analytical approach for determining natural frequency of retaining walls. International Journal of Civil Engineering, 15(3), 363-375.
[9] Hosseinzadeh, S., & Joosse, J.F., (2015). Design optimization of retaining walls in narrow trenches using both analytical and numerical methods. Computers and Geotechnics, 69, 338-351.
[10] Prat, P.C. (2017). Numerical investigation into the failure of a micropile retaining wall. Computers and Geotechnics, 81, 262-273.
[11] Allen, T.M., Bathurst, R.J., & Berg, R.R., (2002). Global level of safety and performance of geosynthetic walls: an historical perspective. Geosynthetic International, 9, 395-450.
[12] Santos, E.C.G., Palmeira, E.M., & Bathurst, R.J. (2013). Behaviour of a geogrid reinforced wall built with recycled construction and demolition waste backfill on a collapsible foundation. Geotextiles and Geomembranes, 39, 9-19.
[13] Bolghonabai, R., Hossaini, M., Mohammadi, M., Nazem, A. (2015). On the selection of an appropriate excavation pattern for urban tunnels with big cross-section: A case study. International Journal of Mining and Geo-Engineering, 49(2), 297-307.
[14] Fukuoka, M. (1988). Earth Reinforcement – West and East. International Geotechnical Symposium on Theory and Practice of Earth Reinforcement, Japan 5-7 October.
[15] Ou, C. (2006). Deep Excavation. Taylor & Francis Group, London, UK.
[16] Hsiung, B.B., (2009). A case study on the behaviour of a deep excavation in sand. Computers and Geotechnics, 36, 665-675.
[17] Hsiung, B.B., Yang, K., 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.
[18] Chen, Y., Zhao, W., Jia, P., Han, J., (2018). Proportion Analysis of Ground Settlement Caused by Excavation and Dewatering of A Deep Excavation in Sand Area. Indian Geotechnical Journal, 48(1), 103-113.
[19] Konai, S., Sengupta, A., Deb, K., (2018). Behavior of braced excavation in sand under a seismic condition: experimental and numerical studies. Earthquake Engineering and Engineering Vibration, 17, 311-324.
[20] Bahrami, M., Khodakarami, M.I., Hadad, A., (2018). 3D numerical investigation of the effect of wall penetration depth on excavations behavior in sand. Computers and Geotechnics, 98, 82-92.
[21] Shi, J., Wei, J., Ng, C.W.W., Lu, H., (2019). Stress transfer mechanisms and settlement of a floating pile due to adjacent multi-propped deep excavation in dry sand. Computers and Geotechnics, 116, 1-13.
[22] Hsiung, B.B., (2019). Observations of the ground and structural behaviours induced by a deep excavation in loose sands. Acta Geotechnica, 1-17.
[23] Loustau, J. (2016). Numerical Differential Equations: Theory and Technique, ODE Methods, Finite Differences, Finite Elements and Collocation. World Scientific.
[24] Sengupta, A. (2012). Numerical Study of Failure of a Reinforced Earth Retaining Wall. Geotechnical and Geological Engineering, 30, 1025-1034.
[25] Keykhosropur, L., Soroush. A., & Iman, R. (2012). 3D Numerical Analyses of Geosynthetic Encased Stone Columns. Geotextiles and Geomembranes, 35, 61-68.
[26] Hegde, A.M., & Sitharam, T.G. (2015). Experimental and Numerical Studies on Protection of Buried Pipelines and Underground utilities using Geocells. Geotextiles and Geomembranes, 43, 372-381.
International Journal of Mining and Geo-Engineering
Volume 56, Issue 1
March 2022
Pages 47-52

Files

Share

How to cite

Statistics