FEM Analysis of the Effect of Using Environmentally Friendly Synthetic Materials on Reducing Pore Pressure in the Core of Rubble Mound Breakwaters

Khorsandi, Nima; Zanganeh Ranjbar, Payam; Neshaei, Seyed Ahmad

doi:10.22124/cse.2023.24252.1053

Document Type : Original Article

Authors

¹ Department of Civil Engineering, Ahrar University, Rasht, Guilan, Iran

² Department of Civil Engineering, Faculty of Engineering, University of Guilan, Rasht, Iran.

³ Department of Civil Engineering, Faculty of Engineering, University of Guilan, Rasht, Iran

https://doi.org/10.22124/cse.2023.24252.1053

Abstract

As a result of the waves crashing into the breakwater, a current will be created inside the breakwater, making the pore pressure. In this study, with the aim of pore pressure reduction, the replacement of environmentally friendly geosynthetic materials as part of the filter layer in the Rubble mound breakwaters (RMB) construction at the coastal area of the Caspian Sea was investigated through the finite element method (FEM) analysis. The results show that using the geodrain and geotextile to replace the filter materials has made an acceptable reduction of pore pressure. The total pore pressure obtained for the selected model was equal to 68.6 kPa, while for the main breakwater, by a decrease of 7.8%, this factor was equal to 74.4 kPa. The materials used as filter layers in RMB have a shallow thickness compared to ordinary filters, which have reduced earthworks volume.

Keywords

References

[1] Rezvani, R. (2020). "Shearing response of geotextile-reinforced calcareous soils using monotonic triaxial tests." Marine Georesources & Geotechnology 38(2): 238-249.

[2] Rezvani, R., I. Hosseinpour and M. Kavoshmelli (2022). "Effect of moisture content on unconfined compressive behavior of geotextile-reinforced clay specimen." Arabian Journal of Geosciences 15(3): 230.

[3] Hosseinpour, I., R. Rezvani and M. Kavoshmelli (2023). "Experimental investigation of the behavior of cemented-clay specimen reinforced with geotextile layers." Journal of Structural and Construction Engineering: -.

[4] Vanneste, D., & Troch, P. A. (2010). Experimental research on pore pressure attenuation in rubble-mound breakwaters. Paper presented at the 32nd International Conference on Coastal Engineering, ICCE 2010.

[5] Troch, P. (2001). Experimental study and numerical modelling of pore pressure attenuation inside a rubble mound breakwater. PIANC Bulletin No, 108.

[6] Jeng, D., Cha, D., Lin, Y., & Hu, P. (2001). Wave-induced pore pressure around a composite breakwater. Ocean Engineering, 28(10), 1413-1435.

[7] De Groot, M., Yamazaki, H., Van Gent, M., & Kheyruri, Z. (1995). Pore pressures in rubble mound breakwaters. Coastal Engineering, pp.1727-1738.

[8] Iranian port and marine structures design regulations. (2006):5-300.

[9] Bruun, P., (2013). Design and construction of mounds for breakwaters and coastal protection. Elsevier.

[10] Liao, C., Tong, D., Jeng, D.-S., & Zhao, H. (2018). Numerical study for wave-induced oscillatorypore pressures and liquefaction around impermeable slope breakwater heads. Ocean Engineering, 157, 364-375.

[11] Zhai, Y., Zhang, J., Jiang, L., Xie, Q., & Chen, H. (2018). Experimental study of wave motion and pore pressure around a submerged impermeable breakwater in a sandy seabed. International Journal of Offshore and Polar Engineering, 28(01), 87-95.

[12] Liu, B., Jeng, D. S., Ye, G. L., & Yang, B. (2015). Laboratory study for pore pressures in sandy deposit under wave loading. Ocean Engineering, 106, 207-219. doi:10.1016/j.oceaneng.2015.06.029

[13] Ashis, M. (2015). Application of geotextiles in coastal protection and coastal engineering works: an overview. Int. Res. J. Environ. Sci, 4(4), 96-103.

[14] Heerten, G. (1984). Geotextiles in coastal engineering—25 years experience. Geotextiles and Geomembranes, 1(2), 119-141.

[15] Holtz, R. D. (2001). Geosynthetics for soil reinforcement. Seattle, Washington.

[16] Sea port and consulting engineers (2008), '' Album of executive plans of east and west breakwaters of Caspian port complex ''.

[17] Müller, W.W. and Saathoff, F., (2015). Geosynthetics in geoenvironmental engineering. Science and technology of advanced materials, 16(3), p.034605.

[18] Desai, A.N. and Kant, R., (2016). Geotextiles made from natural fibres. In Geotextiles (pp. 61-87). Woodhead Publishing.

[19] Koerner, R. M. (2012). Designing with geosynthetics (Vol. 1): Xlibris Corporation.

[20] Wu, H., Yao, C., Li, C., Miao, M., Zhong, Y., Lu, Y. and Liu, T., 2020. Review of application and innovation of geotextiles in geotechnical engineering. Materials, 13(7), p.1774.

[21] Naue Gmbh & Co.KG,)2018). Material specification. Koln, Germany.

[22] Chandrupatla, T.R., Belegundu, A.D., Ramesh, T. and Ray, C., (2002). Introduction to finite elements in engineering (Vol. 10). Upper Saddle River, NJ: Prentice Hall.

[23] Ebadi, M. (2018). Investigation the possibility of using geotextiles as a part of the filter layer in rubble mound breakwater. M.Sc. thesis.

[24] Thaichau, APT Geotextile, (2015). Specifications of Drain”. Ho Chi Minh City, Viet Nam.

[25] Yan, S.W. and Chu, J., (2010). Construction of an offshore dike using slurry filled geotextile mats. Geotextiles and Geomembranes, 28(5), pp.422-433.

Computational Sciences and Engineering

FEM Analysis of the Effect of Using Environmentally Friendly Synthetic Materials on Reducing Pore Pressure in the Core of Rubble Mound Breakwaters

References

References

Volume 3, Issue 1
April 2023
Pages 55-75

FEM Analysis of the Effect of Using Environmentally Friendly Synthetic Materials on Reducing Pore Pressure in the Core of Rubble Mound Breakwaters

References

References

Volume 3, Issue 1April 2023Pages 55-75

Volume 3, Issue 1
April 2023
Pages 55-75