An experimental approach to obtain the erosion rate of soils through a piston-type apparatus
DOI:
https://doi.org/10.24849/j.geot.2017.139.03Keywords:
erodibility, erosion rate, piston-type apparatusAbstract
Among the many civil engineering projects, specifically for geotechnics, knowledge of erosive behavior of the soil is very important to the performance of infrastructure works, such as the works of foundations of bridges and dams. Hence, this paper proposes an apparatus able to measure the erodibility of soil exposed to a flow with different flow velocities. In addition, this study presents the results for a sedimentary soil, classified by the unified soil classification system as clayey sand with a high percentage of fine material and moderate plasticity. Through the experiments using the proposed apparatus, it was possible to evaluate the soil erosive class, using the proposition of Briaud et al. (2001) and Arneson et al. (2012), seeking the median erosive rate for each of the five flow velocities and identifying the critical flow velocity which the erosive process began.
Downloads
References
Arneson, L. A.; Zevenbergen, L. W.; Lagasse, P. F.; Clopper, P.E. (2012). Hydraulic engineering circular no. 18: evaluating scour at bridges. 5th ed. FHWA. Washington. Federal Highway Administration. 340p.
ASTM D-2487 (2006). Standard practice for classification of soils for engineering purposes (unified soil classification system). West Conshohocken, Pennsylvania, EUA.
ASTM D-3080M (2011). Standard test method for direct shear test of soils under consolidated drained conditions. West Conshohocken, Pennsylvania, EUA.
Briaud, J-L.; Ting, F. C. K.; Chen, H. C.; Cao, Y.; Han, S. W.; Kwak, K. W. (2001). Erosion function apparatus for scour rate predictions. Journal of Geotechnical and Geoenvironmental Engineering, Reston, v. 127, n.2, pp.105 -113.
Briaud, J-L.; Chen, H. C.; Govindasamy, A. V.; Storesund, R. (2007). Erosion tests on samples from the New Orleans levees. Proceedings of Geo-Denver 2007: New Peaks in Geotechnics, ASCE, pp. 1-16.
Briaud, J-L.; Chen, H. C; Govindasamy, A. V.; Storesund, R. (2008). Levee erosion by overtopping in New Orleans during the Katrina Hurricane. Journal of Geotechnical and Geoenviromental Engineering, Reston, v. 134, n. 5, pp. 618- 632.
Briaud, J-L.; Chen, H. C.; Chang, K. A.; OH, S. J.; Chen., S.; Wang, J.; Li, Y.; Kwak, K.; Nartjaho, P.; Gudaralli, R.; Wei, W.; Pergu, S.; Cao, Y.W.; Ting, F.C.K. (2011). The Sricos-EFA Method. Texas A&M University (summary report). 106 p.
Chanson, H. (2004). The Hydraulics of Open Channel Flow: An introduction. 2nd ed. Oxford: Elsevier, Butterworth e Heinemann. 585 p.
Julien, P.Y. (1998). Erosion and Sedimentation. 2nd ed. New York: Cambridge University Press. 280 p.
Pruski, F.F. (2009). Conservação de solo e água: práticas mecânicas para o controle da erosão hídrica. 2ª ed. Viçosa: Editora UFV. 279 p.
Saliba, A.P.M. (2009). Uma nova abordagem para análise de ruptura por galgamento de barragens homogêneas de solo compactado. Tese de Doutorado – Universidade Federal de Minas Gerais, Belo Horizonte.
Shields, A. (1936). Anwendung der Aenlichkeitsmechanik und der turbulenzforschung auf die geschiebebewegung. Mittleilungen der preussischen versuchsanstalt fur wasserbau und schiffbau. Ott, W. P.; Uchelen J. C. Van, [tradutores], California Institute of Technology, Pasadena, EUA.
Ting, F. C. K.; Briaud, J-L.; Chen, H.C.; Gudavalli, R.; Perugu, S.; Wei, G. (2001). Flume tests for scour in clay at circular piers. Journal of Hydraulic Engineering, Vol. 127, No. 11, pp. 969- 978.
