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Strengthening of the soft soil loaded with heavy construction traffic based on dilatometer tests
DOI:
https://doi.org/10.24425/ace.2021.138518Abstract
The presence of soft soil of river and organic genesis in the basement of road embankments creates problems related to their high deformability. Difficult to assess water permeability, affecting the course of the consolidation and settlement process, requires field studies, such as dilatometer tests. In engineering practice, there are many factors that can affect the basement consolidation process, but they are not simply applied to theoretical models. In many cases, only the observational method allows the selected computational approach to be applied to a specific engineering problem. For this reason, it is one of the approaches strongly emphasized by Eurocode 7. The article presents an example of the application of a temporary load from heavy construction traffic to the consolidation of soft soil under service roads with verification of the subsoil parameters using the dilatometer tests. A horizontal layer of weak soil, loaded with a vertical external load caused by temporary traffic, was assumed for the calculations. For such an arrangement, the classical solution of uniaxial Terzaghi’s consolidation with the water flow in the vertical direction was applied. A computational analysis of the consolidation time and maximum settlement values was performed.References
[1] M. Bajda, et al., “Ocena parametrów gruntów organicznych do projektowania wzmocnienia podłoża drogi ekspresowej na podstawie badan in situ”. Acta Scientiarum Polonorum Architectura, vol. 17, no. 2, pp. 107-114, 2018, DOI: 10.22630/ASPA.2018.17.2.19.
[2] J.B. Burland, “On the compressibility and shear strength of natural clays”. Geotechnique, vol. 40, no. 3, pp. 329-378, 1990, DOI: 10.1680%2Fgeot.1990.40.3.329.
[3] P. Carlsten, “The use of preloading when building roads in peat”. Proceedings of the 2nd Baltic Conference on Soil Mechanics and Foundation Engineering, pp. 135-143, Tallin 1988.
[4] B.M. Das, “Principles of geotechnical engineering”. PWS Publishers, Boston 1985.
[5] T. Godlewski and M. Wszędyrówny-Nast, “Correlations of regional geotechnical parameters on the basis of CPTU and DMT tests”. Proc. of 13th Baltic Sea Geotechnical Conference, Vilnius Gediminas Technical University Press, pp. 22-27, 2016, DOI: 10.3846/13bsgc.2016.002.
[6] E.J. den Haan, “One-dimensional behavior. Advances in understanding and modeling the mechanical behaviour of peat”. A.A. Balkema, pp. 131-143, Rotterdam 1994.
[7] J. Hartlén and W. Wolski, “Embankments on organic soils”. Elsevier, 1996.
[8] K. Józefiak and A. Zbiciak “Secondary consolidation modelling by using rheological schemes”. MATEC Web of conferences 117, XXVI R-S-P Seminar Theoretical foundation of civil engineering, 2017, DOI: 10.1051/matecconf/201711700069.
[9] R. Kuszyk, “Geological-engineering documentation for South Warsaw Ring in km 3 + 455 to km 18 + 95000. Warsaw, 2016.
[10] S. Lacasse and T. Lunne, “Calibration of dilatometer correlations”. Proc. Int. Symp. on Penetration Testing ISOPT-1”. Orlando, FL, pp. 539-548, 1988.
[11] S. Marchetti, et al., “Use of the flat dilatometer test - manual”, 2001. https://www.marchetti-dmt.it/wp-content/uploads/bibliografia/totani_2001_bali_summary.pdf.
[12] Z. Meyer and G. Mrozińska, “Estimation of parameters in empirical model of peat consolidation”. Second international seminar on environment protection - regional problems, Kalmar, Sweden, September 7-8/1992.
[13] Z. Młynarek , J. Wierzbicki, and M. Long, “Factors affecting CPTU and DMT characteristics in organic soils”. Proc. Of 11th Baltic Sea Geotechnical Conference, Geotechnics in Marintime Engineering, Gdansk, pp. 407-417, 2008.
[14] R.B Peck and K. Terzaghi, “Soil mechanics in engineering practice”. John Wiley and Sons, New York 1967.
[15] M.A. Rahal and A.R. Vuez, “Analysis of settlement and pore pressure induced by cyclic loading of soil”. Journal of Geotechnical and Geoenvironmental Engineering, vol. 124, no. 4, pp. 1208-1210, 1998.
[16] G. Totani, M. Calabrese, and P. Monaco, “In Situ Determination of ch by Flat Dilatometer (DMT)”. Proc., 1st Int. Conf. on Site Characterization, Balkema, pp. 883-888, 1998. https://www.researchgate.net/publication/264909386_In_situ_determination_of_ch_by_flat_dilatometer_DMT.
[17] EN 1997-1. Eurocode 7. Geotechnical design. Part 1. General rules.
[18] EN ISO 22476-5. Geotechnical investigation and testing. Field testing. Part 5: Flexible dilatometer test.
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