Structural Engineering and Mechanics

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Numerical modeling of dynamic compaction process in dry sands considering critical distance from adjacent structures

  • Received : 2014.05.06
  • Accepted : 2015.09.15
  • Published : 2015.10.10
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Abstract

Dynamic compaction (DC) is a useful method for improvement of granular soils. The method is based on falling a tamper (weighting 5 to 40 ton) from the height of 15 to 30 meters on loose soil that results in stress distribution, vibration of soil particles and desirable compaction of the soil. Propagation of the waves during tamping affects adjacent structures and causes structural damage or loss of performance. Therefore, determination of the safe or critical distance from tamping point to prevent structural hazards is necessary. According to FHWA, the critical distance is defined as the limit of a particle velocity of 76 mm/s. In present study, the ABAQUS software was used for numerical modeling of DC process and determination of the safe distance based on particle velocity criterion. Different variables like alluvium depth, relative density, and impact energy were considered in finite element modeling. It was concluded that for alluvium depths less than 10 m, reflection of the body waves from lower boundaries back to the soil and resonance phenomenon increases the critical distance. However, the critical distance decreases for alluvium depths more than 10 m. Moreover, it was observed that relative density of the alluvium does not significantly influence the critical distance value.

Keywords

References

  1. Arslan, H., Baykal, G. and Ertas, O. (2007), "Influence of tamper weight shape on dynamic compaction", Ground Improv., 11(2), 61-66. https://doi.org/10.1680/grim.2007.11.2.61
  2. Chow, Y.K., Yong, D.M., Yong, K.Y. and Lee, S.L. (1990), "Monitoring of dynamic compaction by deceleration measurements", Comput. Geotech., 10(3), 189-209. https://doi.org/10.1016/0266-352X(90)90035-T
  3. Chow, Y.K., Yong, D.M., Yong, K.Y. and Lee, S.L. (1992), "Dynamic compaction analysis", Geotech. Eng., 118(8), 1141-1157. https://doi.org/10.1061/(ASCE)0733-9410(1992)118:8(1141)
  4. Chow, Y.K., Yong, D.M., Yong, K.Y. and Lee, S.L. (1994), "Dynamic compaction of loose granular soils: effect of print spacing", Geotech. Eng., 120(7), 1115-1133. https://doi.org/10.1061/(ASCE)0733-9410(1994)120:7(1115)
  5. Das, B.M. (1993), Principle of Soli Dynamics, PWS-KENT, America.
  6. Feng, S.J., Shui, W.H., Gao, W.H., He, L.J. and Tan, K. (2010), "Field evaluation of dynamic compaction on granular deposits", Perform. Constr. Facil., 25(3), 241-249.
  7. Ghassemi, A., Pak, A. and Shahir, H. (2010), "Numerical study of the coupled hydro-mechanical effects in dynamic compaction of saturated granular soils", Comput. Geotech., 37, 10-24. https://doi.org/10.1016/j.compgeo.2009.06.009
  8. Hamidi, B., Nikraz, H. and Vaeaksin, S. (2011), "Dynamic compaction monitoring in a saturated site", Intentional Conference on Advances in Geotechnical Engineering, Australia pp. 267-272
  9. Hua, L.J., Bo, Y.J., Hu, X. and Wei, C. (2008), "Dynamic compaction treatment technology research of red clay soil embankment in southern mountains", J. Central South Univ. Tech., 15, 50-57. https://doi.org/10.1007/s11771-008-0435-7
  10. Hwang, J.H. and Tu, T.Y. (2006), "Ground vibration due to dynamic compaction", Soil Dyn. Earthq. Eng., 26, 337-346. https://doi.org/10.1016/j.soildyn.2005.12.004
  11. Jafarzadeh, F. (2006), "Dynamic compaction method in physical model test", Scientia Iranica, 13, 187-192.
  12. Jahangiri, Gh., Pak, A. and Ghassemi, A. (2010), "A novel numerical method for determination of print spacing in dynamic compaction operation of dry sand", 4th International Conference on Geotechnical Engineering and Soil Mechanics, Tehran.
  13. Jia, M. and Zhou, J. (2010), "Investigation of mechanical response induced in dynamic compaction of sandy soils with PFC2D", GeoShanghai 2010 International Conference, 261-268.
  14. Kramer, S.L. (1996), Geotechnical Earthquake Engineering, Prentice Hall, America.
  15. Li, W., Gu, Q., Su, L. and Yang, B. (2011), "Finite element analysis of dynamic compaction in soft foundation", Procedia Eng., 12, 224-228. https://doi.org/10.1016/j.proeng.2011.05.035
  16. Lukas R.G. (1995), "Geotechnical engineering circular No. 1- Dynamic compaction", FHWA-SA-95-037.
  17. Mayne, P.W. and Jones, J.S. (1983), "Impact stresses during dynamic compaction", Geotech. Eng., 109(10), 1342-1346. https://doi.org/10.1061/(ASCE)0733-9410(1983)109:10(1342)
  18. Mayne, P.W., Jones, J.S. and Dumas, J.C. (1984), "Ground response to dynamic compaction", Geotech. Eng., 110(6), 757-774. https://doi.org/10.1061/(ASCE)0733-9410(1984)110:6(757)
  19. Mayne, P.W. (1985), "Ground vibrations during dynamic compaction", Vibration Problems in Geotechnical Engineering, Proceeding of a symposium sponsored by the geotechnical Engineering Division, ASCE Detroit, Michigan, 247-265
  20. Menard, L. and Broise, Y. (1975), "Theoretical and practical aspects of dynamic consolidation", Geotechnique, 25(1), 3-16 https://doi.org/10.1680/geot.1975.25.1.3
  21. Minaev, O.P. (2002), "Effective method for dynamic compaction of slightly choesivesaturated soils", Soil Mech. Found. Eng., 39(6), 208-213. https://doi.org/10.1023/A:1022501205546
  22. Oshima, A. and Takada, N. (1997), "Relation between compacted area and ram momentum by heavy tamping", 14th International Conference on Soil Mechanics and Foundation Engineering, 3, 1641-1644.
  23. Pan, J.L. and Selby, A.R. (2002), "Simulation of dynamic compaction of loose granular soils", Adv. Eng. Softw., 33, 631-640. https://doi.org/10.1016/S0965-9978(02)00067-4
  24. Pourjenabi, M., Ghanbari, E. and Hamidi, A. (2013), "Numerical modeling of dynamic compaction in dry sand using different constitutive models", 4th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering.
  25. Roesset, J.M., Kausel, E., Cuellar, V., Monte, J.L. and Valerio, J. (1994), "Impact of weight falling onto the ground", Geotech. Eng., 120(8), 1394-1412. https://doi.org/10.1061/(ASCE)0733-9410(1994)120:8(1394)
  26. Rollins, K.M. and Kim, J. (2010), "Dynamic compaction of collapsible soils based on U.S. case histories", Geotech. Geoenviron. Eng., 136(9), 1178-1186. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000331
  27. Zou, W.L., Wang, Z. and Yao, Z.F. (2005), "Effect of dynamic compaction on placement of high-road embankment", Perform. Constr. Facil., 19(4), 316-323. https://doi.org/10.1061/(ASCE)0887-3828(2005)19:4(316)

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