DOI QR코드

DOI QR Code

An analytical investigation of soil disturbance due to sampling penetration

  • Diao, Hongguo (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University) ;
  • Wu, Yuedong (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University) ;
  • Liu, Jian (Shenzhen Graduate School, Harbin Institute of Technology) ;
  • Luo, Ruping (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University)
  • 투고 : 2015.02.16
  • 심사 : 2015.10.28
  • 발행 : 2015.12.25

초록

It is well known that the quality of sample significantly determines the accuracy of soil parameters for laboratory testing. Although sampling disturbance has been studied over the last few decades, the theoretical investigation of soil disturbance due to sampling penetration has been rarely reported. In this paper, an analytical solution for estimating the soil disturbance due to sampling penetration was presented using cavity expansion method. Analytical results in several cases reveal that the soil at different location along the sample centerline experiences distinct phases of strain during the process of sampling penetration. The magnitude of induced strain is dependent on the position of the soil element within the sampler and the sampler geometry expressed as diameter-thickness ratio D/t and length-diameter ratio L/D. Effects of sampler features on soil disturbance were also studied. It is found that the induced maximum strain decreases exponentially with increasing diameter-thickness ratio, indicating that the sampling disturbance will reduce with increasing diameter or decreasing wall thickness of sampler. It is also found that a large length-diameter ratio does not necessarily reduce the disturbance. An optimal length-diameter ratio is suggested for the further design of improved sampler in this study.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China, Central Universities

참고문헌

  1. Andresen, A.A. and Kolstad, P. (1979), "The NGI 54 mm sampler for undisturbed sampling of clays and representative sampling of coarser materials", Proceedings of the International Symposium on Soil Sampling, Singapore, July.
  2. Baligh, M.M., Azzouz, A.S. and Chin, C.T. (1987), "Disturbances due to 'ideal' tube sampling", J. Geotech. Eng., 113(7), 739-757. https://doi.org/10.1061/(ASCE)0733-9410(1987)113:7(739)
  3. Calik, U. and Sadoglu, E. (2014), "Engineering properties of expansive clayey soil stabilized with lime and perlite", Geomech. Eng., Int. J., 6(4), 403-418. https://doi.org/10.12989/gae.2014.6.4.403
  4. Chung, S.G., Kwag, J.M., Giao, P.H., Baek, S.H. and Prasad, K.N. (2004), "A study of soil disturbance of Pusan clays with reference to drilling, sampling and extruding", Geotechnique, 54(1), 61-65. https://doi.org/10.1680/geot.2004.54.1.61
  5. Chow, Y.K. and Teh, C.I. (1990), "A theoretical study of pile heave", Geotechnique, 40(1), 1-14. https://doi.org/10.1680/geot.1990.40.1.1
  6. Clayton, C.R.I., Matthews, M.C. and Simons, N.E. (1995), Site Investigation, (Second Edition), Wiley-Blackwell, London, UK.
  7. Clayton, C.R.I., Siddique, A. and Hopper, R.J. (1998), "Effects of sampler design on tube sampling disturbance-numerical and analytical investigations", Geotechnique, 48(6), 847-867. https://doi.org/10.1680/geot.1998.48.6.847
  8. Georgiannou, V.N. and Hight, D.W. (1994), "The effect of centerline tube sampling strains on the undrained behavior of two stiff overconsolidated clays", Geotech. Test. J., 17(4), 475-487. https://doi.org/10.1520/GTJ10308J
  9. Gibson, R. and Anderson, W. (1961), "In situ measurement of soil properties with the pressuremeter", Civil Eng. Pub. Works Rev., 56(658), 615-618.
  10. Hong, Z. and Han, J.A. (2007), "Evaluation of sample quality of sensitive clay using intrinsic compression concept", J. Geotech. Geoenviron. Eng., 133(1), 83-90. https://doi.org/10.1061/(ASCE)1090-0241(2007)133:1(83)
  11. Horng, V., Tanaka, H. and Obara, T. (2010), "Effects of sampling tube geometry on soft clayey sample quality evaluated by nondestructive methods", Soils Found., 50(1), 93-107. https://doi.org/10.3208/sandf.50.93
  12. Kassir, M.K. and Sih, G.C. (1975), Three-dimensional Crack Problems, Mechanics of Fracture, Noordhoff International Publishing, Dordrecht, Netherlands.
  13. La Rochelle, P., Sarrailh, J., Tavenas, F., Roy, M. and Leroueil, S. (1981), "Causes of sampling disturbance and design of a new sampler", Can. Geotech. J., 18(1), 52-66. https://doi.org/10.1139/t81-006
  14. Lunne, T. and Long, M. (2006), "Review of long seabed samplers and criteria for new sampler design", Mar. Geol., 226(1), 145-165. https://doi.org/10.1016/j.margeo.2005.07.014
  15. Mair, R.J. and Taylor, R.N. (1993), "Prediction of clay behaviour around tunnels using plasticity solutions", Predictive Soil Mechanics-Proceedings of the Wroth Memorial Symposium, Thomas Telford, Oxford, UK, July.
  16. Mo, P.Q., Marshall, A.M. and Yu, H.S. (2014), "Elastic-plastic solutions for expanding cavities embedded in two different cohesive-frictional materials", Int. J. Numer. Anal. Met., 38, 961-977. https://doi.org/10.1002/nag.2288
  17. Nagaraj, T.S., Miura, N., Chung, S.G. and Nagendra, P. (2003), "Analysis and assessment of sampling disturbance of soft sensitive clays", Geotechnique, 53(7), 679-683. https://doi.org/10.1680/geot.2003.53.7.679
  18. Randolph, M.F., Dolwin, J. and Beck, R. (1994), "Design of driven piles in sand", Geotechnique, 44(3), 427-448. https://doi.org/10.1680/geot.1994.44.3.427
  19. Rocchi, G., Vaciago, G., Fontana, M. and Da Prat, M. (2013), "Understanding sampling disturbance and behaviour of structured clays through constitutive modelling", Soils Found., 53(2), 315-334. https://doi.org/10.1016/j.sandf.2013.02.011
  20. Santagata, M.C. and Germaine, J.T. (2002), "Sampling disturbance effects in normally consolidated clays", J. Geotech. Geoenviron. Eng., 128(12), 997-1006. https://doi.org/10.1061/(ASCE)1090-0241(2002)128:12(997)
  21. Shang, J.Q., Tang, Q.H. and Xu, Y.Q. (2009), "Consolidation of marine clay using electrical vertical drains", Geomech. Eng., Int. J., 1(4), 275-289. https://doi.org/10.12989/gae.2009.1.4.275
  22. Tanaka, H. (2000), "Sample quality of cohesive soils: lessons from three sites, Ariake, Bothkennar and Drammen", Soils Found., 40(4), 57-74. https://doi.org/10.3208/sandf.40.4_57
  23. Tanaka, H., Sharma, P., Tsuchida, T. and Tanaka, M. (1996), "Comparative study on sample quality using several types of samplers", Soils Found., 36(2), 57-68. https://doi.org/10.3208/sandf.36.2_57
  24. Voottipruex, P. and Jamsawang, P. (2014), "Characteristics of expansive soils improved with cement and fly ash in Northern Thailand", Geomech. Eng., Int. J., 6(5), 437-453. https://doi.org/10.12989/gae.2014.6.5.437
  25. Wu, Y.D. and van Staveren, M.T. (2005), "Research on high quality continuous sampling techniques", Rock Soil Mech., 26, 275-278.
  26. Yu, H.S. (2000), Cavity Expansion Methods in Geomechanics, Kluwer Academic Publishers, Dordrecht, Netherlands.
  27. Zhu, N. (2005), "Theoretical analysis of soil deformation due to piles jacking", Ph.D. Dissertation; Hohai University, Nanjing, China.

피인용 문헌

  1. Created cavity expansion solution in anisotropic and drained condition based on Cam-Clay model vol.19, pp.2, 2015, https://doi.org/10.12989/gae.2019.19.2.141