Interpretation of the Torsional Resistance of Shallowly Embedded Hemiball Penetrometer
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 146, Issue 4
Abstract
The hemiball penetrometer is a geotechnical device developed to measure the property of surficial seabed sediments (), which is of most significance for pipeline design and for situations in which traditional site investigation methods face challenges in accurately characterizing the soil properties. This study developed a novel method to derive the axial frictional resistance along the pipeline through a simple scaling relationship from the torsional resistance measured by the hemiball penetrometer in situ. To achieve this, the undrained and drained torsional resistances of the hemiball for idealized conditions were theoretically explored using the plasticity theory and principles of critical state soil mechanics. The link between undrained and drained torsional resistances for the idealized conditions then was established. Calibrated against those theoretical solutions, coupled finite-element analyses were conducted to explore solutions for more-realistic real-life conditions and to study the effects of hemiball embedment:diameter ratio, initial strength profile, and consolidation after hemiball or pipe installation. Based on these analyses, a simple model using two scaling factors, the effective radius of the hemiball and the equivalent length of the pipe, was proposed to derive the pipe–soil interface friction from the measured torsional resistance of the hemiball. The method presented in this paper provides a simple yet powerful approach for interpretation of hemiball testing results, and is an important step toward the eventual application of the hemiball in deep-water pipeline engineering.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The authors acknowledge the support received from the National Natural Science Foundation of China (Nos. 51709198, 41877214, 51879183, and 51890913), the Natural Science Foundation of Tianjin (Nos. 16JCQNJC07900, and 18JCYBJC40600), China Communications Construction Company Limited (2018-ZJKJ-01), and the Sino-German Mobility Programme (M-0045).
References
Bolton, M., and A. Barefoot. 1997. The variation of critical pipeline trench back-fill properties. Cambridge, UK: Dept. of Engineering, Cambridge Univ.
Chatterjee, S., Y. Yan, M. F. Randolph, and D. J. White. 2012. “Elastoplastic consolidation beneath shallowly embedded offshore pipelines.” Géotechnique Lett. 2 (2): 73–79. https://doi.org/10.1680/geolett.12.00031.
Dassault Systèmes. 2010. Abaqus analysis users’ manual. Providence, RI: Simula Corp.
Hill, A. J., and H. Jacob. 2008. “In-Situ measurement of pipe-soil interaction in deep water.” In Proc., Offshore Technology Conf. Houston: Offshore Technology Conference.
Hill, A. J., D. J. White, D. A. S. Bruton, T. E. Langford, V. Meryer, R. J. Jewell, and J.-C. Ballard. 2012. “New datasets and improved practice for practice for assessment of axial pipe-soil interaction.” In Proc., Int. Conf. on Offshore Site Investigation and Geotechnics. London: Society for Underwater Technology.
Merifield, R. S., D. J. White, and M. F. Randolph. 2009. “The effect of surface heave on the response of partially-embedded pipelines in clay.” J. Geotech. Geoenviron. Eng. 135 (6): 819–829. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000070.
Najjar, S. S., R. B. Gilbert, E. A. Liedtke, and B. McCarron. 2003. “Tilt table test for interface shear resistance between flowlines and soils.” In Proc., Conf. on Offshore Mechanics and Arctic Engineering, Cancun, Mexico: Ocean, Offshore and Arctic Engineering Division.
Pedersen, R. C., R. E. Olson, and A. F. Rauch. 2003. “Shear and interface strength of clay at very low effective stress.” Geotech. Test. J. 26 (1): 71–78. https://doi.org/10.1520/GTJ11104J.
Randolph, M. F., D. J. White, and Y. Yan. 2012. “Modelling the axial soil resistance on deep water pipelines.” Géotechnique 62 (9): 837–846. https://doi.org/10.1680/geot.12.OG.010.
Roscoe, K. H., and J. B. Burland. 1968. On the generalised stress-strain behaviour of ‘wet clay’. In Engineering plasticity. Cambridge, UK: Cambridge University Press.
Stanier, S. A., and D. J. White. 2015. “Shallow penetrometer penetration resistance.” J. Geotech. Geoenviron. Eng. 141 (3): 04014117. https://doi.org/10.1061/(ASCE)GT.1943-5606.0001257.
White, D. J., S. A. Ganesan, M. D. Bolton, D. A. S. Bruton, J.-C. Ballard, and T. E. Langford. 2011. “SAFEBUCK JIP—Observations of axial pipe-soil interaction from testing on soft natural clays.” In Proc., Offshore Technology Conf. Houston, TX: Offshore Technology Conference.
White, D. J., C. Gaudin, N. Boylan, and H. Zhou. 2010a. “Interpretation of T-bar penetrometer tests at shallow embedment and in very soft soils.” Can. Geotech. J. 47 (2): 218–229. https://doi.org/10.1139/T09-096.
White, D. J., A. J. Hill, Z. Westgate, and J.-C. Ballard. 2010b. “Observations of pipesoil response from the first deep water deployment of the SMARTPIPE.” In Proc., 2nd Int. Symp. on Frontiers in Offshore Geotechnics., 851–857. Southampton, UK: University of Southampton Institutional Repository.
Wroth, C. P. 1984. “The interpretation of in-situ soil tests.” Géotechnique 34 (4): 449–489. https://doi.org/10.1680/geot.1984.34.4.449.
Yan, Y. 2013. “Novel methods for characterising pipe-soil interaction forces in-situ in deep water.” Ph.D. thesis, Centre for Offshore Foundation Systems, Univ. of Western Australia.
Yan, Y., D. J. White, and M. F. Randolph. 2010. “Investigations into novel shallow penetrometers for fine-grained soils.” In Proc. 2nd Int. Symp. on Frontiers in Offshore Geotechnics, 321–326. Southampton, UK: University of Southampton Institutional Repository.
Yan, Y., D. J. White, and M. F. Randolph. 2011. “Penetration resistance and stiffness factors for hemispherical and toroidal penetrometers in uniform clay.” Int. J. Geomech. 11 (4): 263–275. https://doi.org/10.1061/(ASCE)GM.1943-5622.0000096.
Yan, Y., D. J. White, and M. F. Randolph. 2014. “Cyclic consolidation and axial friction for seabed pipelines.” Géotechnique Lett. 4 (3): 165–169. https://doi.org/10.1680/geolett.14.00032.
Yan, Y., D. J. White, and M. F. Randolph. 2017. “Elastoplastic consolidation solutions for scaling from shallow penetrometers to pipelines.” Can. Geotech. J. 54 (6): 881–895. https://doi.org/10.1139/cgj-2016-0286.
Information & Authors
Information
Published In
Copyright
©2020 American Society of Civil Engineers.
History
Received: Jul 31, 2018
Accepted: Oct 28, 2019
Published online: Jan 21, 2020
Published in print: Apr 1, 2020
Discussion open until: Jun 21, 2020
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.