Projects per year
Abstract
Deep foundations maybe used in a range of soil types where significant foundation resistance is 10 required but their installation is often associated with disturbance due to noise and vibration. Greater restrictions on use in urban and offshore environments is now commonplace. Screw piles and rotary jacked straight shafted piles are two potential methods of silent piling that could be used as alternative foundation solution, but the effects of certain geometric and installation properties such as installation pitch i.e. the ratio between vertical displacement and rotation, on the required installation torque and force in sand are not well understood. In this paper the effects of installation pitch and base geometry on the installation requirements of a straight shafted pile are simulated in 3D using the discrete element method (DEM). The installation requirements of straight shafted piles into sand have been validated against centrifuge testing, in three different relative densities. The DEM shows reductions in installation force can be achieved by increasing the installation pitch or including a conical tip. An existing cone penetration test (CPT) based prediction method for installation requirements has been improved to include the effects of installation pitch and base geometry for rotary installed piles in sand.
| Original language | English |
|---|---|
| Journal | Canadian Geotechnical Journal |
| Early online date | 19 Aug 2020 |
| DOIs | |
| Publication status | E-pub ahead of print - 19 Aug 2020 |
Keywords
- Discrete Element Method
- Piles
- Cone penetration
Fingerprint Dive into the research topics of 'Using DEM to create a CPT based method to estimate the installation requirements of rotary installed piles in sand'. Together they form a unique fingerprint.
Projects
- 2 Finished
Research output
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Developing screw piles for offshore renewable energy application
Brown, M. J., Davidson, C., Cerfontaine, B., Ciantia, M., Knappett, J. & Brennan, A., 2020, Advances in Offshore Geotechnics: Proceedings of ISOG2019. Haldar, S., Patra, S. & Ghanekar, R. K. (eds.). Singapore: Springer , p. 101-119 19 p. (Lecture Notes in Civil Engineering; vol. 92).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
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Effects of screw pile installation on installation requirements and in-service performance using the Discrete Element Method
Sharif, Y., Brown, M., Cerfontaine, B., Davidson, C., Ciantia, M., Knappett, J., Brennan, A., Ball, J. D., Augarde, C., Coombs, W. M., Blake, A., Richards, D., White, D., Huisman, M. & Ottolini, M., 27 Oct 2020, In: Canadian Geotechnical Journal. 0, p. 1-70Research output: Contribution to journal › Article › peer-review
Open AccessFile -
Incorporating surface roughness into DEM models of crushable soils
Zhang, N., Arroyo, M., Ciantia, M. & Gens, A., 17 Feb 2020, Proceedings of the 5th Itasca Symposium on Applied Numerical Modeling - 2020. Billaux, D., Hazzard, J., Nelson, M. & Schöpfer, M. (eds.). Minneapolis: Itasca International, 4 p. 13-07Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
Open AccessFile
Activities
- 1 Invited talk
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Using DEM to Investigate the Applicability of Screw Piles as an Alternative Solution for Offshore Wind Turbine Foundations
Michael Brown (Speaker) & Yaseen Sharif (Speaker)
25 Nov 2020Activity: Talk or presentation types › Invited talk