Regulation of the Bearing Capacity of Sheet Piles in Complex Engineering-Geological Conditions
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Abstract
An analysis of existing methods for assessing the bearing capacity of sheet pile walls on the soil is carried out, considering the partial formation of a soil plug inside the sheet pile profile.
When designing such structures, it is assumed that the bearing capacity of sheet piles under the action of a vertical load consists of the soil resistance under the sheet pile tip and the friction forces on pile’s side surface. These components are determined using decreasing coefficients, which reflect the specific characteristics of the soil plug formation within the sheet pile profile. This results in a reduction in the design bearing capacity of 50-70% for the resistance under the pile tip and up to 50% for the resistance on the side surface (depending on the type of soil).
Therefore, the task is to increase the bearing capacity of sheet piles, which can be achieved by both increasing the components and incorporating new, previously unused elements of soil resistance that interact with sheet piles, considering the specific characteristics of sheet pile profiles. The possibility of increasing the efficiency of perception of axial load by sheet piles during their interaction with the soil media, including inside the sheet pile profiles, is determined.
A new approach to increasing the bearing capacity of retaining walls made of sheet piles of U-section and double piles of Z-section is presented. This approach is based on the transformation of the sheet pile profile on a part of the length of the sheet pile in the soil base from an open section to a closed one.
Such conversion is achieved by adding a cover (steel strip) of a certain length, connected to the flanges of the sheet pile, for example, by welding. Thus, in the area where the cover is located, the sheet pile, from the point of view of the formation of a soil plug, works similarly to a tubular pile. It is shown how the presence of the strip; its dimensions and location change the perception of the external axial load on the sheet pile wall and how the contribution of the cover to the bearing capacity can be adjusted.
The schemes for the application of the proposed approach with a homogeneous and layered soil base, as well as the limitations of the scope of its application, are considered. Design dependencies are proposed to determine the components of the bearing capacity of sheet piles with a cover. The main conditions for the use of sheet piles equipped with strips are determined and analyzed.
Further research directions on the design and technological solution under consideration are determined.
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References
Borel, S., Bustamante, M., Rocher-Lacoste, F. (2006) The comparative bearing capacity of vibratory and impact driven piles. TRANSVIB 2006. Gonin, Holeyman et Rocher-Lacoste (ed.), Editions du LCPC, Paris, 118-127.
Bustamante, M., Gianeselli, L. (1991) Pre-dicting the bearing capacity of sheet piles under vertical load. Proceedings of the 4thInternational Conference on Piling and Deep Foundations -Stresa (Italy), 54-69.
Kwarciński, P. (2008). Nośność pionowa grodzicю. Geoinżynieria: drogi, mosty, tunele . - Т.3, 38-40.
ArcelorMittal Piling Handbook 9th edition (2022)
European Committee for Standardization (2007). Eurocode 7: Geotechnical design - Part 1: General rules.
Heerema, E. P. (1979). Pile driving and stat-ic load tests on piles in stiff clay. Annual Offshore Technology Conference 2, 1135–1145.
Hoesch Spundwand und Profil (2010). Product Range | Hoesch Sections. On the
www. url http://www.spundwand.de/e/
Paikowsky, S. G. and R. V. Whitman (1990). The effects of plugging on pile per-formance and design. Canadian Geotech-nical Journal 27(4), 429–440.
Tomlinson, M. and J. Woodward (2008). Pile Design and Donstruction Practice (5 ed.). Taylor & Francis.
Iversen, K. M., Augustesen, A. H., & Niel-sen, B. N. (2010). Vertical Equilibrium of Sheet Pile Walls with Emphasis on Toe Ca-pacity and Plugging. Department of Civil Engineering, Aalborg University. DCE Technical reports No. 94.
M.Doubrovsky, V. Dubravina. (2021) Study of bearing capacity of tubular piles with di-aphragm under pressing loads. Proceedings of the Second International Conference on Press-in Engineering 2021, Kochi, Japan – Matsumoto et al (eds) © Taylor & Francis Group, London, 116-123.
Doubrovsky M., Kusik L., Dubravina V. (2021) Bearing Capacity of Tubular Piles: Technological Improvements and Model Testing. Advances in Geoengineering along the Belt and Road. BRWSG. Lecture Notes in Civil Engineering, vol 230. Spring-er. 137-154.
M. Doubrovsky, V. Dubravina, V. Shokarev et al. (2022) Ensuring the piles bearing ca-pacity under pressing loads. Proceedings of the 20th International Conference on Soil Mechanics and Geotechnical Engineering– Rahman and Jaksa (Eds) © Australian Ge-omechanics Society, Sydney, Australia, 3247-3252.
Borel, S., Bustamante, M., Rocher-Lacoste, F. (2006) The comparative bearing capacity of vibratory and impact driven piles. TRANSVIB 2006. Gonin, Holeyman et Rocher-Lacoste (ed.), Editions du LCPC, Paris, 118-127.
Bustamante, M., Gianeselli, L. (1991) Pre-dicting the bearing capacity of sheet piles under vertical load. Proceedings of the 4thInternational Conference on Piling and Deep Foundations -Stresa (Italy), 54-69.
Kwarciński, P. (2008). Nośność pionowa grodzic / Geoinżynieria: drogi, mosty, tunele . - Т.3, 38-40.
ArcelorMittal Piling Handbook 9th edition, 2022
European Committee for Standardization (2007). Eurocode 7: Geotechnical design - Part 1: General rules.
Heerema, E. P. (1979). Pile driving and stat-ic load tests on piles in stiff clay. Annual Offshore Technology Conference 2, 1135–1145.
Hoesch Spundwand und Profil (2010). Product Range | Hoesch Sections. On the
www. url http://www.spundwand.de/e/
Paikowsky, S. G. and R. V. Whitman (1990). The effects of plugging on pile per-formance and design. Canadian Geotech-nical Journal 27(4), 429–440.
Tomlinson, M. and J. Woodward (2008). Pile Design and Donstruction Practice (5 ed.). Taylor & Francis.
Iversen, K. M., Augustesen, A. H., & Niel-sen, B. N. (2010). Vertical Equilibrium of Sheet Pile Walls with Emphasis on Toe Ca-pacity and Plugging. Department of Civil Engineering, Aalborg University. DCE Technical reports No. 94.
M.Doubrovsky, V. Dubravina. (2021) Study of bearing capacity of tubular piles with dia-phragm under pressing loads. Proceedings of the Second International Conference on Press-in Engineering 2021, Kochi, Japan – Matsumoto et al (eds) © Taylor & Francis Group, London, 116-123.
Doubrovsky M., Kusik L., Dubravina V. (2021) Bearing Capacity of Tubular Piles: Technological Improvements and Model Testing. Advances in Geoengineering along the Belt and Road. BRWSG. Lecture Notes in Civil Engineering, vol 230. Springer. 137-154.
M. Doubrovsky, V. Dubravina, V. Shokarev et al. (2022) Ensuring the piles bearing ca-pacity under pressing loads. Proceedings of the 20th International Conference on Soil Mechanics and Geotechnical Engineering– Rahman and Jaksa (Eds) © Australian Geo-mechanics Society, Sydney, Australia, 3247-3252.