Article
Engineering, Geological
Craig Davidson, Michael John Brown, Benjamin Cerfontaine, Therar Al-Baghdadi, Jonathan Knappett, Andrew Brennan, Charles Augarde, William Coombs, Lei Wang, Anthony Blake, David Richards, Jonathan David Ball
Summary: This study examines the feasibility of using screw piles as a foundation solution for offshore jacket-supported wind turbines in deeper water. The centrifuge testing of different model screw piles shows that existing design methods underestimate the axial capacity of these large-scale screw piles. Revised analytical methods are proposed based on the test results.
Article
Engineering, Geological
Hongjiang Li, Songyu Liu, Liyuan Tong, Dingwen Zhang
Summary: The reuse of existing piles is an important approach to achieve low-carbon, resilient and sustainable urban construction. This study investigates the influence of adjusting the head fixity of existing piles on the lateral load response of new piles, and provides a feasible method to enhance the contributions of existing piles to the lateral load responses of new piles.
Article
Engineering, Geological
K. Rainer Massarsch, Carl Wersall, Bengt H. Fellenius
Summary: This article discusses the installation of piles using vibratory methods and provides case studies as illustrations. The influence of vibration frequency on pile penetration, bearing capacity, and vibration emission is examined. The driving process has a stronger impact on the performance of vibratory-driven piles compared to impact-driven piles. Concepts for assessing driveability are presented, and the significance of system resonance in the vibrator-pile-soil system is explained with regards to driveability and pile bearing capacity.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2022)
Article
Engineering, Geological
Leonardo Maria Lalicata, Sarah Elizabeth Stallebrass, Andrew McNamara, Jignasha Prakash Panchal
Summary: Urban development in congested cities requires taller structures, which in turn increases the size of pile foundations and the carbon footprint. Improving pile performance by enhancing shaft capacity can increase the ultimate capacity of the pile, especially in clay soils. Profiling the side walls of bored cast in situ piles with 'impressions' has shown to increase shaft capacity by around 40%, according to tests and field trials in London.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2022)
Article
Engineering, Geological
Hongjiang Li, Shuji Tamura
Summary: This paper presents a comparative study on the behavior of partially head-restrained piles and compares the lateral performance of new piles affected by pile-head restraints with that of single piles in virgin sites. The paper discusses the intrinsic correlation between the lateral pile capacity and the factor linking partially head-restrained piles to pure free- and fixed-head piles, and also derives analytical models for the correlation between pile-head restraint percentage and pile capacity. The proposed method is validated using numerical and literature examples, highlighting its advantages in determining the lateral pile capacity considering head restraints.
Article
Engineering, Geological
Yin Hoe Ong, Cheng Teik Toh, Sai Kim Chee, Hisham Mohamad
Summary: Analysis of load tests on 100 instrumented bored piles in different weathering grades of different tropical geological formations in peninsular Malaysia showed correlations between ultimate shaft and base resistance with standard penetration test (SPT) results and unconfined compression strengths. The developed models for shaft and base resistance can be used for strain softening, strain hardening, and stiffening behavior, providing accurate predictions for pile performance.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2021)
Article
Engineering, Geological
Ken Vinck, Tingfa Liu, Jonathan Mawet, Stavroula Kontoe, Richard J. Jardine
Summary: This paper describes recent instrumented driving, monotonic testing to failure, and restrike tests conducted on large open steel piles driven at a site in North-western France. The experiments provide important new conclusions regarding driving behavior, installation set-up, and resistances available under compression and tension loading. The field tests contribute to building a high-quality dataset that allows proposed axial capacity design methods to be tested and potentially refined to provide reliable and representative design tools.
CANADIAN GEOTECHNICAL JOURNAL
(2023)
Article
Engineering, Geological
San-Shyan Lin, Wei-Ning Chen, Salisa Chaiyaput, Chia-Hung Lai
Summary: Compression tests were carried out on piles socketed in gravelly sediments. Back-analysis was used to determine model parameters by calibrating the design value of beta and comparing the results with measured data. It was found that the back-calculated beta value was generally larger than that obtained by current methods, indicating the sensitivity of back-analysis results to measured data.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2021)
Article
Engineering, Geological
Mingge Ye, Jinmei Dong, Mi Zhou, Xiaowen Zhou, Xiaochun Lu
Summary: This paper describes an extensive investigation into the responses of a fresh concrete pipe pile induced by the adjacent penetration of a pipe pile casing into clay through large-deformation finite-element analysis. The numerical model was validated using field monitoring and centrifuge test data, and a formula for estimating the maximum lateral deformation of a fresh concrete pile was developed to guide practical pipe pile design.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2021)
Article
Engineering, Geological
Rajni Saggu
Summary: The effects of increased temperature on the stress-strain response of geothermal piles and supporting soil were studied using numerical simulations. The study found that the additional stresses and strains in the piles and soil depend on factors such as pile base restraint, sand relative density, pile length, pile diameter, and coefficient of lateral earth pressure. Cyclic thermal loading resulted in increased axial stresses in the piles.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2022)
Article
Engineering, Geological
Marianna Adinolfi, Guido Rianna, Paola Mercogliano, Rosa Maria Stefania Maiorano, Stefano Aversa
Summary: This study investigates the impact of climate change on energy piles and indoor comfort, predicting an increase in air and ground temperatures in Naples in the future, leading to a decreased need for heating but increased need for cooling in buildings. The changes in energy pile behavior due to climate change are mainly determined by the initial temperature of the ground.
ENVIRONMENTAL GEOTECHNICS
(2021)
Article
Engineering, Geological
L. Doan, B. M. Lehane
Summary: This paper presents observations from a newly compiled database of static load tests on different types of piles in various geological conditions and suggests that the updated LCPC method in 2012 performs the best among existing CPT-based methods. It also proposes a new CPT approach that may lead to more reliable estimates of pile capacity.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2021)
Article
Engineering, Geological
Ian W. Johnston
Summary: This paper examines the predictive ability of three methods for the load-settlement response of rock-socketed piles. By comparing the predictions for side-resistance-only piles with full-scale tests, it is revealed that one method produces reasonable predictions while the other method underpredicts performance.
CANADIAN GEOTECHNICAL JOURNAL
(2022)
Article
Engineering, Geological
Hong-Xing Li, Shi-Jin Feng, Shao-Hua He, Xiao-Lei Zhang, Da-Ming Sun
Summary: This study proposes a new type of heliostat support structure (HSS) and conducts full-scale field load testing to investigate its performance under severe wind loading. The results show that the proposed HSS performs well and provides sufficient rigidity to limit structural deformations within tolerable values. Three-dimensional modeling is used to further investigate the performance of the HSS and facilitate the development of improved prediction methods for its load responses.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2022)
Article
Engineering, Civil
Shreya Thusoo, Taku Obara, Susumu Kono, Kiyoshi Miyahara
Summary: The use of steel-encased precast concrete (SC) piles has increased rapidly in Japan and Southeast Asia for earthquake-resilient foundation systems. However, there are currently no official guidelines for the design of SC piles in severe earthquakes. This study established a database of 79 tests on SC piles to verify design provisions and developed a nonlinear static model considering concrete confinement and steel casing local buckling for predicting moment and drift capacities.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Multidisciplinary
Ahmad Safuan A. Rashid, Jonathan A. Black, Ahmad Beng Hong Kueh, Norhazilan Md Noor
Article
Computer Science, Interdisciplinary Applications
Sam Stanier, Jelke Dijkstra, Danuta Lesniewska, James Hambleton, David White, David Muir Wood
COMPUTERS AND GEOTECHNICS
(2016)
Article
Computer Science, Interdisciplinary Applications
Danny Smyl, Tyler N. Tallman, Jonathan A. Black, Andreas Hauptmann, Dong Liu
Summary: Modeling errors are present in all discretized numerical models, especially amplified when reduced-order models are used. Accurately approximating these errors improves model confidence statistics and quantitative results in prediction, tomography, and signal processing frameworks using numerical models. A neural network approach has been proposed to effectively approximate and compensate for highly nonlinear and non-Gaussian modeling errors in augmented direct and inverse problems, demonstrated using simulated and experimental data from various physical systems.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Engineering, Geological
Vinayagamoorthy Sivakumar, Pratiksha Pandey, Snehasis Tripathy, Jonathan Black, Paul Dunlop, Kyle McKee
Summary: This study introduces a ground improvement technique using dry air, which is simple and does not require complex construction procedures. Experimental results show a significant improvement in soil strength, indicating the possibility of full-scale implementation. However, variabilities in ground conditions may pose additional challenges.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2022)
Article
Engineering, Geological
J. Fanning, V. Sivakumar, S. Nanda, K. Gavin, T. Murray, A. Bradshaw, J. Black, S. Jalilvand
Summary: One way to install plate anchors in deep seabed is by dropping the anchor system from sea level and allowing it to embed in the seabed under its own weight. The anchor can rotate and embed further into the seabed when dragged. Difficulties may arise in achieving a horizontal anchor plate and perpendicular mooring line, which would maximize pullout capacity. Centrifuge testing was conducted to examine various aspects of the anchor plate performance, including plate orientation and pullout angles. The performance of biwing anchors with different plate spacing was also examined and compared with predictions obtained through finite-element modeling (FEM).
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2023)
Proceedings Paper
Engineering, Civil
Koji Nakashima, Jonathan A. Black, Irfan Ullah Khan, Steven Bayton
GEOTECHNICS FOR SUSTAINABLE INFRASTRUCTURE DEVELOPMENT
(2020)
Article
Engineering, Environmental
Mercedes Regadio, Jonathan A. Black, Steven F. Thornton
Proceedings Paper
Engineering, Geological
I. U. Khan, M. Al-Fergani, J. A. Black
PHYSICAL MODELLING IN GEOTECHNICS, VOL 1
(2018)
Proceedings Paper
Engineering, Geological
R. T. Klinkvort, J. A. Black, S. M. Bayton, S. K. Haigh, G. S. P. Madabhushi, M. Blanc, L. Thorel, V. Zania, B. Bienen, C. Gaudin
PHYSICAL MODELLING IN GEOTECHNICS, VOL 1
(2018)
Proceedings Paper
Engineering, Geological
A. F. Tessari, J. A. Black
PHYSICAL MODELLING IN GEOTECHNICS, VOL 1
(2018)
Proceedings Paper
Engineering, Geological
S. M. Bayton, T. Elmrom, J. A. Black
PHYSICAL MODELLING IN GEOTECHNICS, VOL 1
(2018)
Proceedings Paper
Engineering, Geological
S. M. Bayton, J. A. Black, T. Klinkvort
PHYSICAL MODELLING IN GEOTECHNICS, VOL 1
(2018)
Proceedings Paper
Engineering, Geological
J. A. Black, S. M. Bayton, A. Cargill, A. Tatari
PHYSICAL MODELLING IN GEOTECHNICS, VOL 1
(2018)
Proceedings Paper
Engineering, Geological
J. A. Charles, C. C. Smith, J. A. Black
PHYSICAL MODELLING IN GEOTECHNICS, VOL 2
(2018)
Article
Engineering, Geological
Ahmad Safuan A. Rashid, Jonathan A. Black, Ahmad Beng Hong Kueh, Hisham Mohamad, Norhazilan Md Noor
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GROUND IMPROVEMENT
(2017)