Optimisation of Predictions for Driven Piles Performance in Carbonate Silts for Offshore Structures in the Arabian Gulf

2022 ◽  
pp. 433-440
Author(s):  
Romain Clavaud ◽  
Zine Labidine Delimi ◽  
Luke Martin ◽  
Muhammad Bilal Mumtaz
Keyword(s):  
Arabian Gulf ◽  
Offshore Structures ◽  
Driven Piles

scholarly journals Simulation of the Plug inside Open Steel Pipe Piles with Regards to Different Installation Methods

2016 ◽  
Author(s):  
Johannes Labenski ◽  
Christian Moormann ◽  
Johannes Aschrafi ◽  
Britta Bienen
Keyword(s):  
Field Tests ◽  
Cohesive Soil ◽  
Offshore Structures ◽  
Steel Pipe ◽  
Soil Conditions ◽  
Small Scale ◽  
Driven Piles ◽  
Pile Installation ◽  
Pile Diameter ◽  
Port Structures

Open steel pipe piles are used for various applications in costal engineering and port structures and they are becoming increasingly more important for offshore structures. A plug formed during the installation of open steel pipe piles has an influence on the installation process of the steel pipe pile as well as on the final bearing behaviour and the pile resistance. Forming of the plug depends on different influences, e.g. the pile diameter, the soil conditions and the installation method. To obtain a better understanding of the formation of the plug and its consequences several experimental small-scale tests, experimental field tests and numerical simulations have been performed. But so far this phenomenon is not completely investigated yet. At the beginning of this paper a structured overview about the characterization of the plug as well as soil mechanical processes during the pile installation in non-cohesive soil are provided. Then, the results of a centrifuge study are shown. The focus of this paper is the numerical simulation of the installation process of impact and vibratory driven piles in non-cohesive soil to investigate the effect of plugging with regard to different installation methods. Centrifuge experimental results are utilized to validate the numerical model, which can provide detailed insights into the physical processes occurring in the soil but are difficult to measure in experiments. The numerical analyses hence illustrate zones of densification/loosening, which highlight the differences resulting from the installation methods.

Development of Piled Foundation Bias Factors in the Arabian Gulf

2005 ◽  
Author(s):  
Hassan Zaghloul ◽  
Beverley Ronalds ◽  
Geoff Cole
Keyword(s):  
Soil Mechanics ◽  
Research Work ◽  
Arabian Gulf ◽  
Back Analysis ◽  
Driven Piles ◽  
Deterministic Method ◽  
Geographical Regions ◽  
Industry Practice ◽  
Engineering Parameters ◽  
Over 40 Years

Offshore sites in the Arabian Gulf are characterized by the presence of calcareous sediments. Research work on driven piles in calcareous sediments has been developing for over 40 years. Yet, international codes and standards do not provide, exploit or quantify guidance for driven piles in carbonated sediments. Lack of design methods is partly attributed to inability of conventional soil mechanics to predict appropriate engineering parameters in calcareous sediments. Further, the characteristics of the sediments vary between the geographical regions depending on the geological history forming that region. As a result, current industry practice follows a conservative and subjective approach at the mere mention of carbonated sediments. Consequently, reassessment of an existing platform may falsely indicate the need for expensive construction intervention. In this study, we reviewed current practice for assessment of piled foundation in the calcareous sediments of the Arabian Gulf, collated a database of actual pile driving records, developed and implemented a detailed back-analysis procedure and implemented to derive actual pile capacities. The statistics show that the use of a single capacity value, as implied by the deterministic method of codes and standards, is insufficient to describe the various conditions surrounding the as-installed driven piles in calcareous sediments.

Cone penetration test (CPT) methods for end-bearing assessment of open- and closed-ended driven piles in siliceous sand

2008 ◽  
Vol 45 (8) ◽  
pp. 1130-1141 ◽  
Author(s):  
Xiangtao Xu ◽  
James A. Schneider ◽  
Barry M. Lehane
Keyword(s):  
Small Diameter ◽  
Predictive Performance ◽  
Cone Penetration Test ◽  
Offshore Structures ◽  
Penetration Test ◽  
Driven Piles ◽  
Cone Penetration ◽  
Pile Installation ◽  
Diameter Pipe ◽  
Load Tests

The cone penetration test (CPT) has been used as a means of assessing the end bearing of driven piles in sand for many decades. This paper examines the predictive performance of four new such CPT-based methods recently included in the commentary of the 22nd edition of the American Petroleum Institute’s recommended practice for fixed offshore structures. It is demonstrated that the formulations given by one of these methods, referred to as UWA-05, provides better predictions than the three other CPT methods when tested against (i) an existing database of base-capacity measurements, (ii) results from a new series of load tests on small-diameter piles, and (iii) base capacities measured in two recently conducted load tests on 1.5 m diameter pipe piles. It is shown that the UWA-05 has better predictive performance (and hence reliability) as it accounts explicitly for the effects of partial plugging during pipe–pile installation and for variations in CPT resistance in the vicinity of the pile tip.

THE STOCK ASSESSMENT OF OTOLITHES RUBER IN NORTH-WEST ARABIAN GULF

2010 ◽  
Vol 23 (0) ◽  
pp. 1-14
Author(s):  
Amina A. Hashim ◽  
A.R.M.Mohamed ◽  
Amjad K. Resen
Keyword(s):  
Stock Assessment ◽  
Arabian Gulf ◽  
North West ◽  
Otolithes Ruber

The taxonomy of sin croaker Johnieops sina (Cuvier) in Iraqi marine waters, North-West Arabian Gulf

2013 ◽  
Vol 26 (2 (special Issue)) ◽  
pp. 55-71
Author(s):  
A. R. M. Mohamed ◽  
A. K. T. Yesser ◽  
A. H. J. Abdullah
Keyword(s):  
Arabian Gulf ◽  
Marine Waters ◽  
North West

A method of technical diagnostics for offshore structures

1994 ◽  
Vol 16 (2) ◽  
pp. 43-48
Author(s):  
Do Son
Keyword(s):  
Diagnostic Method ◽  
Joint Venture ◽  
Oil And Gas ◽  
Residual Life ◽  
Life Time ◽  
Offshore Structures ◽  
Technical Diagnostics ◽  
Offshore Platforms ◽  
South Vietnam ◽  
Local Destruction

This paper describes the results of measurements and analysis of the parameters, characterizing technical state of offshore platforms in Vietnam Sea. Based on decreasing in time material characteristics because of corrosion and local destruction assessment on residual life time of platforms is given and variants for its repair are recommended. The results allowed to confirm advantage of proposed technical diagnostic method in comparison with others and have been used for oil and gas platform of Joint Venture "Vietsovpetro" in South Vietnam.

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