.... signal matching soil model final penetration upstream oil & gas initial soil model soil model vibratory signal matching soil model subsea system resistance hammer driven pile installation impact hammer penetration restrike signal matching soil model matching soil model vibratory hammer...

... for the NAM L13-F1-1 platform on the Dutch sector of the North Sea. frequency granular soil vibro driveability displacement vibratory hammer modeling & simulation dynamic driving force hammer frequency hook load driveability hammer vibratory upstream oil & gas offshore technology...

... soil degradation process in the first minutes after the start of extraction. The cyclic loading of the pile (and thus the soil) by the vibratory hammer causes soil fatigue, whereby the soil resistance will reduce to a limit value based on the soil type. To model the soil fatigue during extraction...

... are compared with the actual installation records. The paper will show that while the predictions are not perfect, they forecast the pile driving process realistically. To further enhance prediction capabilities, the paper will suggest that pile driving with vibratory hammers is monitored and that the recorded...

... of the foundation piles, and a shift from impact hammers to vibro hammers. As the use of vibratory hammers is becoming more and more common practice, the need for accurate vibro-driving simulation software has increased, which requires that the soil modelling is enhanced to address soil fatigue during pile driving...

...aTe 6842 Field Experience Installing A-Shape Piles With a Vibratory Hammer Aart Ligterink, IntI. Construction Equipment B.V., and Robert Martin, Stena Offshore Ltd. Copyright 1992, Offshore Technology Conference This paper was presented at the 24th Annual OTC in Houston, Texas, May 4-7, 1992...

...OTe 6236 Accurate Vertical Pile Installation by Using a Hydraulic Vibratory Hammer on the Arbroath Project A. Ligterink, International Construction Equipment BV; C. van Zandwijk, Heerema Engineering Service BV; and P. Middendorp, TNO·IBBC Copyright 1990, Offshore TechnoLogy Conference This paper...

... hammer equation displacement amplitude vibratory pile driver otc 6030 vibratory hammer upstream oil & gas resistance frequency application thixotropy operation vibration dynamic force vibratory pile offshore technology conference vibratory pile-driving equipment OTC 6030...

... ABSTRACT During the summer of 1987 ICE hydraulic vibratory hammers were used 3 times successfully for subsea installations of anchorpiles and template foundation piles. The hammers proved to be, for the soil conditions encountered, a suitable alternative to conventionally used impact hammers...

... ABSTRACT In recent years, there has been an increasing interest in the use of the vibratory hammer for pile driving and pile extraction. There has also been recent interest in utilizing vibratory hammers for offshore applications, especially in the installation of conductor piles. Because...

... ABSTRACT The capability of hydraulic vibratory pile driving hammers and other techniques using the principles of vibration have so far been underestimated by offshore foundation engineers. In many installation projects vibratory hammers should be considered as a real alternative, in other...