Is under-base filling necessary?: Assessing behaviour of partially installed suction caisson

In the past decade, suction caissons have emerged as a preferred offshore foundation solution for wind turbines due to their silent installation process and potential for recyclability. However, there has been growing speculation regarding the necessity of under base filling, which involves filling the gap between the top plate of the suction...

Evaluation and development of CPT-based design methods for the laterally loaded pile in sand

In this thesis the performance of five CPT-based p-y models by Novello (1999), Dyson & Randolph (2001), Li, et al. (2014) and Suryasentana & Lehane (2014;2016) is assessed. This is done in part by comparing the measured load-deflection response from a set of lab- and field tests that is representative for offshore monopile structures to...

Optimizing The Installation of steel, Open-Ended Piles Through Impact Hammering For Offshore Applications: A Parametric, Experimental Study In The Geocentrifuge

As a result of population growth and economical prosperity, energy consumption has been on the rise for decades. Present-day projections predict the continuation of this trend with the rapid industrialization of former second world countries. Together with the rise of energy demand, incentives fo the scientific community to quantify the...

Centrifuge modelling of liquefaction flow slides

As soil behaviour is stress-dependent, a centrifuge model with tilting sample box was developed to generate liquefaction flow slides at higher confining stresses. The design and experimental set-up were based on the large liquefaction tank (de Jager et al., 2017). Fluidisation was used as sample preparation technique to produce a saturated,...

Dynamic Finite Element Analysis of Impact Pile Driving Centrifuge Tests

Many farms of wind turbines are being installed worldwide as a response to clean energy targets. These farms are usually installed in offshore environments since limitations of space can be encountered or due to public pressure against the visual disruption that farms can cause in urban areas. These offshore wind turbines are commonly founded on...

An investigation of the overlapping passive zones using a novel geotechnical centrifuge model

To improve the design of soil retaining walls in narrow trenches, a design optimization tool is introduced by Hosseinzadeh and Joosse (2015). This design optimisation tool is an intensification factor on the passive earth pressure coefficient Kp, that includes the effect of overlapping passive zones. The authors argue that the passive earth...

On the possibility of simulating pile set-up in sand by means of centrifuge model testing

An increase over time in bearing capacity of displacement piles is often found in the field. This phenomenon is called pile set-up. The increase is predominantly caused by an increase in shaft resistance and is observed even until 1000 days after installation. In the Dutch situation, a proposed tightening of the design standard for pile...