PURPOSE: An analytical model to predict the response of mounds placed in the offshore is presented, with the overall aim of providing a technique for the preliminary design of mounds subjected mainly to cross-shore sediment-transport processes induced by non-breaking waves. For example, offshore mounds created from dredged material can be used to protect sandy beaches by dissipating wave energy...

Offshore aquaculture is increasingly viewed as a mechanism to meet growing protein demand for seafood, while minimizing adverse consequences on the environment and other uses in the oceans. However, despite growing interest in offshore aquaculture, there appears to be no consensus as to what measures commonly define an offshore site or how effects of offshore aquaculture—relative to more nearsh...

The performance of monopiles in cohesive soils is great interest for future offshore wind farm developments, particularly under the cyclic loads experienced ocean environment. Clay behaviour during undrained loading complex and involves accumulation plastic strains, generation excess pore-water pressures degradation initial stiffness. In this paper, a laterally-loaded monopile spatially variabl...

   Drilling fluids are an essential component of the rotary drilling process used to drill for oil and gas on land and offshore environments. The injection of this nano particle into drilling fluid increases the viscosity levels fluids. In these experiments, the rheological properties of the fluid including apparent viscosity (AV), plastic viscosity (PV), yielding point (YP), mud c...

Nowadays, the numerical analysis of submarine pipelines offshore oil and gas industry is a big challenge in engineering design. A simple, fast accurate tool proposed this article based on macroelement concept. The novel within framework hypoplasticity can consider static monotonic combined (multi-directional) loads for shallow embedded clay. incremental nonlinear constitutive formulas are defin...

Abstract A high-cycle accumulation (HCA) model predicting the of permanent strain or excess pore water pressure in clay under a large number load cycles is presented. Data from an extensive laboratory testing program on kaolin undrained cyclic loading has been analysed for that purpose. The influence amplitude, void ratio, stress overconsolidation ratio and frequency rates considered constituti...

We analyzed a varved sequence of sediment from a 350-m depth in the north basin of Lake Malawi, East Africa, for the size distribution of the sortable silt fraction (10–64 mm). Mean size of the sortable silt (SS) varies measurably in sediments spanning the past 650 yr and covaries with the mass accumulation rate of terrigenous silt and clay (TMAR) over much of the interval. Most of the silt and...