Offshore wind-turbine support structures are largely made of steel since monopiles have accounted for the majority installations in last decade. As turbines become bigger, led to an exponential increase material and installation costs. From this point view, use concrete future has been initiated. In study, concrete–steel composite piles investigated. A pre-tensioned high strength pile was place...

In order to examine the optimal design and operating parameters, kinetics for microbiological reaction and oxygen consumption in composting of waste activated sludge were quantitatively examined. A series of experiments was conducted to discuss the optimal operating parameters for aerobic composting of waste activated sludge obtained from Kawagoe City Wastewater Treatment Plant (Saitama, Japan)...

Cone penetration test is one of the most common in-situ tests for pile analysis given that by its analogy as a model pile, the measured cone resistance and sleeve friction can be employed for estimation of pile unit toe and shaft resistances, respectively. In this paper, group method of data handling (GMDH)-type neural networks optimized using Genetic algorithms (GAs) are used for modelling the...

The impact characteristics of a single pile are the theoretical basis high-strain detection technology piles and driving. Firstly, series model experiments conducted to study penetration, axial force friction under loads different rammer falling distances. Then, dynamic load condition pile-soil slippage was established by using elastodynamic method, analytical solution obtained. results show th...

The compressive behavior of tapered piles, particularly those with circular cross-sections, has been investigated during the last few decades. However, tensile such piles rarely studied in literature. In this paper, 12 static axial tests, comprising six and were performed on instrumented uniform cross-sections using a geotechnical centrifuge. Three had correspondingly circular, square, X-shaped...

It is seen from recent earthquakes that in case of fixed-base foundation system, damped systems have proved to be longing the lifespan structure by lengthening lateral fundamental period leads higher damping comparison assumptions a system. In this study, better understand phenomenon involved soil-pile interaction finite element simulation model developed Abaqus FEA software. The numerical made...

Piles used in bridges, structures and marine environments are typically produced using concrete, steel, and timber. High repair and replacement costs of these piles have led North American highway agencies and port authorities to investigate the feasibility of using durable materials such as fiber-reinforced polymers (FRP) in pile applications. This paper presents a new generation of composite ...

In this paper, a numerical investigation of the effects grout parameters on load response concrete pile-grout systems in soft clay is presented. The study examines influence diameter and depth bearing capacity pile under vertical lateral loads. research findings indicate that grouting can enhance single system by up to 27% loads 51% loads, depending used. This due grout's ability fill voids soi...