Vibratory installation of piles and casings can be extremely economical and therefore the contractors’ preferred method of pile driving. Compared to impact pile driving it also has the advantage of reduced noise pollution. Unfortunately, this installation method is still fraught with uncertainties. The foremost question is driveability and equally important is the question of bearing capacity o...

Because offshore wind turbines are high-rise structures, they transfer large horizontal loads and moments to their foundations. One of the keys to designing a foundation is determining the sensitivities and laws affecting its load-bearing capacity. In this study, this procedure was carried out for a new high-rise cap pile group foundation adapted to the loading characteristics of offshore wind ...

Original scientific paper In this paper, based on the overlapping deformation mode of load transfer law of uplift belled pile, and the theory of elastic mechanics, the elastic-plastic analytical solutions of uplift belled pile were derived, and the nonlinear elastic-plastic deformation analysis method was established, which made the deformation analysis theory of uplift belled pile more reasona...

An open ended pipe pile can become plugged when sufficient frictional resistance is developed by the inner soil cylinder within the pile (soil plug), thereby preventing further intrusion of the soil into the pile. When plugging occurs in an impact driven pipe pile, a complex interaction between the pile and soil plug takes place, causing the propagating stress wave to undergo an abrupt change. ...

In this study, the behavior of screw piles models with continuous helix was studied by conducting laboratory experimental tests on a single pile that has several aspect ratios (L/D) under influence static axial compression loads. The were inserted in soft soil unit weight 18.72 kN/m3 and moisture content 30.19%. Also, liquid limit 55% plasticity index 32%. A physical model designed to investiga...

Screw piles have been used to support a variety of structures due their ease installation and high axial capacity. Recently, screw proposed as an alternative foundation solution for offshore renewable quiet or silent installation. Due variable geometry, design prediction requirements its effect on in-service capacity may be challenging. In this research study, the discrete-element method (DEM) ...

The purpose of this study is to investigate bending moment and the axial load capacity of a pressurized pipe suffering from a through-wall circumferential crack repaired by a composite sleeve. The three-dimensional finite element method (FEM) was adopted to compute the results, and the failure assessment diagram (FAD) was employed to investigate the failure behavior of the repaired pipe. The fi...

Rig was erected on a foundation that must be able to support the forces caused by rig. The purpose of this research is find out how big difference between axial and lateral bearing capacity RIG ARJUNA #28 foundation. conducted at Arjuna in Prabumulih City. In research, an analysis carrying pile carried using Sondir N-SPT data which will then compared with results these calculations. It can conc...

A new stiffened composite pipe pile was developed for improving the foundation of reclaimed ground in ocean engineering. To study bearing capacity group, a combination field test and finite element method used. Firstly, tests were performed on proposed single pile. The model verified by comparing numerical simulation results with results. load transfer mechanism from core to cemented soil surro...