In this paper, the energy flux in a pile modelled as an elastic shell, is studied theoretically and experimentally. Based on analysis, new procedure proposed to quantify installation efficiency. This of importance for vibratory foundations offshore wind turbines it believed be first that relies directly propagating down rather than supplied by shaker. The approach tested piles installed two dis...

Article history: Received 11 November 2015 Received in revised form 2 December 2015 Accepted 3 December 2015 Available online xxxx Development of more accurate descriptions of dislocation motion requires understanding the actual effective stress driving it. Back stresses from dislocation pile-ups can work against the applied stress resulting in lower stresses acting on moving dislocations. This...

Underwater noise caused by impulse pile-driving during the installation of offshore foundations is potentially harmful to marine life, especially marine mammals. In Germany the regulation authority (BSH) set following limit values: (i) Sound Exposure Level (SEL) = 160 dB (re 1 μ Pa 2 s) and (ii) Peak Level (LPeak) = 190 dB (re 1 μ Pa) which must be complied with at a distance of 750 m to the co...

The objective of this work is to map, in a limited area inside and outside of the worksite, the environmental impact generated by sound pollution coming from the driving of foundation piles for high rise buildings, as well as to observe and check if the noise levels produced by the emitting source are tolerable in the urban environment. The methodology of the work includes a survey of technical...

A pile foundation is commonly adopted for transferring superstructure loads into the ground in weaker soil. They diminish settlement of infrastructure and augment soil-bearing capacity. This paper emphases pile-driving effect on an existing adjacent cylindrical semi-tapered pile. Driving a three-dimensional fruitfully accomplished by combining arbitrary Lagrangian–Eulerian (ALE) adaptive mesh e...

Pile-driving and other impulsive sound sources have the potential to injure or kill fishes. One mechanism that produces injuries is the rapid motion of the walls of the swim bladder as it repeatedly contacts nearby tissues. To further understand the involvement of the swim bladder in tissue damage, a specially designed wave tube was used to expose three species to pile-driving sounds. Species i...

Prestressed high-strength concrete (PHC) pipe pile has the advantages of high single bearing capacity, a wide range applications, good driving resistance, fast construction speed, etc. It been widely used in high-rise buildings, bridges, ports, and other industries. The application extra-long PHC piles with length more than 50 m is increasing. However, there are few studies on drivability hamme...

The demand for renewable energy has led to construction of offshore wind farms with high-power turbines, and many more wind farms are being planned for the shallow waters of the world’s marine habitats. The growth of offshore wind farms has raised concerns about their impact on the marine environment. Marine mammals use sound for foraging, orientation and communication and are therefore possibl...