Working Performance Control Technology of Underwater Grouting Pile Concrete

Investigation of the Performance of a Method to Reduce Pile Driving Generated Underwater Noise

Robustness of autonomous underwater vehicle control in variable working conditions

vehicles. Sliding mode control was one of the fi rst control methods implemented for underwater vehicles. It has shown advantages in several implementations. Different control methodologies used for underwater vehicles are categorized by Fossen. In the work of Logan, H/msynthesis methods are compared with the sliding mode method. A comparison of different control techniques, including artifi ci...

Validation of dBSea, Underwater Noise Prediction Software. Pile Driving Focus

This report aims to characterise the prediction error of the different noise modelling algorithms used by the underwater noise prediction software “dBSea”. Two shallow water pile driving scenarios are presented, and the software’s prediction is matched against the measured real world data. The results of the comparison show that while you can get good results with a simple model based on spheri...

Measurement and Modelling of Underwater Noise from Pile Driving

Many coastal and offshore construction activities require the driving of piles into the seabed, either using impact or vibratory pile drivers. Impact pile driving produces an intense impulsive underwater noise that has been associated with fish deaths at very short range, whereas vibratory pile driving produces a lower level continuous noise. Because of the high sound levels involved, noise fro...

Enhanced Performance of Recycled Aggregate Concrete with Atomic Polymer Technology

The atomic polymer technology in form of mesoporous inorganic polymer (MIP) can effectively improve material durability and performance of concrete by dramatically increase inter/intragranular bond strength of concrete at nano-scale. The strategy of MIP is fundamentally different from most additives currently on the market for industrial applications. When MIP is added to a concrete or masonry ...