Using in situ density and strength measurements for sediment maintenance in ports and waterways

Purpose: Fluid mud layers can be substantial in waterways and they can jeopardise navigation when the ship’s keel comes in its vicinity. The nautical bottom has therefore to be properly characterised. Mud density and yield stress are used as criteria to characterise the nautical bottom. For a decade, measuring these parameters in situ has...

Water Injection Dredging and Fluid Mud Trapping Pilot in the Port of Rotterdam

As conventional dredging and relocation of sediment deposits is highly expensive, port authorities seek for more efficient solutions for reducing the costs of maintenance dredging. One of the well-known solutions is water injection dredging (WID). In general, WID is proven to be cheaper than the hopper dredging by leaving the sediment in place,...

Limit State Design of Shallow Foundations

The paper contains the analysis 86 field tests and calculations conducted by the authors for predicting the safe bearing capacity of shallow foundations. Limit state design of shallow foundation is studied. The allowable plastic shear zones were estimated by elasto-plastic FE analysis.