Optimisation of lubrication in pipe-jacking

PhD student:    Kevin O'Dwyer        Start and finish dates:    09/17 - 08/21

Funding:  Irish Research Council – Enterprise Partnership Scheme (with Ward and Burke Construction as partner) - €96,000

Collaborators:   Dr. Brian Sheil (Oxford University)

Summary:    This research will involve (i) the interrogation of data from a number of pipe-jacking drives conducted by Ward and Burke Construction in Ireland and the UK and (ii) the instrumentation of a number of jacking pipes to help understand and optimise the delivery of lubricant to reduce pipe-soil friction.

Use of the soil water characteristic curve to determine solute travel times in sensitive catchments.

PhD student:    Thomas Forkan          Start and finish dates:    09/15 - 08/19 (expected)

Funding:    NUI Galway (College of Engineering and Informatics Scholarship) - €60,000

Collaborators:   Dr. Mark Healy (GENE), Dr. Owen Fenton (Teagasc)

Summary:    Centrifuges are used increasingly nowadays for the development of Soil Water Characteristic Curves (SWCC), relevant to soil drainage problems. However, the time for which each suction level should be applied has not been considered systematically in previous studies. This research is considering the effect of pressure-step durations on the SWCC for different soil textures and densities, and applying these findings to problems involving nitrogen and phosphorus movement through soils.

Mechanical and leaching properties of stabilised contaminated sediment

PhD student:    Wanlu Zhang          Start and finish dates:    09/15 - 08/16 (Hohai University, China); 09/16 - 08/18 (NUI Galway); 09/18 - 08/19 (Hohai University)

Funding:    Chinese Scholarship Council - €28,800; Environmental Protection Agency (Small Scale Study) - €7,808

Collaborators:   Dr. Liam Morrison (Earth and Ocean Sciences, NUI Galway); Prof. Yonghui Chen (Hohai University); Peter Seymour (ECOCEM)

Summary:    In this research, the relative merits of various binders are examined for stabilising sediment dredged from two Irish ports. The goal of the stabilisation is to increase strength/stiffness and reduce leachability of contaminants. Tank leaching tests are used for the leachability study. 

Modelling monopiles subject to wind, wave and tidal loading

MEngSc student:    Hewa Orang          Start and finish dates:    01/16 - 01/19 (part-time)

Collaborators:   Dr. Stephen Nash

Summary:    This project involves 3D numerical modelling (using ABAQUS) of the natural frequencies of monopiles with wind, wave and tidal loading, subject to scour. 

A study of buried limestone valleys between Lough Corrib and Galway City

MAppSc student:    Megan Dolan        Start and finish dates:    01/18 - 12/19 

Funding:  Science Foundation Ireland (iCRAG Research Centre) - €51,883

Collaborators:   Dr. Tiernan Henry, Dr. John Murray, Dr. Eve Daly (Earth and Ocean Sciences)

Summary:    During the ground investigation for the engineering design of the N6 Galway City Transport Project, deep buried limestone valleys were discovered in the region between Lough Corrib and Galway City. With this extensive ground investigation as background and with access to two local quarries, the project aims to: (1) map and characterise the Visean limestones in the area, (2) perform additional geophysics to enable 3-D models of some of the buried valleys to be developed, and (3) carry out appropriate sampling and laboratory testing to understand the origin and nature of the infill material and its implication for geotechnics and hydrology/hydrogeology in the area.