WP 3: Hydrogeological modelling, drainage and grouting

Develop methodology and guidelines for calculating drainage towards excavations and the risk for settlements

Work tasks WP 3:

State-of-the-art (SOA) review of mitigation measures for groundwater problems, including grouting, freezing and infiltration.
New analysis method(s) and guidelines for assessing the vulnerability to drainage caused by excavation, for different ground conditions and different foundation types.
Necessary pre-investigations in bedrock for excavation pits (with, for instance, optical televiewer).
Pumping test(s) (in situ) for 1 or 2 deep excavations to evaluate the hydrogeological parameters and supporting
wall water tightness; assessment of whether or not the test can become standard practice for deep excavations.
Numerical modelling of drainage effects for two case studies, including sensitivity analyses, to evaluate uncertainties, limitations and reliability of models.
New guidelines for grouting procedures under low overburden pressures.