WP 3: Hydrogeological modelling, drainage and grouting

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.