Infiltrationsbedingte Prozesse in der Abdeckung von See- und Astuardeichen und deren Einfluss auf die Standsicherheit

authored by

Martin Achmus, Martin Pohl, Holger Schüttrumpf, Helmut Temmler

Abstract

This status report deals with the processes and effects of infiltration, as they occur in particular during wave overflow on the inner slope of a dike. Given the predicted sea-level rise, this scenario is crucial for dike safety, provided that the existing dikes are not strengthened. In this context, recent studies since the publication of the "Recommendations for the Execution of Coastal Protection Works" (EAK, 2002) are discussed. As a first basis for evaluation, the condition assessment of dikes using evaluation criteria is covered. In addition, the structure of the dike top soil is examined, whereby the water storage capacity and the shrinkage behaviour leading to crack formation are referred to. The cracks result in a high permeability of the dike cover of about 1-104 m/s. In the event of water infiltration, the dike cover softens, reducing shear strength and thus dike safety. High water levels in the dike core also have an unfavourable impact on stability, the effects and scale are illustrated by means of exemplary test results. Recommendations on calculation methods and measures to increase the dike safety are given as well as an outlook in respect of the coming climate change.

Organisation(s)

Institute of Geotechnical Engineering

External Organisation(s)

Federal Waterways Engineering and Research Institute (BAW)
RWTH Aachen University

Type

Article

Journal

Küste

Volume

2019

Pages

133-184

No. of pages

52

ISSN

0452-7739

Publication date

2019

Publication status

Published

ASJC Scopus subject areas

Oceanography, Ocean Engineering

Sustainable Development Goals

SDG 13 - Climate Action

Electronic version(s)

https://doi.org/10.18171/1.087113 (Access: Open)