Projekt

Seismic investigations and monitoring of Vattenfall's experimental dam at Älvkarleby

Knowledge of dam integrity is vital for safe operation of hydropower installations. Geophysical methods provide the means for non-invasive and non-destructive investigations of dam sites and detection of anomalous conditions at an early stage.

Time lapse geophysics can be highly useful to detect anomalous conditions since measurements are repeated and differences in the response of the dam can be monitored. The overarching goal of this project is to determine if seismic methods can be used to detect flaws in earth embankment dams, based on investigations on an experimental dam with known flaws. These designed flaws can be regarded as defects that are potentially dangerous to a real dam.

The experimental dam is equipped with 120 permanently installed hydrophone pressure sensors that are connected to portable seismographs. Several campaigns are being performed through the project period in which pressure and shear wave sources are activated and the seismic response recorded through the hydrophones. The acquired data will be analyzed by seismic processing tools, with research into adopting processing algorithms to the conditions set forth by the design of earth embankment dams.

 

Articles and Conference Abstracts 

The potential of detecting flaws in an experimental dam at Älvkarleby, Sweden, using P-wave traveltime tomography.
Salas-Romero, S., Juhlin, C., Bernstone, C., 2020. EGU General Assembly Conference Abstracts.

Can Seismic Measurements Detect Flaws in the Core of an Embankment Dam? A Real-Scale Experiment in Älvkarleby, Sweden.
Salas-Romero, S., Juhlin, C., Bernstone, C., 2020. AGU Fall Meeting Conference Abstracts.

Om projektet

Tid

augusti 2019 - december 2020