Monitoring the changing seismic site response of a fast-moving rockslide (Brienz/Brinzauls, Switzerland)
نویسندگان
چکیده
SUMMARY Seismic measurements on unstable rock slopes are a complementary tool to surface displacement surveys characterize and monitor landslides. A key parameter is seismic amplification, which tends scale with the degree of mass degradation. Amplification also provides direct measure how wavefield intensified during loading, eventually leading coseismic failure. Here we present dynamic response fast-moving Brienz/Brinzauls slope instability in Switzerland (10 $ \times 106 25 m3), threatens settlements infrastructure area. The rockslide shows strong amplification at two resonant frequencies factors up 11 polarization influenced by local fracture network orientation. We monitored over period 30 months using ambient vibrations regional earthquake recordings. observed change 50°, coinciding rotation relative vector field measured geodetic systems, highlighting linkage between stress (i.e. kinematics). For analysis secondary, displacements, propose singular value filtering remove principal component landslide motion. In addition, found increased values after periods precipitation, providing empirical evidence that precipitation history for assessing hazard earthquake-induced
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ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 2021
ISSN: ['1365-246X', '0956-540X']
DOI: https://doi.org/10.1093/gji/ggab473