STRUCTURAL ENGINEERING / EARTHQUAKE ENGINEERING
Online ISSN : 1882-3424
Print ISSN : 0289-8063
Paper
OBSERVED STABILITY OF NATURAL AND REINFORCED SLOPES DURING THE 2008 WENCHUAN EARTHQUAKE
Deping GUOMasanori HAMADA
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JOURNALS FREE ACCESS

2012 Volume 29 Issue 2 Pages 9s-22s

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Abstract

The 2008 Wenchuan earthquake with a surface wave magnitude of 8.0 induced numerous landslides along the Longmen Mt. zone in Sichuan Province of China. The authors investigated into various influential factors on the slope stability of 119 landslides in Wenchuan prefecture, such as horizontal peak ground acceleration, slope angle, slope height, rock materials and geological structures. The authors developed hanging wall and footwall's acceleration attenuation formulae from 115 seismic stations and the formulae confirmed hanging-foot wall effect had notable influence on landslide distribution density and occurrence probability. The results of multivariable analysis clarified that slope height, horizontal peak ground acceleration and geological structures were more influential to sliding area and volume than slope angle and rock materials. Furthermore, the authors discussed the effectiveness of reinforcements on the slope stability and showed that anchor cable, frame beam and soil nailing wall had good anti-seismic property, however, shotcrete with bolts had limited ability to enhance slope stability during the earthquake.

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© 2012 by Japan Society of Civil Engineers
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