Article
Re-assessing a soil nailing design in heavily weathered granite after a strong earthquake
Registro en:
Bulletin of Engineering Geology and the Environment 72
1435-9529
Autor
Villalobos, Felipe
Villalobos, Sergio
Oróstegui, Paulo
Resumen
Artículo de publicación ISI Soil nailing is increasingly adopted in potentially unstable slopes and steep excavations in Concepción, Chile. The paper presents a study of soil nailing design and construction in Maicillo, a heavily weathered granite. The
stability of the soil nailed wall was analysed using a limit equilibrium block method. The lowest factor of safety was
obtained when the nailed wall was 8 m high but without the bottom row of nails. This was followed by the global seismic case using an acceleration factor k h= 0.15. The occurrence of a strong earthquake (magnitude 8.8) 2 weeks after completion of the projected allowed a re-assessment of the soil nailing design. Despite registering a maximum acceleration of 0.63 g near the project site, the nailed wall did not present any damage, probably due to the use of undrained shear strength parameters