Re-assessing a soil nailing design in heavily weathered granite after a strong earthquake
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- 作者：Sergio A. Villalobos (1)
Paulo L. Oróstegui (2)
Felipe A. Villalobos (3) - 关键词：Nailed wall ; Heavily weathered granite (Maicillo) ; Limit equilibrium method ; Stability analysis ; Strong subduction earthquake ; Paroi clouée ; Granite fortement altéré (Maicillo) ; Méthode des équilibres limites ; Analyse de stabilité ; Fort séisme de subduction
- 刊名：Bulletin of Engineering Geology and the Environment
- 出版年：2013
- 出版时间：June 2013
- 年：2013
- 卷：72
- 期：2
- 页码：203-212
- 全文大小：1018KB
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Paulo L. Oróstegui (2)
Felipe A. Villalobos (3)
1. Geology and Geomechanics, New Mine Level Project, CODELCO, Coya Camp 267, Machalí, Rancagua, Chile
2. OITEC Engineering, Surveying and Geotechnics, Lincoyan 444, Of. 309, Concepción, Chile
3. Department of Civil Engineering, Catholic University of Concepción, Alonso de Ribera 2850, Concepción, Chile - ISSN：1435-9537
文摘
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.