Citation

Liang G. Disaster Adv. 2012; 5(4): 312-320.

Copyright

(Copyright © 2012, Shankar Gargh)

DOI

unavailable

PMID

unavailable

Abstract

The study takes the high rock slope of Jinping-I stage hydropower station as an example to analyze the stability of high rock slope based on safety monitoring data. Through a comprehensive analysis of field data measured by multi-point extensometers, rock bolt dynamometer, graphite bar-type convergence gauge, shearing-resistance tunnel and electronic total station, the deformation character and deformation law are studied. The results are summarized as follows: (1) Due to deep fissure development, large unloading depth, extensive excavation, the slope shows large excavation deformation, in situ monitoring should be strengthened and timely supporting measures should be adopted to prevent landslide. (2) Unloading rebound and tensile crack are caused by slope excavation. The deformation near to the structural planes such as F42-9, F5 and F8 is large because of poor rock quality confirmed by the monitoring result of multi-point extensometers, bolt dynamometers, joint meters across through structural planes. (3) The disturbance of construction on rock, especially near to monitoring instruments, should be further reduced in order to ensure the normal operation of monitoring equipments and the reliability of monitoring data. The displacement back -analysis and the visualized data-mining system are studied and applied to the high rock slope engineering of Jinping hydropower station.