Abstract:Because of the huge scale and complicated geometry condition,the stress redistribution and surrounding rock deformation of underground powerhouse of Jinping I hydropower station perform strong time-dependence. The factors influencing surrounding rock?s time-dependent behaviour are concluded as the excavation process and rheology of rock mass;and the latter is studied a lot. The rheological theory for rock mass is briefly introduced and discussed at the beginning. Then,taking a typical monitoring section as an example,the monitoring data of the section are analyzed. Based on the analysis,some suggestions about support are provided. The monitoring data also imply that damage area of the caverns contributes the primary time-dependent deformation. Finally,the time-dependent back analysis method based on displacement is studied. The concrete idea and ways of numerical implement of this method are discussed in detail. And the method is applied to the typical section to testify its rationality. The research results show that the time-dependent back analysis method is effective to simulate the time-dependent behaviours of surrounding rock.
孙 钧. 岩石流变力学及其工程应用研究的若干进展[J]. 岩石力学与工程学报,2007,26(6):1 081-1 106.(SUN Jun. Rock rheology mechanics and its advance in engineering applications[J]. Chinese Journal of Rock Mechanics and Engineering,2007,26(6):1 081- 1 106.(in Chinese))
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