Determining the Comprehensive Deformation Modulus of Foundation after High Dam Constructed

LI Pan-feng; CUI Chang-wu; CHEN Kui; ZhANG Shao-cheng

doi:10.3969/j.issn.1001-5485.2014.11.0042014,31(11):17-21

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Journal of Changjiang River Scientific Research Institute ›› 2014, Vol. 31 ›› Issue (11) : 17-21. DOI: 10.3969/j.issn.1001-5485.2014.11.0042014,31(11):17-21

CHARACTERISTICS AND TESTS OF ROCK MECHANICS

Determining the Comprehensive Deformation Modulus of Foundation after High Dam Constructed

LI Pan-feng^1,2, CUI Chang-wu^1,2, CHEN Kui^1,2, ZhANG Shao-cheng^1,2

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Abstract

The engineering properties of high arch dam’s foundation rock change inevitably after excavation unloading, consolidation grouting and dam loading. The comprehensive deformation modulus of foundation rock mass is an important index for safety assessment and feedback analysis, but it cannot be obtained by field test. To solve this problem, we conducted researches on the geological condition, deformation test, borehole elastic modulus, and the relation between deformation modulus E₀and longitudinal wave velocity V_pwith Xiluodu hydropower station as an example. On this basis, we put forward a method of determining the comprehensive deformation modulus of foundation rock mass after the completion of high arch dam construction. The comprehensive deformation modulus of Xiluodu high arch dam foundation after construction completed is between 11-14 MPa. This parameter was used for 3-D numerical simulation, and the simulated deformation was in consistency with monitored deformation, which verified this method is appropriate.

Key words

high arch dam / dam foundation / comprehensive deformation modulus / determination of deformation modulus / Xiluodu hydropower station

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LI Pan-feng, CUI Chang-wu, CHEN Kui, ZhANG Shao-cheng. Determining the Comprehensive Deformation Modulus of Foundation after High Dam Constructed[J]. Journal of Changjiang River Scientific Research Institute. 2014, 31(11): 17-21 https://doi.org/10.3969/j.issn.1001-5485.2014.11.0042014,31(11):17-21

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