Long-term geophysical observations on the inguri dam rock foundation

Savich, A. I.; Iliin, M. M.; Ezersky, M.; Kalinin, N. I.

doi:10.1007/bf02594235

Cited by 4 publications

(4 citation statements)

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“…Velocity dispersion within failure zone increases. Analogues results were obtained in the Inguri Dam long-term monitoring (Savich et al 1983).…”

Section: Active Zonesupporting

confidence: 75%

“…Therefore, the construction of underground complexes with extended tunnels of tens kilometer long and more than 10 m in diameter, machine halls of 50-60 m high and some hundreds meters long, and concrete dams of some hundreds meters high require to monitor their stability during construction works (Savich and Kujundjich 1990). Such monitoring based on geophysical parameters using seismic geotomography, ultrasonic and acoustic emission methods have been carried out during the constructions of the high concrete dam Ingury Hydro Power Station (HPS) (Savich et al 1983), large underground openings (Acrimony et al 1987, Ezersky et al 1991a, 1992, 1993b, Yamamoto and Ito 1993, Yu et al 2005, Philips et al 2015, repositories (Barta et al 2014(Barta et al , 2016 and tunnels (Ezersky et al 1993a, Luth et al 2014, Maghsoudi and Kalantari 2014. This monitoring is based on exact knowledge of the regularity of geophysical parameters at all stages of rock deformation process from elastic deforming to failure (Pacher 1970).…”

Section: Introductionmentioning

confidence: 99%

“…Behaviors of acoustic parameters in the rock samples during their deforming from zero to failure have been described in Ezersky (1985). The results have been used in design, construction and monitoring large underground structures such as Inguri Hydro Power Station (HPS) in Georgia (Savich et al 1983), Rogun Underground Machine Hall (MH) in Tajikistan (Ezersky et al 1991a), and Hoabinh Underground MH in Vietnam (Ezersky et al 1993b, Ezersky 2017. In this paper, we present results of monitoring carried out in the tailrace tunnel of the Zhinvali Project in Georgia.…”

Section: Introductionmentioning

confidence: 99%

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Geophysical Monitoring of Underground Constructions and its Theoretical Basis

Ezersky

Eppelbaum

2017

IJGE

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Abstract:To avoid damage of rock mass, their collapse into underground space, danger for equipment and risks for human life, during construction and exploitation of large engineering projects (e.g. underground spaces, tunnels, machine halls, etc.) in-situ geotechnical and geophysical monitoring is carried out. Geophysical monitoring is based on observations of the elastic shear-and longitudinal wave velocities (Vs and Vp, respectively) and Acoustic Emission (AE). The behaviors of the elastic velocities and parameters of AE during rock deformation depend on the types of the future failure that, in turn, are defined by the structure and properties of the medium and characteristics of stress state 3/1 and hydrostatic pressure. These velocity variations are defined by difference in effective parameters of forming microfractures, whose geometry is distinguished at different modes of stress state. At that character of interaction between microfractures determines the types of the macrofailure. In this study, we discuss the behaviors of longitudinal wave velocities and acoustic emission during loading of large rock blocks and underground opening orienting measurements along maximum (1) and minimum (3) stresses. It is shown that velocity variations along the maximum stress is more informative at elastic phase of rock deformations (velocity increases), whereas velocity variations along axis of the minimum stress is more informative at the stage of nonlinear rock deformation (velocity begins to decrease during microfractures occurrence). These regularities are well observed at unloading rock mass in the Zhinvali tailrace tunnel where geophysical monitoring assisted in the construction. This knowledge could be used in planning and monitoring the stability of underground structures.

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“…Velocity dispersion within failure zone increases. Analogues results were obtained in the Inguri Dam long-term monitoring (Savich et al 1983).…”

Section: Active Zonesupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Geophysical Monitoring of Underground Constructions and its Theoretical Basis

Ezersky

Eppelbaum

2017

IJGE

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“…Changes in these properties may be detected by geophysical methods such as gravity, seismic, and electrical resistivity (Keller and Frischknecht, 1966;Savich et al, 1983;Sharma, 1997). The high cost of drilling programs for the detection of sinkhole potential has encouraged the investigation of geophysical methods as a tool for sinkhole detection.…”

Section: Introductionmentioning

confidence: 98%