COMPLEX OF GEOPHYSICAL METHODS FOR ASSESSING THE QUALITY OF CONCRETE CASTING DURING CONSTRUCTION OF BOGUCHANY HYDROPOWER PLANT

Vestnik MGSU 9/2017 Volume 12
  • Aniskin Nikolay Alekseevich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor, Director, Institute of Hydraulic Engineering and Power Engineering, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Vasilevskaya Larisa Sergeevna - Branch of the Design and Research and Research Institute “Gidroproekt” named after S.Ya. Zhuk - Center for Geodynamic Observations in the Energy Industry (CSGNEO) Head of the Group, Branch of the Design and Research and Research Institute “Gidroproekt” named after S.Ya. Zhuk - Center for Geodynamic Observations in the Energy Industry (CSGNEO), 2 Volokolamskoe shosse, Moscow, 125993, Russian Federation.
  • Antonov Anton Sergeevich - Design and Research and Research Institute “Gidroproekt” named after S.Ya. Zhuk Engineer, Design and Research and Research Institute “Gidroproekt” named after S.Ya. Zhuk, 2 Volokolamskoe shosse, Moscow, 125993, Russian Federation.

Pages 1019-1026

Subject: as a result of long break in construction of Boguchany HPP and the impact of external climatic and anthropogenic factors, aging and local destruction of concrete gravity dam took place, which necessitated repairs. The article deals with the geophysical methods used to assess the effectiveness of repair work on concrete dam of Boguchany HPP. Goals: the goal of the research was the quality control of works on the “healing” of concrete in the sections of abutment of a concrete dam to a rock-fill dam using a complex of geophysical methods, and determination of elastic and strength properties of concrete. Materials and methods: a set of geophysical non-destructive methods is proposed, including ultrasonic examination and seismotomography. To analyze the obtained materials, histograms and cumulative curves for distribution of values of the obtained velocities of elastic waves of the entire investigated region have been constructed. Results: the study showed that the repair works carried out had a positive effect on the elastic and strength properties of concrete. This is confirmed by a decrease in the area of structure’s regions in which the reduced parameters were observed. Conclusions: the proposed set of research methods has proved its effectiveness. It allowed us to obtain sufficient amount of experimental data on the state and quality of concrete at Boguchany HPP.

DOI: 10.22227/1997-0935.2017.9.1019-1026

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Monitoring the concrete-rock contact seam behavior fromthe upstream dam face to ensure the safety of Boguchany concrete dam

Vestnik MGSU 7/2013
  • Vavilova Vera Konstantinovna - TsSGNEO Branch of JSC Institute Hydroproject named after S.Y. Zhuk +7 (495) 158-06-79, TsSGNEO Branch of JSC Institute Hydroproject named after S.Y. Zhuk, 2 Volokolamskoe shosse, Moscow, 125993, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Yur’ev Sergey Vladimirovich - JSC Institute Hydroproject named after S.Y. Zhuk Chief Design Engineer, JSC Institute Hydroproject named after S.Y. Zhuk, 2 Volokolamskoe shosse, Moscow, 125993, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 157-166

The authors argue that the attention of designers of concrete dams shall be focused on the concrete dam — rock foundation contact zone. The study of the exposure to the rock mass tensile strength in case of the concrete dam sliding is a relevant problem; its resolution may improve the operation of the whole hydraulic engineering structure. The method of selecting the dam safety criteria based on the field test data and laboratory reservoir impoundment observations is a relevant topic for discussion. If the strength margin value is in place, Russian regulations permit the tensile strength break along the concrete - rock contact line.The team led by Yu. A. Fishman and S.Yu. Roza has for a long time been researching into the problem of the limit state of rock foundations of concrete gravity dams. The study of the rock foundation failure, if exposed to horizontal and vertical loads, was also performed by VNIIG (Vedeneev All-Russian Scientific Research Institute of Hydraulic Engineering) and MGSU (Moscow State University of Civil Engineering). Both institutions have discovered that particular attention should be paid to the methodology of identification of shear strength parameters for the analysis of the first limit state to assess the reliability of the concrete dam foundation.The construction of Boguchany HPP plant is close to completion in the KrasnoyarskTerritory. The initial impoundment of the Boguchany reservoir was commenced in April,2012. According to the rock foundation monitoring data, it can be assumed that the behavior of the contact zone exposed to the shear load is in compliance with the pre-set parameters, and it needs further studies to accompany the water level rise. The foundation monitoring data collected in the course of the experiment will let the authors study the behavior of the Boguchany dam to verify the behavior of the dam-rock contact zone exposed to the real conditions of the reservoir impoundment.In the future, the results of these studies will make it possible to establish more precise criteria for the concrete-rock contact zone of the Boguchany dam project.

DOI: 10.22227/1997-0935.2013.7.157-166

References
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  2. Kalustian E.S et all. Restoration of Workability of “Old Dams.” Montreal, 2003, XXI ICOLD, Q. 82, p. 16.
  3. SP 23.13330.2011. Osnovaniya gidrotekhnicheskikh sooruzheniy [Construction Regulations 23.13330.2011. Rock Foundations of Hydraulic Structures.]. Moscow, 2011.
  4. SNiP 2.06.06—85. Plotiny betonnye i zhelezobetonnye. [Construction Norms and Regulations 2.06.06-85. Concrete and Reinforced Concrete Dams]. Moscow, 1996.
  5. Fishman Yu.A. Predel’nye sostoyaniya skal’nykh osnovaniy gravitatsionnykh i arochnykh plotin [Limit States of Rock Foundations of Gravity and Arch Dams]. Trudy Gidroproekta. Sbornik 150. Issledovaniya svoystv skal’nykh porod i massivov v gidrotekhnicheskom stroitel’stve. [Works of Hydroproject Insitute. Collection 150. Study of Properties of Rocks and Rock Massifs in Hydraulic Engineering]. Moscow, Hydroproject Publ., 1993, pp. 5—19.
  6. Lykoshin A.G., Fishman Yu.A., edit. Trudy Gidroproekta. Sbornik 33. Skal’nye osnovaniya gidrotekhnicheskikh sooruzheniy [Works of Hydroproject Institute. Collection 33. Rock Foundations of Hydraulic Engineering Structures]. Moscow, Hydroproject Publ., 1974, 191 p.
  7. Fishman Yu.A. Kriterii soprotivleniya sdvigu i ustoychivosti betonnykh sooruzheniy na skal’nom osnovanii [Criteria of Shearing and Stability Strength of Concrete Structures on Rock Foundations]. Gidrotekhnicheskoe stroitel’stvo [Hydraulic Engineering Construction]. 1984, no. 1, pp. 35—37.
  8. Roza S.A. O prirode soprotivleniya sdvigu opytnogo betonnogo shtampa [On the Nature of the Shearing Strength of the Pilot Concrete Stamp]. Gidrotekhnicheskoe stroitel’stvo [Hydraulic Engineering Construction]. 1966, no. 7, pp. 34—38.
  9. Otsenka sovremennogo sostoyaniya i svoystv prikontaktnoy zony osnovaniya betonnoy plotiny chislennymi raschetnymi po dannym naturnykh nablyudeniy. Etap 1, 2, 3 [Assessment of the Present-day State and Properties of the Concrete Dam - Rock Foundation Near-contact Zone Using the Numerical Analysis Based on the Field Observations. Stages 1, 2, 3.] Moscow, TsSGNEO Publ., 2011—2013, pp. 3—60.
  10. Patton F. Multiple Modes of Shear Failure in Rock. Lisbon, I Congress of the JSMR, 1966, vol. 1, pp. 509—513.
  11. Serafim F. Rock Mechanics Consideration in the Design of Concrete Dams. Conference on State of Stress in the Larch’s Crust. Santa Monica, California, USA, 1963, pp. 611—645.

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