ANALYSIS OF THE STRAIN-STRESS STATE OF THE PUMPED STORAGE POWER PLANT BUILDING PRESSURE WALL WHILE DESIGNING STRENGTHENING WITH CONCRETE FILLER AND COMPOSITES

Authors:Alexandrov Andrey V., Zertsalov Mikhail G., Baklykov Igor V., Smirnova Marina A., Junhao Zhang

627.8:626.01:693.5
Theme: Hydraulic Engineering, Hydraulics and Engineering Hydrology
Views: 107

Annotation

Purpose: to assess comprehensively the strain-stress state (SSS) of the shield wall of the Zagorsk PSPP-2 building, subjected to significant off-design subsidence, and to develop design solutions for its strengthening using carbon composite materials and concrete filler.

Materials and methods. On-site inspections of the reinforced concrete structure with recording the nature of cracking, measurement of their opening width and length, as well as instrumental tests using the “reinforcement unloading” method to determine the actual stresses in the reinforcement. Additionally, numerical modeling was performed based on a spatial finite element model of the structure, taking into account the geological conditions of the foundation, structural features of the building, the actual reinforcement and defect zones.

Results. The cracks have an inclination from vertical at the upper marks to 45° at the lower ones, which indicates the combined action of bending moments and shear forces. The opening width was 0.15–0.30 mm, while the maximum stress in the reinforcement reached 164 MPa, which does not exceed the standard values. A comparison of the results of field tests and numerical calculations showed satisfactory agreement, confirming the model reliability and the correctness of the chosen approach. Based on the analysis, design solutions for strengthening the shield wall were proposed: the use of carbon composite strips on the inner side and the installation of 300 mm thick “concrete filler” on the outer side, which ensures increased load-bearing capacity, crack resistance, and durability of the structure.

Conclusions. An integrated approach, including field surveys, instrumental testing, and finite element calculations, is an effective tool for assessing the actual condition and developing measures to strengthen reinforced concrete hydraulic structures.

doi: 10.31774/2712-9357-2025-15-4-317-337

Keywords

shield wall, pumped storage power plant building, off-design subsidence, nature of cracking, “reinforcement unloading” method, carbon fiber strengthening and concrete filler apparatus

For quoting

Alexandrov A. V., Zertsalov M. G., Baklykov I. V., Smirnova M. A., Junhao Z. Analysis of the strain-stress state of the pumped storage power plant building pressure wall while designing strengthening with concrete filler and composites. Land Reclamation and Hydraulic Engineering. 2025;15(4):317–337. (In Russ.). https://doi.org/10.31774/2712-9357-2025-15-4-317-337.

Authors

A. V. Aleksandrov – Head of Department, Candidate of Technical Sciences, Design, Survey and Research Institute Hydroproject named after S. Y. Zhuk (125080, Moscow, Volokolamskoye Shosse, 2, 5th floor, room I, room 12), a.aleksandrov@hydroproject.ru;

M. G. Zertsalov – Professor, Doctor of Technical Sciences, Professor, National Research Moscow State University of Civil Engineering (129337, Moscow, Yaroslavskoye Shosse, 26), mzertsalov@yandex.ru, SPIN-код: 3862-4166, AuthorID: 326907;

I. V. Baklykov – Chief Specialist, Candidate of Technical Sciences, Branch of Design, Survey and Research Institute Hydroproject named after S. Y. Zhuk – Research Institute of Energy Structures (125363, Moscow, Stroitelny Proyezd, 7A, room 29), moscow_igor88@mail.ru, SPIN-code: 7987-9045, AuthorID: 915462, ORCID: 0000-0002-8374-9046;

M. A. Smirnova – Engineer, Branch of Design, Survey and Research Institute Hydroproject named after S. Y. Zhuk – Research Institute of Energy Structures (125363, Moscow, Stroitelny Proyezd, 7A, room 29), ORCID: 0009-0004-8259-5091;

Z. Junhao – Postgraduate Student, National Research Moscow State University of Civil Engineering (129337, Moscow, Yaroslavskoye Shosse, 26), weiw0951@gmail.com, SPIN-code: 9747-3842, AuthorID: 1222433, ORCID: 0009-0006-0490-210Х.

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