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A. D. Shusharin L. S. Permyakova 《Power Technology and Engineering (formerly Hydrotechnical Construction)》1991,25(10):645-652
| 1. | The most substantial and sharp changes in the state of the rock-concrete contact appeared beginning in 1985 after reaching 76% of the design hydrostatic load. |
| 2. | Opening of the rock-concrete contact is distinguished by a nonuniform rate of change with time and nonuniform distribution of the amplitude of opening along the front of the dam, which reflects the complex interaction the dam with the foundation and effect of inhomogeneity of the foundation and different technological conditions of placing the contact concrete. |
| 3. | Opening of the rock-concrete contact is accompanied by substantial changes in stresses and strains in the rock and concrete of the contact zone and in the piezometric heads in the foundation, reflecting structural changes in it during interaction of the dam with the foundation. |
| 4. | In addition to the effect, which occurs for all types of concrete dams on a rock foundation, of technological factors and design differences of individual parts of the dam on the behavior of the contact zone of the foundation and concrete of the Sayano-Shushenskoe dam, also noted are such features as active opening of the rock-concrete contact over the entire length of the channel part of the foundation, presence of signs of hanging of the arch on the first columns on the banks, and a special stress state of the concrete in the lower part of the upstream face, which can be a reflection of the design features of the gravity-arch dam. |
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A. A. Romanov D. B. Radkevich B. V. Fradkin E. A. Kogan G. Yu. Berdichevskii L. E. Polyak 《Power Technology and Engineering (formerly Hydrotechnical Construction)》1996,30(9):539-544
Conclusions The experience of developing and introducing a computer information diagnostic system for monitoring the safety of hydraulic
structures at the Volga-Lenin hydrostation showed that the new technology and computing machinery make possible a fundamental
change in the established practice of on-site observations and have imparted to them functions of a key link in the process
of routine monitoring of the state of structures and safe operation of the hydro development. This factor has special significance
for structures that have been operating for decades and naturally acquired an increased hazard and vulnerability to the effect
of the environment and aging processes of materials, structural members, equipment, and monitoring and measuring equipment.
A change to computer technology of monitoring the safety of structures of hydrostations is justified both under conditions
of the continuing operation of MME installed earlier without the possibility of its automatic polling and under conditions
of replacing the equipment with newer measuring tools substantially increasing the efficiency of monitoring the state of structures.
Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 9, pp. 25–30, September, 1996. 相似文献
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G. Yu. Berdichevskii V. I. Bronshtein B. V. Fradkin 《Power Technology and Engineering (formerly Hydrotechnical Construction)》1992,26(10):653-668
| 1. | The mathematical model is an effective tool for analyzing and interpreting the data of on-site observations. For such unique dams as the Inguri, it is expedient to develop a model at the design stage and to maintain it in a working state. |
| 2. | A satisfactory agreement of the prototype and calculated stresses (mainly in the zones of contact with the foundation and near the downstream face) is possible only in calculations taking into account the curvilinear distribution of stretches throughout the thickness of the dam. |
| 3. | A correct comparison of the prototype and calculated movements required of the calculation a sufficiently complete consideration of the effect of seepage, primarily uplifting, forces in the rock mass of the foundation. |
| 4. | In view of the considerable effect on the SSS of a dam, the staged character of construction should be taken into account in all estimates of the strength of the structure. Substantial deviations from the calculated scheme of construction during construction should be substantiated by calculating the structure with consideration of the new scheme of construction. |
| 5. | Investigations on the mathematical model played an important role in establishing the physical nature of anomalous phenomena in the left-bank abutment of the plug part of the Inguri dam, having revealed their relation to the presence of a zone of alternating stress. Further investigations on the model are related to consideration of inelastic deformations for predicting the development of destructive processes and evaluating the degree of their danger for the life of the dam. |
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