The purpose: to conduct field studies to determine the vertical settlement in the body and assess the safety of the earthfill dam of the Lyangar reservoir. One of the ways to ensure the safe condition of earthfill dams during operation is to conduct field studies in the facility. One of the factors leading to the overflow over the structure crest is the settlement of the earthfill dam body. Excessive settlement of the earthfill dams of reservoirs are assessed on the basis of observational data and design documentation. In practice, the settlement of earthfill dams during the operational period should not exceed the values specified in the project. The quantitative determination of the settlement of the earthfill dam body was carried out on the basis of the requirements specified in the regulatory documents.
Materials and methods. In the process of research, theoretical and generally accepted detection methods of vertical deformations on the crest of an earthfill dam using geometric leveling were used. The research and verification of tools was carried out in accordance with regulatory documents before carrying out the work.
Results. Geodetic measurements were carried out on the example of the earthfill dam of the Lyangar reservoir. Repeated geodetic measurements (the second cycle) for determining the settlement of the earth dam crest were carried out. The longitudinal profile of the crest of the object under consideration was constructed on the results of geodetic measurements. During the observation period, the settlement of the earthfill dam crest was 15 mm in the first cycle and 18 mm in the second cycle.
Conclusions. The indicators obtained as a result of geodetic measurements, when compared with the indicators given in the regulatory documents, testify that the safe state of the structure is ensured, which does not lead to water overflowing over the earthfill dam crest.
doi: 10.31774/2712-9357-2023-13-4-385-395
earthfill dam, operation, reservoir, settlement, water overflow, destruction, crest
Paluanov D. T., Ospanova D. K. The results of field studies of the settlement of an earthfill dam body. Land Reclamation and Hydraulic Engineering. 2023;13(4):385–395. (In Russ.). https://doi.org/10.31774/2712-9357-2023-13-4-385-395.
1. Bakiev M.R., 2018. Analiz problem nadezhnoy i bezopasnoy ekspluatatsii gruntovykh plotin vodokhranilishchnykh gidrouzlov [Problem analysis for reliable and safe operation of earthfill dams of reservoir waterworks systems]. Irrigatsiya i melioratsiya [Irrigation and Land Reclamation], no. 3(13), pp. 10-13. (In Russian).
2. Volosukhin V.A., 2014. Faktory, opredelyayushchie bezopasnost' gidrotekhnicheskikh sooruzheniy vodokhozyaystvennogo naznacheniya [The factors defining safety of hydraulic engineering constructions of water management appointment]. Monitoring: nauka i bezopasnost' [Monitoring: Science and Safety], no. 3(12), pp. 7-8. (In Russian).
3. Gapparov F.A., Narziev Zh.Zh., 2018. Prognozirovanie i predotvrashchenie perepolneniya vodokhranilishcha [Prediction and preventing reservoir overflow]. Povyshenie effektivnosti, nadezhnosti i bezopasnosti gidrotekhnicheskikh sooruzheniy: materialy konferentsii [Improving the Efficiency, Reliability and Safety of Hydraulic Structures: Proc. of the Conference]. Tashkent, TIIMSKh Publ., pp. 196-199. (In Russian).
4. Zharnitsky V.Ya., Andreev E.V., 2013. Problemy ekspluatatsionnoy nadezhnosti i bezopasnosti gruntovykh plotin [Problems of operational reliability and safety of earthfill dams]. Izvestiya vuzov. Geodeziya i aerofotos"emka [News of Universities. Geodesy and Aerophotosurveying], no. 1, pp. 42-47. (In Russian).
5. Makhmudov E.Zh., Paluanov D.T., 2017. Organizatsiya monitoringa bezopasnosti krupnykh i osobo vazhnykh vodokhozyaystvennykh ob"ektov [Organization of safety monitoring of large and especially important water resource objects]. Puti povysheniya effektivnosti oroshaemogo zemledeliya [Ways of Increasing the Efficiency of Irrigated Agriculture], no. 3(67), pp. 134-139. (In Russian).
6. Ospanova D.K., 2022. Faktory, vliyayushchie na bezopasnost' ekspluatiruemykh zemlyanykh plotin [Factors affecting the safety of operated earthfill dams]. Innovatsionnye resheniya tekhnicheskikh, inzhenerno-tekhnologicheskikh problem proizvodstva: materialy konferebtsii [Innovative Solutions to Technical, Engineering and Technological Problems of Production: Proc. of the Conference]. Pt. 2, Jizzakh, pp. 245-247. (In Russian).
7. Aldulaimi A.A., 2021. Safety evaluation of the Chamrga earth dam. A seepage deformation, and stability analysis with GeoStudio. IOP Conference Series: Earth and Environ-mental Science, 664, 012075, DOI: 10.1088/1755-1315/664/1/012075.
8. Balmforth N.J., von Hardenberg J., Provenzale A., Zammett R., 2008. Dam breaking by wave-induced erosional incision. Journal of Geophysical Research: Earth Surface, vol. 113, iss. 1, F01020, DOI: 10.1029/2007JF000756.
9. Jafarzadeh F., Garakani A.A., Maleki J., Banikheir M., 2019. Safety measures for earth dams on basis of instrumentation data, dam site location and reservoir volume. Sustainable and Safe Dams Around the World, pp. 2284-2297, DOI: 10.1201/9780429319778-204.
10. O bezopasnosti gidrotekhnicheskikh sooruzheniy [On safety of hydraulic structures]. Law of the Republic of Uzbekistan of 30 August, 2023, no. ZRU-865, available: https:lex.uz/ru/pdfs/6588809 [accessed 01.10.2023]. (In Russian).
11. Pravila provedeniya naturnykh nablyudeniy za rabotoy betonnykh plotin [Rules for Conducting Field Observations of the Operation of Concrete Dams]. JSC VNIIG named after B.E. Vedeneev, St. Petersburg, 2003, 22 p. (In Russian).
12. Ospanova D.K., 2022. The results of vertical movement of operating earth dam. Cutting-Edge Science 2022: International Scientific and Practical Conference. Shawnee, USA, pp. 59-61, https:doi.org/10.5281/zenodo.7768954.
13. Bakiev M.R., Rakhmatov N.T., 2020. Nadezhnoe i bezopasnoe ispol'zovanie gidrotekhnicheskikh sooruzheniy: uchebnik dlya vuzov [Reliable and Safe Use of Hydraulic Structures: textbook]. Yoshlar nashriyot uyi, 248 p. (In Russian).
14. Ospanova D.K., Paluanov D.T., 2022. Povyshenie bezopasnosti ekspluatatsii zemlyanykh plotin [Improving the safety of operation of earthfill dams]. Materialy periodicheskikh konferentsiy [Proc. of Periodic Conferences]. Pt. 16, Tashkent, pp. 21-22. (In Russian).
