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Arch dams
Published in Bronstein Vadim Izrailovich, Vainberg Alexander Isaakovich, Gaziev Erast Grigorievich, Landau Yuri Alexandrovich, Mgalobelov Yuri Borisovich, Landau Yuri Alexandrovich, Mgalobelov Yuri Borisovich, Ju.B. Mgalobelov, Concrete Gravity and Arch Dams on Rock Foundation, 2021
Bronstein Vadim Izrailovich, Vainberg Alexander Isaakovich, Gaziev Erast Grigorievich, Landau Yuri Alexandrovich, Mgalobelov Yuri Borisovich, Ju.B. Mgalobelov
The disadvantage of the perimeter joint in the arch dam according to French engineers is the lowering of the static indeterminacy of the dam, which does not allow the full use of the strength of the dam concrete and the ability of the arch dams to adapt to a certain extent to the geological conditions of the site. Therefore, as a rule, dams with a perimeter joint have a greater thickness than statically indeterminate arch dams. French engineers did not build a single arch dam with a perimeter joint. According to Russian engineers, the installation of a perimeter is advisable in the construction of arch dams in areas of high seismicity and especially when they are placed in wide sites.
Planning, Project Cost Estimation, and the Future of Small Hydropower (SHP): Large Hydro and Its Various Schemes and Components
Published in Suchintya Kumar Sur, A Practical Guide to Construction of Hydropower Facilities, 2019
Arch dam: An arch dam is a curved structure in plan, having convexity against the flow of water which transfers pressure through arch action to the abutments. It is economical, but a complex structure. It is most suitable for a narrow gorge with strong and firm flanks so that loads being transferred through the arch action to the abutments are sustained.
Overall stability analysis of a high arch dam based on physical modeling and numerical simulation
Published in Heping Xie, Jian Zhao, Pathegama Gamage Ranjith, Deep Rock Mechanics: From Research to Engineering, 2018
Bao-quan Yang, Xu-yuan Guo, Lin Zhang, Xiang Jiao, Yuan Chen, Jian-ye Chen, Jianhua Dong
Jinping I high arch dam has a height of 305 m, the tallest arch dam in the world at present. The watercourse of the dam site area is straight, and the valley is a typical deep “V” shaped canyons. It is featured with complicated geologic structures of various types of faults, dikes, joints and fissures. Figure 1 shows the main structural planes in the rockmass of the abutment. The specific geological features of the faults f5, f2, f13, f14, f18 are presented in Table 1. The general occurrence of lamprophyre dike X is N60° ~ 80°E with a dip angle SE ∠70° ~ 80°. The extend length of the crushed belt is more than 1000 m, while the widths are typically 2.0–3.0 m and up to 7 m. On the right bank, it is mainly composed of slightly weathered rock vein and contact with fault f18, the rock mass quality of the right bank is better than the left bank. On the left bank, the part of the lamprophyre dike X outcrop in the sand slate and in the upper marble that above the elevation of 1680 m is mainly composed of strongly weathered rocks, and owing to the unloading of valley slopes, the rock mass quality of this part is loose, broken and soft, which is easy to soften in water. On the contrary, the part of the lamprophyre dike X outcrop in the lower marble that below the elevation of 1680 m is mainly composed of slightly weathered rocks, the rock mass quality of this part is better.
Effect of abutment movements on nonlinear seismic response of an arch dam
Published in Structure and Infrastructure Engineering, 2020
Although, the reduction of the valley in the periods of initial impoundment does not affect the safety of the Xiluodu arch dam in normal operation conditions, it leads to a risk of grout curtain damage as the dam is subjected to the design earthquake. Moreover, the deformation of the valley is currently unstable and the abutment movement still grows. Therefore, the effect of abutment movement on the behaviour of the arch dam should be concerned, and continuous monitoring of the valley deformation must be an emphasis to ensure the safety of the structure.
Shape optimization based design of arch-type dams under uncertainties
Published in Engineering Optimization, 2018
Nowadays, many arch dams are built for different purposes, e.g. protection against natural hazards, storage of water and generation of electrical power. The structure of an arch dam utilizes upstream curvature to transfer water pressure to the basement on both sides of a valley, which means that the stability of the dam's body is based on the reaction forces in the basement of the abutment instead of its own weight. This structure only develops compressive forces in the dam's body, leading to efficient use of the concrete material.