Experimental and numerical analyses on working performance of a high arch dam with deep-seated joints: Yebatan arch dam, China

Zhang, Wen; Cheng, Yuan; Yang, Bohan; Zhang, Lin; Zhou, Chong; Liu, Xiaoqiang

doi:10.1007/s12517-019-4256-9

Cited by 5 publications

(3 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The YBT hydropower station is located upstream of the Jinsha River and is the 7 th level in the 13-level development plan. The upstream station is the Bolo hydropower station, and the downstream station is the Lava hydropower station [53,54]. The station is located in the lower reaches of the Jinsha River at the mouth of the Jiaogou River, which marks the border between Baiyu County, Sichuan Province and Gongga County, Tibet (Fig.…”

Section: A Study Areamentioning

confidence: 99%

A High-Precision Modeling and Error Analysis Method for Mountainous and Canyon Areas Based on TLS and UAV Photogrammetry

Luo,

Jiang,

et al. 2024

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

View full text Add to dashboard Cite

Obtaining comprehensive and accurate terrain data is important for engineering construction. Unmanned aerial vehicle (UAV) photogrammetry and terrestrial laser scanning (TLS) are two widely used terrain modeling techniques. In mountainous areas, both techniques suffer limitations. These limitations occur in uninhabited areas, primarily caused by the steep terrain and inconvenient transportation conditions, resulting in poor data integrity and inadequate accuracy in UAV and TLS terrain mapping. In this article, we proposed a fusion modeling method based on UAV photogrammetry and TLS for high-precision terrain mapping in mountainous and canyon areas. The proposed method entails the use of TLS data to provide additional control points for UAV modeling, resulting in an improved accuracy of the modeling results. In addition, to quantify the optimization effect of this method, we proposed a 3D model deviation comparison method based on the iterative closest point (ICP) algorithm. This method can be employed to accurately depict the differences in distance and rotation angle between multiple terrain models. We applied this method to the Yebatan hydropower station in Southwest China, which increased the accuracy of the terrain data by 26% and expanded the effective range by over 100%.

show abstract

Section: A Study Areamentioning

confidence: 99%

A High-Precision Modeling and Error Analysis Method for Mountainous and Canyon Areas Based on TLS and UAV Photogrammetry

Luo,

Jiang,

et al. 2024

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

View full text Add to dashboard Cite

show abstract

“…Temperature load is one of the main loads of arch dam 34 . Recent studies show that the arch sealing temperature and residual temperature are the main sources of temperature load uncertainty 35 . In this paper, the arch sealing temperatures are treated as random variables to characterize the uncertainty of temperature load.…”

Section: Case Studymentioning

confidence: 99%

Study on the freeze–thaw effect on concrete arch dam using an improved response surface method

Cai,

Yang,

Yang

2023

Sci Rep

View full text Add to dashboard Cite

The damming materials will be deteriorated during the long-term service of concrete arch dam by weathering, seepage dissolution, freeze–thaw and other factors which will put dams at potential risk. However, there are few researches on the reliability assessment of arch dams considering the effect of material deterioration. In this paper, a prediction model of concrete mechanical properties under freeze–thaw cycles is established using regression analysis. Considering various uncertain factors, a time-varying structural reliability analysis model is established using finite element equivalent stress method and an optimized response surface method with improved sampling strategy and convergence criterion. A case study is later carried out. The results show that, at the early stage of freeze–thaw, the structural failure probability will increase steadily in a small range. However, as the tensile strength of concrete continues to decrease under long-time freeze–thaw action, the reliability of the arch dam structure will suddenly fall off a cliff. The proposed deterioration model and reliability analysis probability model are reasonable and practical and could be serve as a technical support for similar engineering projects.

show abstract

“…All of them have been in service for many years with detailed and reliable monitoring data obtained. From the research and analysis, the working performance of super-high arch dams at the initial stage of impoundment and operation is quite different from that under the design condition [1,2]. The reason is that in the current code [3,4], the influence of nonlinear temperature differences in the dam section is not considered in the temperature load during operation, and the predicted reservoir water temperature is quite different from the measured value.…”

Section: Introductionmentioning

confidence: 99%

Simulation Feedback of Temperature Field of Super-High Arch Dam during Operation and Its Difference with Design Temperature

Hou

Chai

Cheng

et al. 2022

Water

View full text Add to dashboard Cite

Temperature is one of the main loads of super-high arch dams. (1) Background: a super-high arch dam in southwest China was taken as an example in this paper and the temporal-spatial evolution law of dam temperature was analyzed based on the monitoring data. (2) Methods: the finite element simulation analysis method was adopted to invert the boundary conditions of temperature on the upstream surface and the thermal parameters of the concrete, and the temperature evolution process of the arch dam in long-term operation was simulated and analyzed. After the distribution characteristics of the designed reservoir water temperature and the actual reservoir water temperature were compared, the difference in the temperature field of the arch dam during the impoundment and operation under the designed and actual conditions was studied. (3) Results: the temporal-spatial evolution law of the temperature in the dam operation period accords with the conventional knowledge, and the calculated value through simulation feedback is in good agreement with the monitoring value, which can reflect the actual temperature field distribution of the dam. (4) Conclusions: under the design condition, the dam temperature rose slowly after closure grouting and then tended to be stable. Under the actual condition, the temperature rose by 7.1~9.2 °C after closure grouting, reached the highest temperature in about 8~12 years, and fell back to a stable temperature in 40~80 years.

show abstract

Experimental and numerical analyses on working performance of a high arch dam with deep-seated joints: Yebatan arch dam, China

Cited by 5 publications

References 23 publications

A High-Precision Modeling and Error Analysis Method for Mountainous and Canyon Areas Based on TLS and UAV Photogrammetry

A High-Precision Modeling and Error Analysis Method for Mountainous and Canyon Areas Based on TLS and UAV Photogrammetry

Study on the freeze–thaw effect on concrete arch dam using an improved response surface method

Simulation Feedback of Temperature Field of Super-High Arch Dam during Operation and Its Difference with Design Temperature

Contact Info

Product

Resources

About