Mechanism of valley narrowing deformation during reservoir filling of a high arch dam

Li, Biao; Xu, Jianchun; Xu, Weiya; Wang, Huanling; Yan, Long; Meng, Qingxiang; Xie, Wei‐Chau

doi:10.1080/19648189.2020.1763843

Cited by 12 publications

(2 citation statements)

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“…The total strain at a point in a concrete structure consists of two components [21]. One component is the strain due to loads and internal restraints.…”

Section: Calculation Of Measured Stresses Of Concrete Damsmentioning

confidence: 99%

“…Though the reservoir was filled to the normal RWL, the dam heel was still under compression. In addition, the upper valley width was in a state of contraction with the RWL rise [20][21][22]. Therefore, the spatiotemporal distribution characteristics of the Xiluodu Dam during the initial operation stage were comprehensively analyzed in this paper.…”

Section: Introductionmentioning

confidence: 99%

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Stress Prediction Model of Super-High Arch Dams during Their Initial Operation Stages

Cheng,

Han,

2024

Water

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It is of great significance to identify the spatiotemporal stress distribution characteristics to ensure the safety of a super-high arch dam during the initial operation stage. Taking the 285.5 m-high Xiluodu Dam as an example, the spatiotemporal distribution characteristics were analyzed based on the five-year observation data after impoundment. Statistical and boosted-regression-tree-based prediction models for the dam stress were established. The boosted-regression-tree-based prediction model is more accurate than the statistical model. The monitoring indicators for the measuring points of focused locations were determined using the confidence interval estimation method. The results show that the dam was in a compression state, and the arching effect was obvious. The arch direction compressive stress gradually increased and stabilized, and the maximum appeared in the middle of the upstream face of the crown cantilever monolith. For the crown cantilever, the cantilever direction stress at the dam heel was significantly affected by the interior temperature recovery, and the arch direction stress in the middle of the upstream face was significantly affected by the reservoir water level. The measuring points of the focused locations with reliable observation data can be selected as a monitoring index to guide the initial operation.

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“…The total strain at a point in a concrete structure consists of two components [21]. One component is the strain due to loads and internal restraints.…”

Section: Calculation Of Measured Stresses Of Concrete Damsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%