Settlement Evaluation of a Concrete Face Rock-Fill Dam (CFRD) Using a Back-Analysis Method Based on Measurement Results (A Case Study of Siah-Bisheh Dam)

Abedian, Mohammad Ali; Farrokhi, Farhang; Rasouli, Ramin

doi:10.5614/j.eng.technol.sci.2018.50.4.5

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…It is clear that during the first full storage period, the stress and deformation of the dam body and face slab are distributed with certain regularity. The results for the dam body and the face slab in this paper are similar to those of Xu et al, 41 Kan and Taiebat, 42 and Abedian et al, 44 which are also computed by a generalized plasticity model.…”

Section: Stress and Deformation Of The Damsupporting

confidence: 87%

Prediction and numerical simulation of the face‐slab extrusion damage of Dashixia concrete faced rock‐fill dam

Zhu

Ning

Wang³

2020

Num Anal Meth Geomechanics

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One of the core issues affecting the safety of high concrete faced rock-fill dams (CFRDs) is the extrusion damage of the concrete face slabs. In this paper, the causes of the face-slab extrusion damage under long-term operational conditions are studied. It is found that not only the creep behavior of the dam materials but also the circulating water load in the reservoir is responsible for the uneven deformation of the dam that induces the extrusion damage of the face slabs. The possibility of the potential extrusion damage of the face slab of the Dashixia dam, which is now under construction in Xinjiang, China, is further predicted by means of a three-dimensional finite element analysis (FEA). In the FEA, a unified generalized plasticity model that can reflect the volumetric contraction property during the unloading phase of coarse-grained materials is adopted to overcome the shortcomings of previous studies where the effects of the circulating water load are neglected because of model limitations. Then, combined with an incremental creep model, the long-term operational characteristics of the Dashixia dam are predicted and thoroughly discussed. Moreover, a submodel of the face slab is developed and introduced in the analysis to simulate the compressive stress along the thickness of the face slab. According to the results, it can be concluded that extrusion damage of the face slab of the Dashixia dam may occur under the current design conditions, and it is recommended to take some engineering measures to strengthen the slab. K E Y W O R D S face-slab extrusion damage, high concrete faced rock-fill dam, long-term characteristics 1 INTRODUCTION Recently, concrete-faced rock-fill dams (CFRDs) have rapidly developed worldwide because of their good economic efficiency. Historically, most CFRDs have been designed according to similar engineering experience, 1,2 and there have been some cases of extrusion damage of the face slabs, such as that of the Barra Grande dam and Campos Novos dam (in Brazil), and Tianshengqiao-I and Shuibuya (in China), as seen in Figure 1. It is worth noting that the extrusion damage always occurred within a narrow width range between the slabs near the riverbed, along the compression joint, and in the top area of the slabs. Previous researchers investigated this phenomenon and revealed that the uneven deformation of the rock fill under long-term conditions is the fundamental reason for the extrusion damage of riverbed slabs. 3-5 Khosravi et al. 6 used a 668

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Section: Stress and Deformation Of The Damsupporting

confidence: 87%

Prediction and numerical simulation of the face‐slab extrusion damage of Dashixia concrete faced rock‐fill dam

Zhu

Ning

Wang³

2020

Num Anal Meth Geomechanics

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“…Reliable settlement estimation is vital for monitoring field settlement as construction progresses [13][14][15]. Terzaghi's one-dimensional consolidation theory has been broadly accepted to estimate the potential ultimate settlement [13].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Asaoka and Hyperbolic Methods for Settlement Prediction of Vacuum Preloading Combined with Prefabricated Vertical Drains in Soft Ground Treatment

Pham¹,

Ngo

Tran

et al. 2022

J. Eng. Technol. Sci.

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This study evaluated the use of the Asaoka and hyperbolic methods to estimate the ultimate settlement of soft ground treated by vacuum preloading combined with prefabricated vertical drains. For this aim, a large-scale physical laboratory model was constructed. The model was a reinforced-tempered glass box containing a soil mass with dimensions of 2.0 × 1.0 × 1.2 m (length × width × depth). Physical models of this scale for the same purpose are rare in the literature. The soil was taken from a typical coastal region in Dinh Vu Hai Phong, Vietnam. The surface settlement near and between the two drains was measured right after the vacuum preloading started. Important properties of the soil were tested to evaluate the effectiveness of the treatment method. The measured settlement was used in the Asaoka and hyperbolic methods to predict the potential ultimate settlement. The results showed the superiority of the vacuum consolidation approach in improving fundamental engineering properties of soft soil. Furthermore, the ultimate settlement predicted by both methods showed a good agreement with the measured value, proving that the Asaoka and hyperbolic methods are suitable for the estimation of the ultimate settlement of soft soil treated with vacuum consolidation.

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Plasticity inverse analysis for Zipingpu concrete-faced rockfill dam based on advanced cloud surrogate model via improved Jaya optimization algorithm

Pang

2023

Computers and Geotechnics

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Settlement Evaluation of a Concrete Face Rock-Fill Dam (CFRD) Using a Back-Analysis Method Based on Measurement Results (A Case Study of Siah-Bisheh Dam)

Cited by 4 publications

References 6 publications

Prediction and numerical simulation of the face‐slab extrusion damage of Dashixia concrete faced rock‐fill dam

Prediction and numerical simulation of the face‐slab extrusion damage of Dashixia concrete faced rock‐fill dam

Evaluation of Asaoka and Hyperbolic Methods for Settlement Prediction of Vacuum Preloading Combined with Prefabricated Vertical Drains in Soft Ground Treatment

Plasticity inverse analysis for Zipingpu concrete-faced rockfill dam based on advanced cloud surrogate model via improved Jaya optimization algorithm

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