Numerical Analysis and Back Calculation of Embankment Dam Using Monitoring Results (Case Study: Iran-Lurestan Rudbar)

Ghiasi, Vahed; Heydari, Farzad; Behzadinezhad, Hossein

doi:10.24200/sci.2021.56159.4579

Cited by 3 publications

(3 citation statements)

References 29 publications

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“…The maximum vertical stress occurs at the center of the core. A, B, C, D and E PC: Vibrating Wire Pressure Cell In Figure (7) showed the stress changes curves (…”

Section:   𝑚𝑎𝑥mentioning

confidence: 99%

Analysis and monitoring of behavior Rockfill dam ten years after end of construction ,Case study- Madani dam

Poursorkhabi,

Farajnia,

Zarean

et al. 2024

Preprint

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The purpose of research is to compare monitoring results with those result of numerical analysis and to present plan for the first reservoir impounding of the Rockfill dam ten years after end of constructing the dam body. The stability of dam body has been examined using the results of numerical analysis and the values obtained from the sensors installed in the dam. The correctness and accuracy of the geotechnical parameters of the dam body materials were confirmed by comparing the results of numerical analysis and monitoring based on back analysis. The linear correlation coefficients between the data obtained from the sensors and the numerical analysis results for the items of settlement, pore water pressure and total stress are 84, 67 and 99 %, respectively. The compatibility between the numerical analysis results, design assumptions, and instrumentation results were examined. The value of the arching ratio obtained from the results of instrumentation and numerical analysis in the core of the dam is 0.47 and 0.35, respectively, which indicates the safety of the dam. Ultimately, numerical sensitivity analyses was carried out for presente special impounding program for dam with controlling simultaneous two items the pore water pressure and effective stress changes in the clay core, with ten years passed since the completion of construction dam body.

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“…The maximum vertical stress occurs at the center of the core. A, B, C, D and E PC: Vibrating Wire Pressure Cell In Figure (7) showed the stress changes curves (…”

Section:   𝑚𝑎𝑥mentioning

confidence: 99%

Analysis and monitoring of behavior Rockfill dam ten years after end of construction ,Case study- Madani dam

Poursorkhabi,

Farajnia,

Zarean

et al. 2024

Preprint

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“…In a porous environment, oxygen is transported through small air-filled cavities at lower saturation levels due to the low diffusion coefficient of oxygen in the water. According to research, oxygen is transported in a porous environment primarily through diffusion, as saturation increases through both the aqueous and gaseous phases [44][45][46][47][48][49][50][51][52][53].…”

Section: 𝒗𝑨+гmentioning

confidence: 99%

Numerical Evaluation of Two-dimensional Multi-layer Cover System to Regulate Acid Mine Drainage of Tailing Dams

Marandi

Ghiasi

Badv

2023

IJE

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In the mining industry, cover systems for tailings are an effective means of reducing acid mine drainage. An example of this type of system is the multi-layer cover system that is used in arid climates where the annual evaporation rate is greater than the annual rainfall. For users and designers of mine tailings dams, the current research is aimed at identifying the optimal cover system and engineering of the mine waste disposal site, as well as investigating effective geotechnical parameters in controlling the oxygen gas entering the mine waste disposal site. In this research, after careful examination of scientific literature and data collection, it is first validated using numerical modeling, Finite Element Method (FEM) based on the VADOSE/W software, and then modeling is done based on the collected data. One-dimensional modeling has often been used in studies on the evaluation of cover systems, but in this research, twodimensional modeling has been used to analyze the behavior of coating systems. The key to the successful operation of cover systems is maintaining the storage layer at a saturation level of about 85% throughout the year. The two cover systems, "storage and release", "optimized storage and release," are ineffective in maintaining the storage layer at about 85% saturation. However, the capillary barrier cover system has worked successfully and maintained the degree of saturation of the storage layer at about 80%. Due to the use of low-sulfide waste material as an oxygen-consuming layer, the performance of all three cover systems was acceptable. However, it is worth noting that the capillarity barrier cover system was able to immediately cut off the diffusion of oxygen due to the high degree of saturation of the storage layer, while in the other two cover systems, this decrease in diffusion and oxygen concentration was gradual. Therefore, the capillary barrier cover system is suggested as the most optimal system according to the weather conditions and the type of waste materials.

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“…In [19] selected a concrete dam for the case study and varied the stracture of material tpes and construction, different models of the integrated dam were proposed. Then the elasto plastic analysis of dam-reservoir was performed for six different schemes.…”

Section: Introductionmentioning

confidence: 99%

Structural health monitoring of concrete arch dams using the wavelet transform and modal assurance criterion methods

Giahi,

Asgari Marnani,

Rohanimanesh

et al. 2023

Scientia Iranica

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Structural health monitoring of dams is a necessary issue in water supply network. Not identifying the local damages in these super structures and their extension could lead to abrupt and total collapse and impose major life or financial losses. This research investigates the effects of damage on the concrete arch dams and the methods for their detection. For this purpose the finite element model of a concrete arch dam was analyzed using the wavelet transform once by static frequency analysis and the second time when it is subjected to dynamic accelerograms. In the wavelet transform method using the static frequency analysis, cracks were formed on the dam body and the obtained results were compared to those obtained from Modal Assurance Criterion (MAC) method. In the wavelet transform method, by applying dynamic loads, different damage scenarios, including 16 damage locations and 3 damage levels (change in the materials properties) were compared to the healthy state of the dam. In order to process the wavelet transforms the displacements obtained from the modal and dynamic analyses were utilized. The results showed that employing wavelet transform method by applying dynamic loads could better detect the damages.

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Numerical Analysis and Back Calculation of Embankment Dam Using Monitoring Results (Case Study: Iran-Lurestan Rudbar)

Cited by 3 publications

References 29 publications

Analysis and monitoring of behavior Rockfill dam ten years after end of construction ,Case study- Madani dam

Analysis and monitoring of behavior Rockfill dam ten years after end of construction ,Case study- Madani dam

Numerical Evaluation of Two-dimensional Multi-layer Cover System to Regulate Acid Mine Drainage of Tailing Dams

Structural health monitoring of concrete arch dams using the wavelet transform and modal assurance criterion methods

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