Decisive design basis and parameters for power plant caverns

Saurer, Erich; Marcher, Thomas; John, Marie

doi:10.1201/b14769-254

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…The size and shape of an underground cavern are important factors that affect its crown deformation. Arch-shaped crowns with straight high walls are the most common shape for underground caverns [2]; this shape provides good stability and minimizes stress concentration. However, larger hydro caverns are being constructed as the demand for power increases.…”

Section: Overview Of Factors Affecting Crown Deformationmentioning

confidence: 99%

“…Previous studies have investigated some aspects of crown deformation in underground caverns, such as the effect of cavern geometry, rock cover, rock type, in situ stress, geology and rock mass properties, and construction practices [1][2][3][4]. However, most of these studies have focused on specific cases or locations and have not provided a comprehensive and systematic analysis of the impact of different parameters on crown deformation.…”

Section: Introductionmentioning

confidence: 99%

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Study on the Impact of Different Parameters on Prediction of Crown Deformations in Underground Caverns

Sudhakar,

Sinha,

Naik

2023

Sustainability

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Crown deformation is a major concern in the design and construction of underground caverns. It can lead to damage to the cavern structure and surrounding infrastructure and can also pose a safety hazard to workers. This paper studies the factors affecting crown deformation in underground caverns. A parametric study was conducted to investigate the effects of seven parameters on crown deformation: rock mass rating (RMR), uniaxial compressive strength (UCS), Young’s modulus of intact rock (Ei), Poisson’s ratio (υ), tensile strength (σt), angle of internal friction (φ), and cohesion (C). The results of the parametric study showed that the following parameters significantly affected crown deformation: RMR, UCS, Ei, and Φ. A multiple linear regression analysis was conducted to develop a regression equation to predict crown deformation. The coefficient of determination (R2) for the regression equation is 92.92%, which indicates that the equation is a good predictor of crown deformation. The parametric study results and the regression analysis can be used to improve the design and construction of underground caverns. By considering the factors that affect crown deformation, engineers can design more stable caverns that are less likely to experience deformations. The results of the study can be used to improve the design and construction of caverns, making them safer and more sustainable.

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Section: Overview Of Factors Affecting Crown Deformationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on the Impact of Different Parameters on Prediction of Crown Deformations in Underground Caverns

Sudhakar,

Sinha,

Naik

2023

Sustainability

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“…Different cavern shapes and their applicability according to rock mass properties and stress conditions[3].…”

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confidence: 99%

Design of underground structures and analysis of self-support capacity

Nagy

2018

Materials and Geoenvironment

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The complicated rock structures and the stability of surrounding rocks of the underground powerhouse are key ground mechanical challenges for hydropower projects. In this paper, an example of contributing self-support capacity of rock mass to evaluate optimised support for long-term usage of structure is given. It describes importance of investigations in the initial in situ stress distribution, rock mechanical and geological properties, engineering rock mass classifications by different methods, numerical modelling, comparison of tools for stability and support analysis and proper stability control for rock excavation and support. The results show that after underground excavations in hard rock, detailed analysis of measures to investigate deformation and self-supporting capacity creation is useful and a cost-saving procedure.

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Effect of separation distance on the mechanical stability and thermal performance of twin hot-water storage caverns

Park

2015

Solar Energy

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Decisive design basis and parameters for power plant caverns

Cited by 3 publications

References 2 publications

Study on the Impact of Different Parameters on Prediction of Crown Deformations in Underground Caverns

Study on the Impact of Different Parameters on Prediction of Crown Deformations in Underground Caverns

Design of underground structures and analysis of self-support capacity

Effect of separation distance on the mechanical stability and thermal performance of twin hot-water storage caverns

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