Distance effects of the fault on the surrounding rock mass stability of the main powerhouse at the Huanggou pumped-storage power station

Ma, Keping; Feng, Bao; Zhuang, Duanyang; Guo, Xin; Gao, Qiang

doi:10.1016/j.tust.2020.103568

Cited by 20 publications

(7 citation statements)

References 26 publications

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“…Previous studies have shown that elastic modulus, dilation angle, and Poisson's ratio have little influence on rock mass stability [29][30][31] . This paper mainly studies the influence law of buried depth and hole span ratio H/D, cohesion c, and internal friction angle φ on the shortest path of finite element strength reduction.…”

Section: Effects Of Different Parameters On Tunnel Strength Reduction Shortest Pathmentioning

confidence: 99%

The Application of the Strength Reduction Shortest Path Method to the Stability Analysis of Shallow Buried Tunnel

Wang

Zhang

2021

Geotech Geol Eng

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：In order to improve the theoretical analysis of surrounding rock stability of shallow buried tunnel. The strength reduction shortest path theory is applied to the stability analysis of shallow buried tunnel surrounding rock, combined with the ultimate equilibrium strength reduction theory. We discussed the influence of the depth and span ratio of tunnel, cohesion, and internal friction angle on the shortest path of the strength reduction, and studied the effects of various factors on shallow buried tunnel safety relationship by using strength reduction factor of safety and the shortest path of the shallow buried tunnel surrounding rock and the grey relational analysis theory. The results show that: In the analysis of shallow buried tunnel in strength reduction, the approximate distribution obeys parabolic between reduction path length and the reduction ratio. When the strength reduction of cohesion is the shortest path the reduction rate is greater than the internal friction angle. The internal friction angle and cohesive force have a great influence on the stability of shallow tunnel under the method of shortest path of strength reduction.Finally, the comprehensive safety factor of shallow buried tunnel calculated by the finite element strength reduction shortest path method is greater than that calculated by the limit equilibrium method.

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Section: Effects Of Different Parameters On Tunnel Strength Reduction Shortest Pathmentioning

confidence: 99%

The Application of the Strength Reduction Shortest Path Method to the Stability Analysis of Shallow Buried Tunnel

Wang

Zhang

2021

Geotech Geol Eng

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show abstract

Section: Effects Of Different Parameters On Tunnel Strength Reduction Shortest Pathmentioning

confidence: 99%

The application of the strength reduction shortest path method to the stability analysis of shallow buried tunnel

Wang

Zhang

Liu

2021

Preprint

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In order to improve the theoretical analysis of surrounding rock stability of shallow buried tunnel. The strength reduction shortest path theory is applied to the stability analysis of shallow buried tunnel surrounding rock, combined with the ultimate equilibrium strength reduction theory. We discussed the influence of the depth and span ratio of tunnel, cohesion, and internal friction angle on the shortest path of the strength reduction, and studied the effects of various factors on shallow buried tunnel safety relationship by using strength reduction factor of safety and the shortest path of the shallow buried tunnel surrounding rock and the grey relational analysis theory. The results show that: In the analysis of shallow buried tunnel in strength reduction, the approximate distribution obeys parabolic between reduction path length and the reduction ratio. When the strength reduction of cohesion is the shortest path the reduction rate is greater than the internal friction angle. The internal friction angle and cohesive force have a great influence on the stability of shallow tunnel under the method of shortest path of strength reduction. Finally, the comprehensive safety factor of shallow buried tunnel calculated by the finite element strength reduction shortest path method is greater than that calculated by the limit equilibrium method.

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“…A PUMPED storage power station (PSPS) uses electrical energy from the low power load to pump water to the upper reservoir and then releases water to the lower reservoir to generate electricity during peak power load periods [1], [2]. Due to its role in grid peak regulation, voltage regulation, energy storage, and power stability control, PSPS have become an important type of hydropower projects around the world [3]. With some of the world's richest water resources, PSPS construction in China has been growing rapidly since 1968.…”

Section: Introductionmentioning

confidence: 99%

Identification and Analysis of Deformation Areas in the Construction Stage of Pumped Storage Power Station Using GB-InSAR Technology

Yang

Liu

Fan

et al. 2023

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

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To meet the needs of the rapid development of new energy sources, China is currently accelerating the construction of pumped storage power stations (PSPS). However, the complex geological environment and large-scale construction can easily cause deformation areas, such as collapse and sliding, on the surface of PSPS. This article adopts ground-based interferometric synthetic aperture radar (GB-InSAR) technology to monitor surface deformation using 206 ground-based radar (GBR) data collected from 2022/07/31 10:24 to 2022/08/06 14:57 with a PSPS in the construction stage in western China. In the selection of permanent scatterers (PSs) for GBR data processing, statistical homogeneous pixels (SHPs) information is considered in this article. Based on the fast SHP selection (FaSHPS) algorithm, we introduce intensity deviations (D I ) to exclude pixels with unstable intensity performance in the temporal dimension and propose the D I + F aSHP S algorithm, which is experimentally proven to have higher SHPs selection accuracy and computational efficiency. By combining with the traditional PSs selection algorithm, the distribution density of monitoring points is effectively improved. In addition, based on the deformation results and on-site survey, this article analyzes and discusses the identified deformation areas in detail from the aspects of natural geography and man-made activities. The results show that the surface is relatively stable overall, except for the effects of man-made activities. This study has demonstrated the remarkable reliability and superiority of the GB-InSAR technology in identifying and analyzing deformation areas in the construction stage of PSPS.

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Distance effects of the fault on the surrounding rock mass stability of the main powerhouse at the Huanggou pumped-storage power station

Cited by 20 publications

References 26 publications

The Application of the Strength Reduction Shortest Path Method to the Stability Analysis of Shallow Buried Tunnel

The Application of the Strength Reduction Shortest Path Method to the Stability Analysis of Shallow Buried Tunnel

The application of the strength reduction shortest path method to the stability analysis of shallow buried tunnel

Identification and Analysis of Deformation Areas in the Construction Stage of Pumped Storage Power Station Using GB-InSAR Technology

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