Rock slope deformation mechanism in the Cihaxia Hydropower Station, Northwest China

Based on hyperbolic nonlinear elastic constitutive model of unloading rock mass, the anchoring rock mass of excavation spillway of a hydropower station has been taken for the study. And considering the impact of excavation unloading process, three reinforcement programs are compared and analyzed. Overall, the constraint by system anchors on deformation of the spillway slope is limited. If the limit on the slope deformation is higher, pre-stressed cables are necessary.

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Complex rock slope deformation at Laxiwa Hydropower Station, China: background, characterization, and mechanism

Bulletin of Engineering Geology and the Environment ◽

10.1007/s10064-018-1371-x ◽

2018 ◽

Vol 78 (5) ◽

pp. 3323-3336 ◽

Cited By ~ 1

Author(s):

Min Xia ◽

Guang Ming Ren ◽

Tian Bin Li ◽

Ming Cai ◽

Tian Jun Yang ◽

...

Keyword(s):

Rock Slope ◽

Slope Deformation ◽

Hydropower Station

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Research on the Deformation Mechanism of Outlet High Slope of Some Hydropower Station Diversion Tunnel

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.99-100.862 ◽

2011 ◽

Vol 99-100 ◽

pp. 862-865

Author(s):

Hua Feng Deng ◽

Min Zhu ◽

Jing Guo ◽

Tao Lu

Keyword(s):

Deformation Mechanism ◽

Slope Deformation ◽

Hydropower Station ◽

Long Term Effects ◽

Reservoir Water ◽

Diversion Tunnel ◽

Reservoir Water Level ◽

Reservoir Impounding ◽

Deformation Law ◽

Rock Mass Deformation

During the operation of outlet high slop of the hydropower station diversion tunnel, the monitoring data shown that the upper slope had an abnormal deformation tendency toward the upstream, which was different from the general slope deformation law. The paper analyzed the deformation mechanism of the high slop outside the hydropower station diversion tunnel in detail based on detailed analysis of the geological data. The analysis shown that the basic reasons of slope deformation were the upper hard and lower soft structure characteristics and the fully developed interlayer shear zone; the excavation unloading, reservoir impounding, reservoir water level change, rainfall, flood discharge atomization, rock weathering, water-rock long-term effects, and some other factors induce and aggravate the rock mass deformation.

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Analysis on deformation mechanism of high rock slope of hydropower station under complex hydrogeology

Microprocessors and Microsystems ◽

10.1016/j.micpro.2020.103733 ◽

2021 ◽

Vol 81 ◽

pp. 103733

Author(s):

Jiadi Geng ◽

Wu-yi Chen

Keyword(s):

Deformation Mechanism ◽

Rock Slope ◽

Hydropower Station ◽

High Rock Slope

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Stability Analysis of Jointed Rock Slope by Strength Reduction Technique considering Ubiquitous Joint Model

Advances in Civil Engineering ◽

10.1155/2020/8862243 ◽

2020 ◽

Vol 2020 ◽

pp. 1-13

Author(s):

Ruili Lu ◽

Wei Wei ◽

Kaiwei Shang ◽

Xiangyang Jing

Keyword(s):

Rock Slope ◽

Reduction Method ◽

Domain Size ◽

Jointed Rock ◽

Strength Reduction ◽

Hydropower Station ◽

Strength Reduction Method ◽

Vertical Side ◽

The Stability ◽

Jointed Rock Slope

In order to study the failure mechanism and assess the stability of the inlet slope of the outlet structure of Lianghekou Hydropower station, the strength reduction method considering the ubiquitous joint model is proposed. Firstly, two-dimension numerical models are built to investigate the influence of the dilation angle of ubiquitous joints, mesh discretization, and solution domain size on the slope stability. It is found that the factor of safety is insensitive to the dilation angle of ubiquitous joints and the solution domain size but sensitive to the mesh discretization when the number of elements less than a certain threshold. Then, a complex three-dimension numerical model is built to assess the stability of the inlet slope of the outlet structure of Lianghekou Hydropower station. During the strength reduction procedure, the progressive failure process and the final failure surface of the slope are obtained. Furthermore, the comparison of factors of safety obtained from strength reduction method and analytical solutions indicates that the effect of vertical side boundaries plays an important role in the stability of jointed rock slope, and the cohesive force is the main contribution to the resistant force of vertical side boundaries.

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