Analysis of slope stability with dynamic overloading from earthquake

Zhao, Ti; Sun, Jinzhong; Zhang, Bin; Li, Cheng

doi:10.1007/s12583-012-0257-2

Cited by 13 publications

(5 citation statements)

References 5 publications

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“…The overload method is to gradually increase the loads to cause structural instability under the condition that the mechanical parameters of the geomaterials are kept unchanged [13][14][15]. In its procedure, the mechanical parameters of the geomaterials are kept unchanged.…”

Section: Overload Methodsmentioning

confidence: 99%

Numerical Stability Analysis of the Dam Foundation Under Complex Geological Conditions at Great Depth: A Case Study of Kala Hydropower Station, China

Zhang

2022

Front. Phys.

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The stability of dam foundations at great depth has always been a challenging problem concerned by designers. This study built a three-dimensional numerical model of the dam and foundation under a complex geological condition in the project area of the Chinese Kala hydropower station. The numerical model was imported into the finite difference software FLAC3D to conduct a numerical simulation. Overload and strength reduction methods were adopted to evaluate the stability of the dam foundation at great depth. The results indicated that the structural faults had an essential impact on the stability of the dam foundation. The stability analysis showed that the safety factor of the dam foundation is greater than 2.5, which met the standard’s requirements. The simulation results can provide a reference for the design and engineering reinforcement of the Kala dam foundation.

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Section: Overload Methodsmentioning

confidence: 99%

Numerical Stability Analysis of the Dam Foundation Under Complex Geological Conditions at Great Depth: A Case Study of Kala Hydropower Station, China

Zhang

2022

Front. Phys.

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“…The methods to calculate the slope seismic stability include pseudo-static analysis, Newmark sliding block analysis, numerical simulation analysis, and so on [3].Pseudo-static analysis is widely applied because it can simplify the dynamic slope stability analysis [4], [5], [6], [7].However, this method cannot reflect the dynamic characteristics of dynamic loading because it takes the dynamic loading as static load. Meanwhile, Newmark sliding block analysis is a method used to evaluate the slope stability according to the seismic permanent deformation, which is essentially an average displacement and cannot reflect the displacement distribution of each point in the rock slope under earthquake loading [8].…”

Section: State Of the Artmentioning

confidence: 99%

Study on the Safety Factors of the Bedding Rock Slope under Dynamic Loading

Liu¹,

He²,

Li³

et al. 2016

JESTR

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Analysis of a bedding rock slope model with a structural surface that connects a splay fracture and penetrates through the slope was conducted based on the strength reduction method to study the dynamic response and deformation process of a rock slope-containing surface. The critical state of the bedding rock slope was estimated using the trend of the key point displacement time history curve. The safety factor and sliding surface were also estimated by the displacement vector diagram of the instable slope. The calculated results were verified by obtaining the safety factor and sliding surface through the displacement vector diagram method used in this paper and comparing them with those obtained using the limit equilibrium method. A preliminary analysis on the effects of the slope height, slope gradient, and bedding inclination on the safety factors of the bedding rock slope under dynamic loading was conducted with the finite difference analysis software, FLAC 3D. Results showed a slight difference between the safety factors of the two different methods, and the sliding surface was consistent with one another in the location, indicating that the method used in this paper was appropriate. The dynamic safety factors of the bedding rock slope gradually decreased with the increase of slope height, significantly decreased with the increase of bedding inclination, and began to stabilize after a dramatic decrease with the increase of slope gradient. Findings offer solid guidance for time-history analysis on the dynamic stability of the rock slope encountering severe earthquakes and long-term stability analysis of the bedding rock slope under dynamic loading.

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“…So in recent years, some scholars did some researches on this. Jiang Tong studied the non-liner effects of rock joint slope under seismic loads, the results indicated that the failure of slopes caused by earthquake is non-liner [1] ; Ye Hailin and Zheng Yingren studied and advanced a new evacuation methods about slope seismic stability [2] ; adopting pseudo-static approach and strength reduction method, Fan Xi'an simulated distribution laws of displacement and stress in slope [3] ; Zhang Daqi conducted seismic time history analysis on rock slope, and found unstable areas by strength reduction method [4] ; Liang Yinchong and Nie Ying analyzed seismic stability of slope in high intensity filed by static method and pseudo-static method [5] ; He Manchao and Wang Chenghu studied seismic stability of high slopes by sarma method, and the results indicated that seismic loads played predominate role in slope stability [6] ; Yan Zhixin, Cai Hancheng and their mates studied deformation laws of rock slopes and soil ones under seismic loads [7] ; Du Xiaoli and her mates did research on the effects of weak interlayer on seismic stability of slopes, and conclusions indicated that the depth and dip angle affected the stability of slope greatly [8] ; Zheng Wenbo and his colleagues studied the effects of pre-stress cables on abrupt slopes under seismic loads [9] ; Zhao Ti put forward a new seismic conception: strength reserve stability and dynamic overloading stability, then interpreted this conception systematically [10] ; Shipal Pal and his mates studied the effects of dynamic loads on slope stability by distinct element method [11] . Inaddition, the Wen Chuan earthquake investigations indicated that many highway slopes were destroyed by seismic loads, and the majority of destroye caused by earthquake were fill slopes.…”

Section: Inductionmentioning

confidence: 99%

Seismic Performance Analysis of Fill Slope with Pre-Stressed Anchors

Jin

Wang

et al. 2013

AMM

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Pre-stressed anchors were widely used to strengthen slopes, in this passage the dynamic responses of fill slope with pre-stressed anchors under the effect of seismic load were simulated by ANSYS program. And it was mainly analyzed the effect of pre-stress anchors on seismic performances of slope under general earthquake. The results indicate that changing the value of pre-stress has little effect on slope deformation, but has larger effect on stress distribution in slope. And with the increases of pre-stress value, stress response on the top of slope is small, the stress concentration in slope is alleviated, while the stress on slope toe increases a little, the seismic stability of slope is improved to some extent. And these conclusions may provide some theory basis for slope seismic design and study.

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Analysis of slope stability with dynamic overloading from earthquake

Cited by 13 publications

References 5 publications

Numerical Stability Analysis of the Dam Foundation Under Complex Geological Conditions at Great Depth: A Case Study of Kala Hydropower Station, China

Numerical Stability Analysis of the Dam Foundation Under Complex Geological Conditions at Great Depth: A Case Study of Kala Hydropower Station, China

Study on the Safety Factors of the Bedding Rock Slope under Dynamic Loading

Seismic Performance Analysis of Fill Slope with Pre-Stressed Anchors

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