Formation mechanism, deformation characteristics and stability analysis of Wujiang landslide near Centianhe reservoir dam

Sun, Guanhua; Huang, Yaoying; Li, Chunguang; Zheng, Hong

doi:10.1016/j.enggeo.2016.06.025

Cited by 24 publications

(9 citation statements)

References 36 publications

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“…The previous research shows that landslides cause more casualties in developing countries such as India, China, Nepal, Peru, Venezuela and the Philippines [2][3][4]. A landslide is related to seasonal heavy rainfall, erosion excavation at the foot of the slope, unreasonable surcharge at the top of the slope and an unscientific drainage arrangement [5][6][7][8]. These unfavorable factors will accelerate the sliding of a landslide [8].…”

Section: Introductionmentioning

confidence: 99%

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Field Geological Investigations and Stability Analysis of Duanjiagou Landslide

Wang

Xia

Zhang

et al. 2020

IJGI

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This paper analyses the stability of the Duanjiagou landslide on the Bazhong to Guangan Expressway K134–K135 segment in China. The Duanjiagou landslide took place on 4 November 2015. In order to discover the cause of the landslide, we carried out field geological investigations. The indoor physical property experiments were performed by taking the undisturbed soil sample from the borehole cores. To study the strength of the soil, we carried out a saturation direct shear test and saturation residual shear test on sliding zone soil samples. According to the physical properties of soil and the saturated shear strength parameters of sliding zone soil, the stability was analyzed by the landslide force transmission method and numerical simulation method. The results showed that in the initial sliding stage, the safety factor obtained by using the average value of saturated shear strength parameters was in good agreement with the field observation situation. The landslide was at an unstable state. The softening of soil and roadbed excavation at the foot of the slope are the main reasons for landslides.

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Section: Introductionmentioning

confidence: 99%

“…A landslide is related to seasonal heavy rainfall, erosion excavation at the foot of the slope, unreasonable surcharge at the top of the slope and an unscientific drainage arrangement [5][6][7][8]. These unfavorable factors will accelerate the sliding of a landslide [8].…”

Section: Introductionmentioning

confidence: 99%

Field Geological Investigations and Stability Analysis of Duanjiagou Landslide

Wang

Xia

Zhang

et al. 2020

IJGI

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“…In order to obtain the creep model of rockfill for FEM simulations, researchers have conducted large-scale triaxial tests for investigating the time-dependent behavior of coarse granular materials under different stress paths, confining pressures, and moisture contents [28][29][30][31][32][33][34][35][36][37]. e analyses reveal that creep deformation of the rockfill is caused by stress redistribution in the dam body associated with a process of abrasion of sharp corners of stones, particle shape, and particle breakage [38][39][40][41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Long‐Term Settlement of High Concrete‐Face Rockfill Dam by Field Monitoring and Numerical Simulation

Zhou

Sun

Zheng

et al. 2020

Advances in Civil Engineering

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High concrete-face rockfill dams (CFRDs) with heights of over 100 m have been quickly developed in recent years. The self-weight of rockfill materials causes creep deformation of the dam body. However, the creep analysis method of high CFRDs in finite element software is few, and sometimes, it can also not reflect the long-term performance of high CFRDs well. Therefore, it is necessary to carry out the secondary development in finite element software. This study developed a subroutine that can run in Finite Element Method (FEM) platform ABAQUS to simulate long-term creep deformation behavior of the rockfill materials more accurately. Then, a displacement back-analysis for parameters, based on the Xujixia high CFRD project, is performed by the neural network response surface method (BP-MPGA/MPGA). Remarkable agreements are observed between simulation and field monitoring results. The calibrated FEM model is used to predict stress and deformation behavior of the Xujixia high CFRD after three years of operation period. The result indicates that rockfill creep deformation has a significant impact on stress and deformation of the high CFRD during the operation. This research may predict long-term performance using FEM in the design stage for high CFRDs.

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“…It was observed that the availability of masses of loose materials was the most important contributing factor for debris flows. Therefore, rock avalanches and landslides induced by the earthquake would supply abundant solid materials to form subsequent debris flows (Chen et al, 1989;Jiayuan, 1995;Postance et al, 2017;Sun et al, 2016). Gengda township is located in the worststricken area, Wenchuan earthquake not only caused a lot of casualties and economic losses, but also induced numerous secondary geological disasters, which including collapses, landslides and debris flows (Ni et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Stability Analysis of Unfavourable Geological Bodies in a Post-Earthquake Area: A Case Study in Gengda Township China

Zhong¹

2019

Appl. Ecol. Env. Res.

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On 12 May 2008, a devastating mega-earthquake of magnitude 8.0 struck the Wenchuan area, northwestern Sichuan Province, China. Following this earthquake event, many areas in the affected areas were susceptible to geological disasters, such as debris flows, landslides and other secondary disasters. To better understand the mechanism of the formation processes of geological disasters, and to reduce the economic loss caused by the disasters, a comprehensive analysis is required. With the aim of obtaining the characteristics of unfavourable geological bodies, and analysing their stability, we choose the Gengda Township as an example (there are many unfavourable geological bodies distributed in this area, including landslides and deformation bodies). Field investigations and computational models are employed to analyse the stability of the unfavourable geological bodies. Through preliminary analysis and model calculation, the following conclusions can be drawn: under natural conditions, the stability factor of the landslide ranges from about 1.02-1.03, which means that the landslide is in a basically stable or less stable condition. Under the effect of continuous heavy rainfall, the stability factor of the landslide will be significantly reduced, and the corresponding value ranges from 0.9-0.96, which signifies that the landslide is in an unstable condition. For No 1 and No 2 deformation bodies (named by local inhabitants), the stability varied from less stable to unstable, and basically stable to unstable, respectively. On the basis of the results of the calculation, some countermeasures are proposed to mitigate the effects of these disasters probably caused by geological bodies.

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Formation mechanism, deformation characteristics and stability analysis of Wujiang landslide near Centianhe reservoir dam

Cited by 24 publications

References 36 publications

Field Geological Investigations and Stability Analysis of Duanjiagou Landslide

Field Geological Investigations and Stability Analysis of Duanjiagou Landslide

Long‐Term Settlement of High Concrete‐Face Rockfill Dam by Field Monitoring and Numerical Simulation

Stability Analysis of Unfavourable Geological Bodies in a Post-Earthquake Area: A Case Study in Gengda Township China

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