Evaluation of the shear strength parameters of a compacted S-RM fill using improved 2-D and 3-D limit equilibrium methods

In this study, using the collected data from 4 slope failures in one of the central mines of Iran, the shear strength parameters of jointed and crushed rock masses using back analysis method are calculated and its results are compared with the values obtained from the empirical methods. In this regard, firstly, the identification of failures is investigated and then geometrical and geological engineering parameters of slopes are collected and recorded by field survey. At this stage, using the Hoek-Brown criterion, shear strength parameters of the rock mass are estimated. Then, using appropriate software for slope stability analysis (limit equilibrium method software: SLIDE and numerical method software: FLAC), and assuming that safety factor is one, the shear strength parameters for sliding surfaces are determined. Finally, the results obtained from this analysis are compared with the results of the empirical methods and then suggestions are made to modify the input data of empirical method

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The 22 February 2018 landslide mechanism in Pasir Panjang Village, Brebes Regency, Central Java, Indonesia

Journal of Applied Geology ◽

10.22146/jag.53255 ◽

2019 ◽

Vol 4 (2) ◽

pp. 92

Author(s):

Wahyu Wilopo ◽

Adam Raka Ekasara ◽

Hendy Setiawan ◽

Dwikorita Karnawati

Keyword(s):

Shear Strength ◽

Slip Surface ◽

Pore Water Pressure ◽

Limit Equilibrium ◽

Water Pressure ◽

Back Analysis ◽

Silty Sand ◽

Shear Strength Parameters ◽

Strength Parameters ◽

Central Java

On 22 February 2018 landslide occurred in Pasir Panjang Village, Salem District, Brebes Regency of Central Java Province, Indonesia. About 8 people were died, 4 people were injured and several infrastructures were damaged due to this landslide. This research is carried out to understand geological-geotechnical condition and to study the initiation mechanism of the landslide. Field investigation and UAV mapping are carried out to detect slip surface and define slope geometry. The rainfall-induced pore-water pressure is estimated by using the Slope Infiltration Distributed Equilibrium (SLIDE) model. Then, limit equilibrium method is used to estimate the safety factor of the slope, while the shear strength parameters are determined by applying back analysis approach that compared with data from laboratory tests. The results show that landslide occurred in permeable layer of silty sand overlaid above impermeable andesitic breccia. Results from back analysis indicate that the shear strength parameters and rainfall intensity are strongly influence the stability of slope against landslide.

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Soil suitability estimation for housing purposes in landslide-prone areas. The case of Karya village, Patras, W. Greece

Bulletin of the Geological Society of Greece ◽

10.12681/bgsg.17072 ◽

2007 ◽

Vol 40 (4) ◽

pp. 1683

Author(s):

G. Koukis ◽

N. Sabatakakis ◽

S. Lainas

Keyword(s):

Shear Strength ◽

Slope Stability ◽

Limit Equilibrium ◽

Shear Strength Parameters ◽

In Situ Testing ◽

Strength Parameters ◽

Soil Suitability ◽

The City ◽

Heavy Rainfalls

This paper discusses a method of soil suitability estimation for housing purposes in landslide-prone areas based on engineering geological criteria. The studied places, Karya and Neo Souli villages are located on the eastern part of the city of Patras. Several instability problems were identified triggered by heavy rainfalls, especially during extreme meteorological events. The soil formations were classified in several geotechnical units while typical geotechnical profiles and slip sections were drawn. Limit equilibrium slope stability analyses were established in order to investigate the critical slide conditions, using shear strength parameters estimated from laboratory and in-situ testing. The studied area was finally divided into five zones according to the suitability of the encountered ground regarding housing purposes

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Back Analysis about Shear Strength and Deformation Parameters of High Excavated Accumulation Slope in Xiaowan Hydropower Station

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.255-260.3482 ◽

2011 ◽

Vol 255-260 ◽

pp. 3482-3487 ◽

Cited By ~ 1

Author(s):

Le Hua Wang ◽

Jian Lin Li ◽

Shan Shan Yang ◽

Zhuang Cheng ◽

Min Zhu

Keyword(s):

Shear Strength ◽

Rock Mass ◽

Limit Equilibrium ◽

Strain Analysis ◽

Hydropower Station ◽

Shear Strength Parameters ◽

Strength Parameters ◽

Stability Calculation ◽

Deformation Parameters ◽

Accumulation Slope

Proper mechanical parameters of slope rock mass are the premise which ensures the smooth progress of slope stability calculation. By analyzing the geological information of the yinshuigou accumulation slope on ridge 2 in Xiaowan hydropower station, and according to the deformation and damage in the excavation of the accumulation slope, this paper inverts the shear strength parameters of the accumulation slope by using 2D rigid limit equilibrium method. On base of unloading rock mass mechanics methods, the stress and strain analysis to the accumulation slope is studied by using 3D finite difference method, and by contrast of the monitoring displacement and calculated displacement in slope-direction about the key point of the accumulation slope , the article inverts the deformation parameters of the accumulation slope. Finally, the shear strength parameters in the contact zone are ascertained as: C=0.04MPa, Φ=30°, and the deformation parameter of the accumulation slope is changed from the initial 1.5MPa to 0.95MPa by the damage unloading.

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