Determination method for shear strength parameters of rock-soil mixtures using close-range photogrammetry and 3-D limit equilibrium theory

2015 ◽  
Vol 12 (5) ◽  
pp. 1068-1083 ◽  
Author(s):  
Jia-wen Zhou ◽  
Xing-guo Yang ◽  
Zhao-hui Yang
Keyword(s):  
Shear Strength ◽  
Limit Equilibrium ◽  
Equilibrium Theory ◽  
Determination Method ◽  
Shear Strength Parameters ◽  
Strength Parameters ◽  
Close Range Photogrammetry ◽  
Limit Equilibrium Theory ◽  
Close Range ◽  
Soil Mixtures

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

2020 ◽  
Vol 269 ◽  
pp. 105550 ◽  
Author(s):  
Han Zhang ◽  
Xinli Hu ◽  
Daniela Boldini ◽  
Chuncan He ◽  
Chang Liu ◽  
...  
Keyword(s):  
Shear Strength ◽  
Limit Equilibrium ◽  
Shear Strength Parameters ◽  
Strength Parameters ◽  
Limit Equilibrium Methods

scholarly journals Determination of Shear Strength Parameters of Rock Mass using Back Analysis Methods and Comparison of Results with Empirical Methods

2017 ◽  
Vol 2 (11) ◽  
pp. 35
Author(s):  
Ehsan Bakhtiyari ◽  
Ali Almasi ◽  
Akbar Cheshomi ◽  
Jafar Hassanpour
Keyword(s):  
Shear Strength ◽  
Rock Mass ◽  
Limit Equilibrium ◽  
Back Analysis ◽  
Empirical Method ◽  
Crushed Rock ◽  
Empirical Methods ◽  
Shear Strength Parameters ◽  
Strength Parameters ◽  
Engineering Parameters

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

scholarly journals A Determination Method of Rainfall Type Based on Rainfall-Induced Slope Instability

2021 ◽  
Author(s):  
Yafen ZHANG ◽  
Yulong ZHU ◽  
Xiaoyu YAN ◽  
Shu LI ◽  
Qijing YU ◽  
...  
Keyword(s):  
Shear Strength ◽  
Slope Failure ◽  
Slope Instability ◽  
Determination Method ◽  
Shear Strength Parameters ◽  
Strength Parameters ◽  
Failure Initiation ◽  
Soil Shear Strength ◽  
Rainfall Type

Abstract This work presents a determination method of rainfall types based on rainfall-induced slope instability to eliminate the current dilemma of the inconsistent classification of rainfall types. Firstly, 5,808 scenarios of slope instability are simulated with 11 kinds of soil properties under 528 designed intensity-duration (I−D) conditions. Then through analysis of the I−D conditions when slope failure occurred, rainfall is classified into two types: short-duration − high-intensity (SH) type, and long-duration − low-intensity (LL) type. According to the analysis results, it indicates that rainfall types affect the initiation of slope failure, i.e., different I−D conditions will affect the slope failure initiation under LL type rainfall, while the slope failure initiation will not be affected by the change of I−D conditions under SH type rainfall. In addition, the results show that the classification of rainfall types does not depend on the soil shear strength parameters (cohesion and internal friction angle), although the change of soil shear strength parameters will cause the shift of threshold curve of slope failure in the I−D conditions two-dimensional (2D) plane. The findings in this study benefit to understanding the effect of rainfall type on the mechanism of slope failure initiation, which will promote the development of an early warning system of slope failure in the future by considering the identification of rainfall types.

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

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.

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

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

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

2011 ◽  
Vol 255-260 ◽  
pp. 3482-3487 ◽  
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.

Sign in / Sign up

Export Citation Format

Share Document