scholarly journals Slope Stability Problems Along the Main Roads in the Kurdistan Region

2018 ◽  
Vol 7 (4) ◽  
pp. 197
Author(s):  
Varoujan K. Sissakian ◽  
Hassan O. Omer
Keyword(s):  
Slope Stability ◽  
Winter Season ◽  
Road Construction ◽  
Heavy Rain ◽  
Modern Technology ◽  
Kurdistan Region ◽  
Stability Problems ◽  
Geological Conditions ◽  
Different Types ◽  
The Stability

The Kurdistan Region is covered by the relevant net of roads. Since the major parts of the Kurdistan Region are mountainous; therefore, the majority of them are in snake curve form. Construction of roads in mountainous areas will destroy the natural slopes, and when not treated; then different types of landslides will occur. Accordingly, the unstable slopes will cause a lot of risk to the traffic along the roads; endangering the driving along those roads; especially during winter season, and during and/ or shortly after heavy rain showers. The majority of the roads in the Kurdistan Region are planned, designed and constructed without considering the geological conditions, which include four parameters: 1) Type of the rocks and soils, 2) Dip direction and amount, 3) Intensity of joint planes, and 4) Weathering grade of the rocks. These are not considered due to: 1) Cost, 2) Construction’s duration, 3) Choosing easier paths, 4) Absence of experience, 5) Absence of modern technology, 6) Absence of road construction codes, and 7) Ignorance of the factor of safety. We studied different examples from roads in the Kurdistan Region and presented different types of slope stability problems. Moreover, we presented recommendations to keep the stability along unstable slopes.

scholarly journals ANALISIS STABILITAS LERENG MENGGUNAKAN SOFTWARE PLAXIS 8.6 DENGAN DINDING PENAHAN TANAH (RETAINING WALL) (STUDI KASUS RUAS JALAN NASIONAL BANDA ACEH-MEDAN STA 83+135 GUNUNG SEULAWAH)

2018 ◽  
Vol 1 (3) ◽  
pp. 76-82
Author(s):  
Wihardi Wihardi ◽  
Munirwansyah Munirwansyah ◽  
Sofyan M. Saleh
Keyword(s):  
Slope Stability ◽  
Safety Factor ◽  
Retaining Wall ◽  
Road Construction ◽  
Local Area ◽  
Traffic Load ◽  
Road Infrastructure ◽  
The Road ◽  
The Stability ◽  
Banda Aceh

Road infrastructure is very important and is a key enabler for the economy. If the road infrastructure was damaged or had various problems such as sliding, the movement of goods and passengers will be hampered and delayed to the acceleration of development in the local area. The landslide and movement of groundwater is a problem that often occurs repeatedly on some streets. Therefore, it is necessary to study the strengthening of the slopes at the bottom of the road construction with retaining wall. This study aims to analyze slope stability by getting numbers Safety Factor (FK). The analysis is used to analyze the stability of slopesusing the finite element method with the help of software Plaids, The scope of this review includes the calculation of slope stability at the national road from Banda Aceh - Medan Sta. 83 + 185 Mount Selawah. The results of slope stability analysis on the existing condition by using Plaxis software at the point of a review is not safe (FK 1.25). Thus, it is done handling the retaining wall, installation of anchors. Based on the analysis of slope stability after being given the strengthening of the slopes with a retaining wall and the installation of anchors using Plaxis software under the influence of traffic load in an unsafe condition (FK 1.25). Then additional handling is done by changing the angle of the slope so that the value of the safety factor (FK) 1.25.

scholarly journals ROCK SLOPE STABILITY PROBLEMS IN NATURAL SIGHTSEEING AREAS - AN EXAMPLE FROM ARVANITIA, NAFPLIO, GREECE

2017 ◽  
Vol 43 (3) ◽  
pp. 1465
Author(s):  
C. Loupasakis ◽  
D. Galanakis ◽  
D. Rozos
Keyword(s):  
Human Activities ◽  
Active Tectonics ◽  
Rock Slope Stability ◽  
Archaeological Sites ◽  
Protection Measures ◽  
Stability Problems ◽  
Natural Beauty ◽  
Geological Conditions ◽  
The Stability ◽  
Geotechnical Problems

The morphological and geological setting of Greece, the active tectonics and the irrational human activities results to the fact that several natural sightseeing areas or even more, archaeological sites and monuments are located in areas with unfavourable geotechnical conditions. The selection of the proper support and protection measures in most of the cases appear to be very difficult because the applied measures must reassure the minimum aesthetic destruction of the sites. The natural sightseeing area of the Arvanitia walkway, in Nafplio city, is a typical example of site, with extensive human activities, manifesting serious rockfall stability problems. The applied stability analysis pointed out the geotechnical problems and allowed the suggestion of measures for the improvement of the geotechnical behaviour of the rock mass. The measures were planned with respect to the natural beauty and the historical character of the site. Further more, the stability problems located at the slopes of the Kastoria lake walkway are briefly presented. The differences between the two sites revealed the geotechnical problems arising when the landplaning engineers do not take under consideration the engineering geological conditions during the construction of infrastructures.

Analysis of the Relative Position of the Slope and Underground Mining Area and its Influence Properties

2013 ◽  
Vol 634-638 ◽  
pp. 3277-3281 ◽  
Author(s):  
Shi Guo Sun ◽  
Hong Yang ◽  
Chun Sheng Li ◽  
Bao Lin Zhang ◽  
Jia Wang ◽  
...  
Keyword(s):  
Slope Stability ◽  
Underground Mining ◽  
Mining Area ◽  
Open Pit ◽  
Stability Factor ◽  
Mining Depth ◽  
Extracellular Region ◽  
Geological Conditions ◽  
Slope Rock ◽  
The Stability

The stability state of slope rock mass is relating to each other’s relative location during the transformation from open-pit to underground mining, it’s the most disadvantageous influence on the slope stability when the underground mining area is located in the toe of slope, and it’s the best influence as in the slope extracellular region. Slope stability factor changes with the geometric dimensions of underground mining increased, but not in direct proportion. Under the condition of constant geometric dimensions of mining area, the influence on slope stability is changing with the mining depth increased. Thus indicating that the influence on slope stability by underground mining has its spatial property, and to determine the specific influence value requires a combination of many factors, such as the relationship of relative spatial position, the geometric dimensions of mining area, engineering geological conditions and so on.

Elastoplastic-damage-seepage coupling model and numerical algorithm for rock slope stability evaluation

2021 ◽  
pp. 105678952110116
Author(s):  
Mengfei Xu ◽  
Annan Jiang ◽  
Xiurong Yang ◽  
Tengfei Jiang
Keyword(s):  
Slope Stability ◽  
Numerical Algorithm ◽  
Coupling Model ◽  
Stability Evaluation ◽  
Backward Euler ◽  
Geological Conditions ◽  
Calculation Results ◽  
The Stability ◽  
Elastoplastic Damage ◽  
Slope Safety

The stability of slope under complex geological conditions is one of the essential issues in geotechnical engineering. The mechanical damage caused by external force load and the hydraulic property of rock have both significant influences on slope stability. However, the two factors and the coupling process between them are not considered in the traditional slope safety calculation method. Firstly, in this paper, an elastoplastic-damage-seepage coupling model is established based on the modified Mohr-Coulomb (M-C) criterion. This model takes into account the weakening effect of damage on the strength of rock mass. Further, according to the Biot's theory and the evolution equation of permeability coefficient, a complete hydraulic-mechanics (HM) coupling model is established. Secondly, the fully implicit backward Euler algorithm and "strict-cornered" algorithm are used to integrate the stress precisely. The complete coupling analysis of HM is implemented by the step-by-step iterative method. By combining the centrifugal loading method (CLM) with the FEM program, the factor of slope safety (FOS) under the coupling influence of damage-seepage can be solved. The calculation results showed that, compared with the traditional rounded M-C model, the results obtained by the "strict-cornered" algorithm method in this paper are closer to the theoretical solution. The solution process is robust with a global second-order convergence rate. After considering the effects of damage and seepage, the FOS is obviously reduced. Finally, the model is applied to the stability evaluation of an actual engineering. The variation rules of pore water pressure, displacement field, damage zone and FOS are calculated under different head heights. The model built in this paper considers the coupling characteristics of rock seepage-stress-damage well. The proposed numerical algorithm ensures the accuracy and rationality of the calculation results which provides a theoretical foundation for engineering application.

Stability Analysis of Highway Tunnel Portal Slope in Shiyan Area

2011 ◽  
Vol 368-373 ◽  
pp. 2824-2827
Author(s):  
Sheng Li Liu ◽  
Wen Guang Zhao ◽  
Yang Zhang ◽  
He Jie Gao ◽  
Fang Wei Fu
Keyword(s):  
Slope Stability ◽  
Natural State ◽  
Test Results ◽  
Highway Tunnel ◽  
Management Measures ◽  
Geological Conditions ◽  
Mechanism Of Landslide ◽  
The Stability ◽  
Rock Strata ◽  
Tunnel Portal

Under the control of the tow-Yun fracture, the geological conditions are complicated and the rock strata is broken in Shiyan area ,in the northwest of Hubei province, and the rock mass is weathered into fragment. When Highway is built in this area, a lot of tunnel portal slope and landslide problems will be met. To properly solve these problems, it is needed to analyze the slope stability and to propose appropriate management measures. In the paper, taken a highway tunnel portal slope in Shiyan area for example, a detailed research was made on the mechanism of landslide formation, and using laboratory soil test results and the simple Janbu method, the local and global slope stability is calculated. The results show that the slope is stable in natural state, and in heavy rains the stability coefficient is reduced quickly and the slope will be sliding. So the slope needs to manage and the rain water needs to control.

New Results in Dynamics Stability Problems of Elastic Rods

2014 ◽  
Vol 617 ◽  
pp. 181-186 ◽  
Author(s):  
Vladimir Vladimirovich Lalin ◽  
Daria Aleksandrovna Kushova
Keyword(s):  
Elastic Rods ◽  
Geometrically Nonlinear ◽  
Cosserat Theory ◽  
Stability Problems ◽  
New Exact Solutions ◽  
Longitudinal Stiffness ◽  
Different Types ◽  
The Stability ◽  
Nonlinear Dynamic Stability ◽  
Dynamics Stability

This article is about the nonlinear dynamic stability problems of the exact (Cosserat) theory of elastic rods. There is examined the general geometrically nonlinear theory with no restrictions on displacements and rotations being imposed. In this article, it is shown that the variational problem can be defined as the search for the stationary point of the Hamilton’s functional. The new exact solutions of the stability problems for different types of the end fixities of the rod were obtained taking into account bending, shear and longitudinal stiffness.

scholarly journals Failure Analysis of Soil Slopes with Advanced Bayesian Networks

2019 ◽  
Author(s):  
Long Xue He ◽  
António Topa Gomes ◽  
Matteo Broggi ◽  
Michael Beer
Keyword(s):  
Slope Stability ◽  
Bayesian Networks ◽  
Slope Failure ◽  
Theoretical Background ◽  
Geotechnical Parameters ◽  
New Information ◽  
Different Types ◽  
Soil Slopes ◽  
The Stability ◽  
Geotechnical Problems

To prevent catastrophic consequences of slope failure, it can be effective to have in advance a good understanding of the effect of both, internal and external triggering-factors on the slope stability. Herein we present an application of advanced Bayesian networks for solving geotechnical problems. A model of soil slopes is constructed to predict the probability of slope failure and analyze the influence of the induced-factors on the results. The paper explains the theoretical background of enhanced Bayesian networks, able to cope with continuous input parameters, and Credal networks, specially used for incomplete input information. Two geotechnical examples are implemented to demonstrate the feasibility and predictive effectiveness of advanced Bayesian networks. The ability of BNs to deal with the prediction of slope failure is discussed as well. The paper also evaluates the influence of several geotechnical parameters. Besides, it discusses how the different types of BNs contribute for assessing the stability of real slopes, and how new information could be introduced and updated in the analysis.

scholarly journals Rock Slope Stability Evaluation on The Construction of New Road Shortcut 4 Border City of Singaraja – Mangwitani, Bali

2021 ◽  
Vol 940 (1) ◽  
pp. 012006
Author(s):  
D J Sasangka
Keyword(s):  
Slope Stability ◽  
Slope Failure ◽  
Rock Slope ◽  
Volcanic Rocks ◽  
Road Construction ◽  
Development Project ◽  
Rock Slope Stability ◽  
Stability Evaluation ◽  
Planar Slope ◽  
The Stability

Abstract Shortcut 4 new national road development project on Singaraja - Mangwitani section Bali found a potential rock slide slope problem. An outcrop of igneous rock with an intensive joint was not expected to be encountered previously. The excavation work in road construction had to pay attention to the stability of the resulting rock slope considering that apart from the potential for slope failure, rock slope could also threaten the bridge abutment building in front of it. The location of the rock slope was on the edge of Lake Bratan which is geologically part of the early Holocene volcanic rocks, namely mountain rocks composed of tuff, lava and volcanic breccia. Anisotropic andesite slope was controlled by a discontinuous plane with a certain pattern. Rock Quality Assessment was carried out by the Rock Mass Rating (RMR) method and Slope Mass Rating (SMR) for slope stability evaluation. The planar, tople and wedge potensial slope failure were evaluated. The potential for planar slope failure has a value of SMR 30.18 (Unstable), 57.6 (Partialy Stable) for wedge slope failure potential and 47.6 (Partialy Stable) for tople slope failure potential. The SMR value indicated that the rock slope requires engineering threatment to become stable.

The stability and collapse of lava domes: insight from UAS-derived 4D structure and slope stability models

2020 ◽  
Author(s):  
Brett Carr ◽  
Einat Lev ◽  
Loÿc Vanderkluysen ◽  
Danielle Moyer ◽  
Gayatri Marliyani ◽  
...  
Keyword(s):  
Slope Stability ◽  
Lava Domes ◽  
The Stability

ANALISIS KESTABILAN LERENG DINDING AKHIR DI PIT BARATLAUT PADA PENAMBANGAN BATUBARA DI PT. PUTERA BARA MITRA , KECAMATAN MENTEWE, KALIMANTAN SELATAN

KURVATEK ◽  
2018 ◽  
Vol 3 (1) ◽  
pp. 21-34
Author(s):  
Untung Wahyudi ◽  
Excelsior T P ◽  
Luthfi Wahyudi
Keyword(s):  
Slope Stability ◽  
Mining Operation ◽  
Subsurface Water ◽  
Mining System ◽  
Mine Site ◽  
Analysis And Design ◽  
The Stability ◽  
End Wall ◽  
Wall Slope ◽  
Mining Slope

PT. Putera Bara Mitra used open mining system for mining operation, Yet the completion of study on the end wall slope stability that  undertaken by geotechnical PT. Putera Bara Mitra in Northwest Pit and the occured a failure in the low wall on the 1st June 2012 led to the need for analysis and design the overall slope at the mine site. To analyze and design the overall slope, used value of the recommended minimum safety. The value was based on company for single slope SF ≥ 1.2 and SF ≥ 1.3 for overall slope. The calculation used Bichop method with the help of software slide v 5.0. Geometry improvements was done at the low slopes that originally single wall with a 30 m bench height and a slope 70° with SF = 0.781, into 4 levels with SF = 1.305. The analysis explained the factors that affect the stability of the low wall included the mining slope geometry, unfavorable drainase system, material stockpiles and seismicity factors. It was necessary to do prevention efforts to maintain the stability of the slope included the redesign to slope geometry, handling surface and subsurface water in a way to control slopes draining groundwater, vegetation stabilization using and monitoring slope using Total Station with Prism and Crackmeter to determine the movement of cracks visible on the surface. 

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