scholarly journals Landfill Slope Stability Improvement Incorporating Reinforcements in Reclamation Process Applying Observational Method

2020 ◽  
Vol 10 (5) ◽  
pp. 1572 ◽  
Author(s):  
Eugeniusz Koda ◽  
Agnieszka Kiersnowska ◽  
Jacek Kawalec ◽  
Piotr Osiński
Keyword(s):  
Slope Stability ◽  
Mechanical Performance ◽  
Safety Management ◽  
Precise Determination ◽  
Observational Method ◽  
New Development ◽  
Complex Engineering ◽  
Reclamation Plan ◽  
The Stability

This paper concerns a case study presenting one of the biggest landfills in Poland that required application of complex engineering works to extend the deposing capacity of the structure. The shear strength parameters of the subsoil and waste material used for analyses were based on geotechnical investigation and were then applied in slope stability analyses of the landfill. For the purpose of safety management of the new development and reclamation plan for the landfill, an observational method was applied to increase the geotechnical safety of the structure. The slope reinforcement methods mainly included the geogrid, geocomposite, and berms construction. However, much of the uncertainty associated with the stability of the geogrid-reinforced slope is related to the time-dependent deformation of geosynthetic materials. For the purpose of changes in the geogrid parameters with time, the samples were excavated from the landfill slope after 20 years of exploitation and analyzed in the laboratory. The tests allowed precise determination of the material properties, changing geometry, and mechanical properties like tensile strength and strain. Obtained results were compared to parameters of the brand-new geogrid samples. The tests indicated only insignificant changes in geosynthetics, physical, or mechanical performance properties, and the slope has not been compromised in its stability or performance.

scholarly journals Stability Assessment of High and Steep Cutting Rock Slopes with the SSPC Method

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Hongliang Tao ◽  
Guangli Xu ◽  
Jingwen Meng ◽  
Ronghe Ma ◽  
Jiaxing Dong
Keyword(s):  
Slope Stability ◽  
Rock Slope ◽  
Equilibrium Analysis ◽  
Rock Slope Stability ◽  
Rock Slopes ◽  
Evaluation Indexes ◽  
Weathering Degree ◽  
Slope Rock ◽  
The Stability

The stability of high rock slopes has become a key engineering geological problem in the construction of important projects in mountainous areas. The original slope stability probability classification (SSPC) system, presented by Hack, has made obvious progress and been widely used in rock slope stability analysis. However, the selection and determination of some evaluation indexes in the original SSPC method are usually subjective, such as intact rock strength and weathering degree. In this study, the SSPC method based on geological data obtained in the prospecting tunnels was presented and applied. According to the field survey and exploration of the prospecting tunnels, the weathering degree of the slope rock mass was evaluated. The empirical equation for the maximum stable height of the slope was applied to the slope stability evaluation in the presented SSPC method. Then, the slope stability probability of numerous cutting slopes in the sandstone unit was evaluated using the presented system. Results of the Geostudio software based on the limited equilibrium analysis of the investigated slopes were compared with the results obtained by the SSPC method. The results indicate that the SSPC method is a useful tool for the stability prediction of high and steep rock slopes.

scholarly journals Money Supply Model in Muslim Countries

2019 ◽  
Vol 7 (2) ◽  
pp. 233-241
Author(s):  
Nanda Suhanda ◽  
Hamdan Firmansyah
Keyword(s):  
Economic Growth ◽  
Monetary Policy ◽  
Precise Determination ◽  
Policy Makers ◽  
Muslim Countries ◽  
Supply Model ◽  
Main Thing ◽  
The Stability ◽  
Value Of Money

Efforts to control economic conditions in a country are called monetary policy. The main thing is to regulate the stability of the value of money and the amount of money circulating in the homeland of each country. This macro policy is expected to be able to respond to micro economic growth so that real economic growth will be realized. The economic success of a country is largely determined by the precise determination of monetary policy. This policy was created in response to the microeconomics which was then managed in a macro manner by policy makers. This policy making step must be in accordance with the sharia scenario so that the economic growth is expected to get a blessing so that falah is the ultimate goal of the economy as well as being realized as the policy is taken. A literature review was finally taken in order to find answers to this essential monetary policy concept. The final goal of the discussion of sharia economic policy is to maintain and maintain the stability of the country's economy.

scholarly journals Determination of Rock Slope Stability Using Stereographic Projection between Sulav and Amadiyah Resorts

2021 ◽  
Vol 18 (1) ◽  
pp. 36-43
Author(s):  
Hadeer Ghazi Adeeb ◽  
Ibrahim S. I. AL-JUMAILY
Keyword(s):  
Slope Stability ◽  
Rock Slope ◽  
Bedding Plane ◽  
Rock Slope Stability ◽  
Geological Discontinuities ◽  
Wedge Sliding ◽  
The Stability ◽  
Steep Slopes ◽  
Rock Slides

Geological discontinuities play a significant role in the assessment of rock slope stability. Rock slope stability has been studied on the main road between Sulav and Amadiya resorts in Duhok governorate on the southern limb of Mateen anticline, to determine the expected rock slides on this road. Five (5) stations were chosen to study these rock slides that may occur on these steep slopes. All these stations within Pila Spi Formation that consists of hard dolomitic limestone and covering the areas from Sulav resort towards Amadiya district with a length of up to 2.5 Kms. The Stereographic analysis was used to study and classify the stability of these slopes. The analysis showed in all stations the possibility of plane sliding to happen on the bedding plane, and the wedge sliding between the bedding plane and planes of all joint sets, as well as the occurrence of rockfall on some stations.

scholarly journals Rachis morphology cannot accurately predict the mechanical performance of primary feathers in extant (and therefore fossil) feathered flyers

2017 ◽  
Vol 4 (2) ◽  
pp. 160927 ◽  
Author(s):  
John Lees ◽  
Terence Garner ◽  
Glen Cooper ◽  
Robert Nudds
Keyword(s):  
Structural Properties ◽  
Mechanical Performance ◽  
Bending Moment ◽  
Precise Determination ◽  
External Diameter ◽  
Strongly Correlated ◽  
Primary Feather ◽  
Second Moment ◽  
Three Point Bending

It was previously suggested that the flight ability of feathered fossils could be hypothesized from the diameter of their feather rachises. Central to the idea is the unvalidated assumption that the strength of a primary flight feather (i.e. its material and structural properties) may be consistently calculated from the external diameter of the feather rachis, which is the only dimension that is likely to relate to structural properties available from fossils. Here, using three-point bending tests, the relationship between feather structural properties (maximum bending moment, M max and Young's modulus, E bend ) and external morphological parameters (primary feather rachis length, diameter and second moment of area at the calamus) in 180 primary feathers from four species of bird of differing flight style was investigated. Intraspecifically, both E bend and M max were strongly correlated with morphology, decreasing and increasing, respectively, with all three morphological measures. Without accounting for species, however, external morphology was a poor predictor of rachis structural properties, meaning that precise determination of aerial performance in extinct, feathered species from external rachis dimensions alone is not possible. Even if it were possible to calculate the second moment of area of the rachis, our data suggest that feather strength could still not be reliably estimated.

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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