Investigation of the Influence of the Physical Properties of Landfill Soils on the Stability of Slopes in the Context of Solving Civil Security Problems

2021 ◽  
Vol 1038 ◽  
pp. 407-416
Author(s):  
Nina Rashkevich ◽  
Roman Shevchenko ◽  
Ihor Khmyrov ◽  
Alexandr Soshinskiy
Keyword(s):  
Physical Properties ◽  
Gradual Increase ◽  
Laboratory Studies ◽  
Domestic Waste ◽  
Solid Domestic Waste ◽  
Angle Of Internal Friction ◽  
Stability Of Slopes ◽  
The Stability ◽  
The Mathematical Model

The paper presents the results of laboratory studies of the influence of the physical properties of landfill soils on the stability of slopes, namely, the determination of mechanical properties – the angle of internal friction, specific adhesion, and the shear angle of experimental landslide blocks under conditions of different humidity, density and temperature; determination of physical properties – humidity, temperature and density on the fact of shear of the experimental blocks, taking into account the gradual increase in humidity. The results of laboratory tests are processed using the classical statistical method. This made it possible to confirm the reliability of the mathematical model, which includes the solution of individual tasks for assessing the physical properties of landfill soils, and the corresponding methodology developed on its basis for preventing emergencies associated with shear of landfill soils at potentially hazardous burial sites for solid domestic waste.

scholarly journals I mpact of compaction and thaw conditionson deformation characteristics of thawing soils

2017 ◽  
pp. 58-63
Author(s):  
P. I. Kotov ◽  
L. T. Roman ◽  
M. N. Tsarapov
Keyword(s):  
Physical Properties ◽  
Experimental Determination ◽  
Sandy Loam ◽  
Three Dimensional ◽  
Deformation Characteristics ◽  
Clay Loam ◽  
Laboratory Studies ◽  
Compression Coefficient ◽  
Plane Parallel

The results of laboratory studies of the effect of thawing conditions (plane-parallel or three dimensional) on the deformation characteristics (thawing and compression coefficients) thaw- ing soils (sand, sandy loam, clay loam) with desired physical properties of massive and layered cryogenic textures presented in the article. It was found that the values of the thawing coefficient bigger after three dimensional thawing, and compression coefficient after plane- parallel thaw- ing. The obtained data allowed to establish the applicability of the experimental determination of thawing soils deformation characteristics regardless of thawing conditions.

scholarly journals ANALISIS STABILITAS MENGGUNAKAN MODEL MATERIAL PERALIHAN TANAH-BATUAN

2019 ◽  
Vol 1 (3) ◽  
pp. 225-230
Author(s):  
Putera Agung ◽  
Ardianto A
Keyword(s):  
Stability Analysis ◽  
Friction Stress ◽  
Model Material ◽  
Dam Construction ◽  
Stress Strain ◽  
Angle Of Internal Friction ◽  
Analysis Of Stability ◽  
The Stability ◽  
Selection Of

AbstractAn analysis of stability needs to predict stress-strain values of soil, rock, and/or intermediate material (soil-rock) layers around the gate shaft during excavation works. Selection of stress-strain of intermediate material foccused on this paper will affect to the analysis result. This analysis concerned on some consideration to the selection the stress-strain parameters in determination of c’ and f’ parameters. In excavation works,the parameters were applied to the stability analysis of gate shaft construction of dam construction. The stability analysis used a 2 D software of PLAXIS. Each condition of gate shaft was reinforcement and un-reinforcement wall types. From several analyses, the parameters of c’ and f’ from stress-strain of soil was smaller than intermediate material.Keywords: Cohesion; angle of internal friction, stress, strain, gate shaft.Abstrak Suatu analisis stabilitas perlu untuk memperkirakan besarnya tegangan-regangan tanah, batuan, dan atau lapisan material peralihan tanah-batuan (intermediate material) di sekitar lubang galian vertikal. Pemilihan tegangan-regangan dari material peralihan tanah-batuan yang difokuskan pada paper ini akan berpengaruh terhadap hasil analisis. Analisis ini memusatkan perhatian pada beberapa pertimbangan pemilihan parameter tegangan-regangan dalam analisis stabilitas saluran pengalihn vertikal pada konstruksi dam. Analisis stabilitas ini menggunakan software Plaxis 2 D (dimensi). Masing-masing tipe dinding saluran vertikal ini adalah dengan dan tanpa perkuatan tulangan. Dari beberapa analisis, parameter c’ dan f’ dari tanah adalah lebih kecil dari material peralihan.  Katakunci: Kohesi, sudut geser dalam, tegangan, regangan, saluran pengalihan vertikal.

Groundwater modelling of a weathered gneissic cover

2006 ◽  
Vol 43 (11) ◽  
pp. 1153-1166 ◽  
Author(s):  
Leonardo Cascini ◽  
Giovanni Gullà ◽  
Giuseppe Sorbino
Keyword(s):  
Flow Model ◽  
Unsaturated Flow ◽  
Rainfall Events ◽  
Stability Of Slopes ◽  
Pore Pressures ◽  
Weathered Rocks ◽  
Quiescence Period ◽  
The Stability

Knowledge of the groundwater regime, which is generally necessary in studying the stability of slopes, is of fundamental importance in the analysis of landslides involving intensely weathered rocks, as in the case of a landslide in the western Sila Massif (southern Italy) reactivated by heavy and prolonged rainfall. For this landslide, the total absence of displacements during the actual quiescence period and the long return period of the critical rainfall events did not allow measurement of the critical pore pressures capable of reactivating the landslide. To solve such a problem, a saturated–unsaturated flow model was calibrated taking into account in situ pore pressure measurements acquired over a long period of time. The analyses permitted determination of the role played by the hydraulic heterogeneity of the involved soils and the hydraulic boundary conditions for simulation of the response of in situ pore pressures to rainfall. Such conditions were therefore used to predict the critical unknown values attained during landslide reactivations and were indirectly tested using different models.Key words: landslide, weathered rocks, groundwater monitoring, unsaturated–saturated flow model, rainfall, critical pore pressures.

scholarly journals METHODS FOR THE DETERMINATION OF THE STABILITY OF THE EARTH CONSTRUCTION DEVICE

2017 ◽  
pp. 81-87
Author(s):  
О. L. TIUTKIN ◽  
О. І. DUBINCHIK ◽  
V. R. KILDEEV
Keyword(s):  
Geological Structure ◽  
Calculation Model ◽  
Theoretical Research ◽  
Advantages And Disadvantages ◽  
Earth Construction ◽  
Stability Of Slopes ◽  
Research Findings ◽  
The Stability ◽  
Selection Of

Purpose. Conduct a generalized analysis of methods for assessing the stability of slopes and slopes, which are currently used. An assessment of the stability of slopes and slopes can be carried out only on the basis of a comprehensive study using different methods. Methodology. Theoretical research. Findings. The analysis carried out in the framework of this study to determine the stability characteristics of landslide slopes suggests that the coefficient of stability depends directly on the nature, steepness and geological structure of the slope. Originality. The calculation scheme for determining the coefficient of stability directly depends on the methods chosen. The calculation will be reliable in the event that the corresponding scheme is more accurately and more detailed. Practical value. The use of each of the methods considered provides for the use of a number of special geotechnical surveys and the selection of a calculation model by comparing advantages and disadvantages.

scholarly journals The Development of the Method and Determination of the Relative Abrasiveness of Bulk Substances

2020 ◽  
Vol 207 ◽  
pp. 05003
Author(s):  
Gulmira Akimbek ◽  
Birlesbek Aliyarov ◽  
Shyryn Akimbekova
Keyword(s):  
Physical Properties ◽  
Critical Speed ◽  
Test Material ◽  
Experimental Setup ◽  
Bulk Materials ◽  
Preliminary Results ◽  
Bulk Solids ◽  
Fraction Size ◽  
The Stability

This article touches upon the preliminary results of determining the coefficient of relative abrasiveness of various bulk materials. An experimental setup for determining the abrasiveness of various bulk materials is described, which makes it possible to set the abrasiveness of a material with different physical properties and fractions of the frayed material.It is noted that during experiments it is necessary to ensure the stability of fractions. It is scheduled to determine the critical speed of movement of bulk solids, which eliminates the change in fraction size through grinding when the test material is abraded by samples. It is emphasized that the abrasiveness of the test material is determined on the material recognized as a reference.

scholarly journals Calculation of the slope of the filling reinforced geosynthetic structure on frozen soils

2020 ◽  
Vol 7 (3) ◽  
Author(s):  
Alexey Kazharskii ◽  
Sergey Kudryavtsev ◽  
Anastasiia Borisova
Keyword(s):  
Strain State ◽  
Retaining Wall ◽  
Stress Strain ◽  
Angle Of Internal Friction ◽  
Retaining Structure ◽  
Stress Strain State ◽  
Shear Characteristics ◽  
Restoration Work ◽  
The Stability

The article studies the problem of assessing the possible causes of deformations of the retaining gabion wall, performing calculations of the stability of the retaining wall for the period of restoration work, as well as developing a project to stabilize the deformed section. The aim of the work is to assess the possible causes of deformations of the retaining gabion wall for a certain period of time, to perform calculations of the stability of the retaining wall for the period of restoration work, as well as to develop a project to restore the deformed section. At the first stage of the work, the stability and reliability of the measures for temporary embankment protection were checked for the period of dismantling the gabion retaining wall and building a new retaining structure. At the second stage of work, a design of a retaining structure was developed at the site of the dismantling carried out. As an alternative design of the gabion retaining wall, an armored structure made of geogrid was considered. The analysis of possible causes of deformations is carried out. The calculation of the stability of the retaining wall before/after the measures to strengthen the slope was performed. Calculations of an armored soil wall from a geogrid were carried out in the Midas GTS NX software package, which allows you to perform stability calculations, determine the stress-strain state of the base and structure, determine deformations, forces, etc. The solution to the problem of determining the stability of the structure was made by the method of strength reduction. The search for a solution is carried out on the basis of a sequential decrease (increase) in the shear characteristics of the soil (specific adhesion and the angle of internal friction). The calculation of stability and determination of the stress-strain state are performed. The results of the conducted studies have shown the effectiveness of using geogrids with soil wrapping as an measure to strengthen the slope. The condition for ensuring the stability of the retaining wall is provided if the recommendations for the construction of the retaining structure are followed.

SANITARY-HYGIENIC DISTINCTIONS OF THE APPLICATION OF PROBIOTICS FOR THE TREATMENT OF SOLID DOMESTIC WASTE

2019 ◽  
Vol 2019 (69) ◽  
pp. 82-87
Author(s):  
V.V. Stankevych ◽  
◽  
I.O. Teteniova ◽  
◽  
◽  
...  
Keyword(s):  
Domestic Waste ◽  
Solid Domestic Waste

DETERMINATION OF PERFORMANCE INDICATORS OF THE TRUCK KrAZ-6510TE

2020 ◽  
pp. 19-26
Author(s):  
Olexandr Pavlenko ◽  
Serhii Dun ◽  
Maksym Skliar
Keyword(s):  
Mathematical Model ◽  
Surface Friction ◽  
Building Structures ◽  
Maximum Torque ◽  
Military Equipment ◽  
Military Vehicles ◽  
Force Magnitude ◽  
Vehicle Mobility ◽  
The Mathematical Model

In any economy there is a need for the bulky goods transportation which cannot be divided into smaller parts. Such cargoes include building structures, elements of industrial equipment, tracked or wheeled construction and agricultural machinery, heavy armored military vehicles. In any case, tractor-semitrailer should provide fast delivery of goods with minimal fuel consumption. In order to guarantee the goods delivery, tractor-semitrailers must be able to overcome the existing roads broken grade and be capable to tow a semi-trailer in off-road conditions. These properties are especially important for military equipment transportation. The important factor that determines a tractor-semitrailer mobility is its gradeability. The purpose of this work is to improve a tractor-semitrailer mobility with tractor units manufactured at PJSC “AutoKrAZ” by increasing the tractor-semitrailer gradeability. The customer requirements for a new tractor are determined by the maximizing the grade to 18°. The analysis of the characteristics of modern tractor-semitrailers for heavy haulage has shown that the highest rate of this grade is 16.7°. The factors determining the limiting gradeability value were analyzed, based on the tractor-semitrailer with a KrAZ-6510TE tractor and a semi-trailer with a full weight of 80 t. It has been developed a mathematical model to investigate the tractor and semi-trailer axles vertical reactions distribution on the tractor-semitrailer friction performances. The mathematical model has allowed to calculate the gradeability value that the tractor-semitrailer can overcome in case of wheels and road surface friction value and the tractive force magnitude from the engine. The mathematical model adequacy was confirmed by comparing the calculations results with the data of factory tests. The analysis showed that on a dry road the KrAZ-6510TE tractor with a 80 t gross weight semitrailer is capable to climb a gradient of 14,35 ° with its coupling mass full use condition. The engine's maximum torque allows the tractor-semitrailer to overcome a gradient of 10.45° It has been determined the ways to improve the design of the KrAZ-6510TE tractor to increase its gradeability. Keywords: tractor, tractor-semitrailer vehicle mobility, tractor-semitrailer vehicle gradeability.

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