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Hydraulic structure Palcmansk? Ma?a is located in the eastern part of Slovakia, on the Hnilec River. Its main function is to produce electricity and flood control. It is in operation more than 60 years. The reservoir was created by damming up the river valley by concrete gravity dam. The bedrock of the dam is formed by phyllite rocks. The results of the water pressure tests confirmed the need to build a grout curtain in its subsoil. The safety of these structures is significantly determined by the uplift developme...

The article deals with determination of shear strength properties of improved coarse - grained soils using a large-dimensional direct shear test apparatus. A road embankment in front of a new bridge over the Danube River in the Komarno city will be made of the gravel improved by the cement. Aim of the analysis is determination of the shear strength properties of this improved material for optimal and reliable design of the road embankment. The shear strength of gravel was determined in the SHEARMATIC 27-WF2304 she...

The Ogosta Valley downstream the town of Chiprovtsi, NW Bulgaria, was subject to long-lasting contamination with arsenic and other toxic elements due to mining and ore-processing activities in the second half of the last century. Although the exploitation of lead-silver and iron ores was ceased in the end of the 90`s, the soil in particular sections of the Ogosta?s river floodplain remained highly contaminated with arsenic, lead and other heavy metals. Arsenic mobilization and transport in the vadose zone is highl...

In recent years ,highway of our country grows vigorously now has become a stimulating domestic demand in the highway construction, and the important factors that promote the rapid development of national economy, it attaches great importance to by governments at all levels, highways extending unceasingly, also provides favourable conditions for the development of road transport. To solve the above problems in practical engineering, we must be to deal with natural foundation, and road in deep soft soil, after proce...

The contribution brings description of the mechanical properties of igneous rocks, particularly syenite from Kamenn? quarry within the T?eb?? Massif in Czech Republic. It is mainly focused on impact of triaxial compression testing in order to obtain data about the rock applicable for designing underground structures located at greater depths below the surface. The mechanical properties were determined from series of laboratory tests consisting of following procedures: (1) indirect tensile testing, (2) uniaxial com...

This research paper seeks to study the phreatic groundwater body from the Buz?u river alluvial fan. This goal is reached by creating a numerical model associated to a previously created conceptual model. The conceptual model was realized in three stages. Initially, a spatial schematization of the hydrostructure was created using the lithology collected while executing the hydrogeological boreholes. The second step consisted in studying the variation of the hydrogeological parameters in the hydrostructure. The para...

Oil and gas exploration in Bulgaria has been mainly conducted in Northern Bulgaria. Up to 2500 boreholes have been drilled on the territory of the country so far with a depth of several hundred meters to more than 6000 m. During drilling, groundwater with different hydrochemical properties, often with high total dissolved solids (TDS) and contents of a number of elements, have been registered. After the completion of the drillings, many of them have not been liquidated, as in some of the boreholes artesian water o...

The Road materials are exposed during the operation to the effects of traffic loads and climatic influences, in particular changes in air and humidity temperatures, which are reflected by cyclical changes in pavement and subsoil. Strain of different materials is very different its the same load and depend on its deformation properties. Strain of material and substance are generally characterized by deformation characteristics that are an important input for the calculation of stresses and deformation of the paveme...

The fundamental element to be ensured during laboratory tests is the control of the boundary conditions in terms of stress, strain and drainage conditions. The determination of the effective stresses is inherently associated with full saturation of soil specimen, as it allows to apply the Terzaghi's principle of effective stress. This paper describes the influence of partial saturation of soil on shear strength and deformation properties obtained from laboratory tests. The use of back pressure method, as the most ...

The article presents a failure of an existing road culvert located in the provincial road embankment that was built on an organic soil. Recommended road designing methods require the involvement of high volume of native soils. The problem occurs when there are only weak soils in the area. The particular group of soils consist of organic soils. Even in the case of the organic soils, there are several different methods for safe settlement of the designed road surface. In current case in order to reduce the settlemen...

This article presents the numerical analysis results obtained with a finite element of a corrugated steel box culvert. This article also presents the analysis of the main characteristics of the backfill soil, as well as predicting the value of the material properties. The analyses the plastic soil behavior and its interaction with buried flexible structures. Among all the theories available, three different theories were selected that describe the model properly. The theories used and compared are called Mohr Coul...

Nonwoven geotextiles have been used as filter and drainage materials in geotechnical works in the past 40 years. Geotextiles are easy to install and they help to minimize clogging effect of drainage systems, however sometimes geotextiles may not drain water as effectively as was expected. Drainage and filter layers have to cope with more severe clogging mechanism (chemical, biological and physical). Clogging, which involves the accumulation of material within the void space of drainage medium, is a problem in drai...

This study delineates groundwater potentiality assessment for growing population, irrigation and industrial development, combining with geo-informatics and field data for hydrological research in Kalmykia, Russia. Various thematic layers wear used along with existing maps to prepare groundwater potential zone (GWPZ) map. Weights were assigned to all above factors according to their effectiveness, sensitivity and relevance to groundwater potentiality. Furthermore the resulting groundwater potential map has been cla...

Safe management of tailings storage facilities requires evaluation of embankment stability dams. In case of dams constructed by upstream method, special attention is drawn to evaluation of liquefaction potential. This requires evaluation of state of saturated, not compacted tailings material containing various amount of fines. Conventional methods based on static or dynamic sounding and standard sampling can?t assure required accuracy in determination of void ratio of deposited material. The paper presents results...

In order to increase the resource potential of the Volga-Ural oil and gas province, natural bitumen deposits have been commissioned in recent years. The pilot-industrial development of some near-surface bituminous deposits encountered numerous problems due to insufficient information on the hydrogeological conditions of the sites under study. In this paper, conditions of the groundwater deposits formation at natural bitumens deposits of the eastern side of the Melekess depression and the western slope of the South...

This article examines the conditions and prospects of technical water supply with a requirement of up to 20,000 m3/day of the soda ash production factory in the amount of 300,000 tons per year in Aralsk district (Zhalgizagash area) of the Kyzylorda region. The geographical position of the Aral Sea basin, the relief, the amount of precipitated water and the hydrographic network are described. Consumers of soda ash are also presented in this article. The construction of the soda ash production factory will have a si...

Mining exploitation in an underground mine is the main factor disturbing the balance within the rock mass. By removing the obtained raw material from the rock mass mining activity leads to changes in the broadly understood state of the natural environment. Extraction of the raw material ? hard coal with barren rocks is often associated with the need to undertake dewatering of the rock mass and discharging mine gases into the atmosphere. The process of extracting the raw material from the deposit and the accompanyi...

The paper presents the results of the research on contemporary permafrost dynamics associated with climate changes in Eastern Chukotka region (Chukotsky peninsula) and its impact on indigenous peoples? communities. The studies are based on the field monitoring works and geodetic measurements within several settlements as well as remote sensing data analysis and statistical results processing. The reasons of permafrost exogenous processes dynamics were indicated. The research was shown that the main threats for the...

The post-mining excavation "Piaseczno" is located in the south-eastern part of Poland, on the left bank of the Vistula River. After the extraction of sulfur and later sands in 1981, the pit remains in an unliquidated state. Its area is 167 ha, and the depth reaches 46.0 m. During the process of self-flooding of the excavation with water flowing in from the Neogene and Quaternary aquiferous, water level reached an ordinate of 138.0 m. This state has been maintained since 2012 by draining water from the created rese...

In this paper, a map zonation of landslide hazard and mass movements risks at the Goloord area (north of Iran), using Analysis Hierarchical Process (AHP) was performed based on the parameters of slope, slope direction, elevation, rivers, precipitation, faults, roads, geological unit and land usages. For optimization of the various parameters? effect that would lead to landslide occurrence, the effect dimensions of each of these layers were applied and the zonation of landslide risk in the region was mapped. The AH...

Kazakhstan is located in the arid zone in the conditions of water supply deficit. Irrigated cropping is the basis of agriculture for its southern regions. Akdalinsky irrigated massif (Almaty region, Kazakhstan) belongs to rice irrigation systems. Their exploitation causes the salinization and contamination of soils and groundwater. Mathematical modeling is the most effective method of solving hydrogeological problems associated with anthropogenic environmental impact. It is advisable to create permanent mathematic...

When it comes to efficient use of water, especially groundwater, a water / water heat pump is a very good example of its high efficiency at the optimal qualitative and quantitative conditions of the groundwater used. Hydrological and hydrogeological conditions on the territory of Slovakia is for several factors, mainly with the geological structure, location and clime. All this terms influence richness of surface, underground but also mineral water. The main objective of this article was based on knowledge of the ...

The authors of this article describe the suitability of using light dynamic penetration in the target area. The area of this survey was selected on the already reclaimed area, which, however, proved to be unstable. The main objective was to locate individual water-saturated horizons in the locality and, eventually, to determine the shear areas on which instability occurs. For this reason, several geodetically measured points were selected for dynamic penetration measurement. By this method, the water-saturated hor...

Lately, in our country, the necessity of expanding the transport infrastructure works has led to the necessity of designing and executing engineering constructions in areas with lands considered difficult in terms of physical and mechanical characteristics. According to the Romanian and European norms, sensitive clay of low consistency is included in the category of difficult land. This paper presents the main research stages of the physico-mechanical properties of sensitive clays found on a section of a highway i...

Various techniques for ground improvement are in use many decades to reduce the settlement of embankments and to accelerate the consolidation settlement of soft soil layers such as preloading, soil replacement, lime/cement stabilization, dynamic consolidation, vibro-stabilization, vertical drains, deep mixing methods or reinforced soil. Moreover, other more innovative solutions recently developed are also available, including natural and synthetic fibres or tyre powder penetration. Vertical drains, stone columns, ...

The main goal of compaction is decreasing the porosity of soils. Gravel columns belong to relatively new methods of improving the soil characteristics. Using them it is possible to expect to accelerate the consolidation of the subsoil, but also increasing the bearing capacity and decreasing the settlement of initially unadvisable soils. Because it was missing adequate research in this field, the design of gravel columns was based a long time on empirical experiences. Particularly based on foreign knowledge are pre...

This article presents the possibility of using computed tomography (CT) in geotechnical engineering including geocomposite testing. This technology enables dynamic, fast and non-destructive analysis of such properties as homogenization rate and porosity, and even the determination of the shear area angle of the samples, as well as it enables the understanding of the mechanisms of sample destruction. The conducted research confirms an exceptional suitability of the application of medical X-ray CT scanners for engin...

The article is concerned with underground and pit water hydrodynamic regime during Shumicha deposit Kizel coal basin storage underground treatment and after closure and inundation of self-titled mine. On the area of the deposit a heavy fissured-karst water level of Visean and Serpukhov stages carbonate deposits, fissured-stratal water complex of Visean stage coal-bearing series and fissured-stratal and fissured-karst water complex of Tourian stage of the lower carboniferous are developed. In vivo rivers Kosva and ...

Roads and highways provide a linear source of environmental (air, surface water, groundwater) pollution. This influence depends on the road class, the traffic intensity and the accompanying infrastructure. These factors are the basis for determining the groundwater vulnerability in the vicinity of roads. Road investments are intensively developing in the countries of Central and Eastern Europe, including Poland. 2350 km of new expressways and highways have been built in the period of 2005-2016 in Poland. According...

The main aim of the paper is to introduce theoretically developed curve which describes load settlement curve of the pile. A majority of European and US standards and recommendation indicates static pile load tests as a basic procedure to confirm bearing capacity of piles. The paper presents systematically made review of pile head settlement prediction methods, and static pile load test interpretation methods used in Europe, and United States. Using practical examples of static pile load test author indicates diff...

This paper presents a comparative analysis using Finite Element Method (F.E.M.) of the foundations with different shapes (cylindrical, truncated cone and hemispherical plate), placed on cohesionless soils with different compaction degrees. The comparison was performed function of the bearing capacity and of the states of stress and deformation that appear in the foundation ground for different load steps to which the foundations are subjected. The foundation systems studied in this paper consist in foundations rea...

Assessment of changes in hydrogeological conditions of groundwater deposits under climatic effect and human impact requires in-depth study. It especially concerns groundwater deposits of drinking quality. Providing drinking water to the population of large cities and most of the medium-size and small populated areas of Kazakhstan is based on these changes. The UN carries out special control and analysis of the state of drinking water supply to people around the world, which, unfortunately, testifies to the catastr...

This work will deal with the use of various geophysical methods for exploration of the sliding area and the determination of the interface between the layers in the sliding area at the Bohu?ovice Quarry. For this purpose, light dynamic penetration will be carried out, which is a dynamic penetration test that is used in-situ to determine the soil resistance of penetration cone. A constant dynamic impact is used to constrain the cone, which is due to the free fall of the ram with known weight and constant fall heigh...