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The Dobsina dam is a part of the water management system ?Dobsina? which consists of the Palcmanska Masa reservoir, the Vlca Dolina hydroelectric power plant, and the Dobsina afterbay reservoir. Palcmanska Masa and Vlcia dolina dams were built in the years 1956 -1958, Dobsina dam in 1960. It is an earthfill dam, and the body of the dam is divided into the left and right part by a functional outlet block, which is situated in the valley alluvial plain. On the left side of the dam, the sealing was built of stabilize...

The study of erosion processes in settlements is a pressing issue since they develop rapidly sometimes. The purpose of this study is, however, to identify the dynamics of erosion activity in settlements of the Middle Ob region. The study objectives are focused on identification of hazardous areas, which is necessary for making informed decisions related to well-minded bank protection. The targets of the study were settlements of the Middle Ob region (Pasol, Vata, Vysoky Mys villages) within the latitudinal stream ...

The paper deals with the laboratory testing of the shear strength of the soil-geotextile interface. Two samples of soil were tested, i.e., coarse-grained poorly graded sand and fine poorly graded ash. The soils were reinforced using the Thrace WG80 black woven geotextile, which is suitable for road, railway, and geo-bag applications. The tests were executed using a large-size direct shear test apparatus. The shear strength of the interface was determined using the large-size direct shear test apparatus. The ground...

The paper deals with an analysis of an endless thin-walled beam on an elastic subsoil. Winkler's subsoil model has been used for modeling the subsoil. The analysis is presented in an analytical form for beams of infinite length. The analytical solution includes the analysis of both bending and torsion of the beam. In the solution of the bending of the beam, the effects of shear forces have been taken into account. For torsion analysis, an open cross-section has been considered, including the effect of cross-sectio...

Concrete constructions are normally reinforced with steel, which is protected by high alkalinity of the concrete against the effects of corrosion. The steel reinforcement corrosion is causing by the reducing the alkalinity of the concrete or by the presence of chlorides in such an aggressive environment which make reduction the cross-sectional area of the reinforcement and a loss of cohesion. Underground constructions are often found in an aggressive rock environment and the protection of steel reinforcement is mo...

The applied research focused on the stabilization process of unstable soils has pointed out the possibility of using different types of organic fibers and eco-friendly binders in terms of their effects on mechanical performance characteristics, cost savings and environmental impact. The experimental applications carried out under small-scale laboratory conditions aim to demonstrate the applicability and effectiveness of bio-composite wool-based products mixed with different binders in clayey stabilization works or...

The locality on the Hron River close to the town of Banska Bystrica (Slovakia) was selected, based on the study of effectiveness of the hydro-energetic potential of the Slovak Republic and on the engineering-geological survey, for the construction of a small hydropower plant in Salkova. In the process of the environmental impact assessment, it was required to determine the impact of the proposed hydraulic structure on the surface and groundwater level regime of the adjacent area. Therefore, the 3-D mathematical mo...

The determination of the physical and mechanical parameters and properties of the soil is an important part of the design of geotechnical structures. The soil characteristics can be specified by laboratory or field testing. In Slovakia, one of the common field tests, used for determination of the soil characteristics during the engineering geological investigation, is the dynamic penetration test. In 20th century, the dynamic penetration test passed through substantial development and simultaneously, the correlati...

Stone columns are one of the most-used technologies of soil improvement in Slovakia. The stone columns installed using the vibro-replacement technology cause the change in the stress state and the properties of the surrounding soil. These changes are often not taken into account in the design. The paper deals with determine the change of the stress state and oedometer modulus in the soil around a single stone column. The calculations have been prepared in the form of a parametric study. The selected properties of ...

The presented article is devoted to the development of equivalent models of geological environments based on the grid method, taking into account possible oil pollution resulting from emergencies at oil storage and oil refining facilities and amounting to about 25% of the total share of leaks, as a result of which an average of 2% to 10% of extracted raw materials is lost annually in the world. The main sources of emergencies at oil storage and oil refining facilities are examined, and it is shown that their resul...

The problems of potable quality groundwater pollution have now become one of the most important on the Earth. According to UN, about 2 billion people currently lack access to drinking water. Climatic change and increased negative impact of anthropogenic factors significantly affected the quality of water resources. Groundwater is the main source for drinking and other domestic purposes. Many developing regions of the world suffer from shortage of safe drinking water. Basically, the main reason is that due to globa...

The effective application of the evils in the construction, including road, an important area of research is to identify the characteristics of physical and chemical processes and their hydration mechanism composed gold-cement binders. By chemical, mineralogical, derivatographic, spectroscopic and X-ray analyzes established physico-chemical properties of fly ash of thermal power hydroremoval Rudnenskiy AO SSGPO (Kazakhstan). It was determined that the hydraulic ash is acidic, with a high content of SiO2 and Al2O3 ...

This paper presents a theoretical study on the free convection of pore water in saturated permeable rock mass during artificial freezing. Artificial freezing technology is widely used in the construction of mine shafts, tunnels and other types of excavation that take place under high water content conditions or conditions of high levels of groundwater seepage in soil and rock. A qualitative analysis of artificial freezing in water-saturated permeable rock mass shows that the effect of free convection can be signif...

This article is devoted to the problem of organizing geo-ecological monitoring of water supply for territories with conditions of active karst processes. In these cases, the task is complicated by the difficult hydrogeological conditions of the locality and the high vulnerability of karst groundwater resources to pollution due to their complex hydrogeological structure. Karst water exchange systems are characterized by high natural and anthropogenic vulnerability of groundwater resources, and their extremely low a...

Creation of information system of the Republic of Kazakhstan groundwater resources and reserves implies the accumulation, systematization, processing and analysis of historical and operating data about status and use of groundwater and environmental bodies related to it. The system includes different-scale geoinformational models. Each model is built on the basis of materials contained in bases of semantic and graphical data. Semantic database contains structured text and numerical information. Spatial data are in...

The study area is located in northeastern Bulgaria (Northern Bulgarian Black Sea Coast), between the Ikantalaka locality, Balchik municipality and the village of Bozhurets, Kavarna Municipality, Dobrich district. From an engineering geological point of view, the region falls within the Balchik Landslide Area, which is characterized by old and recent landslides with linear-stepped and packaged construction. In the formation of landslide processes in the study area, the direction of subsidence and the angle of incli...

Groundwater in the territory of Kazakhstan is present in very diverse hydrogeological conditions and is subject to powerful human impact. First of all, it is manifested in groundwater pollution. Basic sources of groundwater pollution are gaseous, liquid and solid substances and production wastes of mining and gas and oil producing complexes industrial enterprises, agricultural facilities, cities and large population centers, large dumps of production, domestic and radioactive wastes etc. They cause habitat degrada...

The region in question is located in northeastern Bulgaria, 2.8 km southeast of the village of Balgarevo, Kavarna municipality, in the protected picturesque area "Zelenka". The study area is part of a coastal zone with a length of 2.5-3.0 km, where several descending springs are established. During the mapping in September 2018 in the studied area a zone of groundwater discharge was established in the slope at an absolute elevation of 36 m. Water from this area flows down the slope, forming a scenic waterfall. The...

In the article is analyzed the influence of relative stiffness and bonding of the "foundation -subsoil" interaction system on the value and distribution of the vertical normal and shearcontact stresses. The analysis of the calculated deformations of the foundation focused onthe qualitative and quantitative evaluation of the non-uniform settlement, respectively therelative deflection and flexibility of the foundation. In terms of relative stiffness areanalyzed the shallow square foundations from the "perfect rigid?...

In the article is analyzed the influence of relative stiffness and bonding of the "foundation -subsoil" interaction system on the value and distribution of the vertical normal and shearcontact stresses. The analysis of the calculated deformations of the foundation focused onthe qualitative and quantitative evaluation of the non-uniform settlement, respectively therelative deflection and flexibility of the foundation. In terms of relative stiffness areanalyzed the shallow strip foundations from the "perfect rigid? ...

Currently, geotechnical monitoring systems are used to solve the problems of protecting the life-supporting and technical objects from possible catastrophic scenarios during the life cycle of objects as a whole. They allow us to assess geomechanical changes in the geological environment, as well as to carry out technological control of buildings and structures in order to form a predictive assessment of the possibility of man-made disasters. It is determined that the main problem of emergency situations on technic...

A serious challenge for the construction of Sofia Metro is the shallow groundwater and the high water abundance of the hydrogeological units that are crossed by the construction route. The dewatering of the excavations for the facilities that are supported on deep foundations and the tunnels is most often associated with large and long-lasting local depressions of the water table. The joint action of the drainage systems around the metro stations and tunnel sections built simultaneously or in overlapping time inte...

Human impact along with other elements of the environment has a great impact on the processes in the river basins. River meander dynamics and mobility are important indicators of environmental change related to climate changes and anthropogenic activities at local and river basin scales. This paper presents a study of spatial and temporal changes meandering Alazani (Georgia) in its middle stream and downstream. Alazani is the border of the country and the bank erosion here has the environmental and political impor...

Floods are one of the most frequent natural disasters in Slovakia. The suggestions of flood protection measures were already taken by our ancestors many centuries ago. During the recent years, the attention of public and professionals, as a result of floods in Slovakia, is markedly focused on the possibilities for effective protection against the harmful effects of this negative natural phenomenon. One of the flood protection measures to protect towns and villages, or other important buildings, is a realization of...

The problem of supplying drinking water to population of Mangisstau and West-Kazakhstan regions is especially sensitive as the region is located in semidesert zone, water resources are limited. Development of the region natural resources, creation of sufficient conditions for economy intensive development requires large quantities of quality water. Worsening of sanitation-and-epidemiological situation, unsatisfactory technical state of water-supply systems, as well as gradual contamination and salinity of water so...

The paper deals with the problem of avoiding karst and suffosion development upon projecting engineering structures in the areas of covered karst. It is shown that in case the depth of subsurface part of buildings with deep-seated foundations may be varied depending on the geological structure, the choice of foundation depth should be aimed at preventing possible karst and suffusion development. This approach is exemplified by the case of Bol?shoi Theater building reconstruction in the center of Moscow. A well-gro...

The paper considers the causes of freshwater scarcity and its worsening, and gives recommendations for the prevention, remediation and mitigation of climate change negative effects on groundwater. Wet technology sectors have been developed rapidly in the global market. Currently, there is already a clear increase in freshwater scarcity. According to the UN, over 1.2 billion people live under constant growth of freshwater scarcity, and FAO predicts that the number of those living in water scarcity conditions will e...

Soil unit weight is one of the most important parameter used in all geotechnical calculus related to design process of any type of constructions. Determination of this gravimetric -volumetric data can be done through laboratory tests in firm soils, or indirectly as itderive from some in situ investigations such as Cone Penetrations Test (CPT) or as severalgeophysical investigations such as Down hole, Cross hole, Logging P-S velocities, insoils which can?t support undisturbed samples (very wet organic soils or sand...

The article presents the results of georadar-sensing (GRL-sounding) of the therapeutic mud manifestation site of Arasan-Kunduzdy litter located in the Panfilov district of Almaty region on the right bank of the former riverbed of Ili (oxbow), 45 km south-west of the city of Zharkent, in order to determine the power mud deposits and the study of its lithological structure. GRL- sounding was done using GPR OKO-2 AB-400 antenna unit. It was made 4 profiles on the north bank of litter (profile 1 - 150 m, profile 2 - 1...

A characteristic feature of streams in the East Slovakian lowland is their considerable fluctuation. On the one hand, this causes dry periods in streams, on the other hand, with periods extremely rich in precipitation - flood periods. One of the most important streams in this area is the Ondava River. One of the essential elements in the protection of the area against floods are hydrotechnical structures along the streams ? flood control levees. In terms of construction and also with their parameters, they belong ...

When developing oil fields, water flooding is often used to displace oil. In this case, effective oil production is possible with a detailed study of hydrodynamics in the reservoir. Recently, organic phosphors have been used for these purposes, which are pumped into the formation through injection wells. The spectral characteristics of the excitation (absorption) and luminescence of produced water with phosphors can provide information on the hydrodynamic relationship between injection and producing wells and the ...

The aim of the work is to create methodological provisions to justify the safe parameters of the thermal regime in permafrost rocks during the construction of underground complexes of small power nuclear plants in the Arctic region. The idea of the study is to assess the thermal regime of long-span mining excavations using mathematical modeling methods. To ensure the stability of underground mine excavations at the construction stage in the permafrost, the authors verify the use of various heat-protective systems....

Rockfalls are very common in Romania and represent a severe threat due to their high propagation velocity that, independently from the volumes involved, can be extremely dangerous to people and any civil engineering works like dams, roads, and adjacent buildings. Therefore, it is necessary to preliminary identify those areas most prone to this type of process to pursue territorial planning with an awareness of hazards and risks [1]. Tarnita Dam is located in Cluj County, on the left bank of Tarnita Lake/ Reservoir...

The identification of the landslide preparation and development mechanisms is the key to the sustainable development of landslide and landslide-prone urban and mining areas. The understanding of the landslide preparation mechanism is necessary for landslide hazard and risk assessments and designing proper protection measures and monitoring. A new equation for calculation of a slip surface depth (of a landslide basis) was obtained, using slope morphological and soil strength parameters. A new elaborated approach fo...

Fibre-reinforcing is an efficient method to improve the mechanical properties of a wide range of materials including soils. A drawback of currently used fibres, given by methods of production, is their uniform cross-section, planar shape and a smooth surface in most cases having an adverse effect on the pull-out capacity of fibres. The proposed paper presents an initial experience with the fabrication of fibres and testing of cohesionless soils improved in this way. The commercially available 3D printer was used a...