Browse

In this paper, we consider an algorithm for assessing the stability of a geotechnical system and its individual sections based on a basic model. As a basic model, it is proposed to use a set of models used at the design stage of sections of the geotechnical system. When assessing the stability of individual links of the geotechnical system, and the group stability of the analyzed area of the geotechnical system, the approaches of the theory of automatic control are used, taking into account bifurcation parameters ...

This paper presents a study on the stability of nineteen excavation slopes in metamorphic and carbonate rock masses along roads and urban areas in Central Portugal. The slopes studied are formed by phyllites intercalated by metagreywackes belonging to the Xisto-Grauvaquico Complex; quartzites and limestones of the Bussaco Ordovician-Silurian synclinal; schists of the Crystallophyllic Complex; and limestones and dolomites of Jurassic age. Road safety and urban areas are threatened by stability problems. In the asse...

The paper deals with an analysis of the settlement of a tank. The tank has a diameter of 18.6 m and a volume of 1760 m3. The subsoil consists of soft sandy clays and clays of low to medium plasticity. The tank has been founded on a slab of a thickness of 0.2 m. A consolidation layer of compacted gravel of a thickness of 1 m was created immediately below the foundation slab. The soft subsoil was improved using the stone columns. The stone columns were installed using vibro-replacement bottom feed technology. The st...

Landsliding is among the most massive and active exogenous processes. Now they increasingly manifest in permafrost zones due to climate change and require close attention and careful study. Analysis of the territory most prone to these processes, one of the largest islands in Northern Canada, Banks, confirmed earlier studies of landslide processes in this zone, which indicate a relationship between increased activation of landslides and abnormally warm summers. The study and assessment of the landslide focus param...

The aim of the research is to examine the geotechnical stability of the historical mining works for the Kamenny Vrch deposit with a high percentage of limestone, including examination of the geology of the mining works for the selection of a suitable deep mining method. A complete inspection of the mining works was performed to examine the geotechnical condition of the mining works. Convergence measurements were carried out to determine the stability of individual parts of the mine. Further, a geological descripti...

The study area is located in northern Bulgaria in the northwestern part of the town of Kozloduy, Vratsa province. From an engineering geological point of view, the region falls within the Lom Engineering Geological Area, which is characterized by the presence of loess sediments (silty clay sands and sandy clays), which are with high porosity, non compacted and susceptible to collaps?. Other dangerous engineering geological processes are landslides and river erosion. The Kozloduy lowland is one of the Danube lowlan...

The article deals with the geotechnical design and assessment of the foundation of a statically difficult bridge structure founded in complicated engineering geological conditions. Bridge structure No. 223 is part of the D3 motorway situated above the Hricov reservoir near the town of Zilina (Slovakia). The realized engineering geological survey showed that the geological composition of the subsoil is nonhomogeneous and complicated (occurrence of Quaternary soils and Mesozoic rocks). The physical and mechanical pr...

The paper deals with numerical analysis of the stability of an embankment reinforced using a geogrid. The analysis is mainly focused on the impact of the Rinter parameter, which represents the ratio of the soil-geogrid interface shear strength to the shear strength of the soil, on the deformations, and the global stability of the embankment. The properties of the soil-geogrid interface were measured using a modified large size direct shear test apparatus. The biaxial geogrid made of polypropylene with a tensile st...

The development of transport requires new transport routes. When designing and implementing them, we cannot avoid the construction of tunnels in our mountainous country. One part of the static design of the tunnel is the assessment of the structure on fire. The fire of cars in road tunnels can be modeled more and more accurately thanks to improving numerical models (CFD simulations, Fire Dynamics Simulator FDS [1]) as well as an extreme increase in computer performance. The results of these investigations are appl...

Expansion of the transport infrastructure of the Krasnodar Territory (Russia), in connection with the development of new land plots, as well as an increase in the tourist flow to the region, it became necessary to build facilities in difficult engineering and geological conditions on landslide slopes in hard-to-reach areas. As one of the measures to protect against landslide movements of surface rocks and to strengthen weakened sections of slopes, structures of bored piles, restrained in non-displaceable soils, ar...

The quality of agricultural products grown and collected at the facilities of the agro-industrial complex and the raw materials obtained for various industries largely depends on the ecological state of the geological environments. To quickly eliminate possible contamination, it is necessary to solve the problems of their early detection, localization and forecasting with the help of special technical means. In this aspect, it is promising to use groups of geoelectric control methods that allow to effectively regi...

At present, in time of sustainable environment, people views are increasingly focused on the energy performance of buildings. In recent years, there has been a huge increase in the rate of insulation of buildings. Thermal insulation of facades and roofs of buildings has been theoretically mastered and practically realized. Recently, we have also encountered thermal insulation of foundation structures to prevent heat leakage through massive concrete foundation structures into the subgrade. As clear from the availab...

The paper analyses in detail size of vertical deformation (settlement) for various loading states that may occur during construction and operation of Hydropower Plant (HPP) in Gabcikovo. During construction and operation of the HPP complicated loading states were applied onto sealing elements of underground tank and subsoil of the HPP foundation. Geotechnical calculations, a total of fourth load states modelled, taking into account significant changes in the stress state and deformation in the subsoil and on the s...

In Romania before 1990, over 600 hydro-power plants were built with dams and lateral dikes made of local materials. In order to be completed as soon as possible and with material savings, the protection screens were improperly executed. In many cases there is no continuous protection screen along the dam and in its vicinity, but only from place to place, intermittently. The same problem is with the lateral dikes of the lakes. In these conditions, at the hydroelectric power plant commissioning, the infiltration imm...

A mining tailings pond is an engineering construction used for the safe deposition of unexploitable mining waste from mining facilities. This contribution presents a stability analysis of a mining tailings pond. The credibility of the results, when considering the stability of a tailings pond, is conditioned by the aptness of the computing model of the tailings pond, which actually describes not only the constructional arrangement, but also the properties of the geomaterials of the construction of an tailings pond...

The processes of liquefaction of water-saturated soils under dynamic impacts are one of the many negative and destructive geological processes and phenomena that constitute the geological hazard in Bulgaria. Processes of liquefaction of water-saturated sediments on the territory of Bulgaria are registered during almost all strong earthquakes affecting its territory from both local and regional sources. Specific cases have been described by a number of authors. These processes lead to loss of bearing capacity of wa...