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The article introduces systems theory in evaluating and forecasting environ-geotechnical hazards in the central area of Hanoi city. The advantage of the theory is that it includes all the conditional factors and causes of the hazards, as well as the relationship between the factors. The role of each factor is quantified and summarized by mathematical formulas, which can produce an accurate evaluation of hazards status and reliable forecast. The systems theory applied in evaluating and forecasting environ-geotechni...

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...

Tanks have been presently used for storage of various materials and products. It can be either a loose material, or various liquid and gaseous substances. Tanks have been often used to store the drinking water or various technical liquids, for purposes of waste water treatment, etc. Rectangular tanks are rarely used compared to cylindrical ones, but still they offer several benefits, e.g. higher resistance to unilateral loading and better use of space. The rectangular tank filled by water has been analyzed in this...

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 article is devoted to development of the mathematical models of transfer functions in complex geotechnical monitoring in the "geological environment - foundation - building" system. It is assumed that the geodynamic objects, as well as the seasonal natural geodynamic variations occurring near the building, have a direct effect on its physics-mechanical properties (changes in the stress-strain state of the beams, subsidence of the basement, redistribution of loads, and change in natural frequencies). In this re...

The article deals with numerical analysis of oedometer tests and high-rise building in conditions of Bratislava focused on time development of settlement. Numerical calculations are processed in finite element geotechnical software Plaxis. Oedometer tests was modelled in first step, with using six material models (Linear elastic, Mohr-Coulomb, Hardening Soil, Modified Cam Clay, Soft Soil, and Soft Soil Creep). Oedometer tests was realized on samples with four different moisture. There was achieved the effect of so...

The article discusses the features of formation and distribution of groundwater in the north-western slope of the Moscow artesian basin in the European part of Russia. Location of the north-western slope area is based on ecological-hydrogeological zoning. The aim of the case study is to examine the anthropogenic impact on groundwater resources and quality for two main aquifer systems of the Moscow artesian basin: Gdov aquifer and Intermorainal aquifer system. The investigation based on analysis of groundwater moni...

Lazy Bledowskie well field located in the area of the Upper Silesia, was established in 1959. It consisted of max. 22 wells abstracting water from the Triassic carbonate aquifer (Olkusz-Zawiercie major aquifer). This aquifer is additionally heavily drained by Zn-Pb ore mines. Due to the decreasing demand for water and the deterioration of its quality, wells were gradually excluded from operation and liquidated. Currently, only 2 wells are exploited, pumping approx. 11500 m3 /d. As a result of the overlapping impac...

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...

The method of accelerometric control of transport streams, which is part of the system of geotechnical monitoring, is considered. The main features of accelerometer sensors application in solving the identification problem of parameters of the transport stream are described. A mathematical model of the vibration load on local sections of the road is described. It is proposed to evaluate the effect of the transport load on the basis of the recorded parameters of the propagation of vibration effects arising from the...

Major infrastructure projects are nowadays benefiting on the remarkable IT structures which allows to use large datasets of the geotechnical parameters of interest and therefore to test different technical solutions, adapted to the site geology and local tectonic setting. Therefore is of major interest to have an improved knowledge upon the hazardous geological features, to evaluate them and to select among the possible technical solutions the most advantageous (in term of stability, strength and costs). In this s...

The internal arch of the Eastern Carpathians is a well-known area of mineral water occurrence. The combination of the post-volcanic phenomena, in terms of CO2 emissions (mofette) and water bearing layers lead to the formation of numerous mineral water springs with several locations where the mineral water bottling started more than 200 years ago. This study deals with the assessment of hydrogeological conditions, both hydrodynamic and hydrochemical, in such a particular area ? Lower Ciuc Basin. The main purpose of...

According to the globally sustainable trend line focused on the development or optimization of eco-innovative technologies or products to improve technical, environmental and economic performances of building materials, the necessity of experimental applications dealing with recycling and use of construction waste in geotechnical works has been addressed in various research studies. In this context, the present paper aims to configure soil compositions by mixing various types of construction wastes and enzymatic a...

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 Reactor Building NPP is a unique structure and has a complex nature of interaction with the soil foundation of various types. The complex nature of interaction is primarily due to the high load (approximately 0.6 MPa), behavior of the foundation slab as a fully rigid stamp, large load transmission area (6400 m2), and a long period of the building operation (at least 80 years). The main characteristic that describes interaction between the building and the soil foundation is the settlement whose maximum values ...

Modern tendency for cities development in suburb areas for civil, commercial, and industrial use is one of the reasons for constructions in territories that are not fully suitable for this purpose. It leads to changes in the stressed-strained state (SSS) of soil bases which may result from the damage or destruction of buildings constructed on the territory, that is significant financial and material losses in future. In order to determine the stability and reliability of different structures the term of their oper...

This paper deals with the evaluation of the hydrogeological hazard in the archaeological site of Castelseprio (northern Italy). Based on the geological, hydrogeological and geomorphological setting of the site, the failure modes and their causative factors were identified, and a proper conceptual model was reconstructed, identifying piping processes as the main phenomena ruling the slopes evolution and the landslides triggering. Afterwards, the hydrogeological hazard was assessed applying numerical modelling both ...

For one motorway project in Romania, the alignment has to cross an artificial lake that was made for drying a former swamp. The alternatives considered were crossing the lake with a bridge or with an embankment. According to the geotechnical investigations, the soil in the area consisted of soft saturated clays of 10-18m followed by marle. Crossing the lake with a bridge involved raising the vertical alignment of the motorway to nine meters above ground level in order to ensure the clearance for the maintenance of...

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...

In the parts of the mine where the exploitation is finished, noticed is surface deformation as a consequence of the surface subsidence. They may be extremely unfavorable because they cause activation of new geomorphogenetic processes. After the excavation was completed, in 2011 a geodetic survey was carried out above the excavation field OP Kp-I ("C" plate) of the pit Seoce, mining area "Haljini?i" in Kakanj coal mine. Subsidence caused by underground mining are almost always localized on the surface above the und...

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...

With climate changes, fortified steep slopes on the road infrastructure are suddenly aggravated by the sudden change in temperature and the rapid melting of accumulated snow. Increased water quantities cause surface and underground flows that turn the slopes into running earth and falling rock fragments. The drained earth mass and the rocks not only break the road bed, but also create a real threat to the safety of people and vehicles. The report, based on an example from practice, discusses aspects of some techni...

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 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...

The wind energy is a modern and efficient solution that uses the air flow through wind turbines to mechanically power generators for electric power production, being an alternative to burning fossil fuels. Wind power is renewable, widely distributed, produces no greenhouse gas emissions, consumes no water and uses small land areas. A wind turbine converts the kinetic energy of the wind into electrical energy. The electrical power generator and the steel upper structure of a wind turbine are equipments where were i...

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...

The Dobrudzha Coal Deposit is characterized by complex geological, tectonic and hydrogeological conditions. The formed aquifers and complexes, on the one hand, hinder the possible exploitation of the coal deposit, on the other hand they are important for drinking water supply in the area. The aim of the present study is to develop a 3D hydrodynamic model in the area of the deposit to elucidate the dynamics of the flow processes, the hydraulic connections between the different hydrogeological units and the possibil...

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...

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...

An important element in forecasting impact on groundwater of post-mining wastes used for open pit reclamation is the quantitative assessment of the absorptive capacity of deposited wastes (mainly Carboniferous rocks) and the volume of free rock debris as a zone more susceptible to mineral weathering and pollution leaching. These tests must be carried out simultaneously with the simulation on a laboratory scale of changes in the filtration coefficient of loose materials depending on the depth of the dumping ground ...

Angle of friction ?, cohesion c and undrained shear strength ?fu are the strength parameters that characterize the mechanical properties of soils. These parameters determine the bearing capacity of a cohesive subsoil. The value of strength parameters depends on many factors, e.g. soil type, consistency, stress state, stress history, loading type and loading mode. The paper presents the influence of plasticity index Ip on strength parameters in cohesive soils. To determine the dependence of strength parameters on t...

The purpose of this paper is to outline the findings of the study into the quality of water used for oil-field water injection operations to support the reservoir pressure. Comparative assessment of injection water quality at cluster pump stations has been carried out by means of a particle size distribution analyzer. The device was used to measure the particle size distribution in wastewater. Water samples from cluster pump stations located in the area producing oil from the Romashkinskoye oil field, Devonian for...

This report summarizes initial findings from a case study investigating the response of groundwater resources in the North of Crimea to intensive exploitation over recent years. There is the problem of increasing groundwater salinity. The aim of this study is to examine the response of groundwater in the area of the Isthmus of Perekop to current intensive abstraction, investigate groundwater recharge, and forecast possibility of future quality degradation. This territory was chosen as for the case study: hydrogeol...

The paper deals with geotechnical design and assessment of pile foundations of the steel arch bridge structure, which was built on the motorway D1 in the Jablonov ? Studenec locality in Slovakia. Bridge structure is founded in a very difficult foundation conditions created by flysch rock environment. The bridge structure is statically difficult. Therefore, it was necessary to proceed in accordance with the rules applicable to the 3rd Geotechnical category when designing and assessing the bridge structure. The resu...

The purpose of the present study, included in the research project SECOSUD Phase II, called ?Conservation and equitable use of biological diversity in the SADC region (Southern African Development Community) [1], is to describe the existing baseline situation in term of geological and hydrogeological conditions of the Kruger National Park, providing a starting point for understanding the water resources status quo, potential hydrogeological issues and concerns to assure a sound and correct water resources manageme...

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...

The development of dangerous hydrogeological processes takes place as a result of the action of climatic factors and of unfavourable technogenic conditions. One of the reasons of the worsening quality of land resources is the salination of soils by chemical compounds (chlorides, sulphides, carbonates) from ground and surface waters and the non-rational irrigation which results in worsening useful properties of soil. With the aim of decreasing or avoiding soils salination hydro-ameliorative measures are used which ...

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...

Submitted paper summarizes the existing knowledge and experience of the survey works and groundwater monitoring in the Slatinice waste dump. In the area of interest there are several hydrogeological collectors with different hydraulic parameters. Especially there are collectors of quaternary sediments, burned clays, weathered volcanic rocks and saturated contact layer between the dump and its subsoil. From the year 2013 an intensive hydrogeological survey is being carried out in the Slatinice waste dump and its su...

This article summarizes the findings of extensive hydrogeological mapping that has taken place over the past few years. The area of the CSA mine is situated at the northern edge in the central part of the Most Basin (North Bohemia, The Czech Republic). The area of interest is divided into several hydrogeological units, which are characterized by mutually different main determinants such as morphology, lithological characterization of the main types of rocks, tectonic violation. These are the following units: the c...

At present many new housing projects are being realized in Poland. They are often built in areas characterized by complex hydrogeological and geotechnical conditions. In such cases, the need to build deep excavations is complicated, especially when there is a high water table. The paper presents analysis of dewatering process of deep excavation of residential building. The excavation was carried out to the depth of 10 m below the ground surface. Due to the location of the investment near the river the water table ...

The purpose of the present paper is to analyse the behaviour of a flexible pile foundation versus a rigid one when submitted to lateral cyclic action coming from waves or wind, through numerical modelling using 3D finite elements. The comparison elements are: the maximum pile head displacement and the evolution of the maximum bending moment. The numerical modelling has been performed using the software CESAR-LCPC [1]. The study has been performed for 15 cycles, but the numerical model has also served to create som...

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...

The article deals with the prediction of deformation progress of the basement for a high-rise building founded in a deep foundation pit of 12.0 m below the ground level. Foundation consists of a stiff reinforcement concrete raft with basement in a Neogene layer of several ten metres. The deformation progress of the footing bottom is predicted by numerical approach of a finite-element method and the results are subsequently confronted with geotechnical monitoring. For this purpose, the input parameters were calibra...

The research deals with cyclic processes. The cyclic processes are those exogenous geomorphological processes which are characterized by the repeating sequence of changes. These processes include landslides, snow-slips, and some others where activation of the process is followed by the stage of its recovery, such as microrelief recovery, vegetation and soil cover recovery. The process occurs under the influence of two groups of factors: local factors independently activating separate sites (the local activation) a...