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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...

Electric discharge technology (EDT) has ample opportunities in the field of geotechnical construction. It has a number of technological advantages. EDT bored piles have increased bearing capacity both for the soil and for the material due to the maximum inclusion of the surrounding soil in the combined action. Unlike other types of piles, the cross section of an EDT pile has additional areas of cementation and compaction. Due to these areas, specific bearing capacity for the soil of these piles exceeds the bearing...

Natural sand resources in Vietnam have been nearly exhausted and its price has been increasingly escalating. According to estimation, by 2020 Vietnam will not be able to provide enough sand for construction industry. Alternative materials for natural sand are now encouraged by the authorities. Therefore, this article focuses on researching the possibility of using GBFS as an alternative for natural sand in aggregate for concrete. Based on the previous studies and suggestions given by domestic and international res...

Research has been conducted on the permafrost in the Sentsa River valley for the first time. The investigated units of the permafrost are cryogenic structures of unconsolidated deposits and active layer temperature, morphology and cross-section of sizable frost mounds and chemical composition of ice core. The complex pilot studies included borehole drilling, detailed documentation of frost borehole samples, penetrated sections of frost mounds, and river terrace cusps, tachometric survey of the Sentsa river valley,...

The technology of Permeable Reactive Barriers in recent years is one of the most frequently developed methods of protecting the soil and water environment from pollution. These are zones filled with reactive material, in which during the flow of contaminated groundwater, contaminants are immobilized and/or their concentration is reduced to the limit values. Currently, there are relatively few deep installations compared to shallow systems (e.g. <10 m), resulting mainly from higher costs and technical difficulties ...

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...

When new constructions are performed near existing tunnels, emergency situations are often reached. Emergencies affect both the safety of the old tunnel and the stability of the natural environment. Emergency state parameters are examined for the causes of this degree of uncertainty. On the basis of an example from the practice, technical guidelines and measures are proposed to overcome the accidents and to permanently restore the security of the existing tunnels and sites affected by the new construction. Recomme...

Significant parts of important aquifers in Bulgaria are affected by the long-term in-situ leaching of uranium, using acid in borehole systems with reinjection. This is the case with the Momino uranium deposit formed in the lower part of the Neogene-Quaternary sedimentary complex, filling the Thracian depression. In this complex is formed one of the main sources of water supply in this part of the country. In order to assess the actual status and to predict the future changes in the quality and composition of the g...

The creation of footings and foundations with an increased load capacity is a crucial task of modern geotechnical construction. Among all the existing technologies pertinent to the construction of such foundations, underground structures, such as bored piles of large diameters, are most strongly sought-for. The existing construction technologies, in which such piles are used, make it possible to realize substantial values of load capacity (Fd). This parameter may be increased just via changing the length and diame...

The geo fluid mechanical model of the natural and technical system "the store-the protecting construction-the geological basis" which in the program PLAXIS complex has been realized in a computer 3D model has been developed for a research and assessment of reliability of the store of liquid industrial wastes. For each component of model it was set, taking into account basic data, the corresponding mechanism of deformation: elastic-plastic, elastic and viscous-plastic, filtration consolidation. As the changing infl...

From the glacial deposits moraines are the most heterogeneous and complex. Moraine - complex bodies, consisting of fragments, previously carried along by a glacier and normally consist of somewhat rounded particles ranging in size from large boulders to minute glacial flour. The article studies the difference in moraine composition in Central Karelia and the Murmansk region. The complexity of moraine development with the help of construction equipment for the purposes of road construction is considered. The first ...

The paper focuses on seal defect of dam system of an impoundment with deposition of calcareous sludge. The seal defect of the impoundment dam system, consisting of a homogeneous ground dam, occurred due to its underflow by desludged water. This paper lists causes of the underflow at the dam system, based on analysis of the original engineering-geologic survey, construction method of the dam body, floating method at the impoundment and additional engineering-geologic survey. The primary cause of the defect is prese...

The article devoted to issues of organization of regime observations in the system of geodynamic karstological monitoring, which is carried out with the active development of karst or karst-suffusion processes with a high degree of danger for the construction. It is noted that for stationary observations it is necessary to provide quantitative characteristics of changes in individual components of the geological environment in time and space that must be sufficient to assess and predict the development of the kars...

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, ...

Stone columns are one of the most used technologies of soil improvement in Slovakia. An impact of improvement depends on properties of original subsoil as well as properties of coarse - grained materials used for stone columns. Stone columns can be made of pebble gravels, crushed pebble gravels or quarry stones. Two different types (sizes) of quarry stone were used on two different building sites in similar engineering - geological conditions. There wasn?t direct comparison of both materials. The properties of use...

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...

The results of stable isotopes 37Cl and 81Br research in ground brines of sedimentary and intrusive rocks are presented in this paper. More than 60 ground water samples from wells and boreholes throughout the Siberian Platform have been analyzed by the method of Isotope Ratio Mass Spectrometry (IRMS). There are some differences of geological and hydrogeological sections between northern and southern parts of the Platform. The ground brines in northern part of the Platform have exclusively Cl composition with Ca or...

Strengthening a weak soil foundation is a contemporary problem in engineering geology and geotechnical investigations. Such strengthening can be achieved, among others, through the use of different types of geosynthetics. They improve the mechanical parameters of the reinforced layers, increasing the load bearing capacity and extending the durability of geotechnical structures. Such solutions are commonly used to strengthen a weak subgrade in transport investments and civil engineering. This paper presents structu...

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 devoted in the short history of formation of landscape in Moscow Meshchyora National park, its modern using of resource and perspectives of possibility of restoration. The territory of the Moscow Meshchyora National park locates on the flexure of the crystalline foundation of Russian platform of Moscow syneclise. The Jurassic clay, sand, silts (thick massive 20-40 m), has been made up sediments, which were formed the conditions of the warm sea. The Pleistocene glaciers occupied the North territories...

The foundation of buildings is one of the basic tools of a landscape design. In the interests of today's society is to use abandoned areas, buildings, industrial sites also known as brownfields are used for re-use and to prevent the creation of new territories, for the purpose of foundation engineering. In these cases, it is important to know not only the overall character of the solution site but also the geological subsoil, which significantly influences the proposed building - technical solution. For this reaso...

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...

Tunnel excavation in mountainous or sloping regions can reactivate or accelerate landslide phenomena. On its turn, tunnel excavation can be affected if it crosses weak rocks in landslide-prone areas. In the present study the interaction between tunnelling and slope stability is analysed in presence of Deep-Seated Gravitational Slope Deformation (DSGSD). At this aim a case study is considered, located in northern Italy (Central Alps), where a landslide has been reactivated along the border of a wide DSGSD, close to...

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...

Analysis of the variability of the density distribution of joints within karsting dislocated rock formations helped to highlight the heterogeneity of the structure of massif on different levels and to predict development areas of karst, karst-erosion, disjunctive forms according to the degree of fragmentation of rocks. As an example, the results of the graphical interpretation the data of tectonic joints fixation in the layer of carbonate rocks within the West Ural zone of folding (Russia). The distances between t...

In article, the methodology for organizing data collection from sensors of a multi-pole electrical installation intended for geoecological monitoring of coastal zones of karst lakes in the areas of hydrological discharge of the lake is considered. The study of the hydrogeological features of karst lakes is an important task of practical geoecology. Karst lakes have a significant impact on the development of destructive karst-suffusion processes, both locally and regionally level. For monitoring it is proposed to u...

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...

Modeling and calculations of the reinforced soil displacements are a current problem in engineering geology and geotechnical investments. One of the forms of soil reinforcement is the use of geocell systems. Geosynthetics increase the strength of weak subgrade by insertion stiffness for tension and extending the durability of geotechnical structures. Geocell systems are often used in transport infrastructure, for example for reinforcing the subgrade of railway lines. This paper presents the results of finite eleme...

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...

Study of the hydrogeological responses during seismic waves' passage let us to take insight on hydrogeological and tectonic processes inside the Earth and their interactions as well. Earthquakes may cause both postseismic and coseismic changes of the water level. As a rule, static postseismic hydrogeological responses are typical for the near field of earthquakes, whereas dynamical postseismic or/and coseismic changes correspond to the far field. However, the exact parameters responsible for the water level respon...

The study of sediment transport in the coastal zone under the influence of waves and currents makes it possible to predict changes in the ecosystem of the coastal zone under various hydrometeorological conditions and anthropogenic influences. River runoff and abrasion processes are one of the main sources of solid matter entering the coastal zone, as well as one of the factors determining the changes in the granulometric composition of bottom sediments. Since the rivers of the Western Crimea are heavily regulated,...

пїЅBody of groundwaterпїЅ means a distinct volume of groundwater within an aquifer or aquifers. This paper has as main objective creating a three-dimensional lithological model using borehole data for ROIL16 пїЅ Plain Vlasia groundwater body. RockWorks 15 is a software package for geological data management and visualization and it was chosen for analysing sub-surface data. The initial characterisation requires the collection of detailed information and data, such as geological and hydrogeological characteristics,...

In late January of 2016 (27/01/2016) at Mining Section 14 (Block 7/10) of the Kukisvumchorr flank of the Kirovsk Mine (Khibiny), a violent seismo-dynamic event (lgE ? 8.11) took place to induce significant destructions and deformations of workings at Drill & haulage horizon 4 (4DHH) with an average elevation of +236 meter, 1DHH (+183 m), and possibly at 2DHH (+209 m), which is unavailable for examination. The dislocations, deformations and roof break formation occurred both at the cross-measure (predominantly) and...

The irregularity of rock joints in rocky terrains contributes considerably to better mechanical stability of these terrains. The assessment of the stage of surface irregularities (asperities) of jointed surfaces in rock massifs plays an important role when shear strength of rock joints are evaluated. For this purpose it is necessary to analyze morphology of surface reliefs of rock joints. The digital replicas of surface reliefs are ideal tools for such a morphology analysis. This paper describes a new method for d...

Joints in rocky massifs usually form a space network that is hidden under the surface of terrains. Although normally invisible, same parts of such networks may emerge when excavation work is running in terrains. The irregularity of joint rock surfaces are characterized by joint rock coefficients that serve for computations of shear strength of these joints. This is important for evaluation of the mechanical stability not only the rock joints themselves but also for the mechanical stability of rock massifs that are...

The reliability of forecasted long-term peat settlement under embankment is primarily determined not by the soil models used, but by the specific features of peat laboratory testing. This article presents the results of oedometer tests of various-height peat samples with squeezing of pore water towards only top or top and bottom faces. The load was applied to the samples in two ways: by gradual stepwise increase or all at once. The stabilization condition for each load was sample deformation not exceeding 0.01 mm ...

In the formation of the well under the influence of an axial load and speed core drilling shell is curved, with its lower bottomhole part consists of elements of different stiffness: a set of core and drill pipe. The researches allowed to formulate a number of conclusions. To determine the length of the half-wave in this part of the technological tools used energy method, according to which the whole work of external forces on the length of said potential energy goes into twisted drill. The half-wave length decrea...

Construction and Demolition (C&D) materials which consists mostly of concrete debris were deposited on landfills. The development of road network results in an increasing demand for building aggregates which are part of the road construction unbound subbase. For decrease of investment costs and prevention of spoiling natural resources, the C&D materials, such as fly ash, steel slag or recycled concrete aggregates (RCA), were applied as a subbase mix. Among many properties influencing the quality of road material, ...

Geotechnical monitoring aspects of construction activities in congested urban environment are discussed. Successful application of express methods, enabling mobile equipment use for soil tests is described. Case histories of such applications in Moscow historical downtown are given. Data, obtained by such monitoring, is analyzed, and a conclusion is drawn on the necessity to apply sparing technologies when construction operations are carried out in the vicinity of buildings in service. Development and redevelopmen...

Recycled Concrete Aggregate is a material resulting from the crushing of concrete elements. Currently, as a result of increased demand for natural aggregates, artificial aggregates are sought as an alternative materials in civil engineering activities. Recycled Concrete Aggregate characterizes high strength, but some properties, both mechanical and physical, remains unclear, which often discourages engineers to use this material. The paper presents the results of the California Bearing Ratio (CBR) and cyclic CBR (...

Intensive development of industry and urbanization have led to the increase of the waste water amount that pollute water flows. On the contrary, the need for water of satisfying quality continuously grows. The paper industry is one of those branches that are characterized by very high water demand and big amount of polluted waste water. In the meantime ensuring adequate quantity and quality of water is one of the most important goal of water resources management in paper industry. Water demand can be covered from ...

This work is aimed at investigating the carbonate collector micro-jointing using the results of the precision underground water level monitoring at the Mikhnevo Geophysical Observatory (пїЅMikhnevoпїЅ GPO). For a long period of hydrogeological observations from August 2013 to December 2016 a database of local mini-cones recorded in the observation well was formed. The leading factors that influence the process of the level recovery of mini-cones based on the systematization and generalization of selected mini-cone...

A large number of structural damages reported during the past decades around the world associated with a high geotechnical risk have highlighted the major attention that should be given to the expansive soil category in engineering practice. For avoiding or mitigating the effects of clay expansiveness on civil engineering structures before construction, the identification of soil parameters related to swelling behavior is considered essential in solving geotechnical engineering problems. This paper aims to analyze...