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In heavily settled areas, deformations i nduced by the tunnel excavation may cause serious damage to nearby structures. Theref ore, it is necessary to study effective means of controlling tunnel induced deformations. Th e main parameters affecting the failure and deformation state of the soil around a circular underground opening are the physical characteristics of the soil, the diameter of the opening, and the support pressure. In this study, 3-Dimensional (3D) FDM analyses were conducted to assess tunneling indu...

The engineering behavior of rock materials depends not only on stress state and stress history but also on the physical and chemical change of the rock materials due to weathering. Changes in index properties such as dry density void ratio, clay content and seismic velocity caused by weathering processes is representing strength and elastic properties of rock materials. The changes caused by weathering processes in rock material may be mainly considered under th e two topics; the mineralogical change and the physi...

The dynamic tests of reinforced concrete road bridge on the modern highway E-75 at the Kumanovo-Veles section has been carried out. The bridge is a prefabricated system of pre-stressed simple beams connected by the road deck cast in situ. The foundations were bedded in the stratum of shale. Under six of the columns the footings, that is, foundations, are the ordinary cascade ones, while three columns are founded on caissons, that is boxes in the very PДЌinja riverbed, nearby Katlanovo village . For the purpose of ...

Many different methods for calculation of the settlement of shallow foundations on coarse soil is used in engineering practice. In all these methods, the greatest impact on the calculated settlements have applied loads, adopted values of soil parameters and foundation width. It is common that in thes e calculations adopt soil bearing capacity that is significantly lower than actual, so the calculate d settlement of the soil is significantly larger than the actual, which results in a conservative foundation design....

Remote sensing is a useful tool for a ssessing, monitoring and conservation of groundwater with advantages of spatial and te mporal availability of data from the large and inaccessible areas. Hydroge ological characteristics of a region are derived by surface indicators-geological features, geomorphology, hydrology, vegetation, land use. The paper deals with geological element as a factor influencing the hydrological and hydrogeological processes in the basin and adjacent areas Dambovicioara. Complexity of data pr...

Within the NATO Science for Peace Project 981882 “Site-effect analyses for the earthquake-endangered metropolis Bucharest, Romania” we obtain a unique, homogeneous dataset of seismic, soil-mechanic and elasto-dynamic parameters. Ten 50 m deep boreholes are drilled in the metropolitan area of Bucharest in order to obtain cores for dynamic tests and vertical seismic profiles for an updated microzonation map related to earthquake wave amplification. The boreholes are placed near former or existing seismic station...

For mining support made of monolithic conc rete required additional application of solutions to improve the stre ngth characteristics. These solutions lead to high lift bearing capacity of the mining support conc rete. The transmission coefficients method is a method of computing tasks of monolithic c oncrete support, support that come in the contact with the massive rock. By the method of transmission coefficients of the tasks are taken into account various types of actions, namely the action given by the weight ...

Often manufacturing and preparation of samp les for geomechanical characterization is expensive and time-consuming and energy, and estimate various properties can be made by using empirical correlations. As part of the geomechanical characteristics of rocks are closely linked, can achieve a quantit ative and qualitative an alysis using the correlation functional relationships that can exist between physical properties, strength and deformation. Correlation between rock properties relationships have been establishe...

Contribution mentions reasons for rising of rusting and incrustation and possibilities of its removing at the technological equipments during using of hot geothermal water. Biggest attention is given to the choice of me thods for treatment with geothermal water, either by chemical or by physical way and further attention is given to the geothermal energetic system and its parts that are subjected to the rusting and incrustation.

The definitions of the risk factors due to a possible earthquake on the settlement area are useful for decreasing hazard of a potential earthquake and essential for preparing the management plans by the local municipalit ies and government. Soil amplification, vulnerability of buildings, natural period of soils and liquefaction are the main risk factors of a possible earthquake. On the othe r hand, before definitions of these risk factors, the distribution of the soil classe s should be determined. By the way, the...

Increasing population, urban development, i ndustrial and agricultural needs, gradually warming the Earth and increasing droughts have been caused of reduction of consumable water and the need for rich resources of underground water has been more than before. Arak as a fourth pole of the industry in the Iran country has especial dependence on Aman Abad region underground water resources, so the study in this area for underground water exploitation and control of resources have great importance , that most of these...

In Poland the closed shafts were filled up in the past years with th e rock material with very different backgrounds and properties. The effect of flooding the shallow, old mining areas, as well as the impact of water infiltrating from the surface, are observed on the surface as subsidence funnel and discontinuous crack. Using the geophysical surveys, numerical modeling, geologic al and hydrogeologi cal studied, some possibilities for diagnosis of hazards in abandoned coal mines areas are shown. In the context of ...

Weathearability and/or the performance of the building stones in service are depend heavily on mineralogical composition, fabric, especially micro-fissure properties, and weathering state of rocks material. When cons idering the definition of the k-value, it is possible to say that the k-value can be used for characterizing the weathering state and weatherability of a rock. As decomposition of a mineral result in the formation of new minerals with lower k- value, the k-value of whole rocks is generally regarded as...

Rock mass deformation modulus is an im portant input parameter in any stability analysis in the surface and underground structures. This parameter can be obtained through in-situ tests, empirical relations be tween deformation modulus and rock mass classification, and estimating from back analysis method. Field tests are developed to determine this parameter directly, but these methods are time consuming and expensive. Therefore, some researchers have proposed empirical formula for estimation of rock mass modulus ...

Hygienic problems and the protection of property against floods have been successfully solved by existing concepts of drainage. However, the way of urban drainage has led to intensification of urbanization impact on hydrological regime of the country. Technologically, environmentally and economically purposeful urban drainage prevents rapid runoff of waste water. New concept s upports such way which resembles natural way of drainage in unstopped floods and which reduces negative consequences of country urbanizatio...

In the analysis of geotechnical engineeri ng problems, limit equilibrium methods are often engaged to analyze the forces and model the problem. On the other hand, the rapid development of computing technology has e quipped a large number of methods to be employed in engineering problems, as well as geotechnical issues. These enhancement consequences the popularity of analytical limit equilibrium methods based on computer aid process. Finding the most critical slip surface is a ch allenging global optimization prob...

The paper summarizes the results of assessme nt of geo mechanical characteristics of rock samples collected from the Sibiu C ounty: Valea StrГўmbului-Rasinari and Valea Marajdia. The rock characteristics are infl uenced by climate factors, in particular temperature and humidity. When the phenomenon of frost occurs, rock stretches and some strains are acting that lead to a deterioration of the structure and internal stability, thereby reducing the characteristics of resistance and strength. Within this scope, sever...

Region of West Carpathians Mountains is the territory, where app. 5.25% of total area of coverage are landslides. Therefore our re search team has started implementation of TDR technology (Time Domain Reflectometry) for measurement of slope underground movements. However this technology offers implementation for a variety of uses. Continuing development of monitoring usin g this method of measurement has been implemented in one selected locality where new national road was built across the existing landslide. In t...

Centuries-long exploitation of rock salt from Tuzla salt deposit has produced significant deformation of the ground surface and buildings in the town of Tuzla. The southern edge of the deposit dips beneath the northern part of the town. Although relatively small size, the deposit represents an extremely complex geological body The slow, natural processes of dissolution of the deposit's eastern part were accelerated by industrial exploitation of saline water (bri ne) that lasted over 100 years. Exploitation of the ...

Municipality of Kikinda spatially belongs to the northern part of Banat, Autonomous Province of Vojvodina and covers an area of 782 km 2. The water supply system uses groundwater wells which capture water from deep aquifer at a depth of about 200 meters and consists of central city water source and water sources from surrounding local communities. City’s central water supply system contains 14 wells, divided in several water sources which are: "Šumice", "Toza Marković", “Jezero” and “Masarikova”. The t...

Cihanbeyli basin is located in the northern part of Konya in the Central Anatolia, Turkey. This wetland is characterized with four lakes (Salt Lake, Bolluk Lake, Tersakan Lake and Gök Lake). The Salt Lake, Tersakan Lake and Bolluk Lake are so important because of its contribution to country ec onomy and enabling ecosystem services for endangered bird species. In recent years, The Salt, Tersakan and Bolluk Lakes are in danger of completely drying. The main reasons of drying of the lakes are global warming, the lac...

The presented paper brings results of a case study implementing the geofactors of flood land and radon hazard into land use plans in the cadastral district of Doubrava and Karvina. The studied area is located in the Ostrava-Karvina Coal District in the north- east of the Czech Republic close to the Polish border. It is defined by the map sheet 15- 44-03 in 1:10 000 scale. The area was studied for the fact how land use planners catered for the distribution of flood land characte rised by the hundred-year flood and ...

Determining the stress around a mining excavation is a complex issue of Geomechanics and implicitly of the mining area. The evaluati on of stress state is essential, but very difficult to obtain, due to the interaction of the instrument ation with the rock massif. The measurement methods, together with the devices and the methods of processing and interpretation of data, ensure and create the possibility of knowing the degree of dependence between the measured effects in terms of time, and the factors causing them...

Induced and natural seismicity discrimination in seismically active regions remains one of the complicated problems. An example of unusual seismicity pattern, which is currently recognized by seismologists as triggered seismicity due to oil and gas field production is considered in this work. We ha ve analyzed the seismicity behavior in seismogenic zone without any human-made activity as well as in hydrocarbon production area. We conclude that examined areas are characterized by the same dynamic regime. It follows...

Factors that influence the geomechanical char acteristics of rocks can be of different nature, being divided into two broad categories of external factors and internal factors. Internal factors influencing the geomechanical characteristics of the rocks are the geological, physical and chemical. From the geological point of view, the main characteristics that influence the behavior of rocks are: mineralogical composition, structure and texture. From Physical and ch emical point of view rocks are directly influenced...

In seismic microzonation we want to display the variation in seismic response of the subsurface and subsequently determine where the soil is being amplified to a level that may damage existing buildings or other structures. Frequently peak ground acceleration (PGA) is used to determine the maximu m horizontal forces that can be expected. The method is not always adequate, because PGA often corresponds to high frequencies, which are out of range of the natural frequencies of most structures. The largest amplificati...

The crack propagation mechanism of rocks under tensile and compressive loading conditions has been investigated. A higher order indirect boundary element method using special crack tip elements has been used to solve the various example problems in rock fracture mechanics. It is concluded that the brittle rocks fail due to the mixed mode fracture propagation under both tensile and compressive loading conditions. The micro- cracks are initiated due to tens ile or tensile and shear under tensile loadings and due to ...

Analysis of the horizontal strains of the ground subsidence due to underground excavation in rock can be accomplished by a hybridized higher order indirect boundary element/ finite difference (BE/FD) formulation. The higher order displacement discontinuity field is obtai ned by using the quadratic displacement discontinuity elements (i.e each higher order element is divided into three sub-elements bearing a quadratic variation of displ acement discontinuities). Then th e classic finite difference formulation (i.e....

The aim of this paper consists in highlighting the feasible technical solution in a real situation, namely to achieve the consolid ation of the road accessing the monitoring block from Obrejii-of-CДѓpГўlna dam. As a consequence of the landslides occurred on the left flank, between the intersection with national road DN 67C and Podu Vacii point, at about 50 - 60 m downstream the dam, it was proposed the narrowing of the access road platform, to the surveillan ce and control block of the dam, on 20 - 30 m length. Ac...

Road structures construction and maintenance involves the use of large amounts of materials, including natural aggregates that occupies the largest share. On one hand the quality of natural aggregates, and other road ma terials, is decisive for the success of the technologies used in the road construction sector and on the other hand, the diversity, and number of the possibilities of purchasing and the number of producing units are more varied for natural a ggregates with possibilities to significantly influence t...

The aim of the paper is to in form on the need to apply geological information in land use planning and other state administration spheres, such as building office services. The study was carried out with in the locality specified by a map sheet 15 44 07 in 1:10 000 scale, in the cadastral district of Petr vald, Orlova, Horni Such a in the north-east of the Czech Republic close to the Polish border. The subject of the study is an evaluation of geobarriers of rock workability, inundatio n area and radon index. A si...

The existing groundwater source for the public water supply of Be čej city in Serbia tapping groundwater from three water-bearing horizons over 15 wells with summary capacity of 100 l/s. Near the public water source of Bečej exists groundwater source for industry with capacity of 12 l/s which tapped same horizons. In the coming period is planned to increase summary capacity of this groundwater source up to 57 l/s. Also, the increase of summary city’s s ource capacity is planned for 50 % in the next few years, ...

The paper deals with some factors influencin g the values of sandy soils shear strength parameters, obtained by direct shear test (DST). Influences of density, shear area changing and number of specimens on the test result of clayey sand (SC) and sand with some fines (S-F) are examined. Influences of the density on the values of sandy soils shear strength parameters will be introduced in the paper by the tests with density index 6 . 0 ; 3 . 0=DI and 0.9. Influences of the shear area changing on the values of sandy...

This publication presents th e assessment studies of two important characteristics, limiting the utilization of the geological envi ronment for various pu rposes, especially construction. The first is the character of the pre-quaternary bedrock, other is the rock workability. Character of the pre-quaternar y bedrock and its depth is important primarily for the complex foundation engineering. They carry the greater load caused by the weight of the structure itself. Therefore, it is often necessary to carry the weig...

The purpose of this study is to present an application of the Static and Dynamic Rock Durability Indicators in order to estimate durability and weathered state of rock material used in the engineering structure. Durability of rocks can be defined as the rock’s ability to resist degradation during its working life. No one engineering test can be used as an absolute predictor of performance of building stone in service. Therefore a variety of approaches have been developed to estimat e of the durability of buildin...

The widespread use of various types of ro cks in construction, construction materials industry and in raw material production implicitly requires a detailed knowledge of their geo-mechanical characteristics. The use of ro cks in the execution of various works is only allowed if they fall within certain quality criteria. With in this context, in the Geo- Mechanics Laboratory from the University of Petro Еџani, a complete assessment of the geo-mechanical properties of rocks from S outhern VГўlcan Massif was carried ...

The purpose of this publication is to evaluate the geological environment for its suitability, respective unsuitability for foundation engineering. The means to realisation this objective was the study about extension of the engineering-geological zones on a map sheet 15-44-08 in studied area. This is an area municipalities in the Doly, Spa Darkov, Stonava and Horni Sucha. It is a mining area in the northeastern part of the Czech Republic. There were detected the speci es of the engineering-geological zones, the l...

Authors present some factors influencing the values of sandy soils shear strength parameters, obtained by direct shear test (DST) in another paper for the conference. In mentioned paper, the influences of density, shear area changing and number of specimens on the test result of clayey sand (SC) and sand with some fines (S-F) are analysed. In this paper, authors present how various values of soils shear strength parameters obtained by DST will influence the size of spread foundation placed in those soils. In the p...

With changes in Romania’s development strategy, as a result of accession in the European Union, but also with climate change increasingly affecting more lives in that increased upper and lower limits of temperat ure and precipitation, it was necessary to develop new asphalt recipes and to employ of conditions applying new screening criteria, to aggregates in accordance with these changes. Within this context, the present paper proposes a study that relates the distance transport of aggregates from the source are...

The object of this study is to locate the zones of groundwater discharge into the eastern shores of the Dead Sea. To achieve this object the electrical conductivity-temperature with a depth method was used. This study show ed that the Dead Sea divides into two layers relating to the electrical conductivity and temperature with depth. The upper layer subdivided into two members. The upper member extends from the sea surface down to a depth of 15-25 m. The lower member extends from a depth of 15-25 m to 40 m and it ...