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Affiliations: Vytautas Magnus university - assoc. prof. at Institute of Hydraulic engineering - started at 2019 Aleksandras Stulginskis university - assoc. prof. at Department of Building Constructions - started at 2013 University of Applied Engineering Sciences - assoc. prof. at Department of Civil Engineering - started at 2014 Kaunas Forestry and Environmental Engineering University of Applied Sciences - assoc. prof. at Department of Hydrotechnical Construction - started at 2012 Membership of professional bodies: Lithuanian Geotechnical Society Lithuanian Association of Land and Water Management Engineers (LŽHIS) Lithuanian Society for Engineering Graphics and Geometry Lithuanian Scientific Society (LSS) • group No.8 in public company “Digital Construction” • Board at Water and land management Faculty at Aleksandras Stulginskis university • Construction Engineering Field Study Committee at Kaunas University of Applied Engineering Sciences • organizing committee in Conference „Civil Engineering 2013, 2015“, Latvia • organizing committee in Conference „NEW DIRECTIONS IN AGRICULTURE AND RURAL DEVELOPMENT”XII. Wellmann International Scientific Conference 2013, Hungary
Buried pipe design requires knowledge about the fill to design the backfill structure. The interaction between the backfill envelope and the pipe impacts the structural performance of the buried pipe. The backfill material and compaction level respond to the backfill’s overall strength and, therefore, for pipe-soil interaction. The strength of backfill material is described in terms of modulus of soil reaction E’ and constrained modulus Eode . As the E’ is an empirical parameter, the Eode can be measured in the laboratory by performing the oedometer tests. In this study, we have performed extensive oedometric tests on five types of anthropogenic materials (AM). Three of them are construction and demolition materials (C–D materials) namely, recycled concrete aggregate (RCA), crushed brick (CB), and recycled asphalt pavement (RAP). Two of them are industrial solid wastes (ISW) namely, fly ash and bottom slag mix (FA + BS) and blast furnace slag (BFS). The results of the tests revealed that AM behaves differently from natural aggregates (NA). In general, the Eode value for AM is lower than for NA with the same gradation. Despite that, some of AM may be used as NA substitute directly (RCA or BFS), some with special treatment like CB and some with extra compaction efforts like RAP or FA + BS.
Andrzej Głuchowski; Raimondas Šadzevičius; Rytis Skominas; Wojciech Sas. Compacted Anthropogenic Materials as Backfill for Buried Pipes. Materials 2021, 14, 717 .
AMA StyleAndrzej Głuchowski, Raimondas Šadzevičius, Rytis Skominas, Wojciech Sas. Compacted Anthropogenic Materials as Backfill for Buried Pipes. Materials. 2021; 14 (4):717.
Chicago/Turabian StyleAndrzej Głuchowski; Raimondas Šadzevičius; Rytis Skominas; Wojciech Sas. 2021. "Compacted Anthropogenic Materials as Backfill for Buried Pipes." Materials 14, no. 4: 717.
After obtaining the value of shear wave velocity (VS) from the bender elements test (BET), the shear modulus of soils at small strains (Gmax) can be estimated. Shear wave velocity is an important parameter in the design of geo-structures subjected to static and dynamic loading. While bender elements are increasingly used in both academic and commercial laboratory test systems, there remains a lack of agreement when interpreting the shear wave travel time from these tests. Based on the test data of 12 Warsaw glacial quartz samples of sand, primarily two different approaches were examined for determining VS. They are both related to the observation of the source and received BE signal, namely, the first time of arrival and the peak-to-peak method. These methods were performed through visual analysis of BET data by the authors, so that subjective travel time estimates were produced. Subsequently, automated analysis methods from the GDS Bender Element Analysis Tool (BEAT) were applied. Here, three techniques in the time-domain (TD) were selected, namely, the peak-to-peak, the zero-crossing, and the cross-correlation function. Additionally, a cross-power spectrum calculation of the signals was completed, viewed as a frequency-domain (FD) method. Final comparisons between subjective observational analyses and automated interpretations of BET results showed good agreement. There is compatibility especially between the two methods: the first time of arrival and the cross-correlation, which the authors considered the best interpreting techniques for their soils. Moreover, the laboratory tests were performed on compact, medium, and well-grained sand samples with different curvature coefficient and mean grain size. Investigation of the influence of the grain-size characteristics of quartz sand on shear wave velocity demonstrated that VS is larger for higher values of the uniformity coefficient, while it is rather independent of the curvature coefficient and the mean grain size.
Katarzyna Gabryś; Emil Soból; Wojciech Sas; Raimondas Šadzevičius; Rytis Skominas. Warsaw Glacial Quartz Sand with Different Grain-Size Characteristics and Its Shear Wave Velocity from Various Interpretation Methods of BET. Materials 2021, 14, 544 .
AMA StyleKatarzyna Gabryś, Emil Soból, Wojciech Sas, Raimondas Šadzevičius, Rytis Skominas. Warsaw Glacial Quartz Sand with Different Grain-Size Characteristics and Its Shear Wave Velocity from Various Interpretation Methods of BET. Materials. 2021; 14 (3):544.
Chicago/Turabian StyleKatarzyna Gabryś; Emil Soból; Wojciech Sas; Raimondas Šadzevičius; Rytis Skominas. 2021. "Warsaw Glacial Quartz Sand with Different Grain-Size Characteristics and Its Shear Wave Velocity from Various Interpretation Methods of BET." Materials 14, no. 3: 544.
The shear modulus and normalized shear modulus degradation curve are the fundamental parameters describing soil behavior. Thus, this article is focused on the stiffness characteristic of 15 different Warsaw cohesive soli represented by the parameters mentioned above. In this research, standard resonant column tests were performed in a wide shear strain range, from a small one, where soil behaves like an elastic medium, to a medium one, where soil has an unrecoverable deformation. Collected data allows the authors to create empirical models describing stiffness characteristics with high reliability. The maximum shear modulus calculated by the proposed equation for Warsaw cohesive soil had a relative error of about 6.8%. The formula for normalized shear modulus estimated G/GMAX with 2.2% relative error. Combined empirical models for GMAX, and G/GMAX allow the evaluation of Warsaw cohesive soil’s shear modulus value in a wide shear deformation range, with a very low value of the relative error of 6.7%.
Emil Soból; Katarzyna Gabryś; Karina Zabłocka; Raimondas Šadzevičius; Rytis Skominas; Wojciech Sas. Laboratory Studies of Small Strain Stiffness and Modulus Degradation of Warsaw Mineral Cohesive Soils. Minerals 2020, 10, 1127 .
AMA StyleEmil Soból, Katarzyna Gabryś, Karina Zabłocka, Raimondas Šadzevičius, Rytis Skominas, Wojciech Sas. Laboratory Studies of Small Strain Stiffness and Modulus Degradation of Warsaw Mineral Cohesive Soils. Minerals. 2020; 10 (12):1127.
Chicago/Turabian StyleEmil Soból; Katarzyna Gabryś; Karina Zabłocka; Raimondas Šadzevičius; Rytis Skominas; Wojciech Sas. 2020. "Laboratory Studies of Small Strain Stiffness and Modulus Degradation of Warsaw Mineral Cohesive Soils." Minerals 10, no. 12: 1127.
Extreme floods become more frequent and is the reason rising load on structures in rivers and the risk to be damaged. The methods of scour calculation at bridge abutments are based on that design flood up to 1% probability (Arneson et al. 2012) accepted by many authors is constant during the maintenance period of the bridge and the equilibrium depth of scour often used for foundation design. Inspite of that equilibrium depth of scour sometimes can be overestimated, because in nature scour is formed under unsteady flow. The bridge abutments usually are constructed on the floodplain, where is no sediment movement, here we considering scour at clear water conditions and estimating scour evolution when sediments are removing out of scour hole. As a basis, the equation of the bed sediment movement was used and a semi-analytical model for computing depth of scour evolution under unsteady flow at the abutments is elaborated. The tests were made in flume for free surface flow conditions, for rigid and sand bed of the bridge crossing model with different contraction rate, depth, discharge, Froude number, steady and unsteady flow, with uniform or stratified bed. To study different parameters impact on scour at the abutment, More than 50 tests were made. Tests results are in good agreement with calculated data by model presented. In the paper is presented the relative local and critical velocities evolution, impact the bed material, flow contraction and unsteady flow on scour depth under clear water conditions at vertical wall abutment.
Boriss Gjunsburgs; Algirdas Radzevičius; Raimondas Šadzevičius; Rytis Skominas. Scours Evolution at Bridge Abutments Under Unsteady Flow Events. Iranian Journal of Science and Technology, Transactions of Civil Engineering 2020, 45, 1951 -1957.
AMA StyleBoriss Gjunsburgs, Algirdas Radzevičius, Raimondas Šadzevičius, Rytis Skominas. Scours Evolution at Bridge Abutments Under Unsteady Flow Events. Iranian Journal of Science and Technology, Transactions of Civil Engineering. 2020; 45 (3):1951-1957.
Chicago/Turabian StyleBoriss Gjunsburgs; Algirdas Radzevičius; Raimondas Šadzevičius; Rytis Skominas. 2020. "Scours Evolution at Bridge Abutments Under Unsteady Flow Events." Iranian Journal of Science and Technology, Transactions of Civil Engineering 45, no. 3: 1951-1957.
The construction of a roads network consumes high amounts of materials. The road materials are required to fulfill high standards like bearing capacity and low settlement susceptibility due to cyclic loading. Therefore, crushed aggregates are the primary subbase construction material. The material-intensity of road engineering leads to depletion of natural resources, and to avoid it, the alternative recycled materials are required to be applied to achieve sustainable development. The anthropogenic soils (AS), which are defined as man-made unbound aggregates, are the response to these requirements. For the successful application of the AS, a series of geotechnical laboratory and field tests were conducted. In this article, we present the set of 58 test results, including California Bearing Ratio (CBR) bearing capacity tests, oedometric tests, and cyclic CBR tests, to characterize the behavior of three AS types and to compare its reaction with natural aggregate (NA). The AS tested in this study are recycled concrete aggregate (RCA), fly ash and bottom ash mix (BS), and blast furnace slag (BFS). The results of the tests show that the AS has similar characteristics to NA, and in some cases, like compression characteristic, RCA and BFS behave a stiffer response to cyclic loading. The test results and analysis presented here extend the knowledge about AS compressibility and AS response to cyclic loading.
Andrzej Głuchowski; Katarzyna Gabryś; Emil Soból; Raimondas Šadzevičius; Wojciech Sas. Geotechnical Properties of Anthropogenic Soils in Road Engineering. Sustainability 2020, 12, 1 .
AMA StyleAndrzej Głuchowski, Katarzyna Gabryś, Emil Soból, Raimondas Šadzevičius, Wojciech Sas. Geotechnical Properties of Anthropogenic Soils in Road Engineering. Sustainability. 2020; 12 (12):1.
Chicago/Turabian StyleAndrzej Głuchowski; Katarzyna Gabryś; Emil Soból; Raimondas Šadzevičius; Wojciech Sas. 2020. "Geotechnical Properties of Anthropogenic Soils in Road Engineering." Sustainability 12, no. 12: 1.
Raimondas Sadzevicius; Tatjana Sankauskienė; Rytis Skominas. Durability of Concrete Covering Layer of Reinforced Concrete Slabs for Earth Dam Slope Protection. Civil engineering '17 : 6th International Scientific Conference "Research for Environment and Civil Engineering Development 17” 2018, 1 .
AMA StyleRaimondas Sadzevicius, Tatjana Sankauskienė, Rytis Skominas. Durability of Concrete Covering Layer of Reinforced Concrete Slabs for Earth Dam Slope Protection. Civil engineering '17 : 6th International Scientific Conference "Research for Environment and Civil Engineering Development 17”. 2018; ():1.
Chicago/Turabian StyleRaimondas Sadzevicius; Tatjana Sankauskienė; Rytis Skominas. 2018. "Durability of Concrete Covering Layer of Reinforced Concrete Slabs for Earth Dam Slope Protection." Civil engineering '17 : 6th International Scientific Conference "Research for Environment and Civil Engineering Development 17” , no. : 1.
Raimondas Sadzevicius; Tatjana Sankauskienė; Rytis Skominas. Durability of Concrete Covering Layer of Reinforced Concrete Slabs for Earth Dam Slope Protection. Civil engineering '17 : 6th International Scientific Conference "Research for Environment and Civil Engineering Development 17” 2018, 1 .
AMA StyleRaimondas Sadzevicius, Tatjana Sankauskienė, Rytis Skominas. Durability of Concrete Covering Layer of Reinforced Concrete Slabs for Earth Dam Slope Protection. Civil engineering '17 : 6th International Scientific Conference "Research for Environment and Civil Engineering Development 17”. 2018; ():1.
Chicago/Turabian StyleRaimondas Sadzevicius; Tatjana Sankauskienė; Rytis Skominas. 2018. "Durability of Concrete Covering Layer of Reinforced Concrete Slabs for Earth Dam Slope Protection." Civil engineering '17 : 6th International Scientific Conference "Research for Environment and Civil Engineering Development 17” , no. : 1.