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Linkage of "Lakes Zwenkau-Cospuden" as one of the elements of land reclamation after the open-cast mines and its future importance for the development of the region

100%

Gabrys K.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2012

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tom 44

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nr 1

The open-cast mine “Böhlen”, closed in 1921, in 1969 was transformed into “Zwenkau”(“Zw”) open-cast mine. In the seventies, together with its smaller neighbouring mine “Cospuden”(“Cs”), became one of the greatest enterprises of the Central German lignite mining area. In the last centuries Zw and Cs mines had an significant influence on the economic, technical and scientific progress of this region. Although the mines were in separate mining areas, very close relations of proximity existed between them, particularly in the superposition of the lowering ground water areas. Thus, the total mass of the mine tailings “Cospuden” in the mining sector “Zwenkau” was flattened and designed for land reclamation. Since the cessation of lignite mining in the area Böhlen/Zwenkau/Cospuden the south region from Leipzig has been changed fundamentally. The remaining holes, which mines left behind, became lakes. Along the lakes raised beaches, ports and holiday houses. Lusatia and Central German Mining Administration Company (LMBV), which is now responsible for the reclamation and rehabilitation of disused mines, proposed a new perspective of this region, perceived as a part of nature and human-being. The main emphasis has been placed on the development of created lakes, flow-up phase and good water quality assurance. Some of the new lakes are connected together with artifi cial canals and locks. This also relates to “Zwenkau-Cospuden Lakes” (LMBV 2009). In this article the methods of management former mining areas in the South from Leipzig, with the great accent put on the linkage of “Lakes Zwenkau-Cospuden”, are described. Necessary test on the soil samples from this field are explained. Finally, the influence of the restoration of the area on the development of the region is shown.

2

Toksoplazmoza kotów

63%

Gabrys A., Gabrys K.

Wiadomości Parazytologiczne

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1963

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tom 09

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nr 3

On the basis of the data in the literature the authors discuss toxoplasmosis of cats. Next they describe the attempt to infect 4 cats with toxoplasmosis. The cats No. 1and 2 were infected subcutaneously with the strain MC - 12 (about 15 millions of toxoplasmas), the cat No. 3 was kept without infection from the cats No. 1 and 2, but the cat No. 4 was infected with the strain RH (about 15 millions of toxoplasmas) intraperitoneally. Clinical symptoms were observed only in the cats No. 1and 2, after 2 to 3 days they became saddened, lost appetite and became dull. In the cat No. 1 these symptoms retreated after 5 days, and the cat No. 2 died on the 8th day following the infection. Postmortem examinations revealed catarrhal inflammation of the lungs and alimentary tract. Biological tests (passages on mice) revealed the presence of the toxoplasmas. Serological tests in all the examined cats gave negative results.

3

Parametry odkształceniowe i filtracyjne kredy jeziornej z obszaru Mazur

63%

Malinowska E., Gabrys K.

Przegląd Naukowy. Inżynieria i Kształtowanie Środowiska

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2010

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tom 19

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nr 4[50]

Strain and fi ltration parameters of lacustrine chalk from Mazury District. In this paper the strain and fi ltration parameters of lacustrine chalk from Mazury District are presented. To determinate the main engineers’ parameters the oedometer tests have been obtained. There were two types of laboratory tests: IL standard one and CLR – with the constant loading. The tests were performed on lacustrine chalk from Mazury District in North East Poland. The tests results allowed to describe relationships between stain and vertical effective stress. Also the relationship between constrained modulus and vertical effective stress with the most correlated equation was proposed. The relationship between fi ltration coeffi cient and void ratio was obtained. The constitutive equation for the relationship between fi ltration coeffi cient and void ratio was proposed: k = 1,0 · 10–12 · e3,5, where: k – fi ltration parameter, e – void ratio. Strain and fi ltration parameters obtain from laboratory oedometer tests proved the nonlinear relationship between stress-strain and stress-fi ltration.

4

The analysis of consolidation in organic soils

63%

Gabrys K., Szymanski A.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2010

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tom 42

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nr 2

This paper is devoted to the specific difficulties connected to construction on problematic soils. Different type of structures like: road embankments, flood control levees, dykes and dams are often located in soft subsoil areas, which consists mainly of peat, calcareous soil with a very high content of calcium carbonate and other high plasticity organic and no organic soils. These soils can be characterized as highly deformable with low initial shear strength and an insufficient bearing capacity. Soft soils show a large deformation, both vertically and horizontally, under load. The settlements often appear very quickly and can also continue for a long time. The consolidation process consists here of two main stages: primary settlement and secondary (and tertiary) settlement (creep). It is essential to have a good quality description of physical and mechanical properties of soil before the calculation and construction stage. For calculations of each stage of settlement the different physical and mechanical parameters of problematic soil are applied. In this paper the analysis of organic soils deformation process is presented. The deformation characteristics were defined on the basis of laboratory tests results. Soil investigations were performed on peat samples taken from test site located in Olsztyn region. Laboratory test of physical properties and consolidation tests in oedometer were carried out. Based on laboratory test results the empirical relationships between stress and deformation as well as stress and time were elaborated in order to describe the primary consolidation in organic soils.

5

Technika radiologicznego badania żylnego kości długich (osteomedulographia) u psa

63%

Czekala Z., Gabrys K.

Medycyna Weterynaryjna

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1963

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tom 19

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nr 05

6

Zatrucie jadem kiełbasianym u norek

63%

Gabrys K., Szaflarski J.

Medycyna Weterynaryjna

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1959

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tom 15

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nr 01

7

Laboratory measurement of shear stiffness in resonant column apparatus

63%

Sas W., Gabrys K.

Acta Scientiarum Polonorum. Architectura

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2012

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tom 11

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nr 4

8

Z badań alergometrycznych w toksoplazmozie psów

63%

Gabrys K., Szaflarski J.

Wiadomości Parazytologiczne

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1964

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tom 10

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nr 4-5

Allergometric examinations were performed in 50 dogs reacting positively with toxoplasmine. The types of the obtained reactions were: pleoergic (6.7%), homodynamic (40%), and pleoesthetic (53.3%). Its is believed that the reason for a comparatively high frequency of pleoesthesis is to be searched in breeding conditions and care of dogs. In the group of animals kept in azylum, fed on fall offs and slaughter confiscates, positive Sabin-Feldman reaction occurred in 17.9% of dogs. A similar, high percentage (18.8%) of positive serologic reactions was detected in 101 rural dogs, whereas among 153 race dogs belonging to members of Kynologic Society they were found only in 8.3%.

9

Kolumna rezonansowa jako urządzenie do badań dynamicznych gruntów spoistych

51%

Gabrys K., Sas W., Szymanski A.

Przegląd Naukowy. Inżynieria i Kształtowanie Środowiska

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2013

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tom 22

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nr 1[59]

10

Laboratoryjne badanie sztywności gruntu według Eurokodu 7

51%

Sas W., Gabrys K., Szymanski A.

Acta Scientiarum Polonorum. Architectura

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2013

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tom 12

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nr 3

Laboratoryjne badanie sztywności gruntu w przedziale małych odkształceń jest zadaniem niezwykle trudnym ze względu chociażby na niewystarczającą rozdzielczość i niezadowalającą dokładność urządzeń do pomiaru obciążeń oraz przemieszczeń. Istnieją możliwości regularnego przeprowadzania analiz sztywności gruntu dla małych odkształceń w aparacie trójosiowego ściskania z lokalnym pomiarem przemieszczeń. Niestety metoda ta ze względu na wysokie koszty stosowana jest zazwyczaj tylko w projektach badawczych. Dodanie elementów bender do aparatu trójosiowego znacznie ułatwiło przeprowadzanie badań prędkości rozchodzenia się fali ścinającej, a w konsekwencji – początkowego modułu ścinania. Badania te stały się proste i opłacalne, wykonywane powszechnie w laboratoriach geotechnicznych na całym świecie. W wymaganiach Eurokodu 7 brak jest obszernego, dokładnego opisu tej techniki badawczej, tym niemniej zasygnalizowane zostały specjalistyczne badania sztywności gruntu, na przykład wykorzystujące pomiar prędkości fal sejsmicznych, zwłaszcza w przypadku małych odkształceń (tj. mniejszych niż 0,1%). Dlatego też za właściwe uznano wyjaśnienie idei badań elementami bender. W artykule zaprezentowano zwięzłą metodykę badań w aparacie trójosiowego ściskania wyposażonym w piezoelementy typu bender, związaną z pomiarem prędkości fali ścinającej, wraz z przykładowymi wynikami badań doświadczalnych przeprowadzonymi na wybranym gruncie spoistym pochodzącym z terenu Warszawy. Ponadto wyznaczono zależności prędkości fali ścinającej oraz wartości początkowego modułu ścinania w funkcji na przykład średniego ciśnienia efektywnego.

11

Determination of Poisson’s ratio by means of resonant column tests

51%

Sas W., Gabrys K., Szymanski A.

Electronic Journal of Polish Agricultural Universities. Series Civil Engineering

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2013

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tom 16

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nr 3

12

Comparison of resonant column and bender elements tests on selected cohesive soil from Warsaw

51%

Sas W., Gabrys K., Szymanski A.

Electronic Journal of Polish Agricultural Universities. Series Civil Engineering

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2014

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tom 17

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nr 3

13

Wpływ tempa przekładania obciążenia na parametry odkształceniowe gruntów organicznych

51%

Sas W., Gabrys K., Szymanski A.

Przegląd Naukowy. Inżynieria i Kształtowanie Środowiska

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2010

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tom 19

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nr 3[49]

The infl uence of loading rate on deformation of organic soil. In this review paper the changes of deformation parameters in the organic soils characteristics are presented. The main view was put on the infl uence of loading rate on presented soils. The results of soft soils used to the analysis were obtained in laboratory using oedometer tests. To describe the deformation process of organic soils two kinds of oedometer tests were held: with gradually increasing load and constant load. Both techniques show the wide range of factors determine deformations and settlements of organic subsoil, among which important are also the velocity and the value of loading rate.

14

Small-strain dynamic characterization of clayey soil

51%

Gabrys K., Sas W., Sobol E.

Acta Scientiarum Polonorum. Architectura

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2015

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tom 14

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nr 1

An appropriate evaluation of dynamic soil properties is important for proper seismic response analysis and soil modelling programs. The primary aim of this study was to investigate the dynamic properties of clayey soil from Warsaw area, taking into consideration some of the selected factors affecting the shear modulus (G) and the damping ratio (D) of examined samples. A series of resonant column tests were conducted to study the effect of applied pressure and shear strain amplitude on soil stiffness and its damping properties. These parameters were reviewed, investigated and discussed. On the basis of the results obtained from these tests as well as the theoretical analysis, it can be established that confining pressure and the range of considered strain had a significant influence on the dynamic shear modulus and on the dynamic damping ratio. The impact of stress level on D is also discussed.

15

Dynamic and cyclic static loading behavior of silty-sandy clay at small and moderate strains

51%

Gabrys K., Sas W., Sobol E.

Acta Scientiarum Polonorum. Architectura

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2016

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tom 15

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nr 4

The shear modulus (G) is one of the key parameters for seismic ground response analysis and it can be usually determined by means of dynamic tests (DT), such as resonant column test (RCT), or cyclic static test (CST), e.g. torsional shear (TST). The RC and TS tests are widely used laboratory methods to find stiffness of soil at small to medium strain range (0.0001–0.5%). The purpose of this paper is to present the experimental results from RC and CS laboratory tests on silty-sandy clay from the western part of Warsaw, Poland. The study aims to compare the shear modulus values obtained from two different research techniques. The influence of, in particular, the applied effective pressure, associated shear strain and experimental method (i.e. loading frequency and output amplitude) on the shear modulus at small strains (Gmax) and secant shear modulus (G) are investigated and proved. Generally, the results reveal that the examined soils stiffness calculated from TS tests is lower than from RC tests.

16

Main physical-mechanic properties of concrete samples taken from Bražuolė - first removed dam in Lithuania

51%

Sadzevicius R., Adamonyte I., Gabrys K., Kucharski M.

Acta Scientiarum Polonorum. Architectura

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2021

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tom 20

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nr 4

17

Material damping ratio from free-vibration method

51%

Gabrys K., Sobol E., Sas W., Szymanski A.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2018

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tom 50

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nr 2

18

Nonlinear dynamic properties of silty clay from Warsaw area

51%

Sas W., Gabrys K., Sobol E., Szymanski A.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2016

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tom 48

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nr 3

19

Interaction of Micrococcus luteus with cadmium compounds and the FOR model of bacterial growth

45%

Pacha J., Galimska-Stypa R., Wojtyczka R. D., Piotrowska-Seget Z., Gabrys K.

Polish Journal of Natural Sciences

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2005

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tom 19

339-345

20

The small strain stiffness from bender elements tests for clayey soils

45%

Markowska-Lech K., Sas W., Gabrys K., Lech M., Szymanski A.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2018

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tom 50

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nr 4

Ograniczanie wyników

Linkage of "Lakes Zwenkau-Cospuden" as one of the elements of land reclamation after the open-cast mines and its future importance for the development of the region

Toksoplazmoza kotów

Parametry odkształceniowe i filtracyjne kredy jeziornej z obszaru Mazur

The analysis of consolidation in organic soils

Technika radiologicznego badania żylnego kości długich (osteomedulographia) u psa

Zatrucie jadem kiełbasianym u norek

Laboratory measurement of shear stiffness in resonant column apparatus

Z badań alergometrycznych w toksoplazmozie psów

Kolumna rezonansowa jako urządzenie do badań dynamicznych gruntów spoistych

Laboratoryjne badanie sztywności gruntu według Eurokodu 7

Determination of Poisson’s ratio by means of resonant column tests

Comparison of resonant column and bender elements tests on selected cohesive soil from Warsaw

Wpływ tempa przekładania obciążenia na parametry odkształceniowe gruntów organicznych

Small-strain dynamic characterization of clayey soil

Dynamic and cyclic static loading behavior of silty-sandy clay at small and moderate strains

Main physical-mechanic properties of concrete samples taken from Bražuolė - first removed dam in Lithuania

Material damping ratio from free-vibration method

Nonlinear dynamic properties of silty clay from Warsaw area

Interaction of Micrococcus luteus with cadmium compounds and the FOR model of bacterial growth

The small strain stiffness from bender elements tests for clayey soils