| ATTRIBUTE | VALUE |
|---|
| type | A |
| database id | 7703 |
| title | A study on pull-out resistance of dynamically driven nails and cavity expansion method |
| authors | Sawicki A. |
| pages | 243 — 260 |
| notes | Kopia w oprac. Tp4240 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem57str243.pdf |
| keywords | soil nailing, cavity expansion, cone penetration tests |
| affiliations | - Institute of Hydro-Engineering, Polish Academy of Sciences, Kościerska 7, 80-328 Gdańsk, Poland, e-mail: as@ibwpan.gda.pl
|
| abstracts | The problem is how to assess normal stresses around dynamically driven nails. Pull-out tests
show that these stresses are much higher than it would follow from classical analyses. Therefore,
an analysis of the cavity expansion method was applied to study this problem. It was
shown that the cavity expansion method, widely applied in soil mechanics, suffers from many
shortcomings. It was also shown that this method is not closely related to cone penetration
tests, nor to the technology of dynamic soil nailing. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 6 |
| ATTRIBUTE | VALUE |
|---|
| type | A |
| database id | 7453 |
| title | Finite difference analysis of water wave scattering by underwater rectangular obstacles |
| authors | Szmidt K. |
| pages | 179 — 197 |
| notes | Maszynopis w oprac. Tp4203 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem57str179.pdf |
| keywords | water wave, scattering of waves, finite difference method |
| affiliations | - Institute of Hydro-Engineering of the Polish Academy of Sciences (IBW PAN), ul. Kościerska 7, 80-328 Gdańsk, Poland, email: jks@ibwpan.gda.pl
|
| abstracts | This paper deals with the problem of the scattering of surface water waves by underwater
obstacles. The main goal of the investigations is to estimate the efficiency of such structures
in protecting sea shelf zones from open sea waves. A useful measure of the protection is the
ratio of the square of the amplitude of the transmitted wave to the square of the amplitude of
the arriving wave. The problem is formulated in terms of the finite difference method. It is
shown that the discrete approach to the problem leads to eigenvalue problems for two matrices
resulting from the discrete description. As compared to analytical formulation, the discrete
method may be convenient in application to unsteady problems and obstacles of complicated
geometry. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 6 |
| ATTRIBUTE | VALUE |
|---|
| type | A |
| database id | 8065 |
| title | Application of thermoporometry based on convolutive DSC to investigation of mesoporosity in cohesive soils |
| authors | Tomasz Kozłowski, Izabela Babiarz, Edyta Grobelska |
| pages | 199 — 218 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem57str199.pdf |
| keywords | pore distribution, thermoporometry, DSC (Differential Scanning Calorimetry), cohesive soils, montmorillonite |
| affiliations | - Department of Geotechnical and Water Engineering, Kielce University of Technology, ul. Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, Poland, e-mails: tomkoz@tu.kielce.pl, IzabelaBabiarz@interia.pl, edytagrobelska@gmail.com
|
| abstracts | In the method of thermoporometry, the characterization of pore space is done by analysis of
thermal effects associated with freezing and melting of a liquid in the pores of the material
under investigation. Thermoporometry seems particularly well suited to studies of wet porous
samples in cases where the process of drying itself is able to destroy the original microstructure,
as is the cohesive soils containing montmorillonite. In the paper, a variant of thermoporometry
is given in which the blurred calorimetric peak is processed by use of a stochastic-convolutive
analysis. As a result, a “sharp” thermogram of real thermal effects is obtained which can be
easily transformed into a pore distribution curve. The preliminary results, obtained for samples
of three monoionic montmorillonites at different water contents, indicate a greater resolution,
sensitivity and precision than the classical thermoporometry using an unprocessed DSC signal.
Phenomena corresponding to swelling have been detected in two individual regions on the
differential pore distribution curves. The first is a dense spectrum for pores less than 15 nm. The
second is a single peak for pores greater than 15 nm. Between the two regions the distribution
decays to zero. Apparently, the point of the single peak maximum depends on the total water
content, shifting rightward with increasing w. For the region below 20 nm, a strong effect of
the kind of exchangeable cation can be observed. The results suggest swelling in the form with
bivalent cations (Ca-montmorillonite) and contraction in the form with monovalent cations
(Na- and K-montmorillonite). |
| attributes | [reviewed] [scientific] |
| language | en |
| ATTRIBUTE | VALUE |
|---|
| type | A |
| database id | 7858 |
| title | Hydrodynamics and lithodynamics of dissipative and reflective shores in view of field investigations |
| authors | Ostrowski R., Pruszak Z., Skaja M., Szmytkiewicz M., Trifonova E., Keremedchiev S., Andreeva N. |
| pages | 219 — 241 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem57str219.pdf |
| keywords | cross-shore profile, waves, currents, grain size distributions, sediment transport |
| affiliations | - Institute of Hydro-Engineering, Polish Academy of Sciences, Kościerska 7, 80-328 Gdańsk, Poland, e-mail: rafal.o@ibwpan.gda.pl,
- Institute of Oceanology of the Bulgarian Academy of Sciences (IO BAS), 9000 Varna, PO Box 152, Bulgaria, e-mail: trifonova@io-bas.bg
|
| abstracts | The paper presents a comparative analysis of physical processes occurring at two different
coasts, which belong to two different European seas. The first coast under examination comprises
the sandy shore nearby Lubiatowo, located at the south Baltic Sea in Poland. The second
site is represented by the sandy coast in Shkorpilovtsi, located at the west Black Sea in Bulgaria.
Both sites are equipped with field research facilities ensuring extensive and precise in situ
investigations. The study is focused on differences and similarities of hydro- and lithodynamics
as well as the nearshore morphology between the above coastal zones. The present analysis is
based on the results of the field campaigns carried out in recent years at the research facilities
in Lubiatowo and Shkorpilovtsi. Considering the way in which wave energy transforms on the
cross-shore profile, the sea shore at Lubiatowo is found distinctly dissipative while the shore at
RB Shkorpilovtsi has a reflective character. This fact implies some differences in the features
of wave-current motion and sediment transport. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 6 |