Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Przegląd Geologiczny

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Możliwości oceny stanu technicznego wałów przeciwpowodziowych na podstawie badań geofizyki inżynierskiej

Ostrowski S., Lasocki M.

Przegląd Geologiczny

2014

Vol. 62, nr 10/2

671--679

Catastrophic floodings caused by floodbank and dam failures draw attention to urgent need of modernization of these facilities in Poland. The task specified above requires precise and fast methods of technical condition assessment of existing facilities. Present method of assessment of the geotechnical parameters of flood embankments and its geological setting is limited to sampling and geotechnical probing in discrete intervals, which are too sparse to recognize zones of weakening or unfavourable geologic conditions that might constitute critical zones for floodbank stability. This paper presents results and conclusions of experimental survey concluded in 2014 attempting to apply near-surface geophysical methods to floodbank condition assessment. In author's opinion, three techniques applied yielded most reliable results. Moreover the methods – electric resistivity tomography; seismic refraction tomography and multichannel analysis of surface waves can be optimised for utilisation for fast surveys on floodbanks. Authors give attention to results of above mentioned three geophysical methods and only briefly discuss the applicability of other near-surface geophysical methods for issues concerning floodbank technical condition.

Wykorzystanie przypowierzchniowych badań geofizycznych w rozpoznaniu budowy geologicznej na przykładzie stref osuwiskowych w Karpatach

Ostrowski S., Rybak-Ostrowska B., Lasocki M.

Przegląd Geologiczny

2013

Vol. 61, nr 1

67–-73

The paper presents three examples of application of geophysical surveys carried out by the PBG Ltd. for the recognition of internal structure, geological background and mechanical properties of near- -surface rock medium at major landslides in the Polish Outer Carpathians. Geophysical data were used for developing an accurate geological model of the landslides. Geological features that cannot be detected by other means, e.g. faults in bedrock, and exact location and shape of the shear plane were delineated in two-dimensional mode on the sections.