Naslov
Undrained Ring Shear Tests Performed on Samples from Kostanjek and Grohovo Landslide

Autori
Ostrić, Maja ; Ljutić Kristijan ; Krkač Martin ; Setiawan Hendy ; He, Bin ; Sassa, Kyoji

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the IPL Symposium / Sassa, Kyoji ; Takara, Kaoru ; He, Bin - Kyoto, 2012, 47-52

Skup
IPL Symposium

Mjesto i datum
Kyoto, Japan, 20.01.2012

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
landslide ; ring shear test ; undrained speed control test

Sažetak
Kostanjek and Grohovo landslides were chosen for research as pilot areas within Croatia-Japan Joint Research Project. Laboratory soil testing along with monitoring and modelling of landslides are planned for the analyses of these two landslides. For this purpose, new, transportable ring shear apparatus, ICL-1, was designed. Although smaller in dimensions compared with previous versions, it has high capacity ; it can load normal stress and keep undrained condition of pore water pressure up to 1 MPa. Ring shear apparatus has two purposes: it can be used for the basic soil tests (for determination of soil parameters) and for the landslide simulation test. This paper presents the use of the new apparatus for obtaining basic soil parameters on surface samples from two Croatian landslides: shale sample from Kostanjek and clay sample from Grohovo landslide. The aim of the work was to establish testing procedure and obtain preliminary results on surface samples. Speed control tests were conducted under constant shear speed of 0.002 cm/sec and until shear displacement reached 1-3 m, in order to obtain steady state condition. From speed control test results, peak, mobilized and apparent friction angle for both materials are obtained. Test results are in accordance with data obtained by earlier laboratory tests and back analysis. The testing procedure used and preliminary results obtained will be used for planning and conducting of tests on borehole samples.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo, Rudarstvo, nafta i geološko inženjerstvo

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