Influence of weathering processes on the shear strength of siltstones from a flysch rock mass along the northern Adriatic coast of Croatia

Prodan, Martina Vivoda; Mileusnić, Marta; Arbanas, Snježana Mihalić; Arbanas, Željko

doi:10.1007/s10064-016-0881-7

Cited by 26 publications

(27 citation statements)

References 35 publications

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“…Mechanical weathering also influences the chemical weathering of flysch components. Fine-grained fractions, such as siltstones, are the most affected by chemical weathering [2]. As a result of these processes, the flysch rock mass increases in volume over time, disintegrating to silt or clay.…”

Section: Materials and Study Areamentioning

confidence: 99%

“…Undisturbed soil samples were 2 Geofluids collected from the sample pit in the central part of the Valići Landslide (position 2 in Figure 1), and a series of tests were conducted to determine the basic index properties of the soil. Sampling was performed from the surface at a small handdrilled pit by using hard-plastic tubes (Figure 2(a)).…”

Section: Materials and Study Areamentioning

confidence: 99%

“…The saturated and residual volumetric water contents correspond to the silts, while α = 0 005 and n = 1 332 are characteristic values for the silty clay and clay loam textures, respectively. On the other hand, the saturated shear strength parameters determined in the previous studies [2] are commonly obtained in materials with a significant portion of sandy particles.…”

Section: Prediction Modelsmentioning

confidence: 99%

“…Previous studies of landslides in flysch slopes have mainly focused on the increase in pore water pressure caused by long-term, heavy precipitation as a landslide triggering factor [1] and on the effects of the weathering process of flysch rock masses on the soil shear strength [2,3]. The influence of the rainfall pattern and antecedent rainfall, coupled with the unsaturated soil property functions (USPFs) that govern the complex infiltration processes between the soil surface and the phreatic line, was not considered.…”

Section: Introductionmentioning

confidence: 99%

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Soil-Water Characteristic Curve of Residual Soil from a Flysch Rock Mass

et al. 2018

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Depending on the nature of the material and suction range, laboratory measurements of the soil-water characteristic curve (SWCC) can be time-consuming and expensive, especially for residual soils, in which a wide range of particle sizes and soil structures typically results in SWCCs that cover a wide range of suction. Investigations of the SWCCs of residual soil from flysch rock masses are rare, and so far, no results were presented in the literature which were obtained by performing measurements on undisturbed specimens. In this paper, a detailed examination of water retention characteristics is performed for a specific type of residual soil (CL) formed by the weathering of a flysch rock mass. Measurements performed by using different techniques and devices on intact specimens were successfully combined to obtain the SWCC during both drying and wetting processes, under different stress conditions, and from saturated to air-dried conditions. Used procedures are suitable for the determination of SWCCs of soils that undergo volume changes during the drying or the wetting process, since instantaneous volumetric water content can be determined. Results presented in this paper can be used to assess the influence of desaturation of the residual soil covering flysch slopes during dry summer periods by providing key-in material properties required to analyze the transient rainfall infiltration process.

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Section: Materials and Study Areamentioning

confidence: 99%

Section: Materials and Study Areamentioning

confidence: 99%

Section: Prediction Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Soil-Water Characteristic Curve of Residual Soil from a Flysch Rock Mass

et al. 2018

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“…With a slight modification of the standard procedure [10], the apparatus would enable soft rock testing in both intact and degraded states of the samples subjected to laboratorysimulated weathering. However, the direct shear apparatus can be used in specific cases (highly weathered marl, subjected to numerous cycles of weathering) [11,12], although it should clearly be specified in which cases this use would be justified. Knowledge about material strength in all phases of service life of a structure enables its rational design and curbs down maintenance costs.…”

Section: Introductionmentioning

confidence: 99%

Testing the shear strength of soft rock at different stages of laboratory simulated weathering

2017

JCE

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Testing the shear strength of soft rock at different stages of laboratory simulated weatheringDetermination of the change in strength based on simulation of weathering process in laboratory conditions is described in the paper, using marl samples taken from flysch formations in the region of Dalmatia. The testing has revealed that the proposed weathering simulation in laboratory can be conducted within acceptable time frames. Because of the observed change of shear strength parameters as related to values corresponding to the strength of material described as soil, it is sometimes necessary to use soil testing devices so as to take into account the load range applied in individual types of testing devices. Mjerenje posmične čvrstoće meke stijene u uvjetima laboratorijski simulirane rastrošbe U radu je opisano određivanje promjene čvrstoće temeljeno na simuliranju procesa rastrošbe u laboratorijskim uvjetima, koristeći uzorke lapora iz flišne formacije s područja Dalmacije. Na temelju provedenih ispitivanja zaključeno je da je predloženi postupak simuliranja rastrošbe u laboratoriju provediv unutar prihvatljivih vremenskih okvira. Zbog uočene promjene parametara posmične čvrstoće na vrijednosti koje odgovaraju čvrstoći materijala koji se opisuje kao tlo, ponekad je potrebno, zbog raspona veličine opterećenja koje se nanosi u pojedinom tipu uređaja, koristiti i uređaje za tlo. Messungen der Scherfestigkeit weichen Gesteins unter im Labor simulierten VerwitterungsbedingungenIn dieser Arbeit wird die Ermittlung von Änderungen der Scherfestigkeit weichen Gesteins aufgrund simulierter Verwitterungsprozesse unter Laborbedingungen an Mergelproben aus den Flysch-Formationen der Region Dalmatien beschrieben. Aufgrund der Untersuchungen geht hervor, dass das vorgeschlagene Verfahren zur Simulation der Verwitterung im Labor in vertretbarem Zeitrahmen durchgeführt werden kann. Bedingt durch den Einfluss von Änderungen der Scherfestigkeite auf die Festigkeit des Materials, das als Boden beschrieben wird, ist es manchmal notwendig bei großen Unterschieden der aufgebrachten Lasten, je nach Gerätetyp, auch Geräte für Bodenproben zu verwenden.

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