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

Abstract

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.

Determination of hydraulic conductivity and shear strength properties of unsaturated residual soil from flysch rock mass

“…The obtained results indicate that, as it SWRCs [22], saturated hydraulic residual soil from flysch rock mass measured on remoulded instead of int 8). For a similar void ratio, k s measured was the case with conductivity of differs greatly if act samples ( samples was approx.…”

“…The last 2016, at the SW Lake [21]. This rea for the new the importance of andslides in flysch esidual soil, taken ide body, showed as similar features n and Atterberg's n clay (CL) [22]. the sampling pit i landslide.…”

“…The formation process of the resid slopes of the valley results with t structure, characterized by the occasi macro voids and siltstone grains that ca weathering degree. Measurements for the SWRC showed that different SW when remoulded and consolidated sa instead of intact ones [22]. Best-fit SW intact soil are summarized in Table 2.…”

Conditions and triggers of landslides on flysch slopes in Istria, Croatia

“…It presents a complex of clastic sedimentary rocks originating from the muddy flows and submarine sliding of deposits [4], known as submissive to weathering and significant change of physical-mechanical properties in short time. For more detail description of the mentioned sedimentology rocks and understanding of these formations, several important researches can be recommended: [5][6][7][8][9][10][11], while problems of sliding in flysch deposits at the Istrian Peninsula are described in [12][13][14][15][16][17][18][19][20][21][22]. The area of north-eastern Istria has a lithological composition and structural-tectonic fabric, which differ from other areas of the large flysch pool spreading from Gorizia (Italy) all the way to Albania [23].…”

Determination of Uniaxial Compressive Strength of Limestone

“…On the other hand, there are frequent rockfalls on cuts along the roads, causing problems and demanding certain stabilization measures, as well as deep seated landslides in the area of carbonate-flysch geological contact [3]. The focus of the present studies in the wider area of the testing locations (Vinodol and Rječina River Valley) are the instability phenomena [4][5][6][7][8][9] and some flysch rock mass properties closely related to landslide initiation, such as weathering in relation with the strength reduction [10,11] and hydromechanical properties related to precipitation amounts [12,13]. However, UCS values of limestone in the coastal area of Croatia are mostly parts of the geotechnical designs, related to rock mass engineering, unavailable for the public, and in the interest of this research.…”