Constant suction direct shear test enables the understanding of failure mechanism in rainfallinduced landslides. It can be conducted using a conventional apparatus with some modifications. The constant is carried out two stages. In first stage, unsaturated soil specimen consolidated to target net normal stress and matric then sheared second stage. Matric usually controlled axis-translation prin...

Bearing capacity of single piles are occasionally predicted using the renowned theoretical methods (α and β methods). These based on laboratory tests, which can be time-consuming, but also applicable in foundation engineering practice for unsaturated soils. Full-scale pile load tests were carried out bored equipped with Expander Body Systems Federal District Brazil, known its unsaturated, colla...

Both osmotic and matric suction changes have a significant influence on the mechanical behaviour of clays. Despite different types interactions at microstructural level, both suctions havea relevant effect fabric non-expansive Starting from experimental observations laboratory scale, it is possible to identify some common features characterizing response clays salinity degree saturation changes...

Traditional landslide hazard assessment methods generally use the same evaluation model to carry out assessments under different working conditions. Due differences in influence factors and calculation considered conditions, results obtained using traditional are from those of real-world scenarios. Therefore, research on optimal for conditions is important disaster prevention mitigation areas a...

Affected by climatic conditions such as rainfall, evaporation and air temperature, most of the backfill soil is in an unsaturated state, decrease matric suction leads to failure retaining structure. In view this, this study takes vertical rigid wall with narrow research object, assuming that behind forms a circular arch considering interlayer shear stress; thus, analytical solution active earth...

Exposed geo−infrastructures filled with compacted soils experience cyclic wetting–drying effects due to environment and underground water fluctuations. Soil physical mechanical behaviors are prone deterioration a great extent, e.g., swelling, collapse, or even slope failure, resulting in huge losses human life, safety, engineering construction. In this paper, hydraulic loading tests of cycles w...

The paper investigates the deformation behaviour of partially saturated clay beams under flexural stress. Beams were prepared from two clays and then loaded until failure. Three degrees saturation loading rates examined for each clay. load, matric suction at different beam points, deflection in middle measured during tests. device ensures an even distribution stresses on top surface beam, which...

High capacity tensiometers (HCT) are the only type of sensors in existence that can measure soil matric suction directly and regarded to be most accurate reliable technique for study evolution unsaturated soils. The measurement with HCTs is possible due their design, composed ceramic filter a specific air entry value (AEV), small water reservoir, pressure transducer. Where, AEV filter, more pre...