synthetic water soluble acrylamide-based polymers have wide range of ap-plications  in  the  feld  of  soil  establishment  and  non-desertifcation.  in  this research, the acrylamide-based anionic polyelectrolytes were prepared by  solution polymerization. the polymerization was carried out using aibn as a radical initiator and at different degrees of anionic charges ranging between 10% and 30...

Abstract The authors of the article, on basis laboratory experiments, describe kinematic structure erosion rates water flow in conditions non-cohesive soil lying peceidal canals. A methodology for conducting experiments and analysis results tov research. Dependencies are proposed determining non-eroding taking into account occurrence slopes trapezoidal canal.

This paper is focused on soil subsidence of small extend and amplitude caused by tunnel boring or the collapse of underground cavities, whether natural or man-made. The impact of the movements of the ground on existing structures is generally dramatic. It is therefore necessary to accurately predict these movements (settlements and horizontal extension or compression displacements). Even though...

We present a physically intuitive model of ice-lens formation and growth during the freezing of soils and other dense, particulate suspensions. Motivated by experimental evidence, we consider the growth of an ice-filled crack in a freezing soil. At low temperatures, ice in the crack exerts large pressures on the crack walls that will eventually cause the crack to split open. We show that the cr...

[1] Shallow landslides are a significant hazard in steep, soil-mantled landscapes. During intense rainfall events, the distribution of shallow landslides is controlled by variations in landscape gradient, the frictional and cohesive properties of soil and roots, and the subsurface hydrologic response. While gradients can be estimated from digital elevation models, information on soil and root p...

Failure of dams due to overtopping is among the most frequent forms of embankment failures. Owing to massive and wide spread damage to structures and loss of lives associated with a dam failure, the subject has drawn the attention of scientists. The study also becomes essential for damage assessment and for development of early warning system of people downstream of the embankment. The rate of ...

We have established the cohesive law for interfaces between a carbon nanotube (CNT) and polymer that are not well bonded and are characterized by the van der Waals force. The tensile cohesive strength and cohesive energy are given in terms of the area density of carbon nanotube and volume density of polymer, as well as the parameters in the van der Waals force. For a CNT in an infinite polymer,...

A common practice in civil engineering during earthworks is the usual replacement of cohesive soils (fine soils), excavated earthworks, with non-cohesive (coarse soils). Until recently, such a procedure was dictated primarily by economic and technical reasons. From an point view, ease access therefore low cost using instead crucial. The reason is, above all, compacting fine (as opposed to soils...

The paper analyzes the problem of initial compaction a non-cohesive soil sample on example dry silty sand samples. Two different methodologies were used: I) dynamic - using split Hopkinson pressure bar and II) vibration vibrating shaker. A better result process was obtained for with an value 0.5 (small difference in both methods comparable results). also includes numerical analysis calibration ...