Naslov
A Mass-Conservative Numerical Solution for Finite-Strain Consolidation during Continuous Soil Deposition

Autori
Gjerapic, Goran ; Znidarcic, Dobroslav

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

Izvornik
Proceedings of the Geo Institute Congress / Siegel, Timothy C. ; Luna, Ronaldo ; Hueckel, Tomasz ; Laloui, Lyesse - Denver (CO) : ASCE Publications, 2007, 1-10

ISBN
0-7844-0901-3

Skup
Geo Institute Congress, Geo-Denver 2007.

Mjesto i datum
Denver (CO), Sjedinjene Američke Države, 19.02.2007. - 21.02.2007

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Numerical models; Soil consolidation; Strain; Wetlands; Dredging; Hydraulic fill; Sediment deposits

Sažetak
Consolidation of accreting soft soils is a topic of significant interest for engineers dealing with mine tailings deposition, hydraulic fills, dredging deposits, and wetland construction. In these cases, the classical Terzaghi's theory often fails to produce satisfactory solutions due to variations in compressibility and permeability under large deformations. The finite-strain theory introduced by Gibson allows for the non-linearity of material properties and provides an accurate description of soft soil deposits undergoing large displacements. Numerical accretion models based on Gibson's theory need to account for both the non-linearity of the governing equation and the continuous domain change. This paper investigates the numerical performance of several one-dimensional finite-difference schemes with different time-stepping algorithms and mesh discretization procedures. An optimal mass-conservative scheme is selected and implemented into a numerical model. The presented field example demonstrates that the employed mapping technique ensures both mass and water conservation, essential for water balance and storage capacity prediction in slurry disposal projects.

Izvorni jezik
Engleski

Znanstvena područja
Rudarstvo, nafta i geološko inženjerstvo

POVEZANOST RADA