A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Revisiting Lateral Earth Pressures for Retaining Wall Backfilled with Unsaturated Soil
https://orcid.org/0000-0003-3526-5116
Abstract The objective of this article is twofold: (a) reformulating the conventional expression of the suction stress and (b) reexamining the earth pressure in unsaturated backfills based on the newly-developed suction stress expression. Since its inception in the early twenty-first century, the concept of suction stress has been effectively used in many geotechnical stability analyses by combinedly employing the restricted version of the van-Genuchten’s soil–water-characteristics-curve (vG-SWCC) and Gardner’s one-parameter hydraulic conductivity function (HCF). Traditionally, the asymmetry parameter of the vG-SWCC model follows a strict relation with the pore spectrum number. An attempt has been made to relax this constraint and treat all the vG-SWCC model parameters independently. Furthermore, the pore spectrum-based Gardner’s HCF model is incorporated by adopting suitable numerical iterative schemes. By using the independent vG-SWCC parameters and Gardner’s one/two parameters dependent HCF model, the three states of earth pressures (at-rest, active, and passive) are extensively studied and critically scrutinized for hydrostatic as well as steady-state infiltration and evaporation. The independence of SWCC model parameters impacts the earth-pressure profiles to a significant extent, especially while soil dries up. On the other hand, one-parameter Gardner's model appears to be more effective and flexible than its two-parameter counterpart.
Revisiting Lateral Earth Pressures for Retaining Wall Backfilled with Unsaturated Soil
https://orcid.org/0000-0003-3526-5116
Abstract The objective of this article is twofold: (a) reformulating the conventional expression of the suction stress and (b) reexamining the earth pressure in unsaturated backfills based on the newly-developed suction stress expression. Since its inception in the early twenty-first century, the concept of suction stress has been effectively used in many geotechnical stability analyses by combinedly employing the restricted version of the van-Genuchten’s soil–water-characteristics-curve (vG-SWCC) and Gardner’s one-parameter hydraulic conductivity function (HCF). Traditionally, the asymmetry parameter of the vG-SWCC model follows a strict relation with the pore spectrum number. An attempt has been made to relax this constraint and treat all the vG-SWCC model parameters independently. Furthermore, the pore spectrum-based Gardner’s HCF model is incorporated by adopting suitable numerical iterative schemes. By using the independent vG-SWCC parameters and Gardner’s one/two parameters dependent HCF model, the three states of earth pressures (at-rest, active, and passive) are extensively studied and critically scrutinized for hydrostatic as well as steady-state infiltration and evaporation. The independence of SWCC model parameters impacts the earth-pressure profiles to a significant extent, especially while soil dries up. On the other hand, one-parameter Gardner's model appears to be more effective and flexible than its two-parameter counterpart.
Revisiting Lateral Earth Pressures for Retaining Wall Backfilled with Unsaturated Soil
https://orcid.org/0000-0003-3526-5116
Abstract The objective of this article is twofold: (a) reformulating the conventional expression of the suction stress and (b) reexamining the earth pressure in unsaturated backfills based on the newly-developed suction stress expression. Since its inception in the early twenty-first century, the concept of suction stress has been effectively used in many geotechnical stability analyses by combinedly employing the restricted version of the van-Genuchten’s soil–water-characteristics-curve (vG-SWCC) and Gardner’s one-parameter hydraulic conductivity function (HCF). Traditionally, the asymmetry parameter of the vG-SWCC model follows a strict relation with the pore spectrum number. An attempt has been made to relax this constraint and treat all the vG-SWCC model parameters independently. Furthermore, the pore spectrum-based Gardner’s HCF model is incorporated by adopting suitable numerical iterative schemes. By using the independent vG-SWCC parameters and Gardner’s one/two parameters dependent HCF model, the three states of earth pressures (at-rest, active, and passive) are extensively studied and critically scrutinized for hydrostatic as well as steady-state infiltration and evaporation. The independence of SWCC model parameters impacts the earth-pressure profiles to a significant extent, especially while soil dries up. On the other hand, one-parameter Gardner's model appears to be more effective and flexible than its two-parameter counterpart.
Revisiting Lateral Earth Pressures for Retaining Wall Backfilled with Unsaturated Soil
Sarkar, Sourav (author) / Shingwekar, Eshwaree (author) / Chakraborty, Manash (author)
2023
Article (Journal)
Electronic Resource
English
BKL:
57.00$jBergbau: Allgemeines
/
38.58
Geomechanik
/
57.00
Bergbau: Allgemeines
/
56.20
Ingenieurgeologie, Bodenmechanik
/
38.58$jGeomechanik
/
56.20$jIngenieurgeologie$jBodenmechanik
| British Library Conference Proceedings | 2000
| Taylor & Francis Verlag | 2022