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| Full text | |
| Author(s): |
Rocha, Breno Padovezi
[1]
;
de Carvalho Rodrigues, Andre Luis
[2]
;
Rodrigues, Roger Augusto
[2]
;
Giacheti, Heraldo Luiz
[2]
Total Authors: 4
|
| Affiliation: | [1] Fed Inst Sao Paulo IFSP, Adv Campus Ilha Solteira, 164 Tucurui Ave, BR-15385000 Ilha Solteira, SP - Brazil
[2] Sao Paulo State Univ, 14-01 Eng Luiz Edmundo Carrijo Coube Ave, BR-17033360 Bauru, SP - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | INTERNATIONAL JOURNAL OF CIVIL ENGINEERING; DEC 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
Collapsible soils are unusual geomaterials found in several regions of the world. These soils undergo sudden and large volumetric compressive deformations upon wetting under constant loading. It is a problematic soil that must be identified in the first step of a site investigation. The seismic flat dilatometer (SDMT) has been used by the geotechnical community as a logging tool for site characterization. It provides several parameters and can be used to identify collapsible soil. A database with in situ and laboratory tests at 24 sites where collapsible and noncollapsible soils occurred was assembled. Seismic flat dilatometer (SDMT), flat dilatometer (DMT) and seismic data were reviewed and interpreted to define a qualitative approach to identify collapsible soils using the maximum shear modulus (G(0)), constrained modulus (M-DMT), material index (I-D) and horizontal stress index (K-D). In the database of investigated soils, collapsible soils were found to have G(0)/M-DMT values above 10 and K-D values below 4, while noncollapsible soils had G(0)/M-DMT values below 10 and K-D values above 4. Collapsible soils show an increase in G(0)/M-DMT when I-D increases, while the opposite occurs for noncollapsible soils. The G(0)/M-DMT versus K-D chart and boundaries were used to differentiate between collapsible and noncollapsible soils. This qualitative approach is intended to be used during preliminary investigation to identify potentially collapsible soils and select those to be tested in the laboratory. (AU) | |
| FAPESP's process: | 15/17260-0 - Seismic DMT for site characterization of tropical soils |
| Grantee: | Heraldo Luiz Giacheti |
| Support Opportunities: | Regular Research Grants |