Abstract
Shear strength parameters used in geotechnical design are obtained mainly from the consolidated drained (CD) or consolidated undrained (CU) triaxial tests. However in many field situations, soils are compacted for construction purposes and may not follow the stress paths in CD or CU triaxial tests. In these cases, the excess pore-air pressure during compaction will dissipate instantaneously, but the excess pore-water pressure will dissipate with time. Under this condition, it can be considered that the air phase is drained and the water phase is undrained. This condition can be simulated in a constant water content (CW) triaxial test. The purpose of this paper is to present the characteristics of the shear strength, volume change, and pore-water pressure of a compacted silt during shearing under the constant water content condition. A series of CW triaxial tests was carried out on statically compacted silt specimens. The experimental results showed that initial matric suction and net confining stress play an important role in affecting the characteristics of the shear strength, pore-water pressure, and volume change of a compacted soil during shearing under the constant water content condition. The failure envelope of the compacted silt exhibited nonlinearity with respect to matric suction.
| Original language | English |
|---|---|
| Pages (from-to) | 411-419 |
| Number of pages | 9 |
| Journal | ASCE J Soil Mech Found Div |
| Volume | 132 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Mar 2006 |
| Externally published | Yes |
ASJC Scopus Subject Areas
- Geotechnical Engineering and Engineering Geology
- General Environmental Science
Keywords
- Pore water pressure
- Shear strength
- Soil suction
- Triaxial tests
- Volume change
- Water content