EK517
Because the deformations of soils are mostly due to changes in the particle assembly, by sliding and rolling of particles, it can be expected that after unloading a soil will […]
EK509
Effective friction angle is a measure of the shear strength of soils due to friction.
EK508
The settlement of non-draining soils consists of three parts: Elastic compression (short term; occurs during construction). Primary consolidation (long term; occurs during the design life of the structure). Secondary compression […]
EK507
There are two common modes of settlement of non-free-draining soils (fine-grained soils, fine sand, and medium sand with fines greater than 10%). One is the natural drainage of water from […]
EK506
The settlement of free-draining coarse-grained soils (e.g., medium sand with fines less than 5%, clean, coarse sand) is generally calculated assuming that these soil behave as elastic materials.
EK505
Because of the variability of soils and the complexity of their behavior, it is difficult to estimate settlement unless simplifying assumptions are made. One of these assumptions is that the […]
EK503
Coarse sand with fines >10%, fine sand and medium sand are not free-draining. Settlement in these soils can occur well beyond the construction period.
EK502
Compaction is the densification of soils by the expulsion of air.
EK501
The time dependent settlement or densification of soils, essentially fine-grained soils, by the expulsion of water from the voids is called consolidation.
EK500
The time rate of settlement of coarse-grained and fine-grained soils is different. Free draining, coarse sand and gravel with fines <5% generally have good drainage qualities (high hydraulic conductivity), so […]
EK493
Consolidation is the time-dependent settlement of soils resulting from the expulsion of water from the soil pores.
EK490
Soils, especially silts and fine sands, can be affected by capillary action. Capillary action results in negative porewater pressures (suction) and increases the effective stresses.
EK487
Soils cannot sustain tension. Consequently, the effective stress cannot be less than zero.
EK482
Deformations of soils are a function of effective stresses, not total stresses.
EK457
The lateral load capacity of a specific pile type can be most effectively increased by increasing the diameter, i.e., the stiffness and lateral-bearing area. Other steps are to improve the […]
EK454
Influenced by consolidation induced by placement of fill and/or lowering of the water table, soils along the upper portion of a pile will tend to compress and move down relative […]