Modify Equation Settlement For Free

Analysis of the behaviour of the ideal two-phase soil may also be used to indicate the likely importance of immediate settlement. The immediate or undrained settlement, S,, will be given by elastic displacement theory by putting E = E, = 3E'/2(1 +v') and v = vu = 0.5.

In the current state of practice, any soil settlement other than consolidation settlement is often called elastic settlement. It is also referred to as immediate settlement in some geotechnical reports.

The settlement of soils in response to loading can be broadly divided into two types: elastic and time-dependent settlement. Elastic settlements are the simplest to deal with; they are instantaneous, recoverable, and can be calculated from linear elastic theory.

H = Thickness of the field consolidating stratum at the end of primary consolidation. Commonly initial thickness is used unless the primary consolidation is very large. Say more than 10% of initial thickness. t2 = t100 (f) + ?t = time for which secondary settlement is to be calculated.

The settlement-generating base stress ?1 = ?0 - ? ? h must be used, taking into consideration the stress reduction by the excavation unloading for the embedment depth of the foundations. the stress-dependent constrained moduli of the soil layers.

Based on the solution using Schmertmann's method (1978) using strain influence factor with integration, the settlement is calculated for each layer as the following: With total elastic settlement: Si=0.916x1. 4x3425x5. 506x10-5=0.24183ft = 2.88 inches.

Elastic settlement calculation using displacement influence factors has the general form (Poulos and Davis, 1974):(1) ? = q B E s I where ? is the foundation settlement; q is the applied stress; B means the foundation width; Es stands for the equivalent elastic soil modulus; and I is the displacement influence factor.