A square flexible foundation of width B applies a uniform pressure q_o to the underlying ground. Determine the vertical stress increase at a depth of B/2 below the center using:

a. Δ_σ beneath the corner of a uniform rectangular load [Eq. (8.10) and Table 8.5],

b. 2:1 method [Eq. (8.15)], and

c. Stress isobars (Figure 8.11).

Eq. (8.10)

Eq. (8.15)

Table 8.5

Figure 8.11

Transcribed Image Text:

ar-に 39. (dx dy)z 27(x + y? + z?)5/2 7. 3 Aơ y=0x=0