Geotechnical Engineering

DHARM

372 GEOTECHNICAL ENGINEERING

by four, by the same principle of superposition; the formula may be generalised by making the
necessary modifications in respect of the reduced dimensions of the rectangle.

m=3

m=¥

m = 0.1

m=0

B

Zs

z

m = B/z

n = L/z

sza=q.l

L q

0.25

0.05

0.10

0.15

Influence factor,

Is

n

0.25

0.20

0.15

0.10

0.05

0.01 1.0 100

Fig. 10.16 Influence factors for verticals stress beneath a corner of a uniformly

loaded rectangular area (After Fadum, 1941)

0 0.05 0.10 0.15 0.20 0.25

2

4

6

8

10

Z/B = /m

I

L/B =I

L/B=2

L/B=5

L/B = 10

L/B =¥

Is=/qsz

Fig. 10.17 Influence values for vertical stress at the corner of a uniformly

loaded rectangular area (After Steinbrenner, 1934)