Geotechnical Engineering

DHARM

616 GEOTECHNICAL ENGINEERING

8.

Medium dense sand extend-

ing to great depth

Best solution is deep foun-

dation. Cast-in-place type

piles such as auger-piles or

bulb piles into sand layer

may be appropriate.

9.

or

Rock

Deep foundations extend-

ing into medium dense sand

or preferably into glacial

till. Drilled pier with bell in

the till. Also, cast-in-place

or driven concrete pile or

pipe pile may be used.

10. Deep foundations penetrat-
    ing through fill are appro-
    priate. With piles or piers,
    it is better to stop in the
    upper zone of sand layer to
    limit compression of clay
    layer. Spread footings may
    be used if the proper fill is
    replaced with compacted
    fill.

or

Rock

Newly

compacted fill

11.

or

For light

to medium

loading

or

For

heavy

loading

Piles or piers bearing in the

upper zone of sand layer

may be used, if settlement

expected is not high and

loading is low to medium

heavy. For heavy loads,

driven steel piles or cais-

sons to rock are appropri-

ate. Floating foundations

may also be considered.

(Contd.)...

6 m Soft clay

or

Auger

pile

Bulb type

pile

3 m Miscellaneous fill

10 m Medium dense sand

17 m Medium firm day

Rock

3 m Miscellaneous fill

2 m Loose sand, soft

clay organic mantle

2 m Medium dense sand

11 m Compact glacial till

Rock

12 m Soft clay

6 m Medium dense sand

27 m Soft caly

Rock