Pmeee mas

Wale Wetland neg

July, 1987 , 8 872=1125

of che fills. These settlements are also most likely to be highly vari-

able both in magnitude and rare of movement such that significant dif-

ferential settlements can be expected to occur.

Asphalt or similar flexible surfacings such as those for tennis
courts and paved parking facilities can be expected to experience signi-
ficant total and differential settlements with time, tf constructed over
the existing random fills. While treatment of these fills may be consi-
dered, the thickness of Fill zone is expected to result in such creat-

ments as the use of dynamic consolidation being uneconomical.

[Tf flexible asphalt or equivalence surfacings are placed over the
fills, provision should be made for periodic maintenance and future

relevelling of the facilities.

Lightly loaded and compact structures such as washroom facilities
will be similarly affected by settlement of the fill. Consideration may
be given to the design of the structures to accommodate random settle-
ments or to permit adjustments. Alternatively, consideration may be
given to the use of a relatively rigid reinforced slab or mat type of
foundation supporc to prevent local differential settlements within the
Structure. Although some cverall tilting of the structure can be expec

ted, che risk of structural damage will be minimized.

4.2 Area 2 ~ Mult~family Residential Development

v

4.2.1 Foundation Support

-
st

As discussed in Section 3.2, the majority of this area adjacent to
Citadel Drive is underlain by loose fills or disturbed reworked native
soils varying in thickness from 1.3 gm up to a maximum depth of 3.8 m

overlying dense native soils.

20

Golder Associates

ay