DRAINAGE AND FOUNDATIONS..pdf
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DRAINAGE
AND FOUNDATIONS.
BY
W.
J.
MERRETT,
County
Surveyor,
Durham.
FOREWORD.
T
HE
drainage and foundation of any highway
is
of paramount importance, for unless con-
siderable
care and forethought is given, the
completed
road will not prove successful. It should
be
borne in mind that the length of
life
of any type
of
wearing surface
depends
entirely
upon
the stability
of
its foundation. The provision of adequate drain-
age
of the sub-strata and surface water is equally
important and every care in the design and con-
struction must be taken.
To
arrive at the type to be utilised a considerable
number of factors have to be taken into considera-
tion, and the Engineer must
adopt
the method of
construction
to meet the situation. Amongst these
would rank the initial cost, maintenance costs, types
of
materials to be used, the utilization of local
material if satisfactory, drainage, the situation of
the Highway whether it be of
rural
or industrial
character,
the anticipated volume of traffic, and the
type of user. Also an important factor would be
anticipating the possible changes of conditions, such
as increased volume of traffic for the highway to bear.
Full
consideration must also be given to the financial
32
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