.:
ghezi san donwat al
.:
:
#14 10 angola akla saf
no vitserib bəhrəət mand and C
mið da omah gilawa
A
LED THE
Zo ed JuuNE
J
B
1
Le Ty maker - då puteapo
J3
JAY
stle akit to
+
nt bras Brð
6957-5
below L.V.0.8.7. - in accordance with which a length of
about 170 feet was completed before the all-rubble type of
foundation was adopted - is we consider satisfactory and
preferable to his first design, and the passage of vater
to and from the back of the wall would readily take plase
through the upper 13 feet of the foundations composed of
quarry spalls and rubble, without disturbance of the sand
beneath.
14. Replying them to points (a) and (b); we are of
opinion that sand, of the quality of the sample forwarded,
may be used satisfactorily and economically in the quay wall
foundations at this site in severdance with kir, Dunoan's
modified design, subject to the sonditions that the minimum
bettem width of the dredged trench is as indiosted on
drawing - P, that the coating of quarry spalla be every-
where extended fully to cover the surface of the sand filling
in the trench, and that a minimum width of apron of 50 feet
in front of the wall be carefully maintained with full
thicknesses of rubble above to the extent and of the sizes
described in the sixth paragraph of Mr. Baker's memorandum.
16. The all-rubble type of design which has now been
adopted provides less width of protection in front of the
vall and would appear to be mere destly. Moreover,
should anticipate the settlement of the blockwerk vall above
to be greater than in the case of the wall constructed en a
foundation of which the lower portion is sand.
16.
In reply to point (e), we consider that if the
rubble backing is deposited and the filling consolidated
behind the wall to the level of the top of the blockwork
before the superstructure is built, it will be unnecessary
to load the substructure in the manner suggested over those
lengths of the wall the foundations of which have been