CO129-477 - Public Offices - 1922 — Page 114

Sit

113

which ample material of excellent quality is conveniently

available, both in regard to the stone and sand required

for the aggregate and also the Portland cement, excellent

cement being procurable from the Green Island Cement Works

st KowloGR.

In this connection we may say that we have

considered alternative methods for the construction of the

quays, both in reinforced concrete and steel, but when the

usssssary prevision is made for retaining the filling at

the back there is no saving in cost. On the other hand

such structures are specially subject to deterioration.

involving considerable maintenance costs, whereas with a

solid concrete block wall the contrary is the case.

have, therefore, no hesitation in recommending this form of

construction.

From a examination of the samples of the

berings which we have received, and consideration of the

conditions under which the prickings were carried out, we

are of opinion that satisfactory foundations will be

obtainable throughout at a fairly reasonable depth.

Dealing with Jetties Nos. 1 and 2, it would appear that the foundations of the landward portions of the deep water

qusy works will be dirsetly upon the material described

as "hard as derived from berings". Fassing seaward the

depth at which this material is found increases and at

the outer and of the works and for some distance shorewRTÓS

would be at too great a depth to be reached by the solid

blackwork of the walls. Over this longth we would propese

to dredge a trench in the material described as "hard as

derived from prickings", within which rubble stone would

be deposited brought up to the level required for the

--20--

7%