TNAG-0273-FCO40-309-Scheme-for-development-of-container-terminal-at-Hong-Kong-1970 — Page 37

~33.0°

~40.0°

Cellular Steel Sheet Piling

7.26 Description. A cellular bulkhead is formed by flat-type steel sheet piling driven into firm strata. The soft clay within the cells is removed and replaced by decomposed granite and/or rock. The container-crane-rail beams are carried by hollow circular prestressed-concrete piles driven prior to filling the cells.

+14.25′′

M.H.H.W. +7.1^

MILL.M. +2.0ʻ. 0.00, 0.0.

CONTAINER=CRANE TRACK SOʻ GAUGE

IN TOO

HOLLOW CIRCULAR

FLAT-TYPE STEEL

PRESTRESSED CONC. PILES

SHEET PILING

SHEET-PILING CELL

GRANULAR

FILL

APPROX. EXISTING SEA BED -28.0

50FT

CLAY

-10.0"

-70.0

COMPACT SOIL

RECLAMATION

FILL

SOFT CLAY

7.26

7.27 Advantages:-

7.28

7.29

7.30

(a) It should be a rapid and easy form of construction.

(b) Various container-crane gauges within limits can be used and crane-rail settlement

is virtually eliminated.

(c) It does not require as much dredging as the other schemes where the depth of soft

material is great.

Disadvantages:—

(a) Cathodic protection is required to prevent corrosion of the sheet piling.

(b) The amount of reclamation material needed is more than for the other forms of

structure considered.

Order of Cost. From $10,000 to $13,000 per ft. run of berth depending partly on length of pile required.

Suitability. Particularly suitable for areas where the depth of soft material overlying the firm strata is great.

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