Page 28 - SMM2 eBOOK

E.8 Quantities (cont’d)

b. The driven or bored depth of each pile shall be measured from the level stated in
accordance with clause E.3 to the bottom of the toe, to the bottom of the driven casing or
to the bottom of the bored shaft, The measurement for the total driven depth includes for
driving extended piles.
c. The concreted length measUred for cast-in-place piles shall be from cut -off level
specifically reqUired to toe level specifically required and shall include enlarged bases
d. The areas measured for interlocking steel piling shall be based on the mean length
measured on the centre line of the piling, over all corner, junction, taper and closure piles.
e. The measurement of pile extensions shall not include lengths formed of material arising
from cutting off surplus lengths of other piles. It shall deem to include the work necessary
to attach the extension to the pile.
f. Disposal of surplus excavated material including surplus piles arising from piling
operations shall be deemed to be included with the piling items.

Diaphragm walls

E.9 Information

1. Drawings shall be supplied with the bills of quantities which show:

a. The arrangement of diaphragm walls and their relationship to surrounding buildings.
b. The depths. lengths and thickness of diaphragm walls.

E.10 Soil description

The nature of the ground shall be given in accordance with clause D.1.1.

E.11 Plant

1. An item shall be given for bringing to site and removing from site all plant required for this
section of the work.

2. An item shall be given for maintaining on site all plant required for this section of the work.

E.12 Diaphragm wall description

1 Items for work in diaphragm walls shall be grouped together under an appropriate
heading.
2. Excavation for diaphragm walls shall be given in cubic metres stating the thickness of the
wall and maximum depth. Details of support fluid shall be given in the description.

3. The volume of excavation shall be calculated from the nominal lengths and depths of the
walls. The depths shall be taken from the level at which the work of excavation is
expected to begin and in accordance with clause E.3. Additional excavation to
accommodate guide walls or to provide working space and disposal of material so
excavated shall be deemed to be included.

4. Excavation in rock and excavation in artificial hard material shall each be given sepanately
in cubic metres stating the nature of the anticipated strata and of the material.
Alternatively such work shall be given as extra over the excavation.

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