Page 29 - SMM2 eBOOK

E.12 Diaphgram wall description (cont’d)

5. Disposal of excavated matefials shall be given in cubic metres in accordance with clauses
D.18 and D.19.

6. Concrete in diaphragm walls shall be given in cubic metres stating the wall thickness and
the specification of the concrete mix. The depth use in calculation of volume shall be
measured from the levels speciflcally required. The volume of concrete measUred shall
include that occupied by reinforcement, other metal sections, cast-in components each
less than 0.10m3 in volume, rebates, f llets and internal splays each less than 0.005m3 in
cross-sectional area and pockets and holes not exceeding 0.50m2 in cross-sectional area.

7. Trimming and cleaning the faces of diaphragm walls shall be given in sqUare metres
stating the finish required.

8. Reinforcement for diaphragm walls shall be given in accordance with Section F. The
weight of reinforcement measured shall include the additional weight of stiffening, lifting
and supporting steel cast in.

9. Waterproof joints in diaphragm walls if specif cally required shall be fully described and
given as an item.

10. Guide walls for diaphragm walls shall be given in metres measured as the length of
diaphragm wall constnucted and stating any limitations on the design and construction of
the guide walls.

l l. Prepafing the tops of walls and reinforcement to receive cappings shall be given in metres
stating the thickness.

12. Ancillary work in connection with diaphragm walling shaD be given as follows:

a. Preparing cast in pockets or chases at junction shall be given in metres or
altematively as an item stating the details required. Removal of formwork and
preparing cast in reinforcement shall be deemed to be inciUded with the item.
b. Removal of gUide walls shall be given in metres stating the limitation on method of
disposal. Removal of gUide walls is deemed to inciUde disposal.

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