... locally around a column the steel liner was cut away. A temporary working platform wafsormed by bolting steelwork intopre-drilled holes in the column 3 m below, and then decking over with tplywood. The column was then conventionally Fig. 12. Substructure slab falsework after excavation Fig. 13. Pin-piling...

.... The Contractor was responsible for the diaphragm wall design, which includeda novel use of pin pilesto restrain thewall toe. Consideration was given to relative movements between the wall and structure, to redesign ofthe ground floor for vehicle loading,to support ofthe tower cranes, and to support ofthe...