5. GROUND TREATMENT TO CHANGE THE PHYSICAL PROPERTIES OF THE GROUND

A number of methods are available as follows:
    (a) Removal and replacement of the weak strata with strong compact
        material. It is necessary to check the compatibility of the proposed
        fill material with the existing chemical ground conditions.
    (b) Compaction of soils in-situ by vibro compaction or dynamic
        compaction.
    (c) Pre-consolidation of soil by pre-loading the site with imported fill.
        Check compatibility of fill material as in (a) above.
    (d) Injection of grout into the ground.
    (e) Construction of in-situ diaphragms.
    (f) Removal of water by sand drains and drainage wicks.
        All these are operations normally carried out by specialist subcontractors.
        See your Company Standing Instructions or 'Procedures for recording work in progress.