Vibratory ground improvement techniques

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4.5.2Hazardous sites and ground hazards

Vibratory ground improvement techniques on hazardous sites shall be reported to NHBC before work on site commences, and be designed to take account of the characteristics of the site, including any ground hazards.

Hazardous sites, as defined in the NHBC Rules, should be reported to NHBC in writing at least eight weeks before sitework begins.

Details of ground hazards to be taken into consideration are given in Chapter 4.1 ‘Land quality ­– managing ground conditions’ and Chapter 4.2 ‘Building near trees’.