To extend the work period and shoulder half of the expenditures of the additional work in the event of unforeseen difficult ground condition in piling work performed according to the contractor s design 又或在打樁工程按承建商的設(shè)計(jì)進(jìn)行而遇到不可預(yù)知復(fù)雜巖土的情況時,房委會會予以延長施工期,并承擔(dān)相關(guān)額外工程支出的半數(shù)。