国外电力工程土建设计要求-变电站

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国际电力工程土建设计要求
All material excavated under this Contract shall be disposed of in accordance with the
instructions issued by the Project Manager. Selected material required for back-filling shall
be removed to a tip found by the Contractor and the Contractor shall ensure that the
required amount of spoil is set aside.
S8.8.1.7 OTHER SERVICES
Where trenches pass near or across other services， the Contractor shall take every
precaution against damaging such services. These services shall be properly supported in
the trench until backfilling is complete and the backfilling shall be thoroughly compacted
under and around such services.
S8.8.1.8 BACKFILLING
Backfilling shall be carried out either with selected spoil as set aside， or with imported
selected spoil， or with crusher run， or where specified， with gravel of 38 mm nominal size to
B.S.C.P. 2006 Table 4.
No backfilling shall be done until all the formwork has been removed together with pieces of
timber， cement bags， vegetation and/or other rubbish.
All backfilling shall be compacted in layers not exceeding 150 mm thick and shall be
sprayed with water to bring the moisture content to the optimum for dense compaction.
Compaction shall be such as to achieve a minimum of 91% H.C.E. density up to 300 mm
below pavement level， and a minimum of 98% above this level up to the underside of the
pavement. Compaction shall be tested by a Testing Laboratory.