EXCAVATION AND CIVIL WORKS FOR UNDERGROUND CABLE LAYING

Clearing and Grading Excavation Routes

The routes of all cable excavations shall be cleared and leveled so that on completion of the works the finished reinstated ground level shall be the same as that which obtained prior to commencement of the Works.

 Foundation Pits Excavates

Excavation for foundations to a greater depth or width than is directed or required shall be made good with concrete or with other suitable material to the satisfaction of the Engineer. No concrete shall be placed until the excavations have been inspected and approved by the Engineer. All replacement of unauthorized excavations shall be to the Contractor expense.

Surface to be Dry

Importances is attached to keeping dry and clean the excavated surfaces upon or against which concrete has to be deposited or built and no concrete is to be deposited until such surfaces are properly drained. Special precautions are to be taken to prevent water from washing out mortar whilst setting or in any way injuring the work. No reinforcement steel shall be placed in water and no water shall be permitted to rise over the reinforcement steel until the concrete has been placed. Blinding concrete shall be placed the same day the excavation is bottomed.

Shoring

The Contractor shall provide to the satisfaction of the Engineer all timbering or other approved supports and shore the sides of excavations, pits, in such a way as will be sufficient to secure them from falling and to prevent any movement. All responsibility connected with such shoring shall rest with the Contractor.

Backfilling and Foundations

Refilling of foundation pits shall be carried out only after the foundations and structural Works within the excavations have been inspected and approved by the Engineer.

Unless otherwise directed all filling shall be approved excavated material and shall be deposited and compacted, using approval

Settlement

The contractor shall be responsible for making well all settlements of filling due to any cause whatever which may occur up to the end of the period of maintenance.

Surplus Material
All material surpluses to the requirements of fill and all debris and rubbish shall be removed and deposited as directed by the Engineer.

Explosives and Blasting
No blasting will be permitted on the site of the works.


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