Selection borrow area—quality fill material see

6 Selection borrow area—quality fill material (see Chapter 5) 

The main purpose of a borrow area is to provide suitable fill material. Generally the required properties of the material can be split up per area or depth below the siuface. High quality fill materials (as may be required for the top layers of a land reclamation) are often referred to as selected fill . Bulk material is referred to as general fill . 

It should be kept in mind that the feasibility of the requirements for the fill material within the reclamation depends on the characteristics of the material encountered in the borrow area. In order to check the feasibility of the Specifications, sufficient geotechnical data collected in the borrow area are required (see Chapter 3 Data Collection). 

The ground investigation indicates that the material dredged from the approach channel and berth pocket used for the core will be predominantly a uniform, fine grained sand. 

The Contractor shall note that the materials are not receptive to selfweight compaction under and above the water level. It is likely to be in a loose state after placement, particularly when placed underwater. There will be a need to undertake some form of ground improvement to ensure that the performance of the finished causeway does not suffer from adverse total and differential settlement and liquefaction under seismic 

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