AL Sewer Projects Practice Questions - Alabama Sewer Projects Contractor Examination Exam

What is the purpose of compacting trench backfill in lifts (layers)?

To leave large voids for future pipe settlement To achieve specified density throughout the backfill and reduce future settlement of the surface To avoid using any bedding material To increase the pipe diameter

Correct Answer:

To achieve specified density throughout the backfill and reduce future settlement of the surface

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