METHOD OF STATEMENT OF UNDERGROUND PIPE INSTALLATION

METHOD OF STATEMENT OF UNDERGROUND PIPE INSTALLATION

Summary: This Method of Statement includes all the underground sewer pipe installation.

1. Procedure

Excavate trenches to provide a clearance 200mm on each of the pipe.
Bedding to be compacted in layers not exceeding 150mm to give uniform bed.
Lay the pipe directly on the bedding.
The pipes must be installed as indicated on the approved shop drawing with the required invert level and proper slope using the approved materials and fittings.
Trench is not to be open too far in advance of pipe laying and then backfilled as soon as possible (24 hours max.)
Use fine sand and compact fill firmly between the side of the pipe and the trench.
Brick or hard materials under the pipe are not allowed to be used.
Provide a warning tape along the pipe and below the upper layer of the sand.
Until the crown of the pipe is covered by at least two feet of a tamped sand, considerable care shall be exercised in the back filling of trenches.
The underground pipe must comply with the manufacturer recommendations for laying the underground pipes.