sugarbare10
Civil/Environmental
I have 5 miles of 70-yr old concrete cylinder pipe (CCP) that has reached its design life. It is a raw(river)water pipeline laid on a uniform grade with drain and air vent valves placed at low and high points. Hydraulic analysis indicates a 22"IPS (17.75 ID) will satisfy our need with the reduced flows anticipated. I am calculating the maximum tension for pulling, with provisions to push pipe as well. I have four questions,
Q-1: Is a 1" annular space enough room to install the HDPE pipe? with or without casing spacers??
Q-2: What is the longest achievable pull distance that can be made given a relatively uniform grade?
Q-3: Video records of the existing pipe interior during pipe repairs show evidence of spalling and a organic film build-up with clam shells scattered throughout. Is there a good mechanical sweeper-device that can sweep the debris out, avoiding a high volume flush of water.
Q-4: Should the annular space be grouted when pipe slip-lining is completed?
Q-1: Is a 1" annular space enough room to install the HDPE pipe? with or without casing spacers??
Q-2: What is the longest achievable pull distance that can be made given a relatively uniform grade?
Q-3: Video records of the existing pipe interior during pipe repairs show evidence of spalling and a organic film build-up with clam shells scattered throughout. Is there a good mechanical sweeper-device that can sweep the debris out, avoiding a high volume flush of water.
Q-4: Should the annular space be grouted when pipe slip-lining is completed?