00411.00 342 Section 00411 - Pipe Bursting
Description
00411.00Scope - This Work consists of furnishing and installing high density polyethylene (HDPE)
pipe in gravity sewer pipe by the pipe bursting method.
00411.01Submittals - Submit the following at least 10 Calendar Days before the preconstruction
conference.
• Method of pipe bursting, including listed Equipment by size, make, model and manufacturer. Certification that the HDPE pipe meets requirements in ASTM F714. Stamped Working Drawings according to 00150.35 and include the structural design, final design and associated calculations. Installation plan that includes the method of installation, sequencing, lubricant, and temporary modification of existing Structures . Property notification fliers. Sewer bypass and flow diversion plan according to 00490.40. Complete Video Pipe Inspection per Section 00415.
Materials
00411.10Pipe - Furnish high molecular weight, high- density polyethylene pipe and fittings that are
made from virgin grade Material, to the diameter specified, and to toler ances meeting the requirements of ASTM F714 with a minimum ratio of orthogonal diameters, before installation, of 0.95.
following information:
• Name and trademark of manufacturer. • Nominal pipe size. • Dimension ratio. • The letters PE followed by the polyethylene grade according to ASTM D1248, followed by the hydrostatic design basis in hundreds of psi. • Manufacturing standard reference. • A production code from which the date and place of manufacture can be determined.
ratio (DR) of 17.
00411.11Service Connections - Furnish lateral service connections to the sewer main with
manufactured gasket tees, electrofusion saddle tees, or approved equal that provide water -tight connections between the rehabilitated sewer main and the service line connection.
Equipment
00411.20Pipe Bursting, Fusion, and Pipe Assembly Equipment - Use Equipment , approved by
the pipe manufacturer and the Engineer, designed for pipe bursting, butt fusion, and saddle fitting 00411.43 343 welding. Use heating faces that have a non-stick coatin gs. Provide joining Equipment capable of attaining appropriate fusion temperature, alignment, and pressure.
Use manufacturer's recommended pipe bursting tools for the diameter of pipe to be installed, as well as the diameter and Material of pipe to be re placed.
Labor
00411.30Personnel Qualifications - Provide installers that are certified by the manufacturer and
have at least 2 years of experience of butt fusion welding of 8 -inch and larger diameter pipes. Provide a supervisor with the same certific ation as the installers in addition to having installation experience on at least 50,000 feet of 8 -inch and larger diameter pipes.
Construction
00411.40Pipe Joining - Perform joining methods meeting the requirements of ASTM F2620 and the
pipe manufacturer's recommendations, or as approved.
Perform full penetration welds that provide a homogeneous material across the entire Cross Section of the weld. Remove fusion beads greater than 1/16 inch on the inside of the pipe using an approved cutting device. Perform trial fusion welds in the field and provide samples before installation of the pipe. Use the same fusion machine that was used in the trial welds for the final welds incorporated into the Work . Electrofusion may be used for field closures as necessary when fusion Equipment can be utilized in a trench type environment.
Other joining methods may be used if the pipe Material is selected from the QPL.
00411.41Receiving Pits and Insertion Pits - Locate all pits to suit the specified pipe bursting
operation. Use existing manholes where practicable. Remove manhole inverts, benches, and channels to permit access for installation Equipment . Enlarge the input and output pipe openings if required to accommodate the maximum outside diameter size of the insertion Equipment . Do not put undue stress on existing Structures.
In areas where new manholes are not being installed or existing manholes are not available, excavate and restore pits at no additional cost to the Agency.
00411.42Installation - Break existing pipe by utilizing a constant tension system with a hydraulic or
pneumatic bursting device that breaks away the pipe. A static "cone cracking" method may be used if approved. Create a void of sufficient size to accommodate the pipe. Continue pipe bursting and lining without interruption for the entire pipe segment unless otherwise approved. Extend the pipe 12 inches into the manhole or concrete Structure to allow for contraction/relaxation after installation. Do not score or damage the liner pipe during the installation process.
00411.43Connections :
before making the final connections.
slip-on sanded adaptors.
00411.70 344 (c) Service Line - Reconnect all service lines as approved after the air tests have been performed and accepted.
Finishing and Cleaning Up
00411.70Manhole Base Reconstruction - Reconstruct manhole bases by removing the existing
base and constructing a new base with a finished surface no higher than 6 inches below the outside portion of the lowest pipe outflow. Shape new smooth, depression -free channels to the elevation shown. Remove the bottom manhole step as required for the new base. Do not damage existing manhole walls or existing pipes. Repair all cracks with non -shrink grout.
00411.71Testing - Conduct pipe testing according to 00445.72
Measurement
00411.80Measurement - The quantities of pipe bursting will be measured on the length basis. The
length will be measured, with no deduction for Structures or fittings, along the pipe flow line from center to center of manholes, inlets, Structures, special sections, or the ends of pipe, whichever is applicable.
The quantities of service line reconnections will be measured on a unit basis, regardless of size.
Payment
00411.90Payment - The accepted quantities of Work performed under this Section will be paid for
at the Contract unit price, per unit of measurement, for the following items:
Pay Item Unit of Measurement
In item (a), the nominal size of the new liner pipe will be inserted in the blank. Payment will be payment in full for furnishing and placing all Materials, and for furnishing all Equipment , labor, and Incidentals necessary to complete the Work as specified.