538.03 Construction Requirements.
536.05 Basis of Payment.
a.Unit Price Coverage .
1.The accepted length of relaid culvert pipe, measured as noted above, will be paid for at the contract unit price bid for either roadway pipe relaid or side drain pipe relaid, regardless of size or type of pipe. Said unit costs shall be full compensation fo r the salvaging of the pipe in conditions for reuse and the re -installation of the pipe in accordance with the provision for roadway pipe as covered by Section 530 and Section 535 for side drain pipe including all equipment, tools, labor, and incidentals necessary to complete the work.
2.No payment will be made for the removal of existing pipe lines replaced by new or relaid pipe, except for that portion of the old pipe removed outside the limits of excavation provided by Subarticle 214.04(a).
b.Payment will be made under Item No .: 536-A Roadway Pipe Relaid - per linear foot {meter} 536-B Side Drain Pipe Relaid - per linear foot {meter} ROADWAY PIPE REHABILITATION
538.01 Description.
This Section shall cover the work of rehabilitating roadway pipe using a cured -in-place liner, polyethylene (PE) liner pipe, or a liner shown on the plans, at the locations shown on the plans or directed by the Engineer.
538.02 Materials.
a.Cured -in-Place Liner. Cured -in-Place Liner material shall be a lining system selected from List II -32 of the Department’s MSDSAR . All cured -in-place lining products shall comply with ASTM F -1216, "Rehabilitation of Existing Pipelines and Conduits by the Inversion and Curing of a R esin-Impregnated Tube", ASTM F -1743, "Rehabilitation of Existing Pipelines and conduits by Pulled -in-Place Installation of Cured -in-Place Thermosetting Resin Pipe (CIPP)", or ASTM F -2019 “Rehabilitation of Existing Pipelines and Conduits by the Pulled in P lace Installation of Glass Reinforced Plastic (GRP) Cured -in-Place Thermosetting Resin Pipe (CIPP), including appendices. The liner shall be a flexible tube fabricated to a size that, when installed, shall fit the internal circumference of the existing ro adway pipe. Allowance shall be made for circumferential stretching during insertion so that the final cured product is snug against the wall of the host pipe. The material shall be able to stretch to fit irregular pipe sections and negotiate bends. Any com pounds, process water or condensate used during the installation or curing operation shall be contained, removed from the site and disposed of in a manner approved by the Engineer.
b.PE or HDPE Liner Pipe. Polyethylene or high density polyethylene liner pipe shall be selected from List II -32 of the Department’s MSDSAR .
c.Liner Shown on the Plans. Any liner shown on the plans may be used as an alternate to cured -in-place liner or PE liner pipe. The material requirements for alternate liners will be show n on the plans.
d.Minimum Length of Liner. The minimum length of liner material shall span the distance from the inlet to the outlet of the pipe, unless required otherwise by the Engineer or shown otherwise on the plans.
538.03 Construction Requirements .
a.Submittals. The Contractor shall submit eight copies of the product data and installation procedures of the cured -in-place liner, or PE liner pipe for review and distribution. The product data for PE liner pipe shall include actual certified test reports meeting AASHTO M 326. The submittal of the product data
538.03 Constru ction Requirements.
and installation procedures shall be complete to the point that the physical properties of all required materials are identified and all installation procedures and containment and disposal measu res are thoroughly described. An incomplete submittal will be returned to the Contractor for completion. Polyethylene liner pipe shall be installed in accordance with the requirements given in ASTM F 585, "Insertion of Flexible Polyethylene Pipe into Exist ing Sewers". The Contractor shall submit these procedures and the proposed nominal pipe size as specified in AASHTO M 326 and the standard dimension ratio (SDR) of pipe required as specified in ASTM F 585. The annular space between the PE liner pipe and the original pipe shall be shown on the submittal as being filled with a low density grout or concrete. The proposed mix design for the low density grout or concrete shall be shown on the submittal. The submittal shall be delivered to the Project Engin eer. The Project Engineer will review the submittal for completeness and then forward the submittal to the ALDOT Construction Engineer. The Construction Engineer will forward the submittal to the ALDOT Design Engineer. Work shall not begin until the submit tal has been returned to the Project Engineer for distribution to ALDOT field personnel for inspection of the work.
b.Inspection of Pipe prior to Rehabilitation. Inspection of the pipeline shall be performed by experienced personnel trained in locating breaks, obstacles, connections, and junctions by closed circuit television. The interior of the pipeline shall be carefully inspected to determine the location of any conditions which may prevent proper installation of the liner into the pipe. Prior to inst allation of PE liner pipe the Contractor shall follow the inspection requirements given in ASTM F 585. A video tape and suitable log shall be submitted to the Engineer for review prior to the installation of the liner. The installation of the liner shall n ot begin until the Engineer informs the Contractor that the review of the inspection tape and log has been completed.
c.Cleaning and Repairing Pipe. The Contractor shall clean the pipeline of all obstructions that will prevent the insertion of the liner. Prior to installation of PE liner pipe the Contractor shall follow the cleaning requirements in ASTM F 585. The Contractor shall perform minor repairs to the pipe (patching spalls, sealing holes, etc.). If the extent of obstruction and damage is severe, t he Engineer may require the Contractor to uncover the pipe, remove the obstructions, and repair the pipe. Excavation and repair work will be paid for as Extra Work. The Contractor shall not install the liner in roadway pipe sections having dropped joints or line swags without prior approval from the Engineer.
d.Water. The Contractor shall provide for the flow of water around the section or sections of pipe designated to be rehabilitated. Any diversion of water shall be approved by the Engineer prior to diversion. The Contractor shall notify the local fire department and water board and obtain approval and water meter, if required, before using fire hydrants.
e.Delivery, Storage and Handling of Materials. The Contractor shall be responsible for delivery, storage, and handling of products. Products shall be kept safe from damage. Damaged products shall be removed from the job site promptly and shall be replaced with undamaged products.
f.Installation Procedure. The Contractor shall install the pipe liner in accordance with the installation procedures that have been distributed by the Engineer after being submitted by the Contractor. The Contractor shall install the PE liner pipe in accordance with the installation procedures given in ASTM F 585. The ann ular space between the existing pipe and the PE liner pipe shall be filled with a low density grout or concrete. A full protocol for time, rate of travel of the ultraviolet assembly, pressures, and amount of lamps in operation shall be maintained and submi tted as documentation for the correct ultraviolet light curing of the fabric tube. The protocol shall be recorded automatically from the beginning of inflation of the liner until the end of the curing. It shall also show the basic information in a header, such as project name, address, section, and date, to clearly identify the renovated section.
g.Sealing Pipe at Junction Box, Inlet or Headwall. If there is not a tight seal in a junction box, inlet or headwall, the Contractor shall apply a sealant at tha t point by pressure injection or other means to ensure a watertight seal. The repair shall be rechecked after 48 hours to ensure that the seal is holding. If the seal does not hold, the Contractor
539.02 Materials.
shall continue to apply sealant until a seal is made and there are no leaks. The Contractor shall seal the pipe without additional compensation.
h.Inspection of Pipe after Rehabilitation. Inspection of the pipeline shall again be performed by experienced personnel trained in the use of closed circuit televisi on for the inspection of pipes. The interior of the pipeline shall be carefully inspected to determine if there are areas where the liner does not adhere to the pipe wall, or if there are ruptures in the lining. A video tape and suitable log shall be submi tted to the Engineer for review after the installation of the liner. All repairs shall be made without additional compensation.
i.Clean Up. After the installation work and inspection has been completed and the work found acceptable, the Contractor shall clean up the work area. All excess material and debris not incorporated into the permanent installation shall be disposed of by the Contractor. The work area shall be left in a condition equal to or better than prior condition.
j.Warranty. All pipe rehabilitation work shall be warranted to be free from defects in materials and workmanship for a period of five years from the date of rehabilitation. The Contractor shall obtain a written warranty from the supplier of the cured -in-place liner system or P E liner pipe and submit it to the Engineer after the initial inspection and before installation begins. The warranty should include the statement that any defect that occurs during a five year period that is attributable to the liner installation or mater ials will be repaired by the supplier at no cost to the ALDOT. It should be noted in the warranty that the five year period shall begin upon final acceptance of the rehabilitated pipe.
538.04 Method of Measurement.
Roadway pipe rehabilitation will be measu red in linear feet {meters} along the flowline of the rehabilitated pipe.
538.05 Basis of Payment.
a.Unit Price Coverage. Roadway Pipe Rehabilitation, measured as noted above, will be paid for at the contract unit price, which shall be full compensation for submittals, furnishing and installing the pipe lining, cleaning and minor repair of the pipe, the warranty and for all equipment, tools, labor and incidentals necessary to complete the work. The contract price shall also include television inspection before and after liner installation.
b.Payment will be made under Item No.: 538-A inch {mm} Roadway Pipe Rehabilitation - per linear foot {meter} 538-B inch {mm} Span, inch {mm} Rise Roadway Pipe Rehabilitation - per linear foot {meter} SECTION 539 TRENCH DRAINS
539.01 Description.
This Section shall cover the work of constructing trench drains. The drains shall be of cast -in-place concrete drains or prefabricated drainage channels encased i n cast -in-place concrete. The drains shall be constructed to form a channel for the collection and flow of stormwater. Grates shall be installed to allow water to pass into the channel and to allow vehicular traffic to move over the drains.
539.02 Materia ls.
a.Drain Channel . The minimum width and depth of the drain channel below the drain grate will be shown on the plans. The drain channel shall have a rounded bottom. Connections to structures shall not restrict the hydraulic flow of the drain channel .
Source: Alabama Standard Specifications for Highway Construction, 2022 Edition. Pages 420–421 of 934.