536RELAID PIPE

418

535-A ___ inch {mm} Side Drain Pipe ( * ) - per linear foot {meter} 535-B ___ inch {mm} Span, ___ inch {mm} Rise Side Drain Pipe ( * ) - per linear foot {meter} * Show specific type, class, or wall thickness, if required. Example: V.C., or P.C., or Class ____ R.C., or ___ gage {mm} C.A., or ___ gage {mm} C.S., or ___ gage {mm} C.C.S., or ___ gage {mm} C.C.A. RELAID PIPE

536.01Description

This Section shall cover the work of relaying pipe, regardless of size, in accordance with the requirements of these specifications, at the locations shown on the plans or designated and in accordance with established lines and grades. The item shall include furnishing and construction of such joints, necessary cutting and connections to other pipes, the removal and preservation of that portion of pipe culverts, in place, which are to be replaced by new or re-laid pipe; it shall also include furnishing and construction of such joints, necessary cutting and connections to other pipes, catch basins, end walls, etc., as may be required to complete the work shown on the plans or directed.

536.02Materials

Pipe to be re-laid shall be selected salvaged pipe which is approved for relaying.

An applicable type of joint sealer required by Article 530.02 shall be used.

536.03Construction Requirements

Removal of pipe shall be in accordance with the provisions of Article 206.03.

Pipe shall be handled so that there will be no loss or damage, before relaying. Pieces or sections of pipe found satisfactory by the Engineer shall be re-laid in accordance with the requirements of the appropriate sections governing culvert pipe. Special reference is made to construction details of Section 530 which are applicable to side drain pipe re-laid.

536.04Method of Measurement

Re-laid pipe will be measured in the same manner as specified in Article 530.04. Excavation and foundation backfill for re-laid pipe will not be measured separately for payment, but the cost thereof shall be included in the contract unit price bid for the re-laid pipe.

536.05Basis of Payment

contract unit price bid for either roadway pipe re-laid or side drain pipe re-laid, regardless of size or type of pipe. Said unit costs shall be full compensation for 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.

except for that portion of the old pipe removed outside the limits of excavation provided by Subarticle

214.04(a)

536-A Roadway Pipe Re-laid - per linear foot {meter} 536-B Side Drain Pipe Re-laid - per linear foot {meter} ROADWAY PIPE REHABILITATION 419

ROADWAY PIPE REHABILITATION

538.01Description

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.

538.02Materials

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 Resin-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 Place 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 roadway 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 compounds, 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.

Polyethylene or high density polyethylene liner pipe shall be selected from List II-32 of the Department’s MSDSAR.

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 shown on the plans.

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.

538.03Construction Requirements

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 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 measures 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 Existing 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 Manager. The Project Manager will review the submittal for completeness and then forward the submittal to the Construction Engineer. The Construction Engineer will forward the submittal to the ALDOT Design Engineer. Work shall not begin until the submittal has been returned to the Project Manager for distribution to ALDOT field personnel for inspection of the work. ROADWAY PIPE REHABILITATION 420

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 installation 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 not begin until the Engineer informs the Contractor that the review of the inspection tape and log has been completed.

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, the 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.

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.

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.

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 annular 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 submitted 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.

If there is not a tight seal in a junction box, inlet or headwall, the Contractor shall apply a sealant at that 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 shall continue to apply sealant until a seal is made and there are no leaks. The Contractor shall seal the pipe without additional compensation.

Inspection of the pipeline shall again be performed by experienced personnel trained in the use of closed circuit television 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 submitted to the Engineer for review after the installation of the liner. All repairs shall be made without additional compensation.

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.