391 Pipes showing evidence of crushing at the joints will need a repair plan submitted to the Engineer for appro val. Replacement at no cost to the Division as an option if necessary. I f any soil infiltration is identified at the pipe joint during inspection, a pipe analysis and a remediation plan for repair or replacement shall be submitted to the Engineer for app roval.
604.12.3 Testing of Pipe: A post installation camera/video inspection of pipe culverts and
laser/mandrel deflection inspection of flexible pipe shall be conducted by the Contractor on all pipe culverts that meet the following requirements:
1.Cumul ative total of 200 linear feet or more of pipe culverts on project; and
2.Project located on National Highway Systems ( NHS ) routes The Contractor may visually inspect, in the presence of the Engineer, in lieu of camera/video inspection where pipe culverts size, orientation, and location allow for easy visual examination. When camera/video inspection is required, it shall be conducted by the Contractor in the presence of the Engineer. The Contractor will note and document any defects or flaws with locations in their reports. Equipment used in these inspections must have the following features: Camera/Video inspection equipment shall be:
1.Configured properly in the pipe both vertically and horizontally, and having the ability to pan and tilt to a 90 degree angle with the axis of the pipe and rotate 360 degrees.
2.Low barrel distortion camera capable to measure cracks as small as 0.01”.
3.Color image with a minimum standard resolution of 720x480 pixels.
4.Equipped with sufficient lighting to pro vide a clear image of the full circumference of the pipe.
5.Capable of recording the station, milepost, distance along the invert of the pipe, or other indicators of location superimposed on the video.
6.Capable of moving through the entire length of the pipe.
7.Software capable of generating a report that shows each fault along with its location from the inspection entrance and a still frame image of the fault. Laser deflection measure device on flexible pipe up to forty -eight ( 48) inches in diameter shall be capable of measuring deflection to an accuracy of 0.5% or better with a repeatability of 0.12% or better. Mandrel device must have an odd number of legs (9 minimum) having a length not less than the outside diameter of the mandrel. The mandrel shall b e pulled by hand with no mechanical assistance. The diameter of the mandrel, whether it is fixed or variable size, must be verified with a proving ring or other method as per the manufacturer’s guidelines. The minimum diameter of the installed pipe at a ny point shall not be less than the diameter, as calculated per equation below: Minimum Diameter of Installed Pipe = (Actual Pipe Diameter) x (Deflection Percentage) Where: Actual Pipe Diameter = Inside pipe diameter of pipe being installed prior to installation Deflection Percentage = 0.95 for 5% deflection and 0.925 for 7.5% deflection The Contractor shall provide a digital copy of the camera/video inspection and issue a report in digital format, detailing all issues or deficiencies noted d uring the inspection, including a remediation plan for each deficiency, no later than 7 calendar days after completion of the inspection.
604.13 Method of Measurement :
Pipe of the different types and sizes, both new and re -laid, will be measured by the linear foot in place, the measurement being made along the centerline of each pipe installed. Branch connections, te es, wyes, and elbows will be measured along their centerlines and these lengths included in the total lengths of the pipe. Wyes, tees, and other branch connections will be measured along the centerlines to points of intersection. Pipe with sloped or skew ed ends will be measured along the invert. The portion of pipe extending through to the inside face of headwalls of all types, manholes, inlets, boxes, or other structures shall be included in the measurement. Pipe designated on the Plans to be installed by the jacking method will be measured separately by the linear foot in place and shall be the actual portion jacked, completed in place, and accepted. End sections will be measured by the number of units installed.
604.14 Basis of Payment :
The quantities, determined as provided above, will be paid for at the contract unit prices bid for the items listed in 604.15, which prices and payments shall be full compensation for excavation and bedding, except as oth erwise provided, backfilling, jacking when called for, furnishing all materials and doing all the work prescribed in a workmanlike and acceptable manner, including all labor, tools, equipment, supplies, and incidentals necessary to complete the work. The unit price bid for end sections shall include excavation and backfill. When, by the authority of the Engineer, the flow line of a pipe is lowered from that shown on Plans, or due to a lack of a firm foundation, or due to a solid rock foundation, unsatisfa ctory material is removed and replaced with suitable material, the work of excavation, replacement, and compaction of material will be paid for in accordance with 109.4.
1.For pipe culverts less than forty -eight ( 48) inches diameter, the work of excavation, measured in excess of one ( 1) foot below the original planned pipe elevation, will be paid for under the provisions of 109.4. When suitable material is not available from the project excavation, payment for replace ment material below final grade line will be made in accordance with subsection 109.4.
2.For pipe culverts 48 -inches diameter or larger, all additional excavation below the original planned pipe elevation and for a width not in excess of the outside pipe diameter plus eighteen ( 18) inches on each side of the pipe, will be paid for at the unit bid price for Item 207001 -* "Unclassified Excavation". When no Item 207001 -* is included in the Proposal, payment for excavation, backfill compaction and replacement material will be made in accordance with 109.4. When suitable material is not available from the project excavation, replacement material will be paid for in accordance with 109.4.
604.14.1 Price Adjustment: Crushed aggregate not conforming with the gradation
requirements as described in subsection 604.2.4.2 will be paid for at the adjust ed contract price base on the degree of nonconformance as specified in Table 604.14.1. A revised unit price for calculation purposes in subsection 307.9.1 will be established based on the unit bid cost minus the cost of the pipe.
Source: West Virginia Standard Specifications for Road and Bridge Construction, 2023 Edition. Pages 411–412 of 1,006.