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- 67-3.01B Definitions
- 67-3.01D Quality Assurance
- 67-3.02B Pressure Grouting
- 67-3.02C Reserved
67-3.01 GENERAL67-3.01A SummarySection 67-3 includes specifications for constructing metal liner plate pipe. Metal liner plate pipe must be constructed from 2-flange or 4-flange plates. Pipes must be circular and consist of a series of galvanized corrugated metal liner plates with a minimum width of 18 inches for 2-flange plates and 16 inches for 4-flange plates. Furnish plates with 2-inch diameter, or larger, grouting holes with pipe plugs. When the plates are installed, grouting holes must be spaced so that one line of holes is at the pipe crown and one line of holes is on each side at approximately the midpoint as shown. The holes in each line must be not more than 6 feet apart, and holes in adjacent lines must be staggered. 67-3.01B DefinitionsReserved 67-3.01C SubmittalsSubmit a certificate of compliance for metal liner plate pipe. Submit a copy of the manufacturer’s instructions before you assemble pipes. For tension test specimens, submit mill test reports as specified for plates for each heat and thickness upon notification.
67-3.02 MATERIALS67-3.02A GeneralThe base metal for liner plates must comply with ASTM A1011/A1011M. Ungalvanized flat sheets and plates must comply with the quality requirements in the following table:
Galvanize plates under AASHTO M 167M/M 167 after the plates are formed, punched, and curved. Bolts and nuts for assembling 2-flange plates must not be less than 5/8 inch in nominal diameter. Bolts and nuts for circumferential flange seams must comply with ASTM A307 for Grade A chemical and mechanical requirements and Grade B dimensions. Bolts and nuts for longitudinal seams must have square heads with a square shoulder to engage the plate. Bolts and nuts for longitudinal plate seams from 0.075 to 0.179 inch thick must comply with ASTM A307 for Grade A chemical and mechanical requirements. Bolts for longitudinal plate seams from 0.209 to 0.239 inch or thicker must comply with the chemical and mechanical requirements under ASTM A449. Nuts for use on bolts specified in ASTM A449 must comply with ASTM A307 for Grade A chemical and mechanical requirements and Grade B dimensions. Bolts and nuts for the assembly of 4-flange plates must not be less than 1/2 inch in nominal diameter for 0.105 to 0.179 inch thick plates and not less than 5/8 inch in nominal diameter for plates of greater thickness. Bolts and nuts must be quick-acting coarse thread complying with ASTM A307. Galvanize bolts and nuts under ASTM A153/A153M. The moment of inertia based on the average of 1 ring of plates, must not be less than the values shown in the following table:
Longitudinal seams must have enough bolts to develop the ultimate seam strength shown in the following table:
Plates must be: 1. Punched for bolting on both longitudinal and circumferential seams or joints 2. Formed to produce squarely formed flanges 3. Fabricated so that complete erection is from the inside of the pipe Bolt holes in flanges must be spaced so that plates of the same curvature are interchangeable and to allow staggering of the longitudinal seams. Drilling, punching, or drifting to correct defects in manufacturing is not allowed. Plates with improperly punched holes will be rejected. Circumferential bolt spacing must be approximately 9-1/2 inches center-to-center for 4-flange plates and must be approximately 12-1/2 inches center-to-center for 2-flange plates. 67-3.02B Pressure GroutingGrout for pressure grouting must consist of a suitable mixture of cementitious material, sand, and a chloride-free admixture designed to provide a pumpable mix. The grout must contain at least 463 pounds of cementitious material per cubic yard and no more water than necessary to provide a pumpable grout. Materials for grout must be commercial quality. Grout must consist of cement and water and may contain an admixture if authorized. Admixtures must comply with the specifications for admixtures in section 90, except admixtures must not contain chloride ions in excess of 0.25 percent by weight and may be dispensed in solid form. Add water to the mixer followed by cement and admixture. Mix the grout with mechanical mixing equipment that produces a uniform and thoroughly mixed grout. Do not exceed 5 gal of water per 94 lb of cement. Retempering of grout is not allowed. Agitate the grout continuously until the grout is pumped.
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