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<br />PGSF WMVD Storm and Combined Sewer - Construction Package 2 Injection Grouting <br />Project No. 180162 03 64 00 - 5 <br /> <br />2.04 EQUIPMENT <br />A. Grouting equipment shall consist of two separate pumping systems capable of supplying <br />an uninterrupted flow of sealing materials to fill the voids completely. The gel side of the <br />system shall be a closed system to minimize exposure to moisture. Pumps, fittings, and <br />hoses shall be designed to transport a high viscosity material and shall not be affected <br />by acetone or ketone solvents. The sizing of the system shall be such that the water side <br />can transport materials at 1 to 1 or 8 to 10 times the ratio of the gel side. Pumps shall <br />be sized to deliver a minimum of 3 gpm. <br />B. Grout shall pass from the pumping system through instant reading, controlled flow <br />meters and then through a dual hose system into the sealing device. The device (referred <br />to hereafter as a packer) shall be a cylindrical case of a size less than pipe size, with the <br />cables at either end used to pull it through the line. The packer device shall be <br />constructed in such a manner as to allow a restricted amount of sewage to flow at all <br />times. <br />C. Air impervious inflatable sleeves shall be mounted over the cylinder with the ends of the <br />sleeve sealed to the ends of the casing. The sleeves shall be so constructed that they <br />can be pneumatically expanded from the center to both ends. The center portion of the <br />sleeve shall be sealed to the casing by a broad confining band. When the packer is <br />inflated, two widely spaced annular bladders shall be formed, each having an elongated <br />shape and producing an annular void around the confined portion of the sleeve. The <br />packer (between the ends) shall be expandable in order to reduce the amount of wasted <br />grout in the void area. No sealing device which is expanded mechanically nor where the <br />expansion sleeve is not continuous will be allowed in order to prevent damage to the pipe <br />from excessive amounts of sealing pressures or air leakage in the center area of such <br />sealing device. Only low void packers with annular space less than ¼ gallon shall be <br />used. <br />D. Tap and lateral service sealing shall be accomplished with a lateral packer. The objective <br />of the lateral service packer is to seal the tap connection to the main sewer and a portion <br />of the lateral service. The lateral sealing tube shall be designed to accommodate 4-inch <br />and 6-inch diameter laterals and laterals with a transition diameter. Sealing of lateral tap <br />connections directly connected to the mainline sewer shall be completed using an 8-foot- <br />long sleeve. Sealing of lateral pipe joints for laterals connected to manholes shall be for <br />the first 20 feet, as measured from the manhole wall to the pipe transition or to the <br />cleanout, whichever comes first. <br />2.05 MANHOLE/STRUCTURE JOINT SEALING GROUT <br />A. Rapid setting cement to eliminate infiltration shall be Quadex Quad-Plug or approved <br />equal. <br />B. Fill any large voids with patching mix such as Quadex Hyperform or approved equal. <br />C. Pressure chemical grout shall be DeNeef, Inc., Oil-free Oakum and Hydro Active Sealfoam <br />or Hydro Active Flex LV grout, Scotch-Seal Chemical hydrophilic grout 5000, 5610, Avanti <br />AV-333 Injectaflex or other approved gel type chemical grout. Provide Avanti MG-AV-290 <br />hydrophobic polyurethane foam grout or other approved foam grouts for high volume <br />leaks.