Specifications include, but are not limited to: 4.3. Liner Pipe Installation Plan 4.3.1. The Contractor shall submit a liner pipe installation plan to the ordering District for approval fourteen (14) calendar days prior to installation of liner pipe; approval shall be gained prior to commencement of work. At a minimum, the plan shall include: 4.3.1.1. A description of the required reinforcement of the liner pipes to prevent deformation and maintain the liner pipe shape. 4.3.1.2. The proposed method to prevent flotation of the liner pipe (such as blocks or skids). The description shall include the size, spacing, and pattern, type of material and method of attachment of any proposed flotation prevention device. Flotation prevention devices shall have sufficient structural strength to resist the buoyant force created as the liner pipe is grouted in place. 4.3.1.3. A description of the type of pipe joints for the liner pipe. 4.3.1.4. A description of how the Contractor will insert the liner into the existing pipe, including the type of equipment and method to be used to push and/or pull the liner pipe material. 4.3.1.5. The method to assure that joints do not separate during insertion. 4.3.1.6. A description of the installation sequence for lining the existing pipes with catch basins, if applicable. 4.4. Grout Injection Plan 4.4.1. The Contractor shall submit a grout injection plan to the ordering District for approval prior to installation of liner pipe; approval shall be gained prior to commencement of work. The grout injection plan shall detail how the Contractor plans to grout the annular space between the existing culvert and the liner pipes. The plan shall include: 4.4.1.1. How the Contractor will avoid collapse and floating of the liner pipe during grouting. 4.4.1.2. Methods to be used to ensure that the grout does not leak through the pipe joints during grouting. 4.4.1.3. How the forms and bulkheads will be constructed to seal the ends of the existing pipe and resist pressure due to grout injection. 4.4.1.4. The method to be used to close off the two openings used to pump grout into the annular space. 4.4.1.5. The method to be used to close off the grout verification opening. 4.4.1.6. The method to assure that there are no air voids in the grouted annular spaces. 4.4.2. Variation from the approved liner installation plan, grout injection plan, and grout mix design shall be grounds for the Department to stop work until the Contractor complies with the approved submittals. 4.5. CCTV Camera 4.5.1. At the Department’s direction the Contractor shall use a robotic inspection crawler closed circuit television (CCTV) camera prior to and during work. The camera shall have “live feed” capability to inspect for any obstructions or pipes prior to work. 4.6. Material 4.6.1. High Density Polyethylene 4.6.1.1. High Density Polyethylene (HDPE) pipe liners shall be in accordance with American Society for Testing Materials (ASTM) ASTM F 714. The pipe liner shall have a Standard Dimension Ratio (SDR), as defined in ASTM F 412, equal to or less than 32.5. The resin used in fabrication of the liner shall have a minimum cell classification of 345434C in accordance with ASTM D 3350.
