6-Method of Approach - Pipe.pdf

METHOD OF APPROACH

ADOT Procurement - On-Call Pipelining and Drainage Repair Services (BPM005628)

The Offeror shall provide a brief narrative on the entire process of a pipelining project from start to finish.

Notice of Task Order Upon notice of a task order, Danny Hoback, Project Manager, will setup a field meeting to review the scope of work onsite with the ADOT representative. At the site visit Danny will work with the District to:

• Identify the limits of the scope of work.

• Identify access requirements and restrictions.

• Identify the location of water source and dump sites.

• Determine the appropriate traffic control requirements for the work.

Upon completion of the site visit Danny will produce a detailed cost estimate and schedule for the individual scope of work.

Notice to Proceed:

Once a notice to proceed is issued, Danny will coordinate with Rafel Frisby, Superintendent, to dispatch crews and equipment.

Step-by-step Procedure for Pipelining:

1. Pipe Delivery - Pipe will be delivered to ADOT maintenance facilities and unloaded by Granite in an area designated by ADOT.

2. Hydrovac Pipes - Hydrovac of pipes is preferred to be done from the outlet end of pipe(s), however it can be done from inlet side when roadside conditions make it too difficult for access.

3. Pipe Distribution - Granite will reload the stored pipe at ADOT maintenance facilities and haul to pipelining locations. This work is performed with a two-man crew, reach-forklift and F-550 flatbed truck pulling goose neck trailer.

4. Lining the pipe(s) - This process starts by choosing the inlet or outlet end that provides the most work area with the least amount of disturbance to the right of way. The pipe comes in 24 FT long joints with a factory milled bell and spigot that utilizes a rubber O-ring gasket to seal and lock the bell and spigot joints together. Joints are lubricated with a substance provided by the pipe manufacturer made specifically to aid in “snapping” pipe joints together. Granite utilizes a combination of come-a-longs, chain hoists, straps, chains, and heavy equipment to ensure the pipe is snapped together properly. The pipe is then pushed through the existing pipe 24 FT at a time with a backhoe or rough terrain forklift until it sticks out 12” on each end. If more than 12” of pipe is sticking out it is cut off and used in other locations.

Two 2” PVC pipes are inserted into the resulting annular space on top of the newly inserted pipe to provide a means for the grout to be pumped into the annular space. Bulkheads are constructed at each end of the pipe to hold the grout in place. Lining of pipe is performed with a four-person crew consisting of Foreman with pickup, F-550 flatbed truck with gooseneck trailer, backhoe, truck driver, operator, and laborer(s).

5. Grout Annular Space - Grout is pumped into the resultant space between the existing pipe and the new liner pipe. A towable trailer mounted grout pump is connected by a hose to the 2” PVC pipe. Grout (300 PSI) is purchased from commercial sources and delivered in ready mix trucks to the pipe location. Grout is pumped into the annular space until it comes out of the observation ports on each end.

6. Cleanup & Inspection - Granite will cleanup and restore the areas of disturbance that were created. ADOT district personnel will be requested to accept the completed work on the last day of work before we leave a project.