2003-106 - Laserfiche WebLink

Home Browse Search

2 .2 .4 Brine Main Pine in Trenches All pipe shall be laid to the depth and grades according to the Plans . The depth shall be measured from the established bench marks. Pipe Joints The ends of pipe, coupling grooves, gaskets and rubber rings shall be cleaned immediately before assembling. The assembly shall be made as recommended by the manufacturer. Lubricant for sealing gasket shall be as specified in ANSI 21 . 11 (AWWA C111 -72). Pipe shall not be deflected either vertically or horizontally in excess of that recommended by the manufacturer. Preventing Trench Water from Entering Pipe When pipe laying is not in progress, the open ends of installed pipe shall be closed by approved means to prevent entrance of trench water into the line. Floating Pipe ' Whenever water is excluded from the interior of the pipe, adequate backfill shall be placed on the pipe or well pointing installed to prevent floating. Any pipe which has floated shall be removed from the trench and be re-laid as directed by the Engineer. ' All foreignmatter or dirt shall be removed from the interior of i before lowering into position pipe in the trench. Pipe shall be kept clean by means approved by the Engineer during and after I aying. Alignment and Grade The pipe shall be laid, as directed by the Engineer, on a firm soil cut true and even to afford bearing for the full length of the barrel of the pipe. Temporary support, adequate protection and maintenance of all underground and surface utility ' structures, drains, sewers, and other obstructions encountered in the progress of the work shall be furnished by the Contractor at his own expense under the direction of the Engineer. Unsuitable Conditions for Joining Pipe No pipe shall be laid in wet trench conditions which preclude proper bedding, or on frozen trench J bottom, or when in the opinion of the Engineer the trench conditions or the weather are unsuitable for proper installation. J J 14 responsibilities associated with the furnishing or an ianor, matentuJ, vgLupiii%.=aL u.=. . ___• _ •• __-»-� required to install, complete, required trenchless installation of pressure mains, as shown on the Drawings and as specified herein. Experience The Contractor must demonstrate expertise in trenchless methods using a wire guided locating system by providing a list of ten ( 10) utility references for which similar work has been performed in the last two years. The references should include a name and telephone number where contact can be made to verify the contractor's capability. The Contractor must provide documentation showing successful completion of the projects used for reference. Conventional trenching experience will not be considered applicable. All supervisory personnel must be adequately trained and shall have at least four (4) years experience in directional boring. The Contractor shall submit the names and resumes of all supervisory field personnel prior to construction. Because of time constraints, the Contractor may wish to provide multiple experienced directional boring crews. The directional boring equipment shall be capable of installing the minimum pipe diameter noted on the plans. Submittals Submit technical data forui ment including clay slurry material, method of installation with �I P working drawings, and proposed sequence of construction for approval by the Engineer. I Prior to approval for directional boring, the Contractor must submit the names of supervisory field personnel and historical information of directional boring experience. In addition, the Contractor must submit for approval nameplate, data for the drilling equipment, mobile spoils removal unit, and MSDS (Material Safety Data Sheets) information for the drilling slurry compounds. The Contractor is required to bring to the attention of the Engineer any known design discrepancies with actual tunneling methods that the Contractor will be performing. This shall be stated in writing to the Engineer no later than the pre-construction meeting. Provide shop drawing submittal and sample of pipe, fused joint, and trace wire. 20