2003-118A.2 - Laserfiche WebLink

Home Browse Search

and dewatering shall comply with the applicable requirements of Section 02220 of these Specifications and the requirements of the applicable authorities . 3 . 4 INSTALLATION A . Installation of Steel Casing Pipe by Boring : 1 . The boring method shall consist of pushing the pipe into the soil with a boring auger rotating inside the pipe to remove the material . 2 . Install in accordance with FEC requirements and these Specifications . In the event of a conflict , the more stringent specification shall govern . 3 . Design bracing and backstops and use jacks of sufficient rating such that jacking ' can be accomplished in a continuous manner until the leading edge of the pipe reaches the final positions shown on the Plans . 4 . Provide the front of the casing pipe with suitable mechanical arrangements or devices that will positively prevent the auger and cutting head from leading the pipe so that there will be no unsupported excavation ahead of the pipe . 5 . The equipment and mechanical arrangements or devices used to bore and remove the 'earth shall be removable from within the casing pipe if an obstruction is encountered . 6 . The face of the cutting edge shall be arranged to provide reasonable obstruction ' to the free flow of soft or poor soil . 7 . Do not use water or other liquids to facilitate casing emplacement or spoil removal . 8 . If voids develop around the casing pipe as it is bored , pump cement grout to fill all such voids . 9 . Fill all voids as specified hereinafter as soon as possible after completion of ' boring operation . B . Obstructions : If an obstruction is encountered during installation to stop the forward action of the casing pipe , and it becomes evident that it is impossible to advance the pipe , remove obstruction at the leading end of the casing pipe . No blasting shall be permitted . C . Installation of the Carrier Pipe : 1 . After completion of the steel casing pipe , install the carrier pipe and pressure test it by an approved method . 2 . Take care to prevent undue disturbances of the joints . ' 3 . Lay the carrier pipe to the line and grade shown on the Plans . 4 . The carrier pipe shall be blocked in place , using stainless steel casing spacers , as manufactured by Advance Products & Systems Inc . , Cascade Waterworks Mfg . , or equivalent , to secure it against movement , including flotation , at a maximum spacing of 5 feet or as recommended by the spacer manufacturer, whichever is less . Last revised 01 /25/2001 02250-5 EAST GIFFORD RIPublic worksweithmstorrnmeter Projects\Cfford East\Construction Contract\Technicai Specifications\Final Specifications\Division ' 2\02250 - Crossings by Boring and Jacking.doc