Pilot Tube or Guide Boring Method for Pipe

Pilot Tube or Guide Boring Method for Pipe Ramming Guidance With Case Histories

AGENDA • • Pipe Ramming Drill Stem Recovery Pipe Removal / Bore Salvage Case Study: EJM Pilot Tube Pipe Ram Slick Bore Case Study: Railroad Culvert Undercrossing • Questions

Pipe Ramming PIPE RAMMING

Pipe Ramming BASICS STANDARD RAMMING • 4 -in through 147 -in casings • 118 -in, 122 -in, 138 -in & 147 -in casings Successfully Rammed • Eliminates Slump or Rise • Tools Configure to a Range of Casing Diameters

THE PROCESS: Typical Pipe Ramming Configuration

ROUTINE 12” Thru 36” CHALLENGING 36” Thru 80” ADVANCED 80” Thru 144”

Pipe Ramming TECHNIQUES DRILL STEM RECOVERY • Rammer Fitted with Special Sleeve • Drill Stem Welded to Back of Sleeve • Percussion Frees Stuck Drill Stem • Push Through or Pull Out

Drill Stem Retrieval

Pipe Ramming TECHNIQUES PIPE REMOVAL/ BORE SALVAGE • Rammer Attached to Product Pipe • Percussion Removes Pipe from Bore • Salvage Job • Bore Again

Product Pipe Removal/Bore Salvage-Job Site

Pipe Ramming CASE STUDY: EJM PILOT TUBE -PIPE RAM

Pipe Ramming CASE STUDIES GBM BACKGROUND • On Grade & Alignment Installation • Highly Accurate Installations • Theodolite Guidance System • Video Monitoring of Illuminated Target • Angled Steering Head Similar to HDD

Pipe Ramming CASE STUDIES GBM BACKGROUND • 1. Pilot Tubes Installed behind Steering Head • 2. Auger Head Tube Sections Installed • As Auger Sections Installed, Pilot Tube Sections Removed at Exit Pit • Pipe Adapter Installed • Product Casing Attached to Adapter • 3. Thrust into Place

Pipe Ramming CASE STUDIES GBM BACKGROUND • Not All Soil Conditions or Pipe Diameters Favorable for total GBM Installation • Pipe Ramming Assist • After Pilot Tubes Installed on Line & Grade • Special Ramming Adapters • Rammer takes place of Auger • Installation remains on Line & Grade

Pipe Ramming CASE STUDIES PROJECT BACKGROUND • EJM Pipe Services- Lino Lakes, MN • Project Location: Chaska, MN • Along the Minnesota River • Spring Thaw • Flood Stage River Levels

Pipe Ramming CASE STUDIES PROJECT BACKGROUND • Sanitary Sewer Main • 36 -inch Diameter inside 54 -inch Casing • 160 feet in length • New Development • Under Concrete Creek Channel • Creek runs through town

Pipe Ramming CASE STUDIES PROJECT BACKGROUND • Grade Sensitive Project • Avoid slump & disturbance of concrete channel • Unstable, saturated ground conditions • Engineer utilized slump monitoring equip.

Pipe Ramming CASE STUDIES PROJECT SPECS • Began @ 1% Downhill Grade • 4 -inch Pilot Tube

Pipe Ramming CASE STUDIES PROJECT SPECS • Installed 4 -inch to 24 -inch Adapter • Pushed into place

Pipe Ramming CASE STUDIES PROJECT SPECS • Installed 24 -inch to 54 -inch Adapter • Pushed into place

Pipe Ramming CASE STUDIES PROJECT SPECS • Remove Auger • Weld 54 -inch by 20 -ft casing to adapter • Set up pipe rammer • Cut out steel bulk head • Loose material & water flow • Sandbags & Underlayment fabric to

Pipe Ramming CASE STUDIES PROJECT RESULTS • 1 st Section Installed without incident • Next section added and rammed in place • Subsequent casing sections rammed in place

Pipe Ramming CASE STUDIES PROJECT RESULTS • 4 - to 24 -inch Adapter Removed • Final Casings installed to 160 feet

Pipe Ramming CASE STUDIES PROJECT RESULTS • Casing installed on grade • 24 -in to 54 -in Adapter Removed • Spoil removed with auger • Ramming Times: 20 -50 Min/20 -ft section

Pipe Ramming CASE STUDIES PROJECT RESULTS • Slump Monitoring Results: • Front of Launch Pit Levee Edge- 2 ½ inches • Under Channel- ½ inch • Receiving Pit Levee Edge- 1 ¼ inches • All within tolerance • Less slumping than anticipated

CASE STUDY REVIEW

Pipe Ramming TECHNIQUES PIPE RAM SLICK BORE • Ram in Reusable Bore Pipe • Clean Out Spoil • Weld Product Pipe to Back End of Bore Pipe • Remove Bore Pipe with Winching Device • Pull in Product Pipe while Removing Bore Pipe

Slick Bore Step #1

Slick Bore Step #2

Slick Bore Process Overview

CASE STUDY SLICK BORE

Pipe Ramming CASE STUDIES PROJECT BACKGROUND • Minn. Can Pipeline project is a 303. 75 mile 24” crude oil pipeline • From the Minnesota-Canada border to the Flint Hills Resources Refinery in Rosemount, MN • Pipeline is owned by Natural Resources Group, Inc. , Minnesota Pipeline Company, and Universal Ensco, Inc

Pipe Ramming CASE STUDIES PROJECT BACKGROUND • Two Sections: • Northern 150. 41 mile section from the Canadian border to Clear brook, MN • Southern 153. 34 mile section from Clearbrook, MN. to the refinery in Rosemount, MN • Total of 303 road crossings and 19 horizontal directionally drilled crossings

Pipe Ramming CASE STUDIES PROJECT BACKGROUND • MN Limited- Southern Section • 156 road crossings

Pipe Ramming CASE STUDIES EQUIPMENT LIST • Goliath Grundoram pipe rammer • BP 500 bentonite pump for lubrication • 24” pipe ramming accessories • Pig launcher and pipe pigs for clean out • Reusable bore pipe

Pipe Ramming CASE STUDIES SLICK BORING • The reusable bore pipe is rammed in place • Bentonite or polymers are used to lubricate the bore hole and the soil inside the bore pipe • The soil is expelled from the bore pipe • Line pipe will then be welded to the bore pipe

Pipe Ramming CASE STUDIES SLICK BORING • Utilizing a sideboom tractor and winch • The bore pipe is pulled out of the bore hole • While the line pipe, welded to the bore pipe, is pulled into place

Pipe Ramming ON THE JOB CASE STUDIES • Stearns County Road 23 northwest of Richmond, MN • 95 ft. bore • Bore pipe: 115 ft. of 0. 500 -in wall x 24 in diameter pipe • 0. 750” bentonite supply line welded to the pipe

Pipe Ramming ON THE JOB CASE STUDIES • 115 ft. bore pipe was lifted into position with a sideboom & an excavator • Rammer positioned and supported by an excavator • Air compressor and bentonite pump are mounted to a semi-tractor trailer for mobility • Positioned on the right-of-way at the

Pipe Ramming ON THE JOB CASE STUDIES • Typical bentonite or polymer application approx. 900 gallons for a 95 ft. bore • Ramming times varied from 30 to 60 minutes per bore • Three bores of 95 ft. length were completed the first week • At the week two the crew had completed five bores of 95 to 100 ft. in

Pipe Ramming ON THE JOB • CASE STUDIES By the time they completed Phase 3 they were doing 8 bores per week in a six day work week

Pipe Ramming Case Study: Railroad Culvert Undercrossing

Pipe Ramming CASE STUDIES ARB • NOTEABLE Union Pacific Railroad Culvert • Failed Culvert Replacement • 48 - & 65 -inch Culverts • 24 -inch Grundoram Taurus • Access • Emergency Ram

Pipe Ramming CASE STUDIES LOCATION • Feather River Canyon • East-West Rail Corridor • Northern Nevada & Northern California • Sierra Nevada Mountains

Pipe Ramming CASE STUDIES BACKGROUND • Early 2006 - Significant Drainage Problems • Runoff Culverts - Failed & Collapsed • Emergency Crews 24 hr pumping • Train traffic slowed 10 mph • Relieve pressure on saturated soils

Pipe Ramming CASE STUDIES PROJECT SPECS • Difficult Soil Conditions • Ramming ideal solution • Difficult access • Equipment brought in on rail cars • Elevation 4, 500 -5, 000 feet

Pipe Ramming CASE STUDIES PROJECT SPECS • Install 48 - & 65 -inch culverts • Pipe Ramming • 24 -inch diameter rammer • ### lbs dynamic energy • (2) 1, 600 CFM Air Compressors

Arntzen Steel Rockford, Ill.

Pipe Ramming CASE STUDIES LESSONS • Deteriorating infrastructure not limited to cities municipalities or utilities • Deteriorating Rail Culverts pose serious threat • Potential for major accident • Problem needs immediate attention

Questions?

Thank You!