The Pipe Ramming Method

transcript

PIPE RAMMING METHODPRESENTER(S) NAMES

What is Pipe Ramming?

A pneumatic hammer installs an open ended steel casing that is cleaned out during and after completion of pipe installation.

PIPE RAMMING APPLICATIONS

•Steel casing installation•Culvert replacement •Ram and swallow•Slick boring•Piling•HDD Assist

–Wash-over casings–Stuck Bores–Removal of drill stem–Hydro-locked casings

Advantages

• Trenchless• Able to swallow rock as large as the

inside diameter of the casing• Method does not remove soil until

casing is installed• Minimizes voids

–Roads–Railroads

• Reduced soil compaction

Preferred for Adverse Soil Conditions

• Free flowing sand• Cobble conditions• Large rock formations• Excessive ground water

SWALLOWS LARGE OBSTRUCTIONS

• Rock swallowed during ram• Spoil removed post ram

54” Casing

CULVERT SWALLOWING

An oversized casing is rammed over existing culvert. After installation is complete, old culvert and spoil is removed. Steel casing can serve as the drainage culvert or as a carrier pipe for another pipe inserted within.

TELESCOPING METHODFOR LONGER DISTANCES

An oversized pipe is rammed over the existing culvert until production ceases and is cleaned out. Further progress is made with smaller casings installed within the oversized pipe in the same manner.

METHOD IMPLEMENTATIONTrenchless Culvert Replacement Under Railways with the Pipe Ramming Method

RAM SITE LAYOUT

Note: Follow local regulations for sloping or shoring of pit.

SITE PREP: CASING PLACEMENTC

Rail system I-beam Pipe Mule™ Leveling System

STEEL CASING PREPC

GLUBRICATION

External Shoe

Steel Casing

Internal Shoe

SOIL SHOE

Supplies lubricating fluid to OD and ID of casing during installation.

Reinforces lead casing and provides an annulus for lubrication.

COLLETS AND RAMMERC

G Install Pushing Collets/Collars Install Rammer

The rammer is locked into the collets when the tool is started.

Collets and collars help to distribute the ramming force to the face of the pipe.The collets also lock the rammer into place.

SPOIL REMOVALC

G Spoil removal for >30” and/or large spoil/culverts

Spoil removal <30” Casing

Air and/or water pressure. Seal kit for air pressure removal.

Manual excavation, HDD culvert cleaning tools, jet washing, auger boring wherever applicable.

Seal kit

PIPE RAMMING CASE STUDIESHIGHWAY & RAILROAD CULVERT INSTALLATION & REPLACEMENT WITH PIPE RAMMING

NEW INSTALLATION – ROCKVILLE, MN

• Project–2 – drainage culverts under railroad

• Pipe sizes–1-60” Casing–1-32” Casing

• Equipment–24” Rammer

• Ram distance–1 @ 90’–1@ 195’

• Free flowing sand• Holding grade

NEW INSTALLATION – GRAND ISLAND, NEC

G• Project

–1 – drainage culvert under railroad

• Pipe sizes–1-24” Casing

• Ram distance–1 @ 250’

• Free flowing sand with loose coal dust and other materials

• Installed with 2% grade

NEW INSTALLATION – COUER D’ALENE, IDC

G• Project

–2 – drainage culverts under RR and Highway

• Pipe sizes–2 - 48” casings

• Ram distance–1 @ 190’–1@ 195’

NEW INSTALLATIONS – MARICOPA CTY, AZC

G• New culvert installation under rail

bed.• 84” steel casing• 24” HammerHead Pipe Rammer

TELESCOPING METHOD – ALASKAC

G• Replacement of 84” dia. culvert

drain with telescoping method• 96” steel casing, 164 feet. • 24” HammerHead Pipe Rammer

Collapsed 7’ casing, 164 feet long

First section of pipe installed.

Swallowing and removing sections.

Telescoping 60 feet down sized sections.

Trenchless telescoped pipe.

NEW INSTALLATION – DALTON HWY, AK

• Drainage culvert• Glacial til/new road bed• Service hwy between Prudhoe

Bay oil reserves & Fairbanks

NEW INSTALLATION – DALTON HWY, AKC

G• Project

–1 – drainage culvert under service highway

• Pipe sizes–1 - 36” casing

NEW INSTALLATION – DALTON HWY, AK

• Project–1 – drainage culvert under service

highway

• Pipe sizes–1 - 36” casing

• Ram distance–1 @ 160’C

HDD ASSIST METHODS

PIPE RAMMING

HDD RAM ASSIST

• When problems arise while horizontal directional drilling (HDD) costs begin to add up with each tick of the clock.

• Quick reaction time and expert technical support are critical to salvaging a bore gone bad.

• The percussive power of pipe rammers can help free stuck product pipes, drill stems, and help remove product pipes on failed bores.

FOUR METHODS

•Washover casings•Pull back assist•Pipe extraction•Drill stem recovery

WASHOVER CASING METHODP

• Used as a pilot for large HDD projects• Casings are rammed through difficult soil

conditions to rock or solid soil

• Makes a guide down hole for mud motors• Casing provides a path for drill fluid

recycling and reduces the loss of fluids in surface soils

ON THE JOB: WASHOVER CASINGS

• Hong Kong, China–Wash over casing

• Pipe sizes–2 – 54” casings

PULL BACK ASSIST METHODP

• Assist HDD when pullback is not possible and machine still has rotation capabilities

• Rammer attached to product pipe

• Percussive power frees immobilized product pipes.

PULLBACK ASSIST

Rammer is locked into steel casing via collets. Steel casing is installed using pullback force of HDD and percussive force of the rammer.

TCONNECTION METHOD STEEL

PULLBACK ASSSIST

Rammer is locked into steel casing via collets. The steel casing is connected to the HDPE product pipe via steel to HDPE flange compression kit. HDD pull force is used in conjunction with the rammer to install the pipe.

TCONNECTION METHOD HDPE(OPTION 1)

PULLBACK ASSIST

Rammer is locked into steel casing via collets. Steel casing is welded to steel ring that is flush with HDPE face, and welded to steel sleeve. Steel sleeve is bolted to HDPE product pipe. HDD pull force is used in conjunction with the rammer to install the pipe.

TCONNECTION METHOD HDPE(OPTION 2)

ON THE JOB: PULLBACK ASSIST

• Normangee, TX–Pullback Assist (pipe stuck for 4

days before start of assist)

• Reason for pullback failure – excessive flooding in area caused collapsed entry pit and hole.

• HDD Rig–500,000 lb pullback

• Pipe–2,800’ of 36” casing

ON THE JOB: PULLBACK ASSIST

• Stewart, FL–HDPE Pullback Assist, pipe sat

for more than two weeks before assist could be started due to excessive hurricane season.

• HDD Rig–1.2 M lb custom drill rig

• Pipe size–4,500’ of 24” HDPE pipe 80’ deep

PIPE EXTRACTION METHODP

• Remove stuck product pipe and bore again

• Rammer is attached to product pipe by fabricating an adaptor

• Percussive action along with static tension pulls product pipe, removing it from the bore

PIPE EXTRACTION

Rammer is locked into steel casing that is welded onto the product casing. Static pull force is used in conjunction with the rammer to extract the product casing.

TCONNECTION METHOD FOR STEEL CASING

PIPE EXTRACTION

Rammer is locked into steel casing that is welded onto the steel sleeve. Steel sleeve is bolted to HDPE product pipe. Static pull force is used in conjunction with the rammer to extract the product casing.

TCONNECTION METHOD FOR HDPE

ON THE JOB: PIPE EXTRACTION

• Orlando, FL–HDPE Pipe Extraction

• Pipe size–850’ extraction of 30” HDPE pipe

DRILL STEM RECOVERY METHODP

• Recover expensive stuck drill rod• Rammer is attached the to drill rod by

fabricating an adaptor

• Kinetic energy is used to assist in pulling or pushing rod out of the ground with the assist of static tension

ON THE JOB: DRILL STEM RECOVERYP

RECOMMENDED HAMMERSP

TRammer

SizeHDD Class

Impact Rate BPM

Calculated Impact Force

at 1 ft/min*

Pipe Diameter Range

7” 24,000 lbs 295 184,000 lbs 8” – 16”

8”24,000; 33,000;

50,000 lbs223 252,000 lbs 8” – 24”

12”33,000; 50,000;

80,000 lbs271 744,000 lbs 12” – 36”

16” 80,000 lbs 231 1,094,000 lbs 12” – 48”

20”80,000;

150,000 lbs190 1,740,000 lbs 20” – 54”

24”150,000 lbs and larger

177 2,020,000 lbs 24” – 72”

*The numbers shown here are based on calculation and are for comparative purposes only between various models of HammerHead Rammers. The numbers are not intended for engineering applications.

THANK YOU

E: info@hammerheadmole.comP: 800.331.6653 | INT: +1.262.567.8833 | F: 262.567.5068W: www.hammerheadtrenchless.com

FIRST NAME LAST NAMEPRESENTER TITLE

The Pipe Ramming Method

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