The Pipe Ramming Method

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.

CU

LVE

RT

INS

TALL

AT

ION

AN

D R

EP

LAC

EM

EN

T

PIP

E R

AM

MIN

G

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

CU

LVE

RT

INS

TALL

AT

ION

AN

D R

EP

LAC

EM

EN

T

PIP

E R

AM

MIN

G

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

CU

LVE

RT

INS

TALL

AT

ION

AN

D R

EP

LAC

EM

EN

T

PIP

E R

AM

MIN

G

Preferred for Adverse Soil Conditions

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

CU

LVE

RT

INS

TALL

AT

ION

AN

D R

EP

LAC

EM

EN

T

PIP

E R

AM

MIN

G

SWALLOWS LARGE OBSTRUCTIONS

• Rock swallowed during ram• Spoil removed post ram

54” Casing

CU

LVE

RT

INS

TALL

AT

ION

AN

D R

EP

LAC

EM

EN

T

PIP

E R

AM

MIN

G

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.

CU

LVE

RT

INS

TALL

AT

ION

AN

D R

EP

LAC

EM

EN

T

PIP

E R

AM

MIN

G

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.

CU

LVE

RT

INS

TALL

AT

ION

AN

D R

EP

LAC

EM

EN

T

PIP

E R

AM

MIN

G

METHOD IMPLEMENTATIONTrenchless Culvert Replacement Under Railways with the Pipe Ramming Method

RAM SITE LAYOUT

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

CU

LVE

RT

INS

TALL

AT

ION

AN

D R

EP

LAC

EM

EN

T

PIP

E R

AM

MIN

G

SITE PREP: CASING PLACEMENTC

ULV

ER

T IN

STA

LLA

TIO

N A

ND

RE

PLA

CE

ME

NT

PIP

E R

AM

MIN

G

Rail system I-beam Pipe Mule™ Leveling System

STEEL CASING PREPC

ULV

ER

T IN

STA

LLA

TIO

N A

ND

RE

PLA

CE

ME

NT

PIP

E R

AM

MIN

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

ULV

ER

T IN

STA

LLA

TIO

N A

ND

RE

PLA

CE

ME

NT

PIP

E R

AM

MIN

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

ULV

ER

T IN

STA

LLA

TIO

N A

ND

RE

PLA

CE

ME

NT

PIP

E R

AM

MIN

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

CU

LVE

RT

INS

TALL

AT

ION

AN

D R

EP

LAC

EM

EN

T

PIP

E R

AM

MIN

G

NEW INSTALLATION – GRAND ISLAND, NEC

ULV

ER

T IN

STA

LLA

TIO

N A

ND

RE

PLA

CE

ME

NT

PIP

E R

AM

MIN

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

ULV

ER

T IN

STA

LLA

TIO

N A

ND

RE

PLA

CE

ME

NT

PIP

E R

AM

MIN

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

ULV

ER

T IN

STA

LLA

TIO

N A

ND

RE

PLA

CE

ME

NT

PIP

E R

AM

MIN

G• New culvert installation under rail

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

TELESCOPING METHOD – ALASKAC

ULV

ER

T IN

STA

LLA

TIO

N A

ND

RE

PLA

CE

ME

NT

PIP

E R

AM

MIN

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


ULV

ER

T IN

STA

LLA

TIO

N A

ND

RE

PLA

CE

ME

NT

PIP

E R

AM

MIN



First section of pipe installed.


ULV

ER

T IN

STA

LLA

TIO

N A

ND

RE

PLA

CE

ME

NT

PIP

E R

AM

MIN



Swallowing and removing sections.


ULV

ER

T IN

STA

LLA

TIO

N A

ND

RE

PLA

CE

ME

NT

PIP

E R

AM

MIN



Telescoping 60 feet down sized sections.


ULV

ER

T IN

STA

LLA

TIO

N A

ND

RE

PLA

CE

ME

NT

PIP

E R

AM

MIN



Trenchless telescoped pipe.

NEW INSTALLATION – DALTON HWY, AK

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

Bay oil reserves & Fairbanks

CU

LVE

RT

INS

TALL

AT

ION

AN

D R

EP

LAC

EM

EN

T

PIP

E R

AM

MIN

G

NEW INSTALLATION – DALTON HWY, AKC

ULV

ER

T IN

STA

LLA

TIO

N A

ND

RE

PLA

CE

ME

NT

PIP

E R

AM

MIN

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

ULV

ER

T IN

STA

LLA

TIO

N A

ND

RE

PLA

CE

ME

NT

PIP

E R

AM

MIN

G

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.

PIP

E R

AM

MIN

G

HD

D A

SSIS

T

FOUR METHODS

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

PIP

E R

AM

MIN

G

HD

D A

SSIS

T

WASHOVER CASING METHODP

IPE

RA

MM

ING

HD

D A

SSIS

T

• 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



PIP

E R

AM

MIN

G

HD

D A

SSIS

T

PULL BACK ASSIST METHODP

IPE

RA

MM

ING

HD

D A

SSIS

T

• 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.

PIP

E R

AM

MIN

G

HD

D A

SSIS

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.

PIP

E R

AM

MIN

G

HD

D A

SSIS

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.

PIP

E R

AM

MIN

G

HD

D A

SSIS

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


PIP

E R

AM

MIN

G

HD

D A

SSIS

T

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


PIP

E R

AM

MIN

G

HD

D A

SSIS

T

PIPE EXTRACTION METHODP

IPE

RA

MM

ING

HD

D A

SSIS

T

• 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.

PIP

E R

AM

MIN

G

HD

D A

SSIS

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.

PIP

E R

AM

MIN

G

HD

D A

SSIS

TCONNECTION METHOD FOR HDPE

ON THE JOB: PIPE EXTRACTION

• Orlando, FL–HDPE Pipe Extraction

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


PIP

E R

AM

MIN

G

HD

D A

SSIS

T

DRILL STEM RECOVERY METHODP

IPE

RA

MM

ING

HD

D A

SSIS

T

• 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

IPE

RA

MM

ING

HD

D A

SSIS

T

RECOMMENDED HAMMERSP

IPE

RA

MM

ING

HD

D A

SSIS

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: [email protected]: 800.331.6653 | INT: +1.262.567.8833 | F: 262.567.5068W: www.hammerheadtrenchless.com

FIRST NAME LAST NAMEPRESENTER TITLE

Education

The Pipe Ramming Method