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O-Pile.com

Unmatched Efficiency in High Capacity Walls

O-Pile® Technology and Uses

Marine and Water Environments

Ports • Quay Walls • Dock Constructions • Roll-on / Roll-off Facilities • Dolphins

Waterways • Waterway Supports • Retaining Walls • Erosion Control • Berth Facilities • Scour Protection

Water Engineering Structures • Locks • Weirs • Bridge Abutments • Culverts • Safety Gates • Flood Protection Walls • Pier Foundations

Environmental

Pollution Control • Landfills • Enclosures • Contaminated Sites • Vertical-sealed Enclosure Walls • Excavations for Soil Replacement • Tank Enclosures • Refuse Tipping Ramps

Water Protection • Pumping Stations • Sewage Works • Storm Water Overflow • Storm Water Retention Basins

Noise Abatement • Noise Protection Walls

Civil

Civil Engineering • Site Excavations • Foundations • Trench Piling • Underground Parking • Erosion Control

Transportation

Road and Rail • Support Walls • Bridge Abutments • Ramps • Sunken Roads • Groundwater Retention

Eric Leong | GM - Business DevelopmentMobile: +65 93693459 , Skype: merlion_eric

Mer Lion Metals Pte. Ltd., Level 42, Suntec Tower Three, 8 Temasek Boulevard, Singapore 038988Tel : +65 6866 3256, Fax: +65 6866 3636, http://www.merlionmetals.com

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About O-Pile®

O-Pile systems are a rapidly expanding construction method that utilize pipes to form extremely strong foundations, barriers and retaining walls in a cost-effective way.

O-Piles® are steel pipes with welded-on connectors that form a continuous or combined steel wall. Recently, there has been a huge increase in the use of O-Piles on construction projects around the world, particularly with ports, retaining walls, and deep foundations, as well as on a variety of other large- and small-scale projects. O-Piles offer a stronger, more efficient, and more cost-effective alternative to high modulus walls using beams and heavy Z- or U-type sheet piles.

O-Piles are just stronger, any way you

look at it.

With O-Pile WOM-XL and WOF-XL interlock connectors, the design engineer is able to utilize readily-available, locally- produced pipes to provide practical, cost-effective solutions that exceed project requirements.

92mm~~ ~~88mm

180mm~~

6mm weld~~

~20°

~20°

12mm~~

152mm~~ 148mm~~

300mm~~

6mm weld~~

~20°

~20°

12mm~~

WOM/WOF XL

WOM/WOF XXL

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panel weight: kg/m2

sect

ion

mod

ulus

: cm

3 /m

O-Pile Technical AdvantagesThese are the three technical reasons why engineers and designers now consider the O-Pile system to be superior to other sheet pile or concrete options:

1. Efficiency: King pile systems using products like HZM or PSp increase in weight linearly as strength is increased, mainly because there is little change in panel-width across the product range. However, a pipe-to-pipe system of a given wall thickness has almost negligible weight increase as pipe diameter increases; but strength does increase, leading to a power-curve efficiency ratio:

2. Capacity: The vertical load-bearing capacity of O-Piles is significantly higher than U- or Z-type sheet piles of similar weight.

3. Connections: Previous attempts at pipe to pipe were based on using some combination of ‘angle and T’ or ‘CHS and T’ connections that often proved difficult to weld, were prone to de-clutching in hard driving, and also required grouting. The introduction of the WOM/WOF-XL connectors, designed specifically to resist high tension and rotational forces to more than 3400 kN/m, provided the user with a low-cost, high-capacity connection they did not have before.

O-Pile vs Combined Wall Systems

Comparison No. 1

O-Pile Typical system

O 95 1.2m OD × 12mm

HZ 880M C-24 + AZ 14-770

9543 cm3/m 8957 cm3/m

217 kg/m2 265 kg/m2

Comparison No. 2

O-Pile Typical system

O 199 1.7m OD × 17mm

HZ 1180M D-24 + AZ 26-700

19917 cm3/m 19120 cm3/m

310 kg/m2 444 kg/m2

Comparison No. 3

O-Pile Typical system

O 113 1.3m OD × 13mm

PSp 1117 (1023) + PZ612

11314 cm3/m 11330 cm3/m

235 kg/m2 303 kg/m2

O-Pile HZM or PSp

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O-Pile and DurabilityHow well do O-Piles stand up to corrosion?Along with their enormous strength-to-weight ratio and overall cost-effectiveness, O-Piles have a distinct advantage over traditional steel sheet piles: superior durability to other steel wall geometries.

Superior Geometry for Durability:O-Piles save costs with easier application of corrosion protection, and by having a minimized exposed surface relative to other king pile shapes. Additionally, the interior of the pipe can be sealed off (capped or filled) from oxygen infiltration in order to avoid inside corrosion. And, concrete can be poured inside the O-Pile itself, thus further increasing strength while also preventing oxidation or corrosion on the interior surface. With any or all of these techniques, O-Piles have only the exterior face exposed to corrosion, in contrast to a traditional beam, which has all of its surfaces exposed to corrosive elements.

Optimizing Durability with Sacrificial Thickness:Sacrificial thickness is the number one choice for designers who need to meet design life criteria. Usually, one needs to apply additional steel to the entire exposed structure when it is actually only required on the most corrosion-vulnerable surfaces: the splash and low-water zones.

Why not just use a different grade of steel? Solutions utilizing steel grade compositions either work for the splash zone or the low-water zone, but not both. Therefore, additional measures are often needed, such as coatings or cathodic protection, which can lead to additional expense and complication.

With O-Pile, an optimal solution with targeted design life can be obtained without special steel grades, additional coating, or wasted “extra” steel. Thicker pipe used above the sea bed spliced to thinner pipe below allows the designer to target sacrificial thickness exactly where it is needed. With the small production tolerances of pipes, O-Piles can be easily spliced, maintaining consistent external diameter and variable inner diameter as necessary for sacrificial thickness. This gives the most efficient use of steel and the most cost-effective solution for durability. The location of the splice is usually above the sea bed where pile stresses are low.

O-Piles that are used in corrosive soil and/or water need only have a corrosion allowance factored for the exterior surface of the pile.

KEY:

Exposed Surface

Standard Combined Wall Systems

O-Pile

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O-Pile Solution Samples O-Pile Solution Samples by Pipe Specification

With

XL

Con

nect

ors

Name Gkg/m2

Wy cm3/m

Jy cm4/m

b mm

OD mm

t mm

O 51 163.4 5,145 231,503 1080 900 9

O 65 181.0 6,459 322,944 1180 1000 10

O 71 197.4 7,083 354,171 1180 1000 11

O 79 198.9 7,925 435,884 1280 1100 11

O 86 215.5 8,622 474,210 1280 1100 12

O 95 217.1 9,543 572,606 1380 1200 12

O 103 233.9 10,313 618,769 1380 1200 13

O 105 218.4 10,468 680,401 1480 1300 12

O 113 235.4 11,314 735,396 1480 1300 13

O 122 252.4 12,156 790,134 1480 1300 14

O 132 253.9 13,236 926,541 1580 1400 14

O 142 271.0 14,151 990,591 1580 1400 15

O 153 272.5 15,311 1,148,327 1680 1500 15

O 163 289.7 16,299 1,222,427 1680 1500 16

O 175 291.2 17,538 1,403,039 1780 1600 16

O 186 308.5 18,599 1,487,927 1780 1600 17

O 188 292.5 18,779 1,596,201 1880 1700 16

O 199 310.0 19,917 1,692,964 1880 1700 17

O 211 327.4 21,052 1,789,379 1880 1700 18

O 212 311.3 21,237 1,911,336 1980 1800 17

O 224 328.8 22,449 2,020,387 1980 1800 18

O 237 346.4 23,656 2,129,068 1980 1800 19

O 238 330.1 23,848 2,265,519 2080 1900 18

O 251 347.8 25,133 2,387,596 2080 1900 19

O 264 365.4 26,413 2,509,281 2080 1900 20

O 266 349.0 26,610 2,661,034 2180 2000 19

O 277 383.1 27,690 2,630,573 2080 1900 21

O 280 366.8 27,969 2,796,876 2180 2000 20

O 293 384.5 29,323 2,932,304 2180 2000 21

O 307 402.2 30,673 3,067,317 2180 2000 22

With

XX

L C

onne

ctor

s O 53 154.8 5,292 264,616 1300 1000 9

O 59 169.6 5,863 293,134 1300 1000 10

O 64 184.5 6,430 321,478 1300 1000 11

O 89 190.6 8,896 578,260 1600 1300 11

O 97 206.3 9,683 629,371 1600 1300 12

O 105 222.1 10,465 680,242 1600 1300 13

O 112 237.8 11,244 730,874 1600 1300 14

Formulas:

KEY:

Pipe Thickness

Pipe

Dia

met

er

mm 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

800 O 40 146.2

900 O 46 147.3

O 51 163.4

O 57 179.5

1000 O 58 164.6

O 65 181.0

O 71 197.4

1100 O 65 165.6

O 72 182.3

O 79 198.9

O 86 215.5

1200 O 80 183.4

O 88 200.2

O 95 217.1

O 103 233.9

1300 O 96 201.4

O 105 218.4

O 113 235.4

O 122 252.4

1400 O 114 219.5

O 123 236.7

O 132 253.9

O 142 271.0

1500 O 133 237.9

O 143 255.2

O 153 272.5

O 163 289.7

1600 O 143 238.9

O 154 256.4

O 165 273.8

O 175 291.2

O 186 308.5

1700 O 165 257.4

O 176 275.0

O 188 292.5

O 199 310.0

O 211 327.4

1800 O 188 276.0

O 200 293.6

O 212 311.3

O 224 328.8

O 237 346.4

O 249 364.0

1900 O 213 294.7

O 226 312.4

O 238 330.1

O 251 347.8

O 264 365.4

O 277 383.1

2000 O 239 313.5

O 252 331.3

O 266 349.0

O 280 366.8

O 293 384.5

O 307 402.2

O 40146.2

O-Pile: cm3/m/100kg/m2

These are examples from an endless variety of possible O-Piles.® Pipes can slightly vary in diameter and steel thickness.

Visit o-pile.com for custom solutions and calculations in both contiguous and combined sheet pile formats.

Wy = Jy / e

Jy =4D – d4

b64×

A =2

(D – d2

)4

×

b

G +pipe

G =

× 587.0A=G pipe

e = D / 2

b

D d

D, d, e: use values in cm b: use values in m

(all weight calculations shown feature an intermediate length ratio of 60% for connectors and alternating king piles)

(12.66 + 17.8) × R

WOM-XL = 12.66 kg/mWOF-XL = 17.8 kg/m

R = 0.6 (ratio)

Section Modulus:

Panel Weight:

GpipeR ×

2+

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Installing O-PileO-Piles are much easier to drive than is often thought: A simple panel is used for pipe alignment; and vibratory hammers, impact hammers and even press-in methods can be used to bring the piles to grade. Driving obstacles can often be removed from inside the pipes by excavation, drilling, or jetting, without disturbing the environment. Usually, even strict noise abatement standards can be easily met, even for urban settings.

Waterproofing O-PileIf your O-Pile project involves cofferdams, de-watering, tunnels, cutoff walls for site remediation, or any application where water leakage presents a challenge, then sealed O-Piles are an excellent solution. WADIT®, a globally-proven sheet piling interlock sealant, is highly effective in O-Pile interlocks and can meet the most challenging waterproofing needs.

The WOM/WOF-XL and -XXL connectors can be supplied already filled with WADIT, ready to be delivered to the pipe manufacturer, or to the job site, for welding onto the pipe piles. (The length from interlock to stem of the WOM/WOF-XL ensures that the sealant is not affected by heat generated from welding.) Applying WADIT in a factory environment is preferred, as it eliminates site preparation and application, and it speeds up construction.

WADIT sealant, used in conjunction with O-Pile pipes and connectors, is increasingly the “go-to” solution for engineers and designers looking for an effective waterproofing option that is strong, economical, safe and convenient.

WADIT can be used in every possible environment (from tropical to arctic) and is particularly effective in marine conditions.

=Watertight

WADIT

Simply put, O-Piles can be driven quietly and effectively with a wide range of equipment