Sheet piling produced to this specification is usually manufactured from coils, decoiled and fed through a multi stand (roll) forming mill at ambient temperature. Through innovation and benefits of latest technology, Cold Formed Steel Sheet Piling is formed by continuous flat steel strip rolled into corrugated profile at ambient temperature. The cold working by rolling process could increase the strength of material and good section properties per weight. Nowadays, cold formed steel sheet piling is widely used in the industry for piling foundation.

Cold formed steel sheet piling has the similar application as normal sheet pile, the purpose of using cold formed steel sheet piling is same as normal sheet pile too, it’s used to create a working space for the workers to work under ground level. Additional, method of installation for cold formed steel sheet piling should be the same as normal sheet piling as well.

Benefits For Cold Formed Steel Sheet Piling

1) Excellent strength / weight ratio to save construction cost.
2) Precise and proven interlocking system which ease the pile driving and forming continuous straight wall.
3) Flexible production process to offer product the client’s required length, strength and delivery schedule.
4) Roll forming technology guarantee superior surface finishes of sharp and clean contours without die marks.
5) Accurate dimension to meet even tight tolerances.

Applications For Cold Formed Steel Sheet Piling

1) Structural protection for canalization
2) Retaining wall system
3) Effective permeability cut off system or confinement walls at polluted site
4) Waterfront structure for port facilities & jetty
5) Locks and dam
6) Piled foundations
7) Temporary excavations
8 ) Trenches for sewerage and drainage works
9) Bridge abutments
10) Power plants construction
11) Construction of noise barrier

How To Process Cold Formed Steel Sheet Piling

1) Raw material i.e. steel strip is continuously fed in to machine line.

2) Cold formed steel sheet piling is formed by series of designed roller stations.

3) Sheet piling is formed into corrugated profiles to achieve strength and toughness.

4) Precise and consistence shape formed and readily used.

Types Of Cold Formed Steel Sheet Piling

1) OU Section

Advantage of OU Section Cold Formed Steel Sheet Piling :
i) An innovative sections for ease of installation adjacent to building.
ii) Suitably use for canalization work and river bank structural protection.
iii) Effective permeability cut off system.

2) OZ Section
OZ Sections formed continuous corrugation of web where specific location of the interlock symmetrically on both sides of the neutral axis. This will offer type of sections with effective section properties per weight.

Advantage of OZ Section Cold Formed Steel Sheet Piling :
i) An extremely competitive section modulus to mass ratio.
ii) Increased inertia, reducing deflection and allowing high-yield steels to be used for the most economical solution.
iii) Large width resulting in good installation performance.

3) OT Section

Advantage of OT Section Cold Formed Steel Sheet Piling :
i) The combination of great wave depth giving excellent statical properties.
ii) The symmetrical form of the single element has made these sheets particularly convenient for re-use.
iii) Easy fixing of tie rods and swiveling attachments, even under water.

Contractors use sheet pile as a temporary supportive wall which is used to support the soft soil collapsed from higher ground to lower ground. Sheet pile is commonly used in the construction and has variety types of material for sheet pile. The price for variety types of material for sheet pile is different, the driving method can be in variety ways as well. Contractors might need to determine the condition of soil then only can decide which type of sheet pile can be used.

Simple Guide On How To Install Sheet Pile

Sheet pile installation can’t be done by piling contractor while there is specialist contractor for sheet pile to do the installation. Here is a rough installation procedure for sheet pile :

1) Pile Driving Equipment
Before starting driving sheet pile, a few equipments have to be prepared such as driving hammers and jetting equipment. The driving energy for hammers shall be recommended by the manufacturer so that it’s applicable to relevant sheet pile. While jetting equipment shall have a minimum of two removable or fixed jets of the water or be a combination of air a water type.

2) Placing and Driving
After preparing all the sheet pile driving equipments, sheet piles can be started to place on the location that shown in the construction drawings. Temporary wales, templates, or guide structures have to be carried on to ensure the sheet pilings are placed and driven to the correct alignment.

After the sheet piles is set on place, jetting machine will be starting to driving the sheet piles. Sheet piles have to be driven with the proper size of hammer and by approved methods to ensure no damage to the sheet piles and proper interlocking throughout their lengths. A protecting cap shall be employed on the tops of sheet pile to prevent damage during driving with hammer.

3) Cutting-Off and Splicing
After driving the sheet piles into the ground, if contractor find that they need additional penetration, splicing or jointing works will be carried on. Driving works will be done again for the sheet piles until it reaches its’ limit on the ground. After this, excessive of sheet pile will be cutting-off and removed from the site. All cutting-off work must be done in a neat and workmanlike manner for safety purpose.

4) Inspection of Driven Piling
The contractor shall inspect the interlocked joints of driven sheet piles extending above ground. If contractor find out that the sheet piles are out of interlock, then the sheet piles have to be removed and replaced with a new sheet pile.

5) Pulling and Redriving
After the inspection of driven piling, another similar process has to be carried on which is called pulling and redriving. The contractor shall pull selected sheet piles to determine the condition of the underground portions of sheet piles. If contractor found any damages to the extent that its usefulness in the structure is impaired, then the sheet piles have to be removed and replaced with a new sheet pile.

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Source : Sheet Pile

Sheet pile is one of type of piling, one of the difference between normal pile and sheet pile is sheet pile used as temporary while normal pile used as permanent. Sheet pile can be made from many types of materials such as steel, plastic, wood, vinyl, recast concrete, and fiberglass. While the most common material to be used for sheet pile is steel sheet pile.

Sheet pile is act as a temporary supportive wall that been driven into a slope or excavation to support the soft soils collapse from higher ground to lower ground.

Sheet Pile Applications

Sheet piling can be applied in many common environmental applications, sheet piles are wisely used in the following fields of application :

* Retaining walls
* Bridge abutments
* Tunnels
* Pumping station
* Water treatment plants
* Basements
* Underground car parks
* Port facilities
* Locks and dams
* Waterfront structures
* Piled foundations
* Excavations and trenches
* Landfill
* Cofferdams
* Ground Water Diversion/Control
* Barrier for Ground Water Treatment Systems
* Containment Walls
* Flood Protection
* Coastal Protection
* Tunnel Cut and Cover
* Bulkheads and Seawalls
* Weir Walls
* Slope Stabilization
* Baffle Walls

Driving Method

There is few driving method for sheet pile driving such as pitch and drive, panel driving and staggered driving.

1) Pitch and Drive
Pitch and drive is the simplest method for sheet pile driving, it involves driving each sheet pile to full depth before pitching the next one. However it is only suitable for loose soils and short piles.

2) Panel Driving
The purpose of using panel driving is to ensure that the sheet piles are driven with good alignment and verticality. The risks of driving difficulties and problems of de-clutching also can be minimised.

Because a whole panel of piles has been pitched there is no need to drive all piles fully to maintain piling operations. If obstructions are encountered, individual piles can be left high without fear of disruption to the overall efficiency.

Panel driving is suitable for dense sands and stiff cohesive soils or in the case of potential obstructions.

3) Staggered Driving
In difficult soil conditions, panel installation combined with staggered driving is more suitable in driving process.

The piles are installed between guide frames and then driven in short steps as follows: piles 1, 3 and 5 first; then piles 2 and 4.

If the soil is very dense sand, gravel or rock, piles 1, 3 and 5 can be reinforced at the toe. In this case, these piles are always driven first and piles 2 and 4 in the second stage.

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Source : Napier | Sheet Pile