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Sheet Piling

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Sheet Piling

Application: They are designed to create rigid barrier for earth or/and water, while resisting the lateral pressure of these (water, earth/soil) bending forces. The shape or geometry of a section contributes to structural strength. Hence, it can act as a retaining wall or structure. It can be used in place of retaining and diaphragm walls. It has wide applications in civil engineering/ foundation engineering field as sheet piling can be driven in almost all soil Conditions. Special site conditions where sheet piles are ideal are: In water (river/sea), no water pumping is allowed, uniform ground conditions. Faster speed, total project cost and time reduction, easy to use, adapt to any shape/size and reusability are the features which give extra edge over other technologies.

Importance: This technology is very useful in India. In metro cities like Mumbai, Delhi, Chennai and Kolkata, there is an acute shortage of space for car parking. A new concept of 'multiple basements' is picking up and plans are to go 8.0-12.0 meter (3-5 floors) below ground level. Hence to retain such huge soil sheet piling is used.
For instance, in case of Delhi Metro Rail Project, sheet piling for 12 m deep excavation is used. For one of the power projects, excavation up to 20 m from ground level (more than the height of a 7-storey building) is at planning stage. "Do you think it is possible without using sheet piling." This technology is extremely popular in developed countries. In general, their per capita steel consumption is very high, he added.
Sheet piles are available in four different materials viz. steel, wood, aluminium, PVC. However, steel sheet piles are more popular and commonly used throughout the world. It is more popular due to following reasons: Faster installation, reusability, easy to cut or lengthen, low height with high stability, scrap value, techno-commercial suitability, adaptability to take any shape/size.

Sheet piling consists of three main components: Sheet pile section/rammed section, driving equipment (which consists of a vibrator unit, power pack and clamming device in case of vibrator), crane/excavator for holding a vibrator unit.

Some typical applications of permanent sheet piling are: Water engineering: Ports (quay walls/ dock construction/dolphins), water eng. structures (locks/weirs/inlets-outlets), waterways (berth/ scour protection/retaining wall). Pollution control: Landfills (vertical sealed enclosure/tank enclosures), contaminated sites, noise abatements, water protection, (pumping stations/securing embankments). Construction & Transport: Road & rail (support walls/ramps/sunken roads/ ground water retention/noise protection walls

 
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