Development of pile driving methods

A new generation of steel sheet pile with improved drivability ,higher structural reliability, and more economical merit compared with traditional U type sheet piles, is Hat-Type sheet pile 900 which has thin and large section shape of 900mm in effective width has been developed on the basis of state of the art rolling technology and design.

Development of Hat-Type sheet pile 900:

*Efficient pile-driving work;

Since this type is more rigid than conventional wide type sheet pile, pile deformation while the pile is driven into the ground is effectively restrained, and hence even longer pile can be driven in efficiently.

*Higher structural reliability;

Since the Hat-type sheet pile joints are at the outmost part of the wall structure, the natural axis of each of the piles coincidences with that of the wall structure formed. Therefore the “joint efficiency” (i.e., the decline in sectional performance ascribable to the sheet pile shape and joint position) that needs to be considered when the U type sheet pile is used may be left out of consideration. Thus Hat-type sheet pile 900 is able to display its structural performance under various construction conditions.

It enables a reduction in the amount of steel required per unit wall area. It also enables a reduction in number of sheet piles used, make it possible to shorten the construction period and cut construction costs. In addition, the new sheet piles allows for efficient structural design in which the joint efficiency need not to be taken into consideration.

The vibratory driving or the hydraulic jacking methods are commonly used to drive steel sheet piles into the ground.

In the vibratory driving method, as the hammer vibrates while chucking the top of the sheet pile, the vibration is transmitted to the sheet pile and ground, so that the sheet pile driven into the ground. This method is the most popular because it can shorten the construction time and can be applied even to hard ground.

The vibratory driving or the hydraulic jacking methods are commonly used to drive steel sheet piles into the ground.

In the vibratory driving method, as the hammer vibrates while chucking the top of the sheet pile, the vibration is transmitted to the sheet pile and ground, so that the sheet pile driven into the ground. This method is the most popular because it can shorten the construction time and can be applied even to hard ground.

Sheet pile which has already been driven into ground is used as the reaction to push another sheet pile statically into the ground. This method is suitable for low-vibration, low-noise pile-driving at construction sites in urban areas and for pile-driving at confined construction sites.

Sheet piles are structural tools which are designed to resist horizontal forces as they embedded in soils. They are also used as retaining systems. Sheet piles are made of different materials which plays an important role in their applications. Steel sheet pile is considered the most common type because of its advantages and providing higher structural reliability as well as workability. The Hat-Type sheet pile 900 is a structural steel product that incorporates the essence of sheet pile manufacturing technology and application technology relating to design and construction projects. Its application extends beyond conventional civil engineering works, such as river revetments and port piers. It also can be applied in different ways as measures to prevent ground subsidence. Promoting the Hat-Type sheet pile 900, contributes much to reduce construction costs and construction durations.

This article comes from EJGE edit released