Task one A (Pile construction)
The first challenging problem that normally confronts the designer of any foundation is to
determine whether or not the conditions of the site are such that there is need for using the pile
system. The principle situation in which the piling system of the foundation may be needed have
been comprehensively illustrated. The most common cases that call for the use of the piling
system of the foundation is when the sub- soil is too much compressible or are just too weak to
provide support to the heavy vertical reactions. The transmission of the vertical reaction is from
the superstructure. In this particular case, the piles will serve as the extension of the columns or
the piers that aid in carrying the load to very deep substratum which is also very rigid. In cases
where such similar stratum does not exist, the transfer of the loads can be done gradually by the
system of the friction (Fernández, Torrens, Morales, and Martínez 2012).
The requirements for the use of the pile is because of the relative inability of the shallow footings
to aid in the transmission of the forces that are considered inclined and are basically
characterized by the overturning moments. Such situations are common features of the earth
retaining structures design with tall structures which are suspected to be subjected to high
earthquake or just very strong winds. The operation of the shaft is such that they resist the
upward forces by the use of the negative friction found around the shaft itself. The horizontal
forces are also getting resistance by either the vertical or the battered piles which normally
function as the structural system which combines the lateral resistance and the axial group of
forces (Tay, Panda, Paul, Noor, Tan and Leong 2017).

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