ABSTRACT
With jet technology, formation of circular jackets around discrete foundations of buildings under reconstruction is entirely feasible. Such jackets restrict the lateral movement of soil, reduce the overall settlement of the foundations and concomitantly increase their bearing capacity. A stop must be put to the tendency to stabilise bases and strengthen foundations at any cost and in maximum measures only to avoid additional deformations due to the increased loads caused by reconstruction, neglecting computations to appraise their sufficiency and rationality. Furthermore, most of the organisations handling reconstruction jobs specialise only in works of zero cycle. Yet to provide all the builders with special equipment for strengthening bases and foundations would be neither economically nor technically expedient. An acute shortage in production of small-size equipment has long been felt for forming bored cast-in-situ or bored injection piles, which enable working in constrained conditions, including basements.
