Abstract
Along with other advanced geotechnical technologies for the exploration of underground space, electro-discharge technology (EDT technology) is one of the fundamental in the field of the construction of auger-injection microcircuits, as well as the construction transformation of the properties of foundation soils with weak physical and mechanical characteristics. At the same time, having significant differences compared to other methods of subsurface development of buildings and structures, the geotechnical EDT technology has a number of advantages, such as: 1) increased specific soil load-bearing capacity; 2) constructability of the auger piles in any geotechnical conditions; 3) possibility of geotechnical works performance under restricted conditions. As a basic structure for the development of new technologies, it has a large scientific research potential for the purposes of introducing it into modern underground construction.
Highlights
The use of bases and foundations of increased bearing capacity is a topical task of modern geotechnical construction
Chemical injections are only relevant for structurally unstable soils
In modern geotechnical construction there is a wide demand for auger piles
Summary
The use of bases and foundations of increased bearing capacity is a topical task of modern geotechnical construction. Of all the existing foundation technologies, buried structures such as large diameter drill piles are the most in demand. The existing technologies of the arrangement of these piles allow achieving significant values of bearing capacity Fd. At the same time, it can be increased only by changing their length and diameter. An alternative to auger piles for high Fd values is electric-discharge piles (EDT piles). The expansion along the EDT pile may increase its bearing capacity. Each additional increase significantly increases Fd. by controlling the number of thickenings depending on stratification of geotechnical elements of the construction site, it is possible to achieve the required values of carrying capacity of EDT piles
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