Abstract
The analysis of special conditions of buildings construction and transport constructions in difficult geotechnical and severe climatic conditions has been given. It is necessary to have a special working facility for earth excavation implementation. The bucketless bottom rotor with destructive elements in the form of oblique wedges meets these requirements. It allows destroying frozen and strong grounds with the least power-intensive way. The calculation method of ground separation force by angular teeth on the basis of spatial representation of ground failure forces has been given. The calculations have been confirmed with natural experiments of an excavator on frozen grounds.