Review article

The article analyzes the ways of ensuring the quality of works at construction of pile foundations in heterogeneous layers of thixotropic water-saturated soils. The authors propose using combined pile elements that contain longitudinal passage channels, muffled at the bottom end by a cement plug. To increase the pile bearing capacity or compensate for uneven deformations of foundation structures, the soil is cemented through channels in piles, under their tip to the necessary level of deepening in the support layer of soil. Thus, a combined pile is constructed, in the upper part of which it presents a factory made or bored element, and below its tip it is a soil-cement pile. The authors present the technology of constructing this pile at different technological modes. Comparison analysis of this pile is made on the engineering-economic indicators with the traditional solution as a back up pile. Stages of the work quality control that are implemented according to the new technology are offered.