Geotechnical monitoring results of 22-storey buildings on combined strip pile foundations with prestressed soil bases

Abstract

The article describes the concept of combined strip pile foundations with prestressed soil bases by pressing them with the cement mortar. The soil base pressing makes it possible to regulate and control the soil stress-strain state by creating prestresses that allow increasing the rigidity of the soil base and reduce the level of the base settlement and deformations of the above-ground part, the values of which determine the operational suitability of structures and their technical and economic indicators. The authors present the results of the applied combined strip pile foundation implementation in Tyumen (Russia) during the construction of two 22-storey high monolithic-frame apartment buildings as an alternative to pile-raft foundations based on composite driven piles, which helps to reduce the estimated cost and timing of the foundation constructions. Also the article describes the construction operations and contains the geotechnical monitoring results, which confirmed the operational reliability of the implemented solutions.