The problem of lack of carrying power of foundations made in the past is an inseparable part of renovation of great structures located in urban areas. Injected piles (micropiles) have found wide application in this scope. Despite the introduction of standardization and numerous scientific works dedicated to this subject, the method of design leaves much to be desired in many cases and has a decisive influence on the correctness of work executed later and its eff ectiveness. The analysis presented in the article indicates the necessary scope of identification and design of micropiles in accordance with Polish standards and the current state of knowledge in the field of construction theory.
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In this paper was done the loading test results surway of injected micropiles and "jet grouting"s piles. These loading tests have been done on the structure realized by "Geoservice" Company from Wrocław. On the basis of the received results, the axial stiffness of the piles was described and the measured settlements were compared with the analytical solutions.
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