Experimental verification of integrity of low-pressure injection piles structure – pile internal capacity

• Autorzy: Pachla H.

Identyfikatory

DOI

10.1515/sgem-2017-0038

• Języki publikacji: EN

Abstrakty

EN

The idea of strengthening the foundation using injection piles lies in transferring loads from the foundation to the piles Anchorage in existing structure and formed in the soil. Such a system has to be able to transfer loads from the foundation to the pile and from the pile onto the soil. Pile structure often reinforced with steel element has to also be able to transfer such a loading. According to the rules of continuum mechanics, the bearing capacity of such a system and a deformation of its individual elements can be determined by way of an analysis of the contact problem of three interfaces. Each of these surfaces is determined by different couples of materials. Those surfaces create: pile-foundation anchorage, bonding between reinforcement and material from which the pile is formed and pilesoil interface. What is essential is that on the contact surfaces the deformation of materials which adhere to each other can vary and depends on the mechanical properties and geometry of these surfaces. Engineering practice and experimental research point out that the failure in such structures occurs at interfaces. The paper is concentrating on presenting the experiments on interaction between cement grout and various types of steel reinforcement. The tests were conducted on the special low pressure injection piles widely used to strengthen foundations of already existing structures of historical buildings due to the technology of formation and injection pressure.

Słowa kluczowe

EN

contact surface; foundation design; low-pressure injection pile; pile internal capacity

• Wydawca: De Gruyter
• Czasopismo: Studia Geotechnica et Mechanica
• Rocznik: 2017
• Tom: Vol. 39, nr 4
• Strony: 77--85
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Pachla H.

Bibliografia

• [1] PACHLA H., Conditions of proper interaction of low-pressure injection piles (LIP) with structure and soil, carrying capacity of pile anchorage foundation, Studia Geotechnica et Mechanica, 2016, Vol. 38, No. 4, 33-49.
• [2] DOWLING P.J., ELNASHAI A.S., CARROLL B.C., A New Pressurised Grouted Connection for Steel Tubulars, Journal of Constructional Steel Research, 1983, Vol. 3, No. 3.
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• [4] DALLYN P., EL-HAMALAWI A., PALMERI A., Wear in large diameter grouted connections for offshore wind Energy converters, Proceedings of the 10th International Conference on Advances in Steel Concrete Composite and Hybrid Structures, Singapore: National University of Singapore, 2012, 8.
• [5] PHILIPPONNAT G., Methode pratque de calcul d`un pieu isole a l`aide du penetrometer statique, Revue Francaise de Geotechnique, 1980, 10, 55-64.
• [6] BUSTAMANTE M., GIANESELLI L., Pile bearing capacity predictions by means of static penetrometer CPT, Proc., 2nd European Symp. On Penetration Testing, ESOPT-II, Amsterdam, The Netherlands, 1982, Vol. 2, 493-500.
• [7] GWIZDAŁA K., STĘCZNIEWSKI M., DYKA I., Wykorzystanie sondowań statycznych do obliczania nośności i osiadań pali, Nowoczesne Budownictwo Inżynieryjne, 2009, 4(25).
• [8] GWIZDAŁA K., Fundamenty palowe, technologie i obliczenia, t. 1, Wydawnictwo Naukowe PWN, Warszawa 2010.
• [9] PN-83/B-02482. Fundamenty budowlane. Nośność pali i fundamentów palowych.
• [10] PN-EN 1997-1:2008, Eurocode 7 Geotechnical Design, PKN, Warsaw, Poland.
• [11] PN-B-03300. Konstrukcje zespolone stalowo-betonowe. Obliczenia statyczne i projektowanie. Polski Komitet Normalizacyjny, August 2006.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).