Influence of technological parameters on the properties of jet grouting columns detected with full scale experiments

• Autorzy: Wanik Lidia , Bzówka Joanna , Modoni Giuseppe

Identyfikatory

DOI

10.24425/ace.2023.145276

Warianty tytułu

PL

Analiza wpływu parametrów technologicznych iniekcji strumieniowej na właściwości kolumn na podstawie pełnowymiarowych badań terenowych

• Języki publikacji: EN

Abstrakty

EN

Jet grouting induces a complex interaction between soil and injected fluids, and thus the properties of columns are dictated by a combination of the two systems. Aiming to improve the efficiency of projects and optimize execution, past research has focused on the prediction of the column properties understanding the mechanisms underlaying treatment execution. For the complexity of phenomena and the uncertain determination of soil properties, the question can be only partially addressed on the theoretical level, being important answers left to the empiricism of field trials, i.e. full scale experiments carried out to test specific jet grouting solutions on specific sites. The present paper reports the results of a field experiment whose peculiarity consists in being conceived to investigate the role of technology on a wider spectrum. Single and double fluid injection systems with various parameters have been simultaneously performed on a subsoil characterized by in situ tests. Columns have then been discovered to measure their diameter and samples of cemented material have been cored and subjected to uniaxial compressive tests. Results are herein summarized and compared with literature solutions to point out strength and deficiencies of currently adopted conceptual models.

PL

Technika iniekcji strumieniowej jest procesem wykorzystującym efekt przecinania i rozdrabniania gruntu pod działaniem strumienia zaczynu cementowego iniekowanego do gruntu. Ze wzgledu na złożoność procesu technologicznego istnieje potrzeba wyjaśnienia zjawiska zarówno na poziomie teoretycznym, jak również przeprowadzając pełnoskalowe badania eksperymentalne. W artykule przedstawiono wyniki badań terenowych wykonanych na przygotowanym poletku doświadczalnym. Szczególną uwagę zwrócono na rolę zmiennych parametrów technologicznych na właciwości geometryczne i mechaniczne kolumn iniekcyjnych. W tym celu wykonano 16 kolumn iniekcyjnych: 8 w systemie pojedynczym i 8 w systemie podwójnym. Kolumny, o długości 4 m każda, formowane były róznicując system iniekcji oraz parametry technologiczne: ciśnienie iniekcji, średnicę dysz iniekcyjnych oraz prędkość obrotową żerdzi iniekcyjnej. Następnie zostały one odsłonięte, oczyszczone i zinwentaryzowane. Dodatkowo z kolumn pobrane zostały rdzenie celem wykonania badan wytrzymałościowych. Artykuł przedstawia podsumowanie wyników badań eksperymentalnych porównując je z wartościami uzyskanymi na drodze przewidywań analitycznych.

Słowa kluczowe

EN

jet grouting; single fluid system; double fluid system; field trial test; geometry prediction; jet grouting column

PL

jet grouting; system pojedynczy; system podwójny; badanie terenowe; przewidywanie geometrii; kolumna iniekcyjna

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2023
• Tom: Vol. 69, nr 2
• Strony: 417--433
• Opis fizyczny: Bibliogr. 27 poz., il., tab.

Twórcy

autor

Wanik Lidia

• Academy of Silesia, Faculty of Architecture, Civil Engineering and Applied Arts, Katowice, Poland

• https://orcid.org/0000-0001-9474-7639

autor

Bzówka Joanna

• Silesian University of Technology, Faculty of Civil Engineering, Gliwice, Poland

• https://orcid.org/0000-0002-1765-7354

autor

Modoni Giuseppe

• University of Cassino and Southern Lazio, Faculty of Engineering, Cassino, Italy

• https://orcid.org/0000-0001-9200-2502

Bibliografia

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