Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Field Study on the Behavior Super-Long and Large-Diameter Grouted Drilled Shafts
Abstract This paper presents bi-directional O-cell loading tests on two super-long and large-diameter drilled shafts with diameter of 2 m and lengths of more than 110 m. The field test results show that the ultimate bearing capacity of the shaft after post-grouting at the shaft tip and side is 1.95 times that of the shaft without post-grouting, and the total side resistance and the base resistance of the shaft after grouting at the shaft tip and side are 183% and 280–314% larger than that of the shaft without post-grouting, respectively. Consequently, the combined tip-and-side grouting has a significantly effect to improve the bearing characteristics of super-long and large-diameter drilled shaft. As the load reaches the maximum test load, the proportion of the load carried by the shaft base is not more than 20% before and after combined grouting. Furthermore, the relationship between side resistance and shaft-soil relative displacement for super-long and large-diameter drilled shaft is described by the hyperbolic model, and this model is also used to capture the base resistance-base displacement relationship. In addition, the base displacement required to fully mobilize the base resistance for the shaft after combined grouting is about 1.0% of shaft diameter.
Field Study on the Behavior Super-Long and Large-Diameter Grouted Drilled Shafts
Abstract This paper presents bi-directional O-cell loading tests on two super-long and large-diameter drilled shafts with diameter of 2 m and lengths of more than 110 m. The field test results show that the ultimate bearing capacity of the shaft after post-grouting at the shaft tip and side is 1.95 times that of the shaft without post-grouting, and the total side resistance and the base resistance of the shaft after grouting at the shaft tip and side are 183% and 280–314% larger than that of the shaft without post-grouting, respectively. Consequently, the combined tip-and-side grouting has a significantly effect to improve the bearing characteristics of super-long and large-diameter drilled shaft. As the load reaches the maximum test load, the proportion of the load carried by the shaft base is not more than 20% before and after combined grouting. Furthermore, the relationship between side resistance and shaft-soil relative displacement for super-long and large-diameter drilled shaft is described by the hyperbolic model, and this model is also used to capture the base resistance-base displacement relationship. In addition, the base displacement required to fully mobilize the base resistance for the shaft after combined grouting is about 1.0% of shaft diameter.
Field Study on the Behavior Super-Long and Large-Diameter Grouted Drilled Shafts
Wan, Zhihui (Autor:in) / Dai, Guoliang (Autor:in) / Gong, Weiming (Autor:in) / Zhu, Mingxing (Autor:in)
01.01.2018
5 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Lateral Behavior of Post Grouted Drilled Shafts
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