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http://dx.doi.org/10.7843/kgs.2006.22.5.69

An Experimental Study on the Reinforcement Effect of Installed Micropiles in the Surround of Footing on Dense Sand  

Lee Tae-Hyung (Dept. of Underground Structure, KISTEC)
Im Jong-Chul (Dept. of Civil Engrg., Pusan National University)
Publication Information
Journal of the Korean Geotechnical Society / v.22, no.5, 2006 , pp. 69-81 More about this Journal
Abstract
The micropile, which is a kind of the in-situ manufactured pile with small diameter of $150\sim300mm$, is constructed by installing a steel bar or pipe and injecting grout into a borehole. The application fields of micropile are being gradually expanded in a limited space of down-town area, because the micropile has various advantages with low vibration and noise in method and compact size in machine, etc. Mostly, the micropile has been applied to secure the safety of structures, depending on the increment of bearing capacity and the restraint of displacement. The micropile is expected to be used in various fields due to its effectiveness and potentiality in the future. The model test, focused on the interaction between micropile and soil in this study, was carried out. The micropile is installed in a soil adjacent to footing (concept of 'soil reinforcement'). With the test results and soil deformation analysis, the reinforcement effect (relating to bearing capacity and settlement) was analysed in a qualitative and quantitative manner, respectively. Consequently, it is expected that we nay demonstrate the improvement of an efficiency and application in the design and construction of micropile.
Keywords
Footing; Interaction; Micropile; Model test; Reinforcement effect;
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