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http://dx.doi.org/10.14481/jkges.2014.15.12.87

Experimental Study for Load Distribution Characteristics of Existing and Reinforcing Piles  

Cho, Seonghun (Department of Geotechnical & Geo-Space Engineering, Korea University of Science & Technology)
Choi, Kisun (Advanced Building Research Division, Korea Institute of Civil Engineering and Building Technology)
Cho, Samdeok (Geotechnical Engineering Research Division, Korea Institute of Civil Engineering and Building Technology)
You, Youngchan (Advanced Building Research Division, Korea Institute of Civil Engineering and Building Technology)
Choi, Changho (Geotechnical Engineering Research Division, Korea Institute of Civil Engineering and Building Technology, Department of Geotechnical & Geo-Space Engineering, Korea University of Science & Technology)
Publication Information
Journal of the Korean GEO-environmental Society / v.15, no.12, 2014 , pp. 87-95 More about this Journal
Abstract
Recently, there are increasing technical needs for foundation retrofit project such as vertical extension of apartment building. This paper focuses on the load distribution characteristics of existing and reinforcing piles when reinforcing pile is installed to the existing foundation. Allowable bearing load was initially applied on the foundation slab supported with four existing piles and then, one reinforcing pile was installed at the center of foundation slab and additional load was applied. The experimental results showed the Load Distribution Ratio (LDR) between existing and reinforcing piles converged after the applied load exceeded allowable bearing capacity of all piles. Laboratory tests were also performed for the cases of 60 %, 80 %, 100 % unloading level of allowable bearing load. After unloading step, one reinforcing pile was installed at the center of foundation slab and additional load was applied. The results showed that reloading load level at which LDR between existing and reinforcing piles converged decreased as the amount of unloading load increased.
Keywords
Reinforcing pile; Foundation retrofit; Vertical extension; Load distribution ratio;
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