| Title |
An Experimental Study on the Shear Failure Behavior of Post-installed Set Anchor for Concrete |
| Authors |
엄찬희(Um, Chan-Hee) ; 유승운(Yoo, Seung-Woon) |
| DOI |
https://doi.org/10.12652/Ksce.2014.34.2.0367 |
| Keywords |
후설치 콘크리트 앵커;세트앵커;전단파괴;매입깊이;앵커간격;연단거리;콘크리트 강도 Post-installed concrete anchor;Set anchor;Shear failure;Embedment depth;Anchor interval;Edge distance;Strength of concrete |
| Abstract |
An energy pile is one of the novel ground heat exchangers (GHEX's) that is a economical alternative to the conventional closed-loop vertical GHEX. The combined system of both a structural foundation and a GHEX contains a heat exchange pipe inside the pile foundation and allows a working fluid circulating through the pipe, inducing heat exchange with the ground formation. In this paper, a group of energy piles equipped with parallel U-type (5, 8 and 10 pairs) heat exchange pipes was constructed in a test-bed by fabricating in large-diameter cast-in-place concrete piles. In addition, a closed-loop vertical GHEX with 30m depth was constructed nearby to conduct in-situ thermal response tests (TRTs) and to compare with the thermal performance of the cast-in-place energy piles. A series of thermal performance tests was carried out with application of an artificial cooling and heating load to evaluate the heat exchange rate of energy piles. The applicability of cast-in-place energy piles was evaluated by comparing the relative heat exchange efficiency and heat exchange rate with preceding studies. Finally, it is concluded that the cast-in-place energy piles constructed in the test-bed demonstrate effective and stable thermal performance compared with the other types of GHEX. |