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http://dx.doi.org/10.7843/kgs.2017.33.1.5

The Analysis of Skin Friction on Small-scale Prebored and Precast Piles Considering Cement Milk Influence  

Park, Jong-Jeon (Dept. of Civil and Environment Engrg., Yonsei Univ.)
Jung, Gyung-Ja (Korea Expressway Corporation Research Institute)
Jeong, Sang-Seom (Dept. of Civil and Environment Engrg., Yonsei Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.33, no.1, 2017 , pp. 5-15 More about this Journal
Abstract
Skin friction may be one of the most critical factors in designing the prebored and precast pile. Special attention was given to the interface behavior of cement milk-surrounding soil during the installation of prebored and precast pile. Small-scale field model pile test was conducted for the case of single pile. The size and geometry of the small-scale field model piles were designed with pile length 1.3m, boring diameter 0.067 m. Quick maintain-load test was conducted for the cases of boring diameter 150, 125, 90, 86, 74 mm and water-cement ratio 90, 70, 60%. It was shown that the bearing capacity of the pile increased as the cement-water ratio and cement milk thickness increased. Considering the scale effect between the small-scale model test and the actual construction site, it was found that cement milk thickness of 0.1~0.4D (50~200 mm) was reasonable for the stability of the structure. Also, the proper cement paste water / cement ratio was about 70% when considering the results of this study and quality control.
Keywords
Small-scale field model pile test; Prebored and precast pile; Load-settlement; Water/Cement ratio; Boring diameter;
Citations & Related Records
Times Cited By KSCI : 8  (Citation Analysis)
연도 인용수 순위
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