An Experimental Study on Bearing Capacity of Drilled Shaft with Mid-size

IF 0.4 Q4 ENGINEERING, GEOLOGICAL Journal of the Korean Geosynthetic Society Pub Date : 2019-01-01 DOI:10.12814/JKGSS.2019.18.4.263
K. Lee, S. You, Jeongjun Park, Jung-Mann Yun, G. Hong
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引用次数: 1

Abstract

This paper describes the results of bearing capacity using field loading test of pile, in order to extend the applicability of drilled shaft with mid-size, and the results were compared with the prediction results of design bearing capacity by empirical formular. The static load test result showed that the allowable bearing capacity of high pile strength was about 2.4 times higher than that of low pile strength. The dynamic load test result showed that the allowable bearing capacity of high pile strength was about 1.4 times∼1.5 times higher than that of low pile strength. The comparison result of allowable bearing capacity between static and dynamic load test showed that the difference of allowable load ranged from 3% to 6% under the same settlement conditions. As a result of comparing the ultimate bearing capacity by load test and design bearing capacity, it was found that the FHWA proposed equation could be more reasonable than the other proposed equation in load sharing ratios of end bearing and skin friction.
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中等尺寸钻孔井承载力试验研究
为了扩大中等尺寸钻孔井的适用性,本文采用现场荷载试验方法对桩的承载力进行了分析,并与经验公式计算的设计承载力预测结果进行了比较。静载试验结果表明,高强度桩的许用承载力约为低强度桩的2.4倍。动载试验结果表明,高强度桩的容许承载力比低强度桩的容许承载力约高1.4 ~ 1.5倍。静、动荷载试验的许用承载力对比结果表明,在相同沉降条件下,许用荷载的差异在3% ~ 6%之间。通过荷载试验极限承载力与设计极限承载力的比较,发现FHWA提出的方程在端部承载分担比和表面摩擦分担比上比其他提出的方程更为合理。
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