[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.7843/kgs.2021.37.11.7

A Study on the Bearing Capacitiy behavior of Large-diameter Drilled Shafts According to Various Ground Conditions under Pile Tip through Numerical Analysis Results

Kim, Chae Min (Dept. of Civil Engrg., Kyungsung Univ.)
Yun, Do Kyun (Dept. of Civil Environmental & Urban Engineering, Graduate School, Kyungsung Univ.)
Choi, Yongkyu (Dept. of Civil Engrg., Kyungsung Univ)

Publication Information

Journal of the Korean Geotechnical Society / v.37, no.11, 2021 , pp. 7-22 More about this Journal

Abstract

In this study, inverse analysis was performed on the bi-directional axial compressive load test conducted on drilled shafts. And the bearing capacities were analyzed by numerical analysis of various pile tip ground conditions of silt clay, silt sand, sand silt, sand gravel, weathered rock, and soft rock. The bearing capacities were analyzed using the P-S method, the Davisson method, and the allowable sttlement of 25.4 mm. The minimum allowable bearing capacities analyzed by three methods were found to be 19.64 MN ~ 24.96 MN. At this time, the base resistances were sharing a 2% ~ 12% of a head load, shaft resistance were shared 88% ~ 98% of the head load. The greater the strength of pile tip was found to increase the allowable bearing capacity. However, the difference between the maximum allowable bearing capacity and the minimum allowable bearing capacity was 5.32 MN, and the increase in the allowable bearing capacity was only 27% depending on the pile tip.

Keywords

Allowable bearing capacity; Bi-directional axial compressive load test; Drilled shafts; Elastic settlement of pile; Numerical analysis; The bearing capacity; Various pile tip ground conditions;

Citations & Related Records

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