Adhesion Factor of Large Diameter Bored Piles in Soft to Stiff Clay in the Sei Alalak Bridge Replacement Project‒South Kalimantan, Indonesia

International Journal of Civil Engineering

© 2021 by SSRG - IJCE Journal

Volume 8 Issue 6

Year of Publication : 2021

Authors : Andika Mulrosha, Yulian Firmana Arifin

10.14445/23488352/IJCE-V8I6P105

How to Cite?

Andika Mulrosha, Yulian Firmana Arifin, "Adhesion Factor of Large Diameter Bored Piles in Soft to Stiff Clay in the Sei Alalak Bridge Replacement Project‒South Kalimantan, Indonesia," SSRG International Journal of Civil Engineering, vol. 8,  no. 6, pp. 38-47, 2021. Crossref, https://doi.org/10.14445/23488352/IJCE-V8I6P105

Abstract:

The purpose of this research was to determine the adhesion factors of soft to stiff clay using both analytical and numerical methods. The data used was from the Sei Alalak Bridge Replacement Project in Banjarmasin, South Kalimantan, which included a field investigation of the bi-directional loading test. The result was analysed using Davisson and Chin methods to obtain the bearing capacity of the pile. Furthermore, the disturbed and undisturbed sample data were used as drilling results at points BH-04 in the bridge's pylon structure. Using field tests and soil data, the adhesion factor was back-calculated using empirical equations proposed by some researchers. Moreover, Plaxis 2D was used in the numerical analysis model. The average adhesion factors in the sub-layers calculated from these two points are 0.943 in the upward position and 0.191 in the downward position at B7. The adhesion factors obtained are very similar to Kulhaway and Jackson's data (1989). Furthermore, PLAXIS 2D Modeling produces adhesion factors of 0.97 and 0.94 in very soft clay and soft clay layers, respectively, while 0.56 and 0.48 in stiff clay and very stiff clay. These adhesion factor distributions resemble those reported by Kulhawy and Jackson (1989) and Coduto (1989).

Keywords:

bored pile, adhesion factor, shear strength, finite element method, PLAXIS 2D

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