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Journal : Civil Engineering Dimension

Evaluation of ASTM D 1143/D 1143M-07 and Chinese Code JGJ 106-2014 for Pile Load Testing using Finite Element Method Aswin Lim; Octavianus Arvin Sukiwan
Civil Engineering Dimension Vol. 25 No. 2 (2023): SEPTEMBER 2023
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/ced.25.2.126-134

Abstract

Pile foundation is a structural element utilized to transmit structural load into the soil mass. During design processes, many empirical equations used to estimate axial pile capacity, and a pile load test is conducted to validate the design. In Indonesia, it is common to adopt ASTM D 1143/D 1143M-07 for pile testing. Chinese Code JGJ 106-2014 is another viable option, which has gained popularity recently. This study investigated the load–settlement curves obtained using both codes. The analyses were simulated using the Mohr–Coulomb and the Hardening Soil models. The Hardening Soil model yielded more reasonable load–settlement and load–excess pore water pressure curves than the Mohr–Coulomb model. The reason due to the Mohr–Coulomb model unable to capture the non-linear behavior of soil properly. Furthermore, the results showed that ASTM D 1143/D 1143M-07 and JGJ 106-2014 yielded comparable results. Hence, both methods could be substituted each other.
Evaluation of Basal Heave Stability for Deep Excavations in Clay using the Discontinuity Layout Optimization Method Susiyanti, Angela Dewi Maharani; Lim, Aswin
Civil Engineering Dimension Vol. 28 No. 1 (2026): MARCH 2026
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/ced.28.1.83-100

Abstract

clay soils, which often causes significant ground movement and threatens nearby structures. Traditional analysis methods generally assume homogeneous soil conditions and ignore the variation of strength with depth, which limits their application in complex field situations. This research investigates basal heave stability using the Discontinuity Layout Optimization (DLO) method, which identifies critical failure mechanisms by optimizing potential discontinuities in the soil mass. The research examines the influence of undrained shear strength (Su​), its gradient, and the excavation width-to-height ratio (B1​/H) on the safety factor, considering homogeneous and layered soil models. Results show that the safety factor increases with higher Su​ values but decreases as B1​/H increases. While the DLO method provides reliable predictions for homogeneous soils, but it shows limitations in layered soils. Therefore, for more accurate results in complex stratigraphy, integrating DLO with the Finite Element Method (FEM) is recommended.