Conference Universitas Islam Indonesia (UII)
CE ReForm

Pemodelan numerik 1D dan 2D dalam analisis potensi likuefaksi berdasarkan rasio tekanan air pori

Date Published : 30 July 2026
paper-cover

Contributors

Rahma Apriyani

Universitas Gadjah Mada
Author

Fikri Faris

Correspondence Author

DOI

DOI /4cy8fg03

ISBN

2962-2697

Keywords

Plaxis 2D Pore water pressure ratio Liquefaction Numerical modeling

Proceeding

Vol. 6 No. 1 (2026): The 11th CE ReForm

Track

General Track

License

Copyright (c) 2026 CE ReForm

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Abstract

The Bantul Earthquake in 2006 triggered liquefaction phenomena in 
Bantul, Sleman, and Klaten. Section 1 of the Yogyakarta – Bawen Toll 
Road construction with at-grade and elevated road structures is located 
in Sleman, which is categorized as a zone of moderate susceptibility to 
liquefaction. The elevated road is constructed above the Selokan 
Mataram, an irrigation canal with historical and cultural heritage of 
Keraton Yogyakarta. The P-28 structure, as one of the closest to the 
irrigation canal wall was selected as the study location for liquefaction 
potential analysis because the presence of the irrigation canal near the 
structure significantly increases the excess pore water pressure ratio, 
which may trigger liquefaction. Liquefaction potential analysis based on 
the excess pore water pressure ratio was analyzed using the empirical 
method by Yegian and Vitelli (1981) and using one-dimensional (1D) and 
two-dimensional (2D) as numerical methods with numerical modeling 
approaches based on the PM4Sand constitutive model in PLAXIS 2D. The 
results show that the empirical method is more conservative in estimating 
the excess pore water pressure ratio (ru) because the increase in the ru is 
only based on the safety factor. The results of the 1D and 2D numerical 
modeling showed that the distribution of the increase in ru > 0.8 was 
significantly different in each soil layer. 2D modeling is more 
representative for calculating the increase in ru > 0.8 because it reflects 
the field conditions at the P-28 location which has differences in thickness 
within similar soil layers and includes the existing irrigation canal which 
can increase the liquefaction potential.

References

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How to Cite

Apriyani, R. (2026). Pemodelan numerik 1D dan 2D dalam analisis potensi likuefaksi berdasarkan rasio tekanan air pori. CE ReForm, 6(1), 400-409. https://doi.org//4cy8fg03