Liquefaction Hazard Mapping Based on LPI (Liquefaction Potential Index) At Jepara, Indonesia
Rini Kusumawardani1, Muhammad Zain Rais2

1Rini Kusumawardani*, Civil Engineering Department, Universitas Negeri Semarang, Semarang, Indonesia.
2Muhammad Zain Rais, Department, Civil Engineering Department, Universitas Negeri Semarang, Semarang, Indonesia.
Manuscript received on March 15, 2020. | Revised Manuscript received on April 02, 2020. | Manuscript published on April 10, 2020. | PP: 1611-1617 | Volume-9 Issue-6, April 2020. | Retrieval Number: E3063039520/2020©BEIESP | DOI: 10.35940/ijitee.E3063.049620
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Abstract: Liquefaction is a phenomenon of loss of strength of the soil layers caused by earthquake vibration. Liquefaction causes the soil to be in a liquid – like state, especially on sandy soil. Analysis of liquefaction potential was performed by using the semi-empirical method by calculating the Safety Factor (SF) based on Standard penetration Test (SPT) and Cone Penetration test (CPT) data. After the SF value was obtained, then the Liquefaction Potential Index (LPI) was calculated to determine the level of potential liquefaction in the study area to further produce a liquefaction potential map based on the liquefaction potential index. Based on the results of the calculation of the LPI, the level of liquefaction potential in the study area was very low when the earthquake magnitude is 5 Mw because the Liquefaction Potential Index (LPI) = 0. When the earthquake magnitude is 6 Mw, 7 Mw, 8 Mw, and 9 Mw, most of the investigation area has low potential level and there are some points that a high potential level. 
Keywords: Earthquakes, Liquefaction, Safety Factor, Liquefaction Potential Index
Scope of the Article: Earthquake Engineering