Indonesia is located at the convergence of three tectonic plates, making its territory vulnerable to earthquakes and susceptible to liquefaction. When liquefaction occurs, the soil loses its shear strength, leading to a reduction in foundation bearing capacity. This reduction also contributes to increased settlement of both the soil and foundation. Therefore, liquefaction must be considered in foundation design to ensure it can support the load from the superstructure while keeping settlement within allowable limits. The identification of soil layers at risk of liquefaction is carried out using correlation methods based on particle size distribution, employing the Chinese Criteria, Bray & Sancio Method (2006), and Tsuchida Method (1970). Additionally, liquefaction-prone zones are analyzed using methods developed by Seed et al. (J Geotech Eng Div, ASCE 11:1425–1445, 1985 [1]) and Youd and Idriss (J Geotech Geoenvironmental Eng 127:817–833, 2001 [2]). The analysis was assisted by the Midas GTS NX software. A linear static analysis was used for the condition that does not consider liquefaction, while a nonlinear time history analysis was used for the condition that considers liquefaction. If the shallow foundation rests on a liquefied soil layer, a significant settlement will occur, and the foundation will be considered to have failed. Conversely, when the foundation rests on a non-liquefied soil layer, it will remain stable and no foundation failure will occur.

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Soil Settlement Analysis in Response to Liquefaction by Comparing Pad Footing and Strip Footing Foundations

  • Darren Edwad Sutisna,
  • Alfred Jonathan Susilo,
  • Sunarjo Leman

摘要

Indonesia is located at the convergence of three tectonic plates, making its territory vulnerable to earthquakes and susceptible to liquefaction. When liquefaction occurs, the soil loses its shear strength, leading to a reduction in foundation bearing capacity. This reduction also contributes to increased settlement of both the soil and foundation. Therefore, liquefaction must be considered in foundation design to ensure it can support the load from the superstructure while keeping settlement within allowable limits. The identification of soil layers at risk of liquefaction is carried out using correlation methods based on particle size distribution, employing the Chinese Criteria, Bray & Sancio Method (2006), and Tsuchida Method (1970). Additionally, liquefaction-prone zones are analyzed using methods developed by Seed et al. (J Geotech Eng Div, ASCE 11:1425–1445, 1985 [1]) and Youd and Idriss (J Geotech Geoenvironmental Eng 127:817–833, 2001 [2]). The analysis was assisted by the Midas GTS NX software. A linear static analysis was used for the condition that does not consider liquefaction, while a nonlinear time history analysis was used for the condition that considers liquefaction. If the shallow foundation rests on a liquefied soil layer, a significant settlement will occur, and the foundation will be considered to have failed. Conversely, when the foundation rests on a non-liquefied soil layer, it will remain stable and no foundation failure will occur.