Liquefaction analysis of abrasion protection structure in Padang

Abdul Hakam,Risayanti Risayanti,Junaidi Junaidi,Bayu M Adji,R Haigh,A Hakam,F.A Ismail,L Comfort

doi:10.1051/matecconf/201822901018

Abdul Hakam, Risayanti Risayanti + Show 6 more

Open Access

https://doi.org/10.1051/matecconf/201822901018

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Abstract

The liquefaction potential of a soil deposit is an important aspect to consider the stability of structure due to the earthquake. The liquefaction may also contribute to the safety of coastal constructions. The assessment of liquefaction potential can be started by having the physical properties of sandy soil that include grain size and density. Those parameters had known to give effects to the liquefaction resistance. Those physical properties of sand soil associated with liquefaction resistance must be tested in the laboratory. A case study of a real construction design in Padang, Indonesia is discussed here. The liquefaction potential was assessed using the Density-Grain size methods. The suggested solution to treat those problems is then provided. The compaction treatment to reach a certain relative density before the construction on site may avoid the liquefaction potential and save the coastal structure.

Highlights

One of the most dangerous occurrence causes of construction damage is liquefaction phenomenon in the saturated sand soil as happened to many constructions in Niigata (1964)
The method to estimate the liquefaction potential in the certain soil deposit the is suggested based on the liquefaction experience [1]
As explained by Al-Karni (2014) in his research [5], there is a change in the Stress-Strain behavior of sandy soil when the quick positive pore pressure builds up in the soil mass

Summary

Introduction

One of the most dangerous occurrence causes of construction damage is liquefaction phenomenon in the saturated sand soil as happened to many constructions in Niigata (1964). It has been summarized that for geologically new deposits of loose sands under the shallow groundwater table are very susceptible to liquefaction [6] It has been summarized the physical properties of soil that affect the potential of liquefaction such as histories, geological processes, soil types and sizes, density and stresses in the soil mass. A recent laboratory test on sandy soil has shown that the pore pressure due to liquefaction can increase such that the stresses in the soil reached it failure envelope. These phenomena are illustrated by the Mohr-coulomb circles (Fig. 2). This chart is used as an important tool in liquefaction potential for any soil deposit

Liquefaction analysis

The case study in Padang beach

Findings

Conclusions