One-Dimensional Soil Column Simulation on Water Film Formation During Earthquake

Divyesh Rohit, Hemanta Hazarika, Chengjiong Qin, Tsubasa Maeda, Takaji Kokusho, Yuichi Yahiro

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The 2018 Sulawesi earthquake of magnitude Mw 7.5 triggered large-scale flow slides and ground liquefaction in the Palu Valley at multiple locations on a ground of very gentle gradient. Findings of the post event forensic geotechnical investigation conducted by the authors of this research highlighted the presence of silty clay or sandy clay layers sandwiched between sandy or sandy gravel layers at multiple locations in the flow slide zones. These sandwiched layers tend to have low permeability as compared to overlying and underlying layers sandy strata. To study the contribution of these sandwiched layers on the triggering of flow slides, a preliminary research was conducted using 1D soil column with clay and non-plastic fines sandwiched between sand layers. The findings highlighted that the excess pore water pressure reached its peak value by an instant shock. A thin interlayer water called water film is easily formed below the clay and non-plastic fines seam on impact. The influence of water film on pore pressure dissipation and overall soil settlement was studied. Water film formed beneath the clay and non-plastic seam permits the soil layer above it to float, with continuous deformation in soil due to change in equilibrium condition.

Original languageEnglish
Title of host publicationAdvances in Sustainable Construction and Resource Management
EditorsHemanta Hazarika, Gopal Santana Madabhushi, Kazuya Yasuhara, Dennes T. Bergado
PublisherSpringer Science and Business Media Deutschland GmbH
Pages693-703
Number of pages11
ISBN (Print)9789811600760
DOIs
Publication statusPublished - 2021
Event1st International Symposium on Construction Resources for Environmentally Sustainable Technologies, CREST 2020 - Fukuoka, Japan
Duration: Mar 9 2021Mar 11 2021

Publication series

NameLecture Notes in Civil Engineering
Volume144 LNCE
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

Conference1st International Symposium on Construction Resources for Environmentally Sustainable Technologies, CREST 2020
Country/TerritoryJapan
CityFukuoka
Period3/9/213/11/21

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering

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