Numerical Simulation of Liquefaction Mitigation by Using Grout Under Existing Building

Myat Myat Phyo Phyo, Hemanta Hazarika, Hiroaki Kaneko, Tadashi Akagawa

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

Abstract

Ground improvement using jet grout columns is a well-known technique to mitigate liquefaction hazard in sand stratum under existing building. However, the performance of conventional jet grout reinforcement technique has not achieved the sufficient level yet in terms of reducing shear strains and excess pore water pressure generated within the liquefiable soil layer. Therefore, a new countermeasure method, using small diameter jet grout column with additional horizontal slab, is introduced to control the shear deformation and excess pore pressure more effectively. To determine the efficiency of the new countermeasure method, numerical studies on unimproved and improved ground were separately performed in this study. The effectiveness of jet grout column with horizontal slab was evaluated by comparing the changes in excess pore water pressure, acceleration as well as distribution of shear stress and shear strain in the liquefiable soil before and after improvement. The results showed that the new liquefaction mitigation method offers positive effect on control of excess pore water pressure and shear deformation.

Original languageEnglish
Title of host publicationProceedings of the Indian Geotechnical Conference 2019 - IGC-2019
EditorsSatyajit Patel, C. H. Solanki, Krishna R. Reddy, Sanjay Kumar Shukla
PublisherSpringer Science and Business Media Deutschland GmbH
Pages557-568
Number of pages12
ISBN (Print)9789813364431
DOIs
Publication statusPublished - 2021
EventIndian Geotechnical Conference, IGC 2019 - Surat, India
Duration: Dec 19 2019Dec 21 2019

Publication series

NameLecture Notes in Civil Engineering
Volume136 LNCE
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

ConferenceIndian Geotechnical Conference, IGC 2019
Country/TerritoryIndia
CitySurat
Period12/19/1912/21/19

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering

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