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http://dx.doi.org/10.9711/KTAJ.2017.19.5.799

A study on numerical modeling method considering gap parameter and backfill grouting of the shield TBM tunnel  

You, Kwang-Ho (School of Civil Environment Energy Eng., Univ. of Suwon)
Kim, Young-Jin (School of Civil Environment Energy Eng., Univ. of Suwon)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.19, no.5, 2017 , pp. 799-812 More about this Journal
Abstract
Backfill grouting and realistic convergence distribution were not properly considered in previous studies on 2D numerical analysis of a shield TBM tunnel. In this study, a modeling method was suggested to cope with this problem by considering a realistic convergence distribution and proper properties of backfill grouting. To this end, the influence of gap parameter and depth of rock cover on volume loss and composed of ground volume loss around tunnel excavation and surface volume loss were analyzed with a single layer of weathered soil. As a result, most of surface settlements were occurred immediately after excavation. Additional, as depth of rock cover and gap parameter increased, the influence range of surface settlement curves obtained from 2D numerical analyses became broader than a suggested theoretical equation. Therefore, it is inferred that gap parameter should be applied based on load distribution ratio and the property of backfill grouting properly considered for the estimation of the precise behavior of a shield TBM tunnel in 2D numerical analysis.
Keywords
Shield TBM; Gap parameter; Volume loss; Surface settlement; Backfill grouting;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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