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(사)한국터널지하공간학회

ISSN : 2233-8292

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Vol.18 No.1
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Case study of volume loss estimation during slurry tbm tunnelling in weathered zone of granite rock

(사)한국터널지하공간학회 / (사)한국터널지하공간학회, (P)2233-8292; (E)2287-4747
2016, v.18 no.1, pp.61-74
https://doi.org/10.9711/KTAJ.2016.18.1.061




& (2016). Case study of volume loss estimation during slurry tbm tunnelling in weathered zone of granite rock. (사)한국터널지하공간학회, 18(1), 61-74, https://doi.org/10.9711/KTAJ.2016.18.1.061
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Abstract

This paper presents a case study on the ground settlement and volume loss estimation for slurry pressure balanced shield TBM tunnelling in weathered zone of granite rock. Settlement at each stage of shield tunnelling was analyzed and the volume losses and settlement trough factors were estimated from observations. In addition, using the existing volume loss evaluation method in literature, volume losses were estimated considering ground properties and actual driving parameters. Most of ground settlement occurred during passage of shield skin passage and after backfill grouting, and the measured total volume loss and trough curves appeared to coincide with literature. Shield and tail loss obtained from field measurement were found to be around 90% and 60% of the predictions, where tail loss indicated larger deviation than shield loss.

keywords
Shield TBM, Ground settlement, Volume loss, Field monitoring, Face pressure, Backfill pressure, 쉴드TBM, 지표 침하, 체적손실, 현장 계측, 막장압, 뒤채움압

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