Criteria for face support of microtunneling TBMs

Title

Criteria for face support of microtunneling TBMs

 Author

Broere, W.

Faculty

Civil Engineering and Geosciences

 Department

Geoscience & Engineering

 Date

2013-09-04

 Abstract

Face stability of microtunnelling TBMs is an important aspect for a safe and controlled project execution. Lack of proper face support can lead to sudden collapse with resulting large settlements. Guidelines for minimal and maximal support pressures in most codes do not take the infiltration of bentonite suspension in coarser soils into account. Infiltration lowers the effectiveness of the face support. In loose sands infiltration can lead to excess pore pressures and induce liquefaction, with possible catastrophic consequences. This paper investigates the influence of infiltration and gives guidelines for a proper selection of bentonite suspensions based on soil gradation.

 To reference this document use:

http://resolver.tudelft.nl/uuid:40ab7f26-a249-425e-8b41-37cd60458e45

 Publisher

ISST

 ISBN

978-0-9871616-6-6

 Source

International NO-DIG Downunder 2013, The 31th international conference and exhibition, 1-4 september 2013, Sydney, Australia

 Part of collection

Institutional Repository

 Document type

conference paper

 Rights

(c) 2013
Broere, W.
Files
PDF 297152.pdf 690.05 KB
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