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Interface parameters of composite sprayed concrete linings in soft ground with spray-applied waterproofing
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Su, Jiang and Bloodworth, Alan G. (2016) Interface parameters of composite sprayed concrete linings in soft ground with spray-applied waterproofing. Tunnelling and Underground Space Technology, 59 . pp. 170-182. doi:10.1016/j.tust.2016.07.006 ISSN 0886-7798.
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Official URL: http://dx.doi.org/10.1016/j.tust.2016.07.006
Abstract
The presence of a spray-applied waterproofing membrane between the primary and secondary lining layers is important to the behaviour of a composite sprayed concrete lined (SCL) tunnel in soft ground. In order to confirm the feasibility of the composite shell lining concept, the structural adequacy of the concrete-membrane interfaces under the effects experienced in a typical tunnel needs to be investigated.
This paper presents a series of laboratory tests on samples cut from composite sprayed concrete panels, to which uniaxial compression, direct tension and direct shear loadings are applied over both short and long-term timeframes under conditions of ambient atmospheric humidity. Test results show that the interfaces are capable of resisting significant compression, tension and shear in both short- and long-term. Failures under these actions should not occur in a typical shallow SCL tunnel, and a degree of composite action between primary and secondary layers should be expected. Influence of substrate
roughness and membrane thickness on the measured interface properties has been quantified. Overall,
this investigation confirms the existence of composite action for composite sprayed concrete linings in
soft ground, and provides parameters based on test results for further research and design.
Item Type: | Journal Article | ||||||||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||||
Library of Congress Subject Headings (LCSH): | Shotcrete, Waterproofing, Surface roughness | ||||||||||
Journal or Publication Title: | Tunnelling and Underground Space Technology | ||||||||||
Publisher: | Elsevier | ||||||||||
ISSN: | 0886-7798 | ||||||||||
Official Date: | October 2016 | ||||||||||
Dates: |
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Volume: | 59 | ||||||||||
Number of Pages: | 13 | ||||||||||
Page Range: | pp. 170-182 | ||||||||||
DOI: | 10.1016/j.tust.2016.07.006 | ||||||||||
Status: | Peer Reviewed | ||||||||||
Publication Status: | Published | ||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||
Copyright Holders: | Elsevier Ltd | ||||||||||
Date of first compliant deposit: | 23 September 2016 | ||||||||||
Date of first compliant Open Access: | 18 July 2017 | ||||||||||
Funder: | Mott MacDonald International Ltd. | ||||||||||
Adapted As: |
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