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List of products by author: J. Su
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Adopting less is more principle for efficient design of Composite SCL Tunnels
Abstract: Composite SCL tunnels waterproofed by sprayed membrane have been constructed in stiff clay for several major projects in the UK. However, there is currently no design guidance nor reference literature on the optimal design of composite SCL tunnels. This paper fills this knowledge gap by presenting the results of a numerical parametric study focusing on the impact of tunnel shape and lining...
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Crack development and effect of ageing on performance of composite shell sprayed concrete tunnel linings
Abstract: Recent development and application of composite sprayed concrete lining (SCL) in major tunnelling projects have raised concerns on its short- and long-term flexural performance. Little literature has been found on the short-term crack development and the long-term ageing effect on composite SCL. Understanding of these issues will facilitate the efficient design of composite SCL. Four-point...
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Design of Sprayed Concrete Lined Shafts for Tideway Central Contract
Abstract: Tideway project is a new 25km long combined sewage storage and transfer system beneath the River Thames in Central London currently under design and construction. Three design and build contracts have been awarded. The contract for the central section, the biggest and most challenging one, consists of 12.7km of tunnel and 8 sites with deep inlet shafts and ancillary structures. A number of...
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Lining Thickness Optimisation for Composite SCL Tunnels
Abstract: This paper presents a composite SCL tunnel secondary lining thickness optimisation study. It first introduces the numerical model that simulates the behaviour of an SCL tunnel and the modelling strategy for the composite action between the primary and secondary linings. It then reports the influence of variation in the secondary lining thickness on the sufficiency of lining and interface...
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