Si Shen
Tips for complex analytical modelling in civil engineering
This blogpost shares a few tips about modelling from personal experience
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The Si-Eng
Si's civil engineering blog
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Si Shen
Jun 292 min read
Properties of slurry for TBM tunnelling
What is slurry used in TBM tunnelling? The slurry used in TBM tunnelling is basically a water-based suspension fluid with added solids...
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Si Shen
May 252 min read
How high density slurry help mitigate tunnelling risks
Why slurry can support tunnel face? The reason why slurry can be used as an effective medium of face support, is because of the ‘filter...
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Si Shen
Feb 28, 20232 min read
TBM face intervention
Once the TBM gets started, it usually stops from time to time for a procedure called ‘face intervention’
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Si Shen
Jan 6, 20234 min read
TBM selection in rock conditions
For tunnelling operations in self-standing ground, three arch-types of TBMs can be used: open, single shield and double shield
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Si Shen
Aug 7, 20222 min read
Annulus grouting behind tunnel segments
Annulus grouting (also called back grouting or tail-skin grouting) is the grouting around the tunnel annulus – the backfilling of the gap...
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Si Shen
May 15, 20222 min read
Tunnel segment geometry (1)
main consideration factors around the segment thickness, radial length and longitudinal length
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Si Shen
Apr 12, 20222 min read
TBM selection under specific scenarios
pros and cons between EPB TBMs and slurry TBMs under specific scenarios of consideration
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Si Shen
Jan 31, 20223 min read
Convergence confinement method (3)
This blog will complete this series by discussing some practical uses of the Convergence-Confinement theory
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Si Shen
Jan 12, 20222 min read
Convergence confinement method (2)
the in-situ stress of the ground will be shared between the ground itself and the supporting structure once the tunnel is done
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Si Shen
Jan 3, 20223 min read
Convergence confinement method (1)
What convergence and what confinement? Convergence-Confinement is a well-known theory in tunnelling, and widely applicable regardless of...
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Si Shen
Oct 25, 20214 min read
TBM selection - EPB and Slurry
Selecting the ‘right’ TBM is all about maximising efficiency and minimising risk
3,674 views0 comments
Si Shen
Aug 9, 20214 min read
Instrumentation and monitoring - an overview
Instrumentation and monitoring is an essential link of risk management in the cycle of design and construction
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Si Shen
Jun 7, 20213 min read
Ground water in underground construction
groundwater is a thorny problem for almost all underground constructions
355 views0 comments
Si Shen
May 2, 20214 min read
Sprayed concrete – what’s special about it?
This post is a study note based on various sources rather than professional advice, and may not be reflective of the most up-to-date...
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Si Shen
Mar 9, 20213 min read
Top 5 unique challenges of designing underground structures
In the underground world, being apparently accurate in the calculation process is usually meaningless.
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Si Shen
Dec 27, 20204 min read
Fire engineering for concrete structures
This blog post outlines the overall fire engineering approach and touches on some basic principles.
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Si Shen
Aug 26, 20201 min read
What structural engineers need to know about waterproofing membrane
the membrane is a delicate thing and requires a lot of careful detailing and handling.
248 views0 comments
Si Shen
Dec 14, 20193 min read
Universal engineering principles
I believe it is essential for engineers to develop the habit of zooming out from their routine designs and re-think at a higher level of...
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Si Shen
Jun 4, 20193 min read
Stress concentration around openings
On many occasions, an opening needs to be created in a structure. This could be a tunnel from a station box, a cross passage tunnel from...
613 views0 comments
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