19 - 20 March, 2013, Amara Hotel, Singapore
Register by 11 JAN 2013 and receive up to SGD 500 off!
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(includes refreshment break)
To improve the strength, stiffness and reduce the permeability of ground while
constructing underground structures close to existing structures techniques
such as grouting and ground freezing are used. Ground treatment is particularly
important when working below the ground water table in saturated ground.
However, treating unsatisfactory ground conditions in urban tunnelling always
increases costs and often can delay the project scheduling.
The workshop discusses the available techniques in ground treatment in
general, and in ground freezing and grouting in particular. The workshop
will discuss methods of assessing whether ground treatment is necessary or
likely to be beneficial and also methods for testing the effectiveness of ground
treatment and incorporating the results of ground treatment in predicting the
effect of tunnelling on existing structures.
Andrew Pickles is one of the founding Directors of GCG (Asia). He has twenty five
years’ experience in civil and geotechnical engineering on major projects in the UK,
Hong Kong, South East Asia and Southern Africa. During this time, he has worked
for consulting and contracting firms and client bodies. His experience includes the
design and construction of reclamations, retaining walls, deep excavations, cut
and cover and soft ground tunnels, piles and shallow foundations, earthworks
and ground treatment. In addition, has acted as an expert witness in construction
related disputes and mediations and he has wide experience interpreting site
investigation and monitoring data.
(includes lunch break)
From piling deformation to the loss in structural quality, structural damages
to buildings in close vicinity to urban tunnel construction sites are
prevalent. An improper or inadequate structural assessment leads to costly
delays, litigations and ineffective changes to route alignments.
An effective and early condition assessment regime, aided by new
analytical modelling techniques and instrumentation will greatly improve
the project’s timely delivery and the quality of construction. This workshop
will introduce the phenomenon of ground movement against different types
of tunnelling methods and then discuss the methodology in the prediction of
ground displacement based on empirical and numerical approaches.
It will also present the patterns of ground movement in different soil conditions
based on previous experience and finally discuss the use of building
damage classification method based on building strains and will also touch on
building monitoring and instrumentation.
Head of Tunnels & Ground Engineeing
Eric has over 19 years’ experience in the study, design and construction management
of large infrastructure projects in different parts of the world including several major
tunnelling projects and has managed major multidisciplinary projects in Hong Kong.
He has particular expertise in design of soft ground and rock tunnels constructed
by various methods including TBM (Compressed air, EPBM, slurry and double-shield
hard rock machine), cut and cover, pipe-jacking, Horizontal Directional Drilling
(HDD) and drill and blast methods. He has experience in underpinning works
for buildings, cavern design (large span rock tunnels), deep shafts design and
damage risk assessment of tunnel works adjacent to structures.
His involvement in various Hong Kong tunnel projects includes: SIL C902, HATS 24,
Lai Chi Kok Transfer Scheme, West Island Line, Express Rail Link, Kowloon Southern
Link, Shatin to Central Link and West Rail Projects for KCRC, Central-Wan Chai
Bypass Tunnel and P2 Underpass for CEDD and various cable tunnels (by HDD/TBM/
Pipe Jacking method) for CLP.
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