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16 September
- 16 September 2021, Thursday
- 18:30 To 19:30
-
Online
- Presentations by Fu Jiajun, Amelia Loo & Vincent Zillianstetra
Event details
BACKGROUND OF TUCSS HULME PRIZE
The Hulme Prize was set up by TUCSS in 1999 in
honour of the late Mr. Terry Hulme, for his outstanding contribution to TUCSS
and Tunnelling in Singapore. It is an annual competition for the best technical
papers from young engineers or students on a subject associated with tunnelling
and underground construction. One first, second and third prizes each will be
awarded every year.
The winner(s) of the first prize paper will be presented with a cash prize of $1,000, second prize paper with $500 and third prize paper with $250, at the TUCSS Monthly Seminar 2021.
Out of the 7 papers submitted for the TUCSS Hulme Prize 2021 Competition, the following
three papers have been shortlisted:
1. Review of
Investigation Methods to Determine Pile Lengths
By Mr Fu Jiajun, Land Transport Authority
2. The Use of Classification Machine learning for Cone Penetration Test
Interpretation in a Singapore Context
By Ms Amelia Loo, Mott MacDonald
3. Testing of a Muck Pumping System for EPB TBMs for Thomson-East Coast
Line T307 Tunneling Works
By Mr Vincent Zillianstetra, Land Transport Authority
Three eminent judges will decide on the winners
after the presentations based on the submitted papers as well as their
presentations.
TIME AND PLACE
The presentation will take place online via Zoom
on Thursday 16 September 2021 at 18:30 hrs to 19:30 hrs.
INVITATION
This is the 22nd Hulme Prize presentations by TUCSS and is open to valid TUCSS Members only. Seats are on first-come-first-served basis and limited to 500 persons.
REGISTRATION
Members are to sign up for the seminar via
their TUCSS account on the TUCSS Website or TUCSS Mobile App. The details on
how to access the seminar will be sent to the members who has successfully
signed up for the seminar, at a date nearer to the seminar. The deadline for
registration is on Wednesday,
8 September 2021 or when total registered participants
reaches 500 whichever comes earlier.
*TUCSS Corporate Members
limited to 5 registrations only. For
TUCSS corporate members, please email us the following email information (Name,
TUCSS Corporate membership number, company name, email address, PE/RE/RTO
number if applicable)
ATTENDANCE POLICY
For members who require
certificate of attendance, please note of the attendance policy:
- Login at the
beginning of the seminar (link will be accessible at 18:15 hours)
- Evidence of
participation by video switched on throughout the seminar
- Complete the quiz
at the end of the seminar before logging out. The duration for the quiz is
15mins.
Certificate of Attendance will be uploaded to the member’s account after the compliance to the Attendance Policy is verified.
PDU/STU
Points have been applied and pending approval.
NOTE TO MEMBERS
Note
1:
Members are not required to indicate their names and TUCSS registration details
through Chat function. Members shall not send messages through Chat function
during the presentation.
Note 2:
Higher no-show was observed at the last TUCSS monthly seminar. As there are
limited openings for the seminar, members are urged to register for the seminar
only if they can attend the seminar.
Note 3:
For any suggestions/feedback to improve the online seminar, members are to
email to the secretariat.
Thank you.
PRESENTATIONS
Review of Investigation Methods to
Determine Pile Lengths
By Mr Fu Jiajun, Land Transport Authority
Abstract: The scarcity of aboveground space has driven most
transport infrastructures underground and beneath the densely built-up area
where underground obstruction such as pile foundations are expected during
construction. Underground obstructions impose additional risk to tunnelling
works and damaging the foundation can undermine the structural integrity of a
building. To mitigate the risk, it is crucial to know the length of the
undercrossed pile foundation, however the availability of as-built pile length
information is limited, hence foundation investigation is employed to determine
the depth of pile toe. The Land Transport Authority (LTA) of Singapore have
employed different methods to investigate the pile length depending on the site
conditions and foundation characteristics. Most of the interpreted pile lengths
were later evaluated to be in reasonable accordance with the as-built record.
This paper reviews the effectiveness and reliability of different methods that
are commonly employed in Singapore and can serve as a reference in the
selection of pile length investigation method(s).
About the presenter: Jiajun possess a B.E.
in Civil from Nanyang Technological University with over 3 years of experience
as a Geotechnical Engineer in transport infrastructure projects. He is driven
by his passion to understand the technicality of engineering works with a
detailed but balanced approach.
He is always ready to explore ‘new tools’ that can improve productivity and
reduce risk. In this aspect, he has developed several 3D geological models to
identify plausible zones of higher geotechnical risk and the use of geophysics
in detecting underground obstructions ahead of time to reduce construction
risk.
Jiajun is currently involved in the design aspects of the Cross Island Line
rail project.
The Use of Classification Machine
learning for Cone Penetration Test Interpretation in a Singapore Context
By Ms Amelia Loo, Mott MacDonald
Abstract: The idea and usage of
machine learning has become increasingly popular over the last decade.
Leveraging on this movement, we aim to apply these machine learning techniques
to geotechnics workflow to increase work efficiency and accuracy. In this
paper, we will be evaluating the use of multiclass random forest (RF) and
support-vector machine (SVM) algorithms in predicting geological
classification from cone penetrometer test (CPT) outputs. This study will
predominantly be focused on the following geological units sampled in the east
of Singapore - Fill, Made Ground, Marine Clay (M), Estuarine Materials (E),
Fluvial Sand (F1) and Fluvial Clay (F2) and the Old Alluvium (OA). At this
experimental and exploration stage, this machine learning tool is capable of
making contextualized pre-dictions, which when coupled with the geologist’s
technical experience, can aid in geological interpretation with time savings.
About the presenter: Amelia graduated from
Nanyang Technological University (NTU) with a degree in Environmental Earth
System Science, specializing in geosciences. She later joined Mott MacDonald as
an engineering geologist, where she undertook several major infrastructural
projects in Singapore – notably the North South Corridor. She has a keen
interest in data science and is exploring new methods to improve, optimize and
automate geotechnical analyses and processes.
Testing of a Muck Pumping System for EPB TBMs for Thomson-East Coast
Line T307 Tunneling Works
By Mr Vincent Zillianstetra, Land Transport Authority
Abstract: Land is scarce in
Singapore and roads have already taken up about 12% of the land area. The
Singapore Mass Rapid Transit (MRT) serves as the key to a sustainable transport
system with most of the lines built underground without the need for
significant land use. Throughout the tunnelling history in Singapore,
significant development in tunnelling techniques has taken place and new
technologies have been adopted to address the challenges of underground
construction in urban areas and in variable ground conditions. Earth Pressure
Balance (EPB) Tunnel Boring Machines (TBM) are widely used in Singapore as the
ground conditions are mostly Old Alluvium and Marine Clay. However, as the
tunnelling works are taking place in more congested urban areas, some measures
are required to reduce noise and disturbances to the nearby population.
Prospective T307 contractor at time of ten-der, Samsung C&T Corporation,
proposed to use a muck pumping system (solid matter pumps) for spoil
transportation from TBMs all the way to the surface muck pits as measure to
enhance productivity along with certain operational advantage, closed system
noise reduction at surface and smaller worksite, and the contract was awarded
on this basis. As part of demonstration of workability of the method, this
paper will introduce the preliminary testing for usage of a muck pumping system
as a means of transporting spoil in EPB TBMs for Contract T307 of Thomson-East
Coast Line.
He joined Singapore Land Transport Authority (LTA) in the year of 2011 and had been involved in various Singapore MRT projects namely Downtown Line Stage 2 (DTL2) Contracts C916 & C917A, and Thomson-East Coast Line Contracts T307 and T308. He has gradually built on his experience and has proactively involved in managing tunnelling projects with both Slurry Mixshield and EPB TBMs. He has experiences of managing challenges related tunnelling in Bukit Timah Granite rock and soft ground in Kallang Formation geology; and also managed the Contractor’s works to ensure safe and successful completion of the tunnelling projects. He was also involved as independent risk reviewer for SPPA Cable Tunnel safety submission.
Currently, Vincent is working at Principal Engineer with Geotechnical &
Tunnels division under LTA Infrastructure and Design Engineering group and has
been involved in geotechnical design for Cross Island Line project and also
technical review for Thomson-East Coast line (East Coast stretch).