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General Report for TC206
Interactive Design
Rapport général du TC206
Le dimensionnement géotechnique interactif
Ho A.
Ove Arup & Partners Hong Kong Ltd
ABSTRACT: This General Report is to summarise the all papers submitted for TC206 – Interactive Design. A total of 15 papers were
received and 6 papers were recommended for oral presentation and the rest for recommended for panel presentation at the 18
th
ICSMGE Paris, 2-6 September 2013. The submitted papers gave a general picture of the interactive design works around the Globe
ranging from experimental and theoretical works from SWOT analysis to geoenvironmental application and potential risk detection
for Slope failure to case report on some successful practical works from excavation of diaphragm wall to fibre optic instrumentation
in reusing deep foundations. The papers are of good quality and will generate opportunities for the academia and practitioners to
discuss and question on various different techniques and approaches to implement interactive design to their works.
RÉSUMÉ : Ce rapport général présente une synthèse des communications correspondant au TC206 – Dimensionnement géotechnique
interactif. Un total de 15 articles ont été reçus, 6 ont été recommandés pour une présentation orale et les autres seront présentés lors de
la conférence correspondant à ce rapport général au 18
ème
CIMSG Paris, 2-6 septembre 2013. Les communications donnent une
description générale des travaux en dimensionnement interactif de par le monde, depuis les travaux expérimentaux et théoriques
jusqu’aux analyses SWOT, aux applications géoenvironnementales et à la détection des risques potentiels dans la réutilisation des
fondations profondes. La bonne qualité des communications créera des opportunités pour les universitaires et les praticiens de discuter
et échanger sur les différentes techniques et approches permettant de mettre en œuvre le dimensionnement interactif dans leurs
réalisations.
KEYWORDS: Observational method, SWOT analysis, monitoring, risk of slope failure, small-strain, fibre-optic sensing technology.
1 INTRODUCTION
A total of 15 papers were received by the TC 206 – Interactive
design and 6 papers were selected for oral presentation and the
other for panel presentation at the 18
th
ICSMGE, Paris, 2-6
September 2013. The submitted papers gave a general picture of
the interactive design works around the Globe ranging from
experimental and theoretical works from SWOT analysis to
geoenvironmental application and potential risk detection for
Slope failure to case report on some successful practical works
from excavation of diaphragm wall to fibre optic
instrumentation in reusing deep foundations.
The following section will highlight some keys in the
various papers submitted.
1.1
Papers recommended for oral presentation
Paper 1907 “Comparison of monitoring techniques for
measuring deformations in an excavation” by DeVos, Van
Alboon, Haelterman from Belgium. An online monitoring test
set-up was realized in a railway-infrastructure project site in
Anderlecht (Belgium). Both advanced and traditional
monitoring equipment were installed to measure the
deformation of a soil nailed jet grout wall, deformations behind
the jet grout wall (on the railway tracks) and forces in the soil
nails. The paper presents the results of the measurements in and
behind the jet grout wall and on the comparison between the
different techniques: FBGS; SAAF (in place inclinometer);
Optical strands OSMOS; Traditional inclinometer; Draw Tower
Grating; and BOTDR. It concluded that both new and
traditional techniques can lead to the same result, when
sufficient care is taken in the installation and interpretation. A
significant advantage can be seen when continuous monitoring
is applied, as the link with execution phases can be made.
The paper is clearly set out and well written and presents a
real site monitoring case and compares predicted with actual
deformation and bending moment results.
Paper 2397“SWOT analysis Observational Method
applications” by Korf, de Jong and Bles from Holland. A well
set out account of Strengths, Weaknesses, Opportunities and
Strengths of Observational Method and draws on a wide range
of published work. This research is performed as part of
“Geoimpuls” in the Netherlands; a joint industry programme,
with the ambitious goal to half the occurrence of geotechnical
failure in Dutch civil engineering projects by 2015. The
Conclusion are given in the form of “Go”, “No Go” listed in
terms of importance and “To be Overcome” items.
Paper 2029 “Experimental analyses on detection of potential
risk of slope failure by monitoring of shear strain in the shallow
section” by Tamate & Hori from Japan. The paper consider
monitoring locations at shallow depth of slope and introduces a
mean to monitor the failure of shallow portion of slope which is
particularly important during temporary cut. It may attract
discussions in how to bring this into practice so as to enhance
safety control measures to safeguard the workers during actual
construction stage. It would be good to have a paragraph
summarizing their findings from the experiment and / or any
further study that may be worthwhile, e.g. any suggested alert,
alarm and action shear strain to quantify the potential risk level.
Paper 3059 “The role of fibre optic instrumentation in the
re-use of deep foundations” by Bell, Soga, Ouyang, Yan and
Wang from UK & China. This paper provided details of a
recent project in London to further develop the understanding of
foundation reuse by installing fibre optic sensors in both
existing piles and a borehole to observe the impact of the
demolition process on the changes in piles behavior and ground
response. It explained how optical fibre instrumentation was
used to monitor pile and ground response under demolition and
presented the data captured by the fibre optic instrumentation
during the demolition process. It also showed how the use of
such instrumentation was fundamental to the successful reuse of
the existing piles on this project. It would be good to include the
limitations of fibre optic instrumentation; such as can it quantify
the vertical extent of section changes or the lateral position of
defects; the presence of vertical cracks. And percentage of
