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regarding the failure will have to be collected to prepare
the history of the failure.
Ch. 3: Diagnostic Tests: Depending upon the failure pattern
and assessed probable causes of failure, both in situ and
laboratory tests will have to be performed to reconstruct
the soil behaviour. For ex. large size plate load tests or
footing tests may need to be performed in both
saturated and partially saturated conditions using load
increments representative of the actual construction
stage. Laboratory Shear tests using stress path method
might become necessary under stress increment type of
loading conditions, similar to consolidation tests. Pore
pressure measurements might also have to be done.
Selection of soil strength parameters for design of earth
retaining structures will have to be reviewed. Hence,
selection of tests and their procedures should have
correlation with the type of project and the failure
pattern.
Ch.4: Back Analysis: From the failure pattern, a back analysis
will have to be performed using the new parameters
evaluated from the diagnostic tests so that the original
assumptions regarding the behaviour of the soil -
structure system can be verified. Procedures to be
followed for different types of structures may be
illustrated.
Ch.5: Instrumentation and Monitoring: The instrumentation at
the site will have to be done in conjunction with the
diagnostic tests. This stage gains importance while
assessing the immediate danger that might occur as well
as the assessment of the rate of progress of failure.
Typical instruments for measurements of deformation,
forces, etc., including their limitations have to be
illustrated with case histories.
Ch.6: Development of Failure Hypothesis: With the
background of the characteristics of the failure, results
of the diagnostic tests and back analysis, the most
probable causes for the failure have to be developed.
These causes should be correlated to different
rheological models for soil as well as for soil-structure
system so that the most probable process of failure can
be identified. A comprehensive short description of the
different rheological models may be included in this
chapter.
Ch.7: Reliability Checks : Importance of reliability checks in
investigation process may be highlighted.
Ch.8: Legal Process and Jurisprudence: Technical. ethical and
legal Issues.
Ch.9: FGE Case Histories - identification, investigation,
remediation and litigation.
Task forces and their leaders:
TF1: Collection of data – P.W. Day
TF2: Characterization of distress. – David Starr
TF3: Development of failure hypothesis. – J. Mecsi
TF 4: Diagnostic tests - W.F. Lee
TF 5: Back Analysis - M. Popescu
TF6: Instrumentation -- Yoshi Iwasaki
TF7: Reliability – S.K. Babu
TF8: Legal Issues – D.S. Saxena
TF9: Case Histories- R. Hwang,
Program of activities:
With the approval and encouragement given by the President
ISSMGE, Prof. Briaud, the team commenced the work in
December 2009 itself. The activities planned are:
A workshop on "Failures, Disputes, Causes, and Solutions in
Geotechnics" being organized by Prof. Mesci during 24-25,
September 2010, in Budapest.
A symposium on "Forensic Approach to Analysis of
Geohazard Problems" on 14-14 December 2010 in Mumbai,
India.- Organized by V.V.S. Rao.
Mr. David Starr, Prof. Lee , Prof. Popescu and Prof. Iwasaki
are planning to organize seminars/ Workshops during 2011
and 2012.
The organizers of ARC 2011 have been requested to assist
in organizing a session on FGE.
In the report on FGE compiled for TC40 (2004-2009) has a
number of case histories which will be sent to Prof. Zekkos.
TC303 - FLOODS
COASTAL AND RIVER DISASTER MITIGATION AND
REHABILITATION
Chair: Susumu Iai
TERMS OF REFERENCE
1. General
Technical Committee 303 (TC303) ‘Coastal and River Disaster
Mitigation and Rehabilitation’ (short name ‘Floods’) is a new
Technical Committee (TC) of the ISSMGE created for the
period 2009-2013 under the wider theme of ‘Impact on
Society’. TC303 continues the work of the former TC39
‘Geotechnical Engineering for Coastal Disaster Mitigation and
Rehabilitation’, which was focused on tsunami risk following
the 2004 Sumatra earthquake in Indonesia. TC303 on Floods
will build on the work of TC39 by addressing disaster
mitigation and rehabilitation measures not only for tsunami but
also for other sources of catastrophic flooding including
hurricane, rainstorm and storm surge induced riverine and
coastal flooding events, such as the 2005 Hurricane Katrina
disaster in New Orleans, USA or Typhoon Morakot, which
devastated parts of Taiwan in 2009.
TC303 will provide a forum for active participation by
individual members of ISSMGE to improve understanding of
the geotechnical engineering issues surrounding catastrophic
flooding events. The TC will achieve this objective through
three task forces, which will assimilate and disseminate
geotechnical engineering knowledge relevant to coastal and
river disaster mitigation and rehabilitation through publications
and a major conference to be held in Indonesia in 2011.
2. Terms of Reference
1) Disseminate knowledge and practice on coastal and river
disaster mitigation and rehabilitation to the membership of
the ISSMGE.
2) Establish guidelines and technical recommendations on
coastal and river disaster mitigation and rehabilitation.
3) Assist with technical programs of international and
regional conferences organized by the ISSMGE through
promotion to present the findings of the TC in main and
discussion sessions.
4) Interact with industry and other relevant organizations
working on coastal and river disaster mitigation and
rehabilitation.
3. Task forces and deliverables (Tentative)
Task Force 1 Completion of a book on ‘Geo-disasters in
Coastal Areas: Processes, Rehabilitation and
Case Histories’, a continuing project from
TC39;
Volume 6 - Page 155