岩石隧道受震行為及破壞模式之研究(2/2)
Date Issued
2005
Date
2005
Author(s)
黃燦輝
DOI
932211E002008
Abstract
the earthquake analysis followed
by a seismic code has been taken into
account in the MRT tunnel design.
Except for the portion of portal or
shallow buried tunnel, the inner lining
with no reinforcement has been
considered in the tunnels located in
rocks regardless of their geological
properties. This means that it has no
seismic design and is also no seismic
code to be abided by. After 921 Chi-Chi
Earthquake, most damages, as
anticipation, happened in the portion of
portal, however, one needs to be careful
with the inner lining damages occurred
in the portion with higher overburden
which usually gives no damages in
accordance with the past experiences.
The famous example is the one
happened in the San-I Tunnel.
During the earthquake or an
ensemble of earthquake after shocks,
tunnel may exceed their functional and
structural limits due to the wave
propagation ways of surrounding
rock ,construction methods and
topographic effect .Therefore, various
issues on the behaviors and failure
modes of rock tunnel during the
earthquakes, have been brought to
discussion.
Taiwan is an earthquake-prone
country. Moreover, there are many
tunnels stretched a few hundred
kilometers long in Taiwan. Therefore,
the study on the earthquake resistant
analyses and designs of rock tunnels has
become more and more popular
nowadays.
Therefore, this research is aimed
by taking the results of numerous
scientific investigations in local and
overseas earthquakes, the shaking it
produced and its damaging effects in the
rock tunnels. Also taking into
considerations the various factors
causing the earthquake effects, the
analysis of earthquake mechanisms, with
the establishment of appropriate analysis
model, this research aims to understand
the structural seismic vulnerability of
rock tunnels when earthquakes occurred.
The results of this research include
the evaluation of the suitability and
limitations of the use of soil tunnel
seismic resistant design specifications to
rock tunnel design, a better
understanding of the rock tunnel
behavior such as the forms of
deformations, the support behavior and
the ability to withstand strong
earthquake motions. Also, this research
establish a summary on how the tunnel
behaves, and its ability to withstand
earthquake under different rock
classifications. This research will also
include some recommendations on rock
tunnel earthquake resistant design to
serve as a reference material in
tunneling engineering field.
Subjects
rock tunnel
seismic behavior
failure modes
Publisher
臺北市：國立臺灣大學土木工程學系暨研究所
Type
report
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