The mechanical principle and failure characteristics
of progressive collapse of the shield tunnel are important. Thus, three methods
of singlecase analysis, fault tree analysis (FTA), and event tree analysis
(ETA) are used to analyze the characteristics of progressive collapse of shield
tunnel. The analysis of five major shield tunnel collapse cases in China and
abroad show that the failure process of shield tunnel structure has obvious nonproportionality and continuity characteristics, with the nature of
the progressive collapse. The FTA results of cases show that the progressive
collapse of the shield tunnel is usually due to the leakage of lining structure
under specific stratum conditions. Finally, the process of shield tunnel
collapse is divided into four events by ETA, and the interaction mechanism
between soil erosion and structure in the collapse process of tunnel structure
is discussed.
LIU Xian
,
SUN Qihao
. Characteristics Analysis on Progressive Collapse of
Shield Tunnel[J]. Tunnel Construction, 2021
, 41(6)
: 913
-922
.
DOI: 10.3973/j.issn.2096-4498.2021.06.003
