Abstract：Based on the fire test on prototype shield tunnel lining segment and the
high-temperature water-pressure resistance tests on watertight rubber strip of
joint, some performance or laws, including the temperature conduction performance
of segment joint and the distribution law of temperature field under the high
temperature of fire disaster, the deformation law of segment joint, and the
variation law of watertight performance of shield segment joint, were studied. From
the perspectives of joint temperature distribution, deformation characteristic and
watertight performance, the performance of shield tunnel segment joint in fire
disaster was investigated, it was shown that: (1) After experiencing the fire for
about 30 minutes, the concrete at the fire burned side of tunnel segment may crack
and the radial cracks may be concentratedly developed, the high temperature may
cause substantial deformation of segment joint, and the duration time of fire
disaster may directly affect the watertight performance of segment joint; (2) In
the fire disaster, the high-temperature resistance of EPDM rubber for the joint is
better than that of water swelling rubber; (3) The temperature of 165℃ is the
critical temperature for the watertight function of sealing rubber strip for the
lining segment joint.
