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For constructing tunnels passing through shallow slope, the
interactionbetween slope and tunnel is an important factor which
should be carefully examined in addition to check the tunnel
safety itself due to topography and geology. In this study, the
interaction behavior between the slope andthe Hsinnten(I) Tunnel
of Northern Second Freeway is examined by consideringthe factors
of geological condition, topography, and construction sequence.
The deformation of slope and tunnels are studied under different
construction sequence. The effects of back-fill at the toe of
slope to the deformation oftunnel are also studied. It is found
in this study, the deformation of the slope will be
significantlysmaller if the slope could be pre-stabilized before
the tunnel construction.The side-gallery method indeed can
reduce the tunnel deformation and unevenbehavior. The back-fill
at the toe of slope is proved a very useful action whiletreating
a deformed tunnel under shallow slope.
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