Abstract Simulation was carried out by using ANSYS software to analyze the effect of ground buildings on the shallow-buried section of the under-passing New Baotashan tunnel. Stresses and lining safety of the under-passing tunnel with different overburdens and distances to the buildings were acquired. Results showed that the influence of the residential buildings on the tunnel will be maximum when the outer edge of pile foundation was 4 meters distant from the existing side-wall of tunnel. And the lining structure displacements were less if the distance was changed to 8 meters, with the safety of tunnel structure meeting the requirements of tunnel design specifications. Therefore it is suggested the 8m spacing to be taken in design program. When the backfilling depth was 3m, calculations showed that the tunnel will still be safe. The thickness of backfilling can be determined based on the designed ground elevation of 1009 (the maximum backfilling depth is 3m and the embedded depth is 10.7 m).
Abstract：
Simulation was carried out by using ANSYS software to analyze the effect of ground buildings on the shallow-buried section of the under-passing New Baotashan tunnel. Stresses and lining safety of the under-passing tunnel with different overburdens and distances to the buildings were acquired. Results showed that the influence of the residential buildings on the tunnel will be maximum when the outer edge of pile foundation was 4 meters distant from the existing side-wall of tunnel. And the lining structure displacements were less if the distance was changed to 8 meters, with the safety of tunnel structure meeting the requirements of tunnel design specifications. Therefore it is suggested the 8m spacing to be taken in design program. When the backfilling depth was 3m, calculations showed that the tunnel will still be safe. The thickness of backfilling can be determined based on the designed ground elevation of 1009 (the maximum backfilling depth is 3m and the embedded depth is 10.7 m).
ZHANG Li-Fang
.Analysis for the Influence of Ground Buildings on the Safety
of Under-passing Tunnels[J] MODERN TUNNELLING TECHNOLOGY, 2011,V48(3): 64-68
2011, Vol. 48 