LI Zhi-yong, YAN Li, YANG Jun-sheng. Numerical analysis and treatment of a collapsed middle drift for shallow multi-arch tunnel under unsymmetrical pressure[J]. 2007, 28(1).
LI Zhi-yong, YAN Li, YANG Jun-sheng. Numerical analysis and treatment of a collapsed middle drift for shallow multi-arch tunnel under unsymmetrical pressure[J]. 2007, 28(1).DOI:
During construction of the middle drift of a multi-arch tunnel
collapse accident occurred. According to the field geological and construction conditions
the numerical model is set up; and the commercial software FLAC is adopted to simulate the behaviors of the tunnel and surrounding rock. Based on the results of plastic zones in surround rocks
deformations in rock and lining
and the inner forces within rock bolts and reinforced concrete lining
the deformation of the tunnel and the causes of tunnel collapse are analyzed. The corresponding effective remedy measures are proposed; and good results are achieved.