Premium
Topology optimization to prevent tunnel heaves under different stress biaxialities
Author(s) -
Yin Luzhong,
Yang Wei
Publication year - 2000
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/1096-9853(20000810)24:9<783::aid-nag96>3.0.co;2-x
Subject(s) - structural engineering , topology optimization , discretization , engineering , geotechnical engineering , stress (linguistics) , rock mass classification , finite element method , topology (electrical circuits) , mathematics , mathematical analysis , linguistics , philosophy , electrical engineering
Floor or sidewall heave imposes a severe issue in tunnel construction. We propose a two‐phase mixture model consisting of the original rock and the fully anchored rock mass. The host ground is discretized by finite elements. The relative ratios of two phases in various elements are optimized by optimality criteria method so that the floor or sidewall heave is minimized. The topology of reinforcement is designed to prevent floor heave or sidewall heave of a tunnel surrounded by homogeneous rock. The stress biaxiality k dictates whether the floor heave or the sidewall heave control the tunnel distortion. The results indicate the importance to set reinforcement near the tunnel corners to prevent sidewall and floor heaves. Part of the results is confirmed in the practices. Copyright © 2000 John Wiley & Sons, Ltd.