Topology optimization to prevent tunnel heaves under different stress biaxialities
✍ Scribed by Luzhong Yin; Wei Yang
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 292 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0363-9061
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✦ Synopsis
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 "nite elements. The relative ratios of two phases in various elements are optimized by optimality criteria method so that the #oor or sidewall heave is minimized. The topology of reinforcement is designed to prevent #oor heave or sidewall heave of a tunnel surrounded by homogeneous rock. The stress biaxiality k dictates whether the #oor 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 #oor heaves. Part of the results is con"rmed in the practices.