Topology optimization to prevent tunnel heaves under different stress biaxialities
Topology optimization to prevent tunnel heaves under different stress biaxialities
复制标题
拓扑优化防止不同应力双轴度下隧道隆起
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
Wei Yang
中科院分区：
文献类型：
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作者：
L. Yin;Wei Yang
在隧道施工中，底板或侧壁隆起是一个严重的问题。我们提出了一个由原始岩体和完全锚固岩体组成的两相混合模型。主地面采用有限元方法离散化。采用最优准则法对各构件中两相的相对比进行优化，使底板或侧壁的隆起最小。钢筋拓扑结构的设计是为了防止均质围岩隧道的底鼓或侧壁隆起。应力双轴性k决定了巷道变形是由底鼓还是侧壁鼓控制。结果表明，在隧洞拐角附近设置加固对防止巷道边墙和底鼓具有重要意义。部分结果在实践中得到了验证。
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.