拓扑优化在隧道工程中的运用

Application of Topology Optimization in Tunnel Engineering

摘要:

拓扑优化作为结构优化的高层次优化方法，目前正成为工程界研究的热点，而对于隧道工程的拓扑优化还未见研究成果。建立了隧道洞室的拓扑优化模型，利用高层次拓扑优化理论对隧道洞室进行了拓扑优化分析，提出了预强支护理论，即开挖围岩影响区内进行强支护结合复合衬砌支护的三层支护体系，通过拓扑优化分析确定了预强支护的具体位置。

关键词:隧道工程;拓扑优化;结构优化;柔性支护;强支护

Abstract:

Topology optimization is a high level optimization method of structural optimization, which is a focus study of engineering field. But there is no research achievement in topology optimization of tunnel engineering. In this paper, tunnel model of topology optimization is established; topology optimization analysis on tunnel cavern is made with high-level topology optimization theory; and pre-strengthening support theory is put forward, which is three-layers support combined with primary-supporting and inner lining and strong support on wall rock. The place of pre-strengthening support is found out by the analysis of topology optimization. It shows that this method is reasonable and effective and can be used as reference in the construction and design of road tunnel.

Key words:tunnel engineering; topology optimization; structural optimization; flexible retaining; strong support